[PATCH v2 20/25] drm/tegra: Compute dumb-buffer sizes with drm_mode_size_dumb()

[Thomas Zimmermann <tzimmermann@xxxxxxx>]

Call drm_mode_size_dumb() to compute dumb-buffer scanline pitch and
buffer size. Align the pitch according to hardware requirements.

Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Cc: Thierry Reding <thierry.reding@xxxxxxxxx>
Cc: Mikko Perttunen <mperttunen@xxxxxxxxxx>
---
 drivers/gpu/drm/tegra/gem.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index ace3e5a805cf..4d88e71192fb 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -16,6 +16,7 @@
 #include <linux/vmalloc.h>
 
 #include <drm/drm_drv.h>
+#include <drm/drm_dumb_buffers.h>
 #include <drm/drm_prime.h>
 #include <drm/tegra_drm.h>
 
@@ -543,12 +544,13 @@ void tegra_bo_free_object(struct drm_gem_object *gem)
 int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm,
                         struct drm_mode_create_dumb *args)
 {
-       unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
        struct tegra_drm *tegra = drm->dev_private;
        struct tegra_bo *bo;
+       int ret;
 
-       args->pitch = round_up(min_pitch, tegra->pitch_align);
-       args->size = args->pitch * args->height;
+       ret = drm_mode_size_dumb(drm, args, tegra->pitch_align, 0);
+       if (ret)
+               return ret;
 
        bo = tegra_bo_create_with_handle(file, drm, args->size, 0,
                                         &args->handle);
-- 
2.47.1