diff options
| author | Relja Vojvodic <Relja.Vojvodic@amd.com> | 2026-09-23 15:36:45 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-10-07 12:06:26 -0400 |
| commit | 0f87a995ce7e362540af3dffdc94938c6afb028f (patch) | |
| tree | d8c2c6da9925f92a76ba35f21b61b2c380a41ac1 /drivers/gpu/drm | |
| parent | f5d4af568c07591592c008590206d959cc5f135b (diff) | |
drm/amd/display: Update link training no timeout behaviour on HDMI
[Why & How]
- HMDI link training compliance testing fails when no timeout bit is
set
- Update condition to skip some link training logic when no timeout
is set
Reviewed-by: Chris Park <chris.park@amd.com>
Signed-off-by: Relja Vojvodic <Relja.Vojvodic@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c index 2f1b8c0bc8f8..5e0979ac3dcf 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c @@ -561,6 +561,16 @@ static enum link_result hdmi_frl_perform_link_training(struct ddc_service *ddc_s prev_flt_update = scdc_update.fields.FLT_UPDATE; } + if (flt_no_timeout) { + offset = HDMI_SCDC_SOURCE_TEST_REQ; + link_query_ddc_data(ddc_service, slave_address, &offset, + sizeof(offset), &test_req.byte, sizeof(test_req.byte)); + if (test_req.fields.FLT_NO_TIMEOUT == 0) { + FRL_INFO("FRL TEST REQ: FLT_no_timeout = %d \n", test_req.fields.FLT_NO_TIMEOUT); + return LINK_RESULT_SUCCESS; + } + } + /*Set TxFFE = TxFFE0*/ /*Program FFE_Levels - scdc_config has this field at 0 */ if (override_FFE) { @@ -583,7 +593,7 @@ static enum link_result hdmi_frl_perform_link_training(struct ddc_service *ddc_s FRL_INFO("FRL LINK TRAINING: TxFFE = %d.\n", current_FFE); override_FFE = false; } - if (scdc_update.fields.FLT_UPDATE || flt_no_timeout) { + if (scdc_update.fields.FLT_UPDATE) { offset = HDMI_SCDC_LTP_REQ; link_query_ddc_data(ddc_service, slave_address, &offset, sizeof(offset), ltp_req.byte, |