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drm/imx: Add initial support for DCSS on iMX8MQ

Browse Source 
This adds initial support for iMX8MQ's Display Controller Subsystem (DCSS).
Some of its capabilities include:
 * 4K@60fps;
 * HDR10;
 * one graphics and 2 video pipelines;
 * on-the-fly decompression of compressed video and graphics;

The reference manual can be found here:
https://www.nxp.com/webapp/Download?colCode=IMX8MDQLQRM

The current patch adds only basic functionality: one primary plane for
graphics, linear, tiled and super-tiled buffers support (no graphics
decompression yet), no HDR10 and no video planes.

Video planes support and HDR10 will be added in subsequent patches once
per-plane de-gamma/CSC/gamma support is in.

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@nxp.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Guido Günther <agx@sigxcpu.org>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200731081836.3048-3-laurentiu.palcu@oss.nxp.com
This commit is contained in:
Laurentiu Palcu 2020-07-31 11:18:30 +03:00 committed by Lucas Stach
parent ce625f4567
commit 9021c317b7
17 changed files with 3962 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/imx/Kconfig
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@ -39,3 +39,5 @@ config DRM_IMX_HDMI
depends on DRM_IMX
help
Choose this if you want to use HDMI on i.MX6.
source "drivers/gpu/drm/imx/dcss/Kconfig"

1
drivers/gpu/drm/imx/Makefile
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@ -9,3 +9,4 @@ obj-$(CONFIG_DRM_IMX_TVE) += imx-tve.o
obj-$(CONFIG_DRM_IMX_LDB) += imx-ldb.o
obj-$(CONFIG_DRM_IMX_HDMI) += dw_hdmi-imx.o
obj-$(CONFIG_DRM_IMX_DCSS) += dcss/

9
drivers/gpu/drm/imx/dcss/Kconfig Normal file
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@ -0,0 +1,9 @@
config DRM_IMX_DCSS
tristate "i.MX8MQ DCSS"
select IMX_IRQSTEER
select DRM_KMS_CMA_HELPER
select VIDEOMODE_HELPERS
depends on DRM && ARCH_MXC
help
Choose this if you have a NXP i.MX8MQ based system and want to use the
Display Controller Subsystem. This option enables DCSS support.

6
drivers/gpu/drm/imx/dcss/Makefile Normal file
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@ -0,0 +1,6 @@
imx-dcss-objs := dcss-drv.o dcss-dev.o dcss-blkctl.o dcss-ctxld.o dcss-dtg.o \
dcss-ss.o dcss-dpr.o dcss-scaler.o dcss-kms.o dcss-crtc.o \
dcss-plane.o
obj-$(CONFIG_DRM_IMX_DCSS) += imx-dcss.o

70
drivers/gpu/drm/imx/dcss/dcss-blkctl.c Normal file
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@ -0,0 +1,70 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <linux/device.h>
#include <linux/of.h>
#include <linux/slab.h>
#include "dcss-dev.h"
#define DCSS_BLKCTL_RESET_CTRL 0x00
#define B_CLK_RESETN BIT(0)
#define APB_CLK_RESETN BIT(1)
#define P_CLK_RESETN BIT(2)
#define RTR_CLK_RESETN BIT(4)
#define DCSS_BLKCTL_CONTROL0 0x10
#define HDMI_MIPI_CLK_SEL BIT(0)
#define DISPMIX_REFCLK_SEL_POS 4
#define DISPMIX_REFCLK_SEL_MASK GENMASK(5, 4)
#define DISPMIX_PIXCLK_SEL BIT(8)
#define HDMI_SRC_SECURE_EN BIT(16)
struct dcss_blkctl {
struct dcss_dev *dcss;
void __iomem *base_reg;
};
void dcss_blkctl_cfg(struct dcss_blkctl *blkctl)
{
if (blkctl->dcss->hdmi_output)
dcss_writel(0, blkctl->base_reg + DCSS_BLKCTL_CONTROL0);
else
dcss_writel(DISPMIX_PIXCLK_SEL,
blkctl->base_reg + DCSS_BLKCTL_CONTROL0);
dcss_set(B_CLK_RESETN | APB_CLK_RESETN | P_CLK_RESETN | RTR_CLK_RESETN,
blkctl->base_reg + DCSS_BLKCTL_RESET_CTRL);
}
int dcss_blkctl_init(struct dcss_dev *dcss, unsigned long blkctl_base)
{
struct dcss_blkctl *blkctl;
blkctl = kzalloc(sizeof(*blkctl), GFP_KERNEL);
if (!blkctl)
return -ENOMEM;
blkctl->base_reg = ioremap(blkctl_base, SZ_4K);
if (!blkctl->base_reg) {
dev_err(dcss->dev, "unable to remap BLK CTRL base\n");
kfree(blkctl);
return -ENOMEM;
}
dcss->blkctl = blkctl;
blkctl->dcss = dcss;
dcss_blkctl_cfg(blkctl);
return 0;
}
void dcss_blkctl_exit(struct dcss_blkctl *blkctl)
{
if (blkctl->base_reg)
iounmap(blkctl->base_reg);
kfree(blkctl);
}

219
drivers/gpu/drm/imx/dcss/dcss-crtc.c Normal file
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@ -0,0 +1,219 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_vblank.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include "dcss-dev.h"
#include "dcss-kms.h"
static int dcss_enable_vblank(struct drm_crtc *crtc)
{
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = crtc->dev->dev_private;
dcss_dtg_vblank_irq_enable(dcss->dtg, true);
dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, true);
enable_irq(dcss_crtc->irq);
return 0;
}
static void dcss_disable_vblank(struct drm_crtc *crtc)
{
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
disable_irq_nosync(dcss_crtc->irq);
dcss_dtg_vblank_irq_enable(dcss->dtg, false);
if (dcss_crtc->disable_ctxld_kick_irq)
dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, false);
}
static const struct drm_crtc_funcs dcss_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.destroy = drm_crtc_cleanup,
.page_flip = drm_atomic_helper_page_flip,
.reset = drm_atomic_helper_crtc_reset,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.enable_vblank = dcss_enable_vblank,
.disable_vblank = dcss_disable_vblank,
};
static void dcss_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
drm_crtc_vblank_on(crtc);
}
static void dcss_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
spin_lock_irq(&crtc->dev->event_lock);
if (crtc->state->event) {
WARN_ON(drm_crtc_vblank_get(crtc));
drm_crtc_arm_vblank_event(crtc, crtc->state->event);
crtc->state->event = NULL;
}
spin_unlock_irq(&crtc->dev->event_lock);
if (dcss_dtg_is_enabled(dcss->dtg))
dcss_ctxld_enable(dcss->ctxld);
}
static void dcss_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
struct drm_display_mode *old_mode = &old_crtc_state->adjusted_mode;
struct videomode vm;
drm_display_mode_to_videomode(mode, &vm);
pm_runtime_get_sync(dcss->dev);
vm.pixelclock = mode->crtc_clock * 1000;
dcss_ss_subsam_set(dcss->ss);
dcss_dtg_css_set(dcss->dtg);
if (!drm_mode_equal(mode, old_mode) || !old_crtc_state->active) {
dcss_dtg_sync_set(dcss->dtg, &vm);
dcss_ss_sync_set(dcss->ss, &vm,
mode->flags & DRM_MODE_FLAG_PHSYNC,
mode->flags & DRM_MODE_FLAG_PVSYNC);
}
dcss_enable_dtg_and_ss(dcss);
dcss_ctxld_enable(dcss->ctxld);
/* Allow CTXLD kick interrupt to be disabled when VBLANK is disabled. */
dcss_crtc->disable_ctxld_kick_irq = true;
}
static void dcss_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc,
base);
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
struct drm_display_mode *old_mode = &old_crtc_state->adjusted_mode;
drm_atomic_helper_disable_planes_on_crtc(old_crtc_state, false);
spin_lock_irq(&crtc->dev->event_lock);
if (crtc->state->event) {
drm_crtc_send_vblank_event(crtc, crtc->state->event);
crtc->state->event = NULL;
}
spin_unlock_irq(&crtc->dev->event_lock);
dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, true);
reinit_completion(&dcss->disable_completion);
dcss_disable_dtg_and_ss(dcss);
dcss_ctxld_enable(dcss->ctxld);
if (!drm_mode_equal(mode, old_mode) || !crtc->state->active)
if (!wait_for_completion_timeout(&dcss->disable_completion,
msecs_to_jiffies(100)))
dev_err(dcss->dev, "Shutting off DTG timed out.\n");
/*
* Do not shut off CTXLD kick interrupt when shutting VBLANK off. It
* will be needed to commit the last changes, before going to suspend.
*/
dcss_crtc->disable_ctxld_kick_irq = false;
drm_crtc_vblank_off(crtc);
pm_runtime_mark_last_busy(dcss->dev);
pm_runtime_put_autosuspend(dcss->dev);
}
static const struct drm_crtc_helper_funcs dcss_helper_funcs = {
.atomic_begin = dcss_crtc_atomic_begin,
.atomic_flush = dcss_crtc_atomic_flush,
.atomic_enable = dcss_crtc_atomic_enable,
.atomic_disable = dcss_crtc_atomic_disable,
};
static irqreturn_t dcss_crtc_irq_handler(int irq, void *dev_id)
{
struct dcss_crtc *dcss_crtc = dev_id;
struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private;
if (!dcss_dtg_vblank_irq_valid(dcss->dtg))
return IRQ_NONE;
if (dcss_ctxld_is_flushed(dcss->ctxld))
drm_crtc_handle_vblank(&dcss_crtc->base);
dcss_dtg_vblank_irq_clear(dcss->dtg);
return IRQ_HANDLED;
}
int dcss_crtc_init(struct dcss_crtc *crtc, struct drm_device *drm)
{
struct dcss_dev *dcss = drm->dev_private;
struct platform_device *pdev = to_platform_device(dcss->dev);
int ret;
crtc->plane[0] = dcss_plane_init(drm, drm_crtc_mask(&crtc->base),
DRM_PLANE_TYPE_PRIMARY, 0);
if (IS_ERR(crtc->plane[0]))
return PTR_ERR(crtc->plane[0]);
crtc->base.port = dcss->of_port;
drm_crtc_helper_add(&crtc->base, &dcss_helper_funcs);
ret = drm_crtc_init_with_planes(drm, &crtc->base, &crtc->plane[0]->base,
NULL, &dcss_crtc_funcs, NULL);
if (ret) {
dev_err(dcss->dev, "failed to init crtc\n");
return ret;
}
crtc->irq = platform_get_irq_byname(pdev, "vblank");
if (crtc->irq < 0)
return crtc->irq;
ret = request_irq(crtc->irq, dcss_crtc_irq_handler,
0, "dcss_drm", crtc);
if (ret) {
dev_err(dcss->dev, "irq request failed with %d.\n", ret);
return ret;
}
disable_irq(crtc->irq);
return 0;
}
void dcss_crtc_deinit(struct dcss_crtc *crtc, struct drm_device *drm)
{
free_irq(crtc->irq, crtc);
}

