[PATCH 02/18] drm/i915: Pass stride to rotate_pages()

ville.syrjala
2016-01-20T19:05:48Z

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Pass stride in addition to width and height to rotate_pages(). For now
width and stride are the same, but once framebuffer offsets enter the
scene that may no longer be the case.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index a3ea6b15c762..d547eecac242 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3333,6 +3333,7 @@ i915_gem_obj_lookup_or_create_ggtt_vma(struct drm_i915_gem_object *obj,
static struct scatterlist *
rotate_pages(const dma_addr_t *in, unsigned int offset,
unsigned int width, unsigned int height,
+ unsigned int stride,
struct sg_table *st, struct scatterlist *sg)
{
unsigned int column, row;
@@ -3344,7 +3345,7 @@ rotate_pages(const dma_addr_t *in, unsigned int offset,
}

for (column = 0; column < width; column++) {
- src_idx = width * (height - 1) + column;
+ src_idx = stride * (height - 1) + column;
for (row = 0; row < height; row++) {
st->nents++;
/* We don't need the pages, but need to initialize
@@ -3355,7 +3356,7 @@ rotate_pages(const dma_addr_t *in, unsigned int offset,
sg_dma_address(sg) = in[offset + src_idx];
sg_dma_len(sg) = PAGE_SIZE;
sg = sg_next(sg);
- src_idx -= width;
+ src_idx -= stride;
}
}

@@ -3408,6 +3409,7 @@ intel_rotate_fb_obj_pages(struct i915_ggtt_view *ggtt_view,
/* Rotate the pages. */
sg = rotate_pages(page_addr_list, 0,
rot_info->width_pages, rot_info->height_pages,
+ rot_info->width_pages,
st, NULL);

/* Append the UV plane if NV12. */
@@ -3423,6 +3425,7 @@ intel_rotate_fb_obj_pages(struct i915_ggtt_view *ggtt_view,
rotate_pages(page_addr_list, uv_start_page,
rot_info->width_pages_uv,
rot_info->height_pages_uv,
+ rot_info->width_pages_uv,
st, sg);
}

--
2.4.10