diff options
Diffstat (limited to 'drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c | 584 |
1 files changed, 584 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c b/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c new file mode 100644 index 0000000000..f23d8832a1 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c @@ -0,0 +1,584 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Samsung S6D7AA0 MIPI-DSI TFT LCD controller drm_panel driver. + * + * Copyright (C) 2022 Artur Weber <aweber.kernel@gmail.com> + */ + +#include <linux/backlight.h> +#include <linux/delay.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/regulator/consumer.h> +#include <linux/of.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_BL_CTL 0xc3 +#define MCS_OTP_RELOAD 0xd0 +#define MCS_PASSWD1 0xf0 +#define MCS_PASSWD2 0xf1 +#define MCS_PASSWD3 0xfc + +struct s6d7aa0 { + struct drm_panel panel; + struct mipi_dsi_device *dsi; + struct gpio_desc *reset_gpio; + struct regulator_bulk_data supplies[2]; + const struct s6d7aa0_panel_desc *desc; +}; + +struct s6d7aa0_panel_desc { + unsigned int panel_type; + int (*init_func)(struct s6d7aa0 *ctx); + int (*off_func)(struct s6d7aa0 *ctx); + const struct drm_display_mode *drm_mode; + unsigned long mode_flags; + u32 bus_flags; + bool has_backlight; + bool use_passwd3; +}; + +enum s6d7aa0_panels { + S6D7AA0_PANEL_LSL080AL02, + S6D7AA0_PANEL_LSL080AL03, + S6D7AA0_PANEL_LTL101AT01, +}; + +static inline struct s6d7aa0 *panel_to_s6d7aa0(struct drm_panel *panel) +{ + return container_of(panel, struct s6d7aa0, panel); +} + +static void s6d7aa0_reset(struct s6d7aa0 *ctx) +{ + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + msleep(50); + gpiod_set_value_cansleep(ctx->reset_gpio, 0); + msleep(50); +} + +static int s6d7aa0_lock(struct s6d7aa0 *ctx, bool lock) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + + if (lock) { + mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD1, 0xa5, 0xa5); + mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD2, 0xa5, 0xa5); + if (ctx->desc->use_passwd3) + mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD3, 0x5a, 0x5a); + } else { + mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD1, 0x5a, 0x5a); + mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD2, 0x5a, 0x5a); + if (ctx->desc->use_passwd3) + mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD3, 0xa5, 0xa5); + } + + return 0; +} + +static int s6d7aa0_on(struct s6d7aa0 *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + struct device *dev = &dsi->dev; + int ret; + + ret = ctx->desc->init_func(ctx); + if (ret < 0) { + dev_err(dev, "Failed to initialize panel: %d\n", ret); + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + return ret; + } + + ret = mipi_dsi_dcs_set_display_on(dsi); + if (ret < 0) { + dev_err(dev, "Failed to set display on: %d\n", ret); + return ret; + } + + return 0; +} + +static int s6d7aa0_off(struct s6d7aa0 *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + struct device *dev = &dsi->dev; + int ret; + + ret = ctx->desc->off_func(ctx); + if (ret < 0) { + dev_err(dev, "Panel-specific off function failed: %d\n", ret); + return ret; + } + + ret = mipi_dsi_dcs_set_display_off(dsi); + if (ret < 0) { + dev_err(dev, "Failed to set display off: %d\n", ret); + return ret; + } + msleep(64); + + ret = mipi_dsi_dcs_enter_sleep_mode(dsi); + if (ret < 0) { + dev_err(dev, "Failed to enter sleep mode: %d\n", ret); + return ret; + } + msleep(120); + + return 0; +} + +static int s6d7aa0_prepare(struct drm_panel *panel) +{ + struct s6d7aa0 *ctx = panel_to_s6d7aa0(panel); + struct device *dev = &ctx->dsi->dev; + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + if (ret < 0) { + dev_err(dev, "Failed to enable regulators: %d\n", ret); + return ret; + } + + s6d7aa0_reset(ctx); + + ret = s6d7aa0_on(ctx); + if (ret < 0) { + dev_err(dev, "Failed to initialize panel: %d\n", ret); + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + return ret; + } + + return 0; +} + +static int s6d7aa0_disable(struct drm_panel *panel) +{ + struct s6d7aa0 *ctx = panel_to_s6d7aa0(panel); + struct device *dev = &ctx->dsi->dev; + int ret; + + ret = s6d7aa0_off(ctx); + if (ret < 0) + dev_err(dev, "Failed to un-initialize panel: %d\n", ret); + + return 0; +} + +static int s6d7aa0_unprepare(struct drm_panel *panel) +{ + struct s6d7aa0 *ctx = panel_to_s6d7aa0(panel); + + gpiod_set_value_cansleep(ctx->reset_gpio, 1); + regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + + return 0; +} + +/* Backlight control code */ + +static int s6d7aa0_bl_update_status(struct backlight_device *bl) +{ + struct mipi_dsi_device *dsi = bl_get_data(bl); + u16 brightness = backlight_get_brightness(bl); + int ret; + + ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness); + if (ret < 0) + return ret; + + return 0; +} + +static int s6d7aa0_bl_get_brightness(struct backlight_device *bl) +{ + struct mipi_dsi_device *dsi = bl_get_data(bl); + u16 brightness; + int ret; + + ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness); + if (ret < 0) + return ret; + + return brightness & 0xff; +} + +static const struct backlight_ops s6d7aa0_bl_ops = { + .update_status = s6d7aa0_bl_update_status, + .get_brightness = s6d7aa0_bl_get_brightness, +}; + +static struct backlight_device * +s6d7aa0_create_backlight(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + const struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = 255, + .max_brightness = 255, + }; + + return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, + &s6d7aa0_bl_ops, &props); +} + +/* Initialization code and structures for LSL080AL02 panel */ + +static int s6d7aa0_lsl080al02_init(struct s6d7aa0 *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + struct device *dev = &dsi->dev; + int ret; + + usleep_range(20000, 25000); + + ret = s6d7aa0_lock(ctx, false); + if (ret < 0) { + dev_err(dev, "Failed to unlock registers: %d\n", ret); + return ret; + } + + mipi_dsi_dcs_write_seq(dsi, MCS_OTP_RELOAD, 0x00, 0x10); + usleep_range(1000, 1500); + + /* SEQ_B6_PARAM_8_R01 */ + mipi_dsi_dcs_write_seq(dsi, 0xb6, 0x10); + + /* BL_CTL_ON */ + mipi_dsi_dcs_write_seq(dsi, MCS_BL_CTL, 0x40, 0x00, 0x28); + + usleep_range(5000, 6000); + + mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x04); + + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); + if (ret < 0) { + dev_err(dev, "Failed to exit sleep mode: %d\n", ret); + return ret; + } + + msleep(120); + mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x00); + + ret = s6d7aa0_lock(ctx, true); + if (ret < 0) { + dev_err(dev, "Failed to lock registers: %d\n", ret); + return ret; + } + + ret = mipi_dsi_dcs_set_display_on(dsi); + if (ret < 0) { + dev_err(dev, "Failed to set display on: %d\n", ret); + return ret; + } + + return 0; +} + +static int s6d7aa0_lsl080al02_off(struct s6d7aa0 *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + + /* BL_CTL_OFF */ + mipi_dsi_dcs_write_seq(dsi, MCS_BL_CTL, 0x40, 0x00, 0x20); + + return 0; +} + +static const struct drm_display_mode s6d7aa0_lsl080al02_mode = { + .clock = (800 + 16 + 4 + 140) * (1280 + 8 + 4 + 4) * 60 / 1000, + .hdisplay = 800, + .hsync_start = 800 + 16, + .hsync_end = 800 + 16 + 4, + .htotal = 800 + 16 + 4 + 140, + .vdisplay = 