summaryrefslogtreecommitdiffstats
path: root/drivers/firmware/efi/sysfb_efi.c
blob: 4c7c9dd7733f92a8c2c9e7d15badb92289003e58 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Generic System Framebuffers
 * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com>
 *
 * EFI Quirks Copyright (c) 2006 Edgar Hucek <gimli@dark-green.com>
 */

/*
 * EFI Quirks
 * Several EFI systems do not correctly advertise their boot framebuffers.
 * Hence, we use this static table of known broken machines and fix up the
 * information so framebuffer drivers can load correctly.
 */

#include <linux/dmi.h>
#include <linux/err.h>
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/of_address.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>
#include <linux/sysfb.h>
#include <video/vga.h>

#include <asm/efi.h>

enum {
	OVERRIDE_NONE = 0x0,
	OVERRIDE_BASE = 0x1,
	OVERRIDE_STRIDE = 0x2,
	OVERRIDE_HEIGHT = 0x4,
	OVERRIDE_WIDTH = 0x8,
};

struct efifb_dmi_info efifb_dmi_list[] = {
	[M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
	[M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
	[M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
	[M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
	[M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
	[M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
	[M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
	[M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
	[M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
	[M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
	[M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
	[M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
	[M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
	[M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
	[M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
	/* 11" Macbook Air 3,1 passes the wrong stride */
	[M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
	[M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
	[M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
	[M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
	[M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
	[M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
	[M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
	[M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
	[M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
	[M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
	[M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
	[M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
	[M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
	[M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
};

void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
{
	int i;

	for (i = 0; i < M_UNKNOWN; i++) {
		if (efifb_dmi_list[i].base != 0 &&
		    !strcmp(opt, efifb_dmi_list[i].optname)) {
			si->lfb_base = efifb_dmi_list[i].base;
			si->lfb_linelength = efifb_dmi_list[i].stride;
			si->lfb_width = efifb_dmi_list[i].width;
			si->lfb_height = efifb_dmi_list[i].height;
		}
	}
}

#define choose_value(dmivalue, fwvalue, field, flags) ({	\
		typeof(fwvalue) _ret_ = fwvalue;		\
		if ((flags) & (field))				\
			_ret_ = dmivalue;			\
		else if ((fwvalue) == 0)			\
			_ret_ = dmivalue;			\
		_ret_;						\
	})

static int __init efifb_set_system(const struct dmi_system_id *id)
{
	struct efifb_dmi_info *info = id->driver_data;

	if (info->base == 0 && info->height == 0 && info->width == 0 &&
	    info->stride == 0)
		return 0;

	/* Trust the bootloader over the DMI tables */
	if (screen_info.lfb_base == 0) {
#if defined(CONFIG_PCI)
		struct pci_dev *dev = NULL;
		int found_bar = 0;
#endif
		if (info->base) {
			screen_info.lfb_base = choose_value(info->base,
				screen_info.lfb_base, OVERRIDE_BASE,
				info->flags);

#if defined(CONFIG_PCI)
			/* make sure that the address in the table is actually
			 * on a VGA device's PCI BAR */

			for_each_pci_dev(dev) {
				int i;
				if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
					continue;
				for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
					resource_size_t start, end;
					unsigned long flags;

					flags = pci_resource_flags(dev, i);
					if (!(flags & IORESOURCE_MEM))
						continue;

					if (flags & IORESOURCE_UNSET)
						continue;

					if (pci_resource_len(dev, i) == 0)
						continue;

					start = pci_resource_start(dev, i);
					end = pci_resource_end(dev, i);
					if (screen_info.lfb_base >= start &&
					    screen_info.lfb_base < end) {
						found_bar = 1;
						break;
					}
				}
			}
			if (!found_bar)
				screen_info.lfb_base = 0;
#endif
		}
	}
	if (screen_info.lfb_base) {
		screen_info.lfb_linelength = choose_value(info->stride,
			screen_info.lfb_linelength, OVERRIDE_STRIDE,
			info->flags);
		screen_info.lfb_width = choose_value(info->width,
			screen_info.lfb_width, OVERRIDE_WIDTH,
			info->flags);
		screen_info.lfb_height = choose_value(info->height,
			screen_info.lfb_height, OVERRIDE_HEIGHT,
			info->flags);
		if (screen_info.orig_video_isVGA == 0)
			screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
	} else {
		screen_info.lfb_linelength = 0;
		screen_info.lfb_width = 0;
		screen_info.lfb_height = 0;
		screen_info.orig_video_isVGA = 0;
		return 0;
	}

	printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
			 "(%dx%d, stride %d)\n", id->ident,
			 screen_info.lfb_base, screen_info.lfb_width,
			 screen_info.lfb_height, screen_info.lfb_linelength);

	return 1;
}

#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid)		\
	{							\
		efifb_set_system,				\
		name,						\
		{						\
			DMI_MATCH(DMI_BIOS_VENDOR, vendor),	\
			DMI_MATCH(DMI_PRODUCT_NAME, name)	\
		},						\
		&efifb_dmi_list[enumid]				\
	}

static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
	/* At least one of these two will be right; maybe both? */
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
	/* At least one of these two will be right; maybe both? */
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
	/* At least one of these two will be right; maybe both? */
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
	/* At least one of these two will be right; maybe both? */
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
	EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
	EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
	{},
};

/*
 * Some devices have a portrait LCD but advertise a landscape resolution (and
 * pitch). We simply swap width and height for these devices so that we can
 * correctly deal with some of them coming with multiple resolutions.
 */
static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
	{
		/*
		 * Lenovo MIIX310-10ICR, only some batches have the troublesome
		 * 800x1280 portrait screen. Luckily the portrait version has
		 * its own BIOS version, so we match on that.
		 */
		.matches = {
			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
			DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR"),
			DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1HCN44WW"),
		},
	},
	{
		/* Lenovo MIIX 320-10ICR with 800x1280 portrait screen */
		.matches = {
			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
			DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
					"Lenovo MIIX 320-10ICR"),
		},
	},
	{
		/* Lenovo D330 with 800x1280 or 1200x1920 portrait screen */
		.matches = {
			DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
			DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
					"Lenovo ideapad D330-10IGM"),
		},
	},
	{},
};

static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
{
	u64 fb_base = screen_info.lfb_base;

	if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
		fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;

	return fb_base >= range->cpu_addr &&
	       fb_base < (range->cpu_addr + range->size);
}

static struct device_node *find_pci_overlap_node(void)
{
	struct device_node *np;

	for_each_node_by_type(np, "pci") {
		struct of_pci_range_parser parser;
		struct of_pci_range range;
		int err;

		err = of_pci_range_parser_init(&parser, np);
		if (err) {
			pr_warn("of_pci_range_parser_init() failed: %d\n", err);
			continue;
		}

		for_each_of_pci_range(&parser, &range)
			if (efifb_overlaps_pci_range(&range))
				return np;
	}
	return NULL;
}

/*
 * If the efifb framebuffer is backed by a PCI graphics controller, we have
 * to ensure that this relation is expressed using a device link when
 * running in DT mode, or the probe order may be reversed, resulting in a
 * resource reservation conflict on the memory window that the efifb
 * framebuffer steals from the PCIe host bridge.
 */
static int efifb_add_links(struct fwnode_handle *fwnode)
{
	struct device_node *sup_np;

	sup_np = find_pci_overlap_node();

	/*
	 * If there's no PCI graphics controller backing the efifb, we are
	 * done here.
	 */
	if (!sup_np)
		return 0;

	fwnode_link_add(fwnode, of_fwnode_handle(sup_np));
	of_node_put(sup_np);

	return 0;
}

static const struct fwnode_operations efifb_fwnode_ops = {
	.add_links = efifb_add_links,
};

#ifdef CONFIG_EFI
static struct fwnode_handle efifb_fwnode;

__init void sysfb_apply_efi_quirks(struct platform_device *pd)
{
	if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
	    !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
		dmi_check_system(efifb_dmi_system_table);

	if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
	    dmi_check_system(efifb_dmi_swap_width_height)) {
		u16 temp = screen_info.lfb_width;

		screen_info.lfb_width = screen_info.lfb_height;
		screen_info.lfb_height = temp;
		screen_info.lfb_linelength = 4 * screen_info.lfb_width;
	}

	if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
		fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
		pd->dev.fwnode = &efifb_fwnode;
	}
}
#endif