April 2019 - Alsa-devel - mailman.alsa-project.org

[alsa-devel] [GIT PULL FOR v5.2] Media Device Allocator API
by Hans Verkuil 04 Apr '19

04 Apr '19

Hi Mauro, After five (!) years of work, this is finally ready to go in. Thank you Shuah for your perseverance! Regards, Hans The following changes since commit 1c3ec30bb23023d738b538e64ac3028902d53692: media: index.rst: exclude Indexes section from latex/pdf output (2019-03-30 09:42:35 -0400) are available in the Git repository at: git://linuxtv.org/hverkuil/media_tree.git tags/br-v5.2c3 for you to fetch changes up to 5ea25de43fd59a319136cf5b2e547ca315cfb212: au0828: stop video streaming only when last user stops (2019-04-03 09:01:15 +0200) ---------------------------------------------------------------- Tag branch ---------------------------------------------------------------- Hans Verkuil (1): au0828: stop video streaming only when last user stops Shuah Khan (8): media: Media Device Allocator API media: change au0828 to use Media Device Allocator API media: media.h: Enable ALSA MEDIA_INTF_T* interface types sound/usb: Use Media Controller API to share media resources au0828: fix enable and disable source audio and video inconsistencies selftests: media_dev_allocator api test au0828: Fix NULL pointer dereference in au0828_analog_stream_enable() media: Clear devnode->media_dev holding media_devnode_lock Documentation/media/kapi/mc-core.rst | 41 ++++++ drivers/media/Makefile | 6 + drivers/media/media-dev-allocator.c | 135 +++++++++++++++++ drivers/media/media-devnode.c | 3 +- drivers/media/usb/au0828/Kconfig | 2 + drivers/media/usb/au0828/au0828-core.c | 196 ++++++++++++++++++------ drivers/media/usb/au0828/au0828-video.c | 16 +- drivers/media/usb/au0828/au0828.h | 6 +- include/media/media-dev-allocator.h | 63 ++++++++ include/uapi/linux/media.h | 25 ++-- sound/usb/Kconfig | 4 + sound/usb/Makefile | 2 + sound/usb/card.c | 14 ++ sound/usb/card.h | 3 + sound/usb/media.c | 327 +++++++++++++++++++++++++++++++++++++++++ sound/usb/media.h | 74 ++++++++++ sound/usb/mixer.h | 3 + sound/usb/pcm.c | 29 +++- sound/usb/quirks-table.h | 1 + sound/usb/stream.c | 2 + sound/usb/usbaudio.h | 6 + tools/testing/selftests/media_tests/media_dev_allocator.sh | 85 +++++++++++ 22 files changed, 976 insertions(+), 67 deletions(-) create mode 100644 drivers/media/media-dev-allocator.c create mode 100644 include/media/media-dev-allocator.h create mode 100644 sound/usb/media.c create mode 100644 sound/usb/media.h create mode 100755 tools/testing/selftests/media_tests/media_dev_allocator.sh

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[alsa-devel] [PATCH RFC] ALSA: usb-audio: Scarlett mixer interface for 18i20 Gen 2
by Geoffrey D. Bennett 03 Apr '19

03 Apr '19

Add mixer quirk for the Focusrite Scarlett 18i20 Gen 2 audio interface. Although the interface is USB compliant, additional hardware mixing, routing, and metering functionality is available using proprietary USB requests. Signed-off-by: Geoffrey D. Bennett <g(a)b4.vu> --- Hi all, This patch adds the following controls for the Scarlett 18i20 Gen 2: - Master volume knob indicator - Volume controls for the 10 analogue HW outputs - HW/SW volume switches for the 10 analogue HW outputs - Output mux (where the sound for the HW outputs comes from; defaults to PCM outputs 1-20) - Capture mux (where the sound for PCM recording comes from; defaults to HW inputs 1-18) - Matrix mux (where the sound going into the mixer comes from; 18 inputs default off) - Mixer matrix (18 inputs * 10 outputs = 180 controls) - Mute and dim indicators - Level meters This is my first attempt at writing any kernel device driver code, so apologies in advance if I missed something. There's a couple of things I'm particularly unsure about: - I added a private field to struct snd_usb_audio for storing the private mixer data. This seems wrong, but I didn't know where else I could/should put that data. - I've #define'd the vendor-specific interface, endpoint, max_data, and interval values. Is it okay to leave these hard-coded (they match the values provided by lsusb -v; I presume they never change?), or should they be looked up at runtime instead? (and if at runtime, how?) - I'm not sure if those snd_printk()s for unexpected responses from the hardware should be left in there? Removed? Reworded? Comments and feedback would be very welcome. Regards, Geoffrey. diff --git a/sound/usb/Makefile b/sound/usb/Makefile index d330f74c90e6..8cf7081e17cb 100644 --- a/sound/usb/Makefile +++ b/sound/usb/Makefile @@ -11,6 +11,7 @@ snd-usb-audio-objs := card.o \ mixer.o \ mixer_quirks.o \ mixer_scarlett.o \ + mixer_scarlett_gen2.o \ mixer_us16x08.o \ pcm.o \ power.o \ diff --git a/sound/usb/card.c b/sound/usb/card.c index 746a72e23cf9..06bd839e9ab2 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -354,6 +354,8 @@ static void snd_usb_audio_free(struct snd_card *card) list_for_each_entry_safe(ep, n, &chip->ep_list, list) snd_usb_endpoint_free(ep); + kfree(chip->private); + mutex_destroy(&chip->mutex); if (!atomic_read(&chip->shutdown)) dev_set_drvdata(&chip->dev->dev, NULL); diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c index 85ae0ff2382a..331f0596e42d 100644 --- a/sound/usb/mixer_quirks.c +++ b/sound/usb/mixer_quirks.c @@ -45,6 +45,7 @@ #include "mixer.h" #include "mixer_quirks.h" #include "mixer_scarlett.h" +#include "mixer_scarlett_gen2.h" #include "mixer_us16x08.h" #include "helper.h" @@ -2273,6 +2274,10 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer) err = snd_scarlett_controls_create(mixer); break; + case USB_ID(0x1235, 0x8201): /* Focusrite Scarlett 18i20 2nd Gen */ + err = snd_scarlett_gen2_controls_create(mixer); + break; + case USB_ID(0x041e, 0x323b): /* Creative Sound Blaster E1 */ err = snd_soundblaster_e1_switch_create(mixer); break; diff --git a/sound/usb/mixer_scarlett_gen2.c b/sound/usb/mixer_scarlett_gen2.c new file mode 100644 index 000000000000..943b65ff27f1 --- /dev/null +++ b/sound/usb/mixer_scarlett_gen2.c @@ -0,0 +1,1592 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Focusrite Scarlett 18i20 Gen 2 Driver for ALSA + * + * Copyright (c) 2018-2019 by Geoffrey D. Bennett + * + * Based on the Scarlett (Gen 1) Driver for ALSA: + * + * Copyright (c) 2013 by Tobias Hoffmann + * Copyright (c) 2013 by Robin Gareus <robin at gareus.org> + * Copyright (c) 2002 by Takashi Iwai <tiwai at suse.de> + * Copyright (c) 2014 by Chris J Arges <chris.j.arges at canonical.com> + * + * Many codes borrowed from audio.c by + * Alan Cox (alan at lxorguk.ukuu.org.uk) + * Thomas Sailer (sailer at ife.ee.ethz.ch) + * + * Code cleanup: + * David Henningsson <david.henningsson at canonical.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +/* Mixer Interface for the Focusrite Scarlett 18i20 Gen 2 audio + * interface. Based on the Gen 1 driver and rewritten. + */ + +/* The protocol was reverse engineered by looking at the communication + * between Focusrite Control 2.3.4 and the Focusrite(R) Scarlett 18i20 + * (firmware 1083) using usbmon in July-August 2018. + * + * This ALSA mixer gives access to: + * - input, output, mixer-matrix muxes + * - 18x10 mixer-matrix gain stages + * - gain/volume controls + * - level meters + * + * <ditaa> + * /--------------\ 18chn 20chn /--------------\ + * | Hardware in +--+------\ /-------------+--+ ALSA PCM out | + * \--------------/ | | | | \--------------/ + * | | | /-----\ | + * | | | | | | + * | v v v | | + * | +---------------+ | | + * | \ Matrix Mux / | | + * | +-----+-----+ | | + * | | | | + * | |18chn | | + * | | | | + * | | 10chn| | + * | v | | + * | +------------+ | | + * | | Mixer | | | + * | | Matrix | | | + * | | | | | + * | | 18x10 Gain | | | + * | | stages | | | + * | +-----+------+ | | + * | | | | + * |18chn |10chn | |20chn + * | | | | + * | +----------/ | + * | | | + * v v v + * =========================== + * +---------------+ +--—------------+ + * \ Output Mux / \ Capture Mux / + * +---+---+---+ +-----+-----+ + * | | | + * 10chn| | |18chn + * | | | + * /--------------\ | | | /--------------\ + * | S/PDIF, ADAT |<--/ |10chn \-->| ALSA PCM in | + * | Hardware out | | \--------------/ + * \--------------/ | + * v + * +-------------+ switch per channel to select + * | Master Gain |<-- front panel volume knob or + * +------+------+ individual software gain + * | + * |10chn + * /--------------\ | + * | Analogue |<------/ + * | Hardware out | + * \--------------/ + * </ditaa> + * + */ + +#include <linux/slab.h> +#include <linux/usb.h> + +#include <sound/control.h> +#include <sound/tlv.h> + +#include "usbaudio.h" +#include "mixer.h" +#include "helper.h" + +#include "mixer_scarlett_gen2.h" + +/* some gui mixers can't handle negative ctl values */ +#define SCARLETT_VOLUME_BIAS 127 + +/* mixer range from -80dB to +6dB in 0.5dB steps */ +#define SCARLETT_MIXER_MIN_DB -80 +#define SCARLETT_MIXER_BIAS (-SCARLETT_MIXER_MIN_DB * 2) +#define SCARLETT_MIXER_MAX_DB 6 +#define SCARLETT_MIXER_MAX_VALUE \ + ((SCARLETT_MIXER_MAX_DB - SCARLETT_MIXER_MIN_DB) * 2) + +/* map from (dB + 80) * 2 to mixer value + * for dB in 0 .. 