From: Alex Deucher Date: Thu, 9 Jan 2014 21:35:39 +0000 (-0500) Subject: drm/radeon/cik: use POLL_REG_MEM special op for sDMA HDP flush X-Git-Tag: v4.9.8~7008^2~15^2~17 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=da9e07e6f53eaac4e838bc8c987d87c5769be724;p=platform%2Fkernel%2Flinux-rpi3.git drm/radeon/cik: use POLL_REG_MEM special op for sDMA HDP flush This is the preferred flushing method on CIK. Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/radeon/cik_sdma.c b/drivers/gpu/drm/radeon/cik_sdma.c index d7e51c0..9abea87 100644 --- a/drivers/gpu/drm/radeon/cik_sdma.c +++ b/drivers/gpu/drm/radeon/cik_sdma.c @@ -168,13 +168,21 @@ static void cik_sdma_hdp_flush_ring_emit(struct radeon_device *rdev, int ridx) { struct radeon_ring *ring = &rdev->ring[ridx]; + u32 extra_bits = (SDMA_POLL_REG_MEM_EXTRA_OP(1) | + SDMA_POLL_REG_MEM_EXTRA_FUNC(3)); /* == */ + u32 ref_and_mask; - /* We should be using the new POLL_REG_MEM special op packet here - * but it causes sDMA to hang sometimes - */ - radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000)); - radeon_ring_write(ring, HDP_MEM_COHERENCY_FLUSH_CNTL >> 2); - radeon_ring_write(ring, 0); + if (ridx == R600_RING_TYPE_DMA_INDEX) + ref_and_mask = SDMA0; + else + ref_and_mask = SDMA1; + + radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_POLL_REG_MEM, 0, extra_bits)); + radeon_ring_write(ring, GPU_HDP_FLUSH_DONE); + radeon_ring_write(ring, GPU_HDP_FLUSH_REQ); + radeon_ring_write(ring, ref_and_mask); /* reference */ + radeon_ring_write(ring, ref_and_mask); /* mask */ + radeon_ring_write(ring, (0xfff << 16) | 10); /* retry count, poll interval */ } /**