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linux-stable/drivers/gpu/drm/panel/panel-raydium-rm68200.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
/*
* Copyright (C) STMicroelectronics SA 2017
*
* Authors: Philippe Cornu <philippe.cornu@st.com>
* Yannick Fertre <yannick.fertre@st.com>
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
/*** Manufacturer Command Set ***/
#define MCS_CMD_MODE_SW 0xFE /* CMD Mode Switch */
#define MCS_CMD1_UCS 0x00 /* User Command Set (UCS = CMD1) */
#define MCS_CMD2_P0 0x01 /* Manufacture Command Set Page0 (CMD2 P0) */
#define MCS_CMD2_P1 0x02 /* Manufacture Command Set Page1 (CMD2 P1) */
#define MCS_CMD2_P2 0x03 /* Manufacture Command Set Page2 (CMD2 P2) */
#define MCS_CMD2_P3 0x04 /* Manufacture Command Set Page3 (CMD2 P3) */
/* CMD2 P0 commands (Display Options and Power) */
#define MCS_STBCTR 0x12 /* TE1 Output Setting Zig-Zag Connection */
#define MCS_SGOPCTR 0x16 /* Source Bias Current */
#define MCS_SDCTR 0x1A /* Source Output Delay Time */
#define MCS_INVCTR 0x1B /* Inversion Type */
#define MCS_EXT_PWR_IC 0x24 /* External PWR IC Control */
#define MCS_SETAVDD 0x27 /* PFM Control for AVDD Output */
#define MCS_SETAVEE 0x29 /* PFM Control for AVEE Output */
#define MCS_BT2CTR 0x2B /* DDVDL Charge Pump Control */
#define MCS_BT3CTR 0x2F /* VGH Charge Pump Control */
#define MCS_BT4CTR 0x34 /* VGL Charge Pump Control */
#define MCS_VCMCTR 0x46 /* VCOM Output Level Control */
#define MCS_SETVGN 0x52 /* VG M/S N Control */
#define MCS_SETVGP 0x54 /* VG M/S P Control */
#define MCS_SW_CTRL 0x5F /* Interface Control for PFM and MIPI */
/* CMD2 P2 commands (GOA Timing Control) - no description in datasheet */
#define GOA_VSTV1 0x00
#define GOA_VSTV2 0x07
#define GOA_VCLK1 0x0E
#define GOA_VCLK2 0x17
#define GOA_VCLK_OPT1 0x20
#define GOA_BICLK1 0x2A
#define GOA_BICLK2 0x37
#define GOA_BICLK3 0x44
#define GOA_BICLK4 0x4F
#define GOA_BICLK_OPT1 0x5B
#define GOA_BICLK_OPT2 0x60
#define MCS_GOA_GPO1 0x6D
#define MCS_GOA_GPO2 0x71
#define MCS_GOA_EQ 0x74
#define MCS_GOA_CLK_GALLON 0x7C
#define MCS_GOA_FS_SEL0 0x7E
#define MCS_GOA_FS_SEL1 0x87
#define MCS_GOA_FS_SEL2 0x91
#define MCS_GOA_FS_SEL3 0x9B
#define MCS_GOA_BS_SEL0 0xAC
#define MCS_GOA_BS_SEL1 0xB5
#define MCS_GOA_BS_SEL2 0xBF
#define MCS_GOA_BS_SEL3 0xC9
#define MCS_GOA_BS_SEL4 0xD3
/* CMD2 P3 commands (Gamma) */
#define MCS_GAMMA_VP 0x60 /* Gamma VP1~VP16 */
#define MCS_GAMMA_VN 0x70 /* Gamma VN1~VN16 */
struct rm68200 {
struct device *dev;
struct drm_panel panel;
struct gpio_desc *reset_gpio;
struct regulator *supply;
bool prepared;
bool enabled;
};
static const struct drm_display_mode default_mode = {
.clock = 54000,
.hdisplay = 720,
.hsync_start = 720 + 48,
.hsync_end = 720 + 48 + 9,
.htotal = 720 + 48 + 9 + 48,
.vdisplay = 1280,
.vsync_start = 1280 + 12,
.vsync_end = 1280 + 12 + 5,
