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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3256be6537
This patch changes the sysfs files assigned to the codec device on the bus which were formerly identical with hwdep sysfs files. Now it shows only a few core parameter, vendor_id, subsystem_id, revision_id, afg, mfg, vendor_name and chip_name. In addition, now a widget tree is added to the bus device sysfs directory for showing the widget topology and attributes. It's just a flat tree consisting of subdirectories named as the widget NID including various attributes like widget capability bits. The AFG (usually NID 0x01) is always found there, and it contains always amp_in_caps, amp_out_caps and power_caps files. Each of these attributes show a single value. The rest are the widget nodes belonging to that AFG. Note that the child node might not start from 0x02 but from another value like 0x0a. Each child node may contain caps, pin_caps, amp_in_caps, amp_out_caps, power_caps and connections files. The caps (representing the widget capability bits) always contain a value. The rest may contain value(s) if the attribute exists on the node. Only connections file show multiple values while other attributes have zero or one single value. An example of ls -R output is like below: % ls -R /sys/bus/hdaudio/devices/hdaudioC0D0/ /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/: 01/ 04/ 07/ 0a/ 0d/ 10/ 13/ 16/ 19/ 1c/ 1f/ 22/ 02/ 05/ 08/ 0b/ 0e/ 11/ 14/ 17/ 1a/ 1d/ 20/ 23/ 03/ 06/ 09/ 0c/ 0f/ 12/ 15/ 18/ 1b/ 1e/ 21/ /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/01: amp_in_caps amp_out_caps power_caps /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/02: amp_in_caps amp_out_caps caps connections pin_caps pin_cfg power_caps /sys/bus/hdaudio/devices/hdaudioC0D0/widgets/03: ..... Signed-off-by: Takashi Iwai <tiwai@suse.de>
24 lines
618 B
C
24 lines
618 B
C
/*
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* Local helper macros and functions for HD-audio core drivers
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*/
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#ifndef __HDAC_LOCAL_H
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#define __HDAC_LOCAL_H
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#define get_wcaps(codec, nid) \
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snd_hdac_read_parm(codec, nid, AC_PAR_AUDIO_WIDGET_CAP)
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/* get the widget type from widget capability bits */
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static inline int get_wcaps_type(unsigned int wcaps)
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{
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if (!wcaps)
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return -1; /* invalid type */
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return (wcaps & AC_WCAP_TYPE) >> AC_WCAP_TYPE_SHIFT;
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}
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extern const struct attribute_group *hdac_dev_attr_groups[];
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int hda_widget_sysfs_init(struct hdac_device *codec);
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void hda_widget_sysfs_exit(struct hdac_device *codec);
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#endif /* __HDAC_LOCAL_H */
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