Like drm_fb_xrgb8888_to_rgb565() but converts to 24bpp (DRM_FORMAT_RGB888).
Signed-off-by: Gerd Hoffmann kraxel@redhat.com --- include/drm/drm_fb_helper.h | 4 +++ drivers/gpu/drm/drm_fb_helper.c | 49 +++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+)
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index 1406057e1a93..a6e56fcd948e 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -648,5 +648,9 @@ void drm_fb_xrgb8888_to_rgb565(u16 *dst, void *vaddr, struct drm_framebuffer *fb, struct drm_rect *clip, bool swap, bool dstclip); +void drm_fb_xrgb8888_to_rgb888(u8 *dst, void *vaddr, + struct drm_framebuffer *fb, + struct drm_rect *clip, + bool dstclip);
#endif diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 2c9286702c3f..6ef0ad4f40b1 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -3431,3 +3431,52 @@ void drm_fb_xrgb8888_to_rgb565(u16 *dst, void *vaddr, kfree(buf); } EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565); + +/** + * drm_fb_xrgb8888_to_rgb888 - Convert XRGB8888 to RGB888 clip buffer + * @dst: RGB565 destination buffer + * @vaddr: XRGB8888 source buffer + * @fb: DRM framebuffer + * @clip: Clip rectangle area to copy + * @dstclip: Clip destination too. + * + * Drivers can use this function for RGB888 devices that don't natively + * support XRGB8888. + */ +void drm_fb_xrgb8888_to_rgb888(u8 *dst, void *vaddr, + struct drm_framebuffer *fb, + struct drm_rect *clip, + bool dstclip) +{ + size_t len = (clip->x2 - clip->x1) * sizeof(u32); + unsigned int x, y; + u32 *src, *buf; + u8 red, green, blue; + + buf = kmalloc(len, GFP_KERNEL); + if (!buf) + return; + + if (dstclip) + dst += (clip->y1 * fb->width + clip->x1) * 3; + for (y = clip->y1; y < clip->y2; y++) { + src = vaddr + (y * fb->pitches[0]); + src += clip->x1; + memcpy(buf, src, len); + src = buf; + for (x = clip->x1; x < clip->x2; x++) { + red = (*src & 0x00FF0000) >> 16; + green = (*src & 0x0000FF00) >> 8; + blue = (*src & 0x000000FF) >> 0; + src++; + *dst++ = blue; + *dst++ = green; + *dst++ = red; + } + if (dstclip) + dst += (fb->width - (clip->x2 - clip->x1)) * 3; + } + + kfree(buf); +} +EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888);