From 7dba6e838e741caadcf27ef717b6dcb561e77f89 Mon Sep 17 00:00:00 2001 From: Haohui Mai Date: Mon, 25 Apr 2022 20:41:38 +0800 Subject: drm/amdgpu/sdma: Fix incorrect calculations of the wptr of the doorbells MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch fixes the issue where the driver miscomputes the 64-bit values of the wptr of the SDMA doorbell when initializing the hardware. SDMA engines v4 and later on have full 64-bit registers for wptr thus they should be set properly. Older generation hardwares like CIK / SI have only 16 / 20 / 24bits for the WPTR, where the calls of lower_32_bits() will be removed in a following patch. Reviewed-by: Christian König Signed-off-by: Haohui Mai Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c') diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c index ca50857b982d..8298926f8502 100644 --- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c @@ -295,8 +295,8 @@ static void sdma_v5_2_ring_set_wptr(struct amdgpu_ring *ring) if (ring->use_doorbell) { DRM_DEBUG("Using doorbell -- " "wptr_offs == 0x%08x " - "lower_32_bits(ring->wptr) << 2 == 0x%08x " - "upper_32_bits(ring->wptr) << 2 == 0x%08x\n", + "lower_32_bits(ring->wptr << 2) == 0x%08x " + "upper_32_bits(ring->wptr << 2) == 0x%08x\n", ring->wptr_offs, lower_32_bits(ring->wptr << 2), upper_32_bits(ring->wptr << 2)); @@ -672,8 +672,8 @@ static int sdma_v5_2_gfx_resume(struct amdgpu_device *adev) WREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_MINOR_PTR_UPDATE), 1); if (!amdgpu_sriov_vf(adev)) { /* only bare-metal use register write for wptr */ - WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_WPTR), lower_32_bits(ring->wptr) << 2); - WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_WPTR_HI), upper_32_bits(ring->wptr) << 2); + WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_WPTR), lower_32_bits(ring->wptr << 2)); + WREG32(sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_RB_WPTR_HI), upper_32_bits(ring->wptr << 2)); } doorbell = RREG32_SOC15_IP(GC, sdma_v5_2_get_reg_offset(adev, i, mmSDMA0_GFX_DOORBELL)); -- cgit v1.2.3