.vtotal = 1280 + 12 + 5 + 12,
.flags = 0,
.width_mm = 68,
.height_mm = 122,
};
static inline struct rm68200 *panel_to_rm68200(struct drm_panel *panel)
{
return container_of(panel, struct rm68200, panel);
}
static void rm68200_dcs_write_buf(struct rm68200 *ctx, const void *data,
size_t len)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int err;
err = mipi_dsi_dcs_write_buffer(dsi, data, len);
if (err < 0)
dev_err_ratelimited(ctx->dev, "MIPI DSI DCS write buffer failed: %d\n", err);
}
static void rm68200_dcs_write_cmd(struct rm68200 *ctx, u8 cmd, u8 value)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int err;
err = mipi_dsi_dcs_write(dsi, cmd, &value, 1);
if (err < 0)
dev_err_ratelimited(ctx->dev, "MIPI DSI DCS write failed: %d\n", err);
}
#define dcs_write_seq(ctx, seq...) \
({ \
static const u8 d[] = { seq }; \
\
rm68200_dcs_write_buf(ctx, d, ARRAY_SIZE(d)); \
})
/*
* This panel is not able to auto-increment all cmd addresses so for some of
* them, we need to send them one by one...
*/
#define dcs_write_cmd_seq(ctx, cmd, seq...) \
({ \
static const u8 d[] = { seq }; \
unsigned int i; \
\
for (i = 0; i < ARRAY_SIZE(d) ; i++) \
rm68200_dcs_write_cmd(ctx, cmd + i, d[i]); \
})
static void rm68200_init_sequence(struct rm68200 *ctx)
{
/* Enter CMD2 with page 0 */
dcs_write_seq(ctx, MCS_CMD_MODE_SW, MCS_CMD2_P0);
dcs_write_cmd_seq(ctx, MCS_EXT_PWR_IC, 0xC0, 0x53, 0x00);
dcs_write_seq(ctx, MCS_BT2CTR, 0xE5);
dcs_write_seq(ctx, MCS_SETAVDD, 0x0A);
dcs_write_seq(ctx, MCS_SETAVEE, 0x0A);
dcs_write_seq(ctx, MCS_SGOPCTR, 0x52);
dcs_write_seq(ctx, MCS_BT3CTR, 0x53);
dcs_write_seq(ctx, MCS_BT4CTR, 0x5A);
dcs_write_seq(ctx, MCS_INVCTR, 0x00);
dcs_write_seq(ctx, MCS_STBCTR, 0x0A);
dcs_write_seq(ctx, MCS_SDCTR, 0x06);
dcs_write_seq(ctx, MCS_VCMCTR, 0x56);
dcs_write_seq(ctx, MCS_SETVGN, 0xA0, 0x00);
dcs_write_seq(ctx, MCS_SETVGP, 0xA0, 0x00);
dcs_write_seq(ctx, MCS_SW_CTRL, 0x11); /* 2 data lanes, see doc */
dcs_write_seq(ctx, MCS_CMD_MODE_SW, MCS_CMD2_P2);
dcs_write_seq(ctx, GOA_VSTV1, 0x05);
dcs_write_seq(ctx, 0x02, 0x0B);
dcs_write_seq(ctx, 0x03, 0x0F);
dcs_write_seq(ctx, 0x04, 0x7D, 0x00, 0x50);
dcs_write_cmd_seq(ctx, GOA_VSTV2, 0x05, 0x16, 0x0D, 0x11, 0x7D, 0x00,
0x50);
dcs_write_cmd_seq(ctx, GOA_VCLK1, 0x07, 0x08, 0x01, 0x02, 0x00, 0x7D,
0x00, 0x85, 0x08);
dcs_write_cmd_seq(ctx, GOA_VCLK2, 0x03, 0x04, 0x05, 0x06, 0x00, 0x7D,
0x00, 0x85, 0x08);
dcs_write_seq(ctx, GOA_VCLK_OPT1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00);
dcs_write_cmd_seq(ctx, GOA_BICLK1, 0x07, 0x08);
dcs_write_seq(ctx, 0x2D, 0x01);
dcs_write_seq(ctx, 0x2F, 0x02, 0x00, 0x40, 0x05, 0x08, 0x54, 0x7D,
0x00);
dcs_write_cmd_seq(ctx, GOA_BICLK2, 0x03, 0x04, 0x05, 0x06, 0x00);
dcs_write_seq(ctx, 0x3D, 0x40);
dcs_write_seq(ctx, 0x3F, 0x05, 0x08, 0x54, 0x7D, 0x00);
