[PATCH v7 3/3] drm/panel: Add support for S6E3HA8 panel driver

From: Dzmitry Sankouski
Date: Wed Oct 09 2024 - 11:16:27 EST

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Add support for MIPI-DSI based S6E3HA8 AMOLED panel
driver. This panel has 1440x2960 resolution, 5.8-inch physical
size, and can be found in starqltechn device.
Brightness regulation is not yet supported.

Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Signed-off-by: Dzmitry Sankouski <dsankouski@xxxxxxxxx>
---
Changes for v6:
- return ctx.accum_err instead of 0 where possible
- s6e3ha8_amb577px01_wqhd_on: arrange code blocks by
key unlock / lock actions
- more *_multi functions
- switch to devm_regulator_bulk_get_const

Changes for v5:
- return ctx.accum_err instead of 0 where possible
- switch mipi_dsi_picture_parameter_set to _multi
- replace msleep with mipi_dsi_msleep

Changes in v4:
- inline power related functions
- rework driver using new mipi_dsi_dcs_write_seq_multi macro
- use drm_connector_helper_get_modes_fixed for modes
- remove excessive compression setting
---
MAINTAINERS | 1 +
drivers/gpu/drm/panel/Kconfig | 7 +++
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-samsung-s6e3ha8.c | 342 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 351 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index ccc3cf5114c6..0f3f767afa4c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7393,6 +7393,7 @@ DRM DRIVER FOR SAMSUNG S6E3HA8 PANELS
M: Dzmitry Sankouski <dsankouski@xxxxxxxxx>
S: Maintained
F: Documentation/devicetree/bindings/display/panel/samsung,s6e3ha8.yaml
+F: drivers/gpu/drm/panel/panel-samsung-s6e3ha8.c

DRM DRIVER FOR SITRONIX ST7586 PANELS
M: David Lechner <david@xxxxxxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 1077fd2307d4..7d3c9cbfe835 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -689,6 +689,13 @@ config DRM_PANEL_SAMSUNG_S6E3HA2
depends on BACKLIGHT_CLASS_DEVICE
select VIDEOMODE_HELPERS

