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linux_dsm_epyc7002/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
Nickey Yang 2a994cbed6 drm/panel: Add Kingdisplay KD097D04 panel driver 
Support Kingdisplay KD097D04 9.7" 1536x2048 TFT LCD panel, it is a MIPI
dual-DSI panel.

v4-resend:
- Thierry noted missing dt-bindings for v4 but forgot that he
  already had applied them one kernel release back in
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ebc950fdff6d5f9250cd5a5a348af97f7d8508df
v4:
- address Philipp's comments
  - real range for usleep_range and
  - poweroff ordering in kingdisplay_panel_prepare
  - return value beautification in panel_probe
- update author naming for full name
v3:
- address Thierry's comments
  - error handling for init dsi writes in init
  - unconditionally remove the panel
  - don't use drm_panel_detach
  - a bit of variable signednes wiggling
- I did talk to ChromeOS people and the delays really should be as short
  as possible, so dropped the 100ms from the delay comments
v2:
- update timing + cmds from chromeos kernel
- new backlight API including switch to devm_of_find_backlight
- fix most of Sean Paul's comments
  enable/prepare tracking seems something all panels do
- document origins of the init sequence
- lanes per dsi interface to 4 (two interfaces). Matches how tegra
  and pending rockchip dual-dsi handle (dual-)dsi lanes
- spdx header instead of license boilerplate

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Sean Paul <sean@poorly.run>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181030091528.28211-1-heiko@sntech.de
2019-01-28 17:45:26 +01:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
*/
#include <linux/backlight.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
#include <video/mipi_display.h>
struct kingdisplay_panel {
struct drm_panel base;
struct mipi_dsi_device *link;
struct backlight_device *backlight;
struct regulator *supply;
struct gpio_desc *enable_gpio;
bool prepared;
bool enabled;
};
struct kingdisplay_panel_cmd {
char cmd;
char data;
};
/*
* According to the discussion on
* https://review.coreboot.org/#/c/coreboot/+/22472/
* the panel init array is not part of the panels datasheet but instead
* just came in this form from the panel vendor.
*/
static const struct kingdisplay_panel_cmd init_code[] = {
/* voltage setting */
{ 0xB0, 0x00 },
{ 0xB2, 0x02 },
{ 0xB3, 0x11 },
{ 0xB4, 0x00 },
{ 0xB6, 0x80 },
/* VCOM disable */
{ 0xB7, 0x02 },
{ 0xB8, 0x80 },
{ 0xBA, 0x43 },
/* VCOM setting */
{ 0xBB, 0x53 },
/* VSP setting */
{ 0xBC, 0x0A },
/* VSN setting */
{ 0xBD, 0x4A },
/* VGH setting */
{ 0xBE, 0x2F },
/* VGL setting */
{ 0xBF, 0x1A },
{ 0xF0, 0x39 },
{ 0xF1, 0x22 },
/* Gamma setting */
{ 0xB0, 0x02 },
{ 0xC0, 0x00 },
{ 0xC1, 0x01 },
{ 0xC2, 0x0B },
{ 0xC3, 0x15 },
{ 0xC4, 0x22 },
{ 0xC5, 0x11 },
{ 0xC6, 0x15 },
{ 0xC7, 0x19 },
{ 0xC8, 0x1A },
{ 0xC9, 0x16 },
{ 0xCA, 0x18 },
{ 0xCB, 0x13 },
{ 0xCC, 0x18 },
{ 0xCD, 0x13 },
{ 0xCE, 0x1C },
{ 0xCF, 0x19 },
{ 0xD0, 0x21 },
{ 0xD1, 0x2C },
{ 0xD2, 0x2F },
{ 0xD3, 0x30 },
{ 0xD4, 0x19 },
{ 0xD5, 0x1F },
{ 0xD6, 0x00 },
{ 0xD7, 0x01 },
{ 0xD8, 0x0B },
{ 0xD9, 0x15 },
{ 0xDA, 0x22 },
{ 0xDB, 0x11 },
{ 0xDC, 0x15 },
{ 0xDD, 0x19 },
{ 0xDE, 0x1A },
{ 0xDF, 0x16 },
{ 0xE0, 0x18 },
{ 0xE1, 0x13 },
{ 0xE2, 0x18 },
{ 0xE3, 0x13 },
{ 0xE4, 0x1C },
{ 0xE5, 0x19 },
{ 0xE6, 0x21 },
{ 0xE7, 0x2C },
{ 0xE8, 0x2F },
{ 0xE9, 0x30 },
{ 0xEA, 0x19 },
{ 0xEB, 0x1F },
/* GOA MUX setting */
{ 0xB0, 0x01 },
{ 0xC0, 0x10 },
{ 0xC1, 0x0F },
{ 0xC2, 0x0E },
{ 0xC3, 0x0D },
{ 0xC4, 0x0C },
{ 0xC5, 0x0B },
{ 0xC6, 0x0A },
{ 0xC7, 0x09 },
{ 0xC8, 0x08 },
{ 0xC9, 0x07 },
{ 0xCA, 0x06 },
{ 0xCB, 0x05 },
{ 0xCC, 0x00 },
{ 0xCD, 0x01 },
{ 0xCE, 0x02 },