424
drivers/gpu/drm/imx/dcss/dcss-ctxld.c Normal file
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@ -0,0 +1,424 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "dcss-dev.h"
#define DCSS_CTXLD_CONTROL_STATUS 0x0
#define CTXLD_ENABLE BIT(0)
#define ARB_SEL BIT(1)
#define RD_ERR_EN BIT(2)
#define DB_COMP_EN BIT(3)
#define SB_HP_COMP_EN BIT(4)
#define SB_LP_COMP_EN BIT(5)
#define DB_PEND_SB_REC_EN BIT(6)
#define SB_PEND_DISP_ACTIVE_EN BIT(7)
#define AHB_ERR_EN BIT(8)
#define RD_ERR BIT(16)
#define DB_COMP BIT(17)
#define SB_HP_COMP BIT(18)
#define SB_LP_COMP BIT(19)
#define DB_PEND_SB_REC BIT(20)
#define SB_PEND_DISP_ACTIVE BIT(21)
#define AHB_ERR BIT(22)
#define DCSS_CTXLD_DB_BASE_ADDR 0x10
#define DCSS_CTXLD_DB_COUNT 0x14
#define DCSS_CTXLD_SB_BASE_ADDR 0x18
#define DCSS_CTXLD_SB_COUNT 0x1C
#define SB_HP_COUNT_POS 0
#define SB_HP_COUNT_MASK 0xffff
#define SB_LP_COUNT_POS 16
#define SB_LP_COUNT_MASK 0xffff0000
#define DCSS_AHB_ERR_ADDR 0x20
#define CTXLD_IRQ_COMPLETION (DB_COMP | SB_HP_COMP | SB_LP_COMP)
#define CTXLD_IRQ_ERROR (RD_ERR | DB_PEND_SB_REC | AHB_ERR)
/* The following sizes are in context loader entries, 8 bytes each. */
#define CTXLD_DB_CTX_ENTRIES 1024 /* max 65536 */
#define CTXLD_SB_LP_CTX_ENTRIES 10240 /* max 65536 */
#define CTXLD_SB_HP_CTX_ENTRIES 20000 /* max 65536 */
#define CTXLD_SB_CTX_ENTRIES (CTXLD_SB_LP_CTX_ENTRIES + \
CTXLD_SB_HP_CTX_ENTRIES)
/* Sizes, in entries, of the DB, SB_HP and SB_LP context regions. */
static u16 dcss_ctxld_ctx_size[3] = {
CTXLD_DB_CTX_ENTRIES,
CTXLD_SB_HP_CTX_ENTRIES,
CTXLD_SB_LP_CTX_ENTRIES
};
/* this represents an entry in the context loader map */
struct dcss_ctxld_item {
u32 val;
u32 ofs;
};
#define CTX_ITEM_SIZE sizeof(struct dcss_ctxld_item)
struct dcss_ctxld {
struct device *dev;
void __iomem *ctxld_reg;
int irq;
bool irq_en;
struct dcss_ctxld_item *db[2];
struct dcss_ctxld_item *sb_hp[2];
struct dcss_ctxld_item *sb_lp[2];
dma_addr_t db_paddr[2];
dma_addr_t sb_paddr[2];
u16 ctx_size[2][3]; /* holds the sizes of DB, SB_HP and SB_LP ctx */
u8 current_ctx;
bool in_use;
bool armed;
spinlock_t lock; /* protects concurent access to private data */
};
static irqreturn_t dcss_ctxld_irq_handler(int irq, void *data)
{
struct dcss_ctxld *ctxld = data;
struct dcss_dev *dcss = dcss_drv_dev_to_dcss(ctxld->dev);
u32 irq_status;
irq_status = dcss_readl(ctxld->ctxld_reg + DCSS_CTXLD_CONTROL_STATUS);
if (irq_status & CTXLD_IRQ_COMPLETION &&
!(irq_status & CTXLD_ENABLE) && ctxld->in_use) {
ctxld->in_use = false;
if (dcss && dcss->disable_callback)
dcss->disable_callback(dcss);
} else if (irq_status & CTXLD_IRQ_ERROR) {
/*
* Except for throwing an error message and clearing the status
* register, there's not much we can do here.
*/
dev_err(ctxld->dev, "ctxld: error encountered: %08x\n",
irq_status);
dev_err(ctxld->dev, "ctxld: db=%d, sb_hp=%d, sb_lp=%d\n",
ctxld->ctx_size[ctxld->current_ctx ^ 1][CTX_DB],
ctxld->ctx_size[ctxld->current_ctx ^ 1][CTX_SB_HP],
ctxld->ctx_size[ctxld->current_ctx ^ 1][CTX_SB_LP]);
}
dcss_clr(irq_status & (CTXLD_IRQ_ERROR | CTXLD_IRQ_COMPLETION),
ctxld->ctxld_reg + DCSS_CTXLD_CONTROL_STATUS);
return IRQ_HANDLED;
}
static int dcss_ctxld_irq_config(struct dcss_ctxld *ctxld,
struct platform_device *pdev)
{
int ret;
ctxld->irq = platform_get_irq_byname(pdev, "ctxld");
if (ctxld->irq < 0)
return ctxld->irq;
ret = request_irq(ctxld->irq, dcss_ctxld_irq_handler,
0, "dcss_ctxld", ctxld);
if (ret) {
dev_err(ctxld->dev, "ctxld: irq request failed.\n");
return ret;
}
ctxld->irq_en = true;
return 0;
}
static void dcss_ctxld_hw_cfg(struct dcss_ctxld *ctxld)
{
dcss_writel(RD_ERR_EN | SB_HP_COMP_EN |
DB_PEND_SB_REC_EN | AHB_ERR_EN | RD_ERR | AHB_ERR,
ctxld->ctxld_reg + DCSS_CTXLD_CONTROL_STATUS);
}
static void dcss_ctxld_free_ctx(struct dcss_ctxld *ctxld)
{
struct dcss_ctxld_item *ctx;
int i;
for (i = 0; i < 2; i++) {
if (ctxld->db[i]) {
dma_free_coherent(ctxld->dev,
CTXLD_DB_CTX_ENTRIES * sizeof(*ctx),
ctxld->db[i], ctxld->db_paddr[i]);
ctxld->db[i] = NULL;
ctxld->db_paddr[i] = 0;
}
if (ctxld->sb_hp[i]) {
dma_free_coherent(ctxld->dev,
CTXLD_SB_CTX_ENTRIES * sizeof(*ctx),
ctxld->sb_hp[i], ctxld->sb_paddr[i]);
ctxld->sb_hp[i] = NULL;
ctxld->sb_paddr[i] = 0;
}
}
}
static int dcss_ctxld_alloc_ctx(struct dcss_ctxld *ctxld)
{
struct dcss_ctxld_item *ctx;
int i;
for (i = 0; i < 2; i++) {
ctx = dma_alloc_coherent(ctxld->dev,
CTXLD_DB_CTX_ENTRIES * sizeof(*ctx),
&ctxld->db_paddr[i], GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctxld->db[i] = ctx;
ctx = dma_alloc_coherent(ctxld->dev,
CTXLD_SB_CTX_ENTRIES * sizeof(*ctx),
&ctxld->sb_paddr[i], GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctxld->sb_hp[i] = ctx;
ctxld->sb_lp[i] = ctx + CTXLD_SB_HP_CTX_ENTRIES;
}
return 0;
}
int dcss_ctxld_init(struct dcss_dev *dcss, unsigned long ctxld_base)
{
struct dcss_ctxld *ctxld;
int ret;
ctxld = kzalloc(sizeof(*ctxld), GFP_KERNEL);
if (!ctxld)
return -ENOMEM;
dcss->ctxld = ctxld;
ctxld->dev = dcss->dev;
spin_lock_init(&ctxld->lock);
ret = dcss_ctxld_alloc_ctx(ctxld);
if (ret) {
dev_err(dcss->dev, "ctxld: cannot allocate context memory.\n");
goto err;
}
ctxld->ctxld_reg = ioremap(ctxld_base, SZ_4K);
if (!ctxld->ctxld_reg) {
dev_err(dcss->dev, "ctxld: unable to remap ctxld base\n");
ret = -ENOMEM;
goto err;
}
ret = dcss_ctxld_irq_config(ctxld, to_platform_device(dcss->dev));
if (ret)
goto err_irq;
dcss_ctxld_hw_cfg(ctxld);
return 0;
err_irq:
iounmap(ctxld->ctxld_reg);
err:
dcss_ctxld_free_ctx(ctxld);
kfree(ctxld);
return ret;
}
void dcss_ctxld_exit(struct dcss_ctxld *ctxld)
{
free_irq(ctxld->irq, ctxld);
if (ctxld->ctxld_reg)
iounmap(ctxld->ctxld_reg);
dcss_ctxld_free_ctx(ctxld);
kfree(ctxld);
}
static int dcss_ctxld_enable_locked(struct dcss_ctxld *ctxld)
{
int curr_ctx = ctxld->current_ctx;
u32 db_base, sb_base, sb_count;
u32 sb_hp_cnt, sb_lp_cnt, db_cnt;
struct dcss_dev *dcss = dcss_drv_dev_to_dcss(ctxld->dev);
if (!dcss)
return 0;
dcss_dpr_write_sysctrl(dcss->dpr);
dcss_scaler_write_sclctrl(dcss->scaler);
sb_hp_cnt = ctxld->ctx_size[curr_ctx][CTX_SB_HP];
sb_lp_cnt = ctxld->ctx_size[curr_ctx][CTX_SB_LP];
db_cnt = ctxld->ctx_size[curr_ctx][CTX_DB];
/* make sure SB_LP context area comes after SB_HP */
if (sb_lp_cnt &&
ctxld->sb_lp[curr_ctx] != ctxld->sb_hp[curr_ctx] + sb_hp_cnt) {
struct dcss_ctxld_item *sb_lp_adjusted;
sb_lp_adjusted = ctxld->sb_hp[curr_ctx] + sb_hp_cnt;
memcpy(sb_lp_adjusted, ctxld->sb_lp[curr_ctx],
sb_lp_cnt * CTX_ITEM_SIZE);
}
db_base = db_cnt ? ctxld->db_paddr[curr_ctx] : 0;
dcss_writel(db_base, ctxld->ctxld_reg + DCSS_CTXLD_DB_BASE_ADDR);
dcss_writel(db_cnt, ctxld->ctxld_reg + DCSS_CTXLD_DB_COUNT);
if (sb_hp_cnt)
sb_count = ((sb_hp_cnt << SB_HP_COUNT_POS) & SB_HP_COUNT_MASK) |
((sb_lp_cnt << SB_LP_COUNT_POS) & SB_LP_COUNT_MASK);
else
sb_count = (sb_lp_cnt << SB_HP_COUNT_POS) & SB_HP_COUNT_MASK;
sb_base = sb_count ? ctxld->sb_paddr[curr_ctx] : 0;
dcss_writel(sb_base, ctxld->ctxld_reg + DCSS_CTXLD_SB_BASE_ADDR);
dcss_writel(sb_count, ctxld->ctxld_reg + DCSS_CTXLD_SB_COUNT);
/* enable the context loader */
dcss_set(CTXLD_ENABLE, ctxld->ctxld_reg + DCSS_CTXLD_CONTROL_STATUS);
ctxld->in_use = true;
/*
* Toggle the current context to the alternate one so that any updates
* in the modules' settings take place there.
*/
ctxld->current_ctx ^= 1;
ctxld->ctx_size[ctxld->current_ctx][CTX_DB] = 0;
ctxld->ctx_size[ctxld->current_ctx][CTX_SB_HP] = 0;
ctxld->ctx_size[ctxld->current_ctx][CTX_SB_LP] = 0;
return 0;
}
int dcss_ctxld_enable(struct dcss_ctxld *ctxld)
{
spin_lock_irq(&ctxld->lock);
ctxld->armed = true;
spin_unlock_irq(&ctxld->lock);
return 0;
}
void dcss_ctxld_kick(struct dcss_ctxld *ctxld)
{
unsigned long flags;
spin_lock_irqsave(&ctxld->lock, flags);
if (ctxld->armed && !ctxld->in_use) {
ctxld->armed = false;
dcss_ctxld_enable_locked(ctxld);
}
spin_unlock_irqrestore(&ctxld->lock, flags);
}
void dcss_ctxld_write_irqsafe(struct dcss_ctxld *ctxld, u32 ctx_id, u32 val,
u32 reg_ofs)
{
int curr_ctx = ctxld->current_ctx;
struct dcss_ctxld_item *ctx[] = {
[CTX_DB] = ctxld->db[curr_ctx],
[CTX_SB_HP] = ctxld->sb_hp[curr_ctx],
[CTX_SB_LP] = ctxld->sb_lp[curr_ctx]
};
int item_idx = ctxld->ctx_size[curr_ctx][ctx_id];
if (item_idx + 1 > dcss_ctxld_ctx_size[ctx_id]) {
WARN_ON(1);
return;
}
ctx[ctx_id][item_idx].val = val;
ctx[ctx_id][item_idx].ofs = reg_ofs;
ctxld->ctx_size[curr_ctx][ctx_id] += 1;
}
void dcss_ctxld_write(struct dcss_ctxld *ctxld, u32 ctx_id,
u32 val, u32 reg_ofs)
{
spin_lock_irq(&ctxld->lock);
dcss_ctxld_write_irqsafe(ctxld, ctx_id, val, reg_ofs);
spin_unlock_irq(&ctxld->lock);
}
bool dcss_ctxld_is_flushed(struct dcss_ctxld *ctxld)
{
return ctxld->ctx_size[ctxld->current_ctx][CTX_DB] == 0 &&
ctxld->ctx_size[ctxld->current_ctx][CTX_SB_HP] == 0 &&
ctxld->ctx_size[ctxld->current_ctx][CTX_SB_LP] == 0;
}
int dcss_ctxld_resume(struct dcss_ctxld *ctxld)
{
dcss_ctxld_hw_cfg(ctxld);
if (!ctxld->irq_en) {
enable_irq(ctxld->irq);
ctxld->irq_en = true;
}
return 0;
}
int dcss_ctxld_suspend(struct dcss_ctxld *ctxld)
{
int ret = 0;
unsigned long timeout = jiffies + msecs_to_jiffies(500);
if (!dcss_ctxld_is_flushed(ctxld)) {
dcss_ctxld_kick(ctxld);
while (!time_after(jiffies, timeout) && ctxld->in_use)
msleep(20);
if (time_after(jiffies, timeout))
return -ETIMEDOUT;
}
spin_lock_irq(&ctxld->lock);
if (ctxld->irq_en) {
disable_irq_nosync(ctxld->irq);
ctxld->irq_en = false;
}
/* reset context region and sizes */
ctxld->current_ctx = 0;
ctxld->ctx_size[0][CTX_DB] = 0;
ctxld->ctx_size[0][CTX_SB_HP] = 0;
ctxld->ctx_size[0][CTX_SB_LP] = 0;
spin_unlock_irq(&ctxld->lock);
return ret;
}
void dcss_ctxld_assert_locked(struct dcss_ctxld *ctxld)
{
lockdep_assert_held(&ctxld->lock);
}

314
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <linux/clk.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <drm/drm_modeset_helper.h>
#include "dcss-dev.h"
static void dcss_clocks_enable(struct dcss_dev *dcss)
{
clk_prepare_enable(dcss->axi_clk);
clk_prepare_enable(dcss->apb_clk);
clk_prepare_enable(dcss->rtrm_clk);
clk_prepare_enable(dcss->dtrc_clk);
clk_prepare_enable(dcss->pix_clk);
}
static void dcss_clocks_disable(struct dcss_dev *dcss)
{
clk_disable_unprepare(dcss->pix_clk);
clk_disable_unprepare(dcss->dtrc_clk);
clk_disable_unprepare(dcss->rtrm_clk);
clk_disable_unprepare(dcss->apb_clk);
clk_disable_unprepare(dcss->axi_clk);
}
static void dcss_disable_dtg_and_ss_cb(void *data)
{
struct dcss_dev *dcss = data;
dcss->disable_callback = NULL;
dcss_ss_shutoff(dcss->ss);
dcss_dtg_shutoff(dcss->dtg);
complete(&dcss->disable_completion);
}
void dcss_disable_dtg_and_ss(struct dcss_dev *dcss)
{
dcss->disable_callback = dcss_disable_dtg_and_ss_cb;
}
void dcss_enable_dtg_and_ss(struct dcss_dev *dcss)
{
if (dcss->disable_callback)
dcss->disable_callback = NULL;
dcss_dtg_enable(dcss->dtg);
dcss_ss_enable(dcss->ss);
}
static int dcss_submodules_init(struct dcss_dev *dcss)
{
int ret = 0;
u32 base_addr = dcss->start_addr;
const struct dcss_type_data *devtype = dcss->devtype;
dcss_clocks_enable(dcss);
ret = dcss_blkctl_init(dcss, base_addr + devtype->blkctl_ofs);
if (ret)
return ret;
ret = dcss_ctxld_init(dcss, base_addr + devtype->ctxld_ofs);
if (ret)
goto ctxld_err;
ret = dcss_dtg_init(dcss, base_addr + devtype->dtg_ofs);
if (ret)
goto dtg_err;
ret = dcss_ss_init(dcss, base_addr + devtype->ss_ofs);
if (ret)
goto ss_err;
ret = dcss_dpr_init(dcss, base_addr + devtype->dpr_ofs);
if (ret)
goto dpr_err;
ret = dcss_scaler_init(dcss, base_addr + devtype->scaler_ofs);
if (ret)
goto scaler_err;
dcss_clocks_disable(dcss);
return 0;
scaler_err:
dcss_dpr_exit(dcss->dpr);
dpr_err:
dcss_ss_exit(dcss->ss);
ss_err:
dcss_dtg_exit(dcss->dtg);
dtg_err:
dcss_ctxld_exit(dcss->ctxld);
ctxld_err:
dcss_blkctl_exit(dcss->blkctl);
dcss_clocks_disable(dcss);
return ret;
}
static void dcss_submodules_stop(struct dcss_dev *dcss)
{
dcss_clocks_enable(dcss);
dcss_scaler_exit(dcss->scaler);
dcss_dpr_exit(dcss->dpr);
dcss_ss_exit(dcss->ss);
dcss_dtg_exit(dcss->dtg);
dcss_ctxld_exit(dcss->ctxld);
dcss_blkctl_exit(dcss->blkctl);
dcss_clocks_disable(dcss);
}
static int dcss_clks_init(struct dcss_dev *dcss)
{
int i;
struct {
const char *id;
struct clk **clk;
} clks[] = {
{"apb", &dcss->apb_clk},
{"axi", &dcss->axi_clk},
{"pix", &dcss->pix_clk},
{"rtrm", &dcss->rtrm_clk},
{"dtrc", &dcss->dtrc_clk},
};
for (i = 0; i < ARRAY_SIZE(clks); i++) {
*clks[i].clk = devm_clk_get(dcss->dev, clks[i].id);
if (IS_ERR(*clks[i].clk)) {
dev_err(dcss->dev, "failed to get %s clock\n",
clks[i].id);
return PTR_ERR(*clks[i].clk);
}
}
return 0;
}
static void dcss_clks_release(struct dcss_dev *dcss)
{
devm_clk_put(dcss->dev, dcss->dtrc_clk);
devm_clk_put(dcss->dev, dcss->rtrm_clk);
devm_clk_put(dcss->dev, dcss->pix_clk);
devm_clk_put(dcss->dev, dcss->axi_clk);
devm_clk_put(dcss->dev, dcss->apb_clk);
}
struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output)
{
struct platform_device *pdev = to_platform_device(dev);
int ret;
struct resource *res;
struct dcss_dev *dcss;
const struct dcss_type_data *devtype;
devtype = of_device_get_match_data(dev);
if (!devtype) {
dev_err(dev, "no device match found\n");
return ERR_PTR(-ENODEV);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "cannot get memory resource\n");
return ERR_PTR(-EINVAL);
}
dcss = kzalloc(sizeof(*dcss), GFP_KERNEL);
if (!dcss)
return ERR_PTR(-ENOMEM);
dcss->dev = dev;
dcss->devtype = devtype;
dcss->hdmi_output = hdmi_output;
ret = dcss_clks_init(dcss);
if (ret) {
dev_err(dev, "clocks initialization failed\n");
goto err;
}
dcss->of_port = of_graph_get_port_by_id(dev->of_node, 0);
if (!dcss->of_port) {
dev_err(dev, "no port@0 node in %s\n", dev->of_node->full_name);
ret = -ENODEV;
goto clks_err;
}
dcss->start_addr = res->start;
ret = dcss_submodules_init(dcss);
if (ret) {
dev_err(dev, "submodules initialization failed\n");
goto clks_err;
}
init_completion(&dcss->disable_completion);
pm_runtime_set_autosuspend_delay(dev, 100);
pm_runtime_use_autosuspend(dev);
pm_runtime_set_suspended(dev);
pm_runtime_allow(dev);
pm_runtime_enable(dev);
return dcss;
clks_err:
dcss_clks_release(dcss);
err:
kfree(dcss);
return ERR_PTR(ret);
}
void dcss_dev_destroy(struct dcss_dev *dcss)
{
if (!pm_runtime_suspended(dcss->dev)) {
dcss_ctxld_suspend(dcss->ctxld);
dcss_clocks_disable(dcss);
}
pm_runtime_disable(dcss->dev);
dcss_submodules_stop(dcss);
dcss_clks_release(dcss);
kfree(dcss);
}
#ifdef CONFIG_PM_SLEEP
int dcss_dev_suspend(struct device *dev)
{
struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dev);
int ret;
drm_mode_config_helper_suspend(dcss_drv_dev_to_drm(dev));
if (pm_runtime_suspended(dev))
return 0;
ret = dcss_ctxld_suspend(dcss->ctxld);
if (ret)
return ret;
dcss_clocks_disable(dcss);
return 0;
}
int dcss_dev_resume(struct device *dev)
{
struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dev);
if (pm_runtime_suspended(dev)) {
drm_mode_config_helper_resume(dcss_drv_dev_to_drm(dev));
return 0;
}
dcss_clocks_enable(dcss);
dcss_blkctl_cfg(dcss->blkctl);
dcss_ctxld_resume(dcss->ctxld);
drm_mode_config_helper_resume(dcss_drv_dev_to_drm(dev));
return 0;
}
#endif /* CONFIG_PM_SLEEP */
#ifdef CONFIG_PM
int dcss_dev_runtime_suspend(struct device *dev)
{
struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dev);
int ret;
ret = dcss_ctxld_suspend(dcss->ctxld);
if (ret)
return ret;
dcss_clocks_disable(dcss);
return 0;
}
int dcss_dev_runtime_resume(struct device *dev)
{
struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dev);
dcss_clocks_enable(dcss);
dcss_blkctl_cfg(dcss->blkctl);
dcss_ctxld_resume(dcss->ctxld);
return 0;
}
#endif /* CONFIG_PM */

