587 lines
14 KiB
C
587 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Samsung S6D7AA0 MIPI-DSI TFT LCD controller drm_panel driver.
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*
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* Copyright (C) 2022 Artur Weber <aweber.kernel@gmail.com>
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*/
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#include <linux/backlight.h>
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/regulator/consumer.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <video/mipi_display.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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/* Manufacturer command set */
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#define MCS_BL_CTL 0xc3
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#define MCS_OTP_RELOAD 0xd0
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#define MCS_PASSWD1 0xf0
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#define MCS_PASSWD2 0xf1
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#define MCS_PASSWD3 0xfc
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struct s6d7aa0 {
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struct drm_panel panel;
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struct mipi_dsi_device *dsi;
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struct gpio_desc *reset_gpio;
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struct regulator_bulk_data supplies[2];
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const struct s6d7aa0_panel_desc *desc;
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};
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struct s6d7aa0_panel_desc {
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unsigned int panel_type;
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int (*init_func)(struct s6d7aa0 *ctx);
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int (*off_func)(struct s6d7aa0 *ctx);
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const struct drm_display_mode *drm_mode;
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unsigned long mode_flags;
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u32 bus_flags;
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bool has_backlight;
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bool use_passwd3;
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};
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enum s6d7aa0_panels {
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S6D7AA0_PANEL_LSL080AL02,
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S6D7AA0_PANEL_LSL080AL03,
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S6D7AA0_PANEL_LTL101AT01,
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};
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static inline struct s6d7aa0 *panel_to_s6d7aa0(struct drm_panel *panel)
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{
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return container_of(panel, struct s6d7aa0, panel);
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}
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static void s6d7aa0_reset(struct s6d7aa0 *ctx)
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{
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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msleep(50);
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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msleep(50);
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}
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static int s6d7aa0_lock(struct s6d7aa0 *ctx, bool lock)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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int ret = 0;
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if (lock) {
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mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD1, 0xa5, 0xa5);
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mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD2, 0xa5, 0xa5);
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if (ctx->desc->use_passwd3)
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mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD3, 0x5a, 0x5a);
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} else {
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mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD1, 0x5a, 0x5a);
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mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD2, 0x5a, 0x5a);
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if (ctx->desc->use_passwd3)
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mipi_dsi_dcs_write_seq(dsi, MCS_PASSWD3, 0xa5, 0xa5);
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}
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return ret;
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}
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static int s6d7aa0_on(struct s6d7aa0 *ctx)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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struct device *dev = &dsi->dev;
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int ret;
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ret = ctx->desc->init_func(ctx);
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if (ret < 0) {
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dev_err(dev, "Failed to initialize panel: %d\n", ret);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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return ret;
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}
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ret = mipi_dsi_dcs_set_display_on(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to set display on: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int s6d7aa0_off(struct s6d7aa0 *ctx)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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struct device *dev = &dsi->dev;
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int ret;
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ret = ctx->desc->off_func(ctx);
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if (ret < 0) {
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dev_err(dev, "Panel-specific off function failed: %d\n", ret);
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return ret;
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}
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ret = mipi_dsi_dcs_set_display_off(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to set display off: %d\n", ret);
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return ret;
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}
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msleep(64);
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ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
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return ret;
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}
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msleep(120);
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return 0;
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}
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static int s6d7aa0_prepare(struct drm_panel *panel)
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{
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struct s6d7aa0 *ctx = panel_to_s6d7aa0(panel);
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struct device *dev = &ctx->dsi->dev;
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int ret;
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ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
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if (ret < 0) {
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dev_err(dev, "Failed to enable regulators: %d\n", ret);
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return ret;
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}
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s6d7aa0_reset(ctx);
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ret = s6d7aa0_on(ctx);
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if (ret < 0) {
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dev_err(dev, "Failed to initialize panel: %d\n", ret);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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return ret;
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}
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return 0;
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}
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static int s6d7aa0_disable(struct drm_panel *panel)
