gpu/drm/drm_fb_helper.c

508  * A helper to alloc fb_info and the member cmap. Called by the driver
527 	ret = fb_alloc_cmap(&info->cmap, 256, 0);
546  * A helper to release fb_info and the member cmap.  Drivers do not
559 	if (info->cmap.len)
560 		fb_dealloc_cmap(&info->cmap);
801 static int setcmap_pseudo_palette(struct fb_cmap *cmap, struct fb_info *info)
806 	if (cmap->start + cmap->len > 16)
809 	for (i = 0; i < cmap->len; ++i) {
810 		u16 red = cmap->red[i];
811 		u16 green = cmap->green[i];
812 		u16 blue = cmap->blue[i];
827 		palette[cmap->start + i] = value;
833 static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info)
849 		if (cmap->start + cmap->len > crtc->gamma_size) {
858 		memcpy(r + cmap->start, cmap->red, cmap->len * sizeof(*r));
859 		memcpy(g + cmap->start, cmap->green, cmap->len * sizeof(*g));
860 		memcpy(b + cmap->start, cmap->blue, cmap->len * sizeof(*b));
874 						       struct fb_cmap *cmap)
882 	if (!size || cmap->start + cmap->len > size)
890 	if (cmap->start || cmap->len != size) {
895 		for (i = 0; i < cmap->start; i++) {
900 		for (i = cmap->start + cmap->len; i < size; i++) {
907 	for (i = 0; i < cmap->len; i++) {
908 		lut[cmap->start + i].red = cmap->red[i];
909 		lut[cmap->start + i].green = cmap->green[i];
910 		lut[cmap->start + i].blue = cmap->blue[i];
916 static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info)
944 			gamma_lut = setcmap_new_gamma_lut(crtc, cmap);
981 		memcpy(r + cmap->start, cmap->red, cmap->len * sizeof(*r));
982 		memcpy(g + cmap->start, cmap->green, cmap->len * sizeof(*g));
983 		memcpy(b + cmap->start, cmap->blue, cmap->len * sizeof(*b));
1006  * @cmap: cmap to set
1009 int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1027 		ret = setcmap_pseudo_palette(cmap, info);
1029 		ret = setcmap_atomic(cmap, info);
1031 		ret = setcmap_legacy(cmap, info);