From: Maxime Ripard <maxime@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
Reviewed-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211025152903.1088803-10-maxime@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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;
}
--
2.34.1
