drm/amdgpu: fix vega10 graphic hang issue in S3 test

mmVGT_INDEX_TYPE has no default value, need to make sure
it's initialized when gfx is initialized.

Signed-off-by: Ken Wang <Ken.Wang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 9 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index b39f81dda847..69182eeca264 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -2157,7 +2157,7 @@ static int gfx_v9_0_cp_gfx_start(struct amdgpu_device *adev)
         struct amdgpu_ring *ring = &adev->gfx.gfx_ring[0];
         const struct cs_section_def *sect = NULL;
         const struct cs_extent_def *ext = NULL;
-        int r, i;
+        int r, i, tmp;
 
         /* init the CP */
         WREG32_SOC15(GC, 0, mmCP_MAX_CONTEXT, adev->gfx.config.max_hw_contexts - 1);
@@ -2165,7 +2165,7 @@ static int gfx_v9_0_cp_gfx_start(struct amdgpu_device *adev)
 
         gfx_v9_0_cp_gfx_enable(adev, true);
 
-        r = amdgpu_ring_alloc(ring, gfx_v9_0_get_csb_size(adev) + 4);
+        r = amdgpu_ring_alloc(ring, gfx_v9_0_get_csb_size(adev) + 4 + 3);
         if (r) {
                 DRM_ERROR("amdgpu: cp failed to lock ring (%d).\n", r);
                 return r;
@@ -2203,6 +2203,12 @@ static int gfx_v9_0_cp_gfx_start(struct amdgpu_device *adev)
         amdgpu_ring_write(ring, 0x8000);
         amdgpu_ring_write(ring, 0x8000);
 
+        amdgpu_ring_write(ring, PACKET3(PACKET3_SET_UCONFIG_REG,1));
+        tmp = (PACKET3_SET_UCONFIG_REG_INDEX_TYPE |
+                (SOC15_REG_OFFSET(GC, 0, mmVGT_INDEX_TYPE) - PACKET3_SET_UCONFIG_REG_START));
+        amdgpu_ring_write(ring, tmp);
+        amdgpu_ring_write(ring, 0);
+
         amdgpu_ring_commit(ring);
 
         return 0;
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15d.h b/drivers/gpu/drm/amd/amdgpu/soc15d.h
index e79befd80eed..7f408f85fdb6 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15d.h
+++ b/drivers/gpu/drm/amd/amdgpu/soc15d.h
@@ -250,6 +250,7 @@
 #define PACKET3_SET_UCONFIG_REG                         0x79
 #define         PACKET3_SET_UCONFIG_REG_START                   0x0000c000
 #define         PACKET3_SET_UCONFIG_REG_END                     0x0000c400
+#define         PACKET3_SET_UCONFIG_REG_INDEX_TYPE              (2 << 28)
 #define PACKET3_SCRATCH_RAM_WRITE                       0x7D
 #define PACKET3_SCRATCH_RAM_READ                        0x7E
 #define PACKET3_LOAD_CONST_RAM                          0x80