drm: panel: Add orientation support for st7701

Note that this patch is 'heavily inspired' by orientation support in driver
for Elida KD35T133 panel

Signed-off-by: Maya Matuszczyk <maccraft123mc@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20230213153816.213526-4-maccraft123mc@gmail.com

diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7701.c b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
index 6fcd429..7eae83a 100644 (file)
--- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c
+++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
@@ -135,6 +135,7 @@ struct st7701 {
        struct regulator_bulk_data supplies[2];
        struct gpio_desc *reset;
        unsigned int sleep_delay;
+       enum drm_panel_orientation orientation;
 };
 
 static inline struct st7701 *panel_to_st7701(struct drm_panel *panel)
@@ -514,15 +515,29 @@ static int st7701_get_modes(struct drm_panel *panel,
        connector->display_info.width_mm = desc_mode->width_mm;
        connector->display_info.height_mm = desc_mode->height_mm;
 
+       /*
+        * TODO: Remove once all drm drivers call
+        * drm_connector_set_orientation_from_panel()
+        */
+       drm_connector_set_panel_orientation(connector, st7701->orientation);
+
        return 1;
 }
 
+static enum drm_panel_orientation st7701_get_orientation(struct drm_panel *panel)
+{
+       struct st7701 *st7701 = panel_to_st7701(panel);
+
+       return st7701->orientation;
+}
+
 static const struct drm_panel_funcs st7701_funcs = {
        .disable        = st7701_disable,
        .unprepare      = st7701_unprepare,
        .prepare        = st7701_prepare,
        .enable         = st7701_enable,
        .get_modes      = st7701_get_modes,
+       .get_orientation = st7701_get_orientation,
 };
 
 static const struct drm_display_mode ts8550b_mode = {
@@ -854,6 +869,10 @@ static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
                return PTR_ERR(st7701->reset);
        }
 
+       ret = of_drm_get_panel_orientation(dsi->dev.of_node, &st7701->orientation);
+       if (ret < 0)
+               return dev_err_probe(&dsi->dev, ret, "Failed to get orientation\n");
+
        drm_panel_init(&st7701->panel, &dsi->dev, &st7701_funcs,
                       DRM_MODE_CONNECTOR_DSI);