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2019 NXP.
*/
#ifndef __DCSS_PRV_H__
#define __DCSS_PRV_H__
#include <drm/drm_fourcc.h>
#include <linux/io.h>
#include <video/videomode.h>
#define SET 0x04
#define CLR 0x08
#define TGL 0x0C
#define dcss_writel(v, c) writel((v), (c))
#define dcss_readl(c) readl(c)
#define dcss_set(v, c) writel((v), (c) + SET)
#define dcss_clr(v, c) writel((v), (c) + CLR)
#define dcss_toggle(v, c) writel((v), (c) + TGL)
static inline void dcss_update(u32 v, u32 m, void __iomem *c)
{
writel((readl(c) & ~(m)) | (v), (c));
}
#define DCSS_DBG_REG(reg) {.name = #reg, .ofs = reg}
enum {
DCSS_IMX8MQ = 0,
};
struct dcss_type_data {
const char *name;
u32 blkctl_ofs;
u32 ctxld_ofs;
u32 rdsrc_ofs;
u32 wrscl_ofs;
u32 dtg_ofs;
u32 scaler_ofs;
u32 ss_ofs;
u32 dpr_ofs;
u32 dtrc_ofs;
u32 dec400d_ofs;
u32 hdr10_ofs;
};
struct dcss_debug_reg {
char *name;
u32 ofs;
};
enum dcss_ctxld_ctx_type {
CTX_DB,
CTX_SB_HP, /* high-priority */
CTX_SB_LP, /* low-priority */
};
struct dcss_dev {
struct device *dev;
const struct dcss_type_data *devtype;
struct device_node *of_port;
u32 start_addr;
struct dcss_blkctl *blkctl;
struct dcss_ctxld *ctxld;
struct dcss_dpr *dpr;
struct dcss_dtg *dtg;
struct dcss_ss *ss;
struct dcss_hdr10 *hdr10;
struct dcss_scaler *scaler;
struct dcss_dtrc *dtrc;
struct dcss_dec400d *dec400d;
struct dcss_wrscl *wrscl;
struct dcss_rdsrc *rdsrc;
struct clk *apb_clk;
struct clk *axi_clk;
struct clk *pix_clk;
struct clk *rtrm_clk;
struct clk *dtrc_clk;
struct clk *pll_src_clk;
struct clk *pll_phy_ref_clk;
bool hdmi_output;
void (*disable_callback)(void *data);
struct completion disable_completion;
};
struct dcss_dev *dcss_drv_dev_to_dcss(struct device *dev);
struct drm_device *dcss_drv_dev_to_drm(struct device *dev);
struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output);
void dcss_dev_destroy(struct dcss_dev *dcss);
int dcss_dev_runtime_suspend(struct device *dev);
int dcss_dev_runtime_resume(struct device *dev);
int dcss_dev_suspend(struct device *dev);
int dcss_dev_resume(struct device *dev);
void dcss_enable_dtg_and_ss(struct dcss_dev *dcss);
void dcss_disable_dtg_and_ss(struct dcss_dev *dcss);
/* BLKCTL */
int dcss_blkctl_init(struct dcss_dev *dcss, unsigned long blkctl_base);
void dcss_blkctl_cfg(struct dcss_blkctl *blkctl);
void dcss_blkctl_exit(struct dcss_blkctl *blkctl);
/* CTXLD */
int dcss_ctxld_init(struct dcss_dev *dcss, unsigned long ctxld_base);
void dcss_ctxld_exit(struct dcss_ctxld *ctxld);
void dcss_ctxld_write(struct dcss_ctxld *ctxld, u32 ctx_id,
u32 val, u32 reg_idx);
int dcss_ctxld_resume(struct dcss_ctxld *dcss_ctxld);
int dcss_ctxld_suspend(struct dcss_ctxld *dcss_ctxld);
void dcss_ctxld_write_irqsafe(struct dcss_ctxld *ctlxd, u32 ctx_id, u32 val,
u32 reg_ofs);
void dcss_ctxld_kick(struct dcss_ctxld *ctxld);
bool dcss_ctxld_is_flushed(struct dcss_ctxld *ctxld);
int dcss_ctxld_enable(struct dcss_ctxld *ctxld);
void dcss_ctxld_register_completion(struct dcss_ctxld *ctxld,
struct completion *dis_completion);
void dcss_ctxld_assert_locked(struct dcss_ctxld *ctxld);
/* DPR */
int dcss_dpr_init(struct dcss_dev *dcss, unsigned long dpr_base);
void dcss_dpr_exit(struct dcss_dpr *dpr);
void dcss_dpr_write_sysctrl(struct dcss_dpr *dpr);
void dcss_dpr_set_res(struct dcss_dpr *dpr, int ch_num, u32 xres, u32 yres);
void dcss_dpr_addr_set(struct dcss_dpr *dpr, int ch_num, u32 luma_base_addr,
u32 chroma_base_addr, u16 pitch);
void dcss_dpr_enable(struct dcss_dpr *dpr, int ch_num, bool en);
void dcss_dpr_format_set(struct dcss_dpr *dpr, int ch_num,
const struct drm_format_info *format, u64 modifier);
void dcss_dpr_set_rotation(struct dcss_dpr *dpr, int ch_num, u32 rotation);
/* DTG */
int dcss_dtg_init(struct dcss_dev *dcss, unsigned long dtg_base);
void dcss_dtg_exit(struct dcss_dtg *dtg);
bool dcss_dtg_vblank_irq_valid(struct dcss_dtg *dtg);
void dcss_dtg_vblank_irq_enable(struct dcss_dtg *dtg, bool en);
void dcss_dtg_vblank_irq_clear(struct dcss_dtg *dtg);
void dcss_dtg_sync_set(struct dcss_dtg *dtg, struct videomode *vm);
void dcss_dtg_css_set(struct dcss_dtg *dtg);
void dcss_dtg_enable(struct dcss_dtg *dtg);
void dcss_dtg_shutoff(struct dcss_dtg *dtg);
bool dcss_dtg_is_enabled(struct dcss_dtg *dtg);
void dcss_dtg_ctxld_kick_irq_enable(struct dcss_dtg *dtg, bool en);
bool dcss_dtg_global_alpha_changed(struct dcss_dtg *dtg, int ch_num, int alpha);
void dcss_dtg_plane_alpha_set(struct dcss_dtg *dtg, int ch_num,
const struct drm_format_info *format, int alpha);
void dcss_dtg_plane_pos_set(struct dcss_dtg *dtg, int ch_num,
int px, int py, int pw, int ph);
void dcss_dtg_ch_enable(struct dcss_dtg *dtg, int ch_num, bool en);
/* SUBSAM */
int dcss_ss_init(struct dcss_dev *dcss, unsigned long subsam_base);
void dcss_ss_exit(struct dcss_ss *ss);
void dcss_ss_enable(struct dcss_ss *ss);
void dcss_ss_shutoff(struct dcss_ss *ss);
void dcss_ss_subsam_set(struct dcss_ss *ss);
void dcss_ss_sync_set(struct dcss_ss *ss, struct videomode *vm,
bool phsync, bool pvsync);
/* SCALER */
int dcss_scaler_init(struct dcss_dev *dcss, unsigned long scaler_base);
void dcss_scaler_exit(struct dcss_scaler *scl);
void dcss_scaler_setup(struct dcss_scaler *scl, int ch_num,
const struct drm_format_info *format,
int src_xres, int src_yres, int dst_xres, int dst_yres,
u32 vrefresh_hz);
void dcss_scaler_ch_enable(struct dcss_scaler *scl, int ch_num, bool en);
int dcss_scaler_get_min_max_ratios(struct dcss_scaler *scl, int ch_num,
int *min, int *max);
void dcss_scaler_write_sclctrl(struct dcss_scaler *scl);
#endif /* __DCSS_PRV_H__ */

562
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <linux/device.h>
#include <linux/slab.h>
#include "dcss-dev.h"
#define DCSS_DPR_SYSTEM_CTRL0 0x000
#define RUN_EN BIT(0)
#define SOFT_RESET BIT(1)
#define REPEAT_EN BIT(2)
#define SHADOW_LOAD_EN BIT(3)
#define SW_SHADOW_LOAD_SEL BIT(4)
#define BCMD2AXI_MSTR_ID_CTRL BIT(16)
#define DCSS_DPR_IRQ_MASK 0x020
#define DCSS_DPR_IRQ_MASK_STATUS 0x030
#define DCSS_DPR_IRQ_NONMASK_STATUS 0x040
#define IRQ_DPR_CTRL_DONE BIT(0)
#define IRQ_DPR_RUN BIT(1)
#define IRQ_DPR_SHADOW_LOADED BIT(2)
#define IRQ_AXI_READ_ERR BIT(3)
#define DPR2RTR_YRGB_FIFO_OVFL BIT(4)
#define DPR2RTR_UV_FIFO_OVFL BIT(5)
#define DPR2RTR_FIFO_LD_BUF_RDY_YRGB_ERR BIT(6)
#define DPR2RTR_FIFO_LD_BUF_RDY_UV_ERR BIT(7)
#define DCSS_DPR_MODE_CTRL0 0x050
#define RTR_3BUF_EN BIT(0)
#define RTR_4LINE_BUF_EN BIT(1)
#define TILE_TYPE_POS 2
#define TILE_TYPE_MASK GENMASK(4, 2)
#define YUV_EN BIT(6)
#define COMP_2PLANE_EN BIT(7)
#define PIX_SIZE_POS 8
#define PIX_SIZE_MASK GENMASK(9, 8)
#define PIX_LUMA_UV_SWAP BIT(10)
#define PIX_UV_SWAP BIT(11)
#define B_COMP_SEL_POS 12
#define B_COMP_SEL_MASK GENMASK(13, 12)
#define G_COMP_SEL_POS 14
#define G_COMP_SEL_MASK GENMASK(15, 14)
#define R_COMP_SEL_POS 16
#define R_COMP_SEL_MASK GENMASK(17, 16)
#define A_COMP_SEL_POS 18
#define A_COMP_SEL_MASK GENMASK(19, 18)
#define DCSS_DPR_FRAME_CTRL0 0x070
#define HFLIP_EN BIT(0)
#define VFLIP_EN BIT(1)
#define ROT_ENC_POS 2
#define ROT_ENC_MASK GENMASK(3, 2)
#define ROT_FLIP_ORDER_EN BIT(4)
#define PITCH_POS 16
#define PITCH_MASK GENMASK(31, 16)
#define DCSS_DPR_FRAME_1P_CTRL0 0x090
#define DCSS_DPR_FRAME_1P_PIX_X_CTRL 0x0A0
#define DCSS_DPR_FRAME_1P_PIX_Y_CTRL 0x0B0
#define DCSS_DPR_FRAME_1P_BASE_ADDR 0x0C0
#define DCSS_DPR_FRAME_2P_CTRL0 0x0E0
#define DCSS_DPR_FRAME_2P_PIX_X_CTRL 0x0F0
#define DCSS_DPR_FRAME_2P_PIX_Y_CTRL 0x100
#define DCSS_DPR_FRAME_2P_BASE_ADDR 0x110
#define DCSS_DPR_STATUS_CTRL0 0x130
#define STATUS_MUX_SEL_MASK GENMASK(2, 0)
#define STATUS_SRC_SEL_POS 16
#define STATUS_SRC_SEL_MASK GENMASK(18, 16)
#define DCSS_DPR_STATUS_CTRL1 0x140
#define DCSS_DPR_RTRAM_CTRL0 0x200
#define NUM_ROWS_ACTIVE BIT(0)
#define THRES_HIGH_POS 1
#define THRES_HIGH_MASK GENMASK(3, 1)
#define THRES_LOW_POS 4
#define THRES_LOW_MASK GENMASK(6, 4)
#define ABORT_SEL BIT(7)
enum dcss_tile_type {
TILE_LINEAR = 0,
TILE_GPU_STANDARD,
TILE_GPU_SUPER,
TILE_VPU_YUV420,
TILE_VPU_VP9,
};
enum dcss_pix_size {
PIX_SIZE_8,
PIX_SIZE_16,
PIX_SIZE_32,
};
struct dcss_dpr_ch {
struct dcss_dpr *dpr;
void __iomem *base_reg;
u32 base_ofs;
struct drm_format_info format;
enum dcss_pix_size pix_size;
enum dcss_tile_type tile;
bool rtram_4line_en;
bool rtram_3buf_en;
u32 frame_ctrl;
u32 mode_ctrl;
u32 sys_ctrl;
u32 rtram_ctrl;
bool sys_ctrl_chgd;
int ch_num;
int irq;
};
struct dcss_dpr {
struct device *dev;
struct dcss_ctxld *ctxld;
u32 ctx_id;
struct dcss_dpr_ch ch[3];
};
static void dcss_dpr_write(struct dcss_dpr_ch *ch, u32 val, u32 ofs)
{
struct dcss_dpr *dpr = ch->dpr;
dcss_ctxld_write(dpr->ctxld, dpr->ctx_id, val, ch->base_ofs + ofs);
}
static int dcss_dpr_ch_init_all(struct dcss_dpr *dpr, unsigned long dpr_base)
{
struct dcss_dpr_ch *ch;
int i;
for (i = 0; i < 3; i++) {
ch = &dpr->ch[i];
ch->base_ofs = dpr_base + i * 0x1000;
ch->base_reg = ioremap(ch->base_ofs, SZ_4K);
if (!ch->base_reg) {
dev_err(dpr->dev, "dpr: unable to remap ch %d base\n",
i);
return -ENOMEM;
}
ch->dpr = dpr;
ch->ch_num = i;
dcss_writel(0xff, ch->base_reg + DCSS_DPR_IRQ_MASK);
}
return 0;
}
int dcss_dpr_init(struct dcss_dev *dcss, unsigned long dpr_base)
{
struct dcss_dpr *dpr;
dpr = kzalloc(sizeof(*dpr), GFP_KERNEL);
if (!dpr)
return -ENOMEM;
dcss->dpr = dpr;
dpr->dev = dcss->dev;
dpr->ctxld = dcss->ctxld;
dpr->ctx_id = CTX_SB_HP;
if (dcss_dpr_ch_init_all(dpr, dpr_base)) {
int i;
for (i = 0; i < 3; i++) {
if (dpr->ch[i].base_reg)
iounmap(dpr->ch[i].base_reg);
}
kfree(dpr);
return -ENOMEM;
}
return 0;
}
void dcss_dpr_exit(struct dcss_dpr *dpr)
{
int ch_no;
/* stop DPR on all channels */
for (ch_no = 0; ch_no < 3; ch_no++) {
struct dcss_dpr_ch *ch = &dpr->ch[ch_no];
dcss_writel(0, ch->base_reg + DCSS_DPR_SYSTEM_CTRL0);
if (ch->base_reg)
iounmap(ch->base_reg);
}
kfree(dpr);
}
static u32 dcss_dpr_x_pix_wide_adjust(struct dcss_dpr_ch *ch, u32 pix_wide,
u32 pix_format)
{
u8 pix_in_64byte_map[3][5] = {
/* LIN, GPU_STD, GPU_SUP, VPU_YUV420, VPU_VP9 */
{ 64, 8, 8, 8, 16}, /* PIX_SIZE_8 */
{ 32, 8, 8, 8, 8}, /* PIX_SIZE_16 */
{ 16, 4, 4, 8, 8}, /* PIX_SIZE_32 */
};
u32 offset;
u32 div_64byte_mod, pix_in_64byte;
pix_in_64byte = pix_in_64byte_map[ch->pix_size][ch->tile];
div_64byte_mod = pix_wide % pix_in_64byte;
offset = (div_64byte_mod == 0) ? 0 : (pix_in_64byte - div_64byte_mod);
return pix_wide + offset;
}
static u32 dcss_dpr_y_pix_high_adjust(struct dcss_dpr_ch *ch, u32 pix_high,
u32 pix_format)
{
u8 num_rows_buf = ch->rtram_4line_en ? 4 : 8;
u32 offset, pix_y_mod;
pix_y_mod = pix_high % num_rows_buf;
offset = pix_y_mod ? (num_rows_buf - pix_y_mod) : 0;
return pix_high + offset;
}
void dcss_dpr_set_res(struct dcss_dpr *dpr, int ch_num, u32 xres, u32 yres)
{
struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
u32 pix_format = ch->format.format;
u32 gap = DCSS_DPR_FRAME_2P_BASE_ADDR - DCSS_DPR_FRAME_1P_BASE_ADDR;
int plane, max_planes = 1;
u32 pix_x_wide, pix_y_high;
if (pix_format == DRM_FORMAT_NV12 ||
pix_format == DRM_FORMAT_NV21)
max_planes = 2;
for (plane = 0; plane < max_planes; plane++) {
yres = plane == 1 ? yres >> 1 : yres;
pix_x_wide = dcss_dpr_x_pix_wide_adjust(ch, xres, pix_format);
pix_y_high = dcss_dpr_y_pix_high_adjust(ch, yres, pix_format);
dcss_dpr_write(ch, pix_x_wide,
DCSS_DPR_FRAME_1P_PIX_X_CTRL + plane * gap);
dcss_dpr_write(ch, pix_y_high,
DCSS_DPR_FRAME_1P_PIX_Y_CTRL + plane * gap);
dcss_dpr_write(ch, 2, DCSS_DPR_FRAME_1P_CTRL0 + plane * gap);
}
}
void dcss_dpr_addr_set(struct dcss_dpr *dpr, int ch_num, u32 luma_base_addr,
u32 chroma_base_addr, u16 pitch)
{
struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
dcss_dpr_write(ch, luma_base_addr, DCSS_DPR_FRAME_1P_BASE_ADDR);
dcss_dpr_write(ch, chroma_base_addr, DCSS_DPR_FRAME_2P_BASE_ADDR);
ch->frame_ctrl &= ~PITCH_MASK;
ch->frame_ctrl |= (((u32)pitch << PITCH_POS) & PITCH_MASK);
}
static void dcss_dpr_argb_comp_sel(struct dcss_dpr_ch *ch, int a_sel, int r_sel,
int g_sel, int b_sel)
{
u32 sel;
sel = ((a_sel << A_COMP_SEL_POS) & A_COMP_SEL_MASK) |
((r_sel << R_COMP_SEL_POS) & R_COMP_SEL_MASK) |
((g_sel << G_COMP_SEL_POS) & G_COMP_SEL_MASK) |
((b_sel << B_COMP_SEL_POS) & B_COMP_SEL_MASK);
ch->mode_ctrl &= ~(A_COMP_SEL_MASK | R_COMP_SEL_MASK |
G_COMP_SEL_MASK | B_COMP_SEL_MASK);
ch->mode_ctrl |= sel;
}
static void dcss_dpr_pix_size_set(struct dcss_dpr_ch *ch,
const struct drm_format_info *format)
{
u32 val;
switch (format->format) {
case DRM_FORMAT_NV12:
case DRM_FORMAT_NV21:
val = PIX_SIZE_8;
break;
case DRM_FORMAT_UYVY:
case DRM_FORMAT_VYUY:
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
val = PIX_SIZE_16;
break;
default:
val = PIX_SIZE_32;
break;
}
ch->pix_size = val;
ch->mode_ctrl &= ~PIX_SIZE_MASK;
ch->mode_ctrl |= ((val << PIX_SIZE_POS) & PIX_SIZE_MASK);
}
static void dcss_dpr_uv_swap(struct dcss_dpr_ch *ch, bool swap)
{
ch->mode_ctrl &= ~PIX_UV_SWAP;
ch->mode_ctrl |= (swap ? PIX_UV_SWAP : 0);
}
static void dcss_dpr_y_uv_swap(struct dcss_dpr_ch *ch, bool swap)
{
ch->mode_ctrl &= ~PIX_LUMA_UV_SWAP;
ch->mode_ctrl |= (swap ? PIX_LUMA_UV_SWAP : 0);
}
static void dcss_dpr_2plane_en(struct dcss_dpr_ch *ch, bool en)
{
ch->mode_ctrl &= ~COMP_2PLANE_EN;
ch->mode_ctrl |= (en ? COMP_2PLANE_EN : 0);
}
static void dcss_dpr_yuv_en(struct dcss_dpr_ch *ch, bool en)
{
ch->mode_ctrl &= ~YUV_EN;
ch->mode_ctrl |= (en ? YUV_EN : 0);
}
void dcss_dpr_enable(struct dcss_dpr *dpr, int ch_num, bool en)
{
struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
u32 sys_ctrl;
sys_ctrl = (en ? REPEAT_EN | RUN_EN : 0);
if (en) {
dcss_dpr_write(ch, ch->mode_ctrl, DCSS_DPR_MODE_CTRL0);
dcss_dpr_write(ch, ch->frame_ctrl, DCSS_DPR_FRAME_CTRL0);
dcss_dpr_write(ch, ch->rtram_ctrl, DCSS_DPR_RTRAM_CTRL0);
}
if (ch->sys_ctrl != sys_ctrl)
ch->sys_ctrl_chgd = true;
ch->sys_ctrl = sys_ctrl;
}
struct rgb_comp_sel {
u32 drm_format;
int a_sel;
int r_sel;
int g_sel;
int b_sel;
};
static struct rgb_comp_sel comp_sel_map[] = {
{DRM_FORMAT_ARGB8888, 3, 2, 1, 0},
{DRM_FORMAT_XRGB8888, 3, 2, 1, 0},
{DRM_FORMAT_ABGR8888, 3, 0, 1, 2},
{DRM_FORMAT_XBGR8888, 3, 0, 1, 2},
{DRM_FORMAT_RGBA8888, 0, 3, 2, 1},
{DRM_FORMAT_RGBX8888, 0, 3, 2, 1},
{DRM_FORMAT_BGRA8888, 0, 1, 2, 3},
{DRM_FORMAT_BGRX8888, 0, 1, 2, 3},
};
static int to_comp_sel(u32 pix_fmt, int *a_sel, int *r_sel, int *g_sel,
int *b_sel)
{
int i;
for (i = 0; i < ARRAY_SIZE(comp_sel_map); i++) {
if (comp_sel_map[i].drm_format == pix_fmt) {
*a_sel = comp_sel_map[i].a_sel;
*r_sel = comp_sel_map[i].r_sel;
*g_sel = comp_sel_map[i].g_sel;
*b_sel = comp_sel_map[i].b_sel;
return 0;
}
}
return -1;
}
static void dcss_dpr_rtram_set(struct dcss_dpr_ch *ch, u32 pix_format)
{
u32 val, mask;
switch (pix_format) {
case DRM_FORMAT_NV21:
case DRM_FORMAT_NV12:
ch->rtram_3buf_en = true;
ch->rtram_4line_en = false;
break;
default:
ch->rtram_3buf_en = true;
ch->rtram_4line_en = true;
break;
}
val = (ch->rtram_4line_en ? RTR_4LINE_BUF_EN : 0);
val |= (ch->rtram_3buf_en ? RTR_3BUF_EN : 0);
mask = RTR_4LINE_BUF_EN | RTR_3BUF_EN;
ch->mode_ctrl &= ~mask;
ch->mode_ctrl |= (val & mask);
val = (ch->rtram_4line_en ? 0 : NUM_ROWS_ACTIVE);
val |= (3 << THRES_LOW_POS) & THRES_LOW_MASK;
val |= (4 << THRES_HIGH_POS) & THRES_HIGH_MASK;
mask = THRES_LOW_MASK | THRES_HIGH_MASK | NUM_ROWS_ACTIVE;
ch->rtram_ctrl &= ~mask;
ch->rtram_ctrl |= (val & mask);
}
static void dcss_dpr_setup_components(struct dcss_dpr_ch *ch,
const struct drm_format_info *format)
{
int a_sel, r_sel, g_sel, b_sel;
bool uv_swap, y_uv_swap;
switch (format->format) {
case DRM_FORMAT_YVYU:
uv_swap = true;
y_uv_swap = true;
break;
case DRM_FORMAT_VYUY:
case DRM_FORMAT_NV21:
uv_swap = true;
y_uv_swap = false;
break;
case DRM_FORMAT_YUYV:
uv_swap = false;
y_uv_swap = true;
break;
default:
uv_swap = false;
y_uv_swap = false;
break;
}
dcss_dpr_uv_swap(ch, uv_swap);
dcss_dpr_y_uv_swap(ch, y_uv_swap);
if (!format->is_yuv) {
if (!to_comp_sel(format->format, &a_sel, &r_sel,
&g_sel, &b_sel)) {
dcss_dpr_argb_comp_sel(ch, a_sel, r_sel, g_sel, b_sel);
} else {
dcss_dpr_argb_comp_sel(ch, 3, 2, 1, 0);
}
} else {
dcss_dpr_argb_comp_sel(ch, 0, 0, 0, 0);
}
}
static void dcss_dpr_tile_set(struct dcss_dpr_ch *ch, uint64_t modifier)
{
switch (ch->ch_num) {
case 0:
switch (modifier) {
case DRM_FORMAT_MOD_LINEAR:
ch->tile = TILE_LINEAR;
break;
case DRM_FORMAT_MOD_VIVANTE_TILED:
ch->tile = TILE_GPU_STANDARD;
break;
case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
ch->tile = TILE_GPU_SUPER;
break;
default:
WARN_ON(1);
break;
}
break;
case 1:
case 2:
ch->tile = TILE_LINEAR;
break;
default:
WARN_ON(1);
return;
}
ch->mode_ctrl &= ~TILE_TYPE_MASK;
ch->mode_ctrl |= ((ch->tile << TILE_TYPE_POS) & TILE_TYPE_MASK);
}
void dcss_dpr_format_set(struct dcss_dpr *dpr, int ch_num,
const struct drm_format_info *format, u64 modifier)
{
struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
ch->format = *format;
dcss_dpr_yuv_en(ch, format->is_yuv);
dcss_dpr_pix_size_set(ch, format);
dcss_dpr_setup_components(ch, format);
dcss_dpr_2plane_en(ch, format->num_planes == 2);
dcss_dpr_rtram_set(ch, format->format);
dcss_dpr_tile_set(ch, modifier);
}
/* This function will be called from interrupt context. */
void dcss_dpr_write_sysctrl(struct dcss_dpr *dpr)
{
int chnum;
dcss_ctxld_assert_locked(dpr->ctxld);
for (chnum = 0; chnum < 3; chnum++) {
struct dcss_dpr_ch *ch = &dpr->ch[chnum];
if (ch->sys_ctrl_chgd) {
dcss_ctxld_write_irqsafe(dpr->ctxld, dpr->ctx_id,
ch->sys_ctrl,
ch->base_ofs +
DCSS_DPR_SYSTEM_CTRL0);
ch->sys_ctrl_chgd = false;
}
}
}
void dcss_dpr_set_rotation(struct dcss_dpr *dpr, int ch_num, u32 rotation)
{
struct dcss_dpr_ch *ch = &dpr->ch[ch_num];
ch->frame_ctrl &= ~(HFLIP_EN | VFLIP_EN | ROT_ENC_MASK);
ch->frame_ctrl |= rotation & DRM_MODE_REFLECT_X ? HFLIP_EN : 0;
ch->frame_ctrl |= rotation & DRM_MODE_REFLECT_Y ? VFLIP_EN : 0;
if (rotation & DRM_MODE_ROTATE_90)
ch->frame_ctrl |= 1 << ROT_ENC_POS;
else if (rotation & DRM_MODE_ROTATE_180)
ch->frame_ctrl |= 2 << ROT_ENC_POS;
else if (rotation & DRM_MODE_ROTATE_270)
ch->frame_ctrl |= 3 << ROT_ENC_POS;
}

