From: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
The .atomic_get_input_bus_fmts() callback of our top bridge should
return the possible input formats for a given output format. If the
requested output format is not supported, then NULL should be returned,
otherwise the bus format negociation will end with a bus format that the
encoder does not support.
Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
---
drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 28 ++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index a4f5a323f4906..8eb0ad501a7b9 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -833,6 +833,32 @@ static int ingenic_drm_bridge_atomic_check(struct drm_bridge *bridge,
}
}
+static u32 *
+ingenic_drm_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ switch (output_fmt) {
+ case MEDIA_BUS_FMT_RGB888_1X24:
+ case MEDIA_BUS_FMT_RGB666_1X18:
+ case MEDIA_BUS_FMT_RGB565_1X16:
+ case MEDIA_BUS_FMT_RGB888_3X8:
+ case MEDIA_BUS_FMT_RGB888_3X8_DELTA:
+ break;
+ default:
+ *num_input_fmts = 0;
+ return NULL;
+ }
+
+ return drm_atomic_helper_bridge_propagate_bus_fmt(bridge, bridge_state,
+ crtc_state, conn_state,
+ output_fmt,
+ num_input_fmts);
+}
+
static irqreturn_t ingenic_drm_irq_handler(int irq, void *arg)
{
struct ingenic_drm *priv = drm_device_get_priv(arg);
@@ -984,7 +1010,7 @@ static const struct drm_bridge_funcs ingenic_drm_bridge_funcs = {
.atomic_reset = drm_atomic_helper_bridge_reset,
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
- .atomic_get_input_bus_fmts = drm_atomic_helper_bridge_propagate_bus_fmt,
+ .atomic_get_input_bus_fmts = ingenic_drm_bridge_atomic_get_input_bus_fmts,
};
static const struct drm_mode_config_funcs ingenic_drm_mode_config_funcs = {
--
2.33.0
