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] = { "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
efifb_setup_from_dmi(struct screen_info * si,const char * opt)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 #ifdef CONFIG_EFI
efifb_set_system(struct screen_info * si,const struct dmi_system_id * id)95 static int __init efifb_set_system(struct screen_info *si, 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 (si->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 si->lfb_base = choose_value(info->base,
111 si->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 (si->lfb_base >= start && si->lfb_base < end) {
139 found_bar = 1;
140 break;
141 }
142 }
143 }
144 if (!found_bar)
145 si->lfb_base = 0;
146 #endif
147 }
148 }
149 if (si->lfb_base) {
150 si->lfb_linelength = choose_value(info->stride,
151 si->lfb_linelength, OVERRIDE_STRIDE,
152 info->flags);
153 si->lfb_width = choose_value(info->width,
154 si->lfb_width, OVERRIDE_WIDTH,
155 info->flags);
156 si->lfb_height = choose_value(info->height,
157 si->lfb_height, OVERRIDE_HEIGHT,
158 info->flags);
159 if (si->orig_video_isVGA == 0)
160 si->orig_video_isVGA = VIDEO_TYPE_EFI;
161 } else {
162 si->lfb_linelength = 0;
163 si->lfb_width = 0;
164 si->lfb_height = 0;
165 si->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 si->lfb_base, si->lfb_width,
172 si->lfb_height, si->lfb_linelength);
173
174 return 1;
175 }
176
efifb_set_system_callback(const struct dmi_system_id * id)177 static int __init efifb_set_system_callback(const struct dmi_system_id *id)
178 {
179 return efifb_set_system(&sysfb_primary_display.screen, id);
180 }
181
182 #define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
183 { \
184 efifb_set_system_callback, \
185 name, \
186 { \
187 DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
188 DMI_MATCH(DMI_PRODUCT_NAME, name) \
189 }, \
190 &efifb_dmi_list[enumid] \
191 }
192
193 static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
194 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
195 /* At least one of these two will be right; maybe both? */
196 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
197 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
198 /* At least one of these two will be right; maybe both? */
199 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
200 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
201 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
202 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
203 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
204 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
205 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
206 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
207 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
208 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
209 /* At least one of these two will be right; maybe both? */
210 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
211 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
212 /* At least one of these two will be right; maybe both? */
213 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
214 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
215 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
216 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
217 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
218 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
219 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
220 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
221 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
222 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
223 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
224 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
225 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
226 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
227 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
228 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
229 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
230 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
231 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
232 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
233 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
234 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
235 {},
236 };
237
efifb_swap_width_height(const struct dmi_system_id * id)238 static int __init efifb_swap_width_height(const struct dmi_system_id *id)
239 {
240 struct screen_info *si = &sysfb_primary_display.screen;
241 u32 bpp = __screen_info_lfb_bits_per_pixel(si);
242
243 swap(si->lfb_width, si->lfb_height);
244 si->lfb_linelength = bpp * si->lfb_width / BITS_PER_BYTE;
245
246 return 1;
247 }
248
249 struct efifb_mode_fixup {
250 unsigned int width;
251 unsigned int height;
252 unsigned int linelength;
253 };
254
255 static int __init
efifb_check_and_swap_width_height(const struct dmi_system_id * id)256 efifb_check_and_swap_width_height(const struct dmi_system_id *id)
257 {
258 const struct efifb_mode_fixup *data = id->driver_data;
259 struct screen_info *si = &sysfb_primary_display.screen;
260
261 if (data->width == si->lfb_width && data->height == si->lfb_height) {
262 swap(si->lfb_width, si->lfb_height);
263 si->lfb_linelength = data->linelength;
264 si->lfb_size = data->linelength * data->width;
265 }
266
267 return 1;
268 }
269
270 static const struct efifb_mode_fixup efifb_steamdeck_mode_fixup __initconst = {
271 .width = 1280,
272 .height = 800,
273 .linelength = 3328,
274 };
275
276 /*
277 * Some devices have a portrait LCD but advertise a landscape resolution (and
278 * pitch). We simply swap width and height for these devices so that we can
279 * correctly deal with some of them coming with multiple resolutions.
280 */
281 static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
282 {
283 /*
284 * Lenovo MIIX310-10ICR, only some batches have the troublesome
285 * 800x1280 portrait screen. Luckily the portrait version has
286 * its own BIOS version, so we match on that.