138
drivers/gpu/drm/imx/dcss/dcss-drv.c Normal file
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@ -0,0 +1,138 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <drm/drm_of.h>
#include "dcss-dev.h"
#include "dcss-kms.h"
struct dcss_drv {
struct dcss_dev *dcss;
struct dcss_kms_dev *kms;
};
struct dcss_dev *dcss_drv_dev_to_dcss(struct device *dev)
{
struct dcss_drv *mdrv = dev_get_drvdata(dev);
return mdrv ? mdrv->dcss : NULL;
}
struct drm_device *dcss_drv_dev_to_drm(struct device *dev)
{
struct dcss_drv *mdrv = dev_get_drvdata(dev);
return mdrv ? &mdrv->kms->base : NULL;
}
static int dcss_drv_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *remote;
struct dcss_drv *mdrv;
int err = 0;
bool hdmi_output = true;
if (!dev->of_node)
return -ENODEV;
remote = of_graph_get_remote_node(dev->of_node, 0, 0);
if (!remote)
return -ENODEV;
hdmi_output = !of_device_is_compatible(remote, "fsl,imx8mq-nwl-dsi");
of_node_put(remote);
mdrv = kzalloc(sizeof(*mdrv), GFP_KERNEL);
if (!mdrv)
return -ENOMEM;
mdrv->dcss = dcss_dev_create(dev, hdmi_output);
if (IS_ERR(mdrv->dcss)) {
err = PTR_ERR(mdrv->dcss);
goto err;
}
dev_set_drvdata(dev, mdrv);
mdrv->kms = dcss_kms_attach(mdrv->dcss);
if (IS_ERR(mdrv->kms)) {
err = PTR_ERR(mdrv->kms);
goto dcss_shutoff;
}
return 0;
dcss_shutoff:
dcss_dev_destroy(mdrv->dcss);
dev_set_drvdata(dev, NULL);
err:
kfree(mdrv);
return err;
}
static int dcss_drv_platform_remove(struct platform_device *pdev)
{
struct dcss_drv *mdrv = dev_get_drvdata(&pdev->dev);
if (!mdrv)
return 0;
dcss_kms_detach(mdrv->kms);
dcss_dev_destroy(mdrv->dcss);
dev_set_drvdata(&pdev->dev, NULL);
kfree(mdrv);
return 0;
}
static struct dcss_type_data dcss_types[] = {
[DCSS_IMX8MQ] = {
.name = "DCSS_IMX8MQ",
.blkctl_ofs = 0x2F000,
.ctxld_ofs = 0x23000,
.dtg_ofs = 0x20000,
.scaler_ofs = 0x1C000,
.ss_ofs = 0x1B000,
.dpr_ofs = 0x18000,
},
};
static const struct of_device_id dcss_of_match[] = {
{ .compatible = "nxp,imx8mq-dcss", .data = &dcss_types[DCSS_IMX8MQ], },
{},
};
MODULE_DEVICE_TABLE(of, dcss_of_match);
static const struct dev_pm_ops dcss_dev_pm = {
SET_SYSTEM_SLEEP_PM_OPS(dcss_dev_suspend, dcss_dev_resume)
SET_RUNTIME_PM_OPS(dcss_dev_runtime_suspend,
dcss_dev_runtime_resume, NULL)
};
static struct platform_driver dcss_platform_driver = {
.probe = dcss_drv_platform_probe,
.remove = dcss_drv_platform_remove,
.driver = {
.name = "imx-dcss",
.of_match_table = dcss_of_match,
.pm = &dcss_dev_pm,
},
};
module_platform_driver(dcss_platform_driver);
MODULE_AUTHOR("Laurentiu Palcu <laurentiu.palcu@nxp.com>");
MODULE_DESCRIPTION("DCSS driver for i.MX8MQ");
MODULE_LICENSE("GPL v2");

