--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2024, Danila Tikhonov <danila@jiaxyga.com>
+ */
+
+#include <linux/backlight.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.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>
+#include <drm/drm_probe_helper.h>
+
+/* Manufacturer Command Set */
+#define MCS_ACCESS_PROT_OFF 0xb0
+#define MCS_UNKNOWN_B7 0xb7
+#define MCS_BIAS_CURRENT_CTRL 0xd1
+#define MCS_PASSWD1 0xf0
+#define MCS_PASSWD2 0xfc
+#define MCS_UNKNOWN_FF 0xff
+
+struct ams639rq08 {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data *supplies;
+};
+
+static const struct regulator_bulk_data ams639rq08_supplies[] = {
+ { .supply = "vdd3p3" },
+ { .supply = "vddio" },
+ { .supply = "vsn" },
+ { .supply = "vsp" },
+};
+
+static inline struct ams639rq08 *to_ams639rq08(struct drm_panel *panel)
+{
+ return container_of(panel, struct ams639rq08, panel);
+}
+
+static void ams639rq08_reset(struct ams639rq08 *ctx)
+{
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ usleep_range(1000, 2000);
+ gpiod_set_value_cansleep(ctx->reset_gpio, 0);
+ usleep_range(10000, 11000);
+}
+
+static int ams639rq08_on(struct ams639rq08 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+
+ /* Delay 2ms for VCI1 power */
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0x5a, 0x5a);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD2, 0x5a, 0x5a);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x0c);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_UNKNOWN_FF, 0x10);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x2f);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_BIAS_CURRENT_CTRL, 0x01);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0xa5, 0xa5);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD2, 0xa5, 0xa5);
+
+ /* Sleep Out */
+ mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+ usleep_range(10000, 11000);
+
+ /* TE OUT (Vsync On) */
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0x5a, 0x5a);
+
+ mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+
+ /* DBV Smooth Transition */
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_UNKNOWN_B7, 0x01, 0x4b);
+
+ /* Edge Dimming Speed Setting */
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x06);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_UNKNOWN_B7, 0x10);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0xa5, 0xa5);
+
+ /* Page Address Set */
+ mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 0x0923);
+
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0x5a, 0x5a);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD2, 0x5a, 0x5a);
+
+ /* Set DDIC internal HFP */
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x23);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_BIAS_CURRENT_CTRL, 0x11);
+
+ /* OFC Setting 84.1 Mhz */
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe9, 0x11, 0x55,
+ 0xa6, 0x75, 0xa3,
+ 0xb9, 0xa1, 0x4a,
+ 0x00, 0x1a, 0xb8);
+
+ /* Err_FG Setting */
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe1,
+ 0x00, 0x00, 0x02,
+ 0x02, 0x42, 0x02);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe2,
+ 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_ACCESS_PROT_OFF, 0x0c);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xe1, 0x19);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD1, 0xa5, 0xa5);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MCS_PASSWD2, 0xa5, 0xa5);
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x20);
+
+ /* Brightness Control */
+ mipi_dsi_dcs_set_display_brightness_multi(&dsi_ctx, 0x0000);
+
+ /* Display On */
+ mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
+ mipi_dsi_msleep(&dsi_ctx, 67);
+
+ mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+
+ return dsi_ctx.accum_err;
+}
+
+static void ams639rq08_off(struct ams639rq08 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
+
+ mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+ mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+ mipi_dsi_msleep(&dsi_ctx, 120);
+}
+
+static int ams639rq08_prepare(struct drm_panel *panel)
+{
+ struct ams639rq08 *ctx = to_ams639rq08(panel);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(ams639rq08_supplies),
