On HDMI connectors which use drm_bridge_connector and DRM_BRIDGE_OP_HDMI
IGT chokes on the max_bpc property in several kms_properties tests due
to the drm_bridge_connector failing to reset HDMI-related
properties.
Call __drm_atomic_helper_connector_hdmi_reset() if the
drm_bridge_connector has bridge_hdmi.
It is impossible to call this function from HDMI bridges, none of the
bridge callbacks correspond to the drm_connector_funcs::reset().
Fixes: 6b4468b0c6ba ("drm/bridge-connector: implement glue code for HDMI connector")
Reviewed-by: Maxime Ripard <mripard@xxxxxxxxxx>
Acked-by: Maxime Ripard <mripard@xxxxxxxxxx>
Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/display/Kconfig | 1 +
drivers/gpu/drm/display/drm_bridge_connector.c | 13 ++++++++++++-
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/display/Kconfig b/drivers/gpu/drm/display/Kconfig
index 8c174ceb0c4d..3763649ba251 100644
--- a/drivers/gpu/drm/display/Kconfig
+++ b/drivers/gpu/drm/display/Kconfig
@@ -15,6 +15,7 @@ if DRM_DISPLAY_HELPER
config DRM_BRIDGE_CONNECTOR
bool
+ select DRM_DISPLAY_HDMI_STATE_HELPER
help
DRM connector implementation terminating DRM bridge chains.
diff --git a/drivers/gpu/drm/display/drm_bridge_connector.c b/drivers/gpu/drm/display/drm_bridge_connector.c
index a4fbf1eb7ac5..3da5b8bf8259 100644
--- a/drivers/gpu/drm/display/drm_bridge_connector.c
+++ b/drivers/gpu/drm/display/drm_bridge_connector.c
@@ -216,8 +216,19 @@ static void drm_bridge_connector_debugfs_init(struct drm_connector *connector,
}
}
+static void drm_bridge_connector_reset(struct drm_connector *connector)
+{
+ struct drm_bridge_connector *bridge_connector =
+ to_drm_bridge_connector(connector);
+
+ drm_atomic_helper_connector_reset(connector);
+ if (bridge_connector->bridge_hdmi)
+ __drm_atomic_helper_connector_hdmi_reset(connector,
+ connector->state);
+}
+
static const struct drm_connector_funcs drm_bridge_connector_funcs = {
- .reset = drm_atomic_helper_connector_reset,
+ .reset = drm_bridge_connector_reset,
.detect = drm_bridge_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
--
2.39.2
