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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Generic System Framebuffers
4 * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com>
5 *
6 * EFI Quirks Copyright (c) 2006 Edgar Hucek <gimli@dark-green.com>
7 */
8
9/*
10 * EFI Quirks
11 * Several EFI systems do not correctly advertise their boot framebuffers.
12 * Hence, we use this static table of known broken machines and fix up the
13 * information so framebuffer drivers can load correctly.
14 */
15
16#include <linux/dmi.h>
17#include <linux/err.h>
18#include <linux/efi.h>
19#include <linux/init.h>
20#include <linux/kernel.h>
21#include <linux/mm.h>
22#include <linux/of_address.h>
23#include <linux/pci.h>
24#include <linux/platform_device.h>
25#include <linux/screen_info.h>
26#include <linux/sysfb.h>
27#include <video/vga.h>
28
29enum {
30 OVERRIDE_NONE = 0x0,
31 OVERRIDE_BASE = 0x1,
32 OVERRIDE_STRIDE = 0x2,
33 OVERRIDE_HEIGHT = 0x4,
34 OVERRIDE_WIDTH = 0x8,
35};
36
37struct efifb_dmi_info efifb_dmi_list[] = {
38 [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
39 [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
40 [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
41 [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
42 [M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
43 [M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
44 [M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
45 [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
46 [M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
47 [M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
48 [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
49 [M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
50 [M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
51 [M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
52 [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
53 /* 11" Macbook Air 3,1 passes the wrong stride */
54 [M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
55 [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
56 [M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
57 [M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
58 [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
59 [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
60 [M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
61 [M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
62 [M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
63 [M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
64 [M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
65 [M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
66 [M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
67 [M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
68};
69
70void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
71{
72 int i;
73
74 for (i = 0; i < M_UNKNOWN; i++) {
75 if (efifb_dmi_list[i].base != 0 &&
76 !strcmp(opt, efifb_dmi_list[i].optname)) {
77 si->lfb_base = efifb_dmi_list[i].base;
78 si->lfb_linelength = efifb_dmi_list[i].stride;
79 si->lfb_width = efifb_dmi_list[i].width;
80 si->lfb_height = efifb_dmi_list[i].height;
81 }
82 }
83}
84
85#define choose_value(dmivalue, fwvalue, field, flags) ({ \
86 typeof(fwvalue) _ret_ = fwvalue; \
87 if ((flags) & (field)) \
88 _ret_ = dmivalue; \
89 else if ((fwvalue) == 0) \
90 _ret_ = dmivalue; \
91 _ret_; \
92 })
93
94#ifdef CONFIG_EFI
95static int __init efifb_set_system(const struct dmi_system_id *id)
96{
97 struct efifb_dmi_info *info = id->driver_data;
98
99 if (info->base == 0 && info->height == 0 && info->width == 0 &&
100 info->stride == 0)
101 return 0;
102
103 /* Trust the bootloader over the DMI tables */
104 if (screen_info.lfb_base == 0) {
105#if defined(CONFIG_PCI)
106 struct pci_dev *dev = NULL;
107 int found_bar = 0;
108#endif
109 if (info->base) {
110 screen_info.lfb_base = choose_value(info->base,
111 screen_info.lfb_base, OVERRIDE_BASE,
112 info->flags);
113
114#if defined(CONFIG_PCI)
115 /* make sure that the address in the table is actually
116 * on a VGA device's PCI BAR */
117
118 for_each_pci_dev(dev) {
119 int i;
120 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
121 continue;
122 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
123 resource_size_t start, end;
124 unsigned long flags;
125
126 flags = pci_resource_flags(dev, i);
127 if (!(flags & IORESOURCE_MEM))
128 continue;
129
130 if (flags & IORESOURCE_UNSET)
131 continue;
132
133 if (pci_resource_len(dev, i) == 0)
134 continue;
135
136 start = pci_resource_start(dev, i);
137 end = pci_resource_end(dev, i);
138 if (screen_info.lfb_base >= start &&
139 screen_info.lfb_base < end) {
140 found_bar = 1;
141 break;
142 }
143 }
144 }
145 if (!found_bar)
146 screen_info.lfb_base = 0;
147#endif
148 }
149 }
150 if (screen_info.lfb_base) {
151 screen_info.lfb_linelength = choose_value(info->stride,
152 screen_info.lfb_linelength, OVERRIDE_STRIDE,
153 info->flags);
154 screen_info.lfb_width = choose_value(info->width,
155 screen_info.lfb_width, OVERRIDE_WIDTH,
156 info->flags);
157 screen_info.lfb_height = choose_value(info->height,
158 screen_info.lfb_height, OVERRIDE_HEIGHT,
159 info->flags);
160 if (screen_info.orig_video_isVGA == 0)
161 screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
162 } else {
163 screen_info.lfb_linelength = 0;
164 screen_info.lfb_width = 0;
165 screen_info.lfb_height = 0;
166 screen_info.orig_video_isVGA = 0;
167 return 0;
168 }
169
170 printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
171 "(%dx%d, stride %d)\n", id->ident,
172 screen_info.lfb_base, screen_info.lfb_width,
173 screen_info.lfb_height, screen_info.lfb_linelength);
174
175 return 1;
176}
177
178#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
179 { \
180 efifb_set_system, \
181 name, \
182 { \
183 DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
184 DMI_MATCH(DMI_PRODUCT_NAME, name) \
185 }, \
186 &efifb_dmi_list[enumid] \
187 }
188
189static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
190 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
191 /* At least one of these two will be right; maybe both? */
192 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
193 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
194 /* At least one of these two will be right; maybe both? */
195 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
196 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
197 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
198 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
199 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
200 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
201 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
202 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
203 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
204 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
205 /* At least one of these two will be right; maybe both? */
206 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
207 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
208 /* At least one of these two will be right; maybe both? */
209 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
210 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
211 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
212 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
213 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
214 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
215 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
216 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
217 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
218 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
219 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
220 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
221 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
222 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
223 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
224 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
225 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
226 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
227 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
228 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
229 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
230 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
231 {},
232};
233
234/*
235 * Some devices have a portrait LCD but advertise a landscape resolution (and
236 * pitch). We simply swap width and height for these devices so that we can
237 * correctly deal with some of them coming with multiple resolutions.
