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| author | Thomas Zimmermann <tzimmermann@suse.de> | 2021-11-10 11:36:54 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2021-11-11 12:06:57 +0100 |
| commit | 452290f354f04fca53cba810bd241f4307502f1e (patch) | |
| tree | ab62669fb391955b49bf52a083d9318dfa5b772f | |
| parent | 396d9b9a48723995416a05f0dab80c1dd6c21e80 (diff) | |
| download | linux-452290f354f04fca53cba810bd241f4307502f1e.tar.gz | |
drm/format-helper: Export drm_fb_clip_offset()
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. v4: * add missing '@' for parameter documentation * fix typo 'frambuffer' v2: * provide documentation (Sam) * return 'unsigned int' (Sam, Noralf) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/20211110103702.374-2-tzimmermann@suse.de
| -rw-r--r-- | drivers/gpu/drm/drm_format_helper.c | 19 | ||||
| -rw-r--r-- | include/drm/drm_format_helper.h | 4 |
2 files changed, 21 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index 69fde60e36b3..9d2a4c27689b 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -17,13 +17,28 @@ #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; } /** + * drm_fb_clip_offset - Returns the clipping rectangles byte-offset in a framebuffer + * @pitch: Framebuffer line pitch in byte + * @format: Framebuffer format + * @clip: Clip rectangle + * + * Returns: + * The byte offset of the clip rectangle's top-left corner within the framebuffer. + */ +unsigned int drm_fb_clip_offset(unsigned int pitch, const struct drm_format_info *format, + const struct drm_rect *clip) +{ + return clip_offset(clip, pitch, format->cpp[0]); +} +EXPORT_SYMBOL(drm_fb_clip_offset); + +/** * drm_fb_memcpy - Copy clip buffer * @dst: Destination buffer * @vaddr: Source buffer diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h index e86925cf07b9..f5a8b334b18d 100644 --- a/include/drm/drm_format_helper.h +++ b/include/drm/drm_format_helper.h @@ -6,9 +6,13 @@ #ifndef __LINUX_DRM_FORMAT_HELPER_H #define __LINUX_DRM_FORMAT_HELPER_H +struct drm_format_info; struct drm_framebuffer; struct drm_rect; +unsigned int drm_fb_clip_offset(unsigned int pitch, const struct drm_format_info *format, + const struct drm_rect *clip); + void drm_fb_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb, struct drm_rect *clip); void drm_fb_memcpy_dstclip(void __iomem *dst, unsigned int dst_pitch, void *vaddr, |