How can I check if the sound card of my laptop, a Dell XPS 13 (2015) (9343), is loaded in HDA mode or in I2S mode?According to ArchWiki, that laptop has a dual-mode sound cardHardware:[mattia@arch-xps ~]$ lspci -nn00:00.0 Host bridge [0600]: Intel Corporation Broadwell-U Host Bridge-OPI [8086:1604] (rev 09)00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 5500 [8086:1616] (rev 09)00:03.0 Audio device [0403]: Intel Corporation Broadwell-U Audio Controller [8086:160c] (rev 09)00:04.0 Signal processing controller [1180]: Intel Corporation Broadwell-U Processor Thermal Subsystem [8086:1603] (rev 09)00:14.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB xHCI Controller [8086:9cb1] (rev 03)00:16.0 Communication controller [0780]: Intel Corporation Wildcat Point-LP MEI Controller #1 [8086:9cba] (rev 03)00:1b.0 Audio device [0403]: Intel Corporation Wildcat Point-LP High Definition Audio Controller [8086:9ca0] (rev 03)00:1c.0 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #1 [8086:9c90] (rev e3)00:1c.3 PCI bridge [0604]: Intel Corporation Wildcat Point-LP PCI Express Root Port #4 [8086:9c96] (rev e3)00:1d.0 USB controller [0c03]: Intel Corporation Wildcat Point-LP USB EHCI Controller [8086:9ca6] (rev 03)00:1f.0 ISA bridge [0601]: Intel Corporation Wildcat Point-LP LPC Controller [8086:9cc3] (rev 03)00:1f.2 SATA controller [0106]: Intel Corporation Wildcat Point-LP SATA Controller [AHCI Mode] [8086:9c83] (rev 03)00:1f.3 SMBus [0c05]: Intel Corporation Wildcat Point-LP SMBus Controller [8086:9ca2] (rev 03)00:1f.6 Signal processing controller [1180]: Intel Corporation Wildcat Point-LP Thermal Management Controller [8086:9ca4] (rev 03)01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5249 PCI Express Card Reader [10ec:5249] (rev 01)02:00.0 Network controller [0280]: Broadcom Limited BCM4352 802.11ac Wireless Network Adapter [14e4:43b1] (rev 03)Dmesg:[mattia@arch-xps ~]$ dmesg[    0.000000] microcode: microcode updated early to revision 0x25, date = 2017-01-27[    0.000000] Linux version 4.11.5-2-ck (mattia@arch-xps) (gcc version 7.1.1 20170516 (GCC) ) #1 SMP PREEMPT Thu Jun 15 18:44:16 CEST 2017[    0.000000] Command line: initrd=\intel-ucode.img initrd=\initramfs-linux-ck.img root=PARTUUID=3a0ebdfc-e32f-4a35-a482-35dcfd8ee34a resume=PARTUUID=18f13113-dc7f-4138-8084-4e4a67c581ba elevator=bfq nowatchdog rw[    0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'[    0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'[    0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'[    0.000000] x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256[    0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.[    0.000000] e820: BIOS-provided physical RAM map:...[    1.134601] input: AT Translated Set 2 keyboard as /devices/platform/i8042/serio0/input/input0[    1.134898] xhci_hcd 0000:00:14.0: xHCI Host Controller[    1.134905] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2[    1.135992] xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version 0x100 quirks 0x0004b810[    1.135998] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported[    1.136266] hub 2-0:1.0: USB hub found[    1.136284] hub 2-0:1.0: 11 ports detected[    1.140057] xhci_hcd 0000:00:14.0: xHCI Host Controller[    1.140061] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 3[    1.140221] hub 3-0:1.0: USB hub found[    1.140235] hub 3-0:1.0: 4 ports detected[    1.141794] ahci 0000:00:1f.2: version 3.0[    1.141964] ahci 0000:00:1f.2: SSS flag set, parallel bus scan disabled[    1.152044] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 4 ports 6 Gbps 0x8 impl SATA mode[    1.152047] ahci 0000:00:1f.2: flags: 64bit ncq stag pm led clo only pio slum part deso sadm sds apst [    1.152452] scsi host0: ahci[    1.152598] scsi host1: ahci[    1.152697] scsi host2: ahci[    1.152789] scsi host3: ahci[    1.152825] ata1: DUMMY[    1.152826] ata2: DUMMY[    1.152826] ata3: DUMMY[    1.152828] ata4: SATA max UDMA/133 abar m2048@0xf7422000 port 0xf7422280 irq 46[    1.480802] ata4: SATA link up 6.0 Gbps (SStatus 133 SControl 300)[    1.483284] ata4.00: NCQ Send/Recv Log not supported[    1.483290] ata4.00: ATA-9: SAMSUNG SSD PM851 M.2 2280 256GB, EXT25D0Q, max UDMA/133[    1.483294] ata4.00: 500118192 sectors, multi 16: LBA48 NCQ (depth 31/32), AA[    1.484011] ata4.00: NCQ Send/Recv Log not supported[    1.484068] ata4.00: configured for UDMA/133[    1.484431] scsi 3:0:0:0: Direct-Access     ATA      SAMSUNG SSD PM85 5D0Q PQ: 0 ANSI: 5[    1.487748] usb 1-1: new high-speed USB device number 2 using ehci-pci[    1.507784] usb 2-1: new full-speed USB device number 2 using xhci_hcd[    1.564223] sd 3:0:0:0: [sda] 500118192 512-byte logical blocks: (256 GB/238 GiB)[    1.564249] sd 3:0:0:0: [sda] Write Protect is off[    1.564254] sd 3:0:0:0: [sda] Mode Sense: 00 3a 00 00[    1.564306] sd 3:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA[    1.567449]  sda: sda1 sda2 sda3 sda4[    1.567749] sd 3:0:0:0: [sda] Attached SCSI disk[    1.652454] hub 1-1:1.0: USB hub found[    1.652622] hub 1-1:1.0: 8 ports detected[    1.658128] PM: Starting manual resume from disk[    1.658131] PM: Hibernation image partition 8:2 present[    1.658132] PM: Looking for hibernation image.[    1.658305] PM: Image not found (code -22)[    1.658306] PM: Hibernation image not present or could not be loaded.[    1.679878] random: fast init done[    1.731749] EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null)[    1.808971] ip_tables: (C) 2000-2006 Netfilter Core Team[    1.813785] systemd[1]: systemd 232 running in system mode. (+PAM -AUDIT -SELINUX -IMA -APPARMOR +SMACK -SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)[    1.813932] systemd[1]: Detected architecture x86-64.[    1.814557] systemd[1]: Set hostname to <arch-xps>.[    1.817732] usb 2-3: new full-speed USB device number 3 using xhci_hcd[    1.882521] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.[    1.883233] systemd[1]: Created slice User and Session Slice.[    1.883333] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.[    1.883425] systemd[1]: Listening on Journal Socket (/dev/log).[    1.883514] systemd[1]: Started Forward Password Requests to Wall Directory Watch.[    1.883602] systemd[1]: Listening on Device-mapper event daemon FIFOs.[    1.883690] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.[    1.901987] EXT4-fs (sda3): re-mounted. Opts: discard,data=ordered[    2.030202] input: Lid Switch as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input2[    2.030783] ACPI: Lid Switch [LID0][    2.030854] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input3[    2.030857] ACPI: Power Button [PBTN][    2.031841] ACPI: AC Adapter [AC] (off-line)[    2.033912] proc_thermal 0000:00:04.0: enabling device (0000 -> 0002)[    2.035422] input: Sleep Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input4[    2.035428] ACPI: Sleep Button [SBTN][    2.035539] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input5[    2.035542] ACPI: Power Button [PWRF][    2.044011] ACPI Warning: \_SB.IETM._ART: Return Package type mismatch at index 0 - found Integer, expected Reference (20170119/nspredef-297)[    2.044021] ACPI: Invalid package element [0]: got number, expecting [R][    2.044022] _ART package 0 is invalid, ignored[    2.097729] tsc: Refined TSC clocksource calibration: 2194.918 MHz[    2.097734] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x1fa37202099, max_idle_ns: 440795206796 ns[    2.102435] systemd-journald[185]: Received request to flush runtime journal from PID 1[    2.137774] usb 2-5: new high-speed USB device number 4 using xhci_hcd[    2.199459] hidraw: raw HID events driver (C) Jiri Kosina[    2.200577] (NULL device *): hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().