dcs_write_seq(ctx, GOA_BICLK3, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_seq(ctx, GOA_BICLK4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00);
dcs_write_seq(ctx, 0x58, 0x00, 0x00, 0x00);
dcs_write_seq(ctx, GOA_BICLK_OPT1, 0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_seq(ctx, GOA_BICLK_OPT2, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
dcs_write_seq(ctx, MCS_GOA_GPO1, 0x00, 0x00, 0x00, 0x00);
dcs_write_seq(ctx, MCS_GOA_GPO2, 0x00, 0x20, 0x00);
dcs_write_seq(ctx, MCS_GOA_EQ, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
0x00, 0x00);
dcs_write_seq(ctx, MCS_GOA_CLK_GALLON, 0x00, 0x00);
dcs_write_cmd_seq(ctx, MCS_GOA_FS_SEL0, 0xBF, 0x02, 0x06, 0x14, 0x10,
0x16, 0x12, 0x08, 0x3F);
dcs_write_cmd_seq(ctx, MCS_GOA_FS_SEL1, 0x3F, 0x3F, 0x3F, 0x3F, 0x0C,
0x0A, 0x0E, 0x3F, 0x3F, 0x00);
dcs_write_cmd_seq(ctx, MCS_GOA_FS_SEL2, 0x04, 0x3F, 0x3F, 0x3F, 0x3F,
0x05, 0x01, 0x3F, 0x3F, 0x0F);
dcs_write_cmd_seq(ctx, MCS_GOA_FS_SEL3, 0x0B, 0x0D, 0x3F, 0x3F, 0x3F,
0x3F);
dcs_write_cmd_seq(ctx, 0xA2, 0x3F, 0x09, 0x13, 0x17, 0x11, 0x15);
dcs_write_cmd_seq(ctx, 0xA9, 0x07, 0x03, 0x3F);
dcs_write_cmd_seq(ctx, MCS_GOA_BS_SEL0, 0x3F, 0x05, 0x01, 0x17, 0x13,
0x15, 0x11, 0x0F, 0x3F);
dcs_write_cmd_seq(ctx, MCS_GOA_BS_SEL1, 0x3F, 0x3F, 0x3F, 0x3F, 0x0B,
0x0D, 0x09, 0x3F, 0x3F, 0x07);
dcs_write_cmd_seq(ctx, MCS_GOA_BS_SEL2, 0x03, 0x3F, 0x3F, 0x3F, 0x3F,
0x02, 0x06, 0x3F, 0x3F, 0x08);
dcs_write_cmd_seq(ctx, MCS_GOA_BS_SEL3, 0x0C, 0x0A, 0x3F, 0x3F, 0x3F,
0x3F, 0x3F, 0x0E, 0x10, 0x14);
dcs_write_cmd_seq(ctx, MCS_GOA_BS_SEL4, 0x12, 0x16, 0x00, 0x04, 0x3F);
dcs_write_seq(ctx, 0xDC, 0x02);
dcs_write_seq(ctx, 0xDE, 0x12);
dcs_write_seq(ctx, MCS_CMD_MODE_SW, 0x0E); /* No documentation */
dcs_write_seq(ctx, 0x01, 0x75);
dcs_write_seq(ctx, MCS_CMD_MODE_SW, MCS_CMD2_P3);
dcs_write_cmd_seq(ctx, MCS_GAMMA_VP, 0x00, 0x0C, 0x12, 0x0E, 0x06,
0x12, 0x0E, 0x0B, 0x15, 0x0B, 0x10, 0x07, 0x0F,
0x12, 0x0C, 0x00);
dcs_write_cmd_seq(ctx, MCS_GAMMA_VN, 0x00, 0x0C, 0x12, 0x0E, 0x06,
0x12, 0x0E, 0x0B, 0x15, 0x0B, 0x10, 0x07, 0x0F,
0x12, 0x0C, 0x00);
/* Exit CMD2 */
dcs_write_seq(ctx, MCS_CMD_MODE_SW, MCS_CMD1_UCS);
}
static int rm68200_disable(struct drm_panel *panel)
{
struct rm68200 *ctx = panel_to_rm68200(panel);
if (!ctx->enabled)
return 0;
ctx->enabled = false;
return 0;
}
static int rm68200_unprepare(struct drm_panel *panel)
{
struct rm68200 *ctx = panel_to_rm68200(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)
dev_warn(panel->dev, "failed to set display off: %d\n", ret);
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret)
dev_warn(panel->dev, "failed to enter sleep mode: %d\n", ret);
msleep(120);
if (ctx->reset_gpio) {
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
msleep(20);
}
regulator_disable(ctx->supply);
ctx->prepared = false;
return 0;
}
static int rm68200_prepare(struct drm_panel *panel)
{
