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 | |
29 | enum { |
30 | OVERRIDE_NONE = 0x0, |
31 | OVERRIDE_BASE = 0x1, |
32 | OVERRIDE_STRIDE = 0x2, |
33 | OVERRIDE_HEIGHT = 0x4, |
34 | OVERRIDE_WIDTH = 0x8, |
35 | }; |
36 | |
37 | struct efifb_dmi_info efifb_dmi_list[] = { |
38 | [M_I17] = { "i17" , 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE }, |
39 | [M_I20] = { .optname: "i20" , .base: 0x80010000, .stride: 1728 * 4, .width: 1680, .height: 1050, .flags: OVERRIDE_NONE }, /* guess */ |
40 | [M_I20_SR] = { .optname: "imac7" , .base: 0x40010000, .stride: 1728 * 4, .width: 1680, .height: 1050, .flags: OVERRIDE_NONE }, |
41 | [M_I24] = { .optname: "i24" , .base: 0x80010000, .stride: 2048 * 4, .width: 1920, .height: 1200, .flags: OVERRIDE_NONE }, /* guess */ |
42 | [M_I24_8_1] = { .optname: "imac8" , .base: 0xc0060000, .stride: 2048 * 4, .width: 1920, .height: 1200, .flags: OVERRIDE_NONE }, |
43 | [M_I24_10_1] = { .optname: "imac10" , .base: 0xc0010000, .stride: 2048 * 4, .width: 1920, .height: 1080, .flags: OVERRIDE_NONE }, |
44 | [M_I27_11_1] = { .optname: "imac11" , .base: 0xc0010000, .stride: 2560 * 4, .width: 2560, .height: 1440, .flags: OVERRIDE_NONE }, |
45 | [M_MINI]= { .optname: "mini" , .base: 0x80000000, .stride: 2048 * 4, .width: 1024, .height: 768, .flags: OVERRIDE_NONE }, |
46 | [M_MINI_3_1] = { .optname: "mini31" , .base: 0x40010000, .stride: 1024 * 4, .width: 1024, .height: 768, .flags: OVERRIDE_NONE }, |
47 | [M_MINI_4_1] = { .optname: "mini41" , .base: 0xc0010000, .stride: 2048 * 4, .width: 1920, .height: 1200, .flags: OVERRIDE_NONE }, |
48 | [M_MB] = { .optname: "macbook" , .base: 0x80000000, .stride: 2048 * 4, .width: 1280, .height: 800, .flags: OVERRIDE_NONE }, |
49 | [M_MB_5_1] = { .optname: "macbook51" , .base: 0x80010000, .stride: 2048 * 4, .width: 1280, .height: 800, .flags: OVERRIDE_NONE }, |
50 | [M_MB_6_1] = { .optname: "macbook61" , .base: 0x80010000, .stride: 2048 * 4, .width: 1280, .height: 800, .flags: OVERRIDE_NONE }, |
51 | [M_MB_7_1] = { .optname: "macbook71" , .base: 0x80010000, .stride: 2048 * 4, .width: 1280, .height: 800, .flags: OVERRIDE_NONE }, |
52 | [M_MBA] = { .optname: "mba" , .base: 0x80000000, .stride: 2048 * 4, .width: 1280, .height: 800, .flags: OVERRIDE_NONE }, |
53 | /* 11" Macbook Air 3,1 passes the wrong stride */ |
54 | [M_MBA_3] = { .optname: "mba3" , .base: 0, .stride: 2048 * 4, .width: 0, .height: 0, .flags: OVERRIDE_STRIDE }, |
55 | [M_MBP] = { .optname: "mbp" , .base: 0x80010000, .stride: 1472 * 4, .width: 1440, .height: 900, .flags: OVERRIDE_NONE }, |
56 | [M_MBP_2] = { .optname: "mbp2" , .base: 0, .stride: 0, .width: 0, .height: 0, .flags: OVERRIDE_NONE }, /* placeholder */ |
57 | [M_MBP_2_2] = { .optname: "mbp22" , .base: 0x80010000, .stride: 1472 * 4, .width: 1440, .height: 900, .flags: OVERRIDE_NONE }, |
58 | [M_MBP_SR] = { .optname: "mbp3" , .base: 0x80030000, .stride: 2048 * 4, .width: 1440, .height: 900, .flags: OVERRIDE_NONE }, |
59 | [M_MBP_4] = { .optname: "mbp4" , .base: 0xc0060000, .stride: 2048 * 4, .width: 1920, .height: 1200, .flags: OVERRIDE_NONE }, |
60 | [M_MBP_5_1] = { .optname: "mbp51" , .base: 0xc0010000, .stride: 2048 * 4, .width: 1440, .height: 900, .flags: OVERRIDE_NONE }, |
61 | [M_MBP_5_2] = { .optname: "mbp52" , .base: 0xc0010000, .stride: 2048 * 4, .width: 1920, .height: 1200, .flags: OVERRIDE_NONE }, |
62 | [M_MBP_5_3] = { .optname: "mbp53" , .base: 0xd0010000, .stride: 2048 * 4, .width: 1440, .height: 900, .flags: OVERRIDE_NONE }, |
63 | [M_MBP_6_1] = { .optname: "mbp61" , .base: 0x90030000, .stride: 2048 * 4, .width: 1920, .height: 1200, .flags: OVERRIDE_NONE }, |
64 | [M_MBP_6_2] = { .optname: "mbp62" , .base: 0x90030000, .stride: 2048 * 4, .width: 1680, .height: 1050, .flags: OVERRIDE_NONE }, |