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{
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struct s6d7aa0 *ctx = panel_to_s6d7aa0(panel);
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struct device *dev = &ctx->dsi->dev;
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int ret;
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ret = s6d7aa0_off(ctx);
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if (ret < 0)
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dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
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return 0;
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}
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static int s6d7aa0_unprepare(struct drm_panel *panel)
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{
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struct s6d7aa0 *ctx = panel_to_s6d7aa0(panel);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
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return 0;
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}
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/* Backlight control code */
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static int s6d7aa0_bl_update_status(struct backlight_device *bl)
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{
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struct mipi_dsi_device *dsi = bl_get_data(bl);
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u16 brightness = backlight_get_brightness(bl);
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int ret;
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ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int s6d7aa0_bl_get_brightness(struct backlight_device *bl)
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{
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struct mipi_dsi_device *dsi = bl_get_data(bl);
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u16 brightness;
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int ret;
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ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
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if (ret < 0)
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return ret;
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return brightness & 0xff;
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}
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static const struct backlight_ops s6d7aa0_bl_ops = {
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.update_status = s6d7aa0_bl_update_status,
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.get_brightness = s6d7aa0_bl_get_brightness,
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};
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static struct backlight_device *
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s6d7aa0_create_backlight(struct mipi_dsi_device *dsi)
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{
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struct device *dev = &dsi->dev;
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const struct backlight_properties props = {
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.type = BACKLIGHT_RAW,
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.brightness = 255,
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.max_brightness = 255,
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};
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return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
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&s6d7aa0_bl_ops, &props);
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}
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/* Initialization code and structures for LSL080AL02 panel */
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static int s6d7aa0_lsl080al02_init(struct s6d7aa0 *ctx)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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struct device *dev = &dsi->dev;
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int ret;
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usleep_range(20000, 25000);
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ret = s6d7aa0_lock(ctx, false);
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if (ret < 0) {
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dev_err(dev, "Failed to unlock registers: %d\n", ret);
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return ret;
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}
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mipi_dsi_dcs_write_seq(dsi, MCS_OTP_RELOAD, 0x00, 0x10);
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usleep_range(1000, 1500);
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/* SEQ_B6_PARAM_8_R01 */
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mipi_dsi_dcs_write_seq(dsi, 0xb6, 0x10);
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/* BL_CTL_ON */
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mipi_dsi_dcs_write_seq(dsi, MCS_BL_CTL, 0x40, 0x00, 0x28);
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usleep_range(5000, 6000);
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mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x04);
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ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
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return ret;
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}
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msleep(120);
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mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
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ret = s6d7aa0_lock(ctx, true);
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if (ret < 0) {
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dev_err(dev, "Failed to lock registers: %d\n", ret);
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return ret;
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}
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ret = mipi_dsi_dcs_set_display_on(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to set display on: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int s6d7aa0_lsl080al02_off(struct s6d7aa0 *ctx)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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/* BL_CTL_OFF */
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mipi_dsi_dcs_write_seq(dsi, MCS_BL_CTL, 0x40, 0x00, 0x20);
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return 0;
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}
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static const struct drm_display_mode s6d7aa0_lsl080al02_mode = {
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.clock = (800 + 16 + 4 + 140) * (1280 + 8 + 4 + 4) * 60 / 1000,
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.hdisplay = 800,
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.hsync_start = 800 + 16,
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.hsync_end = 800 + 16 + 4,
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.htotal = 800 + 16 + 4 + 140,
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.vdisplay = 1280,
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.vsync_start = 1280 + 8,
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.vsync_end = 1280 + 8 + 4,
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.vtotal = 1280 + 8 + 4 + 4,
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.width_mm = 108,
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.height_mm = 173,
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};
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static const struct s6d7aa0_panel_desc s6d7aa0_lsl080al02_desc = {
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.panel_type = S6D7AA0_PANEL_LSL080AL02,
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.init_func = s6d7aa0_lsl080al02_init,
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.off_func = s6d7aa0_lsl080al02_off,
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.drm_mode = &s6d7aa0_lsl080al02_mode,
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.mode_flags = MIPI_DSI_MODE_VSYNC_FLUSH | MIPI_DSI_MODE_VIDEO_NO_HFP,
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.bus_flags = DRM_BUS_FLAG_DE_HIGH,
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.has_backlight = false,
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.use_passwd3 = false,
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};
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/* Initialization code and structures for LSL080AL03 panel */
