[PATCH AUTOSEL 4.19 16/50] drm/amd/display: reprogram VM config when system resume

Sasha Levin sashal at kernel.org
Tue Sep 24 16:48:13 UTC 2019

From: Lewis Huang <Lewis.Huang at amd.com>

[ Upstream commit e5382701c3520b3ed66169a6e4aa6ce5df8c56e0 ]

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.

Reprogram VM config when system resume

Signed-off-by: Lewis Huang <Lewis.Huang at amd.com>
Reviewed-by: Jun Lei <Jun.Lei at amd.com>
Acked-by: Eric Yang <eric.yang2 at amd.com>
Acked-by: Leo Li <sunpeng.li at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Sasha Levin <sashal at 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);
+		if (dc->hwss.init_sys_ctx != NULL &&
+			dc->vm_pa_config.valid) {
+			dc->hwss.init_sys_ctx(dc->hwseq, dc, &dc->vm_pa_config);
+		}

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