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c766264e0e
[ Upstream commit 47f56e38a1 ]
Add members to struct snd_soc_card to store the PCI subsystem ID (SSID)
of the soundcard.
The PCI specification provides two registers to store a vendor-specific
SSID that can be read by drivers to uniquely identify a particular
"soundcard". This is defined in the PCI specification to distinguish
products that use the same silicon (and therefore have the same silicon
ID) so that product-specific differences can be applied.
PCI only defines 0xFFFF as an invalid value. 0x0000 is not defined as
invalid. So the usual pattern of zero-filling the struct and then
assuming a zero value unset will not work. A flag is included to
indicate when the SSID information has been filled in.
Unlike DMI information, which has a free-format entirely up to the vendor,
the PCI SSID has a strictly defined format and a registry of vendor IDs.
It is usual in Windows drivers that the SSID is used as the sole identifier
of the specific end-product and the Windows driver contains tables mapping
that to information about the hardware setup, rather than using ACPI
properties.
This SSID is important information for ASoC components that need to apply
hardware-specific configuration on PCI-based systems.
As the SSID is a generic part of the PCI specification and is treated as
identifying the "soundcard", it is reasonable to include this information
in struct snd_soc_card, instead of components inventing their own custom
ways to pass this information around.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230912163207.3498161-2-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
126 lines
3.4 KiB
C
126 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* soc-card.h
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*
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* Copyright (C) 2019 Renesas Electronics Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*/
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#ifndef __SOC_CARD_H
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#define __SOC_CARD_H
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enum snd_soc_card_subclass {
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SND_SOC_CARD_CLASS_ROOT = 0,
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SND_SOC_CARD_CLASS_RUNTIME = 1,
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};
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static inline void snd_soc_card_mutex_lock_root(struct snd_soc_card *card)
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{
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mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_ROOT);
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}
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static inline void snd_soc_card_mutex_lock(struct snd_soc_card *card)
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{
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mutex_lock_nested(&card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
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}
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static inline void snd_soc_card_mutex_unlock(struct snd_soc_card *card)
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{
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mutex_unlock(&card->mutex);
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}
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struct snd_kcontrol *snd_soc_card_get_kcontrol(struct snd_soc_card *soc_card,
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const char *name);
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int snd_soc_card_jack_new(struct snd_soc_card *card, const char *id, int type,
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struct snd_soc_jack *jack);
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int snd_soc_card_jack_new_pins(struct snd_soc_card *card, const char *id,
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int type, struct snd_soc_jack *jack,
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struct snd_soc_jack_pin *pins,
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unsigned int num_pins);
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int snd_soc_card_suspend_pre(struct snd_soc_card *card);
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int snd_soc_card_suspend_post(struct snd_soc_card *card);
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int snd_soc_card_resume_pre(struct snd_soc_card *card);
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int snd_soc_card_resume_post(struct snd_soc_card *card);
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int snd_soc_card_probe(struct snd_soc_card *card);
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int snd_soc_card_late_probe(struct snd_soc_card *card);
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void snd_soc_card_fixup_controls(struct snd_soc_card *card);
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int snd_soc_card_remove(struct snd_soc_card *card);
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int snd_soc_card_set_bias_level(struct snd_soc_card *card,
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struct snd_soc_dapm_context *dapm,
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enum snd_soc_bias_level level);
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int snd_soc_card_set_bias_level_post(struct snd_soc_card *card,
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struct snd_soc_dapm_context *dapm,
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enum snd_soc_bias_level level);
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int snd_soc_card_add_dai_link(struct snd_soc_card *card,
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struct snd_soc_dai_link *dai_link);
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void snd_soc_card_remove_dai_link(struct snd_soc_card *card,
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struct snd_soc_dai_link *dai_link);
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#ifdef CONFIG_PCI
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static inline void snd_soc_card_set_pci_ssid(struct snd_soc_card *card,
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unsigned short vendor,
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unsigned short device)
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{
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card->pci_subsystem_vendor = vendor;
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card->pci_subsystem_device = device;
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card->pci_subsystem_set = true;
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}
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static inline int snd_soc_card_get_pci_ssid(struct snd_soc_card *card,
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unsigned short *vendor,
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unsigned short *device)
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{
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if (!card->pci_subsystem_set)
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return -ENOENT;
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*vendor = card->pci_subsystem_vendor;
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*device = card->pci_subsystem_device;
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return 0;
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}
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#else /* !CONFIG_PCI */
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static inline void snd_soc_card_set_pci_ssid(struct snd_soc_card *card,
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unsigned short vendor,
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unsigned short device)
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{
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}
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static inline int snd_soc_card_get_pci_ssid(struct snd_soc_card *card,
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unsigned short *vendor,
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unsigned short *device)
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{
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return -ENOENT;
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}
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#endif /* CONFIG_PCI */
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/* device driver data */
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static inline void snd_soc_card_set_drvdata(struct snd_soc_card *card,
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void *data)
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{
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card->drvdata = data;
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}
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static inline void *snd_soc_card_get_drvdata(struct snd_soc_card *card)
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{
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return card->drvdata;
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}
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static inline
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struct snd_soc_dai *snd_soc_card_get_codec_dai(struct snd_soc_card *card,
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const char *dai_name)
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{
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struct snd_soc_pcm_runtime *rtd;
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for_each_card_rtds(card, rtd) {
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if (!strcmp(asoc_rtd_to_codec(rtd, 0)->name, dai_name))
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return asoc_rtd_to_codec(rtd, 0);
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}
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return NULL;
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}
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#endif /* __SOC_CARD_H */
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