[igt-dev] [PATCH i-g-t v3 07/14] igt: fb: Account for all planes bpp

[Maxime Ripard <maxime.ripard@bootlin.com>]

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.

Signed-off-by: Maxime Ripard <maxime.ripard@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 0f4021b77e5f..0f043acce29d 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -528,7 +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);
 	uint64_t size = calc_fb_size(fb);
+	unsigned int plane, bpp;
 	int fd = fb->fd;
 
 	/* respect the size requested by the caller */
@@ -557,10 +559,13 @@ static int create_bo_for_fb(struct igt_fb *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

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