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sna: Use a shadow buffer for linear framebuffer 

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2014-08-14 17:38:49 +01:00
parent 0f1280bab9
commit 3bb9311e5d
1 changed files with 11 additions and 2 deletions
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13
src/sna/sna_display.c
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@ -1700,11 +1700,18 @@ static bool use_shadow(struct sna *sna, xf86CrtcPtr crtc)
pitch_limit = priv->gpu_bo->tiling ? 8 * 1024 : 16 * 1024;
else
pitch_limit = 8 * 1024;
DBG(("%s: gpu bo handle=%d tiling=%d pitch=%d, limit=%d\n", __FUNCTION__, priv->gpu_bo->handle, priv->gpu_bo->tiling, priv->gpu_bo->pitch, pitch_limit));
if (priv->gpu_bo->pitch > pitch_limit)
return true;
if (priv->gpu_bo->tiling && sna->flags & SNA_LINEAR_FB)
if (priv->gpu_bo->tiling && sna->flags & SNA_LINEAR_FB) {
DBG(("%s: gpu bo is tiled, needlinear, forcing shadow\n", __FUNCTION__));
return true;
}
if (!priv->gpu_bo->tiling && !(sna->flags & SNA_LINEAR_FB)) {
DBG(("%s: gpu bo is linear, forcing shadow\n", __FUNCTION__));
return true;
}
transform = NULL;
if (crtc->transformPresent)
@ -1837,8 +1844,10 @@ static struct kgem_bo *sna_crtc_attach(xf86CrtcPtr crtc)
} else {
DBG(("%s: attaching to framebuffer\n", __FUNCTION__));
bo = sna_pixmap_pin(sna->front, PIN_SCANOUT);
if (bo == NULL)
if (bo == NULL) {
DBG(("%s: failed to pin framebuffer\n", __FUNCTION__));
return NULL;
}
if (!get_fb(sna, bo, scrn->virtualX, scrn->virtualY))
return NULL;