summaryrefslogtreecommitdiff
path: root/config/coreboot/default/patches/0020-mb-dell-Add-Latitude-E6420-Sandy-Bridge.patch
blob: 2f6629b2a190e2df9583fa94d8d5a8e5f0562caa (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
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
From 5d8a651a71d19918130f58c637700539dd320789 Mon Sep 17 00:00:00 2001
From: Nicholas Chin <nic.c3.14@gmail.com>
Date: Sun, 26 Nov 2023 17:08:52 -0700
Subject: [PATCH 20/39] mb/dell: Add Latitude E6420 (Sandy Bridge)

Mainboard is PAL50/LA-6591P (UMA). The version with an Nvidia dGPU was
not tested. I do not physically have this system; someone with physical
access to one sent me the output of autoport which I then modified to
produce this port. I was also sent the VBT binary, which was obtained
from `/sys/kernel/debug/dri/0/i915_vbt` while running version A25 of the
vendor firmware.

This was originally tested and found to be working as a standalone board
port in Libreboot, but this variant based port in upstream coreboot has
not been tested.

This can be internally flashed by sending a command to the EC, which
causes the EC to pull the FDO pin low and the firmware to skip setting
up any chipset based write protections [1]. The EC is the SMSC MEC5055,
which seems to be compatible with the existing MEC5035 code.

[1] https://gitlab.com/nic3-14159/dell-flash-unlock

Change-Id: Ic48d9ea58172a5b13958c8afebcb19c8929c4394
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
---
 src/mainboard/dell/snb_ivb_latitude/Kconfig   |  13 +-
 .../dell/snb_ivb_latitude/Kconfig.name        |   3 +
 .../snb_ivb_latitude/variants/e6420/data.vbt  | Bin 0 -> 6144 bytes
 .../variants/e6420/early_init.c               |  14 ++
 .../snb_ivb_latitude/variants/e6420/gpio.c    | 191 ++++++++++++++++++
 .../variants/e6420/hda_verb.c                 |  32 +++
 .../variants/e6420/overridetree.cb            |  35 ++++
 7 files changed, 287 insertions(+), 1 deletion(-)
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6420/data.vbt
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6420/early_init.c
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6420/gpio.c
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6420/hda_verb.c
 create mode 100644 src/mainboard/dell/snb_ivb_latitude/variants/e6420/overridetree.cb

diff --git a/src/mainboard/dell/snb_ivb_latitude/Kconfig b/src/mainboard/dell/snb_ivb_latitude/Kconfig
index 183a67bec3..d2786970ee 100644
--- a/src/mainboard/dell/snb_ivb_latitude/Kconfig
+++ b/src/mainboard/dell/snb_ivb_latitude/Kconfig
@@ -17,6 +17,12 @@ config BOARD_DELL_SNB_IVB_LATITUDE_COMMON
 	select SYSTEM_TYPE_LAPTOP
 	select USE_NATIVE_RAMINIT
 
+config BOARD_DELL_LATITUDE_E6420
+	select BOARD_DELL_SNB_IVB_LATITUDE_COMMON
+	select BOARD_ROMSIZE_KB_10240
+	select MAINBOARD_USES_IFD_GBE_REGION
+	select SOUTHBRIDGE_INTEL_BD82X6X
+
 config BOARD_DELL_LATITUDE_E5530
 	select BOARD_DELL_SNB_IVB_LATITUDE_COMMON
 	select BOARD_ROMSIZE_KB_12288
@@ -43,6 +49,7 @@ config MAINBOARD_DIR
 	default "dell/snb_ivb_latitude"
 
 config MAINBOARD_PART_NUMBER
+	default "Latitude E6420" if BOARD_DELL_LATITUDE_E6420
 	default "Latitude E5530" if BOARD_DELL_LATITUDE_E5530
 	default "Latitude E6430" if BOARD_DELL_LATITUDE_E6430
 	default "Latitude E6530" if BOARD_DELL_LATITUDE_E6530
@@ -54,11 +61,15 @@ config USBDEBUG_HCD_INDEX
 	default 2
 
