Initial driver for S6D7AA0-controlled panels, currently only for the
LSL080AL02 panel used in the Samsung Galaxy Tab 3 8.0 family of tablets.
It should be possible to extend this driver to work with other panels
using this IC.
Signed-off-by: Artur Weber
---
Changed in v2:
- Removed unused panel_name property from desc struct
---
drivers/gpu/drm/panel/Kconfig | 7 +
drivers/gpu/drm/panel/Makefile| 1 +
drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c | 395 ++
3 files changed, 403 insertions(+)
create mode 100644 drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index 871c..2ce9d1a45625 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -532,6 +532,13 @@ config DRM_PANEL_SAMSUNG_S6D27A1
This panel can be found in Samsung Galaxy Ace 2
GT-I8160 mobile phone.
+config DRM_PANEL_SAMSUNG_S6D7AA0
+ tristate "Samsung S6D7AA0 MIPI-DSI video mode panel controller"
+ depends on OF
+ depends on BACKLIGHT_CLASS_DEVICE
+ select DRM_MIPI_DSI
+ select VIDEOMODE_HELPERS
+
config DRM_PANEL_SAMSUNG_S6E3HA2
tristate "Samsung S6E3HA2 DSI video mode panel"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index c05aa9e23907..193f3067865d 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_DB7430) +=
panel-samsung-db7430.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D16D0) += panel-samsung-s6d16d0.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D27A1) += panel-samsung-s6d27a1.o
+obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6D7AA0) += panel-samsung-s6d7aa0.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o
obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0) += panel-samsung-s6e63m0.o
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 ..408e4082de74
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c
@@ -0,0 +1,395 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Samsung S6D7AA0 MIPI-DSI TFT LCD controller drm_panel driver.
+ *
+ * Copyright (C) 2022 Artur Weber
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#include
+#include
+#include
+#include
+
+/* Manufacturer command set */
+#define CMD_BL_CTL 0xc3
+#define CMD_OTP_RELOAD 0xd0
+#define CMD_PASSWD10xf0
+#define CMD_PASSWD20xf1
+#define CMD_PASSWD30xfc
+
+struct s6d7aa0 {
+ struct drm_panel panel;
+ struct mipi_dsi_device *dsi;
+ struct gpio_desc *reset_gpio;
+ struct regulator *enable_supply;
+ const struct s6d7aa0_panel_desc *desc;
+ bool prepared;
+};
+
+struct s6d7aa0_panel_desc {
+ int (*init_func)(struct s6d7aa0 *ctx);
+ const struct drm_display_mode drm_mode;
+ unsigned long mode_flags;
+ u32 bus_flags;
+ bool use_passwd3;
+};
+
+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, 0);
+ msleep(50);
+ 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, CMD_PASSWD1, 0xa5, 0xa5);
+ mipi_dsi_dcs_write_seq(dsi, CMD_PASSWD2, 0xa5, 0xa5);
+ if (ctx->desc->use_passwd3)
+ mipi_dsi_dcs_write_seq(dsi, CMD_PASSWD3, 0x5a, 0x5a);
+ } else {
+ mipi_dsi_dcs_write_seq(dsi, CMD_PASSWD1, 0x5a, 0x5a);
+ mipi_dsi_dcs_write_seq(dsi, CMD_PASSWD2, 0x5a, 0x5a);
+ if (ctx->desc->use_passwd3)
+ mipi_dsi_dcs_write_seq(dsi, CMD_PASSWD3, 0xa5, 0xa5);
+ }
+
+ return 0;
+}
+
+static int s6d7aa0_bl_ctl_on(struct s6d7aa0 *ctx, bool enable)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+
+ if (enable)
+ mipi_dsi_dcs_write_seq(dsi, CMD_BL_CTL, 0x40, 0x00, 0x28);
+ else
+ mipi_dsi_dcs_write_seq(dsi, CMD_BL_CTL, 0x40, 0x00, 0x20);
+
+ return 0;
+}
+
+static int s6d7aa0_on(struct s6d7aa0 *ctx)
+{
+ struct mipi_dsi_device *dsi = ctx->dsi;
+ struct device *dev = &dsi->dev;
+ int ret;
+
+ dsi->mode_flags |= MIPI_DSI_MODE_LPM;
+
+ s6d7aa0_reset(ctx);
+
+ ret = ctx->desc->init_func(ctx);
+ if (ret < 0) {
+
