When using the modes that need the highest pixel rate we support (such
as 4k at 60Hz), using a 10 or 12 bpc output will put us over the limit
of what we can achieve.
In such a case, let's force our output to be YUV422 so that we can go
back down under the required clock rate.
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 04eb1ab9dad3..5b8b2688a3f4 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1411,8 +1411,15 @@ vc4_hdmi_encoder_compute_config(struct vc4_hdmi *vc4_hdmi,
vc4_state, mode,
conn_state->max_bpc,
format);
- if (ret)
- return ret;
+ if (ret) {
+ format = VC4_HDMI_OUTPUT_YUV422;
+ ret = vc4_hdmi_encoder_compute_clock(vc4_hdmi,
+ vc4_state, mode,
+ conn_state->max_bpc,
+ format);
+ if (ret)
+ return ret;
+ }
vc4_state->output_format = format;
return ret;
--
2.33.1