 config VARIANT_DIR
+	default "e6420" if BOARD_DELL_LATITUDE_E6420
 	default "e5530" if BOARD_DELL_LATITUDE_E5530
 	default "e6430" if BOARD_DELL_LATITUDE_E6430
 	default "e6530" if BOARD_DELL_LATITUDE_E6530
 
 config VGA_BIOS_ID
-	default "8086,0166"
+	default "8086,0166" if BOARD_DELL_LATITUDE_E5530
+	default "8086,0126" if BOARD_DELL_LATITUDE_E6420
+	default "8086,0166" if BOARD_DELL_LATITUDE_E6430 \
+		|| BOARD_DELL_LATITUDE_E6530
 
 endif
diff --git a/src/mainboard/dell/snb_ivb_latitude/Kconfig.name b/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
index c15ef4028f..257d428a70 100644
--- a/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
+++ b/src/mainboard/dell/snb_ivb_latitude/Kconfig.name
@@ -1,5 +1,8 @@
 ## SPDX-License-Identifier: GPL-2.0-only
 
+config BOARD_DELL_LATITUDE_E6420
+	bool "Latitude E6420"
+
 config BOARD_DELL_LATITUDE_E5530
 	bool "Latitude E5530"
 
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6420/data.vbt b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/data.vbt
new file mode 100644
index 0000000000000000000000000000000000000000..d3662eea1bc78b60be6d0bd2cc38bb46b654afbd
GIT binary patch
literal 6144
zcmeHKeQZ-z6hE);wSBvNZ|mO1=*HLC2BQN8uVX6{N9eY)75ORymb$R8!YYuAZEgeE
zKk|S@Fen*n41W-viAF;r%)~^EkpLz-B{2q##)LmGAtoY;7*Qhv_1yPbw$TC$2}G0K
z=6Ao&x#ym9?z!i_&TOh(kLzky2cN8MTpny#R<;VU4Rkn?rBIz(YL~BBw<%b&zGhSH
z$~AQ>@D0d=Xx6RE0BwSxspWdrW9y<FZGD@&x3_JL;p$p!;!BVdcKLkht0=-%(Jj&T
z_GkyztZ%>#t7^)^(T-R<7W?O6ZTI%A+j=`<Jw3Q%dk6N!da<_?7oyiU3)^<~_TiSk
zE$y+=RK3PGQ`gzmXYPRBx>C|f*UP9{h|4>ANrAe~?ymV*)83AaT#FuTjP=C2cg5P~
zt4w78r$t#300cWY_k)mevmAmFI3&oBfytoAAPQiYK$XEIgHwV@5-gJ-Q-*p8yfTDj
