iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

drm/amd/display: PSRSU+DSC WA for specific TCON

Browse Source 
[why]
Some specific TCON chip has HW limitation to support PSRSU+DSC.

[how]
Force ffu mode when DSC enabled if we detect it is the specific
model from sink OUI DPCD. And disable ABM update for this case.

Signed-off-by: David Zhang <dingchen.zhang@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Zhang 2022-05-03 18:19:39 -04:00 committed by Alex Deucher
parent c2a050c5e0
commit e61a048eab
2 changed files with 15 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/amd/display/dc/dc_link.h
View File

@ -108,6 +108,7 @@ struct psr_settings {
*/
bool psr_frame_capture_indication_req;
unsigned int psr_sdp_transmit_line_num_deadline;
uint8_t force_ffu_mode;
unsigned int psr_power_opt;
};

14
drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
View File

@ -349,6 +349,7 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
copy_settings_data->debug.u32All = 0;
copy_settings_data->debug.bitfields.visual_confirm = dc->dc->debug.visual_confirm == VISUAL_CONFIRM_PSR;
copy_settings_data->debug.bitfields.use_hw_lock_mgr = 1;
copy_settings_data->debug.bitfields.force_full_frame_update = 0;
if (psr_context->su_granularity_required == 0)
copy_settings_data->su_y_granularity = 0;
@ -363,6 +364,19 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
copy_settings_data->panel_inst = panel_inst;
copy_settings_data->dsc_enable_status = (pipe_ctx->stream->timing.flags.DSC == 1);
/**
* WA for PSRSU+DSC on specific TCON, if DSC is enabled, force PSRSU as ffu mode(full frame update)
* Note that PSRSU+DSC is still under development.
*/
if (copy_settings_data->dsc_enable_status &&
link->dpcd_caps.sink_dev_id == DP_DEVICE_ID_38EC11 &&
!memcmp(link->dpcd_caps.sink_dev_id_str, DP_SINK_DEVICE_STR_ID_1,
sizeof(link->dpcd_caps.sink_dev_id_str)))
link->psr_settings.force_ffu_mode = 1;
else
link->psr_settings.force_ffu_mode = 0;
copy_settings_data->force_ffu_mode = link->psr_settings.force_ffu_mode;
if (link->fec_state == dc_link_fec_enabled &&
(!memcmp(link->dpcd_caps.sink_dev_id_str, DP_SINK_DEVICE_STR_ID_1,
sizeof(link->dpcd_caps.sink_dev_id_str)) ||