Den 22.10.2021 15.28, skrev Thomas Zimmermann: > Provide a function that computes the offset into a blit destination > buffer. This will allow to move destination-buffer clipping into the > format-helper callers. > > Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> > --- > drivers/gpu/drm/drm_format_helper.c | 10 ++++++++-- > include/drm/drm_format_helper.h | 4 ++++ > 2 files changed, 12 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c > index 69fde60e36b3..28e9d0d89270 100644 > --- a/drivers/gpu/drm/drm_format_helper.c > +++ b/drivers/gpu/drm/drm_format_helper.c > @@ -17,12 +17,18 @@ > #include <drm/drm_fourcc.h> > #include <drm/drm_rect.h> > > -static unsigned int clip_offset(struct drm_rect *clip, > - unsigned int pitch, unsigned int cpp) > +static unsigned int clip_offset(const struct drm_rect *clip, unsigned int pitch, unsigned int cpp) > { > return clip->y1 * pitch + clip->x1 * cpp; > } > > +unsigned long drm_fb_clip_offset(unsigned int pitch, const struct drm_format_info *format, Like Sam I wonder about the unsigned long here. Noralf. > + const struct drm_rect *clip) > +{ > + return clip_offset(clip, pitch, format->cpp[0]); > +} > +EXPORT_SYMBOL(drm_fb_clip_offset); > +