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drm/i915/overlay: Tidy check_overlay_dst()

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Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2010-08-12 11:29:34 +01:00
parent 446d2183af
commit 9f7c3f442b
1 changed files with 16 additions and 12 deletions
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28
drivers/gpu/drm/i915/intel_overlay.c
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@ -989,25 +989,24 @@ static int check_overlay_src(struct drm_device *dev,
struct drm_intel_overlay_put_image *rec,
struct drm_gem_object *new_bo)
{
u32 stride_mask;
int depth;
int uv_hscale = uv_hsubsampling(rec->flags);
int uv_vscale = uv_vsubsampling(rec->flags);
size_t tmp;
u32 stride_mask, depth, tmp;
/* check src dimensions */
if (IS_845G(dev) || IS_I830(dev)) {
if (rec->src_height > IMAGE_MAX_HEIGHT_LEGACY ||
rec->src_width > IMAGE_MAX_WIDTH_LEGACY)
rec->src_width > IMAGE_MAX_WIDTH_LEGACY)
return -EINVAL;
} else {
if (rec->src_height > IMAGE_MAX_HEIGHT ||
rec->src_width > IMAGE_MAX_WIDTH)
rec->src_width > IMAGE_MAX_WIDTH)
return -EINVAL;
}
/* better safe than sorry, use 4 as the maximal subsampling ratio */
if (rec->src_height < N_VERT_Y_TAPS*4 ||
rec->src_width < N_HORIZ_Y_TAPS*4)
rec->src_width < N_HORIZ_Y_TAPS*4)
return -EINVAL;
/* check alignment constraints */
@ -1015,12 +1014,15 @@ static int check_overlay_src(struct drm_device *dev,
case I915_OVERLAY_RGB:
/* not implemented */
return -EINVAL;
case I915_OVERLAY_YUV_PACKED:
depth = packed_depth_bytes(rec->flags);
if (uv_vscale != 1)
return -EINVAL;
depth = packed_depth_bytes(rec->flags);
if (depth < 0)
return depth;
/* ignore UV planes */
rec->stride_UV = 0;
rec->offset_U = 0;
@ -1029,11 +1031,13 @@ static int check_overlay_src(struct drm_device *dev,
if (rec->offset_Y % depth)
return -EINVAL;
break;
case I915_OVERLAY_YUV_PLANAR:
if (uv_vscale < 0 || uv_hscale < 0)
return -EINVAL;
/* no offset restrictions for planar formats */
break;
default:
return -EINVAL;
}
@ -1053,8 +1057,8 @@ static int check_overlay_src(struct drm_device *dev,
return -EINVAL;
tmp = (rec->flags & I915_OVERLAY_TYPE_MASK) == I915_OVERLAY_YUV_PLANAR ?
4 : 8;
if (rec->stride_Y > tmp*1024 || rec->stride_UV > 2*1024)
4096 : 8192;
if (rec->stride_Y > tmp || rec->stride_UV > 2*1024)
return -EINVAL;
/* check buffer dimensions */
@ -1076,11 +1080,11 @@ static int check_overlay_src(struct drm_device *dev,
if (rec->src_width/uv_hscale > rec->stride_UV)
return -EINVAL;
tmp = rec->stride_Y*rec->src_height;
tmp = rec->stride_Y * rec->src_height;
if (rec->offset_Y + tmp > new_bo->size)
return -EINVAL;
tmp = rec->stride_UV*rec->src_height;
tmp /= uv_vscale;
tmp = rec->stride_UV * (rec->src_height / uv_vscale);
if (rec->offset_U + tmp > new_bo->size ||
rec->offset_V + tmp > new_bo->size)
return -EINVAL;