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8679284b37
The machine drivers may need information provided by the platform driver. Currently the information is passed using pdata specific to each plaform driver. This prevents other drivers, such as SOF, from reusing machine drivers directly. Add a new structure which contains the required fields. This proposal requires a bit more work on the platform side but this generic interface helps reuse code directly. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
111 lines
3.4 KiB
C
111 lines
3.4 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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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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#else
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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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#endif
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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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/**
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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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*/
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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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};
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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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* @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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* @asoc_plat_name: ASoC platform name, used for binding machine drivers
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* if non NULL
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* @new_mach_data: machine driver private data fixup
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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 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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const char *asoc_plat_name;
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struct platform_device * (*new_mach_data)(void *pdata);
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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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/* check all codecs */
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struct snd_soc_acpi_mach *snd_soc_acpi_codec_list(void *arg);
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#endif
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