video/fbdev/imxfb.c

267 static int imxfb_activate_var(struct fb_var_screeninfo *var,
318 	if (info->var.grayscale)
331 			val  = chan_to_field(red, &info->var.red);
332 			val |= chan_to_field(green, &info->var.green);
333 			val |= chan_to_field(blue, &info->var.blue);
370 static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
379 	if (var->xres < MIN_XRES)
380 		var->xres = MIN_XRES;
381 	if (var->yres < MIN_YRES)
382 		var->yres = MIN_YRES;
388 	var->xres		= imxfb_mode->mode.xres;
389 	var->yres		= imxfb_mode->mode.yres;
390 	var->bits_per_pixel	= imxfb_mode->bpp;
391 	var->pixclock		= imxfb_mode->mode.pixclock;
392 	var->hsync_len		= imxfb_mode->mode.hsync_len;
393 	var->left_margin	= imxfb_mode->mode.left_margin;
394 	var->right_margin	= imxfb_mode->mode.right_margin;
395 	var->vsync_len		= imxfb_mode->mode.vsync_len;
396 	var->upper_margin	= imxfb_mode->mode.upper_margin;
397 	var->lower_margin	= imxfb_mode->mode.lower_margin;
398 	var->sync		= imxfb_mode->mode.sync;
399 	var->xres_virtual	= max(var->xres_virtual, var->xres);
400 	var->yres_virtual	= max(var->yres_virtual, var->yres);
402 	pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
406 	tmp = var->pixclock * (unsigned long long)lcd_clk;
421 	switch (var->bits_per_pixel) {
465 	var->red    = rgb->red;
466 	var->green  = rgb->green;
467 	var->blue   = rgb->blue;
468 	var->transp = rgb->transp;
471 		var->red.length, var->green.length, var->blue.length,
472 		var->transp.length);
475 		var->red.offset, var->green.offset, var->blue.offset,
476 		var->transp.offset);
488 	struct fb_var_screeninfo *var = &info->var;
490 	if (var->bits_per_pixel == 16 || var->bits_per_pixel == 32)
503 	info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
504 	fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
506 	imxfb_activate_var(var, info);
606  *	Configures LCD Controller based on entries in var parameter.  Settings are
609 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
615 	pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
616 		var->xres, var->hsync_len,
617 		var->left_margin, var->right_margin);
618 	pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
619 		var->yres, var->vsync_len,
620 		var->upper_margin, var->lower_margin);
630 	if (var->xres < 16        || var->xres > 1024)
632 			info->fix.id, var->xres);
633 	if (var->hsync_len < 1    || var->hsync_len > 64)
635 			info->fix.id, var->hsync_len);
636 	if (var->left_margin < left_margin_low  || var->left_margin > 255)
638 			info->fix.id, var->left_margin);
639 	if (var->right_margin < 1 || var->right_margin > 255)
641 			info->fix.id, var->right_margin);
642 	if (var->yres < 1 || var->yres > ymax_mask)
644 			info->fix.id, var->yres);
645 	if (var->vsync_len > 100)
647 			info->fix.id, var->vsync_len);
648 	if (var->upper_margin > 63)
650 			info->fix.id, var->upper_margin);
651 	if (var->lower_margin > 255)
653 			info->fix.id, var->lower_margin);
658 			  var->xres * var->bits_per_pixel / 8 / 4),
661 	writel(FIELD_PREP(HCR_H_WIDTH_MASK, var->hsync_len - 1) |
662 	       FIELD_PREP(HCR_H_WAIT_1_MASK, var->right_margin - 1) |
664 			  var->left_margin - left_margin_low),
667 	writel(FIELD_PREP(VCR_V_WIDTH_MASK, var->vsync_len) |
668 	       FIELD_PREP(VCR_V_WAIT_1_MASK, var->lower_margin) |
669 	       FIELD_PREP(VCR_V_WAIT_2_MASK, var->upper_margin),
672 	writel(FIELD_PREP(SIZE_XMAX_MASK, var->xres >> 4) |
673 	       (var->yres & ymax_mask),
716 	info->var.nonstd		= 0;
717 	info->var.activate		= FB_ACTIVATE_NOW;
718 	info->var.height		= -1;
719 	info->var.width	= -1;
720 	info->var.accel_flags		= 0;
721 	info->var.vmode			= FB_VMODE_NONINTERLACED;
727 	info->var.grayscale = of_property_read_bool(np,
1017 	imxfb_check_var(&info->var, info);