[    2.202927] thermal LNXTHERM:00: registered as thermal_zone7[    2.202929] ACPI: Thermal Zone [THM] (25 C)[    2.204142] wmi: Mapper loaded[    2.212758] thermal LNXTHERM:01: registered as thermal_zone8[    2.212760] ACPI: Thermal Zone [TZ00] (34 C)[    2.222982] thermal LNXTHERM:02: registered as thermal_zone9[    2.222984] ACPI: Thermal Zone [TZ01] (34 C)[    2.231379] ACPI: Battery Slot [BAT0] (battery present)[    2.298443] shpchp: Standard Hot Plug PCI Controller Driver version: 0.4[    2.338464] i801_smbus 0000:00:1f.3: SPD Write Disable is set[    2.338539] i801_smbus 0000:00:1f.3: SMBus using PCI interrupt[    2.348705] intel_pch_thermal 0000:00:1f.6: enabling device (0000 -> 0002)[    2.348941] (NULL device *): hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().[    2.349005] snd_hda_intel 0000:00:03.0: enabling device (0000 -> 0002)[    2.349145] snd_hda_intel 0000:00:1b.0: enabling device (0000 -> 0002)[    2.361342] Adding 8911868k swap on /dev/sda2.  Priority:-1 extents:1 across:8911868k SSFS[    2.375421] snd_hda_codec_realtek hdaudioC1D0: autoconfig for ALC3263: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker[    2.375423] snd_hda_codec_realtek hdaudioC1D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)[    2.375425] snd_hda_codec_realtek hdaudioC1D0:    hp_outs=1 (0x21/0x0/0x0/0x0/0x0)[    2.375426] snd_hda_codec_realtek hdaudioC1D0:    mono: mono_out=0x0[    2.375428] snd_hda_codec_realtek hdaudioC1D0:    inputs:[    2.375430] snd_hda_codec_realtek hdaudioC1D0:      Headset Mic=0x18[    2.375432] snd_hda_codec_realtek hdaudioC1D0:      Headphone Mic=0x1a[    2.375433] snd_hda_codec_realtek hdaudioC1D0:      Internal Mic=0x12[    2.378024] input: PC Speaker as /devices/platform/pcspkr/input/input6[    2.393846] wl: loading out-of-tree module taints kernel.[    2.393849] wl: module license 'MIXED/Proprietary' taints kernel.[    2.393850] Disabling lock debugging due to kernel taint[    2.395919] RAPL PMU: API unit is 2^-32 Joules, 4 fixed counters, 655360 ms ovfl timer[    2.395921] RAPL PMU: hw unit of domain pp0-core 2^-14 Joules[    2.395922] RAPL PMU: hw unit of domain package 2^-14 Joules[    2.395922] RAPL PMU: hw unit of domain dram 2^-14 Joules[    2.395923] RAPL PMU: hw unit of domain pp1-gpu 2^-14 Joules[    2.396427] dcdbas dcdbas: Dell Systems Management Base Driver (version 5.6.0-3.2)[    2.404262] wl 0000:02:00.0: enabling device (0000 -> 0002)[    2.427078] AVX2 version of gcm_enc/dec engaged.[    2.427079] AES CTR mode by8 optimization enabled[    2.441627] random: crng init done[    2.452210] input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/sound/card1/input7[    2.452405] input: HDA Intel PCH Headphone Mic as /devices/pci0000:00/0000:00:1b.0/sound/card1/input9[    2.469884] wlan0: Broadcom BCM43b1 802.11 Hybrid Wireless Controller 6.30.223.271 (r587334)[    2.476553] [drm] Memory usable by graphics device = 4096M[    2.476556] checking generic (e0000000 7e9000) vs hw (e0000000 10000000)[    2.476557] fb: switching to inteldrmfb from EFI VGA[    2.476580] Console: switching to colour dummy device 80x25[    2.476687] [drm] Replacing VGA console driver[    2.477144] [drm] ACPI BIOS requests an excessive sleep of 25000 ms, using 1500 ms instead[    2.488089] EXT4-fs (sda4): mounted filesystem with ordered data mode. Opts: discard,data=ordered[    2.490303] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).[    2.490304] [drm] Driver supports precise vblank timestamp query.[    2.492246] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem[    2.499820] intel_rapl: Found RAPL domain package[    2.499823] intel_rapl: Found RAPL domain core[    2.499824] intel_rapl: Found RAPL domain uncore[    2.499825] intel_rapl: Found RAPL domain dram[    2.499830] intel_rapl: RAPL package 0 domain package locked by BIOS[    2.499835] intel_rapl: RAPL package 0 domain dram locked by BIOS[    2.502529] [drm] Initialized i915 1.6.0 20170123 for 0000:00:02.0 on minor 0[    2.503948] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)[    2.506665] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input10[    2.506995] snd_hda_intel 0000:00:03.0: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])[    2.507006] [drm] Initialized i915 1.6.0 20170123 for 0000:00:02.0 on minor 0[    2.604468] dell_wmi: Detected Dell WMI interface version 1[    2.604594] input: Dell WMI hotkeys as /devices/virtual/input/input11[    2.608888] input: DLL0665:01 06CB:76AD Touchpad as /devices/pci0000:00/INT3433:00/i2c-1/i2c-DLL0665:01/0018:06CB:76AD.0001/input/input13[    2.608965] hid-multitouch 0018:06CB:76AD.0001: input,hidraw0: I2C HID v1.00 Mouse [DLL0665:01 06CB:76AD] on i2c-DLL0665:01[    2.610405] wl 0000:02:00.0 wlp2s0: renamed from wlan0[    2.655707] mousedev: PS/2 mouse device common for all mice[    2.668750] fbcon: inteldrmfb (fb0) is primary device[    3.108005] clocksource: Switched to clocksource tsc[    3.426028] media: Linux media interface: v0.10[    3.431855] Linux video capture interface: v2.00[    3.435199] Bluetooth: Core ver 2.22[    3.435220] NET: Registered protocol family 31[    3.435220] Bluetooth: HCI device and connection manager initialized[    3.435223] Bluetooth: HCI socket layer initialized[    3.435225] Bluetooth: L2CAP socket layer initialized[    3.435230] Bluetooth: SCO socket layer initialized[    3.440625] usbcore: registered new interface driver btusb[    3.441768] dm9601 2-1:1.0 eth0: register 'dm9601' at usb-0000:00:14.0-1, Davicom DM96xx USB 10/100 Ethernet, 00:e0:4c:53:44:58[    3.441862] usbcore: registered new interface driver dm9601[    3.442095] uvcvideo: Found UVC 1.00 device Integrated_Webcam_HD (0bda:5682)[    3.443756] usbcore: registered new interface driver sr9700[    3.445335] dm9601 2-1:1.0 enp0s20u1: renamed from eth0[    3.451777] uvcvideo 2-5:1.0: Entity type for entity Extension 4 was not initialized![    3.451778] uvcvideo 2-5:1.0: Entity type for entity Extension 7 was not initialized![    3.451779] uvcvideo 2-5:1.0: Entity type for entity Processing 2 was not initialized![    3.451780] uvcvideo 2-5:1.0: Entity type for entity Camera 1 was not initialized![    3.451844] input: Integrated_Webcam_HD as /devices/pci0000:00/0000:00:14.0/usb2/2-5/2-5:1.0/input/input18[    3.451903] usbcore: registered new interface driver uvcvideo[    3.451904] USB Video Class driver (1.1.1)[    3.559500] Bluetooth: hci0: BCM: chip id 63[    3.575523] Bluetooth: hci0: BCM20702A[    3.576508] Bluetooth: hci0: BCM20702A1 (001.002.014) build 0000[    3.990327] Console: switching to colour frame buffer device 240x67[    4.011534] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device[    4.050380] input: HDA Intel HDMI HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:03.0/sound/card0/input19[    4.050444] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input20[    4.050503] input: HDA Intel HDMI HDMI/DP,pcm=8 as /devices/pci0000:00/0000:00:03.0/sound/card0/input21[    4.050562] input: HDA Intel HDMI HDMI/DP,pcm=9 as /devices/pci0000:00/0000:00:03.0/sound/card0/input22[    4.050649] input: HDA Intel HDMI HDMI/DP,pcm=10 as /devices/pci0000:00/0000:00:03.0/sound/card0/input23[    4.164982] Bluetooth: BNEP (Ethernet Emulation) ver 1.3[    4.164984] Bluetooth: BNEP filters: protocol multicast[    4.164988] Bluetooth: BNEP socket layer initialized[    4.338501] Bluetooth: hci0: BCM20702A1 (001.002.014) build 1572[    4.354498] Bluetooth: hci0: DW1560 Bluetooth 4.0 LE[    4.645255] IPv6: ADDRCONF(NETDEV_UP): enp0s20u1: link is not ready[    4.689285] dm9601 2-1:1.0 enp0s20u1: link up, 100Mbps, full-duplex, lpa 0xFFFF[    4.756496] dm9601 2-1:1.0 enp0s20u1: kevent 4 may have been dropped[    4.762065] IPv6: ADDRCONF(NETDEV_UP): wlp2s0: link is not ready[    4.767490] dm9601 2-1:1.0 enp0s20u1: kevent 4 may have been dropped[    4.799684] dm9601 2-1:1.0 enp0s20u1: link up, 100Mbps, full-duplex, lpa 0xFFFF[    4.887666] dm9601 2-1:1.0 enp0s20u1: link up, 100Mbps, full-duplex, lpa 0xFFFF[    6.711458] Bluetooth: RFCOMM TTY layer initialized[    6.711466] Bluetooth: RFCOMM socket layer initialized[    6.711475] Bluetooth: RFCOMM ver 1.11[    7.450784] TCP: request_sock_TCP: Possible SYN flooding on port 45265. Sending cookies.  Check SNMP counters.[   15.633644] fuse init (API version 7.26)
How to check if sound card is in HDA or I2S mode?
audio;hardware