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drm/radeon: fix fence driver for dma ring when wb is disabled

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The dma ring can't write to register thus have to write to memory
its fence value. This ensure that it doesn't try to use scratch
register for dma ring fence driver.

Should fix:
https://bugs.freedesktop.org/show_bug.cgi?id=58166

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jerome Glisse 2012-12-12 16:43:15 -05:00 committed by Alex Deucher
parent 5aa709be7e
commit 86a1881d08
2 changed files with 3 additions and 2 deletions
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3
drivers/gpu/drm/radeon/r600.c
View file

@ -2533,11 +2533,12 @@ void r600_dma_fence_ring_emit(struct radeon_device *rdev,
{
struct radeon_ring *ring = &rdev->ring[fence->ring];
u64 addr = rdev->fence_drv[fence->ring].gpu_addr;
/* write the fence */
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0, 0));
radeon_ring_write(ring, addr & 0xfffffffc);
radeon_ring_write(ring, (upper_32_bits(addr) & 0xff));
radeon_ring_write(ring, fence->seq);
radeon_ring_write(ring, lower_32_bits(fence->seq));
/* generate an interrupt */
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_TRAP, 0, 0, 0));
}

2
drivers/gpu/drm/radeon/radeon_fence.c
View file

@ -772,7 +772,7 @@ int radeon_fence_driver_start_ring(struct radeon_device *rdev, int ring)
int r;
radeon_scratch_free(rdev, rdev->fence_drv[ring].scratch_reg);
if (rdev->wb.use_event) {
if (rdev->wb.use_event || !radeon_ring_supports_scratch_reg(rdev, &rdev->ring[ring])) {
rdev->fence_drv[ring].scratch_reg = 0;
index = R600_WB_EVENT_OFFSET + ring * 4;
} else {