drm: add drm_fb_memcpy_dstclip() helper

It is a drm_fb_memcpy() variant which checks the clip rectangle for the
destination too.

Common code between drm_fb_memcpy() and drm_fb_memcpy_dstclip() was
factored out into the drm_fb_memcpy_lines() helper function.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20190405095219.9231-3-kraxel@redhat.com

1 files changed, 2 insertions, 0 deletions

diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h
index 5a7ada6b0bef..c52b7b9a25f0 100644
--- a/include/drm/drm_format_helper.h
+++ b/include/drm/drm_format_helper.h
@@ -15,6 +15,8 @@ struct drm_rect;
 
 void drm_fb_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
                    struct drm_rect *clip);
+void drm_fb_memcpy_dstclip(void *dst, void *vaddr, struct drm_framebuffer *fb,
+                           struct drm_rect *clip);
 void drm_fb_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb,
                    struct drm_rect *clip);
 void drm_fb_xrgb8888_to_rgb565(u16 *dst, void *vaddr,