[i-g-t,v3,1/5] lib/igt_fb: Let others use igt_get_fb_tile_size

Commit Message

Praveen Paneri July 18, 2017, 5:22 p.m. UTC

From: Praveen Paneri <[e-mail]>

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)
v3: Fixed errors in comments and coding style (Paulo)

Signed-off-by: Praveen Paneri <[e-mail]>
---
 lib/igt_fb.c | 15 +++++++++++++--
 lib/igt_fb.h |  2 ++
 2 files changed, 15 insertions(+), 2 deletions(-)

Patch

diff --git a/lib/igt_fb.c b/lib/igt_fb.c
index d2b7e9e..c94f95e 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -74,8 +74,19 @@  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: bits per pixel of the framebuffer
+ * @width_ret: width of the tile in bytes
+ * @height_ret: height of the tile in lines
+ *
+ * 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..010ed3a 100644
--- a/lib/igt_fb.h
+++ b/lib/igt_fb.h
@@ -95,6 +95,8 @@  enum igt_text_align {
 	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