| Message ID | 20240715-drm-bridge-connector-fix-hdmi-reset-v4-3-61e6417cfd99@linaro.org (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Kieran Bingham |
| Headers | show |
| Series | drm: fix two issues related to HDMI Connector implementation | expand |
On Mon, Jul 15, 2024 at 09:33:03AM GMT, Dmitry Baryshkov wrote: > With the introduction of the HDMI Connector framework the driver might > end up creating the max_bpc property with min = max = 8. IGT insists > that such properties carry the 'immutable' flag. Automatically set the > flag if the driver asks for the max_bpc property with min == max. > > Fixes: aadb3e16b8f3 ("drm/connector: hdmi: Add output BPC to the connector state") > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Assuming that someone on the uapi sides agrees to patch 3: Acked-by: Maxime Ripard <mripard@kernel.org> Maxime
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index ab6ab7ff7ea8..33847fd63628 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -2610,7 +2610,12 @@ int drm_connector_attach_max_bpc_property(struct drm_connector *connector, prop = connector->max_bpc_property; if (!prop) { - prop = drm_property_create_range(dev, 0, "max bpc", min, max); + u32 flags = 0; + + if (min == max) + flags |= DRM_MODE_PROP_IMMUTABLE; + + prop = drm_property_create_range(dev, flags, "max bpc", min, max); if (!prop) return -ENOMEM;
With the introduction of the HDMI Connector framework the driver might end up creating the max_bpc property with min = max = 8. IGT insists that such properties carry the 'immutable' flag. Automatically set the flag if the driver asks for the max_bpc property with min == max. Fixes: aadb3e16b8f3 ("drm/connector: hdmi: Add output BPC to the connector state") Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> --- drivers/gpu/drm/drm_connector.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)