From: Ryan Lin <tsung-hua.lin@xxxxxxx>
[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@xxxxxxx>
Acked-by: Alan Liu <HaoPing.Liu@xxxxxxx>
Signed-off-by: Ryan Lin <tsung-hua.lin@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 5 +++++
drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h | 6 +++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
index cda1592c3a5b..2d3201b77d6a 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
@@ -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);
diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
index 9df330c86a55..34b03bc7f838 100644
--- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
+++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
@@ -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;
};
/**
--
2.25.1
