AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
Sam Ravnborg 83d4ed8634 drm/panel: rocktech-jh057n00900: use drm_panel backlight support 
Use the backlight support in drm_panel to simplify the driver.
While touching the include files sort them
and divide them up in blocks.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: "Guido Günther" <agx@sigxcpu.org>
Cc: Purism Kernel Team <kernel@puri.sm>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191207140353.23967-18-sam@ravnborg.org
2019-12-09 22:57:27 +01:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Rockteck jh057n00900 5.5" MIPI-DSI panel driver
*
* Copyright (C) Purism SPC 2019
*/
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <video/display_timing.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#define DRV_NAME "panel-rocktech-jh057n00900"
/* Manufacturer specific Commands send via DSI */
#define ST7703_CMD_ALL_PIXEL_OFF 0x22
#define ST7703_CMD_ALL_PIXEL_ON 0x23
#define ST7703_CMD_SETDISP 0xB2
#define ST7703_CMD_SETRGBIF 0xB3
#define ST7703_CMD_SETCYC 0xB4
#define ST7703_CMD_SETBGP 0xB5
#define ST7703_CMD_SETVCOM 0xB6
#define ST7703_CMD_SETOTP 0xB7
#define ST7703_CMD_SETPOWER_EXT 0xB8
#define ST7703_CMD_SETEXTC 0xB9
#define ST7703_CMD_SETMIPI 0xBA
#define ST7703_CMD_SETVDC 0xBC
#define ST7703_CMD_UNKNOWN0 0xBF
#define ST7703_CMD_SETSCR 0xC0
#define ST7703_CMD_SETPOWER 0xC1
#define ST7703_CMD_SETPANEL 0xCC
#define ST7703_CMD_SETGAMMA 0xE0
#define ST7703_CMD_SETEQ 0xE3
#define ST7703_CMD_SETGIP1 0xE9
#define ST7703_CMD_SETGIP2 0xEA
struct jh057n {
struct device *dev;
struct drm_panel panel;
struct gpio_desc *reset_gpio;
struct regulator *vcc;
struct regulator *iovcc;
bool prepared;
struct dentry *debugfs;
};
static inline struct jh057n *panel_to_jh057n(struct drm_panel *panel)
{
return container_of(panel, struct jh057n, panel);
}
#define dsi_generic_write_seq(dsi, seq...) do { \
static const u8 d[] = { seq }; \
int ret; \
ret = mipi_dsi_generic_write(dsi, d, ARRAY_SIZE(d)); \
if (ret < 0) \
return ret; \
} while (0)
static int jh057n_init_sequence(struct jh057n *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
struct device *dev = ctx->dev;
int ret;
/*
* Init sequence was supplied by the panel vendor. Most of the commands
* resemble the ST7703 but the number of parameters often don't match
* so it's likely a clone.
*/
dsi_generic_write_seq(dsi, ST7703_CMD_SETEXTC,
0xF1, 0x12, 0x83);
dsi_generic_write_seq(dsi, ST7703_CMD_SETRGBIF,
0x10, 0x10, 0x05, 0x05, 0x03, 0xFF, 0x00, 0x00,
0x00, 0x00);
dsi_generic_write_seq(dsi, ST7703_CMD_SETSCR,
0x73, 0x73, 0x50, 0x50, 0x00, 0x00, 0x08, 0x70,
0x00);
dsi_generic_write_seq(dsi, ST7703_CMD_SETVDC, 0x4E);
dsi_generic_write_seq(dsi, ST7703_CMD_SETPANEL, 0x0B);
dsi_generic_write_seq(dsi, ST7703_CMD_SETCYC, 0x80);
dsi_generic_write_seq(dsi, ST7703_CMD_SETDISP, 0xF0, 0x12, 0x30);
dsi_generic_write_seq(dsi, ST7703_CMD_SETEQ,
0x07, 0x07, 0x0B, 0x0B, 0x03, 0x0B, 0x00, 0x00,
0x00, 0x00, 0xFF, 0x00, 0xC0, 0x10);
dsi_generic_write_seq(dsi, ST7703_CMD_SETBGP, 0x08, 0x08);
msleep(20);
dsi_generic_write_seq(dsi, ST7703_CMD_SETVCOM, 0x3F, 0x3F);
dsi_generic_write_seq(dsi, ST7703_CMD_UNKNOWN0, 0x02, 0x11, 0x00);
dsi_generic_write_seq(dsi, ST7703_CMD_SETGIP1,
0x82, 0x10, 0x06, 0x05, 0x9E, 0x0A, 0xA5, 0x12,
0x31, 0x23, 0x37, 0x83, 0x04, 0xBC, 0x27, 0x38,
0x0C, 0x00, 0x03, 0x00, 0x00, 0x00, 0x0C, 0x00,
0x03, 0x00, 0x00, 0x00, 0x75, 0x75, 0x31, 0x88,
0x88, 0x88, 0x88, 0x88, 0x88, 0x13, 0x88, 0x64,
