drm/amd/display: Clear cached watermark after resume

charliu-AMDENG · alexdeucher · commit fa8a4d3659d0 · 2024-09-18T16:15:08.000-04:00
[WHY]
Driver could skip program watermarks when resume from S0i3/S4.

[HOW]
Clear the cached one first to make sure new value gets applied.

Reviewed-by: Alvin Lee &lt;alvin.lee2@amd.com&gt;
Reviewed-by: Roman Li &lt;roman.li@amd.com&gt;
Signed-off-by: Charlene Liu &lt;Charlene.Liu@amd.com&gt;
Signed-off-by: Alex Hung &lt;alex.hung@amd.com&gt;
Tested-by: Daniel Wheeler &lt;daniel.wheeler@amd.com&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
diff --git a/drivers/gpu/drm/amd/display/dc/hubbub/dcn35/dcn35_hubbub.c b/drivers/gpu/drm/amd/display/dc/hubbub/dcn35/dcn35_hubbub.c
@@ -545,6 +545,7 @@ static void hubbub35_init(struct hubbub *hubbub)
 			DCHUBBUB_ARB_MAX_REQ_OUTSTAND, 256,
 			DCHUBBUB_ARB_MIN_REQ_OUTSTAND, 256);
 
+	memset(&hubbub2->watermarks.a.cstate_pstate, 0, sizeof(hubbub2->watermarks.a.cstate_pstate));
 }
 
 /*static void hubbub35_set_request_limit(struct hubbub *hubbub,

Original file line number	Diff line number	Diff line change
`@@ -545,6 +545,7 @@ static void hubbub35_init(struct hubbub *hubbub)`
`545`	`545`	`DCHUBBUB_ARB_MAX_REQ_OUTSTAND, 256,`
`546`	`546`	`DCHUBBUB_ARB_MIN_REQ_OUTSTAND, 256);`
`547`	`547`
	`548`	`+ memset(&hubbub2->watermarks.a.cstate_pstate, 0, sizeof(hubbub2->watermarks.a.cstate_pstate));`
`548`	`549`	`}`
`549`	`550`
`550`	`551`	`/static void hubbub35_set_request_limit(struct hubbub hubbub,`