drm/exynos/fbdev: set smem_len for fbdev
authorDaniel Kurtz <djkurtz@chromium.org>
Mon, 1 Sep 2014 12:28:00 +0000 (21:28 +0900)
committerInki Dae <daeinki@gmail.com>
Fri, 19 Sep 2014 15:56:09 +0000 (00:56 +0900)
commit71b1f1956b4466b47551e73d4dd2145df4241eb8
tree941e434ae5a545d0d868b4c4eca136da5e4065dc
parent025d8e1348c1f421684f15b06f0a080787a0f9db
drm/exynos/fbdev: set smem_len for fbdev

Commit [0] stopped setting fix.smem_start and fix.smem_len when creating
the fbdev.

[0] 2f1eab8d8ab59e799f7d51d62410b398607a7bc3
  drm/exynos/fbdev: don't set fix.smem/mmio_{start,len}

However, smem_len is used by some userland applications to calculate the
size for mmap.  In particular, it is used by xf86-video-fbdev:

http://cgit.freedesktop.org/xorg/xserver/tree/hw/xfree86/fbdevhw/fbdevhw.c?id=xorg-server-1.15.99.903#n571

So, let's restore setting the smem_len to unbreak things for these users.

Note: we are still leaving smem_start set to 0.

Reported-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Reported-by: Gunther Noack <me@guenthernoack.de>
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
drivers/gpu/drm/exynos/exynos_drm_fbdev.c