1 // SPDX-License-Identifier: GPL-2.0 or MIT
12 #include <linux/iosys-map.h>
25 	return clip->y1 * pitch + clip->x1 * cpp;  in clip_offset()
29  * drm_fb_clip_offset - Returns the clipping rectangles byte-offset in a framebuffer
35  * The byte offset of the clip rectangle's top-left corner within the framebuffer.
40 	return clip_offset(clip, pitch, format->cpp[0]);  in drm_fb_clip_offset()
44 /* TODO: Make this function work with multi-plane formats. */
52 	size_t sbuf_len = linepixels * fb->format->cpp[0];  in __drm_fb_xfrm()
58 	 * Some source buffers, such as DMA memory, use write-combine  in __drm_fb_xfrm()
65 			return -ENOMEM;  in __drm_fb_xfrm()
70 	vaddr += clip_offset(clip, fb->pitches[0], fb->format->cpp[0]);  in __drm_fb_xfrm()
78 		vaddr += fb->pitches[0];  in __drm_fb_xfrm()
87 /* TODO: Make this function work with multi-plane formats. */
97 	size_t sbuf_len = linepixels * fb->format->cpp[0];  in __drm_fb_xfrm_toio()
110 		return -ENOMEM;  in __drm_fb_xfrm_toio()
114 	vaddr += clip_offset(clip, fb->pitches[0], fb->format->cpp[0]);  in __drm_fb_xfrm_toio()
123 		vaddr += fb->pitches[0];  in __drm_fb_xfrm_toio()
132 /* TODO: Make this function work with multi-plane formats. */
156  * drm_fb_memcpy - Copy clip buffer
171  * top-left corner).
181 	const struct drm_format_info *format = fb->format;  in drm_fb_memcpy()
187 	for (i = 0; i < format->num_planes; ++i) {  in drm_fb_memcpy()
198 		iosys_map_incr(&src_i, clip_offset(clip, fb->pitches[i], cpp_i));  in drm_fb_memcpy()
202 			iosys_map_incr(&src_i, fb->pitches[i]);  in drm_fb_memcpy()
230  * drm_fb_swab - Swap bytes into clip buffer
237  * @cached: Source buffer is mapped cached (eg. not write-combined)
239  * This function copies parts of a framebuffer to display memory and swaps per-pixel
248  * top-left corner).
254 	const struct drm_format_info *format = fb->format;  in drm_fb_swab()
266 		drm_warn_once(fb->dev, "Format %p4cc has unsupported pixel size.\n",  in drm_fb_swab()
267 			      &format->format);  in drm_fb_swab()
291  * drm_fb_xrgb8888_to_rgb332 - Convert XRGB8888 to RGB332 clip buffer
306  * top-left corner).
359  * drm_fb_xrgb8888_to_rgb565 - Convert XRGB8888 to RGB565 clip buffer
375  * top-left corner).
414  * drm_fb_xrgb8888_to_rgb888 - Convert XRGB8888 to RGB888 clip buffer
429  * top-left corner).
485 		u8 r = *sbuf8++;  in drm_fb_rgb888_to_xrgb8888_line()  local
488 		u32 pix = 0xff000000 | (r << 16) | (g << 8) | b;  in drm_fb_rgb888_to_xrgb8888_line()
525  * drm_fb_xrgb8888_to_xrgb2101010 - Convert XRGB8888 to XRGB2101010 clip buffer
540  * top-left corner).
566 		u8 r = (pix & 0x00ff0000) >> 16;  in drm_fb_xrgb8888_to_gray8_line()  local
570 		/* ITU BT.601: Y = 0.299 R + 0.587 G + 0.114 B */  in drm_fb_xrgb8888_to_gray8_line()
571 		*dbuf8++ = (3 * r + 6 * g + b) / 10;  in drm_fb_xrgb8888_to_gray8_line()
576  * drm_fb_xrgb8888_to_gray8 - Convert XRGB8888 to grayscale
577  * @dst: Array of 8-bit grayscale destination buffers
591  * top-left corner).
598  * ITU BT.601 is being used for the RGB -> luma (brightness) conversion.
614  * drm_fb_blit - Copy parts of a framebuffer to display memory
615  * @dst:	Array of display-memory addresses to copy to
631  * top-left corner).
635  * -EINVAL if the color-format conversion failed, or
642 	uint32_t fb_format = fb->format->format;  in drm_fb_blit()
683 	drm_warn_once(fb->dev, "No conversion helper from %p4cc to %p4cc found.\n",  in drm_fb_blit()
686 	return -EINVAL;  in drm_fb_blit()
699 		for (i = 0; i < bits; i++, pixels--) {  in drm_fb_gray8_to_mono_line()
708  * drm_fb_xrgb8888_to_mono - Convert XRGB8888 to monochrome
723  * top-left corner). The first pixel (upper left corner of the clip rectangle) will
726  * be located at an x-coordinate that is a multiple of 8, then the caller must take
746 	unsigned int cpp = fb->format->cpp[0];  in drm_fb_xrgb8888_to_mono()
748 	struct drm_device *dev = fb->dev;  in drm_fb_xrgb8888_to_mono()
755 	if (drm_WARN_ON(dev, fb->format->format != DRM_FORMAT_XRGB8888))  in drm_fb_xrgb8888_to_mono()
769 	 * The dma memory is write-combined so reads are uncached.  in drm_fb_xrgb8888_to_mono()
773 	 * line-by-line but are converted to 8-bit grayscale as an  in drm_fb_xrgb8888_to_mono()
785 	vaddr += clip_offset(clip, fb->pitches[0], cpp);  in drm_fb_xrgb8888_to_mono()
790 		vaddr += fb->pitches[0];  in drm_fb_xrgb8888_to_mono()
843  * drm_fb_build_fourcc_list - Filters a list of supported color formats against
848  * @driver_fourccs: 4CC codes of all driver-supported color formats
867  * The number of color-formats 4CC codes returned in @fourccs_out.
886 		if (is_listed_fourcc(fourccs_out, fourccs - fourccs_out, fourcc)) {  in drm_fb_build_fourcc_list()
914 		if (is_listed_fourcc(fourccs_out, fourccs - fourccs_out, fourcc)) {  in drm_fb_build_fourcc_list()
930 	return fourccs - fourccs_out;  in drm_fb_build_fourcc_list()