238 */
239static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
240 {
241 /*
242 * Lenovo MIIX310-10ICR, only some batches have the troublesome
243 * 800x1280 portrait screen. Luckily the portrait version has
244 * its own BIOS version, so we match on that.
245 */
246 .matches = {
247 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
248 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR"),
249 DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1HCN44WW"),
250 },
251 },
252 {
253 /* Lenovo MIIX 320-10ICR with 800x1280 portrait screen */
254 .matches = {
255 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
256 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
257 "Lenovo MIIX 320-10ICR"),
258 },
259 },
260 {
261 /* Lenovo D330 with 800x1280 or 1200x1920 portrait screen */
262 .matches = {
263 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
264 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
265 "Lenovo ideapad D330-10IGM"),
266 },
267 },
268 {
269 /* Lenovo IdeaPad Duet 3 10IGL5 with 1200x1920 portrait screen */
270 .matches = {
271 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
272 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
273 "IdeaPad Duet 3 10IGL5"),
274 },
275 },
276 {
277 /* Lenovo Yoga Book X91F / X91L */
278 .matches = {
279 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
280 /* Non exact match to match F + L versions */
281 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91"),
282 },
283 },
284 {},
285};
286
287static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
288{
289 u64 fb_base = screen_info.lfb_base;
290
291 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
292 fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;
293
294 return fb_base >= range->cpu_addr &&
295 fb_base < (range->cpu_addr + range->size);
296}
297
298static struct device_node *find_pci_overlap_node(void)
299{
300 struct device_node *np;
301
302 for_each_node_by_type(np, "pci") {
303 struct of_pci_range_parser parser;
304 struct of_pci_range range;
305 int err;
306
307 err = of_pci_range_parser_init(&parser, np);
308 if (err) {
309 pr_warn("of_pci_range_parser_init() failed: %d\n", err);
310 continue;
311 }
312
313 for_each_of_pci_range(&parser, &range)
314 if (efifb_overlaps_pci_range(&range))
315 return np;
316 }
317 return NULL;
318}
319
320/*
321 * If the efifb framebuffer is backed by a PCI graphics controller, we have
322 * to ensure that this relation is expressed using a device link when
323 * running in DT mode, or the probe order may be reversed, resulting in a
324 * resource reservation conflict on the memory window that the efifb
325 * framebuffer steals from the PCIe host bridge.
326 */
327static int efifb_add_links(struct fwnode_handle *fwnode)
328{
329 struct device_node *sup_np;
330
331 sup_np = find_pci_overlap_node();
332
333 /*
334 * If there's no PCI graphics controller backing the efifb, we are
335 * done here.
336 */
337 if (!sup_np)
338 return 0;
339
340 fwnode_link_add(fwnode, of_fwnode_handle(sup_np), 0);
341 of_node_put(sup_np);
342
343 return 0;
344}
345
346static const struct fwnode_operations efifb_fwnode_ops = {
347 .add_links = efifb_add_links,
348};
349
350static struct fwnode_handle efifb_fwnode;
351
352__init void sysfb_apply_efi_quirks(void)
353{
354 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
355 !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
356 dmi_check_system(efifb_dmi_system_table);
357
358 if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
359 dmi_check_system(efifb_dmi_swap_width_height)) {
360 u16 temp = screen_info.lfb_width;
361
362 screen_info.lfb_width = screen_info.lfb_height;
363 screen_info.lfb_height = temp;
364 screen_info.lfb_linelength = 4 * screen_info.lfb_width;
365 }
366}
367
368__init void sysfb_set_efifb_fwnode(struct platform_device *pd)
369{
370 if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
371 fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
372 pd->dev.fwnode = &efifb_fwnode;
373 }
374}
375#endif