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@cerno.tech --- 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;