Add support for describing the media bus format in the
panel configuration and expose that to userspace. Since
both supported formats (RGB565 and RGB666) are using 6
bits per color also hardcode that information.
Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
---
.../gpu/drm/panel/panel-sitronix-st7789v.c | 26 ++++++++++++++++---
1 file changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
index 0e1839e6da73..6d155c6262f3 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
@@ -10,6 +10,7 @@
#include <linux/spi/spi.h>
#include <video/mipi_display.h>
+#include <linux/media-bus-format.h>
#include <drm/drm_device.h>
#include <drm/drm_modes.h>
@@ -110,6 +111,7 @@
struct st7789_panel_info {
const struct drm_display_mode *mode;
+ u32 bus_format;
};
struct st7789v {
@@ -169,6 +171,7 @@ static const struct drm_display_mode default_mode = {
struct st7789_panel_info default_panel = {
.mode = &default_mode,
+ .bus_format = MEDIA_BUS_FMT_RGB666_1X18,
};
static int st7789v_get_modes(struct drm_panel *panel,
@@ -190,8 +193,11 @@ static int st7789v_get_modes(struct drm_panel *panel,
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
+ connector->display_info.bpc = 6;
connector->display_info.width_mm = ctx->info->mode->width_mm;
connector->display_info.height_mm = ctx->info->mode->height_mm;
+ drm_display_info_set_bus_formats(&connector->display_info,
+ &ctx->info->bus_format, 1);
return 1;
}
@@ -199,8 +205,24 @@ static int st7789v_get_modes(struct drm_panel *panel,
static int st7789v_prepare(struct drm_panel *panel)
{
struct st7789v *ctx = panel_to_st7789v(panel);
+ u8 pixel_fmt;
int ret;
+ switch (ctx->info->bus_format) {
+ case MEDIA_BUS_FMT_RGB666_1X18:
+ pixel_fmt = MIPI_DCS_PIXEL_FMT_18BIT;
+ break;
+ case MEDIA_BUS_FMT_RGB565_1X16:
+ pixel_fmt = MIPI_DCS_PIXEL_FMT_16BIT;
+ break;
+ default:
+ dev_err(panel->dev, "unsupported bus format: %d\n",
+ ctx->info->bus_format);
+ return -EINVAL;
+ }
+
+ pixel_fmt = (pixel_fmt << 4) | pixel_fmt;
+
ret = regulator_enable(ctx->power);
if (ret)
return ret;
@@ -221,9 +243,7 @@ static int st7789v_prepare(struct drm_panel *panel)
ST7789V_TEST(ret, st7789v_write_command(ctx,
MIPI_DCS_SET_PIXEL_FORMAT));
- ST7789V_TEST(ret, st7789v_write_data(ctx,
- (MIPI_DCS_PIXEL_FMT_18BIT << 4) |
- (MIPI_DCS_PIXEL_FMT_18BIT)));
+ ST7789V_TEST(ret, st7789v_write_data(ctx, pixel_fmt));
ST7789V_TEST(ret, st7789v_write_command(ctx, ST7789V_PORCTRL_CMD));
ST7789V_TEST(ret, st7789v_write_data(ctx, 0xc));
--
2.39.2