zaDz=1Y!X1B3`OpQ&Ik}bM|0xHn0gYNZw0rT=7AXS2in-q8K^?)0|el+Z6geW7i7MM
zv~!|>HqL-|Fk}EYOa@)R<X)VQ7c}d8R1b@RTn5rq(90|QRg0?wwZZz(6Dz}w>zg9Y
z8;!mD_V*XSjT33~$`o`s>zEGBq8AQ`HaH?y!Fh2QiX1v@aCo4LaENf&DZ_cE2A2qb
z5@cC}X)=S^1RvpXLWs~v*hqMau$!=t@B-mg!XV)|;eEm>!Z6`H;R4|&!d1d`f|S7^
zli+B98*!TfPE&6~NVM5j3v{N3OTjpnm_L@BPh(}esd(J!gj?~iJP?n|OZZOiTqlql
zg<NWR@g&-*W-E%A7|*1Z_`sVO$K&iAP+VIj9{<1hT%SXsK}IBk8!daftR`6-)EUiS
zvv*HR(#-ZwhA~7wcmxbe4%E?Y7P0y{1q|nqR1L29UR8v@#No^g5MH)7!>{%-$T|cR
zZx5|xm>Fl>;@$m};P{0WC>O~<Nl1`*PLgPN_hP2a^h+L$ls&SYrkDYr+&l*%%S?^Q
ziPSdtHE<LNEnr7cs=ihL-C>-p>*$9CpHRLgN|POkqD^UP4nw|4nf0bc8MOBk<;%js
zfpCAWNzqSPlz@X%j9CGrwZDKUl@K{g6pzqiIIARDQ)#@^RW&0pmNG;XZ?!SlHB?L#
zKRAMgq(R;aQd%@Gy38-LS@ix)fR**(P3B9wI=Uk^&cWmmwB<vf21<0#LBA!;qtAh(
zYe5g_T{+gw^mi8QzPPraBoH~8oCz%r=$nVi1A)`Y8IKqIdqm6MihqxtpFaTggaPxu
zQP07nf#&kPkPp}Cmk$F1g7q7QK;kz~80i&oDN}~wYbPUI6AtG5H+$T!@f5FzUhp21
z^XiPT3rb%B@sA9g!n88R7BOsLS|?+D3}0v3dyIX|@JFWo&e%<c#V)PV#g@7-=F*;V
zvAr&Q+ogTvVxPM3XP5Smi`f;Nt7uCU)}Y`HMcbpW=M_AuXlE35PQl+4O{7m66&I@7
zGL@}Sai^*sP}va`KTx$VRQ8REf2*1+lTFH0=UkNx+eN|1rVyipl)Du=h=@%w+iQZG
zT6@-PdW^oyFb44AG`HMZWEnP{&OQ+jC`N4emoS)x;EPN}uaSFOf-Mn8JRRO&LTWJc
zn6%=L94~PR)%Ua_HTZcfTXD<p{%8p|<N<;Efw$Zb4$}{m8@7c((~<7^thaau&@Wx#
zVGNL)lmH@{o=h*{muXGc!;nXrVgpp3;1V1stMj=4AtxyzX+?SoB~zN}!*r?9Qvs1P
zmV_(CTmt0sY&6=F=_M>E34GYvuh1uQF+BUdWyQC5SaEM1QvKlHBMs13C}n{0SwRxW
ziekMa&kvRFruRcKCevGy5)TxUBDlur@E{TtQ^NQ>nO+Cgl)&Ga(PxqVW?e3TLH-UY
zdL3T{z^xdd`$(STFUb8R*cKa}r>n{Wk+MXRH~o-hN}#9OF*>T#>rfhiRs(Wc-R^9@
z%F=<}dn(E}ADc03zJ>JvZe;_8f+WFLL4%qNYs`_aa`a$Pl5H;iO^Wt*cP3W(d=(g}
zZ%nKT1$|r-tAv8($u2-BI2Uiz#%OT&!Q3b~Ru2P2j;Gem!@wfPsTR%J>W{8z)oq^J
k^Qm&?O@bFkw4CTocwoW<6CRlGz=Q`TJTT#bN9KWl0rH4|j{pDw

