[why]
We have seen a green screen after resume from suspend in a Raven system
connected with two displays (HDMI and DP) on X based system. We noticed
that this issue is related to bad DCC metadata from user space which may
generate hangs and consequently an underflow on HUBP. After taking a
deep look at the code path we realized that after resume we try to
restore the commit with the DCC enabled framebuffer but the framebuffer
is no longer valid.
[how]
This problem was only reported on Raven based system and after suspend,
for this reason, this commit adds a new parameter on
fill_plane_dcc_attributes() to give the option of disabling DCC
programmatically. In summary, for disabling DCC we first verify if is a
Raven system and if it is in suspend; if both conditions are true we
disable DCC temporarily, otherwise, it is enabled.
Co-developed-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@xxxxxxx>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 38 ++++++++++++++-----
1 file changed, 29 insertions(+), 9 deletions(-)
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 209b9bf8bf11..04098b344ca3 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3421,7 +3421,8 @@ fill_plane_dcc_attributes(struct amdgpu_device *adev,
const union dc_tiling_info *tiling_info,
const uint64_t info,
struct dc_plane_dcc_param *dcc,
- struct dc_plane_address *address)
+ struct dc_plane_address *address,
+ bool force_disable_dcc)
{
struct dc *dc = adev->dm.dc;
struct dc_dcc_surface_param input;
@@ -3433,6 +3434,9 @@ fill_plane_dcc_attributes(struct amdgpu_device *adev,
memset(&input, 0, sizeof(input));
memset(&output, 0, sizeof(output));
+ if (force_disable_dcc)
+ return 0;
+
if (!offset)
return 0;
@@ -3483,7 +3487,8 @@ fill_plane_buffer_attributes(struct amdgpu_device *adev,
struct plane_size *plane_size,
struct dc_plane_dcc_param *dcc,
struct dc_plane_address *address,
- bool tmz_surface)
+ bool tmz_surface,
+ bool force_disable_dcc)
{
const struct drm_framebuffer *fb = &afb->base;
int ret;
@@ -3591,7 +3596,8 @@ fill_plane_buffer_attributes(struct amdgpu_device *adev,
ret = fill_plane_dcc_attributes(adev, afb, format, rotation,
plane_size, tiling_info,
- tiling_flags, dcc, address);
+ tiling_flags, dcc, address,
+ force_disable_dcc);
if (ret)
return ret;
}
@@ -3684,7 +3690,8 @@ fill_dc_plane_info_and_addr(struct amdgpu_device *adev,
const uint64_t tiling_flags,
struct dc_plane_info *plane_info,
struct dc_plane_address *address,
- bool tmz_surface)
+ bool tmz_surface,
+ bool force_disable_dcc)
{
const struct drm_framebuffer *fb = plane_state->fb;
const struct amdgpu_framebuffer *afb =
@@ -3766,7 +3773,8 @@ fill_dc_plane_info_and_addr(struct amdgpu_device *adev,
plane_info->rotation, tiling_flags,
&plane_info->tiling_info,
&plane_info->plane_size,
- &plane_info->dcc, address, tmz_surface);
+ &plane_info->dcc, address,
+ tmz_surface, force_disable_dcc);
if (ret)
return ret;
@@ -3790,6 +3798,7 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
uint64_t tiling_flags;
int ret;
bool tmz_surface = false;
+ bool force_disable_dcc = false;
ret = fill_dc_scaling_info(plane_state, &scaling_info);
if (ret)
@@ -3804,10 +3813,12 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
if (ret)
return ret;
+ force_disable_dcc = adev->asic_type == CHIP_RAVEN && adev->in_suspend;
ret = fill_dc_plane_info_and_addr(adev, plane_state, tiling_flags,
&plane_info,
&dc_plane_state->address,
- tmz_surface);
+ tmz_surface,
+ force_disable_dcc);
if (ret)
return ret;
@@ -5429,6 +5440,7 @@ static int dm_plane_helper_prepare_fb(struct drm_plane *plane,
uint32_t domain;
int r;
bool tmz_surface = false;
+ bool force_disable_dcc = false;
dm_plane_state_old = to_dm_plane_state(plane->state);
dm_plane_state_new = to_dm_plane_state(new_state);
@@ -5489,11 +5501,13 @@ static int dm_plane_helper_prepare_fb(struct drm_plane *plane,
dm_plane_state_old->dc_state != dm_plane_state_new->dc_state) {
struct dc_plane_state *plane_state = dm_plane_state_new->dc_state;
+ force_disable_dcc = adev->asic_type == CHIP_RAVEN && adev->in_suspend;
fill_plane_buffer_attributes(
adev, afb, plane_state->format, plane_state->rotation,
tiling_flags, &plane_state->tiling_info,
&plane_state->plane_size, &plane_state->dcc,
- &plane_state->address, tmz_surface);
+ &plane_state->address, tmz_surface,
+ force_disable_dcc);
}
return 0;
@@ -6773,7 +6787,12 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
fill_dc_plane_info_and_addr(
dm->adev, new_plane_state, tiling_flags,
&bundle->plane_infos[planes_count],
- &bundle->flip_addrs[planes_count].address, tmz_surface);
+ &bundle->flip_addrs[planes_count].address, tmz_surface,
+ false);
+
+ DRM_DEBUG_DRIVER("plane: id=%d dcc_en=%d\n",
+ new_plane_state->plane->index,
+ bundle->plane_infos[planes_count].dcc.enable);
bundle->surface_updates[planes_count].plane_info =
&bundle->plane_infos[planes_count];
@@ -8196,7 +8215,8 @@ dm_determine_update_type_for_commit(struct amdgpu_display_manager *dm,
ret = fill_dc_plane_info_and_addr(
dm->adev, new_plane_state, tiling_flags,
plane_info,
- &flip_addr->address, tmz_surface);
+ &flip_addr->address, tmz_surface,
+ false);
if (ret)
goto cleanup;
--
2.26.0
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