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drm/format-helper: Rework format-helper memcpy functions

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Move destination-buffer clipping from all format-helper memcpy
function into callers. Support destination-buffer pitch. Only
distinguish between system and I/O memory, but use same logic
everywhere.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: Noralf Trønnes <noralf@tronnes.org>
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211110103702.374-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2021-11-10 11:36:55 +01:00
parent 452290f354
commit 27bd66dd64
7 changed files with 41 additions and 30 deletions
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35
drivers/gpu/drm/drm_format_helper.c
View File

@@ -41,58 +41,62 @@ EXPORT_SYMBOL(drm_fb_clip_offset);
/**
* drm_fb_memcpy - Copy clip buffer
* @dst: Destination buffer
* @dst_pitch: Number of bytes between two consecutive scanlines within dst
* @vaddr: Source buffer
* @fb: DRM framebuffer
* @clip: Clip rectangle area to copy
*
* This function does not apply clipping on dst, i.e. the destination
* is a small buffer containing the clip rect only.
* is at the top-left corner.
*/
void drm_fb_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip)
void drm_fb_memcpy(void *dst, unsigned int dst_pitch, const void *vaddr,
const struct drm_framebuffer *fb, const struct drm_rect *clip)
{
unsigned int cpp = fb->format->cpp[0];
size_t len = (clip->x2 - clip->x1) * cpp;
unsigned int y, lines = clip->y2 - clip->y1;
if (!dst_pitch)
dst_pitch = len;
vaddr += clip_offset(clip, fb->pitches[0], cpp);
for (y = 0; y < lines; y++) {
memcpy(dst, vaddr, len);
vaddr += fb->pitches[0];
dst += len;
dst += dst_pitch;
}
}
EXPORT_SYMBOL(drm_fb_memcpy);
/**
* drm_fb_memcpy_dstclip - Copy clip buffer
* drm_fb_memcpy_toio - Copy clip buffer
* @dst: Destination buffer (iomem)
* @dst_pitch: Number of bytes between two consecutive scanlines within dst
* @vaddr: Source buffer
* @fb: DRM framebuffer
* @clip: Clip rectangle area to copy
*
* This function applies clipping on dst, i.e. the destination is a
* full (iomem) framebuffer but only the clip rect content is copied over.
* This function does not apply clipping on dst, i.e. the destination
* is at the top-left corner.
*/
void drm_fb_memcpy_dstclip(void __iomem *dst, unsigned int dst_pitch,
void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip)
void drm_fb_memcpy_toio(void __iomem *dst, unsigned int dst_pitch, const void *vaddr,
const struct drm_framebuffer *fb, const struct drm_rect *clip)
{
unsigned int cpp = fb->format->cpp[0];
unsigned int offset = clip_offset(clip, dst_pitch, cpp);
size_t len = (clip->x2 - clip->x1) * cpp;
unsigned int y, lines = clip->y2 - clip->y1;
vaddr += offset;
dst += offset;
if (!dst_pitch)
dst_pitch = len;
vaddr += clip_offset(clip, fb->pitches[0], cpp);
for (y = 0; y < lines; y++) {
memcpy_toio(dst, vaddr, len);
vaddr += fb->pitches[0];
dst += dst_pitch;
}
}
EXPORT_SYMBOL(drm_fb_memcpy_dstclip);
EXPORT_SYMBOL(drm_fb_memcpy_toio);
/**
* drm_fb_swab - Swap bytes into clip buffer
@@ -481,7 +485,8 @@ int drm_fb_blit_rect_dstclip(void __iomem *dst, unsigned int dst_pitch,
dst_format = DRM_FORMAT_XRGB8888;
if (dst_format == fb_format) {
drm_fb_memcpy_dstclip(dst, dst_pitch, vmap, fb, clip);
dst += clip_offset(clip, dst_pitch, fb->format->cpp[0]);
drm_fb_memcpy_toio(dst, dst_pitch, vmap, fb, clip);
return 0;
} else if (dst_format == DRM_FORMAT_RGB565) {