0x64, 0x20, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88,
0x02, 0x88, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
dsi_generic_write_seq(dsi, ST7703_CMD_SETGIP2,
0x02, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x02, 0x46, 0x02, 0x88,
0x88, 0x88, 0x88, 0x88, 0x88, 0x64, 0x88, 0x13,
0x57, 0x13, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88,
0x75, 0x88, 0x23, 0x14, 0x00, 0x00, 0x02, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x0A,
0xA5, 0x00, 0x00, 0x00, 0x00);
dsi_generic_write_seq(dsi, ST7703_CMD_SETGAMMA,
0x00, 0x09, 0x0E, 0x29, 0x2D, 0x3C, 0x41, 0x37,
0x07, 0x0B, 0x0D, 0x10, 0x11, 0x0F, 0x10, 0x11,
0x18, 0x00, 0x09, 0x0E, 0x29, 0x2D, 0x3C, 0x41,
0x37, 0x07, 0x0B, 0x0D, 0x10, 0x11, 0x0F, 0x10,
0x11, 0x18);
msleep(20);
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to exit sleep mode: %d\n", ret);
return ret;
}
/* Panel is operational 120 msec after reset */
msleep(60);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret)
return ret;
DRM_DEV_DEBUG_DRIVER(dev, "Panel init sequence done\n");
return 0;
}
static int jh057n_enable(struct drm_panel *panel)
{
struct jh057n *ctx = panel_to_jh057n(panel);
int ret;
ret = jh057n_init_sequence(ctx);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "Panel init sequence failed: %d\n",
ret);
return ret;
}
return 0;
}
static int jh057n_disable(struct drm_panel *panel)
{
struct jh057n *ctx = panel_to_jh057n(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
return mipi_dsi_dcs_set_display_off(dsi);
}
static int jh057n_unprepare(struct drm_panel *panel)
{
struct jh057n *ctx = panel_to_jh057n(panel);
if (!ctx->prepared)
return 0;
regulator_disable(ctx->iovcc);
regulator_disable(ctx->vcc);
ctx->prepared = false;
return 0;
}
static int jh057n_prepare(struct drm_panel *panel)
{
struct jh057n *ctx = panel_to_jh057n(panel);
int ret;
if (ctx->prepared)
return 0;
DRM_DEV_DEBUG_DRIVER(ctx->dev, "Resetting the panel\n");
ret = regulator_enable(ctx->vcc);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev,
"Failed to enable vcc supply: %d\n", ret);
return ret;
}
ret = regulator_enable(ctx->iovcc);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev,
"Failed to enable iovcc supply: %d\n", ret);
goto disable_vcc;
}
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(20, 40);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
msleep(20);
ctx->prepared = true;
return 0;
disable_vcc:
regulator_disable(ctx->vcc);
return ret;
}
static const struct drm_display_mode default_mode = {
.hdisplay = 720,
.hsync_start = 720 + 90,
.hsync_end = 720 + 90 + 20,
.htotal = 720 + 90 + 20 + 20,
.vdisplay = 1440,
.vsync_start = 1440 + 20,
.vsync_end = 1440 + 20 + 4,
.vtotal = 1440 + 20 + 4 + 12,
.vrefresh = 60,
.clock = 75276,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
.width_mm = 65,
.height_mm = 130,
};
static int jh057n_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct jh057n *ctx = panel_to_jh057n(panel);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &default_mode);
if (!mode) {
DRM_DEV_ERROR(ctx->dev, "Failed to add mode %ux%u@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
default_mode.vrefresh);
return -ENOMEM;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_mode_probed_add(connector, mode);
return 1;
}
static const struct drm_panel_funcs jh057n_drm_funcs = {
.disable = jh057n_disable,
.unprepare = jh057n_unprepare,
.prepare = jh057n_prepare,