{ 0xCF, 0x03 },
{ 0xD0, 0x04 },
{ 0xD6, 0x10 },
{ 0xD7, 0x0F },
{ 0xD8, 0x0E },
{ 0xD9, 0x0D },
{ 0xDA, 0x0C },
{ 0xDB, 0x0B },
{ 0xDC, 0x0A },
{ 0xDD, 0x09 },
{ 0xDE, 0x08 },
{ 0xDF, 0x07 },
{ 0xE0, 0x06 },
{ 0xE1, 0x05 },
{ 0xE2, 0x00 },
{ 0xE3, 0x01 },
{ 0xE4, 0x02 },
{ 0xE5, 0x03 },
{ 0xE6, 0x04 },
{ 0xE7, 0x00 },
{ 0xEC, 0xC0 },
/* GOA timing setting */
{ 0xB0, 0x03 },
{ 0xC0, 0x01 },
{ 0xC2, 0x6F },
{ 0xC3, 0x6F },
{ 0xC5, 0x36 },
{ 0xC8, 0x08 },
{ 0xC9, 0x04 },
{ 0xCA, 0x41 },
{ 0xCC, 0x43 },
{ 0xCF, 0x60 },
{ 0xD2, 0x04 },
{ 0xD3, 0x04 },
{ 0xD4, 0x03 },
{ 0xD5, 0x02 },
{ 0xD6, 0x01 },
{ 0xD7, 0x00 },
{ 0xDB, 0x01 },
{ 0xDE, 0x36 },
{ 0xE6, 0x6F },
{ 0xE7, 0x6F },
/* GOE setting */
{ 0xB0, 0x06 },
{ 0xB8, 0xA5 },
{ 0xC0, 0xA5 },
{ 0xD5, 0x3F },
};
static inline
struct kingdisplay_panel *to_kingdisplay_panel(struct drm_panel *panel)
{
return container_of(panel, struct kingdisplay_panel, base);
}
static int kingdisplay_panel_disable(struct drm_panel *panel)
{
struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
int err;
if (!kingdisplay->enabled)
return 0;
backlight_disable(kingdisplay->backlight);
err = mipi_dsi_dcs_set_display_off(kingdisplay->link);
if (err < 0)
DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
err);
kingdisplay->enabled = false;
return 0;
}
static int kingdisplay_panel_unprepare(struct drm_panel *panel)
{
struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
int err;
if (!kingdisplay->prepared)
return 0;
err = mipi_dsi_dcs_enter_sleep_mode(kingdisplay->link);
if (err < 0) {
DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
err);
return err;
}
/* T15: 120ms */
msleep(120);
gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
err = regulator_disable(kingdisplay->supply);
if (err < 0)
return err;
kingdisplay->prepared = false;
return 0;
}
static int kingdisplay_panel_prepare(struct drm_panel *panel)
{
struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
int err, regulator_err;
unsigned int i;
if (kingdisplay->prepared)
return 0;
gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
err = regulator_enable(kingdisplay->supply);
if (err < 0)
return err;
/* T2: 15ms */
usleep_range(15000, 16000);
gpiod_set_value_cansleep(kingdisplay->enable_gpio, 1);
/* T4: 15ms */
usleep_range(15000, 16000);
for (i = 0; i < ARRAY_SIZE(init_code); i++) {
err = mipi_dsi_generic_write(kingdisplay->link, &init_code[i],
sizeof(struct kingdisplay_panel_cmd));
if (err < 0) {
DRM_DEV_ERROR(panel->dev, "failed write init cmds: %d\n",
err);
goto poweroff;
}
}
err = mipi_dsi_dcs_exit_sleep_mode(kingdisplay->link);
if (err < 0) {
DRM_DEV_ERROR(panel->dev, "failed to exit sleep mode: %d\n",
err);
goto poweroff;
}
/* T6: 120ms */
msleep(120);
err = mipi_dsi_dcs_set_display_on(kingdisplay->link);
if (err < 0) {
DRM_DEV_ERROR(panel->dev, "failed to set display on: %d\n",
err);
goto poweroff;
}
/* T7: 10ms */
usleep_range(10000, 11000);
kingdisplay->prepared = true;
return 0;
poweroff:
gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
regulator_err = regulator_disable(kingdisplay->supply);
if (regulator_err)
DRM_DEV_ERROR(panel->dev, "failed to disable regulator: %d\n",
regulator_err);
return err;
}
static int kingdisplay_panel_enable(struct drm_panel *panel)
{
struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
int ret;
if (kingdisplay->enabled)
return 0;
ret = backlight_enable(kingdisplay->backlight);
if (ret) {
DRM_DEV_ERROR(panel->drm->dev,
"Failed to enable backlight %d\n", ret);
return ret;
}
kingdisplay->enabled = true;
return 0;
}
static const struct drm_display_mode default_mode = {
.clock = 229000,
.hdisplay = 1536,
.hsync_start = 1536 + 100,
.hsync_end = 1536 + 100 + 24,
.htotal = 1536 + 100 + 24 + 100,
.vdisplay = 2048,
