diff options
| -rw-r--r-- | lib/igt_fb.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/lib/igt_fb.c b/lib/igt_fb.c index 1b9131f2..780283a0 100644 --- a/lib/igt_fb.c +++ b/lib/igt_fb.c @@ -4437,15 +4437,19 @@ int igt_fb_get_fnv1a_crc(struct igt_fb *fb, igt_crc_t *crc) { const uint32_t FNV1a_OFFSET_BIAS = 2166136261; const uint32_t FNV1a_PRIME = 16777619; + uint32_t *line = NULL; uint32_t hash; void *map; - char *ptr, *line = NULL; + char *ptr; int x, y, cpp = igt_drm_format_to_bpp(fb->drm_format) / 8; uint32_t stride = calc_plane_stride(fb, 0); if (fb->num_planes != 1) return -EINVAL; + if (fb->drm_format != DRM_FORMAT_XRGB8888) + return -EINVAL; + ptr = igt_fb_map_buffer(fb->fd, fb); igt_assert(ptr); map = ptr; @@ -4467,9 +4471,17 @@ int igt_fb_get_fnv1a_crc(struct igt_fb *fb, igt_crc_t *crc) igt_memcpy_from_wc(line, ptr, fb->width * cpp); - for (x = 0; x < fb->width * cpp; x++) { - hash ^= line[x]; - hash *= FNV1a_PRIME; + for (x = 0; x < fb->width; x++) { + unsigned int i; + uint32_t pixel = le32_to_cpu(line[x]); + pixel &= 0x00ffffff; + + for (i = 0; i < sizeof(pixel); i++) { + uint8_t component = (pixel >> (i * 8)) & 0xff; + + hash ^= component; + hash *= FNV1a_PRIME; + } } } |