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linux/drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.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-only
/*
* MIPI-DSI based S6E63J0X03 AMOLED lcd 1.63 inch panel driver.
*
* Copyright (c) 2014-2017 Samsung Electronics Co., Ltd
*
* Inki Dae <inki.dae@samsung.com>
* Hoegeun Kwon <hoegeun.kwon@samsung.com>
*/
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.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>
#define MCS_LEVEL2_KEY 0xf0
#define MCS_MTP_KEY 0xf1
#define MCS_MTP_SET3 0xd4
#define MAX_BRIGHTNESS 100
#define DEFAULT_BRIGHTNESS 80
#define NUM_GAMMA_STEPS 9
#define GAMMA_CMD_CNT 28
#define FIRST_COLUMN 20
struct s6e63j0x03 {
struct device *dev;
struct drm_panel panel;
struct backlight_device *bl_dev;
struct regulator_bulk_data supplies[2];
struct gpio_desc *reset_gpio;
};
static const struct drm_display_mode default_mode = {
.clock = 4649,
.hdisplay = 320,
.hsync_start = 320 + 1,
.hsync_end = 320 + 1 + 1,
.htotal = 320 + 1 + 1 + 1,
.vdisplay = 320,
.vsync_start = 320 + 150,
.vsync_end = 320 + 150 + 1,
.vtotal = 320 + 150 + 1 + 2,
.flags = 0,
};
static const unsigned char gamma_tbl[NUM_GAMMA_STEPS][GAMMA_CMD_CNT] = {
{ /* Gamma 10 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x7f, 0x7f, 0x7f, 0x52, 0x6b, 0x6f, 0x26,
0x28, 0x2d, 0x28, 0x26, 0x27, 0x33, 0x34, 0x32, 0x36, 0x36,
0x35, 0x00, 0xab, 0x00, 0xae, 0x00, 0xbf
},
{ /* gamma 30 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x70, 0x7f, 0x7f, 0x4e, 0x64, 0x69, 0x26,
0x27, 0x2a, 0x28, 0x29, 0x27, 0x31, 0x32, 0x31, 0x35, 0x34,
0x35, 0x00, 0xc4, 0x00, 0xca, 0x00, 0xdc
},
{ /* gamma 60 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x65, 0x7b, 0x7d, 0x5f, 0x67, 0x68, 0x2a,
0x28, 0x29, 0x28, 0x2a, 0x27, 0x31, 0x2f, 0x30, 0x34, 0x33,
0x34, 0x00, 0xd9, 0x00, 0xe4, 0x00, 0xf5
},
{ /* gamma 90 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x4d, 0x6f, 0x71, 0x67, 0x6a, 0x6c, 0x29,
0x28, 0x28, 0x28, 0x29, 0x27, 0x30, 0x2e, 0x30, 0x32, 0x31,
0x31, 0x00, 0xea, 0x00, 0xf6, 0x01, 0x09
},
{ /* gamma 120 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x3d, 0x66, 0x68, 0x69, 0x69, 0x69, 0x28,
0x28, 0x27, 0x28, 0x28, 0x27, 0x30, 0x2e, 0x2f, 0x31, 0x31,
0x30, 0x00, 0xf9, 0x01, 0x05, 0x01, 0x1b
},
{ /* gamma 150 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x31, 0x51, 0x53, 0x66, 0x66, 0x67, 0x28,
0x29, 0x27, 0x28, 0x27, 0x27, 0x2e, 0x2d, 0x2e, 0x31, 0x31,
0x30, 0x01, 0x04, 0x01, 0x11, 0x01, 0x29
},
{ /* gamma 200 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x2f, 0x4f, 0x51, 0x67, 0x65, 0x65, 0x29,
0x2a, 0x28, 0x27, 0x25, 0x26, 0x2d, 0x2c, 0x2c, 0x30, 0x30,
0x30, 0x01, 0x14, 0x01, 0x23, 0x01, 0x3b
},
{ /* gamma 240 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x2c, 0x4d, 0x50, 0x65, 0x63, 0x64, 0x2a,
0x2c, 0x29, 0x26, 0x24, 0x25, 0x2c, 0x2b, 0x2b, 0x30, 0x30,
0x30, 0x01, 0x1e, 0x01, 0x2f, 0x01, 0x47
},
{ /* gamma 300 */
MCS_MTP_SET3,
0x00, 0x00, 0x00, 0x38, 0x61, 0x64, 0x65, 0x63, 0x64, 0x28,
0x2a, 0x27, 0x26, 0x23, 0x25, 0x2b, 0x2b, 0x2a, 0x30, 0x2f,
0x30, 0x01, 0x2d, 0x01, 0x3f, 0x01, 0x57
}
};
static inline struct s6e63j0x03 *panel_to_s6e63j0x03(struct drm_panel *panel)
{
return container_of(panel, struct s6e63j0x03, panel);
}
static inline ssize_t s6e63j0x03_dcs_write_seq(struct s6e63j0x03 *ctx,
const void *seq, size_t len)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
return mipi_dsi_dcs_write_buffer(dsi, seq, len);
}
#define s6e63j0x03_dcs_write_seq_static(ctx, seq...) \
({ \
static const u8 d[] = { seq }; \
s6e63j0x03_dcs_write_seq(ctx, d, ARRAY_SIZE(d)); \
})
static inline int s6e63j0x03_enable_lv2_command(struct s6e63j0x03 *ctx)
{
return s6e63j0x03_dcs_write_seq_static(ctx, MCS_LEVEL2_KEY, 0x5a, 0x5a);
