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| author | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2015-09-21 10:45:33 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-09-23 17:28:12 +0200 |
| commit | 804beb4b5b76e41352b41027ab2804b8462c1686 (patch) | |
| tree | 6138aa0a0d39ed3682e83a107cb76b59d209c55b /drivers/gpu/drm/i915/i915_gem_gtt.c | |
| parent | fe47ea0cfa4adffe2a20edb22376d7af76b6a74c (diff) | |
| download | op-kernel-dev-804beb4b5b76e41352b41027ab2804b8462c1686.zip op-kernel-dev-804beb4b5b76e41352b41027ab2804b8462c1686.tar.gz | |
drm/i915: Support appending to the rotated pages mapping
By providing a start offset into the source array of pages, and returning the
end position in the scatter-gather table, we will be able to append the UV
plane to the rotated mapping in later patches.
v2: Rebase.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_gtt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_gtt.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 01f3521..2a8f64d 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -3244,15 +3244,18 @@ i915_gem_obj_lookup_or_create_ggtt_vma(struct drm_i915_gem_object *obj, } -static void -rotate_pages(dma_addr_t *in, unsigned int width, unsigned int height, - struct sg_table *st) +static struct scatterlist * +rotate_pages(dma_addr_t *in, unsigned int offset, + unsigned int width, unsigned int height, + struct sg_table *st, struct scatterlist *sg) { unsigned int column, row; unsigned int src_idx; - struct scatterlist *sg = st->sgl; - st->nents = 0; + if (!sg) { + st->nents = 0; + sg = st->sgl; + } for (column = 0; column < width; column++) { src_idx = width * (height - 1) + column; @@ -3263,12 +3266,14 @@ rotate_pages(dma_addr_t *in, unsigned int width, unsigned int height, * The only thing we need are DMA addresses. */ sg_set_page(sg, NULL, PAGE_SIZE, 0); - sg_dma_address(sg) = in[src_idx]; + sg_dma_address(sg) = in[offset + src_idx]; sg_dma_len(sg) = PAGE_SIZE; sg = sg_next(sg); src_idx -= width; } } + + return sg; } static struct sg_table * @@ -3306,9 +3311,9 @@ intel_rotate_fb_obj_pages(struct i915_ggtt_view *ggtt_view, } /* Rotate the pages. */ - rotate_pages(page_addr_list, + rotate_pages(page_addr_list, 0, rot_info->width_pages, rot_info->height_pages, - st); + st, NULL); DRM_DEBUG_KMS( "Created rotated page mapping for object size %zu (pitch=%u, height=%u, pixel_format=0x%x, %ux%u tiles, %u pages).\n", |