172: int(8192 * pow(10, ((dB - 160) / 2 / 20))) + */ +static const __u16 scarlett2_mixer_values[173] = { + 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, + 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 8, 8, + 9, 9, 10, 10, 11, 12, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, + 23, 24, 25, 27, 29, 30, 32, 34, 36, 38, 41, 43, 46, 48, 51, + 54, 57, 61, 65, 68, 73, 77, 81, 86, 91, 97, 103, 109, 115, + 122, 129, 137, 145, 154, 163, 173, 183, 194, 205, 217, 230, + 244, 259, 274, 290, 307, 326, 345, 365, 387, 410, 434, 460, + 487, 516, 547, 579, 614, 650, 689, 730, 773, 819, 867, 919, + 973, 1031, 1092, 1157, 1225, 1298, 1375, 1456, 1543, 1634, + 1731, 1833, 1942, 2057, 2179, 2308, 2445, 2590, 2744, 2906, + 3078, 3261, 3454, 3659, 3876, 4105, 4349, 4606, 4879, 5168, + 5475, 5799, 6143, 6507, 6892, 7301, 7733, 8192, 8677, 9191, + 9736, 10313, 10924, 11571, 12257, 12983, 13752, 14567, 15430, + 16345 +}; + +/* Maximum number of analogue outputs */ +#define SCARLETT2_CONTROLS_MAX 10 + +/* Maximum number of inputs to the mixer */ +#define SCARLETT2_INPUT_MIX_MAX 18 + +/* Maximum number of outputs from the mixer */ +#define SCARLETT2_OUTPUT_MIX_MAX 10 + +/* Maximum size of the data in the USB mux assignment message: + * 18 inputs, 20 outputs, 18 matrix inputs, 8 spare + */ +#define SCARLETT2_MUX_MAX 64 + +/* Number of meters: + * 18 inputs, 20 outputs, 18 matrix inputs + */ +#define SCARLETT2_NUM_METERS 56 + +/* Hardware port types: + * - None (no input to mux) + * - Analogue I/O + * - S/PDIF I/O + * - ADAT I/O + * - Mixer I/O + * - PCM I/O + */ +enum { + SCARLETT2_PORT_TYPE_NONE = 0, + SCARLETT2_PORT_TYPE_ANALOGUE = 1, + SCARLETT2_PORT_TYPE_SPDIF = 2, + SCARLETT2_PORT_TYPE_ADAT = 3, + SCARLETT2_PORT_TYPE_MIX = 4, + SCARLETT2_PORT_TYPE_PCM = 5, + SCARLETT2_PORT_TYPE_COUNT = 6, +}; + +/* Count of total I/O and number available at each sample rate */ +enum { + SCARLETT2_PORT_IN = 0, + SCARLETT2_PORT_OUT = 1, + SCARLETT2_PORT_OUT_44 = 2, + SCARLETT2_PORT_OUT_88 = 3, + SCARLETT2_PORT_OUT_176 = 4, + SCARLETT2_PORT_DIRECTIONS = 5, +}; + +#define SCARLETT2_BUTTON_COUNT 2 + +static const char *const scarlett2_button_names[SCARLETT2_BUTTON_COUNT] = { + "Mute", "Dim" +}; + +/* Description of each hardware port type: + * - id: hardware ID for this port type + * - num: number of sources/destinations of this port type + * - src_descr: printf format string for mux input selections + * - src_num_offset: added to channel number for the fprintf + * - dst_descr: printf format string for mixer controls + */ +struct scarlett2_ports { + __u16 id; + int num[SCARLETT2_PORT_DIRECTIONS]; + const char * const src_descr; + int src_num_offset; + const char * const dst_descr; +}; + +struct scarlett2_device_info { + const char * const line_out_descrs[SCARLETT2_CONTROLS_MAX]; + struct scarlett2_ports ports[SCARLETT2_PORT_TYPE_COUNT]; +}; + +struct scarlett2_chip_data { + struct mutex usb_mutex; /* prevent sending concurrent USB requests */ + struct mutex data_mutex; /* lock access to this data */ + const struct scarlett2_device_info *info; + int num_mux_srcs; + __u16 scarlett2_seq; + __u8 vol_updated; + __u8 master_vol; + __u8 vol[SCARLETT2_CONTROLS_MAX]; + __u8 vol_sw_hw_switch[SCARLETT2_CONTROLS_MAX]; + __u8 buttons[SCARLETT2_BUTTON_COUNT]; + struct snd_kcontrol *master_vol_ctl; + struct snd_kcontrol *vol_ctls[SCARLETT2_CONTROLS_MAX]; + struct snd_kcontrol *button_ctls[SCARLETT2_CONTROLS_MAX]; + __u8 mux[SCARLETT2_MUX_MAX]; + __u8 mix[SCARLETT2_INPUT_MIX_MAX * SCARLETT2_OUTPUT_MIX_MAX]; +}; + +struct __attribute__((__packed__)) scarlett2_usb_volume_status { + __u8 buttons[SCARLETT2_BUTTON_COUNT]; /* mute & dim buttons */ + __u8 pad1; + __s16 sw_vol[10]; /* software volume setting */ + __s16 hw_vol[10]; /* actual volume of output inc. dim (-18dB) */ + __u16 pad2[5]; + __u8 sw_hw_switch[10]; /* sw (0) or hw (1) controlled */ + __u16 pad3[3]; + __s16 master_vol; /* front panel volume knob */ +}; + +/*** Model-specific data ***/ + +static const struct scarlett2_device_info s18i20_gen2_info = { + .line_out_descrs = { + "Monitor L", + "Monitor R", + NULL, + NULL, + NULL, + NULL, + "Headphones 1 L", + "Headphones 1 R", + "Headphones 2 L", + "Headphones 2 R", + }, + + .ports = { + { + .id = 0x000, + .num = { 1, 0, 8, 8, 6 }, + .src_descr = "Off", + .src_num_offset = 0, + }, + { + .id = 0x080, + .num = { 8, 10, 10, 10, 10 }, + .src_descr = "Analogue %d", + .src_num_offset = 1, + .dst_descr = "Analogue Output %02d Playback" + }, + { + /* S/PDIF outputs aren't available at 192KHz + * but are included in the USB mux I/O + * assignment message anyway + */ + .id = 0x180, + .num = { 2, 2, 2, 2, 2 }, + .src_descr = "S/PDIF %d", + .src_num_offset = 1, + .dst_descr = "S/PDIF Output %d Playback" + }, + { + .id = 0x200, + .num = { 8, 8, 8, 4, 0 }, + .src_descr = "ADAT %d", + .src_num_offset = 1, + .dst_descr = "ADAT Output %d