drm/amdgpu/sdma3: set wptr shadow atomically (3e4b0bd9) · Commits · 戴 / test

Port it from sdma4 for wptr polling usage. Signed-off-by:

drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -379,8 +379,10 @@ static void sdma_v3_0_ring_set_wptr(struct amdgpu_ring *ring)
		struct amdgpu_device *adev = ring->adev;

		if (ring->use_doorbell) {
		u32 wb = (u32 )&adev->wb.wb[ring->wptr_offs];

		/* XXX check if swapping is necessary on BE */
		adev->wb.wb[ring->wptr_offs] = lower_32_bits(ring->wptr) << 2;
		WRITE_ONCE(*wb, (lower_32_bits(ring->wptr) << 2));
		WDOORBELL32(ring->doorbell_index, lower_32_bits(ring->wptr) << 2);
		} else {
		int me = (ring == &ring->adev->sdma.instance[0].ring) ? 0 : 1;