literal 0
HcmV?d00001

diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6420/early_init.c b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/early_init.c
new file mode 100644
index 0000000000..ff83db095b
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/early_init.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include <device/pci_ops.h>
+#include <ec/dell/mec5035/mec5035.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+
+void bootblock_mainboard_early_init(void)
+{
+	pci_write_config16(PCH_LPC_DEV, LPC_EN, CNF1_LPC_EN | MC_LPC_EN
+			| KBC_LPC_EN | FDD_LPC_EN | LPT_LPC_EN
+			| COMB_LPC_EN | COMA_LPC_EN);
+	mec5035_early_init();
+}
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6420/gpio.c b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/gpio.c
new file mode 100644
index 0000000000..943c743f48
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/gpio.c
@@ -0,0 +1,191 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <southbridge/intel/common/gpio.h>
+
+static const struct pch_gpio_set1 pch_gpio_set1_mode = {
+	.gpio0 = GPIO_MODE_GPIO,
+	.gpio1 = GPIO_MODE_NATIVE,
+	.gpio2 = GPIO_MODE_GPIO,
+	.gpio3 = GPIO_MODE_NATIVE,
+	.gpio4 = GPIO_MODE_GPIO,
+	.gpio5 = GPIO_MODE_NATIVE,
+	.gpio6 = GPIO_MODE_GPIO,
+	.gpio7 = GPIO_MODE_GPIO,
+	.gpio8 = GPIO_MODE_GPIO,
+	.gpio9 = GPIO_MODE_NATIVE,
+	.gpio10 = GPIO_MODE_NATIVE,
+	.gpio11 = GPIO_MODE_NATIVE,
+	.gpio12 = GPIO_MODE_NATIVE,
+	.gpio13 = GPIO_MODE_GPIO,
+	.gpio14 = GPIO_MODE_GPIO,
+	.gpio15 = GPIO_MODE_GPIO,
+	.gpio16 = GPIO_MODE_GPIO,
+	.gpio17 = GPIO_MODE_GPIO,
+	.gpio18 = GPIO_MODE_NATIVE,
+	.gpio19 = GPIO_MODE_GPIO,
+	.gpio20 = GPIO_MODE_NATIVE,
+	.gpio21 = GPIO_MODE_GPIO,
+	.gpio22 = GPIO_MODE_GPIO,
+	.gpio23 = GPIO_MODE_NATIVE,
+	.gpio24 = GPIO_MODE_GPIO,
+	.gpio25 = GPIO_MODE_NATIVE,
+	.gpio26 = GPIO_MODE_NATIVE,
+	.gpio27 = GPIO_MODE_GPIO,
+	.gpio28 = GPIO_MODE_GPIO,
+	.gpio29 = GPIO_MODE_GPIO,
+	.gpio30 = GPIO_MODE_GPIO,
+	.gpio31 = GPIO_MODE_GPIO,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_direction = {
+	.gpio0 = GPIO_DIR_INPUT,
+	.gpio2 = GPIO_DIR_INPUT,
+	.gpio4 = GPIO_DIR_INPUT,
+	.gpio6 = GPIO_DIR_INPUT,
+	.gpio7 = GPIO_DIR_INPUT,
+	.gpio8 = GPIO_DIR_INPUT,
+	.gpio13 = GPIO_DIR_INPUT,
+	.gpio14 = GPIO_DIR_INPUT,
+	.gpio15 = GPIO_DIR_INPUT,
+	.gpio16 = GPIO_DIR_INPUT,
+	.gpio17 = GPIO_DIR_INPUT,
+	.gpio19 = GPIO_DIR_INPUT,
+	.gpio21 = GPIO_DIR_INPUT,
+	.gpio22 = GPIO_DIR_INPUT,
+	.gpio24 = GPIO_DIR_INPUT,
+	.gpio27 = GPIO_DIR_INPUT,
+	.gpio28 = GPIO_DIR_INPUT,
+	.gpio29 = GPIO_DIR_INPUT,
+	.gpio30 = GPIO_DIR_OUTPUT,
+	.gpio31 = GPIO_DIR_INPUT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_level = {
+	.gpio30 = GPIO_LEVEL_HIGH,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_reset = {
