[PATCH 5/5] drm/amd/display: Allow HDMI capabilities over DVI connector (DC)

[Jeffrey Smith]

This did work for me, including stereo 3D, so that is rather disappointing.
(DVI output of the card -> DVI/HDMI adapter -> HDMI Cable -> HDMI TV input)

Is it that HDMI signaling passing through a DVI connector is dis-allowed
on the whole, or is there something more subtle that I am missing?

Would it be allowed if only accessible through a kernel parameter?


On Wed, Mar 1, 2017 at 5:11 PM, Harry Wentland <harry.wentland at amd.com>
wrote:

> On 2017-02-24 07:14 PM, Jeff Smith wrote:
>
>> Signed-off-by: Jeff Smith <whydoubt at gmail.com>
>> ---
>>  drivers/gpu/drm/amd/display/dc/core/dc_link.c | 7 ++++++-
>>  1 file changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
>> b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
>> index 2b92939..168f260 100644
>> --- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
>> +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
>> @@ -706,8 +706,13 @@ bool dc_link_detect(const struct dc_link *dc_link,
>> bool boot)
>>
>>                 /* HDMI-DVI Dongle */
>>                 if (dc_sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A &&
>> -                               !dc_sink->edid_caps.edid_hdmi)
>> +                               !dc_sink->edid_caps.edid_hdmi) {
>>                         dc_sink->sink_signal =
>> SIGNAL_TYPE_DVI_SINGLE_LINK;
>> +               } else if ((dc_sink->sink_signal ==
>> SIGNAL_TYPE_DVI_SINGLE_LINK ||
>> +                               dc_sink->sink_signal ==
>> SIGNAL_TYPE_DVI_DUAL_LINK) &&
>> +                               dc_sink->edid_caps.edid_hdmi) {
>> +                       dc_sink->sink_signal = SIGNAL_TYPE_HDMI_TYPE_A;
>> +               }
>>
>
> This won't pass HDMI compliance.
>
> Harry
>
>
>
>>                 /* Connectivity log: detection */
>>                 for (i = 0; i < sink->public.dc_edid.length /
>> EDID_BLOCK_SIZE; i++) {
>>
>>
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