Commit 1a2b886b authored by Ryan Lin's avatar Ryan Lin Committed by Alex Deucher
Browse files

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: default avatarRobin Chen <robin.chen@amd.com>
Acked-by: default avatarAlan Liu <HaoPing.Liu@amd.com>
Signed-off-by: default avatarRyan Lin <tsung-hua.lin@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 5abb360b

drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c

+5 −0
Original line number Diff line number Diff line
@@ -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);

drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h

+5 −1
Original line number Diff line number Diff line
@@ -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;

};



/**