Playback" + }, + { + .id = 0x300, + .num = { 10, 18, 18, 18, 18 }, + .src_descr = "Mix %c", + .src_num_offset = 65, + .dst_descr = "Mixer Input %02d Capture" + }, + { + .id = 0x600, + .num = { 20, 18, 18, 14, 10 }, + .src_descr = "PCM %d", + .src_num_offset = 1, + .dst_descr = "PCM %02d Capture" + }, + }, +}; + +/* get the starting port index number for a given port type/direction */ +static int scarlett2_get_port_start_num(const struct scarlett2_ports *ports, + int direction, int port_type) +{ + int i, num = 0; + + for (i = 0; i < port_type; i++) + num += ports[i].num[direction]; + + return num; +} + +/*** USB Interactions ***/ + +/* Vendor-Specific Interface, Endpoint, MaxPacketSize, Interval */ +#define SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE 5 +#define SCARLETT2_USB_INTERRUPT_ENDPOINT 4 +#define SCARLETT2_USB_INTERRUPT_MAX_DATA 64 +#define SCARLETT2_USB_INTERRUPT_INTERVAL 3 + +/* Interrupt flags for volume and mute/dim button changes */ +#define SCARLETT2_USB_INTERRUPT_VOL_CHANGE 0x400000 +#define SCARLETT2_USB_INTERRUPT_BUTTON_CHANGE 0x200000 + +/* Commands for sending/receiving requests/responses */ +#define SCARLETT2_USB_VENDOR_SPECIFIC_CMD_REQ 2 +#define SCARLETT2_USB_VENDOR_SPECIFIC_CMD_RESP 3 + +#define SCARLETT2_USB_INIT_SEQ 0x00000000 +#define SCARLETT2_USB_GET_METER_LEVELS 0x00001001 +#define SCARLETT2_USB_SET_MIX 0x00002002 +#define SCARLETT2_USB_SET_MUX 0x00003002 +#define SCARLETT2_USB_GET_DATA 0x00800000 +#define SCARLETT2_USB_SET_DATA_1 0x00800001 +#define SCARLETT2_USB_SET_DATA_2 0x00800002 + +#define SCARLETT2_USB_VOLUME_STATUS_OFFSET 0x31 +#define SCARLETT2_USB_LINE_OUT_VOLUME_OFFSET 0x34 +#define SCARLETT2_USB_SW_HW_SWITCH_OFFSET 0x66 + +#define SCARLETT2_USB_LINE_OUT_VOLUME_SET_MAGIC 1 +#define SCARLETT2_USB_SW_HW_SWITCH_SET_MAGIC 3 +#define SCARLETT2_USB_METER_LEVELS_GET_MAGIC 1 + +/* Send a proprietary format request to the Scarlett interface. */ +static int scarlett2_usb( + struct usb_mixer_interface *mixer, __u32 cmd, + void *req_data, __u16 req_size, void *resp_data, __u16 resp_size) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + + /* proprietary request/response format */ + struct scarlett2_usb_packet { + __u32 cmd; + __u16 size; + __u16 seq; + __u32 error; + __u32 pad; + __u8 data[]; + }; + + __u16 req_buf_size = + sizeof(struct scarlett2_usb_packet) + req_size; + __u16 resp_buf_size = + sizeof(struct scarlett2_usb_packet) + resp_size; + + struct scarlett2_usb_packet *req, *resp; + + int seq, err; + __u32 resp_cmd; + __u32 resp_seq; + __u16 size; + + mutex_lock(&private->usb_mutex); + + /* build request message and send it */ + + req = kmalloc(req_buf_size, GFP_KERNEL); + if (!req) { + mutex_unlock(&private->usb_mutex); + return -ENOMEM; + } + + /* sequence must go up by 1 for each request */ + seq = private->scarlett2_seq++; + + req->cmd = cpu_to_le32(cmd); + req->size = cpu_to_le16(req_size); + req->seq = cpu_to_le16(seq); + req->error = 0; + req->pad = 0; + if (req_size) + memcpy(req->data, req_data, req_size); + + err = snd_usb_ctl_msg(mixer->chip->dev, + usb_sndctrlpipe(mixer->chip->dev, 0), + SCARLETT2_USB_VENDOR_SPECIFIC_CMD_REQ, + USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + 0, + SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE, + req, + req_buf_size); + + kfree(req); + + if (err != req_buf_size) { + snd_printk(KERN_ERR "Scarlett Gen 2 USB request result " + "command %x was %d\n", cmd, err); + mutex_unlock(&private->usb_mutex); + return -EINVAL; + } + + /* send a second message to get the response */ + + resp = kmalloc(resp_buf_size, GFP_KERNEL); + if (!resp) { + mutex_unlock(&private->usb_mutex); + return -ENOMEM; + } + + err = snd_usb_ctl_msg(mixer->chip->dev, + usb_sndctrlpipe(mixer->chip->dev, 0), + SCARLETT2_USB_VENDOR_SPECIFIC_CMD_RESP, + USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + 0, + SCARLETT2_USB_VENDOR_SPECIFIC_INTERFACE, + resp, + resp_buf_size); + + /* validate the response */ + + if (err != resp_buf_size) { + snd_printk(KERN_ERR "Scarlett Gen 2 USB response result " + "command %x was %d\n", cmd, err); + kfree(resp); + mutex_unlock(&private->usb_mutex); + return -EINVAL; + } + + resp_cmd = le32_to_cpu(resp->cmd); + resp_seq = le16_to_cpu(resp->seq); + size = le16_to_cpu(resp->size); + + if (resp_cmd != cmd || + resp_seq != seq || + size != resp_size || + resp->error || + resp->pad) { + snd_printk(KERN_ERR "Scarlett Gen 2 USB invalid response; " + "cmd tx/rx %d/%d seq %d/%d size %d/%d " + "error %d pad %d\n", + cmd, resp_cmd, seq, resp_seq, size, resp_size, + resp->error, resp->pad); + kfree(resp); + mutex_unlock(&private->usb_mutex); + return -EINVAL; + } + + if (resp_size > 0) + memcpy(resp_data, resp->data, resp_size); + + kfree(resp); + mutex_unlock(&private->usb_mutex); + return 0; +} + +/* Send a USB message to set data (currently volume level or switch) */ +static int scarlett2_usb_set( + struct usb_mixer_interface *mixer, + int index, int size, int magic_value, int value) +{ + struct __attribute__((__packed__)) { + __u32 index; + __u32 bytes; + __s32 value; + } req; + __u32 req2; + int err; + + /* send first message with the data */ + req.index = cpu_to_le32(index); + req.bytes = cpu_to_le32(size); + req.value = cpu_to_le32(value); + err = scarlett2_usb(mixer, SCARLETT2_USB_SET_DATA_1, + &req, sizeof(__u32) * 2 + size, NULL, 0); + if (err < 0) + return err; + + /* send second message with the magic value */ + req2 = cpu_to_le32(magic_value); + err = scarlett2_usb(mixer, SCARLETT2_USB_SET_DATA_2, + &req2, sizeof(req2), NULL, 0); + if (err < 0) + return err; + + return 0; +} + +/* Send a USB message to get data; result placed in *buf */ +static int scarlett2_usb_get( + struct usb_mixer_interface *mixer, + __u32 cmd, int offset, void *buf, int size) +{ + struct __attribute__((__packed__)) { + __u32 offset; + __u32 size; + } req; + int err; + + /* send first message with the data */ + req.offset = cpu_to_le32(offset); + req.size = cpu_to_le32(size); + err = scarlett2_usb(mixer, cmd, &req, sizeof(req), buf, size); + if (err < 0) + return err; + + return 0; +} + +/* Send a USB message to get volume status; result placed in *buf */ +static int scarlett2_usb_get_volume_status( + struct usb_mixer_interface *mixer, + struct scarlett2_usb_volume_status *buf) +{ + return scarlett2_usb_get( + mixer, + SCARLETT2_USB_GET_DATA, + SCARLETT2_USB_VOLUME_STATUS_OFFSET, + buf, sizeof(*buf)); +} + +/* Send a USB message to set the software volume for an analogue output */ +static int scarlett2_usb_set_line_output_volume( + struct usb_mixer_interface *mixer, + int line_num, int volume) +{ + int offset = SCARLETT2_USB_LINE_OUT_VOLUME_OFFSET + line_num * 2; + + return scarlett2_usb_set( + mixer, offset, 2, + SCARLETT2_USB_LINE_OUT_VOLUME_SET_MAGIC, volume); +} + +/* Send a USB message to set software (0) or hardware (1) volume for + * an analogue output + */ +static int scarlett2_usb_set_monitor_volume_switch( + struct usb_mixer_interface *mixer, int line_num, int value) +{ + int offset = SCARLETT2_USB_SW_HW_SWITCH_OFFSET + line_num; + + return scarlett2_usb_set( + mixer, offset, 1, + SCARLETT2_USB_SW_HW_SWITCH_SET_MAGIC, value); +} + +/* Send a USB message to set the volumes for all inputs of one mix + * (values obtained from private->mix[]) + */ +static int scarlett2_usb_set_mix(struct usb_mixer_interface *mixer, + int mix_num) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + const struct scarlett2_device_info *info = private->info; + + struct __attribute__((__packed__)) { + __u16 mix_num; + __u16 data[SCARLETT2_INPUT_MIX_MAX]; + } req; + + int i, j, err; + int num_mixer_in = + info->ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT]; + + req.mix_num = cpu_to_le16(mix_num); + + for (i = 0, j = mix_num * num_mixer_in; i < num_mixer_in; i++, j++) + req.data[i] = cpu_to_le16( + scarlett2_mixer_values[private->mix[j]] + ); + + err = scarlett2_usb(mixer, SCARLETT2_USB_SET_MIX, + &req, (num_mixer_in + 1) * sizeof(__u16), + NULL, 0); + if (err < 0) + return err; + + return 0; +} + +/* Convert a port number index (per info->ports) to a hardware ID */ +static __u32 scarlett2_mux_src_num_to_id(const struct scarlett2_ports *ports, + int num) +{ + int port_type; + + for (port_type = 0; + port_type < SCARLETT2_PORT_TYPE_COUNT; + port_type++) { + if (num < ports[port_type].num[SCARLETT2_PORT_IN]) + return ports[port_type].id | num; + num -= ports[port_type].num[SCARLETT2_PORT_IN]; + } + + /* Oops */ + return 0; +} + +/* Send USB messages to set mux inputs */ +static int scarlett2_usb_set_mux(struct usb_mixer_interface *mixer) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + const struct scarlett2_device_info *info = private->info; + const struct scarlett2_ports *ports = info->ports; + int rate, port_dir_rate; + + static const int assignment_order[SCARLETT2_PORT_TYPE_COUNT] = { + SCARLETT2_PORT_TYPE_PCM, + SCARLETT2_PORT_TYPE_ANALOGUE, + SCARLETT2_PORT_TYPE_SPDIF, + SCARLETT2_PORT_TYPE_ADAT, + SCARLETT2_PORT_TYPE_MIX, + SCARLETT2_PORT_TYPE_NONE, + }; + + struct __attribute__((__packed__)) { + __u16 pad; + __u16 num; + __u32 data[SCARLETT2_MUX_MAX]; + } req; + + req.pad = 0; + + /* mux settings for each rate */ + for (rate = 0, port_dir_rate = SCARLETT2_PORT_OUT_44; + port_dir_rate <= SCARLETT2_PORT_OUT_176; + rate++, port_dir_rate++) { + int order_num, i, err; + + req.num = cpu_to_le16(rate); + + for (order_num = 0, i = 0; + order_num < SCARLETT2_PORT_TYPE_COUNT; + order_num++) { + int port_type = assignment_order[order_num]; + int j = scarlett2_get_port_start_num(ports, + SCARLETT2_PORT_OUT, + port_type); + int port_id = ports[port_type].id; + int channel; + + for (channel = 0; + channel < ports[port_type].num[port_dir_rate]; + channel++, i++, j++) + /* lower 12 bits for the destination and + * next 12 bits for the source + */ + req.data[i] = !port_id + ? 