409
drivers/gpu/drm/imx/dcss/dcss-dtg.c Normal file
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "dcss-dev.h"
#define DCSS_DTG_TC_CONTROL_STATUS 0x00
#define CH3_EN BIT(0)
#define CH2_EN BIT(1)
#define CH1_EN BIT(2)
#define OVL_DATA_MODE BIT(3)
#define BLENDER_VIDEO_ALPHA_SEL BIT(7)
#define DTG_START BIT(8)
#define DBY_MODE_EN BIT(9)
#define CH1_ALPHA_SEL BIT(10)
#define CSS_PIX_COMP_SWAP_POS 12
#define CSS_PIX_COMP_SWAP_MASK GENMASK(14, 12)
#define DEFAULT_FG_ALPHA_POS 24
#define DEFAULT_FG_ALPHA_MASK GENMASK(31, 24)
#define DCSS_DTG_TC_DTG 0x04
#define DCSS_DTG_TC_DISP_TOP 0x08
#define DCSS_DTG_TC_DISP_BOT 0x0C
#define DCSS_DTG_TC_CH1_TOP 0x10
#define DCSS_DTG_TC_CH1_BOT 0x14
#define DCSS_DTG_TC_CH2_TOP 0x18
#define DCSS_DTG_TC_CH2_BOT 0x1C
#define DCSS_DTG_TC_CH3_TOP 0x20
#define DCSS_DTG_TC_CH3_BOT 0x24
#define TC_X_POS 0
#define TC_X_MASK GENMASK(12, 0)
#define TC_Y_POS 16
#define TC_Y_MASK GENMASK(28, 16)
#define DCSS_DTG_TC_CTXLD 0x28
#define TC_CTXLD_DB_Y_POS 0
#define TC_CTXLD_DB_Y_MASK GENMASK(12, 0)
#define TC_CTXLD_SB_Y_POS 16
#define TC_CTXLD_SB_Y_MASK GENMASK(28, 16)
#define DCSS_DTG_TC_CH1_BKRND 0x2C
#define DCSS_DTG_TC_CH2_BKRND 0x30
#define BKRND_R_Y_COMP_POS 20
#define BKRND_R_Y_COMP_MASK GENMASK(29, 20)
#define BKRND_G_U_COMP_POS 10
#define BKRND_G_U_COMP_MASK GENMASK(19, 10)
#define BKRND_B_V_COMP_POS 0
#define BKRND_B_V_COMP_MASK GENMASK(9, 0)
#define DCSS_DTG_BLENDER_DBY_RANGEINV 0x38
#define DCSS_DTG_BLENDER_DBY_RANGEMIN 0x3C
#define DCSS_DTG_BLENDER_DBY_BDP 0x40
#define DCSS_DTG_BLENDER_BKRND_I 0x44
#define DCSS_DTG_BLENDER_BKRND_P 0x48
#define DCSS_DTG_BLENDER_BKRND_T 0x4C
#define DCSS_DTG_LINE0_INT 0x50
#define DCSS_DTG_LINE1_INT 0x54
#define DCSS_DTG_BG_ALPHA_DEFAULT 0x58
#define DCSS_DTG_INT_STATUS 0x5C
#define DCSS_DTG_INT_CONTROL 0x60
#define DCSS_DTG_TC_CH3_BKRND 0x64
#define DCSS_DTG_INT_MASK 0x68
#define LINE0_IRQ BIT(0)
#define LINE1_IRQ BIT(1)
#define LINE2_IRQ BIT(2)
#define LINE3_IRQ BIT(3)
#define DCSS_DTG_LINE2_INT 0x6C
#define DCSS_DTG_LINE3_INT 0x70
#define DCSS_DTG_DBY_OL 0x74
#define DCSS_DTG_DBY_BL 0x78
#define DCSS_DTG_DBY_EL 0x7C
struct dcss_dtg {
struct device *dev;
struct dcss_ctxld *ctxld;
void __iomem *base_reg;
u32 base_ofs;
u32 ctx_id;
bool in_use;
u32 dis_ulc_x;
u32 dis_ulc_y;
u32 control_status;
u32 alpha;
u32 alpha_cfg;
int ctxld_kick_irq;
bool ctxld_kick_irq_en;
};
static void dcss_dtg_write(struct dcss_dtg *dtg, u32 val, u32 ofs)
{
if (!dtg->in_use)
dcss_writel(val, dtg->base_reg + ofs);
dcss_ctxld_write(dtg->ctxld, dtg->ctx_id,
val, dtg->base_ofs + ofs);
}
static irqreturn_t dcss_dtg_irq_handler(int irq, void *data)
{
struct dcss_dtg *dtg = data;
u32 status;
status = dcss_readl(dtg->base_reg + DCSS_DTG_INT_STATUS);
if (!(status & LINE0_IRQ))
return IRQ_NONE;
dcss_ctxld_kick(dtg->ctxld);
dcss_writel(status & LINE0_IRQ, dtg->base_reg + DCSS_DTG_INT_CONTROL);
return IRQ_HANDLED;
}
static int dcss_dtg_irq_config(struct dcss_dtg *dtg,
struct platform_device *pdev)
{
int ret;
dtg->ctxld_kick_irq = platform_get_irq_byname(pdev, "ctxld_kick");
if (dtg->ctxld_kick_irq < 0)
return dtg->ctxld_kick_irq;
dcss_update(0, LINE0_IRQ | LINE1_IRQ,
dtg->base_reg + DCSS_DTG_INT_MASK);
ret = request_irq(dtg->ctxld_kick_irq, dcss_dtg_irq_handler,
0, "dcss_ctxld_kick", dtg);
if (ret) {
dev_err(dtg->dev, "dtg: irq request failed.\n");
return ret;
}
disable_irq(dtg->ctxld_kick_irq);
dtg->ctxld_kick_irq_en = false;
return 0;
}
int dcss_dtg_init(struct dcss_dev *dcss, unsigned long dtg_base)
{
int ret = 0;
struct dcss_dtg *dtg;
dtg = kzalloc(sizeof(*dtg), GFP_KERNEL);
if (!dtg)
return -ENOMEM;
dcss->dtg = dtg;
dtg->dev = dcss->dev;
dtg->ctxld = dcss->ctxld;
dtg->base_reg = ioremap(dtg_base, SZ_4K);
if (!dtg->base_reg) {
dev_err(dcss->dev, "dtg: unable to remap dtg base\n");
ret = -ENOMEM;
goto err_ioremap;
}
dtg->base_ofs = dtg_base;
dtg->ctx_id = CTX_DB;
dtg->alpha = 255;
dtg->control_status |= OVL_DATA_MODE | BLENDER_VIDEO_ALPHA_SEL |
((dtg->alpha << DEFAULT_FG_ALPHA_POS) & DEFAULT_FG_ALPHA_MASK);
ret = dcss_dtg_irq_config(dtg, to_platform_device(dcss->dev));
if (ret)
goto err_irq;
return 0;
err_irq:
iounmap(dtg->base_reg);
err_ioremap:
kfree(dtg);
return ret;
}
void dcss_dtg_exit(struct dcss_dtg *dtg)
{
free_irq(dtg->ctxld_kick_irq, dtg);
if (dtg->base_reg)
iounmap(dtg->base_reg);
kfree(dtg);
}
void dcss_dtg_sync_set(struct dcss_dtg *dtg, struct videomode *vm)
{
struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dtg->dev);
u16 dtg_lrc_x, dtg_lrc_y;
u16 dis_ulc_x, dis_ulc_y;
u16 dis_lrc_x, dis_lrc_y;
u32 sb_ctxld_trig, db_ctxld_trig;
u32 pixclock = vm->pixelclock;
u32 actual_clk;
dtg_lrc_x = vm->hfront_porch + vm->hback_porch + vm->hsync_len +
vm->hactive - 1;
dtg_lrc_y = vm->vfront_porch + vm->vback_porch + vm->vsync_len +
vm->vactive - 1;
dis_ulc_x = vm->hsync_len + vm->hback_porch - 1;
dis_ulc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch - 1;
dis_lrc_x = vm->hsync_len + vm->hback_porch + vm->hactive - 1;
dis_lrc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch +
vm->vactive - 1;
clk_disable_unprepare(dcss->pix_clk);
clk_set_rate(dcss->pix_clk, vm->pixelclock);
clk_prepare_enable(dcss->pix_clk);
actual_clk = clk_get_rate(dcss->pix_clk);
if (pixclock != actual_clk) {
dev_info(dtg->dev,
"Pixel clock set to %u kHz instead of %u kHz.\n",
(actual_clk / 1000), (pixclock / 1000));
}
dcss_dtg_write(dtg, ((dtg_lrc_y << TC_Y_POS) | dtg_lrc_x),
DCSS_DTG_TC_DTG);
dcss_dtg_write(dtg, ((dis_ulc_y << TC_Y_POS) | dis_ulc_x),
DCSS_DTG_TC_DISP_TOP);
dcss_dtg_write(dtg, ((dis_lrc_y << TC_Y_POS) | dis_lrc_x),
DCSS_DTG_TC_DISP_BOT);
dtg->dis_ulc_x = dis_ulc_x;
dtg->dis_ulc_y = dis_ulc_y;
sb_ctxld_trig = ((0 * dis_lrc_y / 100) << TC_CTXLD_SB_Y_POS) &
TC_CTXLD_SB_Y_MASK;
db_ctxld_trig = ((99 * dis_lrc_y / 100) << TC_CTXLD_DB_Y_POS) &
TC_CTXLD_DB_Y_MASK;
dcss_dtg_write(dtg, sb_ctxld_trig | db_ctxld_trig, DCSS_DTG_TC_CTXLD);
/* vblank trigger */
dcss_dtg_write(dtg, 0, DCSS_DTG_LINE1_INT);
/* CTXLD trigger */
dcss_dtg_write(dtg, ((90 * dis_lrc_y) / 100) << 16, DCSS_DTG_LINE0_INT);
}
void dcss_dtg_plane_pos_set(struct dcss_dtg *dtg, int ch_num,
int px, int py, int pw, int ph)
{
u16 p_ulc_x, p_ulc_y;
u16 p_lrc_x, p_lrc_y;
p_ulc_x = dtg->dis_ulc_x + px;
p_ulc_y = dtg->dis_ulc_y + py;
p_lrc_x = p_ulc_x + pw;
p_lrc_y = p_ulc_y + ph;
if (!px && !py && !pw && !ph) {
dcss_dtg_write(dtg, 0, DCSS_DTG_TC_CH1_TOP + 0x8 * ch_num);
dcss_dtg_write(dtg, 0, DCSS_DTG_TC_CH1_BOT + 0x8 * ch_num);
} else {
dcss_dtg_write(dtg, ((p_ulc_y << TC_Y_POS) | p_ulc_x),
DCSS_DTG_TC_CH1_TOP + 0x8 * ch_num);
dcss_dtg_write(dtg, ((p_lrc_y << TC_Y_POS) | p_lrc_x),
DCSS_DTG_TC_CH1_BOT + 0x8 * ch_num);
}
}
bool dcss_dtg_global_alpha_changed(struct dcss_dtg *dtg, int ch_num, int alpha)
{
if (ch_num)
return false;
return alpha != dtg->alpha;
}
void dcss_dtg_plane_alpha_set(struct dcss_dtg *dtg, int ch_num,
const struct drm_format_info *format, int alpha)
{
/* we care about alpha only when channel 0 is concerned */
if (ch_num)
return;
/*
* Use global alpha if pixel format does not have alpha channel or the
* user explicitly chose to use global alpha (i.e. alpha is not OPAQUE).
*/
if (!format->has_alpha || alpha != 255)
dtg->alpha_cfg = (alpha << DEFAULT_FG_ALPHA_POS) & DEFAULT_FG_ALPHA_MASK;
else /* use per-pixel alpha otherwise */
dtg->alpha_cfg = CH1_ALPHA_SEL;
dtg->alpha = alpha;
}
void dcss_dtg_css_set(struct dcss_dtg *dtg)
{
dtg->control_status |=
(0x5 << CSS_PIX_COMP_SWAP_POS) & CSS_PIX_COMP_SWAP_MASK;
}
void dcss_dtg_enable(struct dcss_dtg *dtg)
{
dtg->control_status |= DTG_START;
dtg->control_status &= ~(CH1_ALPHA_SEL | DEFAULT_FG_ALPHA_MASK);
dtg->control_status |= dtg->alpha_cfg;
dcss_dtg_write(dtg, dtg->control_status, DCSS_DTG_TC_CONTROL_STATUS);
dtg->in_use = true;
}
void dcss_dtg_shutoff(struct dcss_dtg *dtg)
{
dtg->control_status &= ~DTG_START;
dcss_writel(dtg->control_status,
dtg->base_reg + DCSS_DTG_TC_CONTROL_STATUS);
dtg->in_use = false;
}
bool dcss_dtg_is_enabled(struct dcss_dtg *dtg)
{
return dtg->in_use;
}
void dcss_dtg_ch_enable(struct dcss_dtg *dtg, int ch_num, bool en)
{
u32 ch_en_map[] = {CH1_EN, CH2_EN, CH3_EN};
u32 control_status;
control_status = dtg->control_status & ~ch_en_map[ch_num];
control_status |= en ? ch_en_map[ch_num] : 0;
control_status &= ~(CH1_ALPHA_SEL | DEFAULT_FG_ALPHA_MASK);
control_status |= dtg->alpha_cfg;
if (dtg->control_status != control_status)
dcss_dtg_write(dtg, control_status, DCSS_DTG_TC_CONTROL_STATUS);
dtg->control_status = control_status;
}
void dcss_dtg_vblank_irq_enable(struct dcss_dtg *dtg, bool en)
{
u32 status;
u32 mask = en ? LINE1_IRQ : 0;
if (en) {
status = dcss_readl(dtg->base_reg + DCSS_DTG_INT_STATUS);
dcss_writel(status & LINE1_IRQ,
dtg->base_reg + DCSS_DTG_INT_CONTROL);
}
dcss_update(mask, LINE1_IRQ, dtg->base_reg + DCSS_DTG_INT_MASK);
}
void dcss_dtg_ctxld_kick_irq_enable(struct dcss_dtg *dtg, bool en)
{
u32 status;
u32 mask = en ? LINE0_IRQ : 0;
if (en) {
status = dcss_readl(dtg->base_reg + DCSS_DTG_INT_STATUS);
if (!dtg->ctxld_kick_irq_en) {
dcss_writel(status & LINE0_IRQ,
dtg->base_reg + DCSS_DTG_INT_CONTROL);
enable_irq(dtg->ctxld_kick_irq);
dtg->ctxld_kick_irq_en = true;
dcss_update(mask, LINE0_IRQ,
dtg->base_reg + DCSS_DTG_INT_MASK);
}
return;
}
if (!dtg->ctxld_kick_irq_en)
return;
disable_irq_nosync(dtg->ctxld_kick_irq);
dtg->ctxld_kick_irq_en = false;
dcss_update(mask, LINE0_IRQ, dtg->base_reg + DCSS_DTG_INT_MASK);
}
void dcss_dtg_vblank_irq_clear(struct dcss_dtg *dtg)
{
dcss_update(LINE1_IRQ, LINE1_IRQ, dtg->base_reg + DCSS_DTG_INT_CONTROL);
}
bool dcss_dtg_vblank_irq_valid(struct dcss_dtg *dtg)
{
return !!(dcss_readl(dtg->base_reg + DCSS_DTG_INT_STATUS) & LINE1_IRQ);
}

177
drivers/gpu/drm/imx/dcss/dcss-kms.c Normal file
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "dcss-dev.h"
#include "dcss-kms.h"
DEFINE_DRM_GEM_CMA_FOPS(dcss_cma_fops);
static const struct drm_mode_config_funcs dcss_drm_mode_config_funcs = {
.fb_create = drm_gem_fb_create,
.output_poll_changed = drm_fb_helper_output_poll_changed,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
static struct drm_driver dcss_kms_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
.gem_free_object_unlocked = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = drm_gem_cma_dumb_create,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_export = drm_gem_prime_export,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
.gem_prime_vmap = drm_gem_cma_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = drm_gem_cma_prime_mmap,
.fops = &dcss_cma_fops,
.name = "imx-dcss",
.desc = "i.MX8MQ Display Subsystem",
.date = "20190917",
.major = 1,
.minor = 0,
.patchlevel = 0,
};
static const struct drm_mode_config_helper_funcs dcss_mode_config_helpers = {
.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};
static void dcss_kms_mode_config_init(struct dcss_kms_dev *kms)
{
struct drm_mode_config *config = &kms->base.mode_config;
drm_mode_config_init(&kms->base);
config->min_width = 1;
config->min_height = 1;
config->max_width = 4096;
config->max_height = 4096;
config->allow_fb_modifiers = true;
config->normalize_zpos = true;
config->funcs = &dcss_drm_mode_config_funcs;
config->helper_private = &dcss_mode_config_helpers;
}
static const struct drm_encoder_funcs dcss_kms_simple_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static int dcss_kms_setup_encoder(struct dcss_kms_dev *kms)
{
struct drm_device *ddev = &kms->base;
struct drm_encoder *encoder = &kms->encoder;
struct drm_crtc *crtc = (struct drm_crtc *)&kms->crtc;
struct drm_panel *panel;
struct drm_bridge *bridge;
int ret;
ret = drm_of_find_panel_or_bridge(ddev->dev->of_node, 0, 0,
&panel, &bridge);
if (ret)
return ret;
if (!bridge) {
dev_err(ddev->dev, "No bridge found %d.\n", ret);
return -ENODEV;
}
encoder->possible_crtcs = drm_crtc_mask(crtc);
ret = drm_encoder_init(&kms->base, encoder,
&dcss_kms_simple_encoder_funcs,
DRM_MODE_ENCODER_NONE, NULL);
if (ret) {
dev_err(ddev->dev, "Failed initializing encoder %d.\n", ret);
return ret;
}
return drm_bridge_attach(encoder, bridge, NULL, 0);
}
struct dcss_kms_dev *dcss_kms_attach(struct dcss_dev *dcss)
{
struct dcss_kms_dev *kms;
struct drm_device *drm;
struct dcss_crtc *crtc;
int ret;
kms = devm_drm_dev_alloc(dcss->dev, &dcss_kms_driver,
struct dcss_kms_dev, base);
if (IS_ERR(kms))
return kms;
drm = &kms->base;
crtc = &kms->crtc;
drm->dev_private = dcss;
dcss_kms_mode_config_init(kms);
ret = drm_vblank_init(drm, 1);
if (ret)
goto cleanup_mode_config;
drm->irq_enabled = true;
ret = dcss_crtc_init(crtc, drm);
if (ret)
goto cleanup_mode_config;
ret = dcss_kms_setup_encoder(kms);
if (ret)
goto cleanup_crtc;
drm_mode_config_reset(drm);
drm_kms_helper_poll_init(drm);
ret = drm_dev_register(drm, 0);
if (ret)
goto cleanup_crtc;
drm_fbdev_generic_setup(drm, 32);
return kms;
cleanup_crtc:
drm_kms_helper_poll_fini(drm);
dcss_crtc_deinit(crtc, drm);
cleanup_mode_config:
drm_mode_config_cleanup(drm);
drm->dev_private = NULL;
return ERR_PTR(ret);
}
void dcss_kms_detach(struct dcss_kms_dev *kms)
{
struct drm_device *drm = &kms->base;
drm_dev_unregister(drm);
drm_kms_helper_poll_fini(drm);
drm_atomic_helper_shutdown(drm);
drm_crtc_vblank_off(&kms->crtc.base);
drm->irq_enabled = false;
drm_mode_config_cleanup(drm);
dcss_crtc_deinit(&kms->crtc, drm);
drm->dev_private = NULL;
}

43
drivers/gpu/drm/imx/dcss/dcss-kms.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2019 NXP.
*/
#ifndef _DCSS_KMS_H_
#define _DCSS_KMS_H_
#include <drm/drm_encoder.h>
struct dcss_plane {
struct drm_plane base;
int ch_num;
};
struct dcss_crtc {
struct drm_crtc base;
struct drm_crtc_state *state;
struct dcss_plane *plane[3];
int irq;
bool disable_ctxld_kick_irq;
};
struct dcss_kms_dev {
struct drm_device base;
struct dcss_crtc crtc;
struct drm_encoder encoder;
};
struct dcss_kms_dev *dcss_kms_attach(struct dcss_dev *dcss);
void dcss_kms_detach(struct dcss_kms_dev *kms);
int dcss_crtc_init(struct dcss_crtc *crtc, struct drm_device *drm);
void dcss_crtc_deinit(struct dcss_crtc *crtc, struct drm_device *drm);
struct dcss_plane *dcss_plane_init(struct drm_device *drm,
unsigned int possible_crtcs,
enum drm_plane_type type,
unsigned int zpos);
#endif

