How to check if sound card is in HDA or I2S mode?

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 card Hardware: [mattia@arch-xps ~]$ lspci -nn 00:00.0 Host bridge : Intel Corporation Broadwell-U Host Bridge-OPI [8086:1604] (rev 09) 00:02.0 VGA compatible controller : Intel Corporation HD Graphics 5500 [8086:1616] (rev 09) 00:03.0 Audio device : Intel Corporation Broadwell-U Audio Controller [8086:160c] (rev 09) 00:04.0 Signal processing controller : 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 : Intel Corporation Wildcat Point-LP MEI Controller #1 [8086:9cba] (rev 03) 00:1b.0 Audio device : Intel Corporation Wildcat Point-LP High Definition Audio Controller [8086:9ca0] (rev 03) 00:1c.0 PCI bridge : Intel Corporation Wildcat Point-LP PCI Express Root Port #1 [8086:9c90] (rev e3) 00:1c.3 PCI bridge : 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 : Intel Corporation Wildcat Point-LP LPC Controller [8086:9cc3] (rev 03) 00:1f.2 SATA controller : 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 : 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 : 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: 576, xstate_sizes: 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 . [ 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 : 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: 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)