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linux-stable/drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c
Uwe Kleine-König 79abca2b39 drm/mipi-dsi: Make remove callback return void 
All implementations return 0 and the return value of mipi_dsi_drv_remove()
is ignored anyhow.

So change the prototype of the remove function to return no value. This
way driver authors are not tempted to assume that passing an error to
the upper layer is a good idea. All drivers are adapted accordingly.
There is no intended change of behaviour.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220708094922.1408248-4-u.kleine-koenig@pengutronix.de
2022-07-09 10:50:03 +02:00

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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 <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 b[] = { cmd, seq }; \
int ret; \
ret = mipi_dsi_dcs_write_buffer(dsi, b, ARRAY_SIZE(b)); \
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);
dev_dbg(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)
dev_err(ctx->dev, "failed to set display off: %d\n", ret);
mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0) {
dev_err(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;
dev_dbg(ctx->dev, "Resetting the panel\n");
ret = regulator_enable(ctx->vci);
if (ret < 0) {
dev_err(ctx->dev, "Failed to enable vci supply: %d\n", ret);
return ret;
}
ret = regulator_enable(ctx->iovcc);
if (ret < 0) {
dev_err(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) {
dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
goto disable_iovcc;
}
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
dev_err(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) {
dev_err(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,
.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) {
dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
drm_mode_vrefresh(&default_mode));
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))
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
"cannot get reset gpio\n");
ctx->vci = devm_regulator_get(dev, "vci");
if (IS_ERR(ctx->vci))
return dev_err_probe(dev, PTR_ERR(ctx->vci),
"Failed to request vci regulator\n");
ctx->iovcc = devm_regulator_get(dev, "iovcc");
if (IS_ERR(ctx->iovcc))
return dev_err_probe(dev, PTR_ERR(ctx->iovcc),
"Failed to request iovcc regulator\n");
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_NO_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) {
dev_err(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)
dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);
ret = drm_panel_disable(&ctx->panel);
if (ret < 0)
dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);
}
static void 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)
dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
}
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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