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static int s6d7aa0_lsl080al03_init(struct s6d7aa0 *ctx)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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struct device *dev = &dsi->dev;
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int ret;
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usleep_range(20000, 25000);
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ret = s6d7aa0_lock(ctx, false);
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if (ret < 0) {
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dev_err(dev, "Failed to unlock registers: %d\n", ret);
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return ret;
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}
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if (ctx->desc->panel_type == S6D7AA0_PANEL_LSL080AL03) {
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mipi_dsi_dcs_write_seq(dsi, MCS_BL_CTL, 0xc7, 0x00, 0x29);
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mipi_dsi_dcs_write_seq(dsi, 0xbc, 0x01, 0x4e, 0xa0);
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mipi_dsi_dcs_write_seq(dsi, 0xfd, 0x16, 0x10, 0x11, 0x23,
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0x09);
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mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00, 0x02, 0x03, 0x21,
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0x80, 0x78);
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} else if (ctx->desc->panel_type == S6D7AA0_PANEL_LTL101AT01) {
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mipi_dsi_dcs_write_seq(dsi, MCS_BL_CTL, 0x40, 0x00, 0x08);
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mipi_dsi_dcs_write_seq(dsi, 0xbc, 0x01, 0x4e, 0x0b);
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mipi_dsi_dcs_write_seq(dsi, 0xfd, 0x16, 0x10, 0x11, 0x23,
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0x09);
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mipi_dsi_dcs_write_seq(dsi, 0xfe, 0x00, 0x02, 0x03, 0x21,
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0x80, 0x68);
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}
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mipi_dsi_dcs_write_seq(dsi, 0xb3, 0x51);
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mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24);
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mipi_dsi_dcs_write_seq(dsi, 0xf2, 0x02, 0x08, 0x08);
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usleep_range(10000, 11000);
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mipi_dsi_dcs_write_seq(dsi, 0xc0, 0x80, 0x80, 0x30);
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mipi_dsi_dcs_write_seq(dsi, 0xcd,
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0x2e, 0x2e, 0x2e, 0x2e, 0x2e, 0x2e, 0x2e, 0x2e,
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0x2e, 0x2e, 0x2e, 0x2e, 0x2e);
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mipi_dsi_dcs_write_seq(dsi, 0xce,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00);
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mipi_dsi_dcs_write_seq(dsi, 0xc1, 0x03);
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ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
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return ret;
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}
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ret = s6d7aa0_lock(ctx, true);
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if (ret < 0) {
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dev_err(dev, "Failed to lock registers: %d\n", ret);
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return ret;
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}
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ret = mipi_dsi_dcs_set_display_on(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to set display on: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int s6d7aa0_lsl080al03_off(struct s6d7aa0 *ctx)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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mipi_dsi_dcs_write_seq(dsi, 0x22, 0x00);
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return 0;
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}
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static const struct drm_display_mode s6d7aa0_lsl080al03_mode = {
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.clock = (768 + 18 + 16 + 126) * (1024 + 8 + 2 + 6) * 60 / 1000,
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.hdisplay = 768,
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.hsync_start = 768 + 18,
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.hsync_end = 768 + 18 + 16,
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.htotal = 768 + 18 + 16 + 126,
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.vdisplay = 1024,
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.vsync_start = 1024 + 8,
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.vsync_end = 1024 + 8 + 2,
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.vtotal = 1024 + 8 + 2 + 6,
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.width_mm = 122,
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.height_mm = 163,
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};
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static const struct s6d7aa0_panel_desc s6d7aa0_lsl080al03_desc = {
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.panel_type = S6D7AA0_PANEL_LSL080AL03,
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.init_func = s6d7aa0_lsl080al03_init,
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.off_func = s6d7aa0_lsl080al03_off,
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.drm_mode = &s6d7aa0_lsl080al03_mode,
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.mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET,
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.bus_flags = 0,
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.has_backlight = true,
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.use_passwd3 = true,
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};
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/* Initialization structures for LTL101AT01 panel */
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static const struct drm_display_mode s6d7aa0_ltl101at01_mode = {
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.clock = (768 + 96 + 16 + 184) * (1024 + 8 + 2 + 6) * 60 / 1000,
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.hdisplay = 768,
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.hsync_start = 768 + 96,
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.hsync_end = 768 + 96 + 16,
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.htotal = 768 + 96 + 16 + 184,
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.vdisplay = 1024,
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.vsync_start = 1024 + 8,
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.vsync_end = 1024 + 8 + 2,
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.vtotal = 1024 + 8 + 2 + 6,
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.width_mm = 148,
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.height_mm = 197,
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};
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static const struct s6d7aa0_panel_desc s6d7aa0_ltl101at01_desc = {
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.panel_type = S6D7AA0_PANEL_LTL101AT01,
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.init_func = s6d7aa0_lsl080al03_init, /* Similar init to LSL080AL03 */
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.off_func = s6d7aa0_lsl080al03_off,
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.drm_mode = &s6d7aa0_ltl101at01_mode,
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.mode_flags = MIPI_DSI_MODE_NO_EOT_PACKET,
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.bus_flags = 0,
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.has_backlight = true,
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.use_passwd3 = true,
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};
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static int s6d7aa0_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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struct drm_display_mode *mode;
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struct s6d7aa0 *ctx;
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ctx = container_of(panel, struct s6d7aa0, panel);
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if (!ctx)
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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");
|