[PATCH 4.19 016/106] drm/amd/display: reprogram VM config when system resume

[Greg Kroah-Hartman]

From: Lewis Huang <lewis.hu...@amd.com>

[ Upstream commit e5382701c3520b3ed66169a6e4aa6ce5df8c56e0 ]

[Why]
The vm config will be clear to 0 when system enter S4. It will
cause hubbub didn't know how to fetch data when system resume.
The flip always pending because earliest_inuse_address and
request_address are different.

[How]
Reprogram VM config when system resume

Signed-off-by: Lewis Huang <lewis.hu...@amd.com>
Reviewed-by: Jun Lei <jun....@amd.com>
Acked-by: Eric Yang <eric.ya...@amd.com>
Acked-by: Leo Li <sunpeng...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c 
b/drivers/gpu/drm/amd/display/dc/core/dc.c
index f4b89d1ea6f6f..2b2efe443c36d 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1585,6 +1585,14 @@ void dc_set_power_state(
                dc_resource_state_construct(dc, dc->current_state);
 
                dc->hwss.init_hw(dc);
+
+#ifdef CONFIG_DRM_AMD_DC_DCN2_0
+               if (dc->hwss.init_sys_ctx != NULL &&
+                       dc->vm_pa_config.valid) {
+                       dc->hwss.init_sys_ctx(dc->hwseq, dc, &dc->vm_pa_config);
+               }
+#endif
+
                break;
        default:
 
-- 
2.20.1