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| author | Praful Swarnakar <Praful.Swarnakar@amd.com> | 2021-09-22 23:01:29 +0530 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-09-28 09:30:05 -0400 |
| commit | a74d0224d56a7b05f9fad3057c3cd8eee6e48525 (patch) | |
| tree | 16ce19a0a4128504930b1e5521a59b0812e9f0af /drivers/gpu | |
| parent | 71cf9e72b3121abb660dc18d91b4cb2b38963913 (diff) | |
| download | linux-a74d0224d56a7b05f9fad3057c3cd8eee6e48525.tar.gz linux-a74d0224d56a7b05f9fad3057c3cd8eee6e48525.tar.bz2 linux-a74d0224d56a7b05f9fad3057c3cd8eee6e48525.zip | |
drm/amd/display: Fix Display Flicker on embedded panels
[Why]
ASSR is dependent on Signed PSP Verstage to enable Content
Protection for eDP panels. Unsigned PSP verstage is used
during development phase causing ASSR to FAIL.
As a result, link training is performed with
DP_PANEL_MODE_DEFAULT instead of DP_PANEL_MODE_EDP for
eDP panels that causes display flicker on some panels.
[How]
- Do not change panel mode, if ASSR is disabled
- Just report and continue to perform eDP link training
with right settings further.
Signed-off-by: Praful Swarnakar <Praful.Swarnakar@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 6421c896f2a1..120c9955cafb 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -2419,14 +2419,13 @@ bool perform_link_training_with_retries( if (panel_mode == DP_PANEL_MODE_EDP) { struct cp_psp *cp_psp = &stream->ctx->cp_psp; - if (cp_psp && cp_psp->funcs.enable_assr) { - if (!cp_psp->funcs.enable_assr(cp_psp->handle, link)) { - /* since eDP implies ASSR on, change panel - * mode to disable ASSR - */ - panel_mode = DP_PANEL_MODE_DEFAULT; - } - } + if (cp_psp && cp_psp->funcs.enable_assr) + /* ASSR is bound to fail with unsigned PSP + * verstage used during devlopment phase. + * Report and continue with eDP panel mode to + * perform eDP link training with right settings + */ + cp_psp->funcs.enable_assr(cp_psp->handle, link); } #endif |