[PATCH 17/42] drm/amd/display: Flip pending check timeout due to disabled hubp

[Aurabindo Pillai]

From: Aric Cyr <aric.cyr at amd.com>

[Why]
When pipe locks are being taken we wait for flip pending to clear first.
In some cases the pipe mapping is changed and the pending we're checking
for will never clear.

[How]
Don't check disabled pipes for flip pending.

Signed-off-by: Aric Cyr <aric.cyr at amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c | 3 +++
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubp.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
index cedf359a00f5..db5615a51fea 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c
@@ -734,6 +734,9 @@ bool hubp1_is_flip_pending(struct hubp *hubp)
 	struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
 	struct dc_plane_address earliest_inuse_address;
 
+	if (hubp && hubp->power_gated)
+		return false;
+
 	REG_GET(DCSURF_FLIP_CONTROL,
 			SURFACE_FLIP_PENDING, &flip_pending);
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubp.c
index bb920d0e0b89..368818d2dfc6 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubp.c
@@ -908,6 +908,9 @@ bool hubp2_is_flip_pending(struct hubp *hubp)
 	struct dcn20_hubp *hubp2 = TO_DCN20_HUBP(hubp);
 	struct dc_plane_address earliest_inuse_address;
 
+	if (hubp && hubp->power_gated)
+		return false;
+
 	REG_GET(DCSURF_FLIP_CONTROL,
 			SURFACE_FLIP_PENDING, &flip_pending);
 
-- 
2.25.1