.enable = jh057n_enable,
.get_modes = jh057n_get_modes,
};
static int allpixelson_set(void *data, u64 val)
{
struct jh057n *ctx = data;
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
DRM_DEV_DEBUG_DRIVER(ctx->dev, "Setting all pixels on\n");
dsi_generic_write_seq(dsi, ST7703_CMD_ALL_PIXEL_ON);
msleep(val * 1000);
/* Reset the panel to get video back */
drm_panel_disable(&ctx->panel);
drm_panel_unprepare(&ctx->panel);
drm_panel_prepare(&ctx->panel);
drm_panel_enable(&ctx->panel);
return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(allpixelson_fops, NULL,
allpixelson_set, "%llu\n");
static void jh057n_debugfs_init(struct jh057n *ctx)
{
ctx->debugfs = debugfs_create_dir(DRV_NAME, NULL);
debugfs_create_file("allpixelson", 0600, ctx->debugfs, ctx,
&allpixelson_fops);
}
static void jh057n_debugfs_remove(struct jh057n *ctx)
{
debugfs_remove_recursive(ctx->debugfs);
ctx->debugfs = NULL;
}
static int jh057n_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct jh057n *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
DRM_DEV_ERROR(dev, "cannot get reset gpio\n");
return PTR_ERR(ctx->reset_gpio);
}
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
ctx->vcc = devm_regulator_get(dev, "vcc");
if (IS_ERR(ctx->vcc)) {
ret = PTR_ERR(ctx->vcc);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev,
"Failed to request vcc regulator: %d\n",
ret);
return ret;
}
ctx->iovcc = devm_regulator_get(dev, "iovcc");
if (IS_ERR(ctx->iovcc)) {
ret = PTR_ERR(ctx->iovcc);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev,
"Failed to request iovcc regulator: %d\n",
ret);
return ret;
}
drm_panel_init(&ctx->panel, dev, &jh057n_drm_funcs,
DRM_MODE_CONNECTOR_DSI);
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return ret;
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
DRM_DEV_ERROR(dev,
"mipi_dsi_attach failed (%d). Is host ready?\n",
ret);
drm_panel_remove(&ctx->panel);
return ret;
}
DRM_DEV_INFO(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
default_mode.hdisplay, default_mode.vdisplay,
default_mode.vrefresh,
mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
jh057n_debugfs_init(ctx);
return 0;
}
static void jh057n_shutdown(struct mipi_dsi_device *dsi)
{
struct jh057n *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
ret = drm_panel_unprepare(&ctx->panel);
if (ret < 0)
DRM_DEV_ERROR(&dsi->dev, "Failed to unprepare panel: %d\n",
ret);
ret = drm_panel_disable(&ctx->panel);
if (ret < 0)
DRM_DEV_ERROR(&dsi->dev, "Failed to disable panel: %d\n",
ret);
}
static int jh057n_remove(struct mipi_dsi_device *dsi)
{
struct jh057n *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
jh057n_shutdown(dsi);
ret = mipi_dsi_detach(dsi);
if (ret < 0)
DRM_DEV_ERROR(&dsi->dev, "Failed to detach from DSI host: %d\n",
ret);
drm_panel_remove(&ctx->panel);
jh057n_debugfs_remove(ctx);
return 0;
}
static const struct of_device_id jh057n_of_match[] = {
{ .compatible = "rocktech,jh057n00900" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, jh057n_of_match);
static struct mipi_dsi_driver jh057n_driver = {
.probe = jh057n_probe,
.remove = jh057n_remove,
.shutdown = jh057n_shutdown,
.driver = {
.name = DRV_NAME,
.of_match_table = jh057n_of_match,
},
};
module_mipi_dsi_driver(jh057n_driver);
MODULE_AUTHOR("Guido Günther <agx@sigxcpu.org>");
MODULE_DESCRIPTION("DRM driver for Rocktech JH057N00900 MIPI DSI panel");
MODULE_LICENSE("GPL v2");
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