405
drivers/gpu/drm/imx/dcss/dcss-plane.c Normal file
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include "dcss-dev.h"
#include "dcss-kms.h"
static const u32 dcss_common_formats[] = {
/* RGB */
DRM_FORMAT_ARGB8888,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_ABGR8888,
DRM_FORMAT_XBGR8888,
DRM_FORMAT_RGBA8888,
DRM_FORMAT_RGBX8888,
DRM_FORMAT_BGRA8888,
DRM_FORMAT_BGRX8888,
DRM_FORMAT_XRGB2101010,
DRM_FORMAT_XBGR2101010,
DRM_FORMAT_RGBX1010102,
DRM_FORMAT_BGRX1010102,
DRM_FORMAT_ARGB2101010,
DRM_FORMAT_ABGR2101010,
DRM_FORMAT_RGBA1010102,
DRM_FORMAT_BGRA1010102,
};
static const u64 dcss_video_format_modifiers[] = {
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID,
};
static const u64 dcss_graphics_format_modifiers[] = {
DRM_FORMAT_MOD_VIVANTE_TILED,
DRM_FORMAT_MOD_VIVANTE_SUPER_TILED,
DRM_FORMAT_MOD_LINEAR,
DRM_FORMAT_MOD_INVALID,
};
static inline struct dcss_plane *to_dcss_plane(struct drm_plane *p)
{
return container_of(p, struct dcss_plane, base);
}
static inline bool dcss_plane_fb_is_linear(const struct drm_framebuffer *fb)
{
return ((fb->flags & DRM_MODE_FB_MODIFIERS) == 0) ||
((fb->flags & DRM_MODE_FB_MODIFIERS) != 0 &&
fb->modifier == DRM_FORMAT_MOD_LINEAR);
}
static void dcss_plane_destroy(struct drm_plane *plane)
{
struct dcss_plane *dcss_plane = container_of(plane, struct dcss_plane,
base);
drm_plane_cleanup(plane);
kfree(dcss_plane);
}
static bool dcss_plane_format_mod_supported(struct drm_plane *plane,
u32 format,
u64 modifier)
{
switch (plane->type) {
case DRM_PLANE_TYPE_PRIMARY:
switch (format) {
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB2101010:
return modifier == DRM_FORMAT_MOD_LINEAR ||
modifier == DRM_FORMAT_MOD_VIVANTE_TILED ||
modifier == DRM_FORMAT_MOD_VIVANTE_SUPER_TILED;
default:
return modifier == DRM_FORMAT_MOD_LINEAR;
}
break;
case DRM_PLANE_TYPE_OVERLAY:
return modifier == DRM_FORMAT_MOD_LINEAR;
default:
return false;
}
}
static const struct drm_plane_funcs dcss_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = dcss_plane_destroy,
.reset = drm_atomic_helper_plane_reset,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
.format_mod_supported = dcss_plane_format_mod_supported,
};
static bool dcss_plane_can_rotate(const struct drm_format_info *format,
bool mod_present, u64 modifier,
unsigned int rotation)
{
bool linear_format = !mod_present ||
(mod_present && modifier == DRM_FORMAT_MOD_LINEAR);
u32 supported_rotation = DRM_MODE_ROTATE_0;
if (!format->is_yuv && linear_format)
supported_rotation = DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180 |
DRM_MODE_REFLECT_MASK;
else if (!format->is_yuv &&
modifier == DRM_FORMAT_MOD_VIVANTE_TILED)
supported_rotation = DRM_MODE_ROTATE_MASK |
DRM_MODE_REFLECT_MASK;
else if (format->is_yuv && linear_format &&
(format->format == DRM_FORMAT_NV12 ||
format->format == DRM_FORMAT_NV21))
supported_rotation = DRM_MODE_ROTATE_0 | DRM_MODE_ROTATE_180 |
DRM_MODE_REFLECT_MASK;
return !!(rotation & supported_rotation);
}
static bool dcss_plane_is_source_size_allowed(u16 src_w, u16 src_h, u32 pix_fmt)
{
if (src_w < 64 &&
(pix_fmt == DRM_FORMAT_NV12 || pix_fmt == DRM_FORMAT_NV21))
return false;
else if (src_w < 32 &&
(pix_fmt == DRM_FORMAT_UYVY || pix_fmt == DRM_FORMAT_VYUY ||
pix_fmt == DRM_FORMAT_YUYV || pix_fmt == DRM_FORMAT_YVYU))
return false;
return src_w >= 16 && src_h >= 8;
}
static int dcss_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct dcss_plane *dcss_plane = to_dcss_plane(plane);
struct dcss_dev *dcss = plane->dev->dev_private;
struct drm_framebuffer *fb = state->fb;
bool is_primary_plane = plane->type == DRM_PLANE_TYPE_PRIMARY;
struct drm_gem_cma_object *cma_obj;
struct drm_crtc_state *crtc_state;
int hdisplay, vdisplay;
int min, max;
int ret;
if (!fb || !state->crtc)
return 0;
cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
WARN_ON(!cma_obj);
crtc_state = drm_atomic_get_existing_crtc_state(state->state,
state->crtc);
hdisplay = crtc_state->adjusted_mode.hdisplay;
vdisplay = crtc_state->adjusted_mode.vdisplay;
if (!dcss_plane_is_source_size_allowed(state->src_w >> 16,
state->src_h >> 16,
fb->format->format)) {
DRM_DEBUG_KMS("Source plane size is not allowed!\n");
return -EINVAL;
}
dcss_scaler_get_min_max_ratios(dcss->scaler, dcss_plane->ch_num,
&min, &max);
ret = drm_atomic_helper_check_plane_state(state, crtc_state,
min, max, !is_primary_plane,
false);
if (ret)
return ret;
if (!state->visible)
return 0;
if (!dcss_plane_can_rotate(fb->format,
!!(fb->flags & DRM_MODE_FB_MODIFIERS),
fb->modifier,
state->rotation)) {
DRM_DEBUG_KMS("requested rotation is not allowed!\n");
return -EINVAL;
}
if ((state->crtc_x < 0 || state->crtc_y < 0 ||
state->crtc_x + state->crtc_w > hdisplay ||
state->crtc_y + state->crtc_h > vdisplay) &&
!dcss_plane_fb_is_linear(fb)) {
DRM_DEBUG_KMS("requested cropping operation is not allowed!\n");
return -EINVAL;
}
if ((fb->flags & DRM_MODE_FB_MODIFIERS) &&
!plane->funcs->format_mod_supported(plane,
fb->format->format,
fb->modifier)) {
DRM_DEBUG_KMS("Invalid modifier: %llx", fb->modifier);
return -EINVAL;
}
return 0;
}
static void dcss_plane_atomic_set_base(struct dcss_plane *dcss_plane)
{
struct drm_plane *plane = &dcss_plane->base;
struct drm_plane_state *state = plane->state;
struct dcss_dev *dcss = plane->dev->dev_private;
struct drm_framebuffer *fb = state->fb;
const struct drm_format_info *format = fb->format;
struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
unsigned long p1_ba = 0, p2_ba = 0;
if (!format->is_yuv ||
format->format == DRM_FORMAT_NV12 ||
format->format == DRM_FORMAT_NV21)
p1_ba = cma_obj->paddr + fb->offsets[0] +
fb->pitches[0] * (state->src.y1 >> 16) +
format->char_per_block[0] * (state->src.x1 >> 16);
else if (format->format == DRM_FORMAT_UYVY ||
format->format == DRM_FORMAT_VYUY ||
format->format == DRM_FORMAT_YUYV ||
format->format == DRM_FORMAT_YVYU)
p1_ba = cma_obj->paddr + fb->offsets[0] +
fb->pitches[0] * (state->src.y1 >> 16) +
2 * format->char_per_block[0] * (state->src.x1 >> 17);
if (format->format == DRM_FORMAT_NV12 ||
format->format == DRM_FORMAT_NV21)
p2_ba = cma_obj->paddr + fb->offsets[1] +
(((fb->pitches[1] >> 1) * (state->src.y1 >> 17) +
(state->src.x1 >> 17)) << 1);
dcss_dpr_addr_set(dcss->dpr, dcss_plane->ch_num, p1_ba, p2_ba,
fb->pitches[0]);
}
static bool dcss_plane_needs_setup(struct drm_plane_state *state,
struct drm_plane_state *old_state)
{
struct drm_framebuffer *fb = state->fb;
struct drm_framebuffer *old_fb = old_state->fb;
return state->crtc_x != old_state->crtc_x ||
state->crtc_y != old_state->crtc_y ||
state->crtc_w != old_state->crtc_w ||
state->crtc_h != old_state->crtc_h ||
state->src_x != old_state->src_x ||
state->src_y != old_state->src_y ||
state->src_w != old_state->src_w ||
state->src_h != old_state->src_h ||
fb->format->format != old_fb->format->format ||
fb->modifier != old_fb->modifier ||
state->rotation != old_state->rotation;
}
static void dcss_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct drm_plane_state *state = plane->state;
struct dcss_plane *dcss_plane = to_dcss_plane(plane);
struct dcss_dev *dcss = plane->dev->dev_private;
struct drm_framebuffer *fb = state->fb;
u32 pixel_format;
struct drm_crtc_state *crtc_state;
bool modifiers_present;
u32 src_w, src_h, dst_w, dst_h;
struct drm_rect src, dst;
bool enable = true;
if (!fb || !state->crtc || !state->visible)
return;
pixel_format = state->fb->format->format;
crtc_state = state->crtc->state;
modifiers_present = !!(fb->flags & DRM_MODE_FB_MODIFIERS);
if (old_state->fb && !drm_atomic_crtc_needs_modeset(crtc_state) &&
!dcss_plane_needs_setup(state, old_state)) {
dcss_plane_atomic_set_base(dcss_plane);
return;
}
src = plane->state->src;
dst = plane->state->dst;
/*
* The width and height after clipping.
*/
src_w = drm_rect_width(&src) >> 16;
src_h = drm_rect_height(&src) >> 16;
dst_w = drm_rect_width(&dst);
dst_h = drm_rect_height(&dst);
if (plane->type == DRM_PLANE_TYPE_OVERLAY &&
modifiers_present && fb->modifier == DRM_FORMAT_MOD_LINEAR)
modifiers_present = false;
dcss_dpr_format_set(dcss->dpr, dcss_plane->ch_num, state->fb->format,
modifiers_present ? fb->modifier :
DRM_FORMAT_MOD_LINEAR);
dcss_dpr_set_res(dcss->dpr, dcss_plane->ch_num, src_w, src_h);
dcss_dpr_set_rotation(dcss->dpr, dcss_plane->ch_num,
state->rotation);
dcss_plane_atomic_set_base(dcss_plane);
dcss_scaler_setup(dcss->scaler, dcss_plane->ch_num,
state->fb->format, src_w, src_h,
dst_w, dst_h,
drm_mode_vrefresh(&crtc_state->mode));
dcss_dtg_plane_pos_set(dcss->dtg, dcss_plane->ch_num,
dst.x1, dst.y1, dst_w, dst_h);
dcss_dtg_plane_alpha_set(dcss->dtg, dcss_plane->ch_num,
fb->format, state->alpha >> 8);
if (!dcss_plane->ch_num && (state->alpha >> 8) == 0)
enable = false;
dcss_dpr_enable(dcss->dpr, dcss_plane->ch_num, enable);
dcss_scaler_ch_enable(dcss->scaler, dcss_plane->ch_num, enable);
if (!enable)
dcss_dtg_plane_pos_set(dcss->dtg, dcss_plane->ch_num,
0, 0, 0, 0);
dcss_dtg_ch_enable(dcss->dtg, dcss_plane->ch_num, enable);
}
static void dcss_plane_atomic_disable(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
struct dcss_plane *dcss_plane = to_dcss_plane(plane);
struct dcss_dev *dcss = plane->dev->dev_private;
dcss_dpr_enable(dcss->dpr, dcss_plane->ch_num, false);
dcss_scaler_ch_enable(dcss->scaler, dcss_plane->ch_num, false);
dcss_dtg_plane_pos_set(dcss->dtg, dcss_plane->ch_num, 0, 0, 0, 0);
dcss_dtg_ch_enable(dcss->dtg, dcss_plane->ch_num, false);
}
static const struct drm_plane_helper_funcs dcss_plane_helper_funcs = {
.prepare_fb = drm_gem_fb_prepare_fb,
.atomic_check = dcss_plane_atomic_check,
.atomic_update = dcss_plane_atomic_update,
.atomic_disable = dcss_plane_atomic_disable,
};
struct dcss_plane *dcss_plane_init(struct drm_device *drm,
unsigned int possible_crtcs,
enum drm_plane_type type,
unsigned int zpos)
{
struct dcss_plane *dcss_plane;
const u64 *format_modifiers = dcss_video_format_modifiers;
int ret;
if (zpos > 2)
return ERR_PTR(-EINVAL);
dcss_plane = kzalloc(sizeof(*dcss_plane), GFP_KERNEL);
if (!dcss_plane) {
DRM_ERROR("failed to allocate plane\n");
return ERR_PTR(-ENOMEM);
}
if (type == DRM_PLANE_TYPE_PRIMARY)
format_modifiers = dcss_graphics_format_modifiers;
ret = drm_universal_plane_init(drm, &dcss_plane->base, possible_crtcs,
&dcss_plane_funcs, dcss_common_formats,
ARRAY_SIZE(dcss_common_formats),
format_modifiers, type, NULL);
if (ret) {
DRM_ERROR("failed to initialize plane\n");
kfree(dcss_plane);
return ERR_PTR(ret);
}
drm_plane_helper_add(&dcss_plane->base, &dcss_plane_helper_funcs);
ret = drm_plane_create_zpos_immutable_property(&dcss_plane->base, zpos);
if (ret)
return ERR_PTR(ret);
drm_plane_create_rotation_property(&dcss_plane->base,
DRM_MODE_ROTATE_0,
DRM_MODE_ROTATE_0 |
DRM_MODE_ROTATE_90 |
DRM_MODE_ROTATE_180 |
DRM_MODE_ROTATE_270 |
DRM_MODE_REFLECT_X |
DRM_MODE_REFLECT_Y);
dcss_plane->ch_num = zpos;
return dcss_plane;
}

