[PATCH 01/16] drm/amd/display: Fix DPIA outbox timeout after GPU reset

[Qingqing Zhuo]

From: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>

[Why]
The HW interrupt gets disabled after GPU reset so we don't receive
notifications for HPD or AUX from DMUB - leading to timeout and
black screen with (or without) DPIA links connected.

[How]
Re-enable the interrupt after GPU reset like we do for the other
DC interrupts.

Fixes: 81927e2808be ("drm/amd/display: Support for DMUB AUX")

Reviewed-by: Jude Shih <jude.s...@amd.com>
Acked-by: Qingqing Zhuo <qingqing.z...@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 
b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 26fcc8911698..c88054f8c583 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2562,6 +2562,8 @@ static int dm_resume(void *handle)
        if (amdgpu_in_reset(adev)) {
                dc_state = dm->cached_dc_state;
 
+               amdgpu_dm_outbox_init(adev);
+
                r = dm_dmub_hw_init(adev);
                if (r)
                        DRM_ERROR("DMUB interface failed to initialize: 
status=%d\n", r);
-- 
2.25.1