}
static inline int s6e63j0x03_apply_mtp_key(struct s6e63j0x03 *ctx, bool on)
{
if (on)
return s6e63j0x03_dcs_write_seq_static(ctx,
MCS_MTP_KEY, 0x5a, 0x5a);
return s6e63j0x03_dcs_write_seq_static(ctx, MCS_MTP_KEY, 0xa5, 0xa5);
}
static int s6e63j0x03_power_on(struct s6e63j0x03 *ctx)
{
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0)
return ret;
msleep(30);
gpiod_set_value(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value(ctx->reset_gpio, 0);
usleep_range(5000, 6000);
return 0;
}
static int s6e63j0x03_power_off(struct s6e63j0x03 *ctx)
{
return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
}
static unsigned int s6e63j0x03_get_brightness_index(unsigned int brightness)
{
unsigned int index;
index = brightness / (MAX_BRIGHTNESS / NUM_GAMMA_STEPS);
if (index >= NUM_GAMMA_STEPS)
index = NUM_GAMMA_STEPS - 1;
return index;
}
static int s6e63j0x03_update_gamma(struct s6e63j0x03 *ctx,
unsigned int brightness)
{
struct backlight_device *bl_dev = ctx->bl_dev;
unsigned int index = s6e63j0x03_get_brightness_index(brightness);
int ret;
ret = s6e63j0x03_apply_mtp_key(ctx, true);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq(ctx, gamma_tbl[index], GAMMA_CMD_CNT);
if (ret < 0)
return ret;
ret = s6e63j0x03_apply_mtp_key(ctx, false);
if (ret < 0)
return ret;
bl_dev->props.brightness = brightness;
return 0;
}
static int s6e63j0x03_set_brightness(struct backlight_device *bl_dev)
{
struct s6e63j0x03 *ctx = bl_get_data(bl_dev);
unsigned int brightness = bl_dev->props.brightness;
return s6e63j0x03_update_gamma(ctx, brightness);
}
static const struct backlight_ops s6e63j0x03_bl_ops = {
.update_status = s6e63j0x03_set_brightness,
};
static int s6e63j0x03_disable(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0)
return ret;
ctx->bl_dev->props.power = FB_BLANK_NORMAL;
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0)
return ret;
msleep(120);
return 0;
}
static int s6e63j0x03_unprepare(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
int ret;
ret = s6e63j0x03_power_off(ctx);
if (ret < 0)
return ret;
ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
return 0;
}
static int s6e63j0x03_panel_init(struct s6e63j0x03 *ctx)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
ret = s6e63j0x03_enable_lv2_command(ctx);
if (ret < 0)
return ret;
ret = s6e63j0x03_apply_mtp_key(ctx, true);
if (ret < 0)
return ret;
/* set porch adjustment */
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf2, 0x1c, 0x28);
if (ret < 0)
return ret;
/* set frame freq */
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb5, 0x00, 0x02, 0x00);
if (ret < 0)
return ret;
/* set caset, paset */
ret = mipi_dsi_dcs_set_column_address(dsi, FIRST_COLUMN,
default_mode.hdisplay - 1 + FIRST_COLUMN);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_page_address(dsi, 0, default_mode.vdisplay - 1);
if (ret < 0)
return ret;
/* set ltps timming 0, 1 */
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf8, 0x08, 0x08, 0x08, 0x17,
0x00, 0x2a, 0x02, 0x26, 0x00, 0x00, 0x02, 0x00, 0x00);
if (ret < 0)
return ret;
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xf7, 0x02);
if (ret < 0)
return ret;
/* set param pos te_edge */
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb0, 0x01);
if (ret < 0)
return ret;
/* set te rising edge */
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xe2, 0x0f);
if (ret < 0)
return ret;
/* set param pos default */
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb0, 0x00);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0)
return ret;
ret = s6e63j0x03_apply_mtp_key(ctx, false);
if (ret < 0)
return ret;
return 0;
}
static int s6e63j0x03_prepare(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