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drivers/gpu/drm/imx/dcss/dcss-scaler.c Normal file
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*
* Scaling algorithms were contributed by Dzung Hoang <dzung.hoang@nxp.com>
*/
#include <linux/device.h>
#include <linux/slab.h>
#include "dcss-dev.h"
#define DCSS_SCALER_CTRL 0x00
#define SCALER_EN BIT(0)
#define REPEAT_EN BIT(4)
#define SCALE2MEM_EN BIT(8)
#define MEM2OFIFO_EN BIT(12)
#define DCSS_SCALER_OFIFO_CTRL 0x04
#define OFIFO_LOW_THRES_POS 0
#define OFIFO_LOW_THRES_MASK GENMASK(9, 0)
#define OFIFO_HIGH_THRES_POS 16
#define OFIFO_HIGH_THRES_MASK GENMASK(25, 16)
#define UNDERRUN_DETECT_CLR BIT(26)
#define LOW_THRES_DETECT_CLR BIT(27)
#define HIGH_THRES_DETECT_CLR BIT(28)
#define UNDERRUN_DETECT_EN BIT(29)
#define LOW_THRES_DETECT_EN BIT(30)
#define HIGH_THRES_DETECT_EN BIT(31)
#define DCSS_SCALER_SDATA_CTRL 0x08
#define YUV_EN BIT(0)
#define RTRAM_8LINES BIT(1)
#define Y_UV_BYTE_SWAP BIT(4)
#define A2R10G10B10_FORMAT_POS 8
#define A2R10G10B10_FORMAT_MASK GENMASK(11, 8)
#define DCSS_SCALER_BIT_DEPTH 0x0C
#define LUM_BIT_DEPTH_POS 0
#define LUM_BIT_DEPTH_MASK GENMASK(1, 0)
#define CHR_BIT_DEPTH_POS 4
#define CHR_BIT_DEPTH_MASK GENMASK(5, 4)
#define DCSS_SCALER_SRC_FORMAT 0x10
#define DCSS_SCALER_DST_FORMAT 0x14
#define FORMAT_MASK GENMASK(1, 0)
#define DCSS_SCALER_SRC_LUM_RES 0x18
#define DCSS_SCALER_SRC_CHR_RES 0x1C
#define DCSS_SCALER_DST_LUM_RES 0x20
#define DCSS_SCALER_DST_CHR_RES 0x24
#define WIDTH_POS 0
#define WIDTH_MASK GENMASK(11, 0)
#define HEIGHT_POS 16
#define HEIGHT_MASK GENMASK(27, 16)
#define DCSS_SCALER_V_LUM_START 0x48
#define V_START_MASK GENMASK(15, 0)
#define DCSS_SCALER_V_LUM_INC 0x4C
#define V_INC_MASK GENMASK(15, 0)
#define DCSS_SCALER_H_LUM_START 0x50
#define H_START_MASK GENMASK(18, 0)
#define DCSS_SCALER_H_LUM_INC 0x54
#define H_INC_MASK GENMASK(15, 0)
#define DCSS_SCALER_V_CHR_START 0x58
#define DCSS_SCALER_V_CHR_INC 0x5C
#define DCSS_SCALER_H_CHR_START 0x60
#define DCSS_SCALER_H_CHR_INC 0x64
#define DCSS_SCALER_COEF_VLUM 0x80
#define DCSS_SCALER_COEF_HLUM 0x140
#define DCSS_SCALER_COEF_VCHR 0x200
#define DCSS_SCALER_COEF_HCHR 0x300
struct dcss_scaler_ch {
void __iomem *base_reg;
u32 base_ofs;
struct dcss_scaler *scl;
u32 sdata_ctrl;
u32 scaler_ctrl;
bool scaler_ctrl_chgd;
u32 c_vstart;
u32 c_hstart;
};
struct dcss_scaler {
struct device *dev;
struct dcss_ctxld *ctxld;
u32 ctx_id;
struct dcss_scaler_ch ch[3];
};
/* scaler coefficients generator */
#define PSC_FRAC_BITS 30
#define PSC_FRAC_SCALE BIT(PSC_FRAC_BITS)
#define PSC_BITS_FOR_PHASE 4
#define PSC_NUM_PHASES 16
#define PSC_STORED_PHASES (PSC_NUM_PHASES / 2 + 1)
#define PSC_NUM_TAPS 7
#define PSC_NUM_TAPS_RGBA 5
#define PSC_COEFF_PRECISION 10
#define PSC_PHASE_FRACTION_BITS 13
#define PSC_PHASE_MASK (PSC_NUM_PHASES - 1)
#define PSC_Q_FRACTION 19
#define PSC_Q_ROUND_OFFSET (1 << (PSC_Q_FRACTION - 1))
/**
* mult_q() - Performs fixed-point multiplication.
* @A: multiplier
* @B: multiplicand
*/
static int mult_q(int A, int B)
{
int result;
s64 temp;
temp = (int64_t)A * (int64_t)B;
temp += PSC_Q_ROUND_OFFSET;
result = (int)(temp >> PSC_Q_FRACTION);
return result;
}
/**
* div_q() - Performs fixed-point division.
* @A: dividend
* @B: divisor
*/
static int div_q(int A, int B)
{
int result;
s64 temp;
temp = (int64_t)A << PSC_Q_FRACTION;
if ((temp >= 0 && B >= 0) || (temp < 0 && B < 0))
temp += B / 2;
else
temp -= B / 2;
result = (int)(temp / B);
return result;
}
/**
* exp_approx_q() - Compute approximation to exp(x) function using Taylor
* series.
* @x: fixed-point argument of exp function
*/
static int exp_approx_q(int x)
{
int sum = 1 << PSC_Q_FRACTION;
int term = 1 << PSC_Q_FRACTION;
term = mult_q(term, div_q(x, 1 << PSC_Q_FRACTION));
sum += term;
term = mult_q(term, div_q(x, 2 << PSC_Q_FRACTION));
sum += term;
term = mult_q(term, div_q(x, 3 << PSC_Q_FRACTION));
sum += term;
term = mult_q(term, div_q(x, 4 << PSC_Q_FRACTION));
sum += term;
return sum;
}
/**
* dcss_scaler_gaussian_filter() - Generate gaussian prototype filter.
* @fc_q: fixed-point cutoff frequency normalized to range [0, 1]
* @use_5_taps: indicates whether to use 5 taps or 7 taps
* @coef: output filter coefficients
*/
static void dcss_scaler_gaussian_filter(int fc_q, bool use_5_taps,
bool phase0_identity,
int coef[][PSC_NUM_TAPS])
{
int sigma_q, g0_q, g1_q, g2_q;
int tap_cnt1, tap_cnt2, tap_idx, phase_cnt;
int mid;
int phase;
int i;
int taps;
if (use_5_taps)
for (phase = 0; phase < PSC_STORED_PHASES; phase++) {
coef[phase][0] = 0;
coef[phase][PSC_NUM_TAPS - 1] = 0;
}
/* seed coefficient scanner */
taps = use_5_taps ? PSC_NUM_TAPS_RGBA : PSC_NUM_TAPS;
mid = (PSC_NUM_PHASES * taps) / 2 - 1;
phase_cnt = (PSC_NUM_PHASES * (PSC_NUM_TAPS + 1)) / 2;
tap_cnt1 = (PSC_NUM_PHASES * PSC_NUM_TAPS) / 2;
tap_cnt2 = (PSC_NUM_PHASES * PSC_NUM_TAPS) / 2;
/* seed gaussian filter generator */
sigma_q = div_q(PSC_Q_ROUND_OFFSET, fc_q);
g0_q = 1 << PSC_Q_FRACTION;
g1_q = exp_approx_q(div_q(-PSC_Q_ROUND_OFFSET,
mult_q(sigma_q, sigma_q)));
g2_q = mult_q(g1_q, g1_q);
coef[phase_cnt & PSC_PHASE_MASK][tap_cnt1 >> PSC_BITS_FOR_PHASE] = g0_q;
for (i = 0; i < mid; i++) {
phase_cnt++;
tap_cnt1--;
tap_cnt2++;
g0_q = mult_q(g0_q, g1_q);
g1_q = mult_q(g1_q, g2_q);
if ((phase_cnt & PSC_PHASE_MASK) <= 8) {
tap_idx = tap_cnt1 >> PSC_BITS_FOR_PHASE;
coef[phase_cnt & PSC_PHASE_MASK][tap_idx] = g0_q;
}
if (((-phase_cnt) & PSC_PHASE_MASK) <= 8) {
tap_idx = tap_cnt2 >> PSC_BITS_FOR_PHASE;
coef[(-phase_cnt) & PSC_PHASE_MASK][tap_idx] = g0_q;
}
}
phase_cnt++;
tap_cnt1--;
coef[phase_cnt & PSC_PHASE_MASK][tap_cnt1 >> PSC_BITS_FOR_PHASE] = 0;
/* override phase 0 with identity filter if specified */
if (phase0_identity)
for (i = 0; i < PSC_NUM_TAPS; i++)
coef[0][i] = i == (PSC_NUM_TAPS >> 1) ?
(1 << PSC_COEFF_PRECISION) : 0;
/* normalize coef */
for (phase = 0; phase < PSC_STORED_PHASES; phase++) {
int sum = 0;
s64 ll_temp;
for (i = 0; i < PSC_NUM_TAPS; i++)
sum += coef[phase][i];
for (i = 0; i < PSC_NUM_TAPS; i++) {
ll_temp = coef[phase][i];
ll_temp <<= PSC_COEFF_PRECISION;
ll_temp += sum >> 1;
ll_temp /= sum;
coef[phase][i] = (int)ll_temp;
}
}
}
/**
* dcss_scaler_filter_design() - Compute filter coefficients using
* Gaussian filter.
* @src_length: length of input
* @dst_length: length of output
* @use_5_taps: 0 for 7 taps per phase, 1 for 5 taps
* @coef: output coefficients
*/
static void dcss_scaler_filter_design(int src_length, int dst_length,
bool use_5_taps, bool phase0_identity,
int coef[][PSC_NUM_TAPS])
{
int fc_q;
/* compute cutoff frequency */
if (dst_length >= src_length)
fc_q = div_q(1, PSC_NUM_PHASES);
else
fc_q = div_q(dst_length, src_length * PSC_NUM_PHASES);
/* compute gaussian filter coefficients */
dcss_scaler_gaussian_filter(fc_q, use_5_taps, phase0_identity, coef);
}
static void dcss_scaler_write(struct dcss_scaler_ch *ch, u32 val, u32 ofs)
{
struct dcss_scaler *scl = ch->scl;
dcss_ctxld_write(scl->ctxld, scl->ctx_id, val, ch->base_ofs + ofs);
}
static int dcss_scaler_ch_init_all(struct dcss_scaler *scl,
unsigned long scaler_base)
{
struct dcss_scaler_ch *ch;
int i;
for (i = 0; i < 3; i++) {
ch = &scl->ch[i];
ch->base_ofs = scaler_base + i * 0x400;
ch->base_reg = ioremap(ch->base_ofs, SZ_4K);
if (!ch->base_reg) {
dev_err(scl->dev, "scaler: unable to remap ch base\n");
return -ENOMEM;
}
ch->scl = scl;
}
return 0;
}
int dcss_scaler_init(struct dcss_dev *dcss, unsigned long scaler_base)
{
struct dcss_scaler *scaler;
scaler = kzalloc(sizeof(*scaler), GFP_KERNEL);
if (!scaler)
return -ENOMEM;
dcss->scaler = scaler;
scaler->dev = dcss->dev;
scaler->ctxld = dcss->ctxld;
scaler->ctx_id = CTX_SB_HP;
if (dcss_scaler_ch_init_all(scaler, scaler_base)) {
int i;
for (i = 0; i < 3; i++) {
if (scaler->ch[i].base_reg)
iounmap(scaler->ch[i].base_reg);
}
kfree(scaler);
return -ENOMEM;
}
return 0;
}
void dcss_scaler_exit(struct dcss_scaler *scl)
{
int ch_no;
for (ch_no = 0; ch_no < 3; ch_no++) {
struct dcss_scaler_ch *ch = &scl->ch[ch_no];
dcss_writel(0, ch->base_reg + DCSS_SCALER_CTRL);
if (ch->base_reg)
iounmap(ch->base_reg);
}
kfree(scl);
}
void dcss_scaler_ch_enable(struct dcss_scaler *scl, int ch_num, bool en)
{
struct dcss_scaler_ch *ch = &scl->ch[ch_num];
u32 scaler_ctrl;
scaler_ctrl = en ? SCALER_EN | REPEAT_EN : 0;
if (en)
dcss_scaler_write(ch, ch->sdata_ctrl, DCSS_SCALER_SDATA_CTRL);
if (ch->scaler_ctrl != scaler_ctrl)
ch->scaler_ctrl_chgd = true;
ch->scaler_ctrl = scaler_ctrl;
}
static void dcss_scaler_yuv_enable(struct dcss_scaler_ch *ch, bool en)
{
ch->sdata_ctrl &= ~YUV_EN;
ch->sdata_ctrl |= en ? YUV_EN : 0;
}
static void dcss_scaler_rtr_8lines_enable(struct dcss_scaler_ch *ch, bool en)
{
ch->sdata_ctrl &= ~RTRAM_8LINES;
ch->sdata_ctrl |= en ? RTRAM_8LINES : 0;
}
static void dcss_scaler_bit_depth_set(struct dcss_scaler_ch *ch, int depth)
{
u32 val;
val = depth == 30 ? 2 : 0;
dcss_scaler_write(ch,
((val << CHR_BIT_DEPTH_POS) & CHR_BIT_DEPTH_MASK) |
((val << LUM_BIT_DEPTH_POS) & LUM_BIT_DEPTH_MASK),
DCSS_SCALER_BIT_DEPTH);
}
enum buffer_format {
BUF_FMT_YUV420,
BUF_FMT_YUV422,
BUF_FMT_ARGB8888_YUV444,
};
enum chroma_location {
PSC_LOC_HORZ_0_VERT_1_OVER_4 = 0,
PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_4 = 1,
PSC_LOC_HORZ_0_VERT_0 = 2,
PSC_LOC_HORZ_1_OVER_4_VERT_0 = 3,
PSC_LOC_HORZ_0_VERT_1_OVER_2 = 4,
PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_2 = 5
};
static void dcss_scaler_format_set(struct dcss_scaler_ch *ch,
enum buffer_format src_fmt,
enum buffer_format dst_fmt)
{
dcss_scaler_write(ch, src_fmt, DCSS_SCALER_SRC_FORMAT);
dcss_scaler_write(ch, dst_fmt, DCSS_SCALER_DST_FORMAT);
}
static void dcss_scaler_res_set(struct dcss_scaler_ch *ch,
int src_xres, int src_yres,
int dst_xres, int dst_yres,
u32 pix_format, enum buffer_format dst_format)
{
u32 lsrc_xres, lsrc_yres, csrc_xres, csrc_yres;
u32 ldst_xres, ldst_yres, cdst_xres, cdst_yres;
bool src_is_444 = true;
lsrc_xres = src_xres;
csrc_xres = src_xres;
lsrc_yres = src_yres;
csrc_yres = src_yres;
ldst_xres = dst_xres;
cdst_xres = dst_xres;
ldst_yres = dst_yres;
cdst_yres = dst_yres;
if (pix_format == DRM_FORMAT_UYVY || pix_format == DRM_FORMAT_VYUY ||
pix_format == DRM_FORMAT_YUYV || pix_format == DRM_FORMAT_YVYU) {
csrc_xres >>= 1;
src_is_444 = false;
} else if (pix_format == DRM_FORMAT_NV12 ||
pix_format == DRM_FORMAT_NV21) {
csrc_xres >>= 1;
csrc_yres >>= 1;
src_is_444 = false;
}
if (dst_format == BUF_FMT_YUV422)
cdst_xres >>= 1;
/* for 4:4:4 to 4:2:2 conversion, source height should be 1 less */
if (src_is_444 && dst_format == BUF_FMT_YUV422) {
lsrc_yres--;
csrc_yres--;
}
dcss_scaler_write(ch, (((lsrc_yres - 1) << HEIGHT_POS) & HEIGHT_MASK) |
(((lsrc_xres - 1) << WIDTH_POS) & WIDTH_MASK),
DCSS_SCALER_SRC_LUM_RES);
dcss_scaler_write(ch, (((csrc_yres - 1) << HEIGHT_POS) & HEIGHT_MASK) |
(((csrc_xres - 1) << WIDTH_POS) & WIDTH_MASK),
DCSS_SCALER_SRC_CHR_RES);
dcss_scaler_write(ch, (((ldst_yres - 1) << HEIGHT_POS) & HEIGHT_MASK) |
(((ldst_xres - 1) << WIDTH_POS) & WIDTH_MASK),
DCSS_SCALER_DST_LUM_RES);
dcss_scaler_write(ch, (((cdst_yres - 1) << HEIGHT_POS) & HEIGHT_MASK) |
(((cdst_xres - 1) << WIDTH_POS) & WIDTH_MASK),
DCSS_SCALER_DST_CHR_RES);
}
#define downscale_fp(factor, fp_pos) ((factor) << (fp_pos))
#define upscale_fp(factor, fp_pos) ((1 << (fp_pos)) / (factor))
struct dcss_scaler_factors {
int downscale;
int upscale;
};
static const struct dcss_scaler_factors dcss_scaler_factors[] = {
{3, 8}, {5, 8}, {5, 8},
};
static void dcss_scaler_fractions_set(struct dcss_scaler_ch *ch,
int src_xres, int src_yres,
int dst_xres, int dst_yres,
u32 src_format, u32 dst_format,
enum chroma_location src_chroma_loc)
{
int src_c_xres, src_c_yres, dst_c_xres, dst_c_yres;
u32 l_vinc, l_hinc, c_vinc, c_hinc;
u32 c_vstart, c_hstart;
src_c_xres = src_xres;
src_c_yres = src_yres;
dst_c_xres = dst_xres;
dst_c_yres = dst_yres;
c_vstart = 0;
c_hstart = 0;
/* adjustments for source chroma location */
if (src_format == BUF_FMT_YUV420) {
/* vertical input chroma position adjustment */
switch (src_chroma_loc) {
case PSC_LOC_HORZ_0_VERT_1_OVER_4:
case PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_4:
/*
* move chroma up to first luma line
* (1/4 chroma input line spacing)
*/
c_vstart -= (1 << (PSC_PHASE_FRACTION_BITS - 2));
break;
case PSC_LOC_HORZ_0_VERT_1_OVER_2:
case PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_2:
/*
* move chroma up to first luma line
* (1/2 chroma input line spacing)
*/
c_vstart -= (1 << (PSC_PHASE_FRACTION_BITS - 1));
break;
default:
break;
}
/* horizontal input chroma position adjustment */
switch (src_chroma_loc) {
case PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_4:
case PSC_LOC_HORZ_1_OVER_4_VERT_0:
case PSC_LOC_HORZ_1_OVER_4_VERT_1_OVER_2:
/* move chroma left 1/4 chroma input sample spacing */
c_hstart -= (1 << (PSC_PHASE_FRACTION_BITS - 2));
break;
default:
break;
}
}
/* adjustments to chroma resolution */
if (src_format == BUF_FMT_YUV420) {
src_c_xres >>= 1;
src_c_yres >>= 1;
} else if (src_format == BUF_FMT_YUV422) {
src_c_xres >>= 1;
}
if (dst_format == BUF_FMT_YUV422)
dst_c_xres >>= 1;
l_vinc = ((src_yres << 13) + (dst_yres >> 1)) / dst_yres;
c_vinc = ((src_c_yres << 13) + (dst_c_yres >> 1)) / dst_c_yres;
l_hinc = ((src_xres << 13) + (dst_xres >> 1)) / dst_xres;
c_hinc = ((src_c_xres << 13) + (dst_c_xres >> 1)) / dst_c_xres;
/* save chroma start phase */
ch->c_vstart = c_vstart;
ch->c_hstart = c_hstart;
dcss_scaler_write(ch, 0, DCSS_SCALER_V_LUM_START);
dcss_scaler_write(ch, l_vinc, DCSS_SCALER_V_LUM_INC);
dcss_scaler_write(ch, 0, DCSS_SCALER_H_LUM_START);
dcss_scaler_write(ch, l_hinc, DCSS_SCALER_H_LUM_INC);
dcss_scaler_write(ch, c_vstart, DCSS_SCALER_V_CHR_START);
dcss_scaler_write(ch, c_vinc, DCSS_SCALER_V_CHR_INC);
dcss_scaler_write(ch, c_hstart, DCSS_SCALER_H_CHR_START);
dcss_scaler_write(ch, c_hinc, DCSS_SCALER_H_CHR_INC);
}
int dcss_scaler_get_min_max_ratios(struct dcss_scaler *scl, int ch_num,
int *min, int *max)
{
*min = upscale_fp(dcss_scaler_factors[ch_num].upscale, 16);
*max = downscale_fp(dcss_scaler_factors[ch_num].downscale, 16);
return 0;
}
static void dcss_scaler_program_5_coef_set(struct dcss_scaler_ch *ch,
int base_addr,
int coef[][PSC_NUM_TAPS])
{
int i, phase;
for (i = 0; i < PSC_STORED_PHASES; i++) {
dcss_scaler_write(ch, ((coef[i][1] & 0xfff) << 16 |
(coef[i][2] & 0xfff) << 4 |
(coef[i][3] & 0xf00) >> 8),
base_addr + i * sizeof(u32));
dcss_scaler_write(ch, ((coef[i][3] & 0x0ff) << 20 |
(coef[i][4] & 0xfff) << 8 |
(coef[i][5] & 0xff0) >> 4),
base_addr + 0x40 + i * sizeof(u32));
dcss_scaler_write(ch, ((coef[i][5] & 0x00f) << 24),
base_addr + 0x80 + i * sizeof(u32));
}
/* reverse both phase and tap orderings */
for (phase = (PSC_NUM_PHASES >> 1) - 1;
i < PSC_NUM_PHASES; i++, phase--) {
dcss_scaler_write(ch, ((coef[phase][5] & 0xfff) << 16 |
(coef[phase][4] & 0xfff) << 4 |
(coef[phase][3] & 0xf00) >> 8),
base_addr + i * sizeof(u32));
dcss_scaler_write(ch, ((coef[phase][3] & 0x0ff) << 20 |
(coef[phase][2] & 0xfff) << 8 |
(coef[phase][1] & 0xff0) >> 4),
base_addr + 0x40 + i * sizeof(u32));
dcss_scaler_write(ch, ((coef[phase][1] & 0x00f) << 24),
base_addr + 0x80 + i * sizeof(u32));
}
}
static void dcss_scaler_program_7_coef_set(struct dcss_scaler_ch *ch,
int base_addr,
int coef[][PSC_NUM_TAPS])
{
int i, phase;
for (i = 0; i < PSC_STORED_PHASES; i++) {
dcss_scaler_write(ch, ((coef[i][0] & 0xfff) << 16 |
(coef[i][1] & 0xfff) << 4 |
(coef[i][2] & 0xf00) >> 8),
base_addr + i * sizeof(u32));
dcss_scaler_write(ch, ((coef[i][2] & 0x0ff) << 20 |
(coef[i][3] & 0xfff) << 8 |
(coef[i][4] & 0xff0) >> 4),
base_addr + 0x40 + i * sizeof(u32));
dcss_scaler_write(ch, ((coef[i][4] & 0x00f) << 24 |
(coef[i][5] & 0xfff) << 12 |
(coef[i][6] & 0xfff)),
base_addr + 0x80 + i * sizeof(u32));
}
/* reverse both phase and tap orderings */
for (phase = (PSC_NUM_PHASES >> 1) - 1;
i < PSC_NUM_PHASES; i++, phase--) {
dcss_scaler_write(ch, ((coef[phase][6] & 0xfff) << 16 |
(coef[phase][5] & 0xfff) << 4 |
(coef[phase][4] & 0xf00) >> 8),
base_addr + i * sizeof(u32));
dcss_scaler_write(ch, ((coef[phase][4] & 0x0ff) << 20 |
(coef[phase][3] & 0xfff) << 8 |
(coef[phase][2] & 0xff0) >> 4),
base_addr + 0x40 + i * sizeof(u32));
dcss_scaler_write(ch, ((coef[phase][2] & 0x00f) << 24 |
(coef[phase][1] & 0xfff) << 12 |
(coef[phase][0] & 0xfff)),
base_addr + 0x80 + i * sizeof(u32));
}
}
static void dcss_scaler_yuv_coef_set(struct dcss_scaler_ch *ch,
enum buffer_format src_format,
enum buffer_format dst_format,
bool use_5_taps,
int src_xres, int src_yres, int dst_xres,
int dst_yres)
{
int coef[PSC_STORED_PHASES][PSC_NUM_TAPS];
bool program_5_taps = use_5_taps ||
(dst_format == BUF_FMT_YUV422 &&
src_format == BUF_FMT_ARGB8888_YUV444);
/* horizontal luma */
dcss_scaler_filter_design(src_xres, dst_xres, false,
src_xres == dst_xres, coef);
dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_HLUM, coef);
/* vertical luma */
dcss_scaler_filter_design(src_yres, dst_yres, program_5_taps,
src_yres == dst_yres, coef);
if (program_5_taps)
dcss_scaler_program_5_coef_set(ch, DCSS_SCALER_COEF_VLUM, coef);
else
dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_VLUM, coef);
/* adjust chroma resolution */
if (src_format != BUF_FMT_ARGB8888_YUV444)
src_xres >>= 1;
if (src_format == BUF_FMT_YUV420)
src_yres >>= 1;
if (dst_format != BUF_FMT_ARGB8888_YUV444)
dst_xres >>= 1;
if (dst_format == BUF_FMT_YUV420) /* should not happen */
dst_yres >>= 1;
/* horizontal chroma */
dcss_scaler_filter_design(src_xres, dst_xres, false,
(src_xres == dst_xres) && (ch->c_hstart == 0),
coef);
dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_HCHR, coef);
/* vertical chroma */
dcss_scaler_filter_design(src_yres, dst_yres, program_5_taps,
(src_yres == dst_yres) && (ch->c_vstart == 0),
coef);
if (program_5_taps)
dcss_scaler_program_5_coef_set(ch, DCSS_SCALER_COEF_VCHR, coef);
else
dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_VCHR, coef);
}
static void dcss_scaler_rgb_coef_set(struct dcss_scaler_ch *ch,
int src_xres, int src_yres, int dst_xres,
int dst_yres)
{
int coef[PSC_STORED_PHASES][PSC_NUM_TAPS];
/* horizontal RGB */
dcss_scaler_filter_design(src_xres, dst_xres, false,
src_xres == dst_xres, coef);
dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_HLUM, coef);
/* vertical RGB */
dcss_scaler_filter_design(src_yres, dst_yres, false,
src_yres == dst_yres, coef);
dcss_scaler_program_7_coef_set(ch, DCSS_SCALER_COEF_VLUM, coef);
}
static void dcss_scaler_set_rgb10_order(struct dcss_scaler_ch *ch,
const struct drm_format_info *format)
{
u32 a2r10g10b10_format;
if (format->is_yuv)
return;
ch->sdata_ctrl &= ~A2R10G10B10_FORMAT_MASK;
if (format->depth != 30)
return;
switch (format->format) {
case DRM_FORMAT_ARGB2101010:
case DRM_FORMAT_XRGB2101010:
a2r10g10b10_format = 0;
break;
case DRM_FORMAT_ABGR2101010:
case DRM_FORMAT_XBGR2101010:
a2r10g10b10_format = 5;
break;
case DRM_FORMAT_RGBA1010102:
case DRM_FORMAT_RGBX1010102:
a2r10g10b10_format = 6;
break;
case DRM_FORMAT_BGRA1010102:
case DRM_FORMAT_BGRX1010102:
a2r10g10b10_format = 11;
break;
default:
a2r10g10b10_format = 0;
break;
}
ch->sdata_ctrl |= a2r10g10b10_format << A2R10G10B10_FORMAT_POS;
}
void dcss_scaler_setup(struct dcss_scaler *scl, int ch_num,
const struct drm_format_info *format,
int src_xres, int src_yres, int dst_xres, int dst_yres,
u32 vrefresh_hz)
{
struct dcss_scaler_ch *ch = &scl->ch[ch_num];
unsigned int pixel_depth = 0;
bool rtr_8line_en = false;
bool use_5_taps = false;
enum buffer_format src_format = BUF_FMT_ARGB8888_YUV444;
enum buffer_format dst_format = BUF_FMT_ARGB8888_YUV444;
u32 pix_format = format->format;
if (format->is_yuv) {
dcss_scaler_yuv_enable(ch, true);
if (pix_format == DRM_FORMAT_NV12 ||
pix_format == DRM_FORMAT_NV21) {
rtr_8line_en = true;
src_format = BUF_FMT_YUV420;
} else if (pix_format == DRM_FORMAT_UYVY ||
pix_format == DRM_FORMAT_VYUY ||
pix_format == DRM_FORMAT_YUYV ||
pix_format == DRM_FORMAT_YVYU) {
src_format = BUF_FMT_YUV422;
}
use_5_taps = !rtr_8line_en;
} else {
dcss_scaler_yuv_enable(ch, false);
pixel_depth = format->depth;
}
dcss_scaler_fractions_set(ch, src_xres, src_yres, dst_xres,
dst_yres, src_format, dst_format,
PSC_LOC_HORZ_0_VERT_1_OVER_4);
if (format->is_yuv)
dcss_scaler_yuv_coef_set(ch, src_format, dst_format,
use_5_taps, src_xres, src_yres,
dst_xres, dst_yres);
else
dcss_scaler_rgb_coef_set(ch, src_xres, src_yres,
dst_xres, dst_yres);
dcss_scaler_rtr_8lines_enable(ch, rtr_8line_en);
dcss_scaler_bit_depth_set(ch, pixel_depth);
dcss_scaler_set_rgb10_order(ch, format);
dcss_scaler_format_set(ch, src_format, dst_format);
dcss_scaler_res_set(ch, src_xres, src_yres, dst_xres, dst_yres,
pix_format, dst_format);
}
/* This function will be called from interrupt context. */
void dcss_scaler_write_sclctrl(struct dcss_scaler *scl)
{
int chnum;
dcss_ctxld_assert_locked(scl->ctxld);
for (chnum = 0; chnum < 3; chnum++) {
struct dcss_scaler_ch *ch = &scl->ch[chnum];
if (ch->scaler_ctrl_chgd) {
dcss_ctxld_write_irqsafe(scl->ctxld, scl->ctx_id,
ch->scaler_ctrl,
ch->base_ofs +
DCSS_SCALER_CTRL);
ch->scaler_ctrl_chgd = false;
}
}
}

