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drm/amd/display: Waiting for 1 frame to fix the flash issue on PSR1 

[Why]
Needs more frames waiting before the PSR_Exit sending for the specific
TCON.

[How]
Add relock_delay_frame_cnt to control how many frames waiting are needed
before the PSR_Exit sending. The default value is 0. The Driver side can
set this variable for specific TCONs.

Reviewed-by: Robin Chen <robin.chen@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Ryan Lin <tsung-hua.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ryan Lin 2022-10-26 15:12:26 +08:00 committed by Alex Deucher
parent 5abb360ba7
commit 1a2b886b1f
2 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
View File

@ -413,6 +413,11 @@ static bool dmub_psr_copy_settings(struct dmub_psr *dmub,
else
copy_settings_data->debug.bitfields.force_wakeup_by_tps3 = 0;
//WA for PSR1 on specific TCON, require frame delay for frame re-lock
copy_settings_data->relock_delay_frame_cnt = 0;
if (link->dpcd_caps.sink_dev_id == DP_BRANCH_DEVICE_ID_001CF8)
copy_settings_data->relock_delay_frame_cnt = 2;
dc_dmub_srv_cmd_queue(dc->dmub_srv, &cmd);
dc_dmub_srv_cmd_execute(dc->dmub_srv);
dc_dmub_srv_wait_idle(dc->dmub_srv);

6
drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
View File

@ -1876,10 +1876,14 @@ struct dmub_cmd_psr_copy_settings_data {
* Use FSM state for PSR power up/down
*/
uint8_t use_phy_fsm;
/**
* frame delay for frame re-lock
*/
uint8_t relock_delay_frame_cnt;
/**
* Explicit padding to 2 byte boundary.
*/
uint8_t pad3[2];
uint8_t pad3;
};
/**