[PATCH] drm/amdgpu: Set doorbell range for gfx ring

[Jinzhou Su]

If there are 2 gfx rings, the doorbell lower range of second ring
will override the first ring.

Signed-off-by: Jinzhou.Su <Jinzhou.Su at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index ffbda6680a68..f33e54b01d3a 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -6357,8 +6357,11 @@ static int gfx_v10_0_gfx_mqd_init(struct amdgpu_ring *ring)
 				    DOORBELL_EN, 0);
 	mqd->cp_rb_doorbell_control = tmp;
 
-	/* set doorbell range */
-	gfx_v10_0_cp_gfx_set_doorbell(adev, ring);
+	/*if there are 2 gfx rings, set the lower doorbell range of the first ring,
+	 *otherwise the range of the second ring will override the first ring */
+	if (ring->doorbell_index == adev->doorbell_index.gfx_ring0 << 1)
+		gfx_v10_0_cp_gfx_set_doorbell(adev, ring);
+
 	/* reset read and write pointers, similar to CP_RB0_WPTR/_RPTR */
 	ring->wptr = 0;
 	mqd->cp_gfx_hqd_rptr = RREG32_SOC15(GC, 0, mmCP_GFX_HQD_RPTR);
-- 
2.17.1