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linux/drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c
Heiko Stuebner d1479d028a drm/panel: add panel driver for Xinpeng XPP055C272 panels 
Base on the somewhat similar Rocktech driver but adapted for
panel-specific init of the XPP055C272.

changes in v5:
- drop error message when backlight not found, no other panel
  does that and if needed it should live in drm_panel_of_backlight
changes in v4:
  none
changes in v3:
- remove wrong negative sync flags from display-mode to fix a display
  artifact of the output getting move a tiny bit to the right
changes in v2:
- move to drm-panel-internal backlight handling (Sam)
- adapt to changes that happened to drm_panel structs+functions (Sam)
- sort includes (Sam)
- drop unnecessary DRV_NAME constant (Sam)
- do mipi_dsi_dcs_exit_sleep_mode and mipi_dsi_dcs_set_display_on
  in panel prepare (not init_sequence) to keep symmetric (Sam)

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191224112907.30758-3-heiko@sntech.de
2020-01-04 16:20:31 +01:00

399 lines
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// SPDX-License-Identifier: GPL-2.0
/*
* Xinpeng xpp055c272 5.5" MIPI-DSI panel driver
* Copyright (C) 2019 Theobroma Systems Design und Consulting GmbH
*
* based on
*
* Rockteck jh057n00900 5.5" MIPI-DSI panel driver
* Copyright (C) Purism SPC 2019
*/
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#include <video/display_timing.h>
#include <video/mipi_display.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
/* Manufacturer specific Commands send via DSI */
#define XPP055C272_CMD_ALL_PIXEL_OFF 0x22
#define XPP055C272_CMD_ALL_PIXEL_ON 0x23
#define XPP055C272_CMD_SETDISP 0xb2
#define XPP055C272_CMD_SETRGBIF 0xb3
#define XPP055C272_CMD_SETCYC 0xb4
#define XPP055C272_CMD_SETBGP 0xb5
#define XPP055C272_CMD_SETVCOM 0xb6
#define XPP055C272_CMD_SETOTP 0xb7
#define XPP055C272_CMD_SETPOWER_EXT 0xb8
#define XPP055C272_CMD_SETEXTC 0xb9
#define XPP055C272_CMD_SETMIPI 0xbA
#define XPP055C272_CMD_SETVDC 0xbc
#define XPP055C272_CMD_SETPCR 0xbf
#define XPP055C272_CMD_SETSCR 0xc0
#define XPP055C272_CMD_SETPOWER 0xc1
#define XPP055C272_CMD_SETECO 0xc6
#define XPP055C272_CMD_SETPANEL 0xcc
#define XPP055C272_CMD_SETGAMMA 0xe0
#define XPP055C272_CMD_SETEQ 0xe3
#define XPP055C272_CMD_SETGIP1 0xe9
#define XPP055C272_CMD_SETGIP2 0xea
struct xpp055c272 {
struct device *dev;
struct drm_panel panel;
struct gpio_desc *reset_gpio;
struct regulator *vci;
struct regulator *iovcc;
bool prepared;
};
static inline struct xpp055c272 *panel_to_xpp055c272(struct drm_panel *panel)
{
return container_of(panel, struct xpp055c272, panel);
}
#define dsi_generic_write_seq(dsi, cmd, seq...) do { \
static const u8 d[] = { seq }; \
int ret; \
ret = mipi_dsi_dcs_write(dsi, cmd, d, ARRAY_SIZE(d)); \
if (ret < 0) \
return ret; \
} while (0)
static int xpp055c272_init_sequence(struct xpp055c272 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
struct device *dev = ctx->dev;
/*
* Init sequence was supplied by the panel vendor without much
* documentation.
*/
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETEXTC, 0xf1, 0x12, 0x83);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETMIPI,
0x33, 0x81, 0x05, 0xf9, 0x0e, 0x0e, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x44, 0x25,
0x00, 0x91, 0x0a, 0x00, 0x00, 0x02, 0x4f, 0x01,
0x00, 0x00, 0x37);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETPOWER_EXT, 0x25);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETPCR, 0x02, 0x11, 0x00);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETRGBIF,
0x0c, 0x10, 0x0a, 0x50, 0x03, 0xff, 0x00, 0x00,
0x00, 0x00);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETSCR,
0x73, 0x73, 0x50, 0x50, 0x00, 0x00, 0x08, 0x70,
0x00);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETVDC, 0x46);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETPANEL, 0x0b);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETCYC, 0x80);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETDISP, 0xc8, 0x12, 0x30);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETEQ,
0x07, 0x07, 0x0B, 0x0B, 0x03, 0x0B, 0x00, 0x00,
0x00, 0x00, 0xFF, 0x00, 0xC0, 0x10);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETPOWER,
0x53, 0x00, 0x1e, 0x1e, 0x77, 0xe1, 0xcc, 0xdd,
0x67, 0x77, 0x33, 0x33);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETECO, 0x00, 0x00, 0xff,
0xff, 0x01, 0xff);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETBGP, 0x09, 0x09);
msleep(20);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETVCOM, 0x87, 0x95);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETGIP1,
0xc2, 0x10, 0x05, 0x05, 0x10, 0x05, 0xa0, 0x12,
0x31, 0x23, 0x3f, 0x81, 0x0a, 0xa0, 0x37, 0x18,
0x00, 0x80, 0x01, 0x00, 0x00, 0x00, 0x00, 0x80,
0x01, 0x00, 0x00, 0x00, 0x48, 0xf8, 0x86, 0x42,
