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From 59189d534fb52a6b786d71130e39bf5648c8d37d Mon Sep 17 00:00:00 2001
From: Junwei Zhang <Jerry.Zhang@amd.com>
Date: Wed, 31 Oct 2018 10:36:34 +0800
Subject: [PATCH 0740/2940] drm/amdgpu: fix gfx wptr for sdma v4
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The wptr value will be shitfed when function returns.
Remove the redundant shift and clean up.
Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index ec1b2f3ec01e..7f9a501c919d 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -372,16 +372,11 @@ static uint64_t sdma_v4_0_ring_get_wptr(struct amdgpu_ring *ring)
wptr = READ_ONCE(*((u64 *)&adev->wb.wb[ring->wptr_offs]));
DRM_DEBUG("wptr/doorbell before shift == 0x%016llx\n", wptr);
} else {
- u32 lowbit, highbit;
-
- lowbit = RREG32_SDMA(ring->me, mmSDMA0_GFX_RB_WPTR) >> 2;
- highbit = RREG32_SDMA(ring->me, mmSDMA0_GFX_RB_WPTR_HI) >> 2;
-
- DRM_DEBUG("wptr [%i]high== 0x%08x low==0x%08x\n",
- ring->me, highbit, lowbit);
- wptr = highbit;
+ wptr = RREG32_SDMA(ring->me, mmSDMA0_GFX_RB_WPTR_HI);
wptr = wptr << 32;
- wptr |= lowbit;
+ wptr |= RREG32_SDMA(ring->me, mmSDMA0_GFX_RB_WPTR);
+ DRM_DEBUG("wptr before shift [%i] wptr == 0x%016llx\n",
+ ring->me, wptr);
}
return wptr >> 2;
--
2.17.1
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