On Wed, Jan 02, 2013 at 06:37:23PM -0500, Alex Deucher wrote:From: Alex Deucher <alexander.deucher@xxxxxxx>Thanks, will run it on the box in question next week when I have access.
Date: Wed, 2 Jan 2013 18:30:21 -0500
Subject: [PATCH] drm/radeon/r6xx: fix DMA engine for ttm bo transfers
count must be a multiple of 2.
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Btw, you could add the note about count needing to be a multiple of 2 as
a comment in the code below, for future reference.
---
drivers/gpu/drm/radeon/r600.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index 2aaf147..9f4ce5e 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -2636,8 +2636,8 @@ int r600_copy_dma(struct radeon_device *rdev,
for (i = 0; i < num_loops; i++) {
cur_size_in_dw = size_in_dw;
- if (cur_size_in_dw > 0xFFFF)
- cur_size_in_dw = 0xFFFF;
+ if (cur_size_in_dw > 0xFFFE)
+ cur_size_in_dw = 0xFFFE;
size_in_dw -= cur_size_in_dw;
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 0, 0, cur_size_in_dw));
radeon_ring_write(ring, dst_offset & 0xfffffffc);
--
1.7.7.5