linux_dsm_epyc7002/drivers/gpu/drm/arc/arcpgu_crtc.c
Eugeniy Paltsev 491b14b9ba DRM: ARC: PGU: cleanup supported format list code
Get rid of 'simplefb_format' structure usage as we only use its
'fourcc' field.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2019-12-16 13:53:05 +03:00

238 lines
6.8 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* ARC PGU DRM driver.
*
* Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_device.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_vblank.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_probe_helper.h>
#include <linux/clk.h>
#include <linux/platform_data/simplefb.h>
#include "arcpgu.h"
#include "arcpgu_regs.h"
#define ENCODE_PGU_XY(x, y) ((((x) - 1) << 16) | ((y) - 1))
static const u32 arc_pgu_supported_formats[] = {
DRM_FORMAT_RGB565,
DRM_FORMAT_RGB888,
};
static void arc_pgu_set_pxl_fmt(struct drm_crtc *crtc)
{
struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc);
const struct drm_framebuffer *fb = crtc->primary->state->fb;
uint32_t pixel_format = fb->format->format;
u32 format = DRM_FORMAT_INVALID;
int i;
u32 reg_ctrl;
for (i = 0; i < ARRAY_SIZE(arc_pgu_supported_formats); i++) {
if (arc_pgu_supported_formats[i] == pixel_format)
format = arc_pgu_supported_formats[i];
}
if (WARN_ON(format == DRM_FORMAT_INVALID))
return;
reg_ctrl = arc_pgu_read(arcpgu, ARCPGU_REG_CTRL);
if (format == DRM_FORMAT_RGB565)
reg_ctrl &= ~ARCPGU_MODE_RGB888_MASK;
else
reg_ctrl |= ARCPGU_MODE_RGB888_MASK;
arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, reg_ctrl);
}
static const struct drm_crtc_funcs arc_pgu_crtc_funcs = {
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.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,
};
static enum drm_mode_status arc_pgu_crtc_mode_valid(struct drm_crtc *crtc,
const struct drm_display_mode *mode)
{
struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc);
long rate, clk_rate = mode->clock * 1000;
long diff = clk_rate / 200; /* +-0.5% allowed by HDMI spec */
rate = clk_round_rate(arcpgu->clk, clk_rate);
if ((max(rate, clk_rate) - min(rate, clk_rate) < diff) && (rate > 0))
return MODE_OK;
return MODE_NOCLOCK;
}
static void arc_pgu_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc);
struct drm_display_mode *m = &crtc->state->adjusted_mode;
u32 val;
arc_pgu_write(arcpgu, ARCPGU_REG_FMT,
ENCODE_PGU_XY(m->crtc_htotal, m->crtc_vtotal));
arc_pgu_write(arcpgu, ARCPGU_REG_HSYNC,
ENCODE_PGU_XY(m->crtc_hsync_start - m->crtc_hdisplay,
m->crtc_hsync_end - m->crtc_hdisplay));
arc_pgu_write(arcpgu, ARCPGU_REG_VSYNC,
ENCODE_PGU_XY(m->crtc_vsync_start - m->crtc_vdisplay,
m->crtc_vsync_end - m->crtc_vdisplay));
arc_pgu_write(arcpgu, ARCPGU_REG_ACTIVE,
ENCODE_PGU_XY(m->crtc_hblank_end - m->crtc_hblank_start,
m->crtc_vblank_end - m->crtc_vblank_start));
val = arc_pgu_read(arcpgu, ARCPGU_REG_CTRL);
if (m->flags & DRM_MODE_FLAG_PVSYNC)
val |= ARCPGU_CTRL_VS_POL_MASK << ARCPGU_CTRL_VS_POL_OFST;
else
val &= ~(ARCPGU_CTRL_VS_POL_MASK << ARCPGU_CTRL_VS_POL_OFST);
if (m->flags & DRM_MODE_FLAG_PHSYNC)
val |= ARCPGU_CTRL_HS_POL_MASK << ARCPGU_CTRL_HS_POL_OFST;
else
