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,
+ 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
diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h
index e86925cf07b9..90b9bd9ecb83 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 long 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,
--
2.33.0
