video/fbdev/atmel_lcdfb.c

294 			       struct fb_var_screeninfo *var)
300 	dma_addr = (fix->smem_start + var->yoffset * fix->line_length
301 		    + var->xoffset * info->var.bits_per_pixel / 8);
327 	struct fb_var_screeninfo *var = &info->var;
330 	smem_len = (var->xres_virtual * var->yres_virtual
331 		    * ((var->bits_per_pixel + 7) / 8));
347 static const struct fb_videomode *atmel_lcdfb_choose_mode(struct fb_var_screeninfo *var,
353 	fb_var_to_videomode(&varfbmode, var);
356 		fb_videomode_to_var(var, fbmode);
362  *      atmel_lcdfb_check_var - Validates a var passed in.
363  *      @var: frame buffer variable screen structure
367  *	var passed in. This function does not alter the hardware
369  *	struct atmel_lcdfb_info do not change. This includes the var
373  *	this. If the var passed in is slightly off by what the
374  *	hardware can support then we alter the var PASSED in to what
379  *	needed. In this case the driver would just provide a var that
384 static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
396 	if (!(var->pixclock && var->bits_per_pixel)) {
398 		if (!atmel_lcdfb_choose_mode(var, info)) {
404 	dev_dbg(dev, "  resolution: %ux%u\n", var->xres, var->yres);
405 	dev_dbg(dev, "  pixclk:     %lu KHz\n", PICOS2KHZ(var->pixclock));
406 	dev_dbg(dev, "  bpp:        %u\n", var->bits_per_pixel);
409 	if (PICOS2KHZ(var->pixclock) > clk_value_khz) {
410 		dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock));
415 	if (var->xres > var->xres_virtual)
416 		var->xres_virtual = var->xres;
418 	if (var->yres > var->yres_virtual)
419 		var->yres_virtual = var->yres;
422 	var->xres = (var->xres + 3) & ~3UL;
423 	var->xres_virtual = (var->xres_virtual + 3) & ~3UL;
425 	var->red.msb_right = var->green.msb_right = var->blue.msb_right = 0;
426 	var->transp.msb_right = 0;
427 	var->transp.offset = var->transp.length = 0;
428 	var->xoffset = var->yoffset = 0;
431 		unsigned int smem_len = (var->xres_virtual * var->yres_virtual
432 					 * ((var->bits_per_pixel + 7) / 8));
441 	var->vsync_len = min_t(u32, var->vsync_len,
443 	var->upper_margin = min_t(u32, var->upper_margin,
445 	var->lower_margin = min_t(u32, var->lower_margin,
447 	var->right_margin = min_t(u32, var->right_margin,
449 	var->hsync_len = min_t(u32, var->hsync_len,
451 	var->left_margin = min_t(u32, var->left_margin,
455 	var->vsync_len = max_t(u32, var->vsync_len, 1);
456 	var->right_margin = max_t(u32, var->right_margin, 1);
457 	var->hsync_len = max_t(u32, var->hsync_len, 1);
458 	var->left_margin = max_t(u32, var->left_margin, 1);
460 	switch (var->bits_per_pixel) {
465 		var->red.offset = var->green.offset = var->blue.offset = 0;
466 		var->red.length = var->green.length = var->blue.length
467 			= var->bits_per_pixel;
472 			var->green.length = 5;
474 			var->green.length = 6;
478 			var->red.offset = var->green.length + 5;
479 			var->blue.offset = 0;
482 			var->red.offset = 0;
483 			var->blue.offset = var->green.length + 5;
485 		var->green.offset = 5;
486 		var->red.length = var->blue.length = 5;
489 		var->transp.offset = 24;
490 		var->transp.length = 8;
495 			var->red.offset = 16;
496 			var->blue.offset = 0;
499 			var->red.offset = 0;
500 			var->blue.offset = 16;
502 		var->green.offset = 8;
503 		var->red.length = var->green.length = var->blue.length = 8;
507 					var->bits_per_pixel);
532  *	not alter var in fb_info since we are using that data. This
533  *	means we depend on the data in var inside fb_info to be
553 		 info->var.xres, info->var.yres,
554 		 info->var.xres_virtual, info->var.yres_virtual);
558 	if (info->var.bits_per_pixel == 1)
560 	else if (info->var.bits_per_pixel <= 8)
565 	bits_per_line = info->var.xres_virtual * info->var.bits_per_pixel;
570 	atmel_lcdfb_update_dma(info, &info->var);
573 	value = (info->var.yres * info->var.xres * info->var.bits_per_pixel) / 32;
585 	value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock));
596 		info->var.pixclock =
599 					PICOS2KHZ(info->var.pixclock));
606 	if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
608 	if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
611 	switch (info->var.bits_per_pixel) {
626 	value = (info->var.vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET;
627 	value |= info->var.upper_margin << ATMEL_LCDC_VBP_OFFSET;
628 	value |= info->var.lower_margin;
633 	value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET;
634 	value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET;
635 	value |= (info->var.left_margin - 1);
640 	hozval_linesz = compute_hozval(sinfo, info->var.xres);
644 	value |= info->var.yres - 1;
713 	if (info->var.grayscale)
722 			val  = chan_to_field(red, &info->var.red);
723 			val |= chan_to_field(green, &info->var.green);
724 			val |= chan_to_field(blue, &info->var.blue);
774 static int atmel_lcdfb_pan_display(struct fb_var_screeninfo *var,
779 	atmel_lcdfb_update_dma(info, var);
849 	info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
922 	struct fb_var_screeninfo *var = &info->var;
943 	ret = of_property_read_u32(display_np, "bits-per-pixel", &var->bits_per_pixel);
1083 	fb_videomode_to_var(&info->var, &modelist->mode);
1085 	atmel_lcdfb_check_var(&info->var, info);