+config DRM_PANEL_SAMSUNG_S6E3HA8
+ tristate "Samsung S6E3HA8 DSI video mode panel"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ select VIDEOMODE_HELPERS
+
config DRM_PANEL_SAMSUNG_S6E63J0X03
tristate "Samsung S6E63J0X03 DSI command mode panel"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 987a08702410..8ee28f5a2213 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D27A1) += panel-samsung-s6d27a1.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D7AA0) += panel-samsung-s6d7aa0.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3FA7) += panel-samsung-s6e3fa7.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA8) += panel-samsung-s6e3ha8.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0) += panel-samsung-s6e63m0.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_SPI) += panel-samsung-s6e63m0-spi.o
diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e3ha8.c b/drivers/gpu/drm/panel/panel-samsung-s6e3ha8.c
new file mode 100644
index 000000000000..76b5a6ea610d
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e3ha8.c
@@ -0,0 +1,342 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
+// Copyright (c) 2013, The Linux Foundation. All rights reserved.
+// Copyright (c) 2024 Dzmitry Sankouski <dsankouski@xxxxxxxxx>
+
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regulator/consumer.h>
+
+#include <drm/display/drm_dsc.h>
+#include <drm/display/drm_dsc_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_panel.h>
+
+struct s6e3ha8 {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct drm_dsc_config dsc;
+ struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data *supplies;
+};
+
+const struct regulator_bulk_data s6e3ha8_supplies[] = {
+ { .supply = "vdd3" },
+ { .supply = "vci" },
+ { .supply = "vddr" },
+};
+
+static inline
+struct s6e3ha8 *to_s6e3ha8_amb577px01_wqhd(struct drm_panel *panel)
+{
+ return container_of(panel, struct s6e3ha8, panel);
+}
+
+#define s6e3ha8_test_key_on_lvl2(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0x5a, 0x5a)
+#define s6e3ha8_test_key_off_lvl2(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xf0, 0xa5, 0xa5)
+#define s6e3ha8_test_key_on_lvl3(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xfc, 0x5a, 0x5a)
+#define s6e3ha8_test_key_off_lvl3(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xfc, 0xa5, 0xa5)
+#define s6e3ha8_test_key_on_lvl1(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0x9f, 0xa5, 0xa5)
+#define s6e3ha8_test_key_off_lvl1(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0x9f, 0x5a, 0x5a)
+#define s6e3ha8_afc_off(ctx) \
+ mipi_dsi_dcs_write_seq_multi(ctx, 0xe2, 0x00, 0x00)
+
+static void s6e3ha8_amb577px01_wqhd_reset(struct s6e3ha8 *priv)
+{
+ gpiod_set_value_cansleep(priv->reset_gpio, 1);
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(priv->reset_gpio, 0);
+ usleep_range(5000, 6000);
+ gpiod_set_value_cansleep(priv->reset_gpio, 1);
+ usleep_range(5000, 6000);
+}
+
+static int s6e3ha8_amb577px01_wqhd_on(struct s6e3ha8 *priv)
+{
+ struct mipi_dsi_device *dsi = priv->dsi;
+ struct mipi_dsi_multi_context ctx = { .dsi = dsi };
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ s6e3ha8_test_key_on_lvl1(&ctx);
+
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ mipi_dsi_compression_mode_multi(&ctx, true);
+ s6e3ha8_test_key_off_lvl2(&ctx);
+
+ mipi_dsi_dcs_exit_sleep_mode_multi(&ctx);
+ usleep_range(5000, 6000);
+
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xf2, 0x13);
+ s6e3ha8_test_key_off_lvl2(&ctx);
+ usleep_range(10000, 11000);
+
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xf2, 0x13);
+ s6e3ha8_test_key_off_lvl2(&ctx);
+
+ /* OMOK setting 1 (Initial setting) - Scaler Latch Setting Guide */
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb0, 0x07);