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_invert = {
+	.gpio0 = GPIO_INVERT,
+	.gpio8 = GPIO_INVERT,
+	.gpio14 = GPIO_INVERT,
+};
+
+static const struct pch_gpio_set1 pch_gpio_set1_blink = {
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_mode = {
+	.gpio32 = GPIO_MODE_NATIVE,
+	.gpio33 = GPIO_MODE_GPIO,
+	.gpio34 = GPIO_MODE_GPIO,
+	.gpio35 = GPIO_MODE_GPIO,
+	.gpio36 = GPIO_MODE_GPIO,
+	.gpio37 = GPIO_MODE_GPIO,
+	.gpio38 = GPIO_MODE_GPIO,
+	.gpio39 = GPIO_MODE_GPIO,
+	.gpio40 = GPIO_MODE_NATIVE,
+	.gpio41 = GPIO_MODE_NATIVE,
+	.gpio42 = GPIO_MODE_NATIVE,
+	.gpio43 = GPIO_MODE_NATIVE,
+	.gpio44 = GPIO_MODE_NATIVE,
+	.gpio45 = GPIO_MODE_GPIO,
+	.gpio46 = GPIO_MODE_NATIVE,
+	.gpio47 = GPIO_MODE_NATIVE,
+	.gpio48 = GPIO_MODE_GPIO,
+	.gpio49 = GPIO_MODE_GPIO,
+	.gpio50 = GPIO_MODE_NATIVE,
+	.gpio51 = GPIO_MODE_GPIO,
+	.gpio52 = GPIO_MODE_GPIO,
+	.gpio53 = GPIO_MODE_NATIVE,
+	.gpio54 = GPIO_MODE_GPIO,
+	.gpio55 = GPIO_MODE_NATIVE,
+	.gpio56 = GPIO_MODE_NATIVE,
+	.gpio57 = GPIO_MODE_GPIO,
+	.gpio58 = GPIO_MODE_NATIVE,
+	.gpio59 = GPIO_MODE_NATIVE,
+	.gpio60 = GPIO_MODE_GPIO,
+	.gpio61 = GPIO_MODE_NATIVE,
+	.gpio62 = GPIO_MODE_NATIVE,
+	.gpio63 = GPIO_MODE_NATIVE,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_direction = {
+	.gpio33 = GPIO_DIR_INPUT,
+	.gpio34 = GPIO_DIR_OUTPUT,
+	.gpio35 = GPIO_DIR_INPUT,
+	.gpio36 = GPIO_DIR_INPUT,
+	.gpio37 = GPIO_DIR_INPUT,
+	.gpio38 = GPIO_DIR_INPUT,
+	.gpio39 = GPIO_DIR_INPUT,
+	.gpio45 = GPIO_DIR_OUTPUT,
+	.gpio48 = GPIO_DIR_INPUT,
+	.gpio49 = GPIO_DIR_OUTPUT,
+	.gpio51 = GPIO_DIR_INPUT,
+	.gpio52 = GPIO_DIR_INPUT,
+	.gpio54 = GPIO_DIR_INPUT,
+	.gpio57 = GPIO_DIR_INPUT,
+	.gpio60 = GPIO_DIR_OUTPUT,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_level = {
+	.gpio34 = GPIO_LEVEL_HIGH,
+	.gpio45 = GPIO_LEVEL_LOW,
+	.gpio49 = GPIO_LEVEL_LOW,
+	.gpio60 = GPIO_LEVEL_HIGH,
+};
+
+static const struct pch_gpio_set2 pch_gpio_set2_reset = {
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_mode = {
+	.gpio64 = GPIO_MODE_NATIVE,
+	.gpio65 = GPIO_MODE_NATIVE,
+	.gpio66 = GPIO_MODE_NATIVE,
+	.gpio67 = GPIO_MODE_NATIVE,
+	.gpio68 = GPIO_MODE_GPIO,
+	.gpio69 = GPIO_MODE_GPIO,
+	.gpio70 = GPIO_MODE_GPIO,
+	.gpio71 = GPIO_MODE_GPIO,
+	.gpio72 = GPIO_MODE_NATIVE,
+	.gpio73 = GPIO_MODE_NATIVE,
+	.gpio74 = GPIO_MODE_NATIVE,
+	.gpio75 = GPIO_MODE_NATIVE,
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_direction = {
+	.gpio68 = GPIO_DIR_INPUT,
+	.gpio69 = GPIO_DIR_INPUT,
+	.gpio70 = GPIO_DIR_INPUT,
+	.gpio71 = GPIO_DIR_INPUT,
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_level = {
+};
+
+static const struct pch_gpio_set3 pch_gpio_set3_reset = {
+};
+
+const struct pch_gpio_map mainboard_gpio_map = {
+	.set1 = {
+		.mode		= &pch_gpio_set1_mode,
