drm/amd/display: Fix green screen issue after suspend

[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is no longer valid.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@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 f8e4318..6cd6615 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3345,7 +3345,8 @@ 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;
@@ -3357,6 +3358,9 @@ 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;
 
@@ -3406,7 +3410,8 @@ fill_plane_buffer_attributes(struct amdgpu_device *adev,
                             union dc_tiling_info *tiling_info,
                             struct plane_size *plane_size,
                             struct dc_plane_dcc_param *dcc,
-                            struct dc_plane_address *address)
+                            struct dc_plane_address *address,
+                            bool force_disable_dcc)
 {
        const struct drm_framebuffer *fb = &afb->base;
        int ret;
@@ -3512,7 +3517,8 @@ 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;
        }
@@ -3604,7 +3610,8 @@ fill_dc_plane_info_and_addr(struct amdgpu_device *adev,
                            const struct drm_plane_state *plane_state,
                            const uint64_t tiling_flags,
                            struct dc_plane_info *plane_info,
-                           struct dc_plane_address *address)
+                           struct dc_plane_address *address,
+                           bool force_disable_dcc)
 {
        const struct drm_framebuffer *fb = plane_state->fb;
        const struct amdgpu_framebuffer *afb =
@@ -3686,7 +3693,8 @@ 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);
+                                          &plane_info->dcc, address,
+                                          force_disable_dcc);
        if (ret)
                return ret;
 
@@ -3709,6 +3717,7 @@ static int fill_dc_plane_attributes(struct amdgpu_device *adev,
        struct dc_plane_info plane_info;
        uint64_t tiling_flags;
        int ret;
+       bool force_disable_dcc = false;
 
        ret = fill_dc_scaling_info(plane_state, &scaling_info);
        if (ret)
@@ -3723,9 +3732,11 @@ 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);
+                                         &dc_plane_state->address,
+                                         force_disable_dcc);
        if (ret)
                return ret;
 
@@ -5343,6 +5354,7 @@ static int dm_plane_helper_prepare_fb(struct drm_plane *plane,
        uint64_t tiling_flags;
        uint32_t domain;
        int r;
+       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);
@@ -5401,11 +5413,13 @@ 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);
+                       &plane_state->address,
+                       force_disable_dcc);
        }
 
        return 0;
@@ -6678,7 +6692,12 @@ 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);
+                       &bundle->flip_addrs[planes_count].address,
+                       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];
@@ -8100,7 +8119,8 @@ 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);
+                                       &flip_addr->address,
+                                       false);
                                if (ret)
                                        goto cleanup;