1280, + .vsync_start = 1280 + 8, + .vsync_end = 1280 + 8 + 4, + .vtotal = 1280 + 8 + 4 + 4, + .width_mm = 108, + .height_mm = 173, +}; + +static const struct s6d7aa0_panel_desc s6d7aa0_lsl080al02_desc = { + .panel_type = S6D7AA0_PANEL_LSL080AL02, + .init_func = s6d7aa0_lsl080al02_init, + .off_func = s6d7aa0_lsl080al02_off, + .drm_mode = &s6d7aa0_lsl080al02_mode, + .mode_flags = MIPI_DSI_MODE_VSYNC_FLUSH | MIPI_DSI_MODE_VIDEO_NO_HFP, + .bus_flags = 0, + + .has_backlight = false, + .use_passwd3 = false, +}; + +/* Initialization code and structures for LSL080AL03 panel */ + +static int s6d7aa0_lsl080al03_init(struct s6d7aa0 *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + struct device *dev = &dsi->dev; + int ret; + + usleep_range(20000, 25000); + + ret = s6d7aa0_lock(ctx, false); + if (ret < 0) { + dev_err(dev, "Failed to unlock registers: %d\n", ret); + return ret; + } + + if (ctx->desc->panel_type == S6D7AA0_PANEL_LSL080AL03) { + mipi_dsi_dcs_write_seq(dsi, MCS_BL_CTL, 0xc7, 0x00, 0x29); + mipi_dsi_dcs_write_seq(dsi, 0xbc, 0x01, 0x4e, 0xa0); + mipi_dsi_dcs_write_seq(dsi, 0xfd, 0x16, 0x10, 0x11, 0x23, + 0x09); + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00, 0x02, 0x03, 0x21, + 0x80, 0x78); + } else if (ctx->desc->panel_type == S6D7AA0_PANEL_LTL101AT01) { + mipi_dsi_dcs_write_seq(dsi, MCS_BL_CTL, 0x40, 0x00, 0x08); + mipi_dsi_dcs_write_seq(dsi, 0xbc, 0x01, 0x4e, 0x0b); + mipi_dsi_dcs_write_seq(dsi, 0xfd, 0x16, 0x10, 0x11, 0x23, + 0x09); + mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00, 0x02, 0x03, 0x21, + 0x80, 0x68); + } + + mipi_dsi_dcs_write_seq(dsi, 0xb3, 0x51); + mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24); + mipi_dsi_dcs_write_seq(dsi, 0xf2, 0x02, 0x08, 0x08); + + usleep_range(10000, 11000); + + mipi_dsi_dcs_write_seq(dsi, 0xc0, 0x80, 0x80, 0x30); + mipi_dsi_dcs_write_seq(dsi, 0xcd, + 0x2e, 0x2e, 0x2e, 0x2e, 0x2e, 0x2e, 0x2e, 0x2e, + 0x2e, 0x2e, 0x2e, 0x2e, 0x2e); + mipi_dsi_dcs_write_seq(dsi, 0xce, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00); + mipi_dsi_dcs_write_seq(dsi, 0xc1, 0x03); + + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); + if (ret < 0) { + dev_err(dev, "Failed to exit sleep mode: %d\n", ret); + return ret; + } + + ret = s6d7aa0_lock(ctx, true); + if (ret < 0) { + dev_err(dev, "Failed to lock registers: %d\n", ret); + return ret; + } + + ret = mipi_dsi_dcs_set_display_on(dsi); + if (ret < 0) { + dev_err(dev, "Failed to set display on: %d\n", ret); + return ret; + } + + return 0; +} + +static int s6d7aa0_lsl080al03_off(struct s6d7aa0 *ctx) +{ + struct mipi_dsi_device *dsi = ctx->dsi; + + mipi_dsi_dcs_write_seq(dsi, 0x22, 0x00); + + return 0; +} + +static const struct drm_display_mode s6d7aa0_lsl080al03_mode = { + .clock = (768 + 18 + 16 + 126) * (1024 + 8 + 2 + 6) * 60 / 1000, + .hdisplay = 768, + .hsync_start = 768 + 18, + .hsync_end = 768 + 18 + 16, + .htotal = 768 + 18 + 16 + 126, + .vdisplay = 1024, + .vsync_start = 1024 + 8, + .vsync_end = 1024 + 8 + 2, + .vtotal = 1024 + 8 + 2 + 6, + .width_mm = 122, + .height_mm = 163, +}; + +static const struct s6d7aa0_panel_desc s6d7aa0_lsl080al03_desc = { + .panel_type = S6D7AA0_PANEL_LSL080AL03, + .init_func = s6d7aa0_lsl080al03_init, + .off_func = s6d7aa0_lsl080al03_off, + .drm_mode = &s6d7aa0_lsl080al03_mode, + .mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET, + .bus_flags = 0, + + .has_backlight = true, + .use_passwd3 = true, +}; + +/* Initialization structures for LTL101AT01 panel */ + +static const struct drm_display_mode s6d7aa0_ltl101at01_mode = { + .clock = (768 + 96 + 16 + 184) * (1024 + 8 + 2 + 6) * 60 / 1000, + .hdisplay = 768, + .hsync_start = 768 + 96, + .hsync_end = 768 + 96 + 16, + .htotal = 768 + 96 + 16 + 184, + .vdisplay = 1024, + .vsync_start = 1024 + 8, + .vsync_end = 1024 + 8 + 2, + .vtotal = 1024 + 8 + 2 + 6, + .width_mm = 148, + .height_mm = 197, +}; + +static const struct s6d7aa0_panel_desc s6d7aa0_ltl101at01_desc = { + .panel_type = S6D7AA0_PANEL_LTL101AT01, + .init_func = s6d7aa0_lsl080al03_init, /* Similar init to LSL080AL03 */ + .off_func = s6d7aa0_lsl080al03_off, + .drm_mode = &s6d7aa0_ltl101at01_mode, + .mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET, + .bus_flags = 0, + + .has_backlight = true, + .use_passwd3 = true, +}; + +static int s6d7aa0_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct drm_display_mode *mode; + struct s6d7aa0 *ctx; + + ctx = container_of(panel, struct s6d7aa0, panel); + if (!ctx) + return -EINVAL; + + mode = drm_mode_duplicate(connector->dev, ctx->desc->drm_mode); + if (!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; + connector->display_info.bus_flags = ctx->desc->bus_flags; + drm_mode_probed_add(connector, mode); + + return 1; +} + +static const struct drm_panel_funcs s6d7aa0_panel_funcs = { + .disable = s6d7aa0_disable, + .prepare = s6d7aa0_prepare, + .unprepare = s6d7aa0_unprepare, + .get_modes = s6d7aa0_get_modes, +}; + +static int s6d7aa0_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct s6d7aa0 *ctx; + int ret; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->desc = of_device_get_match_data(dev); + if (!ctx->desc) + return -ENODEV; + + ctx->supplies[0].supply = "power"; + ctx->supplies[1].supply = "vmipi"; + 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_HIGH); + if (IS_ERR(ctx->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio), + "Failed to get reset-gpios\n"); + + ctx->dsi = dsi; + mipi_dsi_set_drvdata(dsi, ctx); + + dsi->lanes = 4; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST + | ctx->desc->mode_flags; + + drm_panel_init(&ctx->panel, dev, &s6d7aa0_panel_funcs, + DRM_MODE_CONNECTOR_DSI); + ctx->panel.prepare_prev_first = true; + + ret = drm_panel_of_backlight(&ctx->panel); + if (ret) + return dev_err_probe(dev, ret, "Failed to get backlight\n"); + + /* Use DSI-based backlight as fallback if available */ + if (ctx->desc->has_backlight && !ctx->panel.backlight) { + ctx->panel.backlight = s6d7aa0_create_backlight(dsi); + if (IS_ERR(ctx->panel.backlight)) + return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight), + "Failed to create backlight\n"); + } + + drm_panel_add(&ctx->panel); + + ret = mipi_dsi_attach(dsi); + if (ret < 0) { + dev_err(dev, "Failed to attach to DSI host: %d\n", ret); + drm_panel_remove(&ctx->panel); + return ret; + } + + return 0; +} + +static void s6d7aa0_remove(struct mipi_dsi_device *dsi) +{ + struct s6d7aa0 *ctx = mipi_dsi_get_drvdata(dsi); + int ret; + + 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 s6d7aa0_of_match[] = { + { + .compatible = "samsung,lsl080al02", + .data = &s6d7aa0_lsl080al02_desc + }, + { + .compatible = "samsung,lsl080al03", + .data = &s6d7aa0_lsl080al03_desc + }, + { + .compatible = "samsung,ltl101at01", + .data = &s6d7aa0_ltl101at01_desc + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, s6d7aa0_of_match); + +static struct mipi_dsi_driver s6d7aa0_driver = { + .probe = s6d7aa0_probe, + .remove = s6d7aa0_remove, + .driver = { + .name = "panel-samsung-s6d7aa0", + .of_match_table = s6d7aa0_of_match, + }, +}; +module_mipi_dsi_driver(s6d7aa0_driver); + +MODULE_AUTHOR("Artur Weber <aweber.kernel@gmail.com>"); +MODULE_DESCRIPTION("Samsung S6D7AA0 MIPI-DSI LCD controller driver"); +MODULE_LICENSE("GPL"); |