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sna: Tweak alignment constraints on gen8 to allow BLT 

The previous commits prevent us from using the BLT if the destination
address is misaligned. Honour that restriction when creating buffers as
well, so that they are always usuable by the BLT.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2014-11-18 08:37:25 +00:00
parent 8dee529978
commit a90cc3b388
1 changed files with 3 additions and 1 deletions
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4
src/sna/kgem.c
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@ -1797,6 +1797,8 @@ inline static uint32_t kgem_pitch_alignment(struct kgem *kgem, unsigned flags)
return 256;
if (flags & CREATE_SCANOUT)
return 64;
if (kgem->gen >= 0100)
return 32;
return 8;
}
@ -7234,7 +7236,7 @@ struct kgem_bo *kgem_create_buffer_2d(struct kgem *kgem,
assert(width > 0 && height > 0);
assert(ret != NULL);
stride = ALIGN(width, 2) * bpp >> 3;
stride = ALIGN(stride, 4);
stride = ALIGN(stride, kgem->gen >= 0100 ? 32 : 4);
DBG(("%s: %dx%d, %d bpp, stride=%d\n",
__FUNCTION__, width, height, bpp, stride));