0x08, 0x88, 0x88, 0x80, 0x88, 0x88, 0x88, 0x58,
0xf8, 0x87, 0x53, 0x18, 0x88, 0x88, 0x81, 0x88,
0x88, 0x88, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETGIP2,
0x00, 0x1a, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00,
0x00, 0x00, 0x00, 0x00, 0x1f, 0x88, 0x81, 0x35,
0x78, 0x88, 0x88, 0x85, 0x88, 0x88, 0x88, 0x0f,
0x88, 0x80, 0x24, 0x68, 0x88, 0x88, 0x84, 0x88,
0x88, 0x88, 0x23, 0x10, 0x00, 0x00, 0x1c, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x05,
0xa0, 0x00, 0x00, 0x00, 0x00);
dsi_generic_write_seq(dsi, XPP055C272_CMD_SETGAMMA,
0x00, 0x06, 0x08, 0x2a, 0x31, 0x3f, 0x38, 0x36,
0x07, 0x0c, 0x0d, 0x11, 0x13, 0x12, 0x13, 0x11,
0x18, 0x00, 0x06, 0x08, 0x2a, 0x31, 0x3f, 0x38,
0x36, 0x07, 0x0c, 0x0d, 0x11, 0x13, 0x12, 0x13,
0x11, 0x18);
msleep(60);
DRM_DEV_DEBUG_DRIVER(dev, "Panel init sequence done\n");
return 0;
}
static int xpp055c272_unprepare(struct drm_panel *panel)
{
struct xpp055c272 *ctx = panel_to_xpp055c272(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
if (!ctx->prepared)
return 0;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0)
DRM_DEV_ERROR(ctx->dev, "failed to set display off: %d\n",
ret);
mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "failed to enter sleep mode: %d\n",
ret);
return ret;
}
regulator_disable(ctx->iovcc);
regulator_disable(ctx->vci);
ctx->prepared = false;
return 0;
}
static int xpp055c272_prepare(struct drm_panel *panel)
{
struct xpp055c272 *ctx = panel_to_xpp055c272(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
if (ctx->prepared)
return 0;
DRM_DEV_DEBUG_DRIVER(ctx->dev, "Resetting the panel\n");
ret = regulator_enable(ctx->vci);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev,
"Failed to enable vci 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_vci;
}
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
/* T6: 10us */
usleep_range(10, 20);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
/* T8: 20ms */
msleep(20);
ret = xpp055c272_init_sequence(ctx);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "Panel init sequence failed: %d\n",
ret);
goto disable_iovcc;
}
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
goto disable_iovcc;
}
/* T9: 120ms */
msleep(120);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
DRM_DEV_ERROR(ctx->dev, "Failed to set display on: %d\n", ret);
goto disable_iovcc;
}
msleep(50);
ctx->prepared = true;
return 0;
disable_iovcc:
regulator_disable(ctx->iovcc);
disable_vci:
regulator_disable(ctx->vci);
return ret;
}
static const struct drm_display_mode default_mode = {
.hdisplay = 720,
.hsync_start = 720 + 40,
.hsync_end = 720 + 40 + 10,
.htotal = 720 + 40 + 10 + 40,
.vdisplay = 1280,
.vsync_start = 1280 + 22,
.vsync_end = 1280 + 22 + 4,
.vtotal = 1280 + 22 + 4 + 11,
.vrefresh = 60,
.clock = 64000,
.width_mm = 68,
.height_mm = 121,
};
static int xpp055c272_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct xpp055c272 *ctx = panel_to_xpp055c272(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 xpp055c272_funcs = {
.unprepare = xpp055c272_unprepare,
.prepare = xpp055c272_prepare,
.get_modes = xpp055c272_get_modes,
};
static int xpp055c272_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct xpp055c272 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->reset_gpio = devm_gpiod_get_optional(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);
}
ctx->vci = devm_regulator_get(dev, "vci");
if (IS_ERR(ctx->vci)) {
ret = PTR_ERR(ctx->vci);
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev,
"Failed to request vci 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;
}
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_LPM | MIPI_DSI_MODE_EOT_PACKET;
drm_panel_init(&ctx->panel, &dsi->dev, &xpp055c272_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\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void xpp055c272_shutdown(struct mipi_dsi_device *dsi)
{
struct xpp055c272 *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 xpp055c272_remove(struct mipi_dsi_device *dsi)
{
struct xpp055c272 *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
xpp055c272_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);
return 0;
}
static const struct of_device_id xpp055c272_of_match[] = {
{ .compatible = "xinpeng,xpp055c272" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, xpp055c272_of_match);
static struct mipi_dsi_driver xpp055c272_driver = {
.driver = {
.name = "panel-xinpeng-xpp055c272",
.of_match_table = xpp055c272_of_match,
},
.probe = xpp055c272_probe,
.remove = xpp055c272_remove,
.shutdown = xpp055c272_shutdown,
};
module_mipi_dsi_driver(xpp055c272_driver);
MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
MODULE_DESCRIPTION("DRM driver for Xinpeng xpp055c272 MIPI DSI panel");
MODULE_LICENSE("GPL v2");
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