From: Maxime Ripard maxime@cerno.tech
[ Upstream commit b7551457c5d0b3505b0be247d47919c1ee30506d ]
If we have a state already and disconnect/reconnect the display, the SCDC messages won't be sent again since we didn't go through a disable / enable cycle.
In order to fix this, let's call the vc4_hdmi_enable_scrambling function in the detect callback if there is a mode and it needs the scrambler to be enabled.
Fixes: c85695a2016e ("drm/vc4: hdmi: Enable the scrambler") Signed-off-by: Maxime Ripard maxime@cerno.tech Reviewed-by: Dave Stevenson dave.stevenson@raspberrypi.com Link: https://lore.kernel.org/r/20211025152903.1088803-10-maxime@cerno.tech Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/vc4/vc4_hdmi.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 49944644a9b36..e880bdd8dcfd2 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -162,6 +162,8 @@ static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) {} #endif
+static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder); + static enum drm_connector_status vc4_hdmi_connector_detect(struct drm_connector *connector, bool force) { @@ -190,6 +192,7 @@ vc4_hdmi_connector_detect(struct drm_connector *connector, bool force) } }
+ vc4_hdmi_enable_scrambling(&vc4_hdmi->encoder.base.base); pm_runtime_put(&vc4_hdmi->pdev->dev); return connector_status_connected; }