357 lines
12 KiB
C
357 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Generic System Framebuffers
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* Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com>
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*
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* EFI Quirks Copyright (c) 2006 Edgar Hucek <gimli@dark-green.com>
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*/
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/*
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* EFI Quirks
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* Several EFI systems do not correctly advertise their boot framebuffers.
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* Hence, we use this static table of known broken machines and fix up the
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* information so framebuffer drivers can load correctly.
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*/
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#include <linux/dmi.h>
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#include <linux/err.h>
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#include <linux/efi.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/of_address.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/screen_info.h>
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#include <linux/sysfb.h>
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#include <video/vga.h>
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enum {
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OVERRIDE_NONE = 0x0,
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OVERRIDE_BASE = 0x1,
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OVERRIDE_STRIDE = 0x2,
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OVERRIDE_HEIGHT = 0x4,
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OVERRIDE_WIDTH = 0x8,
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};
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struct efifb_dmi_info efifb_dmi_list[] = {
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[M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
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[M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
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[M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
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[M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
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[M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
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[M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
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[M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
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[M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
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[M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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/* 11" Macbook Air 3,1 passes the wrong stride */
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[M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
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[M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
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[M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
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[M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
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[M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
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[M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
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[M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
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[M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
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};
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void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
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{
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int i;
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for (i = 0; i < M_UNKNOWN; i++) {
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if (efifb_dmi_list[i].base != 0 &&
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!strcmp(opt, efifb_dmi_list[i].optname)) {
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si->lfb_base = efifb_dmi_list[i].base;
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si->lfb_linelength = efifb_dmi_list[i].stride;
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si->lfb_width = efifb_dmi_list[i].width;
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si->lfb_height = efifb_dmi_list[i].height;
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}
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}
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}
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#define choose_value(dmivalue, fwvalue, field, flags) ({ \
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typeof(fwvalue) _ret_ = fwvalue; \
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if ((flags) & (field)) \
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_ret_ = dmivalue; \
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else if ((fwvalue) == 0) \
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_ret_ = dmivalue; \
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_ret_; \
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})
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static int __init efifb_set_system(const struct dmi_system_id *id)
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{
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struct efifb_dmi_info *info = id->driver_data;
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if (info->base == 0 && info->height == 0 && info->width == 0 &&
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info->stride == 0)
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return 0;
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/* Trust the bootloader over the DMI tables */
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if (screen_info.lfb_base == 0) {
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#if defined(CONFIG_PCI)
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struct pci_dev *dev = NULL;
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int found_bar = 0;
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#endif
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if (info->base) {
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screen_info.lfb_base = choose_value(info->base,
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screen_info.lfb_base, OVERRIDE_BASE,
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info->flags);
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#if defined(CONFIG_PCI)
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/* make sure that the address in the table is actually
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* on a VGA device's PCI BAR */
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for_each_pci_dev(dev) {
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int i;
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if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
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continue;
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for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
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resource_size_t start, end;
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unsigned long flags;
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flags = pci_resource_flags(dev, i);
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if (!(flags & IORESOURCE_MEM))
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continue;
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if (flags & IORESOURCE_UNSET)
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continue;
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if (pci_resource_len(dev, i) == 0)
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continue;
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start = pci_resource_start(dev, i);
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end = pci_resource_end(dev, i);
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if (screen_info.lfb_base >= start &&
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screen_info.lfb_base < end) {
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found_bar = 1;
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break;
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}
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}
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}
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if (!found_bar)
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screen_info.lfb_base = 0;
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#endif
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}
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}
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if (screen_info.lfb_base) {
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screen_info.lfb_linelength = choose_value(info->stride,
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screen_info.lfb_linelength, OVERRIDE_STRIDE,
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info->flags);
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screen_info.lfb_width = choose_value(info->width,
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screen_info.lfb_width, OVERRIDE_WIDTH,
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info->flags);
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screen_info.lfb_height = choose_value(info->height,
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screen_info.lfb_height, OVERRIDE_HEIGHT,
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info->flags);
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if (screen_info.orig_video_isVGA == 0)
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screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
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} else {
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screen_info.lfb_linelength = 0;
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screen_info.lfb_width = 0;
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screen_info.lfb_height = 0;
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screen_info.orig_video_isVGA = 0;
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return 0;
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}
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printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
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"(%dx%d, stride %d)\n", id->ident,
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screen_info.lfb_base, screen_info.lfb_width,
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screen_info.lfb_height, screen_info.lfb_linelength);
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return 1;
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}
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#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
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{ \
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efifb_set_system, \
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name, \
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{ \
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DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
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DMI_MATCH(DMI_PRODUCT_NAME, name) \
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}, \
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&efifb_dmi_list[enumid] \
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}
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static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
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/* At least one of these two will be right; maybe both? */
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
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/* At least one of these two will be right; maybe both? */
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
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/* At least one of these two will be right; maybe both? */
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
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/* At least one of these two will be right; maybe both? */
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
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EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
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EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
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{},
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};
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/*
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* Some devices have a portrait LCD but advertise a landscape resolution (and
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* pitch). We simply swap width and height for these devices so that we can
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* correctly deal with some of them coming with multiple resolutions.
