On 4/9/25 6:09 PM, Maxime Ripard wrote:
> On Wed, Mar 26, 2025 at 12:19:56PM +0200, Cristian Ciocaltea wrote:
>> Try to make use of YUV420 when computing the best output format and
>> RGB cannot be supported for any of the available color depths.
>>
>> Signed-off-by: Cristian Ciocaltea <cristian.ciocal...@collabora.com>
>> ---
>> drivers/gpu/drm/display/drm_hdmi_state_helper.c | 10 ++++++++++
>> 1 file changed, 10 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/display/drm_hdmi_state_helper.c
>> b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
>> index
>> 6de0abb15ecb36fd4eb98725e2a3835e5e0db134..3859600c6af4a79f30858adfc9f9a710dfe561a5
>> 100644
>> --- a/drivers/gpu/drm/display/drm_hdmi_state_helper.c
>> +++ b/drivers/gpu/drm/display/drm_hdmi_state_helper.c
>> @@ -650,7 +650,17 @@ hdmi_compute_config(const struct drm_connector
>> *connector,
>>
>> ret = hdmi_compute_format_bpc(connector, conn_state, mode, max_bpc,
>> HDMI_COLORSPACE_RGB);
>> + if (!ret)
>> + return 0;
>>
>> + if (!connector->ycbcr_420_allowed) {
>> + drm_dbg_kms(connector->dev,
>> + "YUV420 output format not allowed for
>> connector.\n");
>> + return -EINVAL;
>> + }
>> +
>> + ret = hdmi_compute_format_bpc(connector, conn_state, mode, max_bpc,
>> + HDMI_COLORSPACE_YUV420);
>> return ret;
>
> I think I'd prefer to log a debug message there and return 0 if it
> succeeds, something like
Sure, will do.
> ret = hdmi_compute_format_bpc(..)
> if (ret) {
> drm_dbg("YUV420 doesn't work").
> return ret;
> }
>
> return 0;