.vsync_start = 2048 + 95,
.vsync_end = 2048 + 95 + 2,
.vtotal = 2048 + 95 + 2 + 23,
.vrefresh = 60,
};
static int kingdisplay_panel_get_modes(struct drm_panel *panel)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(panel->drm, &default_mode);
if (!mode) {
DRM_DEV_ERROR(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
default_mode.vrefresh);
return -ENOMEM;
}
drm_mode_set_name(mode);
drm_mode_probed_add(panel->connector, mode);
panel->connector->display_info.width_mm = 147;
panel->connector->display_info.height_mm = 196;
panel->connector->display_info.bpc = 8;
return 1;
}
static const struct drm_panel_funcs kingdisplay_panel_funcs = {
.disable = kingdisplay_panel_disable,
.unprepare = kingdisplay_panel_unprepare,
.prepare = kingdisplay_panel_prepare,
.enable = kingdisplay_panel_enable,
.get_modes = kingdisplay_panel_get_modes,
};
static const struct of_device_id kingdisplay_of_match[] = {
{ .compatible = "kingdisplay,kd097d04", },
{ }
};
MODULE_DEVICE_TABLE(of, kingdisplay_of_match);
static int kingdisplay_panel_add(struct kingdisplay_panel *kingdisplay)
{
struct device *dev = &kingdisplay->link->dev;
int err;
kingdisplay->supply = devm_regulator_get(dev, "power");
if (IS_ERR(kingdisplay->supply))
return PTR_ERR(kingdisplay->supply);
kingdisplay->enable_gpio = devm_gpiod_get_optional(dev, "enable",
GPIOD_OUT_HIGH);
if (IS_ERR(kingdisplay->enable_gpio)) {
err = PTR_ERR(kingdisplay->enable_gpio);
dev_dbg(dev, "failed to get enable gpio: %d\n", err);
kingdisplay->enable_gpio = NULL;
}
kingdisplay->backlight = devm_of_find_backlight(dev);
if (IS_ERR(kingdisplay->backlight))
return PTR_ERR(kingdisplay->backlight);
drm_panel_init(&kingdisplay->base);
kingdisplay->base.funcs = &kingdisplay_panel_funcs;
kingdisplay->base.dev = &kingdisplay->link->dev;
return drm_panel_add(&kingdisplay->base);
}
static void kingdisplay_panel_del(struct kingdisplay_panel *kingdisplay)
{
drm_panel_remove(&kingdisplay->base);
}
static int kingdisplay_panel_probe(struct mipi_dsi_device *dsi)
{
struct kingdisplay_panel *kingdisplay;
int err;
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM;
kingdisplay = devm_kzalloc(&dsi->dev, sizeof(*kingdisplay), GFP_KERNEL);
if (!kingdisplay)
return -ENOMEM;
mipi_dsi_set_drvdata(dsi, kingdisplay);
kingdisplay->link = dsi;
err = kingdisplay_panel_add(kingdisplay);
if (err < 0)
return err;
return mipi_dsi_attach(dsi);
}
static int kingdisplay_panel_remove(struct mipi_dsi_device *dsi)
{
struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi);
int err;
err = kingdisplay_panel_unprepare(&kingdisplay->base);
if (err < 0)
DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n",
err);
err = kingdisplay_panel_disable(&kingdisplay->base);
if (err < 0)
DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err);
err = mipi_dsi_detach(dsi);
if (err < 0)
DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n",
err);
kingdisplay_panel_del(kingdisplay);
return 0;
}
static void kingdisplay_panel_shutdown(struct mipi_dsi_device *dsi)
{
struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi);
kingdisplay_panel_unprepare(&kingdisplay->base);
kingdisplay_panel_disable(&kingdisplay->base);
}
static struct mipi_dsi_driver kingdisplay_panel_driver = {
.driver = {
.name = "panel-kingdisplay-kd097d04",
.of_match_table = kingdisplay_of_match,
},
.probe = kingdisplay_panel_probe,
.remove = kingdisplay_panel_remove,
.shutdown = kingdisplay_panel_shutdown,
};
module_mipi_dsi_driver(kingdisplay_panel_driver);
MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
MODULE_AUTHOR("Nickey Yang <nickey.yang@rock-chips.com>");
MODULE_DESCRIPTION("kingdisplay KD097D04 panel driver");
MODULE_LICENSE("GPL v2");
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