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*/
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static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
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{
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/*
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* Lenovo MIIX310-10ICR, only some batches have the troublesome
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* 800x1280 portrait screen. Luckily the portrait version has
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* its own BIOS version, so we match on that.
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*/
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.matches = {
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DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR"),
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DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1HCN44WW"),
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},
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},
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{
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/* Lenovo MIIX 320-10ICR with 800x1280 portrait screen */
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.matches = {
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DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
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"Lenovo MIIX 320-10ICR"),
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},
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},
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{
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/* Lenovo D330 with 800x1280 or 1200x1920 portrait screen */
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.matches = {
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DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
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DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
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"Lenovo ideapad D330-10IGM"),
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},
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},
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{},
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};
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static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
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{
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u64 fb_base = screen_info.lfb_base;
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if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
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fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;
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return fb_base >= range->cpu_addr &&
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fb_base < (range->cpu_addr + range->size);
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}
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static struct device_node *find_pci_overlap_node(void)
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{
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struct device_node *np;
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for_each_node_by_type(np, "pci") {
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struct of_pci_range_parser parser;
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struct of_pci_range range;
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int err;
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err = of_pci_range_parser_init(&parser, np);
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if (err) {
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pr_warn("of_pci_range_parser_init() failed: %d\n", err);
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continue;
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}
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for_each_of_pci_range(&parser, &range)
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if (efifb_overlaps_pci_range(&range))
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return np;
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}
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return NULL;
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}
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/*
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* If the efifb framebuffer is backed by a PCI graphics controller, we have
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* to ensure that this relation is expressed using a device link when
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* running in DT mode, or the probe order may be reversed, resulting in a
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* resource reservation conflict on the memory window that the efifb
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* framebuffer steals from the PCIe host bridge.
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*/
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static int efifb_add_links(struct fwnode_handle *fwnode)
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{
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struct device_node *sup_np;
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sup_np = find_pci_overlap_node();
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/*
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* If there's no PCI graphics controller backing the efifb, we are
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* done here.
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*/
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if (!sup_np)
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return 0;
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fwnode_link_add(fwnode, of_fwnode_handle(sup_np));
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of_node_put(sup_np);
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return 0;
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}
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static const struct fwnode_operations efifb_fwnode_ops = {
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.add_links = efifb_add_links,
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};
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#ifdef CONFIG_EFI
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static struct fwnode_handle efifb_fwnode;
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__init void sysfb_apply_efi_quirks(struct platform_device *pd)
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{
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if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
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!(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
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dmi_check_system(efifb_dmi_system_table);
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if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
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dmi_check_system(efifb_dmi_swap_width_height)) {
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u16 temp = screen_info.lfb_width;
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screen_info.lfb_width = screen_info.lfb_height;
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screen_info.lfb_height = temp;
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screen_info.lfb_linelength = 4 * screen_info.lfb_width;
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}
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if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
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fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
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pd->dev.fwnode = &efifb_fwnode;
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}
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}
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#endif
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