+ ctx->supplies);
+ if (ret < 0)
+ return ret;
+
+ ams639rq08_reset(ctx);
+
+ ret = ams639rq08_on(ctx);
+ if (ret < 0) {
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(ams639rq08_supplies),
+ ctx->supplies);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ams639rq08_unprepare(struct drm_panel *panel)
+{
+ struct ams639rq08 *ctx = to_ams639rq08(panel);
+
+ ams639rq08_off(ctx);
+
+ gpiod_set_value_cansleep(ctx->reset_gpio, 1);
+ regulator_bulk_disable(ARRAY_SIZE(ams639rq08_supplies),
+ ctx->supplies);
+
+ return 0;
+}
+
+static const struct drm_display_mode ams639rq08_mode = {
+ .clock = (1080 + 64 + 20 + 64) * (2340 + 64 + 20 + 64) * 60 / 1000,
+ .hdisplay = 1080,
+ .hsync_start = 1080 + 64,
+ .hsync_end = 1080 + 64 + 20,
+ .htotal = 1080 + 64 + 20 + 64,
+ .vdisplay = 2340,
+ .vsync_start = 2340 + 64,
+ .vsync_end = 2340 + 64 + 20,
+ .vtotal = 2340 + 64 + 20 + 64,
+ .width_mm = 68,
+ .height_mm = 147,
+ .type = DRM_MODE_TYPE_DRIVER,
+};
+
+static int ams639rq08_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ return drm_connector_helper_get_modes_fixed(connector, &ams639rq08_mode);
+}
+
+static const struct drm_panel_funcs ams639rq08_panel_funcs = {
+ .prepare = ams639rq08_prepare,
+ .unprepare = ams639rq08_unprepare,
+ .get_modes = ams639rq08_get_modes,
+};
+
+static int ams639rq08_bl_update_status(struct backlight_device *bl)
+{
+ struct mipi_dsi_device *dsi = bl_get_data(bl);
+ u16 brightness = backlight_get_brightness(bl);
+ int ret;
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness);
+ if (ret < 0)
+ return ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ return 0;
+}
+
+static int ams639rq08_bl_get_brightness(struct backlight_device *bl)
+{
+ struct mipi_dsi_device *dsi = bl_get_data(bl);
+ u16 brightness;
+ int ret;
+
+ dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
+
+ ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness);
+ if (ret < 0)
+ return ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ return brightness;
+}
+
+static const struct backlight_ops ams639rq08_bl_ops = {
+ .update_status = ams639rq08_bl_update_status,
+ .get_brightness = ams639rq08_bl_get_brightness,
+};
+
+static struct backlight_device *
+ams639rq08_create_backlight(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ const struct backlight_properties props = {
+ .type = BACKLIGHT_RAW,
+ .brightness = 1023,
+ .max_brightness = 2047,
+ };
+
+ return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
+ &ams639rq08_bl_ops, &props);
+}
+
+static int ams639rq08_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct ams639rq08 *ctx;
+ int ret;
+
+ ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ret = devm_regulator_bulk_get_const(&dsi->dev,
+ ARRAY_SIZE(ams639rq08_supplies),
+ ams639rq08_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_BURST |
+ MIPI_DSI_CLOCK_NON_CONTINUOUS | MIPI_DSI_MODE_LPM;
+
+ drm_panel_init(&ctx->panel, dev, &ams639rq08_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ ctx->panel.prepare_prev_first = true;
+
+ ctx->panel.backlight = ams639rq08_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 = devm_mipi_dsi_attach(dev, dsi);
+ if (ret < 0) {
+ drm_panel_remove(&ctx->panel);
+ return dev_err_probe(dev, ret, "Failed to attach to DSI host\n");
+ }
+
+ return 0;
+}
+
+static void ams639rq08_remove(struct mipi_dsi_device *dsi)
+{
+ struct ams639rq08 *ctx = mipi_dsi_get_drvdata(dsi);
+
+ drm_panel_remove(&ctx->panel);
+}
+
+static const struct of_device_id ams639rq08_of_match[] = {
+ { .compatible = "samsung,ams639rq08" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, ams639rq08_of_match);
+
+static struct mipi_dsi_driver ams639rq08_driver = {
+ .probe = ams639rq08_probe,
+ .remove = ams639rq08_remove,
+ .driver = {
+ .name = "panel-samsung-ams639rq08",
+ .of_match_table = ams639rq08_of_match,
+ },
+};
+module_mipi_dsi_driver(ams639rq08_driver);
+
+MODULE_AUTHOR("Danila Tikhonov <danila@jiaxyga.com>");
+MODULE_DESCRIPTION("DRM driver for SAMSUNG AMS639RQ08 cmd mode dsi panel");
+MODULE_LICENSE("GPL");
projects / thirdparty / linux.git / commitdiff
