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efb6f3159e
For SoundWire support, we added a 'link_mask' to describe the PCB hardware layout. This helped form a signature that can be used as a first-order way of detecting the hardware and selecting the machine driver. The concept of link_mask is however not enough. Some BIOS enable all links, even when there are no devices physically connected. We can also see variations with multiple devices attached on one link, or different types of devices connected on the same link. To accurately represent the hardware, we need to build static tables where each link exposes a list of expected devices represented by the 64-bit _ADR field (which uniquely identifies each device). The new 'links' field is optional when the link_mask is sufficient to represent a platform in a unique way. The existing mechanism to support I2C devices is left as is, it'd be too invasive to change the existing support for _HID and the notion of link is not relevant either. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Bard liao <yung-chuan.liao@linux.intel.com> Link: https://lore.kernel.org/r/20200110222530.30303-2-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
146 lines
4.2 KiB
C
146 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright (C) 2013-15, Intel Corporation. All rights reserved.
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*/
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#ifndef __LINUX_SND_SOC_ACPI_H
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#define __LINUX_SND_SOC_ACPI_H
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#include <linux/stddef.h>
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#include <linux/acpi.h>
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#include <linux/mod_devicetable.h>
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struct snd_soc_acpi_package_context {
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char *name; /* package name */
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int length; /* number of elements */
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struct acpi_buffer *format;
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struct acpi_buffer *state;
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bool data_valid;
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};
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/* codec name is used in DAIs is i2c-<HID>:00 with HID being 8 chars */
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#define SND_ACPI_I2C_ID_LEN (4 + ACPI_ID_LEN + 3 + 1)
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#if IS_ENABLED(CONFIG_ACPI)
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/* acpi match */
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struct snd_soc_acpi_mach *
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snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines);
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bool snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
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struct snd_soc_acpi_package_context *ctx);
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/* check all codecs */
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struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg);
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#else
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/* acpi match */
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static inline struct snd_soc_acpi_mach *
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snd_soc_acpi_find_machine(struct snd_soc_acpi_mach *machines)
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{
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return NULL;
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}
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static inline bool
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snd_soc_acpi_find_package_from_hid(const u8 hid[ACPI_ID_LEN],
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struct snd_soc_acpi_package_context *ctx)
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{
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return false;
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}
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/* check all codecs */
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static inline struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg)
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{
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return NULL;
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}
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#endif
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/**
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* snd_soc_acpi_mach_params: interface for machine driver configuration
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*
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* @acpi_ipc_irq_index: used for BYT-CR detection
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* @platform: string used for HDaudio codec support
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* @codec_mask: used for HDAudio support
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* @common_hdmi_codec_drv: use commom HDAudio HDMI codec driver
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* @link_mask: links enabled on the board
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* @links: array of link _ADR descriptors, null terminated
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*/
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struct snd_soc_acpi_mach_params {
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u32 acpi_ipc_irq_index;
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const char *platform;
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u32 codec_mask;
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u32 dmic_num;
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bool common_hdmi_codec_drv;
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u32 link_mask;
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const struct snd_soc_acpi_link_adr *links;
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};
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/**
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* snd_soc_acpi_link_adr: ACPI-based list of _ADR, with a variable
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* number of devices per link
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*
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* @mask: one bit set indicates the link this list applies to
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* @num_adr: ARRAY_SIZE of adr
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* @adr: array of _ADR (represented as u64).
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*/
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struct snd_soc_acpi_link_adr {
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const u32 mask;
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const u32 num_adr;
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const u64 *adr;
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};
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/**
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* snd_soc_acpi_mach: ACPI-based machine descriptor. Most of the fields are
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* related to the hardware, except for the firmware and topology file names.
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* A platform supported by legacy and Sound Open Firmware (SOF) would expose
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* all firmware/topology related fields.
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*
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* @id: ACPI ID (usually the codec's) used to find a matching machine driver.
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* @link_mask: describes required board layout, e.g. for SoundWire.
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* @links: array of link _ADR descriptors, null terminated.
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* @drv_name: machine driver name
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* @fw_filename: firmware file name. Used when SOF is not enabled.
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* @board: board name
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* @machine_quirk: pointer to quirk, usually based on DMI information when
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* ACPI ID alone is not sufficient, wrong or misleading
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* @quirk_data: data used to uniquely identify a machine, usually a list of
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* audio codecs whose presence if checked with ACPI
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* @pdata: intended for platform data or machine specific-ops. This structure
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* is not constant since this field may be updated at run-time
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* @sof_fw_filename: Sound Open Firmware file name, if enabled
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* @sof_tplg_filename: Sound Open Firmware topology file name, if enabled
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*/
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/* Descriptor for SST ASoC machine driver */
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struct snd_soc_acpi_mach {
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const u8 id[ACPI_ID_LEN];
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const u32 link_mask;
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const struct snd_soc_acpi_link_adr *links;
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const char *drv_name;
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const char *fw_filename;
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const char *board;
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struct snd_soc_acpi_mach * (*machine_quirk)(void *arg);
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const void *quirk_data;
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void *pdata;
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struct snd_soc_acpi_mach_params mach_params;
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const char *sof_fw_filename;
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const char *sof_tplg_filename;
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};
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#define SND_SOC_ACPI_MAX_CODECS 3
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/**
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* struct snd_soc_acpi_codecs: Structure to hold secondary codec information
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* apart from the matched one, this data will be passed to the quirk function
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* to match with the ACPI detected devices
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*
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* @num_codecs: number of secondary codecs used in the platform
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* @codecs: holds the codec IDs
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*
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*/
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struct snd_soc_acpi_codecs {
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int num_codecs;
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u8 codecs[SND_SOC_ACPI_MAX_CODECS][ACPI_ID_LEN];
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};
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#endif
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