video/fbdev/sstfb.c

68  * SST_DEBUG_VAR : debug display/var structs
343  *      sstfb_check_var - Optional function.  Validates a var passed in.
344  *      @var: frame buffer variable screen structure
351 static int sstfb_check_var(struct fb_var_screeninfo *var,
355 	int hSyncOff   = var->xres + var->right_margin + var->left_margin;
356 	int vSyncOff   = var->yres + var->lower_margin + var->upper_margin;
357 	int vBackPorch = var->left_margin, yDim = var->yres;
358 	int vSyncOn    = var->vsync_len;
362 	if (sst_calc_pll(PICOS2KHZ(var->pixclock), &freq, &par->pll)) {
364 				PICOS2KHZ(var->pixclock));
367 	var->pixclock = KHZ2PICOS(freq);
369 	if (var->vmode & FB_VMODE_INTERLACED)
371 	if (var->vmode & FB_VMODE_DOUBLE) {
378 	switch (var->bits_per_pixel) {
380 		var->bits_per_pixel = 16;
383 		printk(KERN_ERR "sstfb: Unsupported bpp %d\n", var->bits_per_pixel);
388 	if (var->xres <= 1 || yDim <= 0 || var->hsync_len <= 1  ||
389 	    hSyncOff <= 1  || var->left_margin <= 2  || vSyncOn <= 0 ||
396 		tiles_in_X = (var->xres + 63 ) / 64 * 2;
398 		if (var->xres  > POW2(11) || yDim >= POW2(11)) {
400 			         var->xres, var->yres);
404 		if (var->hsync_len > POW2(9) || hSyncOff > POW2(11) ||
405 		    var->left_margin - 2 >= POW2(9) || vSyncOn >= POW2(13) ||
413 		tiles_in_X = (var->xres + 63 ) / 64;
415 		if (var->vmode) {
417 				var->vmode);
420 		if (var->xres > POW2(10) || var->yres >= POW2(10)) {
422 			         var->xres, var->yres);
425 		if (var->hsync_len > POW2(8) || hSyncOff - 1 > POW2(10) ||
426 		    var->left_margin - 2 >= POW2(8) || vSyncOn >= POW2(12) ||
437 	              * ((var->bits_per_pixel == 16) ? 2 : 4);
444 	var->sync &= (FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT);
445 	var->vmode &= (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE);
446 	var->xoffset = 0;
447 	var->yoffset = 0;
448 	var->height  = -1;
449 	var->width   = -1;
454 	/* var->{red|green|blue}.msb_right = 0; */
456 	switch (var->bits_per_pixel) {
458 		var->red.length    = 5;
459 		var->green.length  = 6;
460 		var->blue.length   = 5;
461 		var->transp.length = 0;
463 		var->red.offset    = 11;
464 		var->green.offset  = 5;
465 		var->blue.offset   = 0;
466 		var->transp.offset = 0;
486 	par->hSyncOff	= info->var.xres + info->var.right_margin + info->var.left_margin;
488 	par->yDim 	= info->var.yres;
489 	par->vSyncOn 	= info->var.vsync_len;
490 	par->vSyncOff	= info->var.yres + info->var.lower_margin + info->var.upper_margin;
491 	par->vBackPorch = info->var.upper_margin;
494 	sst_calc_pll(PICOS2KHZ(info->var.pixclock), &freq, &par->pll);
496 	if (info->var.vmode & FB_VMODE_INTERLACED)
498 	if (info->var.vmode & FB_VMODE_DOUBLE) {
508 		par->tiles_in_X = (info->var.xres + 63 ) / 64 * 2;
511 		par->tiles_in_X = (info->var.xres + 63 ) / 64;
516 	           info->var.hsync_len, par->hSyncOff,
520 	           info->var.left_margin, info->var.upper_margin,
521 	           info->var.xres, info->var.yres, PICOS2KHZ(info->var.pixclock));
533 	sst_write(BACKPORCH, par->vBackPorch << 16 | (info->var.left_margin - 2));
534 	sst_write(VIDEODIMENSIONS, par->yDim << 16 | (info->var.xres - 1));
535 	sst_write(HSYNC, (par->hSyncOff - 1) << 16 | (info->var.hsync_len - 1));
545 	par->dac_sw.set_vidmod(info, info->var.bits_per_pixel);
588 	switch (info->var.bits_per_pixel) {
599 		if (info->var.vmode & FB_VMODE_INTERLACED)
601 		if (info->var.vmode & FB_VMODE_DOUBLE)
603 		if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
605 		if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
618 	switch (info->var.bits_per_pixel) {
647 		            info->var.xres - 1, par->yDim - 1);
649 		sst_write(CLIP_LEFT_RIGHT, info->var.xres);
680 	red    >>= (16 - info->var.red.length);
681 	green  >>= (16 - info->var.green.length);
682 	blue   >>= (16 - info->var.blue.length);
683 	transp >>= (16 - info->var.transp.length);
684 	col = (red << info->var.red.offset)
685 	    | (green << info->var.green.offset)
686 	    | (blue  << info->var.blue.offset)
687 	    | (transp << info->var.transp.offset);
807 	sst_write(BLTCLIPX, info->var.xres);
808 	sst_write(BLTCLIPY, info->var.yres);
1413 	fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 16);
1415 	if (sstfb_check_var(&info->var, info)) {