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Subject[PATCH v2 4/6] drm: add dstclip parameter to drm_fb_xrgb8888_to_rgb565()
Date
When set apply clipping logic to destination too.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
include/drm/drm_fb_helper.h | 3 ++-
drivers/gpu/drm/drm_fb_helper.c | 8 +++++++-
drivers/gpu/drm/tinydrm/mipi-dbi.c | 2 +-
3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index 0350c7e9d6ba..1406057e1a93 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -646,6 +646,7 @@ void drm_fb_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
struct drm_rect *clip, bool dstclip);
void drm_fb_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
struct drm_framebuffer *fb,
- struct drm_rect *clip, bool swap);
+ struct drm_rect *clip,
+ bool swap, bool dstclip);

#endif
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 087e49741094..2c9286702c3f 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -3388,13 +3388,15 @@ EXPORT_SYMBOL(drm_fb_memcpy);
* @fb: DRM framebuffer
* @clip: Clip rectangle area to copy
* @swap: Swap bytes
+ * @dstclip: Clip destination too.
*
* Drivers can use this function for RGB565 devices that don't natively
* support XRGB8888.
*/
void drm_fb_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
struct drm_framebuffer *fb,
- struct drm_rect *clip, bool swap)
+ struct drm_rect *clip,
+ bool swap, bool dstclip)
{
size_t len = (clip->x2 - clip->x1) * sizeof(u32);
unsigned int x, y;
@@ -3405,6 +3407,8 @@ void drm_fb_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
if (!buf)
return;

+ if (dstclip)
+ dst += clip->y1 * fb->width + clip->x1;
for (y = clip->y1; y < clip->y2; y++) {
src = vaddr + (y * fb->pitches[0]);
src += clip->x1;
@@ -3420,6 +3424,8 @@ void drm_fb_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
else
*dst++ = val16;
}
+ if (dstclip)
+ dst += fb->width - (clip->x2 - clip->x1);
}

kfree(buf);
diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c
index cf8df5fb7494..b2d74f8707db 100644
--- a/drivers/gpu/drm/tinydrm/mipi-dbi.c
+++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c
@@ -224,7 +224,7 @@ int mipi_dbi_buf_copy(void *dst, struct drm_framebuffer *fb,
drm_fb_memcpy(dst, src, fb, clip, false);
break;
case DRM_FORMAT_XRGB8888:
- drm_fb_xrgb8888_to_rgb565(dst, src, fb, clip, swap);
+ drm_fb_xrgb8888_to_rgb565(dst, src, fb, clip, swap, false);
break;
default:
dev_err_once(fb->dev->dev, "Format is not supported: %s\n",
--
2.18.1
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