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sna: Debug option to force particular upload/download paths 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2012-05-03 17:34:28 +01:00
parent f0d464d6b1
commit 1376c81dbf
1 changed files with 15 additions and 2 deletions
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17
src/sna/sna_io.c
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@ -42,6 +42,8 @@
#define PITCH(x, y) ALIGN((x)*(y), 4)
#define FORCE_INPLACE 0
/* XXX Need to avoid using GTT fenced access for I915_TILING_Y on 855GM */
static Bool
@ -109,6 +111,15 @@ static void read_boxes_inplace(struct kgem *kgem,
} while (--n);
}
static bool download_inplace(struct kgem *kgem, struct kgem_bo *bo)
{
if (FORCE_INPLACE)
return FORCE_INPLACE > 0;
return !kgem_bo_map_will_stall(kgem, bo) ||
bo->tiling == I915_TILING_NONE;
}
void sna_read_boxes(struct sna *sna,
struct kgem_bo *src_bo, int16_t src_dx, int16_t src_dy,
PixmapPtr dst, int16_t dst_dx, int16_t dst_dy,
@ -150,8 +161,7 @@ void sna_read_boxes(struct sna *sna,
* this path.
*/
if (!kgem_bo_map_will_stall(kgem, src_bo) ||
src_bo->tiling == I915_TILING_NONE) {
if (download_inplace(kgem, src_bo)) {
fallback:
read_boxes_inplace(kgem,
src_bo, src_dx, src_dy,
@ -512,6 +522,9 @@ static bool upload_inplace(struct kgem *kgem,
const BoxRec *box,
int n, int bpp)
{
if (FORCE_INPLACE)
return FORCE_INPLACE > 0;
/* If we are writing through the GTT, check first if we might be
* able to almagamate a series of small writes into a single
* operation.