diff options
| -rw-r--r-- | drivers/gpu/drm/drm_format_helper.c | 87 | ||||
| -rw-r--r-- | include/drm/drm_format_helper.h | 8 |
2 files changed, 95 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index 8d5a683afea7..0e885cd34107 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -344,3 +344,90 @@ void drm_fb_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb, } EXPORT_SYMBOL(drm_fb_xrgb8888_to_gray8); +/** + * drm_fb_blit_rect_dstclip - Copy parts of a framebuffer to display memory + * @dst: The display memory to copy to + * @dst_pitch: Number of bytes between two consecutive scanlines within dst + * @dst_format: FOURCC code of the display's color format + * @vmap: The framebuffer memory to copy from + * @fb: The framebuffer to copy from + * @clip: Clip rectangle area to copy + * + * This function copies parts of a framebuffer to display memory. If the + * formats of the display and the framebuffer mismatch, the blit function + * will attempt to convert between them. + * + * Use drm_fb_blit_dstclip() to copy the full framebuffer. + * + * Returns: + * 0 on success, or + * -EINVAL if the color-format conversion failed, or + * a negative error code otherwise. + */ +int drm_fb_blit_rect_dstclip(void __iomem *dst, unsigned int dst_pitch, + uint32_t dst_format, void *vmap, + struct drm_framebuffer *fb, + struct drm_rect *clip) +{ + uint32_t fb_format = fb->format->format; + + /* treat alpha channel like filler bits */ + if (fb_format == DRM_FORMAT_ARGB8888) + fb_format = DRM_FORMAT_XRGB8888; + if (dst_format == DRM_FORMAT_ARGB8888) + dst_format = DRM_FORMAT_XRGB8888; + + if (dst_format == fb_format) { + drm_fb_memcpy_dstclip(dst, dst_pitch, vmap, fb, clip); + return 0; + + } else if (dst_format == DRM_FORMAT_RGB565) { + if (fb_format == DRM_FORMAT_XRGB8888) { + drm_fb_xrgb8888_to_rgb565_dstclip(dst, dst_pitch, + vmap, fb, clip, + false); + return 0; + } + } else if (dst_format == DRM_FORMAT_RGB888) { + if (fb_format == DRM_FORMAT_XRGB8888) { + drm_fb_xrgb8888_to_rgb888_dstclip(dst, dst_pitch, + vmap, fb, clip); + return 0; + } + } + + return -EINVAL; +} +EXPORT_SYMBOL(drm_fb_blit_rect_dstclip); + +/** + * drm_fb_blit_dstclip - Copy framebuffer to display memory + * @dst: The display memory to copy to + * @dst_pitch: Number of bytes between two consecutive scanlines within dst + * @dst_format: FOURCC code of the display's color format + * @vmap: The framebuffer memory to copy from + * @fb: The framebuffer to copy from + * + * This function copies a full framebuffer to display memory. If the formats + * of the display and the framebuffer mismatch, the copy function will + * attempt to convert between them. + * + * See drm_fb_blit_rect_dstclip() for more inforamtion. + * + * Returns: + * 0 on success, or a negative error code otherwise. + */ +int drm_fb_blit_dstclip(void __iomem *dst, unsigned int dst_pitch, + uint32_t dst_format, void *vmap, + struct drm_framebuffer *fb) +{ + struct drm_rect fullscreen = { + .x1 = 0, + .x2 = fb->width, + .y1 = 0, + .y2 = fb->height, + }; + return drm_fb_blit_rect_dstclip(dst, dst_pitch, dst_format, vmap, fb, + &fullscreen); +} +EXPORT_SYMBOL(drm_fb_blit_dstclip); diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h index 2b5036a5fbe7..4e0258a61311 100644 --- a/include/drm/drm_format_helper.h +++ b/include/drm/drm_format_helper.h @@ -28,4 +28,12 @@ void drm_fb_xrgb8888_to_rgb888_dstclip(void __iomem *dst, unsigned int dst_pitch void drm_fb_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb, struct drm_rect *clip); +int drm_fb_blit_rect_dstclip(void __iomem *dst, unsigned int dst_pitch, + uint32_t dst_format, void *vmap, + struct drm_framebuffer *fb, + struct drm_rect *rect); +int drm_fb_blit_dstclip(void __iomem *dst, unsigned int dst_pitch, + uint32_t dst_format, void *vmap, + struct drm_framebuffer *fb); + #endif /* __LINUX_DRM_FORMAT_HELPER_H */ |