[PATCH v3 18/25] drm/renesas/rz-du: Compute dumb-buffer sizes with drm_mode_size_dumb()

Thomas Zimmermann
2025-02-18T14:27:14Z

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: Biju Das <biju.das.jz@bp.renesas.com>
---
drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c
index 90c6269ccd29..f752369cd52f 100644
--- a/drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c
+++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_du_kms.c
@@ -75,10 +75,11 @@ const struct rzg2l_du_format_info *rzg2l_du_format_info(u32 fourcc)
int rzg2l_du_dumb_create(struct drm_file *file, struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
- unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
- unsigned int align = 16 * args->bpp / 8;
+ int ret;

- args->pitch = roundup(min_pitch, align);
+ ret = drm_mode_size_dumb(dev, args, 16 * args->bpp / 8, 0);
+ if (ret)
+ return ret;

return drm_gem_dma_dumb_create_internal(file, dev, args);
}
--
2.48.1