On Tue, Jun 18, 2024 at 04:59:45PM GMT, Dzmitry Sankouski wrote:
> 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.
>
> Signed-off-by: Dzmitry Sankouski
> ---
> MAINTAINERS | 1 +
> drivers/gpu/drm/panel/Kconfig | 7 +
> drivers/gpu/drm/panel/Makefile| 1 +
> drivers/gpu/drm/panel/panel-samsung-s6e3ha8.c | 426
> ++
> 4 files changed, 435 insertions(+)
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 92a5d0a56353..fae3b8ea9ce4 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -7154,6 +7154,7 @@ DRM DRIVER FOR SAMSUNG S6E3HA8 PANELS
> M: Dzmitry Sankouski
> 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
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 2ae0eb0638f3..903fc8c155c0 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -651,6 +651,13 @@ 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 f0203f6e02f4..71774cc5820a 100644
> --- a/drivers/gpu/drm/panel/Makefile
> +++ b/drivers/gpu/drm/panel/Makefile
> @@ -66,6 +66,7 @@ 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 ..49d629643171
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-samsung-s6e3ha8.c
> @@ -0,0 +1,426 @@
> +// 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
> + */
> +
> +#include
> +#include
> +#include
> +#include
> +#include
> +
> +#include
> +#include
> +#include
> +#include
> +#include
> +
> +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[3];
> +};
> +
> +static inline
> +struct s6e3ha8 *to_s6e3ha8_amb577px01_wqhd(struct drm_panel *panel)
> +{
> + return container_of(panel, struct s6e3ha8, panel);
> +}
> +
> +#define s6e3ha8_call_write_func(ret, func) do { \
> + ret = (func); \
> + if (ret < 0)\
> + return ret; \
> +} while (0)
Please rework the driver to use mipi_dsi_*_multi() family of functions.
Using the mipi_dsi_multi_context should make this wrapper obsolete too.
> +
> +static int s6e3ha8_test_key_on_lvl1(struct mipi_dsi_device *dsi)
> +{
> + static const u8 d[] = { 0x9f, 0xa5, 0xa5 };
> +
> + return mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d));
> + return 0;
Ugh. So which return is it?
> +}
> +
[...]
> +static int s6e3ha8_power_on(struct s6e3ha8 *ctx)
> +{
> + int ret;
> +
> + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
Inline this function, it's just regulator_bulk_enable() in the end.
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int s6e3ha8_power_off(struct s6e3ha8 *ctx)
> +{
> + return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
> +}
> +
> +static void s6e3ha8_amb577px01_wqhd_reset(struct s6e3ha8 *ctx)
> +{
> + gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> + usleep_range(5000, 6000);
> + gpiod_set_value_cansleep(ctx->reset_gpio, 0);
> + usleep_range(5000, 6000);
> + gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> + usleep_range(5000, 6000);
> +}
> +
> +stati