+ /* latch setting 1 : Scaler on/off & address setting & PPS setting -> Image update latch */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xf2, 0x3c, 0x10);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb0, 0x0b);
+ /* latch setting 2 : Ratio change mode -> Image update latch */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xf2, 0x30);
+ /* OMOK setting 2 - Seamless setting guide : WQHD */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x2a, 0x00, 0x00, 0x05, 0x9f); /* CASET */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x2b, 0x00, 0x00, 0x0b, 0x8f); /* PASET */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xba, 0x01); /* scaler setup : scaler off */
+ s6e3ha8_test_key_off_lvl2(&ctx);
+
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0x35, 0x00); /* TE Vsync ON */
+
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xed, 0x4c); /* ERR_FG */
+ s6e3ha8_test_key_off_lvl2(&ctx);
+
+ s6e3ha8_test_key_on_lvl3(&ctx);
+ /* FFC Setting 897.6Mbps */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xc5, 0x0d, 0x10, 0xb4, 0x3e, 0x01);
+ s6e3ha8_test_key_off_lvl3(&ctx);
+
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb9,
+ 0x00, 0xb0, 0x81, 0x09, 0x00, 0x00, 0x00,
+ 0x11, 0x03); /* TSP HSYNC Setting */
+ s6e3ha8_test_key_off_lvl2(&ctx);
+
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb0, 0x03);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xf6, 0x43);
+ s6e3ha8_test_key_off_lvl2(&ctx);
+
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ /* Brightness condition set */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xca,
+ 0x07, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80,
+ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
+ 0x80, 0x80, 0x80, 0x00, 0x00, 0x00);
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb1, 0x00, 0x0c); /* AID Set : 0% */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xb5,
+ 0x19, 0xdc, 0x16, 0x01, 0x34, 0x67, 0x9a,
+ 0xcd, 0x01, 0x22, 0x33, 0x44, 0x00, 0x00,
+ 0x05, 0x55, 0xcc, 0x0c, 0x01, 0x11, 0x11,
+ 0x10); /* MPS/ELVSS Setting */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xf4, 0xeb, 0x28); /* VINT */
+ mipi_dsi_dcs_write_seq_multi(&ctx, 0xf7, 0x03); /* Gamma, LTPS(AID) update */
+ s6e3ha8_test_key_off_lvl2(&ctx);
+
+ s6e3ha8_test_key_off_lvl1(&ctx);
+
+ return ctx.accum_err;
+}
+
+static int s6e3ha8_enable(struct drm_panel *panel)
+{
+ struct s6e3ha8 *priv = to_s6e3ha8_amb577px01_wqhd(panel);
+ struct mipi_dsi_device *dsi = priv->dsi;
+ struct mipi_dsi_multi_context ctx = { .dsi = dsi };
+
+ s6e3ha8_test_key_on_lvl1(&ctx);
+ mipi_dsi_dcs_set_display_on_multi(&ctx);
+ s6e3ha8_test_key_off_lvl1(&ctx);
+
+ return ctx.accum_err;
+}
+
+static int s6e3ha8_disable(struct drm_panel *panel)
+{
+ struct s6e3ha8 *priv = to_s6e3ha8_amb577px01_wqhd(panel);
+ struct mipi_dsi_device *dsi = priv->dsi;
+ struct mipi_dsi_multi_context ctx = { .dsi = dsi };
+
+ s6e3ha8_test_key_on_lvl1(&ctx);
+ mipi_dsi_dcs_set_display_off_multi(&ctx);
+ s6e3ha8_test_key_off_lvl1(&ctx);
+ mipi_dsi_msleep(&ctx, 20);
+
+ s6e3ha8_test_key_on_lvl2(&ctx);
+ s6e3ha8_afc_off(&ctx);
+ s6e3ha8_test_key_off_lvl2(&ctx);
+
+ mipi_dsi_msleep(&ctx, 160);
+
+ return ctx.accum_err;
+}
+
+static int s6e3ha8_amb577px01_wqhd_prepare(struct drm_panel *panel)
+{
+ struct s6e3ha8 *priv = to_s6e3ha8_amb577px01_wqhd(panel);
+ struct mipi_dsi_device *dsi = priv->dsi;
+ struct mipi_dsi_multi_context ctx = { .dsi = dsi };
+ struct drm_dsc_picture_parameter_set pps;
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(s6e3ha8_supplies), priv->supplies);
+ if (ret < 0)
+ return ret;
+ mipi_dsi_msleep(&ctx, 120);
+ s6e3ha8_amb577px01_wqhd_reset(priv);
+
+ ret = s6e3ha8_amb577px01_wqhd_on(priv);
+ if (ret < 0) {
+ gpiod_set_value_cansleep(priv->reset_gpio, 1);
+ goto err;
+ }
+
+ drm_dsc_pps_payload_pack(&pps, &priv->dsc);
+
+ s6e3ha8_test_key_on_lvl1(&ctx);
+ mipi_dsi_picture_parameter_set_multi(&ctx, &pps);