struct rm68200 *ctx = panel_to_rm68200(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
if (ctx->prepared)
return 0;
ret = regulator_enable(ctx->supply);
if (ret < 0) {
dev_err(ctx->dev, "failed to enable supply: %d\n", ret);
return ret;
}
if (ctx->reset_gpio) {
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
msleep(20);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
msleep(100);
}
rm68200_init_sequence(ctx);
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret)
return ret;
msleep(125);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret)
return ret;
msleep(20);
ctx->prepared = true;
return 0;
}
static int rm68200_enable(struct drm_panel *panel)
{
struct rm68200 *ctx = panel_to_rm68200(panel);
if (ctx->enabled)
return 0;
ctx->enabled = true;
return 0;
}
static int rm68200_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &default_mode);
if (!mode) {
dev_err(panel->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;
drm_mode_probed_add(connector, mode);
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
return 1;
}
static const struct drm_panel_funcs rm68200_drm_funcs = {
.disable = rm68200_disable,
.unprepare = rm68200_unprepare,
.prepare = rm68200_prepare,
.enable = rm68200_enable,
.get_modes = rm68200_get_modes,
};
static int rm68200_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct rm68200 *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)) {
ret = PTR_ERR(ctx->reset_gpio);
dev_err(dev, "cannot get reset GPIO: %d\n", ret);
return ret;
}
ctx->supply = devm_regulator_get(dev, "power");
if (IS_ERR(ctx->supply)) {
ret = PTR_ERR(ctx->supply);
if (ret != -EPROBE_DEFER)
dev_err(dev, "cannot get regulator: %d\n", ret);
return ret;
}
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;
dsi->lanes = 2;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS;
drm_panel_init(&ctx->panel, dev, &rm68200_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) {
dev_err(dev, "mipi_dsi_attach() failed: %d\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void rm68200_remove(struct mipi_dsi_device *dsi)
{
struct rm68200 *ctx = mipi_dsi_get_drvdata(dsi);
mipi_dsi_detach(dsi);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id raydium_rm68200_of_match[] = {
{ .compatible = "raydium,rm68200" },
{ }
};
MODULE_DEVICE_TABLE(of, raydium_rm68200_of_match);
static struct mipi_dsi_driver raydium_rm68200_driver = {
.probe = rm68200_probe,
.remove = rm68200_remove,
.driver = {
.name = "panel-raydium-rm68200",
.of_match_table = raydium_rm68200_of_match,
},
};
module_mipi_dsi_driver(raydium_rm68200_driver);
MODULE_AUTHOR("Philippe Cornu <philippe.cornu@st.com>");
MODULE_AUTHOR("Yannick Fertre <yannick.fertre@st.com>");
MODULE_DESCRIPTION("DRM Driver for Raydium RM68200 MIPI DSI panel");
MODULE_LICENSE("GPL v2");
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