180
drivers/gpu/drm/imx/dcss/dcss-ss.c Normal file
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@ -0,0 +1,180 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 NXP.
*/
#include <linux/device.h>
#include <linux/slab.h>
#include "dcss-dev.h"
#define DCSS_SS_SYS_CTRL 0x00
#define RUN_EN BIT(0)
#define DCSS_SS_DISPLAY 0x10
#define LRC_X_POS 0
#define LRC_X_MASK GENMASK(12, 0)
#define LRC_Y_POS 16
#define LRC_Y_MASK GENMASK(28, 16)
#define DCSS_SS_HSYNC 0x20
#define DCSS_SS_VSYNC 0x30
#define SYNC_START_POS 0
#define SYNC_START_MASK GENMASK(12, 0)
#define SYNC_END_POS 16
#define SYNC_END_MASK GENMASK(28, 16)
#define SYNC_POL BIT(31)
#define DCSS_SS_DE_ULC 0x40
#define ULC_X_POS 0
#define ULC_X_MASK GENMASK(12, 0)
#define ULC_Y_POS 16
#define ULC_Y_MASK GENMASK(28, 16)
#define ULC_POL BIT(31)
#define DCSS_SS_DE_LRC 0x50
#define DCSS_SS_MODE 0x60
#define PIPE_MODE_POS 0
#define PIPE_MODE_MASK GENMASK(1, 0)
#define DCSS_SS_COEFF 0x70
#define HORIZ_A_POS 0
#define HORIZ_A_MASK GENMASK(3, 0)
#define HORIZ_B_POS 4
#define HORIZ_B_MASK GENMASK(7, 4)
#define HORIZ_C_POS 8
#define HORIZ_C_MASK GENMASK(11, 8)
#define HORIZ_H_NORM_POS 12
#define HORIZ_H_NORM_MASK GENMASK(14, 12)
#define VERT_A_POS 16
#define VERT_A_MASK GENMASK(19, 16)
#define VERT_B_POS 20
#define VERT_B_MASK GENMASK(23, 20)
#define VERT_C_POS 24
#define VERT_C_MASK GENMASK(27, 24)
#define VERT_H_NORM_POS 28
#define VERT_H_NORM_MASK GENMASK(30, 28)
#define DCSS_SS_CLIP_CB 0x80
#define DCSS_SS_CLIP_CR 0x90
#define CLIP_MIN_POS 0
#define CLIP_MIN_MASK GENMASK(9, 0)
#define CLIP_MAX_POS 0
#define CLIP_MAX_MASK GENMASK(23, 16)
#define DCSS_SS_INTER_MODE 0xA0
#define INT_EN BIT(0)
#define VSYNC_SHIFT BIT(1)
struct dcss_ss {
struct device *dev;
void __iomem *base_reg;
u32 base_ofs;
struct dcss_ctxld *ctxld;
u32 ctx_id;
bool in_use;
};
static void dcss_ss_write(struct dcss_ss *ss, u32 val, u32 ofs)
{
if (!ss->in_use)
dcss_writel(val, ss->base_reg + ofs);
dcss_ctxld_write(ss->ctxld, ss->ctx_id, val,
ss->base_ofs + ofs);
}
int dcss_ss_init(struct dcss_dev *dcss, unsigned long ss_base)
{
struct dcss_ss *ss;
ss = kzalloc(sizeof(*ss), GFP_KERNEL);
if (!ss)
return -ENOMEM;
dcss->ss = ss;
ss->dev = dcss->dev;
ss->ctxld = dcss->ctxld;
ss->base_reg = ioremap(ss_base, SZ_4K);
if (!ss->base_reg) {
dev_err(dcss->dev, "ss: unable to remap ss base\n");
kfree(ss);
return -ENOMEM;
}
ss->base_ofs = ss_base;
ss->ctx_id = CTX_SB_HP;
return 0;
}
void dcss_ss_exit(struct dcss_ss *ss)
{
/* stop SS */
dcss_writel(0, ss->base_reg + DCSS_SS_SYS_CTRL);
if (ss->base_reg)
iounmap(ss->base_reg);
kfree(ss);
}
void dcss_ss_subsam_set(struct dcss_ss *ss)
{
dcss_ss_write(ss, 0x41614161, DCSS_SS_COEFF);
dcss_ss_write(ss, 0, DCSS_SS_MODE);
dcss_ss_write(ss, 0x03ff0000, DCSS_SS_CLIP_CB);
dcss_ss_write(ss, 0x03ff0000, DCSS_SS_CLIP_CR);
}
void dcss_ss_sync_set(struct dcss_ss *ss, struct videomode *vm,
bool phsync, bool pvsync)
{
u16 lrc_x, lrc_y;
u16 hsync_start, hsync_end;
u16 vsync_start, vsync_end;
u16 de_ulc_x, de_ulc_y;
u16 de_lrc_x, de_lrc_y;
lrc_x = vm->hfront_porch + vm->hback_porch + vm->hsync_len +
vm->hactive - 1;
lrc_y = vm->vfront_porch + vm->vback_porch + vm->vsync_len +
vm->vactive - 1;
dcss_ss_write(ss, (lrc_y << LRC_Y_POS) | lrc_x, DCSS_SS_DISPLAY);
hsync_start = vm->hfront_porch + vm->hback_porch + vm->hsync_len +
vm->hactive - 1;
hsync_end = vm->hsync_len - 1;
dcss_ss_write(ss, (phsync ? SYNC_POL : 0) |
((u32)hsync_end << SYNC_END_POS) | hsync_start,
DCSS_SS_HSYNC);
vsync_start = vm->vfront_porch - 1;
vsync_end = vm->vfront_porch + vm->vsync_len - 1;
dcss_ss_write(ss, (pvsync ? SYNC_POL : 0) |
((u32)vsync_end << SYNC_END_POS) | vsync_start,
DCSS_SS_VSYNC);
de_ulc_x = vm->hsync_len + vm->hback_porch - 1;
de_ulc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch;
dcss_ss_write(ss, SYNC_POL | ((u32)de_ulc_y << ULC_Y_POS) | de_ulc_x,
DCSS_SS_DE_ULC);
de_lrc_x = vm->hsync_len + vm->hback_porch + vm->hactive - 1;
de_lrc_y = vm->vsync_len + vm->vfront_porch + vm->vback_porch +
vm->vactive - 1;
dcss_ss_write(ss, (de_lrc_y << LRC_Y_POS) | de_lrc_x, DCSS_SS_DE_LRC);
}
void dcss_ss_enable(struct dcss_ss *ss)
{
dcss_ss_write(ss, RUN_EN, DCSS_SS_SYS_CTRL);
ss->in_use = true;
}
void dcss_ss_shutoff(struct dcss_ss *ss)
{
dcss_writel(0, ss->base_reg + DCSS_SS_SYS_CTRL);
ss->in_use = false;
}