+		.direction	= &pch_gpio_set1_direction,
+		.level		= &pch_gpio_set1_level,
+		.blink		= &pch_gpio_set1_blink,
+		.invert		= &pch_gpio_set1_invert,
+		.reset		= &pch_gpio_set1_reset,
+	},
+	.set2 = {
+		.mode		= &pch_gpio_set2_mode,
+		.direction	= &pch_gpio_set2_direction,
+		.level		= &pch_gpio_set2_level,
+		.reset		= &pch_gpio_set2_reset,
+	},
+	.set3 = {
+		.mode		= &pch_gpio_set3_mode,
+		.direction	= &pch_gpio_set3_direction,
+		.level		= &pch_gpio_set3_level,
+		.reset		= &pch_gpio_set3_reset,
+	},
+};
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6420/hda_verb.c b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/hda_verb.c
new file mode 100644
index 0000000000..ede8445aaf
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/hda_verb.c
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/azalia_device.h>
+
+const u32 cim_verb_data[] = {
+	0x111d76e7,	/* Codec Vendor / Device ID: IDT */
+	0x10280493,	/* Subsystem ID */
+	11,		/* Number of 4 dword sets */
+	AZALIA_SUBVENDOR(0, 0x10280493),
+	AZALIA_PIN_CFG(0, 0x0a, 0x03a11020),
+	AZALIA_PIN_CFG(0, 0x0b, 0x0321101f),
+	AZALIA_PIN_CFG(0, 0x0c, 0x400000f0),
+	AZALIA_PIN_CFG(0, 0x0d, 0x90170110),
+	AZALIA_PIN_CFG(0, 0x0e, 0x23011050),
+	AZALIA_PIN_CFG(0, 0x0f, 0x23a1102e),
+	AZALIA_PIN_CFG(0, 0x10, 0x400000f3),
+	AZALIA_PIN_CFG(0, 0x11, 0xd5a30130),
+	AZALIA_PIN_CFG(0, 0x1f, 0x400000f0),
+	AZALIA_PIN_CFG(0, 0x20, 0x400000f0),
+
+	0x80862805,	/* Codec Vendor / Device ID: Intel */
+	0x80860101,	/* Subsystem ID */
+	4,		/* Number of 4 dword sets */
+	AZALIA_SUBVENDOR(3, 0x80860101),
+	AZALIA_PIN_CFG(3, 0x05, 0x18560010),
+	AZALIA_PIN_CFG(3, 0x06, 0x18560020),
+	AZALIA_PIN_CFG(3, 0x07, 0x18560030),
+};
+
+const u32 pc_beep_verbs[0] = {};
+
+AZALIA_ARRAY_SIZES;
diff --git a/src/mainboard/dell/snb_ivb_latitude/variants/e6420/overridetree.cb b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/overridetree.cb
new file mode 100644
index 0000000000..3012a3177f
--- /dev/null
+++ b/src/mainboard/dell/snb_ivb_latitude/variants/e6420/overridetree.cb
@@ -0,0 +1,35 @@
+## SPDX-License-Identifier: GPL-2.0-or-later
+
+chip northbridge/intel/sandybridge
+	device domain 0 on
+		subsystemid 0x1028 0x0493 inherit
+
+		device ref igd on
+			register "gpu_cpu_backlight" = "0x0000054f"
+			register "gpu_pch_backlight" = "0x13121312"
+		end
+
+		chip southbridge/intel/bd82x6x
+			register "usb_port_config" = "{
+				{ 1, 1, 0 },
+				{ 1, 1, 0 },
+				{ 1, 1, 1 },
+				{ 1, 1, 1 },
+				{ 1, 0, 2 },
+				{ 1, 1, 2 },
+				{ 1, 1, 3 },
+				{ 1, 1, 3 },
+				{ 1, 1, 5 },
+				{ 1, 1, 5 },
+				{ 1, 1, 7 },
+				{ 1, 1, 6 },
+				{ 1, 0, 6 },
+				{ 1, 0, 7 },
+			}"
+
+			device ref sata1 on
+				register "sata_port_map" = "0x3b"
+			end
+		end
+	end
+end
-- 
2.39.2