val &= ~(ARCPGU_CTRL_HS_POL_MASK << ARCPGU_CTRL_HS_POL_OFST);
arc_pgu_write(arcpgu, ARCPGU_REG_CTRL, val);
arc_pgu_write(arcpgu, ARCPGU_REG_STRIDE, 0);
arc_pgu_write(arcpgu, ARCPGU_REG_START_SET, 1);
arc_pgu_set_pxl_fmt(crtc);
clk_set_rate(arcpgu->clk, m->crtc_clock * 1000);
}
static void arc_pgu_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc);
clk_prepare_enable(arcpgu->clk);
arc_pgu_write(arcpgu, ARCPGU_REG_CTRL,
arc_pgu_read(arcpgu, ARCPGU_REG_CTRL) |
ARCPGU_CTRL_ENABLE_MASK);
}
static void arc_pgu_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct arcpgu_drm_private *arcpgu = crtc_to_arcpgu_priv(crtc);
clk_disable_unprepare(arcpgu->clk);
arc_pgu_write(arcpgu, ARCPGU_REG_CTRL,
arc_pgu_read(arcpgu, ARCPGU_REG_CTRL) &
~ARCPGU_CTRL_ENABLE_MASK);
}
static void arc_pgu_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
struct drm_pending_vblank_event *event = crtc->state->event;
if (event) {
crtc->state->event = NULL;
spin_lock_irq(&crtc->dev->event_lock);
drm_crtc_send_vblank_event(crtc, event);
spin_unlock_irq(&crtc->dev->event_lock);
}
}
static const struct drm_crtc_helper_funcs arc_pgu_crtc_helper_funcs = {
.mode_valid = arc_pgu_crtc_mode_valid,
.mode_set_nofb = arc_pgu_crtc_mode_set_nofb,
.atomic_begin = arc_pgu_crtc_atomic_begin,
.atomic_enable = arc_pgu_crtc_atomic_enable,
.atomic_disable = arc_pgu_crtc_atomic_disable,
};
static void arc_pgu_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *state)
{
struct arcpgu_drm_private *arcpgu;
struct drm_gem_cma_object *gem;
if (!plane->state->crtc || !plane->state->fb)
return;
arcpgu = crtc_to_arcpgu_priv(plane->state->crtc);
gem = drm_fb_cma_get_gem_obj(plane->state->fb, 0);
arc_pgu_write(arcpgu, ARCPGU_REG_BUF0_ADDR, gem->paddr);
}
static const struct drm_plane_helper_funcs arc_pgu_plane_helper_funcs = {
.atomic_update = arc_pgu_plane_atomic_update,
};
static void arc_pgu_plane_destroy(struct drm_plane *plane)
{
drm_plane_cleanup(plane);
}
static const struct drm_plane_funcs arc_pgu_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = arc_pgu_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,
};
static struct drm_plane *arc_pgu_plane_init(struct drm_device *drm)
{
struct arcpgu_drm_private *arcpgu = drm->dev_private;
struct drm_plane *plane = NULL;
int ret;
plane = devm_kzalloc(drm->dev, sizeof(*plane), GFP_KERNEL);
if (!plane)
return ERR_PTR(-ENOMEM);
ret = drm_universal_plane_init(drm, plane, 0xff, &arc_pgu_plane_funcs,
arc_pgu_supported_formats,
ARRAY_SIZE(arc_pgu_supported_formats),
NULL,
DRM_PLANE_TYPE_PRIMARY, NULL);
if (ret)
return ERR_PTR(ret);
drm_plane_helper_add(plane, &arc_pgu_plane_helper_funcs);
arcpgu->plane = plane;
return plane;
}
int arc_pgu_setup_crtc(struct drm_device *drm)
{
struct arcpgu_drm_private *arcpgu = drm->dev_private;
struct drm_plane *primary;
int ret;
primary = arc_pgu_plane_init(drm);
if (IS_ERR(primary))
return PTR_ERR(primary);
ret = drm_crtc_init_with_planes(drm, &arcpgu->crtc, primary, NULL,
&arc_pgu_crtc_funcs, NULL);
if (ret) {
arc_pgu_plane_destroy(primary);
return ret;
}
drm_crtc_helper_add(&arcpgu->crtc, &arc_pgu_crtc_helper_funcs);
return 0;
}