Hi Thomas,
Thank you for the patch.
On Fri, Jun 13, 2025 at 11:00:36AM +0200, Thomas Zimmermann wrote:
> 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 <tzimmerm...@suse.de>
> Cc: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> Cc: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
> ---
> drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
> b/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
> index 4c8fe83dd610..dd353fb858ef 100644
> --- a/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
> @@ -11,6 +11,7 @@
> #include <drm/drm_atomic_helper.h>
> #include <drm/drm_crtc.h>
> #include <drm/drm_device.h>
> +#include <drm/drm_dumb_buffers.h>
> #include <drm/drm_framebuffer.h>
> #include <drm/drm_gem_dma_helper.h>
> #include <drm/drm_gem_framebuffer_helper.h>
> @@ -407,8 +408,8 @@ int rcar_du_dumb_create(struct drm_file *file, struct
> drm_device *dev,
> struct drm_mode_create_dumb *args)
> {
> struct rcar_du_device *rcdu = to_rcar_du_device(dev);
> - unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
> unsigned int align;
> + int ret;
>
> /*
> * The R8A7779 DU requires a 16 pixels pitch alignment as documented,
> @@ -419,7 +420,9 @@ int rcar_du_dumb_create(struct drm_file *file, struct
> drm_device *dev,
> else
> align = 16 * args->bpp / 8;
>
> - args->pitch = roundup(min_pitch, align);
> + ret = drm_mode_size_dumb(dev, args, align, 0);
> + if (ret)
> + return ret;
>
> return drm_gem_dma_dumb_create_internal(file, dev, args);
> }
--
Regards,
Laurent Pinchart