int ret;
ret = s6e63j0x03_power_on(ctx);
if (ret < 0)
return ret;
ret = s6e63j0x03_panel_init(ctx);
if (ret < 0)
goto err;
ctx->bl_dev->props.power = FB_BLANK_NORMAL;
return 0;
err:
s6e63j0x03_power_off(ctx);
return ret;
}
static int s6e63j0x03_enable(struct drm_panel *panel)
{
struct s6e63j0x03 *ctx = panel_to_s6e63j0x03(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
int ret;
msleep(120);
ret = s6e63j0x03_apply_mtp_key(ctx, true);
if (ret < 0)
return ret;
/* set elvss_cond */
ret = s6e63j0x03_dcs_write_seq_static(ctx, 0xb1, 0x00, 0x09);
if (ret < 0)
return ret;
/* set pos */
ret = s6e63j0x03_dcs_write_seq_static(ctx,
MIPI_DCS_SET_ADDRESS_MODE, 0x40);
if (ret < 0)
return ret;
/* set default white brightness */
ret = mipi_dsi_dcs_set_display_brightness(dsi, 0x00ff);
if (ret < 0)
return ret;
/* set white ctrl */
ret = s6e63j0x03_dcs_write_seq_static(ctx,
MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
if (ret < 0)
return ret;
/* set acl off */
ret = s6e63j0x03_dcs_write_seq_static(ctx,
MIPI_DCS_WRITE_POWER_SAVE, 0x00);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
if (ret < 0)
return ret;
ret = s6e63j0x03_apply_mtp_key(ctx, false);
if (ret < 0)
return ret;
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0)
return ret;
ctx->bl_dev->props.power = FB_BLANK_UNBLANK;
return 0;
}
static int s6e63j0x03_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 = 29;
connector->display_info.height_mm = 29;
return 1;
}
static const struct drm_panel_funcs s6e63j0x03_funcs = {
.disable = s6e63j0x03_disable,
.unprepare = s6e63j0x03_unprepare,
.prepare = s6e63j0x03_prepare,
.enable = s6e63j0x03_enable,
.get_modes = s6e63j0x03_get_modes,
};
static int s6e63j0x03_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct s6e63j0x03 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(struct s6e63j0x03), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dev = dev;
dsi->lanes = 1;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET;
ctx->supplies[0].supply = "vdd3";
ctx->supplies[1].supply = "vci";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
ctx->supplies);
if (ret < 0)
return dev_err_probe(dev, ret, "failed to get regulators\n");
ctx->reset_gpio = devm_gpiod_get(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");
drm_panel_init(&ctx->panel, dev, &s6e63j0x03_funcs,
DRM_MODE_CONNECTOR_DSI);
ctx->bl_dev = backlight_device_register("s6e63j0x03", dev, ctx,
&s6e63j0x03_bl_ops, NULL);
if (IS_ERR(ctx->bl_dev))
return dev_err_probe(dev, PTR_ERR(ctx->bl_dev),
"failed to register backlight device\n");
ctx->bl_dev->props.max_brightness = MAX_BRIGHTNESS;
ctx->bl_dev->props.brightness = DEFAULT_BRIGHTNESS;
ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0)
goto remove_panel;
return ret;
remove_panel:
drm_panel_remove(&ctx->panel);
backlight_device_unregister(ctx->bl_dev);
return ret;
}
static void s6e63j0x03_remove(struct mipi_dsi_device *dsi)
{
struct s6e63j0x03 *ctx = mipi_dsi_get_drvdata(dsi);
mipi_dsi_detach(dsi);
drm_panel_remove(&ctx->panel);
backlight_device_unregister(ctx->bl_dev);
}
static const struct of_device_id s6e63j0x03_of_match[] = {
{ .compatible = "samsung,s6e63j0x03" },
{ }
};
MODULE_DEVICE_TABLE(of, s6e63j0x03_of_match);
static struct mipi_dsi_driver s6e63j0x03_driver = {
.probe = s6e63j0x03_probe,
.remove = s6e63j0x03_remove,
.driver = {
.name = "panel_samsung_s6e63j0x03",
.of_match_table = s6e63j0x03_of_match,
},
};
module_mipi_dsi_driver(s6e63j0x03_driver);
MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_AUTHOR("Hoegeun Kwon <hoegeun.kwon@samsung.com>");
MODULE_DESCRIPTION("MIPI-DSI based s6e63j0x03 AMOLED LCD Panel Driver");
MODULE_LICENSE("GPL v2");
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