diff options
| author | Wayne Lin <Wayne.Lin@amd.com> | 2025-05-20 09:34:42 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-05-22 12:02:40 -0400 |
| commit | 076873e5b360ccd91687e23c6ca0042a0356b9eb (patch) | |
| tree | befdeef32055890bd6990cbca1228a45c1cee2dd | |
| parent | 02fd27e6cf853e55cebcefb4aa7a9828a6848510 (diff) | |
drm/amd/display: Add a new dcdebugmask to allow skip detection LT
Under specific embedded scenarios, we might still use DP interface
rather than eDP interface. Under such case, detection link training
is unnecessary.
Add a new dcdebugmask value that can be used to skip the detection LT
Reviewed-by: Tom Chung <chiahsuan.chung@amd.com>
Link: https://lore.kernel.org/amd-gfx/20250521063934.2111323-1-Wayne.Lin@amd.com/
Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/include/amd_shared.h | 5 |
2 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 4b4e9241619f..2bb347771aa1 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -2020,6 +2020,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) if (amdgpu_dc_debug_mask & DC_HDCP_LC_ENABLE_SW_FALLBACK) adev->dm.dc->debug.hdcp_lc_enable_sw_fallback = true; + if (amdgpu_dc_debug_mask & DC_SKIP_DETECTION_LT) + adev->dm.dc->debug.skip_detection_link_training = true; + adev->dm.dc->debug.visual_confirm = amdgpu_dc_visual_confirm; /* TODO: Remove after DP2 receiver gets proper support of Cable ID feature */ diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h index c8eccee9b023..31de36c9156f 100644 --- a/drivers/gpu/drm/amd/include/amd_shared.h +++ b/drivers/gpu/drm/amd/include/amd_shared.h @@ -370,6 +370,11 @@ enum DC_DEBUG_MASK { * path failure, retry using legacy SW path. */ DC_HDCP_LC_ENABLE_SW_FALLBACK = 0x100000, + + /** + * @DC_SKIP_DETECTION_LT: If set, skip detection link training + */ + DC_SKIP_DETECTION_LT = 0x200000, }; enum amd_dpm_forced_level; |