diff options
| author | Dave Airlie <airlied@linux.ie> | 2009-09-17 16:11:31 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2009-09-18 16:01:56 +1000 |
| commit | 7cbb355e947b3b426cefd9a3dc0dda3af9f9345a (patch) | |
| tree | db448cd1d25f5554e419d6a72ff9582b56337b5f /drivers/gpu/drm | |
| parent | 41456df2d45299c2eea5aaabafbaa2430ab9a124 (diff) | |
| download | linux-7cbb355e947b3b426cefd9a3dc0dda3af9f9345a.tar.bz2 | |
drm/r600/kms: fixup number of loops per blit calculation.
Some people were seeing
*ERROR* radeon: writting more dword to ring than expected
after certain blits, the loops calculation didn't take
into account that we do a separate blit for the remainder
after doing the aligned blits.
Acked-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/radeon/r600_blit_kms.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/gpu/drm/radeon/r600_blit_kms.c b/drivers/gpu/drm/radeon/r600_blit_kms.c index 4f0d181a690c..1287f4d3fb21 100644 --- a/drivers/gpu/drm/radeon/r600_blit_kms.c +++ b/drivers/gpu/drm/radeon/r600_blit_kms.c @@ -548,10 +548,13 @@ void r600_vb_ib_put(struct radeon_device *rdev) int r600_blit_prepare_copy(struct radeon_device *rdev, int size_bytes) { int r; - int ring_size; + int ring_size, line_size; int max_size; /* loops of emits 64 + fence emit possible */ - int dwords_per_loop = 76; + int dwords_per_loop = 76, num_loops; + + r = r600_vb_ib_get(rdev); + WARN_ON(r); /* set_render_target emits 2 extra dwords on rv6xx */ if (rdev->family > CHIP_R600 && rdev->family < CHIP_RV770) @@ -559,14 +562,18 @@ int r600_blit_prepare_copy(struct radeon_device *rdev, int size_bytes) /* 8 bpp vs 32 bpp for xfer unit */ if (size_bytes & 3) - max_size = 8192*8192; + line_size = 8192; else - max_size = 8192*8192*4; + line_size = 8192*4; - r = r600_vb_ib_get(rdev); - WARN_ON(r); + max_size = 8192 * line_size; - ring_size = ((size_bytes + max_size) / max_size) * dwords_per_loop; + /* major loops cover the max size transfer */ + num_loops = ((size_bytes + max_size) / max_size); + /* minor loops cover the extra non aligned bits */ + num_loops += ((size_bytes % line_size) ? 1 : 0); + /* calculate number of loops correctly */ + ring_size = num_loops * dwords_per_loop; /* set default + shaders */ ring_size += 40; /* shaders + def state */ ring_size += 3; /* fence emit for VB IB */ |