65 | [M_MBP_7_1] = { .optname: "mbp71" , .base: 0xc0010000, .stride: 2048 * 4, .width: 1280, .height: 800, .flags: OVERRIDE_NONE }, |
66 | [M_MBP_8_2] = { .optname: "mbp82" , .base: 0x90010000, .stride: 1472 * 4, .width: 1440, .height: 900, .flags: OVERRIDE_NONE }, |
67 | [M_UNKNOWN] = { NULL, .base: 0, .stride: 0, .width: 0, .height: 0, .flags: OVERRIDE_NONE } |
68 | }; |
69 | |
70 | void 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 | static int __init efifb_set_system(const struct dmi_system_id *id) |
95 | { |
96 | struct efifb_dmi_info *info = id->driver_data; |
97 | |
98 | if (info->base == 0 && info->height == 0 && info->width == 0 && |
99 | info->stride == 0) |
100 | return 0; |
101 | |
102 | /* Trust the bootloader over the DMI tables */ |
103 | if (screen_info.lfb_base == 0) { |
104 | #if defined(CONFIG_PCI) |
105 | struct pci_dev *dev = NULL; |
106 | int found_bar = 0; |
107 | #endif |
108 | if (info->base) { |
109 | screen_info.lfb_base = choose_value(info->base, |
110 | screen_info.lfb_base, OVERRIDE_BASE, |
111 | info->flags); |
112 | |
113 | #if defined(CONFIG_PCI) |
114 | /* make sure that the address in the table is actually |
115 | * on a VGA device's PCI BAR */ |
116 | |
117 | for_each_pci_dev(dev) { |
118 | int i; |
119 | if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) |
120 | continue; |
121 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
122 | resource_size_t start, end; |
123 | unsigned long flags; |
124 | |
125 | flags = pci_resource_flags(dev, i); |
126 | if (!(flags & IORESOURCE_MEM)) |
127 | continue; |
128 | |
129 | if (flags & IORESOURCE_UNSET) |
130 | continue; |
131 | |
132 | if (pci_resource_len(dev, i) == 0) |
133 | continue; |
134 | |
135 | start = pci_resource_start(dev, i); |
136 | end = pci_resource_end(dev, i); |
137 | if (screen_info.lfb_base >= start && |
138 | screen_info.lfb_base < end) { |
139 | found_bar = 1; |
140 | break; |
141 | } |
142 | } |
143 | } |
144 | if (!found_bar) |
145 | screen_info.lfb_base = 0; |
146 | #endif |
147 | } |
148 | } |
149 | if (screen_info.lfb_base) { |
150 | screen_info.lfb_linelength = choose_value(info->stride, |
151 | screen_info.lfb_linelength, OVERRIDE_STRIDE, |
152 | info->flags); |
153 | screen_info.lfb_width = choose_value(info->width, |
154 | screen_info.lfb_width, OVERRIDE_WIDTH, |
155 | info->flags); |
156 | screen_info.lfb_height = choose_value(info->height, |
157 | screen_info.lfb_height, OVERRIDE_HEIGHT, |
158 | info->flags); |
159 | if (screen_info.orig_video_isVGA == 0) |
160 | screen_info.orig_video_isVGA = VIDEO_TYPE_EFI; |
161 | } else { |
162 | screen_info.lfb_linelength = 0; |
163 | screen_info.lfb_width = 0; |
164 | screen_info.lfb_height = 0; |
165 | screen_info.orig_video_isVGA = 0; |
166 | return 0; |
167 | } |
168 | |
169 | printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x " |
170 | "(%dx%d, stride %d)\n" , id->ident, |
171 | screen_info.lfb_base, screen_info.lfb_width, |
172 | screen_info.lfb_height, screen_info.lfb_linelength); |
173 | |
174 | return 1; |
175 | } |
176 | |
177 | #define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \ |
178 | { \ |
179 | efifb_set_system, \ |
180 | name, \ |
181 | { \ |
182 | DMI_MATCH(DMI_BIOS_VENDOR, vendor), \ |
183 | DMI_MATCH(DMI_PRODUCT_NAME, name) \ |
184 | }, \ |
185 | &efifb_dmi_list[enumid] \ |
186 | } |
187 | |
188 | static const struct dmi_system_id efifb_dmi_system_table[] __initconst = { |
189 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "iMac4,1" , M_I17), |
190 | /* At least one of these two will be right; maybe both? */ |
191 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "iMac5,1" , M_I20), |
