[PATCH v2 2/3] drm/panel: sitronix-st7789v: add panel orientation support

From: Michael Riesch
Date: Thu Aug 03 2023 - 16:14:17 EST


Determine the orientation of the display based on the device tree and
propagate it.

Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Signed-off-by: Michael Riesch <michael.riesch@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/panel/panel-sitronix-st7789v.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
index c7cbfe6ca82c..6575f07d49e3 100644
--- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
@@ -116,6 +116,7 @@ struct st7789v {
struct spi_device *spi;
struct gpio_desc *reset;
struct regulator *power;
+ enum drm_panel_orientation orientation;
};

enum st7789v_prefix {
@@ -170,6 +171,7 @@ static const struct drm_display_mode default_mode = {
static int st7789v_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
+ struct st7789v *ctx = panel_to_st7789v(panel);
struct drm_display_mode *mode;

mode = drm_mode_duplicate(connector->dev, &default_mode);
@@ -188,9 +190,22 @@ static int st7789v_get_modes(struct drm_panel *panel,
connector->display_info.width_mm = 61;
connector->display_info.height_mm = 103;

+ /*
+ * TODO: Remove once all drm drivers call
+ * drm_connector_set_orientation_from_panel()
+ */
+ drm_connector_set_panel_orientation(connector, ctx->orientation);
+
return 1;
}

+static enum drm_panel_orientation st7789v_get_orientation(struct drm_panel *p)
+{
+ struct st7789v *ctx = panel_to_st7789v(p);
+
+ return ctx->orientation;
+}
+
static int st7789v_prepare(struct drm_panel *panel)
{
struct st7789v *ctx = panel_to_st7789v(panel);
@@ -349,6 +364,7 @@ static const struct drm_panel_funcs st7789v_drm_funcs = {
.disable = st7789v_disable,
.enable = st7789v_enable,
.get_modes = st7789v_get_modes,
+ .get_orientation = st7789v_get_orientation,
.prepare = st7789v_prepare,
.unprepare = st7789v_unprepare,
};
@@ -382,6 +398,8 @@ static int st7789v_probe(struct spi_device *spi)
if (ret)
return ret;

+ of_drm_get_panel_orientation(spi->dev.of_node, &ctx->orientation);
+
drm_panel_add(&ctx->panel);

return 0;

--
2.37.2