+ s6e3ha8_test_key_off_lvl1(&ctx);
+
+ mipi_dsi_msleep(&ctx, 28);
+
+ return ctx.accum_err;
+err:
+ regulator_bulk_disable(ARRAY_SIZE(s6e3ha8_supplies), priv->supplies);
+ return ret;
+}
+
+static int s6e3ha8_amb577px01_wqhd_unprepare(struct drm_panel *panel)
+{
+ struct s6e3ha8 *priv = to_s6e3ha8_amb577px01_wqhd(panel);
+
+ return regulator_bulk_disable(ARRAY_SIZE(s6e3ha8_supplies), priv->supplies);
+}
+
+static const struct drm_display_mode s6e3ha8_amb577px01_wqhd_mode = {
+ .clock = (1440 + 116 + 44 + 120) * (2960 + 120 + 80 + 124) * 60 / 1000,
+ .hdisplay = 1440,
+ .hsync_start = 1440 + 116,
+ .hsync_end = 1440 + 116 + 44,
+ .htotal = 1440 + 116 + 44 + 120,
+ .vdisplay = 2960,
+ .vsync_start = 2960 + 120,
+ .vsync_end = 2960 + 120 + 80,
+ .vtotal = 2960 + 120 + 80 + 124,
+ .width_mm = 64,
+ .height_mm = 132,
+};
+
+static int s6e3ha8_amb577px01_wqhd_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ return drm_connector_helper_get_modes_fixed(connector, &s6e3ha8_amb577px01_wqhd_mode);
+}
+
+static const struct drm_panel_funcs s6e3ha8_amb577px01_wqhd_panel_funcs = {
+ .prepare = s6e3ha8_amb577px01_wqhd_prepare,
+ .unprepare = s6e3ha8_amb577px01_wqhd_unprepare,
+ .get_modes = s6e3ha8_amb577px01_wqhd_get_modes,
+ .enable = s6e3ha8_enable,
+ .disable = s6e3ha8_disable,
+};
+
+static int s6e3ha8_amb577px01_wqhd_probe(struct mipi_dsi_device *dsi)
+{
+ struct device *dev = &dsi->dev;
+ struct s6e3ha8 *priv;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ ret = devm_regulator_bulk_get_const(dev, ARRAY_SIZE(s6e3ha8_supplies),
+ s6e3ha8_supplies,
+ &priv->supplies);
+ if (ret < 0) {
+ dev_err(dev, "failed to get regulators: %d\n", ret);
+ return ret;
+ }
+
+ priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(priv->reset_gpio))
+ return dev_err_probe(dev, PTR_ERR(priv->reset_gpio),
+ "Failed to get reset-gpios\n");
+
+ priv->dsi = dsi;
+ mipi_dsi_set_drvdata(dsi, priv);
+
+ dsi->lanes = 4;
+ dsi->format = MIPI_DSI_FMT_RGB888;
+ dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
+ MIPI_DSI_MODE_VIDEO_NO_HFP | MIPI_DSI_MODE_VIDEO_NO_HBP |
+ MIPI_DSI_MODE_VIDEO_NO_HSA | MIPI_DSI_MODE_NO_EOT_PACKET;
+
+ drm_panel_init(&priv->panel, dev, &s6e3ha8_amb577px01_wqhd_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ priv->panel.prepare_prev_first = true;
+
+ drm_panel_add(&priv->panel);
+
+ /* This panel only supports DSC; unconditionally enable it */
+ dsi->dsc = &priv->dsc;
+
+ priv->dsc.dsc_version_major = 1;
+ priv->dsc.dsc_version_minor = 1;
+
+ priv->dsc.slice_height = 40;
+ priv->dsc.slice_width = 720;
+ WARN_ON(1440 % priv->dsc.slice_width);
+ priv->dsc.slice_count = 1440 / priv->dsc.slice_width;
+ priv->dsc.bits_per_component = 8;
+ priv->dsc.bits_per_pixel = 8 << 4; /* 4 fractional bits */
+ priv->dsc.block_pred_enable = true;
+
+ ret = mipi_dsi_attach(dsi);
+ if (ret < 0) {
+ dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
+ drm_panel_remove(&priv->panel);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void s6e3ha8_amb577px01_wqhd_remove(struct mipi_dsi_device *dsi)
+{
+ struct s6e3ha8 *priv = 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(&priv->panel);
+}
+
+static const struct of_device_id s6e3ha8_amb577px01_wqhd_of_match[] = {
+ { .compatible = "samsung,s6e3ha8" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, s6e3ha8_amb577px01_wqhd_of_match);
+
+static struct mipi_dsi_driver s6e3ha8_amb577px01_wqhd_driver = {
+ .probe = s6e3ha8_amb577px01_wqhd_probe,
+ .remove = s6e3ha8_amb577px01_wqhd_remove,
+ .driver = {
+ .name = "panel-s6e3ha8",
+ .of_match_table = s6e3ha8_amb577px01_wqhd_of_match,
+ },
+};
+module_mipi_dsi_driver(s6e3ha8_amb577px01_wqhd_driver);
+
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@xxxxxxxxx>");
+MODULE_DESCRIPTION("DRM driver for S6E3HA8 panel");
+MODULE_LICENSE("GPL");

--
2.39.2

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