1 // SPDX-License-Identifier: GPL-2.0
5  * (c) 2006 Edgar Hucek <gimli@dark-green.com>
6  * Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
12 #include <linux/efi-bgrt.h>
54 	.height			= -1,
55 	.width			= -1,
81 	if (regno >= info->cmap.len)  in efifb_setcolreg()
85 		red   >>= 16 - info->var.red.length;  in efifb_setcolreg()
86 		green >>= 16 - info->var.green.length;  in efifb_setcolreg()
87 		blue  >>= 16 - info->var.blue.length;  in efifb_setcolreg()
88 		((u32 *)(info->pseudo_palette))[regno] =  in efifb_setcolreg()
89 			(red   << info->var.red.offset)   |  in efifb_setcolreg()
90 			(green << info->var.green.offset) |  in efifb_setcolreg()
91 			(blue  << info->var.blue.offset);  in efifb_setcolreg()
108 	while (width--) {  in efifb_copy_bmp()
112 		*dst++ = (r << si->red_pos)   |  in efifb_copy_bmp()
113 			 (g << si->green_pos) |  in efifb_copy_bmp()
114 			 (b << si->blue_pos);  in efifb_copy_bmp()
120  * On x86 some firmwares use a low non native resolution for the display when
122  * for the native resolution. If the bgrt image intended for the native
123  * resolution still fits, it will be displayed very close to the right edge of
132 	u32 expected_xoffset = (si->lfb_width - bmp_width) / 2;  in efifb_bgrt_sanity_check()
150 	u8 *dst = info->screen_base;  in efifb_show_boot_graphics()
161 		pr_info("efifb: BGRT rotation bits set, not showing boot graphics\n");  in efifb_show_boot_graphics()
171 	if (si->lfb_depth != 32) {  in efifb_show_boot_graphics()
172 		pr_info("efifb: not 32 bits, not showing boot graphics\n");  in efifb_show_boot_graphics()
187 	if (file_header->id != 0x4d42 || file_header->reserved != 0)  in efifb_show_boot_graphics()
191 	if (dib_header->dib_header_size != 40 || dib_header->width < 0 ||  in efifb_show_boot_graphics()
192 	    dib_header->planes != 1 || dib_header->bpp != 24 ||  in efifb_show_boot_graphics()
193 	    dib_header->compression != 0)  in efifb_show_boot_graphics()
196 	bmp_width = dib_header->width;  in efifb_show_boot_graphics()
197 	bmp_height = abs(dib_header->height);  in efifb_show_boot_graphics()
200 	if ((file_header->bitmap_offset + bmp_pitch * bmp_height) >  in efifb_show_boot_graphics()
204 	if ((bgrt_tab.image_offset_x + bmp_width) > si->lfb_width ||  in efifb_show_boot_graphics()
205 	    (bgrt_tab.image_offset_y + bmp_height) > si->lfb_height)  in efifb_show_boot_graphics()
213 	for (y = 0; y < si->lfb_height; y++, dst += si->lfb_linelength) {  in efifb_show_boot_graphics()
217 			memset(dst, 0, 4 * si->lfb_width);  in efifb_show_boot_graphics()
221 		src_y = y - bgrt_tab.image_offset_y;  in efifb_show_boot_graphics()
223 		if (dib_header->height > 0)  in efifb_show_boot_graphics()
224 			src_y = (bmp_height - 1) - src_y;  in efifb_show_boot_graphics()
228 		efifb_copy_bmp(bgrt_image + file_header->bitmap_offset +  in efifb_show_boot_graphics()
232 		memset((u32 *)dst + dst_x, 0, (si->lfb_width - dst_x) * 4);  in efifb_show_boot_graphics()
253 		pm_runtime_put(&efifb_pci_dev->dev);  in efifb_destroy()
255 	if (info->screen_base) {  in efifb_destroy()
257 			iounmap(info->screen_base);  in efifb_destroy()
259 			memunmap(info->screen_base);  in efifb_destroy()
263 		release_mem_region(info->apertures->ranges[0].base,  in efifb_destroy()
264 				   info->apertures->ranges[0].size);  in efifb_destroy()
265 	fb_dealloc_cmap(&info->cmap);  in efifb_destroy()
362 		return -ENODEV;  in efifb_probe()