192 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac5,1" , M_I20), |
193 | /* At least one of these two will be right; maybe both? */ |
194 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "iMac6,1" , M_I24), |
195 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac6,1" , M_I24), |
196 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac7,1" , M_I20_SR), |
197 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac8,1" , M_I24_8_1), |
198 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac10,1" , M_I24_10_1), |
199 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac11,1" , M_I27_11_1), |
200 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "Macmini1,1" , M_MINI), |
201 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "Macmini3,1" , M_MINI_3_1), |
202 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "Macmini4,1" , M_MINI_4_1), |
203 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBook1,1" , M_MB), |
204 | /* At least one of these two will be right; maybe both? */ |
205 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBook2,1" , M_MB), |
206 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook2,1" , M_MB), |
207 | /* At least one of these two will be right; maybe both? */ |
208 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBook3,1" , M_MB), |
209 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook3,1" , M_MB), |
210 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook4,1" , M_MB), |
211 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook5,1" , M_MB_5_1), |
212 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook6,1" , M_MB_6_1), |
213 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook7,1" , M_MB_7_1), |
214 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookAir1,1" , M_MBA), |
215 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookAir3,1" , M_MBA_3), |
216 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBookPro1,1" , M_MBP), |
217 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBookPro2,1" , M_MBP_2), |
218 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBookPro2,2" , M_MBP_2_2), |
219 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro2,1" , M_MBP_2), |
220 | EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBookPro3,1" , M_MBP_SR), |
221 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro3,1" , M_MBP_SR), |
222 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro4,1" , M_MBP_4), |
223 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro5,1" , M_MBP_5_1), |
224 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro5,2" , M_MBP_5_2), |
225 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro5,3" , M_MBP_5_3), |
226 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro6,1" , M_MBP_6_1), |
227 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro6,2" , M_MBP_6_2), |
228 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro7,1" , M_MBP_7_1), |
229 | EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro8,2" , M_MBP_8_2), |
230 | {}, |
231 | }; |
232 | |
233 | /* |
234 | * Some devices have a portrait LCD but advertise a landscape resolution (and |
235 | * pitch). We simply swap width and height for these devices so that we can |
236 | * correctly deal with some of them coming with multiple resolutions. |
237 | */ |
238 | static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = { |
239 | { |
240 | /* |
241 | * Lenovo MIIX310-10ICR, only some batches have the troublesome |
242 | * 800x1280 portrait screen. Luckily the portrait version has |
243 | * its own BIOS version, so we match on that. |
244 | */ |
245 | .matches = { |
246 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ), |
247 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR" ), |
