From: David Zhang <dingchen.zhang@xxxxxxx>
[ Upstream commit 6cc5c77300afbb285c4f41e04f3435ae3c484c40 ]
[why]
When DC driver send PSR exit dmub command to DMUB FW, it might not
wait until PSR exit. Then it may hit the following deadlock situation.
1. DC driver send HW LOCK command to DMUB FW due to frame update
2. DMUB FW Set the HW lock
3. DMUB execute PSR exit sequence and stuck at polling DPG Pending
register due to the HW Lock is set
4. DC driver ask DMUB FW to unlock HW lock, but DMUB FW is polling
DPG pending register
[how]
The reason why DC driver doesn't wait until PSR exit is because some of
the PSR state machine state is not update the dc driver. So when DC
driver read back the PSR state, it take the state for PSR inactive.
Signed-off-by: David Zhang <dingchen.zhang@xxxxxxx>
Acked-by: Leo Li <sunpeng.li@xxxxxxx>
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dc_types.h | 7 +++++++
drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c | 16 ++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
index c1532930169b..ac8442f6f4da 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -639,10 +639,17 @@ enum dc_psr_state {
PSR_STATE4b,
PSR_STATE4c,
PSR_STATE4d,
+ PSR_STATE4_FULL_FRAME,
+ PSR_STATE4a_FULL_FRAME,
+ PSR_STATE4b_FULL_FRAME,
+ PSR_STATE4c_FULL_FRAME,
+ PSR_STATE4_FULL_FRAME_POWERUP,
PSR_STATE5,
PSR_STATE5a,
PSR_STATE5b,
PSR_STATE5c,
+ PSR_STATE_HWLOCK_MGR,
+ PSR_STATE_POLLVUPDATE,
PSR_STATE_INVALID = 0xFF
};
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 aa8403bc4c83..0dac025f8f02 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_psr.c
@@ -72,6 +72,22 @@ static enum dc_psr_state convert_psr_state(uint32_t raw_state)
state = PSR_STATE5b;
else if (raw_state == 0x53)
state = PSR_STATE5c;
+ else if (raw_state == 0x4A)
+ state = PSR_STATE4_FULL_FRAME;
+ else if (raw_state == 0x4B)
+ state = PSR_STATE4a_FULL_FRAME;
+ else if (raw_state == 0x4C)
+ state = PSR_STATE4b_FULL_FRAME;
+ else if (raw_state == 0x4D)
+ state = PSR_STATE4c_FULL_FRAME;
+ else if (raw_state == 0x4E)
+ state = PSR_STATE4_FULL_FRAME_POWERUP;
+ else if (raw_state == 0x60)
+ state = PSR_STATE_HWLOCK_MGR;
+ else if (raw_state == 0x61)
+ state = PSR_STATE_POLLVUPDATE;
+ else
+ state = PSR_STATE_INVALID;
return state;
}
--
2.35.1
