[Bug 273809] Thinkpad T430 headphones don't work

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273809

--- Comment #8 from Jason W. Bacon <jwb@freebsd.org> ---
(In reply to Oleksandr Kryvulia from comment #7)

Looking at /usr/src/sys/dev/sound/pci/hda/pin_patch_realtek.h, it appears that
this patch will also impact T430S, X230, X230T, and T431S.  Can we be sure that
they all use nid=21, as=1, and seq=15?

                        }, {
                                .models = (struct pin_machine_model_t[]){
                                        PIN_SUBVENDOR(LENOVO_T430_SUBVENDOR),
                                        PIN_SUBVENDOR(LENOVO_T430S_SUBVENDOR),
                                        PIN_SUBVENDOR(LENOVO_X230_SUBVENDOR),
                                        PIN_SUBVENDOR(LENOVO_X230T_SUBVENDOR),
                                        PIN_SUBVENDOR(LENOVO_T431S_SUBVENDOR),
                                        { }
                                },
                                .pin_patches = (struct pin_patch_t[]){
                                        PIN_PATCH_DOCK_MIC_IN(25),
                                        PIN_PATCH_DOCK_HP(27),
                                        // Patch added here
                                        // PIN_PATCH_STRING(21, "as=1 seq=15"),
                                        { }
                                }
                        },

I'd have to do some research to understand what all these parameters mean.  The
simple fact that they are grouped together in the .models field might imply
that they use identical hardware, but I don't want to assume that given my
meager knowledge of audio devices.

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