1 // SPDX-License-Identifier: GPL-2.0 or MIT
23 	return clip->y1 * pitch + clip->x1 * cpp;  in clip_offset()
27  * drm_fb_memcpy - Copy clip buffer
39 	unsigned int cpp = fb->format->cpp[0];  in drm_fb_memcpy()
40 	size_t len = (clip->x2 - clip->x1) * cpp;  in drm_fb_memcpy()
41 	unsigned int y, lines = clip->y2 - clip->y1;  in drm_fb_memcpy()
43 	vaddr += clip_offset(clip, fb->pitches[0], cpp);  in drm_fb_memcpy()
46 		vaddr += fb->pitches[0];  in drm_fb_memcpy()
53  * drm_fb_memcpy_dstclip - Copy clip buffer
67 	unsigned int cpp = fb->format->cpp[0];  in drm_fb_memcpy_dstclip()
69 	size_t len = (clip->x2 - clip->x1) * cpp;  in drm_fb_memcpy_dstclip()
70 	unsigned int y, lines = clip->y2 - clip->y1;  in drm_fb_memcpy_dstclip()
76 		vaddr += fb->pitches[0];  in drm_fb_memcpy_dstclip()
83  * drm_fb_swab - Swap bytes into clip buffer
88  * @cached: Source buffer is mapped cached (eg. not write-combined)
99 	u8 cpp = fb->format->cpp[0];  in drm_fb_swab()
112 	src += clip_offset(clip, fb->pitches[0], cpp);  in drm_fb_swab()
114 	for (y = clip->y1; y < clip->y2; y++) {  in drm_fb_swab()
124 		for (x = clip->x1; x < clip->x2; x++) {  in drm_fb_swab()
131 		src += fb->pitches[0];  in drm_fb_swab()
157  * drm_fb_xrgb8888_to_rgb565 - Convert XRGB8888 to RGB565 clip buffer
174 	size_t linepixels = clip->x2 - clip->x1;  in drm_fb_xrgb8888_to_rgb565()
177 	unsigned y, lines = clip->y2 - clip->y1;  in drm_fb_xrgb8888_to_rgb565()
181 	 * The cma memory is write-combined so reads are uncached.  in drm_fb_xrgb8888_to_rgb565()
188 	vaddr += clip_offset(clip, fb->pitches[0], sizeof(u32));  in drm_fb_xrgb8888_to_rgb565()
192 		vaddr += fb->pitches[0];  in drm_fb_xrgb8888_to_rgb565()
201  * drm_fb_xrgb8888_to_rgb565_dstclip - Convert XRGB8888 to RGB565 clip buffer
219 	size_t linepixels = clip->x2 - clip->x1;  in drm_fb_xrgb8888_to_rgb565_dstclip()
221 	unsigned y, lines = clip->y2 - clip->y1;  in drm_fb_xrgb8888_to_rgb565_dstclip()
228 	vaddr += clip_offset(clip, fb->pitches[0], sizeof(u32));  in drm_fb_xrgb8888_to_rgb565_dstclip()
233 		vaddr += fb->pitches[0];  in drm_fb_xrgb8888_to_rgb565_dstclip()
254  * drm_fb_xrgb8888_to_rgb888_dstclip - Convert XRGB8888 to RGB888 clip buffer
271 	size_t linepixels = clip->x2 - clip->x1;  in drm_fb_xrgb8888_to_rgb888_dstclip()
273 	unsigned y, lines = clip->y2 - clip->y1;  in drm_fb_xrgb8888_to_rgb888_dstclip()
280 	vaddr += clip_offset(clip, fb->pitches[0], sizeof(u32));  in drm_fb_xrgb8888_to_rgb888_dstclip()
285 		vaddr += fb->pitches[0];  in drm_fb_xrgb8888_to_rgb888_dstclip()
294  * drm_fb_xrgb8888_to_gray8 - Convert XRGB8888 to grayscale
295  * @dst: 8-bit grayscale destination buffer
307  * ITU BT.601 is used for the RGB -> luma (brightness) conversion.
312 	unsigned int len = (clip->x2 - clip->x1) * sizeof(u32);  in drm_fb_xrgb8888_to_gray8()
317 	if (WARN_ON(fb->format->format != DRM_FORMAT_XRGB8888))  in drm_fb_xrgb8888_to_gray8()
320 	 * The cma memory is write-combined so reads are uncached.  in drm_fb_xrgb8888_to_gray8()
327 	for (y = clip->y1; y < clip->y2; y++) {  in drm_fb_xrgb8888_to_gray8()
328 		src = vaddr + (y * fb->pitches[0]);  in drm_fb_xrgb8888_to_gray8()
329 		src += clip->x1;  in drm_fb_xrgb8888_to_gray8()
332 		for (x = clip->x1; x < clip->x2; x++) {  in drm_fb_xrgb8888_to_gray8()
333 			u8 r = (*src & 0x00ff0000) >> 16;  in drm_fb_xrgb8888_to_gray8()  local
337 			/* ITU BT.601: Y = 0.299 R + 0.587 G + 0.114 B */  in drm_fb_xrgb8888_to_gray8()
338 			*dst++ = (3 * r + 6 * g + b) / 10;  in drm_fb_xrgb8888_to_gray8()
348  * drm_fb_blit_rect_dstclip - Copy parts of a framebuffer to display memory
364  * -EINVAL if the color-format conversion failed, or
372 	uint32_t fb_format = fb->format->format;  in drm_fb_blit_rect_dstclip()
399 	return -EINVAL;  in drm_fb_blit_rect_dstclip()
404  * drm_fb_blit_dstclip - Copy framebuffer to display memory
426 		.x2 = fb->width,  in drm_fb_blit_dstclip()
428 		.y2 = fb->height,  in drm_fb_blit_dstclip()