[igt-dev] [PATCH i-g-t v6 03/10] igt: fb: Account for all planes bpp

[Maxime Ripard]

When allocating a dumb buffer for a format with multiple plane, we need to
account for all plane's bpp in order to allocate the proper size.

Let's add all the planes bpp and use the result to allocate our buffer.

Reviewed-by: Paul Kocialkowski <paul.kocialkowski at bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard at bootlin.com>
---
 lib/igt_fb.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/igt_fb.c b/lib/igt_fb.c
index ca4865519c13..ca19c034f4a3 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -528,6 +528,9 @@ static void clear_yuv_buffer(struct igt_fb *fb)
 /* helpers to create nice-looking framebuffers */
 static int create_bo_for_fb(struct igt_fb *fb)
 {
+	const struct format_desc_struct *fmt = lookup_drm_format(fb->drm_format);
+	unsigned int bpp = 0;
+	unsigned int plane;
 	int fd = fb->fd;
 
 	if (fb->tiling || fb->size || fb->strides[0] || igt_format_is_yuv(fb->drm_format)) {
@@ -570,11 +573,13 @@ static int create_bo_for_fb(struct igt_fb *fb)
 	igt_assert(fb->strides[0] == 0);
 
 	fb->size = calc_fb_size(fb);
+	for (plane = 0; plane < fb->num_planes; plane++)
+		bpp += DIV_ROUND_UP(fb->plane_bpp[plane],
+				    plane ? fmt->hsub * fmt->vsub : 1);
 
 	fb->is_dumb = true;
 	fb->gem_handle = kmstest_dumb_create(fd, fb->width, fb->height,
-					     fb->plane_bpp[0],
-					     &fb->strides[0], &fb->size);
+					     bpp, &fb->strides[0], &fb->size);
 
 	return fb->gem_handle;
 }
-- 
2.20.1