[PATCH 09/35] drm/amd/display: dmcu is blocking due to wrong disable ABM command

[Bhawanpreet Lakha]

From: Paul Hsieh <Paul.Hsieh at amd.com>

[Why]
Second screen to clone/extend mode, driver will send ABM pipe
command to DMCU. Change mode from clone/extend to second
screen only, driver send ABM level command to disable ABM but
this command will not clear ABM pipe data. At this time, change
second screen to PC screen only, driver will send first command
"ABM_LEVEL", it will turn on ABM with incorrect ABM pile so that
DMCU is blocking.

[How]
When driver try to disable ABM, change command from "ABM LEVEL"
to "ABM PIPE" so that it will clear ABM pile data.

Change-Id: Ib845fdde7a702b9f97f51367efe71e4b57e965fb
Signed-off-by: Paul Hsieh <Paul.Hsieh at amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_abm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
index 2a342eae80fd..01e56f1a9f34 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
@@ -314,8 +314,8 @@ static bool dce_abm_immediate_disable(struct abm *abm)
 
 	/* setDMCUParam_ABMLevel */
 	REG_UPDATE_2(MASTER_COMM_CMD_REG,
-			MASTER_COMM_CMD_REG_BYTE0, MCP_ABM_LEVEL_SET,
-			MASTER_COMM_CMD_REG_BYTE2, MCP_DISABLE_ABM_IMMEDIATELY);
+			MASTER_COMM_CMD_REG_BYTE0, MCP_ABM_PIPE_SET,
+			MASTER_COMM_CMD_REG_BYTE1, MCP_DISABLE_ABM_IMMEDIATELY);
 
 	/* notifyDMCUMsg */
 	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
-- 
2.17.1