[PATCH 17/22] drm/i915: Shrink struct intel_remapped_plane_info

[Imre Deak]

Let's save some place by using u16 instead of unsigned int for members
of the intel_remapped_plane_info struct storing page count for the view
dimensions. The maximum stride is 256kB or 4096 yf-tiles (smallest tile
width) and the maximum height is 16kPixels or 2048 x-tiles (smallest
tile height).

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/i915_vma_types.h | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_vma_types.h b/drivers/gpu/drm/i915/i915_vma_types.h
index f5cb848b7a7e..358b4306fc00 100644
--- a/drivers/gpu/drm/i915/i915_vma_types.h
+++ b/drivers/gpu/drm/i915/i915_vma_types.h
@@ -97,12 +97,16 @@ enum i915_cache_level;
 
 struct intel_remapped_plane_info {
 	/* in gtt pages */
-	unsigned int width, height, stride, offset;
+	u32 offset;
+	u16 width;
+	u16 height;
+	u16 stride;
+	u16 unused_mbz;
 } __packed;
 
 struct intel_remapped_info {
 	struct intel_remapped_plane_info plane[2];
-	unsigned int unused_mbz;
+	u32 unused_mbz;
 } __packed;
 
 struct intel_rotation_info {
@@ -123,9 +127,9 @@ enum i915_ggtt_view_type {
 
 static inline void assert_i915_gem_gtt_types(void)
 {
-	BUILD_BUG_ON(sizeof(struct intel_rotation_info) != 8*sizeof(unsigned int));
+	BUILD_BUG_ON(sizeof(struct intel_rotation_info) != 2 * sizeof(u32) + 8 * sizeof(u16));
 	BUILD_BUG_ON(sizeof(struct intel_partial_info) != sizeof(u64) + sizeof(unsigned int));
-	BUILD_BUG_ON(sizeof(struct intel_remapped_info) != 9*sizeof(unsigned int));
+	BUILD_BUG_ON(sizeof(struct intel_remapped_info) != 3 * sizeof(u32) + 8 * sizeof(u16));
 
 	/* Check that rotation/remapped shares offsets for simplicity */
 	BUILD_BUG_ON(offsetof(struct intel_remapped_info, plane[0]) !=
-- 
2.25.1