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mb/asus/p8z77-m: Support AC97 front audio panel

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Add a nvram option for front audio panel type.

If it is set to AC97, reprogram front line out and microphone
pins to match vendor firmware under same configuration.

TEST=On asus/p8z77-m housed in an AOpen H340D case with an AC97
front audio panel, front panel line out port is now available as
headphone port in Fedora 39 with this patch applied and option
set correctly. And it works. Without the patch (or with this option
set to HD Audio), front audio ports are completely inoperable.

Change-Id: I39ccf066d87c5744a697599861719182768e0728
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79734
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nicholas Chin <nic.c3.14@gmail.com>
This commit is contained in:
Keith Hui 2023-12-26 16:33:57 -05:00 committed by Felix Singer
parent ca3764ab18
commit 8869414105
3 changed files with 42 additions and 0 deletions
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1
src/mainboard/asus/p8x7x-series/variants/p8z77-m/cmos.default
View File

@ -9,3 +9,4 @@ sata_mode=AHCI
usb3_mode=Enable
usb3_drv=Enable
usb3_streams=Enable
audio_panel_type=HDA

9
src/mainboard/asus/p8x7x-series/variants/p8z77-m/cmos.layout
View File

@ -51,6 +51,11 @@ entries
#
424 1 e 1 usb3_streams
# audio_panel_type
# HD Audio or AC'97
#
425 1 e 9 audio_panel_type
# -----------------------------------------------------------------
# Sandy/Ivy Bridge MRC Scrambler Seed values
# note: MUST NOT be covered by checksum!
@ -128,6 +133,10 @@ enumerations
8 2 Auto
8 3 SmartAuto
# audio_panel_type
9 0 HDA
9 1 AC97
# -----------------------------------------------------------------
# <startBit[must be byte-aligned]> <endBit[must be byte aligned]>
# <bit where to start storing checksum[must be 16bits-aligned]>

32
src/mainboard/asus/p8x7x-series/variants/p8z77-m/hda_verb.c
View File

@ -1,6 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <device/azalia_device.h>
#include <stdint.h>
#include <option.h>
const u32 cim_verb_data[] = {
0x10ec0887, /* Codec Vendor / Device ID: Realtek */
@ -34,3 +37,32 @@ const u32 cim_verb_data[] = {
const u32 pc_beep_verbs[0] = {};
AZALIA_ARRAY_SIZES;
void mainboard_azalia_program_runtime_verbs(u8 *base, u32 viddid)
{
unsigned int ac97 = get_uint_option("audio_panel_type", 0) & 0x1;
/*
* The verbs above are for a HD Audio front panel.
* With vendor firmware, if audio front panel type is set as AC97, line out 2
* (0x1b) and mic 2 (0x19) pins of ALC887 are configured differently.
*
* The differences are all in the "Misc" fields of configuration defaults (in byte 2)
* as shown below. ALC887 datasheet did not offer details on what those bits
* (listed as reserved in HDA spec) are, so we'll have to take their word for it.
*
* Pin | 0x19 | 0x1b
* -----+------+-----
* HDA | 1100 | 1100
* AC97 | 1001 | 0001
*/
const u32 verbs[] = {
AZALIA_VERB_12B(0, 0x19, 0x71d, 0x99),
AZALIA_VERB_12B(0, 0x1b, 0x71d, 0x41)
};
if ((viddid == 0x10ec0887) && ac97) {
azalia_program_verb_table(base, verbs, ARRAY_SIZE(verbs));
}
}