drm/amd/amdgpu: Fix srbm_indexing in init/inactive hqd code

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 14a6fbdf429b..cf2a4d76afbf 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -5462,6 +5462,7 @@ static void gfx_v8_0_inactive_hqd(struct amdgpu_device *adev,
 {
         int i;
 
+        mutex_lock(&adev->srbm_mutex);
         vi_srbm_select(adev, ring->me, ring->pipe, ring->queue, 0);
         if (RREG32(mmCP_HQD_ACTIVE) & CP_HQD_ACTIVE__ACTIVE_MASK) {
                 WREG32_FIELD(CP_HQD_DEQUEUE_REQUEST, DEQUEUE_REQ, 2);
@@ -5471,6 +5472,8 @@ static void gfx_v8_0_inactive_hqd(struct amdgpu_device *adev,
                         udelay(1);
                 }
         }
+        vi_srbm_select(adev, 0, 0, 0, 0);
+        mutex_unlock(&adev->srbm_mutex);
 }
 
 static int gfx_v8_0_pre_soft_reset(void *handle)
@@ -5576,11 +5579,13 @@ static int gfx_v8_0_soft_reset(void *handle)
 static void gfx_v8_0_init_hqd(struct amdgpu_device *adev,
                               struct amdgpu_ring *ring)
 {
+        mutex_lock(&adev->srbm_mutex);
         vi_srbm_select(adev, ring->me, ring->pipe, ring->queue, 0);
         WREG32(mmCP_HQD_DEQUEUE_REQUEST, 0);
         WREG32(mmCP_HQD_PQ_RPTR, 0);
         WREG32(mmCP_HQD_PQ_WPTR, 0);
         vi_srbm_select(adev, 0, 0, 0, 0);
+        mutex_unlock(&adev->srbm_mutex);
 }
 
 static int gfx_v8_0_post_soft_reset(void *handle)