[PATCH v3 20/25] drm/tegra: Compute dumb-buffer sizes with drm_mode_size_dumb()

Thomas Zimmermann
2025-02-18T14:27:23Z

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@suse.de>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Mikko Perttunen <mperttunen@nvidia.com>
---
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);