287 */
288 .matches = {
289 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
290 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR"),
291 DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1HCN44WW"),
292 },
293 .callback = efifb_swap_width_height,
294 },
295 {
296 /* Lenovo MIIX 320-10ICR with 800x1280 portrait screen */
297 .matches = {
298 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
299 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
300 "Lenovo MIIX 320-10ICR"),
301 },
302 .callback = efifb_swap_width_height,
303 },
304 {
305 /* Lenovo D330 with 800x1280 or 1200x1920 portrait screen */
306 .matches = {
307 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
308 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
309 "Lenovo ideapad D330-10IGM"),
310 },
311 .callback = efifb_swap_width_height,
312 },
313 {
314 /* Lenovo IdeaPad Duet 3 10IGL5 with 1200x1920 portrait screen */
315 .matches = {
316 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
317 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
318 "IdeaPad Duet 3 10IGL5"),
319 },
320 .callback = efifb_swap_width_height,
321 },
322 {
323 /* Lenovo Yoga Book X91F / X91L */
324 .matches = {
325 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
326 /* Non exact match to match F + L versions */
327 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91"),
328 },
329 .callback = efifb_swap_width_height,
330 },
331 {
332 /* Valve Steam Deck (Jupiter) */
333 .matches = {
334 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Valve"),
335 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Jupiter"),
336 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "1"),
337 },
338 .callback = efifb_check_and_swap_width_height,
339 .driver_data = (void *)&efifb_steamdeck_mode_fixup,
340 },
341 {
342 /* Valve Steam Deck (Galileo) */
343 .matches = {
344 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Valve"),
345 DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Galileo"),
346 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "1"),
347 },
348 .callback = efifb_check_and_swap_width_height,
349 .driver_data = (void *)&efifb_steamdeck_mode_fixup,
350 },
351 {},
352 };
353
efifb_overlaps_pci_range(const struct screen_info * si,const struct of_pci_range * range)354 static bool efifb_overlaps_pci_range(const struct screen_info *si,
355 const struct of_pci_range *range)
356 {
357 u64 fb_base = si->lfb_base;
358
359 if (si->capabilities & VIDEO_CAPABILITY_64BIT_BASE)
360 fb_base |= (u64)(unsigned long)si->ext_lfb_base << 32;
361
362 return fb_base >= range->cpu_addr &&
363 fb_base < (range->cpu_addr + range->size);
364 }
365
find_pci_overlap_node(void)366 static struct device_node *find_pci_overlap_node(void)
367 {
368 struct device_node *np;
369
370 for_each_node_by_type(np, "pci") {
371 struct of_pci_range_parser parser;
372 struct of_pci_range range;
373 int err;
374
375 err = of_pci_range_parser_init(&parser, np);
376 if (err) {
377 pr_warn("of_pci_range_parser_init() failed: %d\n", err);
378 continue;
379 }
380
381 for_each_of_pci_range(&parser, &range)
382 if (efifb_overlaps_pci_range(&sysfb_primary_display.screen, &range))
383 return np;
384 }
385 return NULL;
386 }
387
388 /*
389 * If the efifb framebuffer is backed by a PCI graphics controller, we have
390 * to ensure that this relation is expressed using a device link when
391 * running in DT mode, or the probe order may be reversed, resulting in a
392 * resource reservation conflict on the memory window that the efifb
393 * framebuffer steals from the PCIe host bridge.
394 */
efifb_add_links(struct fwnode_handle * fwnode)395 static int efifb_add_links(struct fwnode_handle *fwnode)
396 {
397 struct device_node *sup_np;
398
399 sup_np = find_pci_overlap_node();
400
401 /*
402 * If there's no PCI graphics controller backing the efifb, we are
403 * done here.
404 */
405 if (!sup_np)
406 return 0;
407
408 fwnode_link_add(fwnode, of_fwnode_handle(sup_np), 0);
409 of_node_put(sup_np);
410
411 return 0;
412 }
413
414 static const struct fwnode_operations efifb_fwnode_ops = {
415 .add_links = efifb_add_links,
416 };
417
418 static struct fwnode_handle efifb_fwnode;
419
sysfb_apply_efi_quirks(struct screen_info * si)420 __init void sysfb_apply_efi_quirks(struct screen_info *si)
421 {
422 if (si->orig_video_isVGA != VIDEO_TYPE_EFI ||
423 !(si->capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
424 dmi_check_system(efifb_dmi_system_table);
425
426 if (si->orig_video_isVGA == VIDEO_TYPE_EFI)
427 dmi_check_system(efifb_dmi_swap_width_height);
428 }
429
sysfb_set_efifb_fwnode(const struct screen_info * si,struct platform_device * pd)430 __init void sysfb_set_efifb_fwnode(const struct screen_info *si, struct platform_device *pd)
431 {
432 if (si->orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
433 fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
434 pd->dev.fwnode = &efifb_fwnode;
435 }
436 }
437 #endif
438