forked from Minki/linux
cddcd5472a
A user reports functional regression for Mackie Onyx 1640i that the device
generates slow sound with ALSA oxfw driver which supports media clock
recovery. Although the device is based on OXFW971 ASIC, it does not
transfer isochronous packet with own event frequency as expected. The
device seems to adjust event frequency according to events in received
isochronous packets in the beginning of packet streaming. This is
unknown quirk.
This commit fixes the regression to turn the recovery off in driver
side. As a result, nominal frequency is used in duplex packet streaming
between device and driver. For stability of sampling rate in events of
transferred isochronous packet, 4,000 isochronous packets are skipped
in the beginning of packet streaming.
Reference: https://github.com/takaswie/snd-firewire-improve/issues/38
Fixes: 029ffc4294 ("ALSA: oxfw: perform sequence replay for media clock recovery")
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20211028130325.45772-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
162 lines
5.2 KiB
C
162 lines
5.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* oxfw.h - a part of driver for OXFW970/971 based devices
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*
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* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
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*/
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#include <linux/device.h>
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#include <linux/firewire.h>
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#include <linux/firewire-constants.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/compat.h>
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#include <linux/sched/signal.h>
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#include <sound/control.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/info.h>
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#include <sound/rawmidi.h>
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#include <sound/firewire.h>
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#include <sound/hwdep.h>
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#include "../lib.h"
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#include "../fcp.h"
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#include "../packets-buffer.h"
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#include "../iso-resources.h"
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#include "../amdtp-am824.h"
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#include "../cmp.h"
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enum snd_oxfw_quirk {
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// Postpone transferring packets during handling asynchronous transaction. As a result,
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// next isochronous packet includes more events than one packet can include.
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SND_OXFW_QUIRK_JUMBO_PAYLOAD = 0x01,
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// The dbs field of CIP header in tx packet is wrong.
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SND_OXFW_QUIRK_WRONG_DBS = 0x02,
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// Blocking transmission mode is used.
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SND_OXFW_QUIRK_BLOCKING_TRANSMISSION = 0x04,
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// Stanton SCS1.d and SCS1.m support unique transaction.
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SND_OXFW_QUIRK_SCS_TRANSACTION = 0x08,
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// Apogee Duet FireWire ignores data blocks in packet with NO_INFO for audio data
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// processing, while output level meter moves. Any value in syt field of packet takes
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// the device to process audio data even if the value is invalid in a point of
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// IEC 61883-1/6.
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SND_OXFW_QUIRK_IGNORE_NO_INFO_PACKET = 0x10,
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// Loud Technologies Mackie Onyx 1640i seems to configure OXFW971 ASIC so that it decides
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// event frequency according to events in received isochronous packets. The device looks to
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// performs media clock recovery voluntarily. In the recovery, the packets with NO_INFO
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// are ignored, thus driver should transfer packets with timestamp.
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SND_OXFW_QUIRK_VOLUNTARY_RECOVERY = 0x20,
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};
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/* This is an arbitrary number for convinience. */
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#define SND_OXFW_STREAM_FORMAT_ENTRIES 10
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struct snd_oxfw {
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struct snd_card *card;
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struct fw_unit *unit;
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struct mutex mutex;
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spinlock_t lock;
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// The combination of snd_oxfw_quirk enumeration-constants.
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unsigned int quirks;
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bool has_output;
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bool has_input;
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u8 *tx_stream_formats[SND_OXFW_STREAM_FORMAT_ENTRIES];
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u8 *rx_stream_formats[SND_OXFW_STREAM_FORMAT_ENTRIES];
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bool assumed;
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struct cmp_connection out_conn;
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struct cmp_connection in_conn;
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struct amdtp_stream tx_stream;
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struct amdtp_stream rx_stream;
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unsigned int substreams_count;
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unsigned int midi_input_ports;
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unsigned int midi_output_ports;
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int dev_lock_count;
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bool dev_lock_changed;
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wait_queue_head_t hwdep_wait;
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void *spec;
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struct amdtp_domain domain;
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};
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/*
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* AV/C Stream Format Information Specification 1.1 Working Draft
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* (Apr 2005, 1394TA)
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*/
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int avc_stream_set_format(struct fw_unit *unit, enum avc_general_plug_dir dir,
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unsigned int pid, u8 *format, unsigned int len);
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int avc_stream_get_format(struct fw_unit *unit,
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enum avc_general_plug_dir dir, unsigned int pid,
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u8 *buf, unsigned int *len, unsigned int eid);
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static inline int
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avc_stream_get_format_single(struct fw_unit *unit,
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enum avc_general_plug_dir dir, unsigned int pid,
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u8 *buf, unsigned int *len)
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{
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return avc_stream_get_format(unit, dir, pid, buf, len, 0xff);
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}
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static inline int
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avc_stream_get_format_list(struct fw_unit *unit,
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enum avc_general_plug_dir dir, unsigned int pid,
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u8 *buf, unsigned int *len,
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unsigned int eid)
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{
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return avc_stream_get_format(unit, dir, pid, buf, len, eid);
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}
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/*
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* AV/C Digital Interface Command Set General Specification 4.2
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* (Sep 2004, 1394TA)
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*/
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int avc_general_inquiry_sig_fmt(struct fw_unit *unit, unsigned int rate,
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enum avc_general_plug_dir dir,
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unsigned short pid);
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int snd_oxfw_stream_init_duplex(struct snd_oxfw *oxfw);
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int snd_oxfw_stream_reserve_duplex(struct snd_oxfw *oxfw,
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struct amdtp_stream *stream,
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unsigned int rate, unsigned int pcm_channels,
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unsigned int frames_per_period,
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unsigned int frames_per_buffer);
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int snd_oxfw_stream_start_duplex(struct snd_oxfw *oxfw);
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void snd_oxfw_stream_stop_duplex(struct snd_oxfw *oxfw);
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void snd_oxfw_stream_destroy_duplex(struct snd_oxfw *oxfw);
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void snd_oxfw_stream_update_duplex(struct snd_oxfw *oxfw);
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struct snd_oxfw_stream_formation {
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unsigned int rate;
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unsigned int pcm;
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unsigned int midi;
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};
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int snd_oxfw_stream_parse_format(u8 *format,
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struct snd_oxfw_stream_formation *formation);
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int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw,
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enum avc_general_plug_dir dir,
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struct snd_oxfw_stream_formation *formation);
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int snd_oxfw_stream_discover(struct snd_oxfw *oxfw);
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void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw);
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int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw);
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void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw);
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int snd_oxfw_create_pcm(struct snd_oxfw *oxfw);
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void snd_oxfw_proc_init(struct snd_oxfw *oxfw);
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int snd_oxfw_create_midi(struct snd_oxfw *oxfw);
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int snd_oxfw_create_hwdep(struct snd_oxfw *oxfw);
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int snd_oxfw_add_spkr(struct snd_oxfw *oxfw, bool is_lacie);
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int snd_oxfw_scs1x_add(struct snd_oxfw *oxfw);
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void snd_oxfw_scs1x_update(struct snd_oxfw *oxfw);
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