diff options
| author | Fangzhi Zuo <Jerry.Zuo@amd.com> | 2021-05-10 12:01:42 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-05-27 12:24:45 -0400 |
| commit | 68d9821ff4d28eb880a0ebce60819ed8fbb730ca (patch) | |
| tree | 943095ec28bdef23692e7ba9071af774c8863523 /drivers/gpu/drm/amd/display | |
| parent | 4932d17697f243976286350a272d59a1b7cdb72b (diff) | |
drm/amd/display: Retrieve DSC Branch Decoder Caps
DSC extended branch decoder caps 0xA0 ~ 0xA2 is read from dsc_aux.
The dsc_aux is returned from drm dsc determination policy with the
right DSC capable MST branch device for decoding.
The values are all zero if DSC decoding at a MST BU with virtual DPCD;
The values are meaningful when DSC decoding at a MST BU without
virtual DPCD or at a DSC capable MST endpoint.
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c index e6b2eec9fb59..6f0a1fdccf7f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c @@ -160,6 +160,8 @@ static bool validate_dsc_caps_on_connector(struct amdgpu_dm_connector *aconnecto struct dc_sink *dc_sink = aconnector->dc_sink; struct drm_dp_mst_port *port = aconnector->port; u8 dsc_caps[16] = { 0 }; + u8 dsc_branch_dec_caps_raw[3] = { 0 }; // DSC branch decoder caps 0xA0 ~ 0xA2 + u8 *dsc_branch_dec_caps = NULL; aconnector->dsc_aux = drm_dp_mst_dsc_aux_for_port(port); #if defined(CONFIG_HP_HOOK_WORKAROUND) @@ -182,9 +184,13 @@ static bool validate_dsc_caps_on_connector(struct amdgpu_dm_connector *aconnecto if (drm_dp_dpcd_read(aconnector->dsc_aux, DP_DSC_SUPPORT, dsc_caps, 16) < 0) return false; + if (drm_dp_dpcd_read(aconnector->dsc_aux, + DP_DSC_BRANCH_OVERALL_THROUGHPUT_0, dsc_branch_dec_caps_raw, 3) == 3) + dsc_branch_dec_caps = dsc_branch_dec_caps_raw; + if (!dc_dsc_parse_dsc_dpcd(aconnector->dc_link->ctx->dc, - dsc_caps, NULL, - &dc_sink->dsc_caps.dsc_dec_caps)) + dsc_caps, dsc_branch_dec_caps, + &dc_sink->dsc_caps.dsc_dec_caps)) return false; return true; |