248 | DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1HCN44WW" ), |
249 | }, |
250 | }, |
251 | { |
252 | /* Lenovo MIIX 320-10ICR with 800x1280 portrait screen */ |
253 | .matches = { |
254 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ), |
255 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, |
256 | "Lenovo MIIX 320-10ICR" ), |
257 | }, |
258 | }, |
259 | { |
260 | /* Lenovo D330 with 800x1280 or 1200x1920 portrait screen */ |
261 | .matches = { |
262 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ), |
263 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, |
264 | "Lenovo ideapad D330-10IGM" ), |
265 | }, |
266 | }, |
267 | { |
268 | /* Lenovo IdeaPad Duet 3 10IGL5 with 1200x1920 portrait screen */ |
269 | .matches = { |
270 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ), |
271 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, |
272 | "IdeaPad Duet 3 10IGL5" ), |
273 | }, |
274 | }, |
275 | { |
276 | /* Lenovo Yoga Book X91F / X91L */ |
277 | .matches = { |
278 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ), |
279 | /* Non exact match to match F + L versions */ |
280 | DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91" ), |
281 | }, |
282 | }, |
283 | {}, |
284 | }; |
285 | |
286 | static bool efifb_overlaps_pci_range(const struct of_pci_range *range) |
287 | { |
288 | u64 fb_base = screen_info.lfb_base; |
289 | |
290 | if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) |
291 | fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32; |
292 | |
293 | return fb_base >= range->cpu_addr && |
294 | fb_base < (range->cpu_addr + range->size); |
295 | } |
296 | |
297 | static struct device_node *find_pci_overlap_node(void) |
298 | { |
299 | struct device_node *np; |
300 | |
301 | for_each_node_by_type(np, "pci" ) { |
302 | struct of_pci_range_parser parser; |
303 | struct of_pci_range range; |
304 | int err; |
305 | |
306 | err = of_pci_range_parser_init(parser: &parser, node: np); |
307 | if (err) { |
308 | pr_warn("of_pci_range_parser_init() failed: %d\n" , err); |
309 | continue; |
310 | } |
311 | |
312 | for_each_of_pci_range(&parser, &range) |
313 | if (efifb_overlaps_pci_range(range: &range)) |
314 | return np; |
315 | } |
316 | return NULL; |
317 | } |
318 | |
319 | /* |
320 | * If the efifb framebuffer is backed by a PCI graphics controller, we have |
321 | * to ensure that this relation is expressed using a device link when |
322 | * running in DT mode, or the probe order may be reversed, resulting in a |
323 | * resource reservation conflict on the memory window that the efifb |
324 | * framebuffer steals from the PCIe host bridge. |
325 | */ |
326 | static int efifb_add_links(struct fwnode_handle *fwnode) |
327 | { |
328 | struct device_node *sup_np; |
329 | |
330 | sup_np = find_pci_overlap_node(); |
331 | |
332 | /* |
333 | * If there's no PCI graphics controller backing the efifb, we are |
334 | * done here. |
335 | */ |
336 | if (!sup_np) |
337 | return 0; |
338 | |
339 | fwnode_link_add(con: fwnode, of_fwnode_handle(sup_np), flags: 0); |
340 | of_node_put(node: sup_np); |
341 | |
342 | return 0; |
343 | } |
344 | |
345 | static const struct fwnode_operations efifb_fwnode_ops = { |
346 | .add_links = efifb_add_links, |
347 | }; |
348 | |
349 | #ifdef CONFIG_EFI |
350 | static 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(list: efifb_dmi_system_table); |
357 | |
358 | if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && |
359 | dmi_check_system(list: 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(fwnode: &efifb_fwnode, ops: &efifb_fwnode_ops); |
372 | pd->dev.fwnode = &efifb_fwnode; |
373 | } |
374 | } |
375 | #endif |
376 | |