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drm/amd/display: Don't repeat DAC load detection

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The analog link detection code path had already performed the
DAC load detection by the time the EDID read is attempted.
So there is no need to repeat the DAC load detection,
we can know that no display is connected if no EDID is read.

Fixes: ac1bb49522 ("drm/amd/display: Use DAC load detection on analog connectors (v2)")
Suggested-by: Alex Hung <alex.hung@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Timur Kristóf 2025-12-06 03:31:06 +01:00 committed by Alex Deucher
parent bb5dfe2f56
commit 0d89268d20
1 changed files with 3 additions and 4 deletions
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7
drivers/gpu/drm/amd/display/dc/link/link_detection.c
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@ -1173,11 +1173,10 @@ static bool detect_link_and_local_sink(struct dc_link *link,
* - cheap DVI-A cable or adapter that doesn't connect DDC
*/
if (dc_connector_supports_analog(link->link_id.id)) {
/* If we didn't do DAC load detection yet, do it now
* to verify there really is a display connected.
/* If we didn't already detect a display using
* DAC load detection, we know it isn't connected.
*/
if (link->type != dc_connection_analog_load &&
!link_detect_dac_load_detect(link)) {
if (link->type != dc_connection_analog_load) {
if (prev_sink)
dc_sink_release(prev_sink);
link_disconnect_sink(link);