video/fbdev/udlfb.c

72 static int pixel_limit; /* Optionally force a pixel resolution limit */
421  * Rather than 256 pixel commands which are either rl or raw encoded,
426  * compression than 256 pixel raw or rle commands, with similar CPU consumpion.
438 	const uint16_t *pixel = *pixel_start_ptr;
442 	while ((pixel_end > pixel) &&
450 		    *pixel == *(u16 *)((u8 *)pixel + back_buffer_offset)) {
451 			pixel++;
464 		cmd_pixel_start = pixel;
467 		raw_pixel_start = pixel;
469 		cmd_pixel_end = pixel + min3(MAX_CMD_PIXELS + 1UL,
470 					(unsigned long)(pixel_end - pixel),
475 			while (cmd_pixel_end - 1 > pixel &&
480 		while (pixel < cmd_pixel_end) {
481 			const uint16_t * const repeating_pixel = pixel;
482 			u16 pixel_value = *pixel;
486 				*(u16 *)((u8 *)pixel + back_buffer_offset) = pixel_value;
488 			pixel++;
490 			if (unlikely((pixel < cmd_pixel_end) &&
491 				     (*pixel == pixel_value))) {
492 				/* go back and fill in raw pixel count */
498 						*(u16 *)((u8 *)pixel + back_buffer_offset) = pixel_value;
499 					pixel++;
500 				} while ((pixel < cmd_pixel_end) &&
501 					 (*pixel == pixel_value));
504 				*cmd++ = ((pixel - repeating_pixel) - 1) & 0xFF;
506 				/* Then start another raw pixel span */
507 				raw_pixel_start = pixel;
512 		if (pixel > raw_pixel_start) {
514 			*raw_pixels_count_byte = (pixel-raw_pixel_start) & 0xFF;
520 		*cmd_pixels_count_byte = (pixel - cmd_pixel_start) & 0xFF;
521 		dev_addr += (u8 *)pixel - (u8 *)cmd_pixel_start;
532 	*pixel_start_ptr = pixel;
537  * There are 3 copies of every pixel: The front buffer that the fbdev
1083 	*buf++ = 0x01; /* one pixel */
1571 					 "DL chip limited to %d pixel modes\n",