6cc7e93f46
Dell's laptops Inspiron 3500, Inspiron 3501, Inspiron 3505 are using Cirrus Logic CS8409 HDA bridge with CS42L42 companion codec. The CS8409 is a multichannel HD audio routing controller. CS8409 includes support for four channels of digital microphone data and two bidirectional ASPs for up to 32 channels of TDM data or 4 channels of I2S data. The CS8409 is intended to be used with a remote companion codec that implements high performance analog functions in close physical proximity to the end-equipment audio port or speaker driver. The CS42L42 is a low-power audio codec with integrated MIPI SoundWire interface or I2C/I2S/TDM interfaces designed for portable applications. It provides a high-dynamic range, stereo DAC for audio playback and a mono high-dynamic-range ADC for audio capture CS42L42 is connected to CS8409 HDA bridge via I2C and I2S. CS8409 CS42L42 ------- -------- ASP1.A TX --> ASP_SDIN ASP1.A RX <-- ASP_SDOUT GPIO5 --> RST# GPIO4 <-- INT# GPIO3 <-- WAKE# GPIO7 <-> I2C SDA GPIO6 --> I2C CLK Tested on DELL Inspiron-3500, DELL Inspiron-3501, DELL Inspiron-3505 This patch will register CS8409 with sound card and create input/output paths and two input devices, initialise CS42L42 companion codec and configure it for ASP TX/RX TDM mode, 24bit, 48kHz. cat /proc/asound/pcm 00-00: CS8409 Analog : CS8409 Analog : playback 1 : capture 1 00-03: HDMI 0 : HDMI 0 : playback 1 dmesg snd_hda_codec_cirrus hdaudioC0D0: autoconfig for CS8409: line_outs=1 (0x2c/0x0/0x0/0x0/0x0) type:speaker snd_hda_codec_cirrus hdaudioC0D0: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0) snd_hda_codec_cirrus hdaudioC0D0: hp_outs=1 (0x24/0x0/0x0/0x0/0x0) snd_hda_codec_cirrus hdaudioC0D0: mono: mono_out=0x0 snd_hda_codec_cirrus hdaudioC0D0: inputs: snd_hda_codec_cirrus hdaudioC0D0: Internal Mic=0x44 snd_hda_codec_cirrus hdaudioC0D0: Mic=0x34 input: HDA Intel PCH Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input8 input: HDA Intel PCH Headset Mic as /devices/pci0000:00/0000:00:1f.3/sound/card0/input9 Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com> Link: https://lore.kernel.org/r/20210306111934.4832-3-vitalyr@opensource.cirrus.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.