365 		return -ENODEV;  in efifb_probe()
373 		return -ENODEV;  in efifb_probe()
381 		return -ENODEV;  in efifb_probe()
407 	    bar_resource->start + bar_offset != efifb_fix.smem_start) {  in efifb_probe()
408 		dev_info(&efifb_pci_dev->dev,  in efifb_probe()
410 		efifb_fix.smem_start = bar_resource->start + bar_offset;  in efifb_probe()
418 	/*   size_vmode -- that is the amount of memory needed for the  in efifb_probe()
423 	/*   size_total -- all video memory we have. Used for  in efifb_probe()
430 	/*   size_remap -- the amount of video memory we are going to  in efifb_probe()
438 		size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);  in efifb_probe()
450 	info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);  in efifb_probe()
452 		err = -ENOMEM;  in efifb_probe()
456 	info->pseudo_palette = info->par;  in efifb_probe()
457 	info->par = NULL;  in efifb_probe()
459 	info->apertures = alloc_apertures(1);  in efifb_probe()
460 	if (!info->apertures) {  in efifb_probe()
461 		err = -ENOMEM;  in efifb_probe()
464 	info->apertures->ranges[0].base = efifb_fix.smem_start;  in efifb_probe()
465 	info->apertures->ranges[0].size = size_remap;  in efifb_probe()
473 			err = -EIO;  in efifb_probe()
488 		info->screen_base = ioremap_wc(efifb_fix.smem_start,  in efifb_probe()
491 		info->screen_base = ioremap(efifb_fix.smem_start,  in efifb_probe()
494 		info->screen_base = memremap(efifb_fix.smem_start,  in efifb_probe()
497 		info->screen_base = memremap(efifb_fix.smem_start,  in efifb_probe()
499 	if (!info->screen_base) {  in efifb_probe()
502 		err = -EIO;  in efifb_probe()
551 	info->fbops = &efifb_ops;  in efifb_probe()
552 	info->var = efifb_defined;  in efifb_probe()
553 	info->fix = efifb_fix;  in efifb_probe()
554 	info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE;  in efifb_probe()
560 		info->fbcon_rotate_hint = FB_ROTATE_UR;  in efifb_probe()
563 		info->fbcon_rotate_hint = FB_ROTATE_UD;  in efifb_probe()
566 		info->fbcon_rotate_hint = FB_ROTATE_CCW;  in efifb_probe()
569 		info->fbcon_rotate_hint = FB_ROTATE_CW;  in efifb_probe()
573 	err = sysfs_create_groups(&dev->dev.kobj, efifb_groups);  in efifb_probe()
578 	err = fb_alloc_cmap(&info->cmap, 256, 0);  in efifb_probe()
585 		WARN_ON(pm_runtime_get_sync(&efifb_pci_dev->dev) < 0);  in efifb_probe()
592 	fb_info(info, "%s frame buffer device\n", info->fix.id);  in efifb_probe()
597 		pm_runtime_put(&efifb_pci_dev->dev);  in efifb_probe()
599 	fb_dealloc_cmap(&info->cmap);  in efifb_probe()
601 	sysfs_remove_groups(&dev->dev.kobj, efifb_groups);  in efifb_probe()
604 		iounmap(info->screen_base);  in efifb_probe()
606 		memunmap(info->screen_base);  in efifb_probe()
621 	sysfs_remove_groups(&pdev->dev.kobj, efifb_groups);  in efifb_remove()
628 		.name = "efi-framebuffer",
647 		dev_err(&dev->dev,  in record_efifb_bar_resource()
648 			"BAR %d: assigned to efifb but device is disabled!\n",  in record_efifb_bar_resource()
653 	bar_resource = &dev->resource[idx];  in record_efifb_bar_resource()
656 	dev_info(&dev->dev, "BAR %d: assigned to efifb\n", idx);  in record_efifb_bar_resource()
675 		struct resource *res = &dev->resource[i];  in efifb_fixup_resources()
677 		if (!(res->flags & IORESOURCE_MEM))  in efifb_fixup_resources()
680 		if (res->start <= base && res->end >= base + size - 1) {  in efifb_fixup_resources()
681 			record_efifb_bar_resource(dev, i, base - res->start);  in efifb_fixup_resources()