[PATCH] ALSA: hda/realtek: Add quirk for IPASON SmartBook S1 (ALC256, SSID 0x2782:0x0206)

[PATCH] ALSA: hda/realtek: Add quirk for IPASON SmartBook S1 (ALC256, SSID 0x2782:0x0206)

[周建宇]

Hi,

The internal speaker on the IPASON SmartBook S1 (an Emdoor ODM laptop)
is completely silent under Linux. Bluetooth audio works, and the same
machine's speaker works fine under Windows 11 / Windows PE with the
vendor Realtek driver, so the hardware and amplifier are all good.

Root cause (found):
-------------------
The BIOS reports the real internal speaker pin, NID 0x1b, with
Pin Default 0x411111f0 (DefAssociation = 0xf, i.e. "unconnected").
ALSA's pin parser therefore drops that node at pin-config time: no
mixer control is ever created and the pin is never driven, no matter
how 0x14 is configured. Enabling 0x1b produces sound immediately.

The existing model=alc256-honor-mrb-xxx-m1020-audio makes the speaker
work because it is an HDA_FIXUP_PINS that also rewrites 0x1b to
0x90170110, but it additionally rewrites 0x19 and 0x1a with Honor-
specific values that add a bogus "Dock Mic" device that does not exist
on this hardware. A minimal two-pin override is preferable.

Hardware:
- Codec: Realtek ALC256 (0x10ec0256), SSID 0x2782:0x0206
- Controller: Intel Tiger Lake-LP SST 8086:a0c8
- BIOS init pin configs:
   0x12 0x90a60130  0x13 0x40000000  0x14 0x90170110  0x18 0x411111f0
   0x19 0x02a19040  0x1a 0x411111f0  0x1b 0x411111f0  0x1d 0x4067b945
   0x1e 0x411111f0  0x21 0x02214020

Proposed fix:
-------------
I do not have a kernel git tree at hand to produce a proper unified
diff; the two hunks below are the exact entries to add. Please let me
know if you need a formal patch.

     SND_PCI_QUIRK(0x2782, 0x0206, "IPASON SmartBook S1",
                   ALC256_FIXUP_IPASON_SMARTBOOK_S1),

     [ALC256_FIXUP_IPASON_SMARTBOOK_S1] = {
         .type = HDA_FIXUP_PINS,
         .v.pins = (const struct hda_pintbl[]) {
             { 0x14, 0x90170111 },
             { 0x1b, 0x90170110 },   /* the real internal speaker */
             { }
         },
     },

Verified on kernel 7.2.0-1-MANJARO (also reproduced on 6.18.45-1-MANJARO),
in both the SOF and legacy HDA driver paths.

alsa-info output:
https://alsa-project.org/db/?f=4c555d942f5cef14cac55e34b2236238ae909af3

Happy to test any patch and provide further hda-verb dumps on request.

Signed-off-by: 周建宇 <997536907@qq.com>