In the function that validates that the clock isn't too high, we've only
taken our controller limitations into account so far.
However, the sink can have a limit on the maximum TMDS clock it can deal
with too which is exposed through the EDID and the drm_display_info.
Make sure we check it.
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index a1fa37ad350d..4c3a5959c7f5 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1265,12 +1265,18 @@ static enum drm_mode_status
vc4_hdmi_encoder_clock_valid(const struct vc4_hdmi *vc4_hdmi,
unsigned long long clock)
{
+ const struct drm_connector *connector = &vc4_hdmi->connector;
+ const struct drm_display_info *info = &connector->display_info;
+
if (clock > vc4_hdmi->variant->max_pixel_clock)
return MODE_CLOCK_HIGH;
if (vc4_hdmi->disable_4kp60 && clock > HDMI_14_MAX_TMDS_CLK)
return MODE_CLOCK_HIGH;
+ if (info->max_tmds_clock && clock > (info->max_tmds_clock * 1000))
+ return MODE_CLOCK_HIGH;
+
return MODE_OK;
}
--
2.34.1
