[Intel-gfx] [PATCH v2 1/7] lib/igt_fb: Let others use igt_get_fb_tile_size

[Praveen Paneri]

This function can be used by igt_draw to get accurate
tile dimensions for all tile formats.

v2: Added comments to function igt_get_fb_tile_size (Daniel)

Signed-off-by: Praveen Paneri <praveen.paneri at intel.com>
---
 lib/igt_fb.c | 16 +++++++++++++---
 lib/igt_fb.h |  3 ++-
 2 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/lib/igt_fb.c b/lib/igt_fb.c
index d2b7e9e..9ba1e3b 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -73,9 +73,19 @@ static struct format_desc_struct {
 
 #define for_each_format(f)	\
 	for (f = format_desc; f - format_desc < ARRAY_SIZE(format_desc); f++)
-
-static void igt_get_fb_tile_size(int fd, uint64_t tiling, int fb_bpp,
-				 unsigned *width_ret, unsigned *height_ret)
+/**
+ * igt_get_fb_tile_size:
+ * @fd: The DRM file descriptor
+ * @tiling: Tiling layout of the framebuffer (as framebuffer modifier)
+ * @fb_bpp: Bytes per pixel of the framebuffer
+ * @width_ret: Width of the tile in pixels
+ * @height_ret: Height of the tile in pixels
+ *
+ * This function returns width and height of a tile based on the given tiling
+ * format.
+ */
+void igt_get_fb_tile_size(int fd, uint64_t tiling, int fb_bpp,
+			  unsigned *width_ret, unsigned *height_ret)
 {
 	switch (tiling) {
 	case LOCAL_DRM_FORMAT_MOD_NONE:
diff --git a/lib/igt_fb.h b/lib/igt_fb.h
index 4a680ce..414cb3d 100644
--- a/lib/igt_fb.h
+++ b/lib/igt_fb.h
@@ -94,7 +94,8 @@ enum igt_text_align {
 	align_vcenter	= 0x04,
 	align_hcenter	= 0x08,
 };
-
+void igt_get_fb_tile_size(int fd, uint64_t tiling, int fb_bpp,
+			  unsigned *width_ret, unsigned *height_ret);
 void igt_calc_fb_size(int fd, int width, int height, int bpp, uint64_t tiling,
 		      unsigned *size_ret, unsigned *stride_ret);
 unsigned int
-- 
1.9.1