0 + : cpu_to_le32( + port_id | + channel | + scarlett2_mux_src_num_to_id( + ports, private->mux[j] + ) << 12 + ); + + /* skip private->mux[j] entries not output */ + j += ports[port_type].num[SCARLETT2_PORT_OUT] - + ports[port_type].num[port_dir_rate]; + } + + err = scarlett2_usb(mixer, SCARLETT2_USB_SET_MUX, + &req, (i + 1) * sizeof(__u32), + NULL, 0); + if (err < 0) + return err; + } + + return 0; +} + +/* Send USB message to get meter levels */ +static int scarlett2_usb_get_meter_levels(struct usb_mixer_interface *mixer, + __u16 *levels) +{ + struct __attribute__((__packed__)) { + __u16 pad; + __u16 num_meters; + __u32 magic; + } req; + __u32 resp[SCARLETT2_NUM_METERS]; + int i, err; + + req.pad = 0; + req.num_meters = cpu_to_le16(SCARLETT2_NUM_METERS); + req.magic = cpu_to_le32(SCARLETT2_USB_METER_LEVELS_GET_MAGIC); + err = scarlett2_usb(mixer, SCARLETT2_USB_GET_METER_LEVELS, + &req, sizeof(req), resp, sizeof(resp)); + if (err < 0) + return err; + + /* copy, convert to u16 */ + for (i = 0; i < SCARLETT2_NUM_METERS; i++) + levels[i] = resp[i]; + + return 0; +} + +/*** Control Functions ***/ + +/* helper function to create a new control */ +static int add_new_ctl(struct usb_mixer_interface *mixer, + const struct snd_kcontrol_new *ncontrol, + int index, int channels, const char *name, + struct snd_kcontrol **kctl_return) +{ + struct snd_kcontrol *kctl; + struct usb_mixer_elem_info *elem; + int err; + + elem = kzalloc(sizeof(*elem), GFP_KERNEL); + if (!elem) + return -ENOMEM; + + elem->head.mixer = mixer; + elem->control = index; + elem->head.id = index; + elem->channels = channels; + + kctl = snd_ctl_new1(ncontrol, elem); + if (!kctl) { + kfree(elem); + return -ENOMEM; + } + kctl->private_free = snd_usb_mixer_elem_free; + + strlcpy(kctl->id.name, name, sizeof(kctl->id.name)); + + err = snd_usb_mixer_add_control(&elem->head, kctl); + if (err < 0) + return err; + + if (kctl_return) + *kctl_return = kctl; + + return 0; +} + +/*** Analogue Line Out Volume Controls ***/ + +/* first-time initialisation of volumes */ +static int scarlett2_init_volumes(struct usb_mixer_interface *mixer) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + const struct scarlett2_ports *ports = private->info->ports; + int num_line_out = + ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT]; + struct scarlett2_usb_volume_status volume_status; + int err, i; + + err = scarlett2_usb_get_volume_status(mixer, &volume_status); + if (err < 0) + return err; + + private->master_vol = clamp( + volume_status.master_vol + SCARLETT_VOLUME_BIAS, + 0, SCARLETT_VOLUME_BIAS); + + for (i = 0; i < num_line_out; i++) { + int volume; + + private->vol_sw_hw_switch[i] = !!volume_status.sw_hw_switch[i]; + + volume = private->vol_sw_hw_switch[i] + ? volume_status.master_vol + : volume_status.sw_vol[i]; + volume = clamp(volume + SCARLETT_VOLUME_BIAS, + 0, SCARLETT_VOLUME_BIAS); + private->vol[i] = volume; + } + + for (i = 0; i < SCARLETT2_BUTTON_COUNT; i++) + private->buttons[i] = !!volume_status.buttons[i]; + + return 0; +} + +/* update hardware volume controls after receiving notification that + * they have changed + */ +static int scarlett2_update_volumes(struct usb_mixer_interface *mixer) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + const struct scarlett2_ports *ports = private->info->ports; + struct scarlett2_usb_volume_status volume_status; + int num_line_out = + ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT]; + int err, i; + + private->vol_updated = 0; + + err = scarlett2_usb_get_volume_status(mixer, &volume_status); + if (err < 0) + return err; + + private->master_vol = clamp( + volume_status.master_vol + SCARLETT_VOLUME_BIAS, + 0, SCARLETT_VOLUME_BIAS); + + for (i = 0; i < num_line_out; i++) { + if (private->vol_sw_hw_switch[i]) + private->vol[i] = private->master_vol; + } + + for (i = 0; i < SCARLETT2_BUTTON_COUNT; i++) + private->buttons[i] = !!volume_status.buttons[i]; + + return 0; +} + +static int scarlett2_volume_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *uinfo) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = elem->channels; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = SCARLETT_VOLUME_BIAS; + uinfo->value.integer.step = 1; + return 0; +} + +static int scarlett2_master_volume_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + + if (private->vol_updated) { + mutex_lock(&private->data_mutex); + scarlett2_update_volumes(elem->head.mixer); + mutex_unlock(&private->data_mutex); + } + + ucontrol->value.integer.value[0] = private->master_vol; + return 0; +} + +static int scarlett2_volume_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + int index = elem->control; + + if (private->vol_updated) { + mutex_lock(&private->data_mutex); + scarlett2_update_volumes(elem->head.mixer); + mutex_unlock(&private->data_mutex); + } + + ucontrol->value.integer.value[0] = private->vol[index]; + return 0; +} + +static int scarlett2_volume_ctl_put(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + int index = elem->control; + int oval, val, err; + + mutex_lock(&private->data_mutex); + + oval = private->vol[index]; + val = ucontrol->value.integer.value[0]; + + if (oval == val) { + mutex_unlock(&private->data_mutex); + return 0; + } + + private->vol[index] = val; + err = scarlett2_usb_set_line_output_volume(elem->head.mixer, + index, + val - SCARLETT_VOLUME_BIAS); + mutex_unlock(&private->data_mutex); + return err < 0 ? err : 1; +} + +static const DECLARE_TLV_DB_MINMAX( + db_scale_scarlett_gain, -SCARLETT_VOLUME_BIAS * 100, 0 +); + +static const struct snd_kcontrol_new scarlett2_master_volume_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READ | + SNDRV_CTL_ELEM_ACCESS_TLV_READ, + .name = "", + .info = scarlett2_volume_ctl_info, + .get = scarlett2_master_volume_ctl_get, + .private_value = 0, /* max value */ + .tlv = { .p = db_scale_scarlett_gain } +}; + +static const struct snd_kcontrol_new scarlett2_line_out_volume_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | + SNDRV_CTL_ELEM_ACCESS_TLV_READ, + .name = "", + .info = scarlett2_volume_ctl_info, + .get = scarlett2_volume_ctl_get, + .put = scarlett2_volume_ctl_put, + .private_value = 0, /* max value */ + .tlv = { .p = db_scale_scarlett_gain } +}; + +/*** HW/SW Volume Switch Controls ***/ + +static int scarlett2_sw_hw_enum_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *uinfo) +{ + static const char *const values[2] = { + "SW", "HW" + }; + + return snd_ctl_enum_info(uinfo, 1, 2, values); +} + +static int scarlett2_sw_hw_enum_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + + ucontrol->value.enumerated.item[0] = + private->vol_sw_hw_switch[elem->control]; + return 0; +} + +static int scarlett2_sw_hw_enum_ctl_put(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + + int index = elem->control; + int oval, val, err; + + mutex_lock(&private->data_mutex); + + oval = private->vol_sw_hw_switch[index]; + val = !!ucontrol->value.integer.value[0]; + + if (oval == val) { + mutex_unlock(&private->data_mutex); + return 0; + } + + private->vol_sw_hw_switch[index] = val; + + /* Change access mode to RO (hardware controlled volume) + * or RW (software controlled volume) + */ + if (val) + private->vol_ctls[index]->vd[0].access &= + ~SNDRV_CTL_ELEM_ACCESS_WRITE; + else + private->vol_ctls[index]->vd[0].access |= + SNDRV_CTL_ELEM_ACCESS_WRITE; + + /* Reset volume to master volume */ + private->vol[index] = private->master_vol; + + /* Set SW volume to current HW volume */ + err = scarlett2_usb_set_line_output_volume( + elem->head.mixer, index, + private->master_vol - SCARLETT_VOLUME_BIAS); + if (err < 0) { + mutex_unlock(&private->data_mutex); + return err; + } + + /* Notify of RO/RW change */ + snd_ctl_notify(elem->head.mixer->chip->card, + SNDRV_CTL_EVENT_MASK_INFO, + &private->vol_ctls[index]->id); + + /* Send SW/HW switch change to the device */ + err = scarlett2_usb_set_monitor_volume_switch(elem->head.mixer, + index, val); + mutex_unlock(&private->data_mutex); + return err; +} + +static const struct snd_kcontrol_new scarlett2_sw_hw_enum_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "", + .info = scarlett2_sw_hw_enum_ctl_info, + .get = scarlett2_sw_hw_enum_ctl_get, + .put = scarlett2_sw_hw_enum_ctl_put, +}; + +/*** Mute/Dim Controls ***/ + +static int scarlett2_button_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + + if (private->vol_updated) { + mutex_lock(&private->data_mutex); + scarlett2_update_volumes(elem->head.mixer); + mutex_unlock(&private->data_mutex); + } + + ucontrol->value.enumerated.item[0] = private->buttons[elem->control]; + return 0; +} + +static const struct snd_kcontrol_new scarlett2_button_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .name = "", + .info = snd_ctl_boolean_mono_info, + .get = scarlett2_button_ctl_get +}; + +/*** Create the volume and volume switch controls ***/ + +static int scarlett2_add_line_out_ctls(struct usb_mixer_interface *mixer) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + const struct scarlett2_device_info *info = private->info; + const struct scarlett2_ports *ports = info->ports; + int num_line_out = + ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT]; + int err, i; + char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; + + /* Add R/O HW volume control */ + snprintf(mx, sizeof(mx), "Master HW Playback Volume"); + err = add_new_ctl(mixer, &scarlett2_master_volume_ctl, + 0, 1, mx, &private->master_vol_ctl); + if (err < 0) + return err; + + /* Add volume controls */ + for (i = 0; i < num_line_out; i++) { + + /* Fader */ + if (info->line_out_descrs[i]) + snprintf(mx, sizeof(mx), + "Line %02d (%s) Playback Volume", + i + 1, info->line_out_descrs[i]); + else + snprintf(mx, sizeof(mx), + "Line %02d Playback Volume", + i + 1); + err = add_new_ctl(mixer, &scarlett2_line_out_volume_ctl, + i, 1, mx, &private->vol_ctls[i]); + if (err < 0) + return err; + + /* Make the fader read-only if the SW/HW switch is set to HW */ + if (private->vol_sw_hw_switch[i]) + private->vol_ctls[i]->vd[0].access &= + ~SNDRV_CTL_ELEM_ACCESS_WRITE; + + /* SW/HW Switch */ + snprintf(mx, sizeof(mx), + "Line Out %02d Volume Control Playback Enum", + i + 1); + err = add_new_ctl(mixer, &scarlett2_sw_hw_enum_ctl, + i, 1, mx, NULL); + if (err < 0) + return err; + } + + /* Add button controls */ + for (i = 0; i < SCARLETT2_BUTTON_COUNT; i++) { + err = add_new_ctl(mixer, &scarlett2_button_ctl, + i, 1, scarlett2_button_names[i], + &private->button_ctls[i]); + if (err < 0) + return err; + } + + return 0; +} + +/*** Mixer Volume Controls ***/ + +static int scarlett2_mixer_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *uinfo) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = elem->channels; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = SCARLETT_MIXER_MAX_VALUE; + uinfo->value.integer.step = 1; + return 0; +} + +static int scarlett2_mixer_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + + ucontrol->value.integer.value[0] = private->mix[elem->control]; + return 0; +} + +static int scarlett2_mixer_ctl_put(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + const struct scarlett2_device_info *info = private->info; + const struct scarlett2_ports *ports = info->ports; + int oval, val, num_mixer_in, mix_num, err; + + mutex_lock(&private->data_mutex); + + oval = private->mix[elem->control]; + val = ucontrol->value.integer.value[0]; + num_mixer_in = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT]; + mix_num = elem->control / num_mixer_in; + + if (oval == val) { + mutex_unlock(&private->data_mutex); + return 0; + } + + private->mix[elem->control] = val; + err = scarlett2_usb_set_mix(elem->head.mixer, mix_num); + mutex_unlock(&private->data_mutex); + return err < 0 ? err : 1; +} + +static const DECLARE_TLV_DB_MINMAX( + db_scale_scarlett_mixer, + SCARLETT_MIXER_MIN_DB * 100, + SCARLETT_MIXER_MAX_DB * 100 +); + +static const struct snd_kcontrol_new scarlett2_mixer_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | + SNDRV_CTL_ELEM_ACCESS_TLV_READ, + .name = "", + .info = scarlett2_mixer_ctl_info, + .get = scarlett2_mixer_ctl_get, + .put = scarlett2_mixer_ctl_put, + .private_value = SCARLETT_MIXER_MAX_DB, /* max value */ + .tlv = { .p = db_scale_scarlett_mixer } +}; + +static int scarlett2_add_mixer_ctls(struct usb_mixer_interface *mixer) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + const struct scarlett2_ports *ports = private->info->ports; + int err, i, j; + int index; + char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; + + int num_inputs = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_OUT]; + int num_outputs = ports[SCARLETT2_PORT_TYPE_MIX].num[SCARLETT2_PORT_IN]; + + for (i = 0, index = 0; i < num_outputs; i++) { + for (j = 0; j < num_inputs; j++, index++) { + snprintf(mx, sizeof(mx), + "Mix %c Input %02d Playback Volume", + 'A' + i, j + 1); + err = add_new_ctl(mixer, &scarlett2_mixer_ctl, + index, 1, mx, NULL); + if (err < 0) + return err; + } + } + + return 0; +} + +/*** Mux Source Selection Controls ***/ + +static int scarlett2_mux_src_enum_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *uinfo) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + const struct scarlett2_ports *ports = private->info->ports; + unsigned int item = uinfo->value.enumerated.item; + int items = private->num_mux_srcs; + int port_type; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + uinfo->count = elem->channels; + uinfo->value.enumerated.items = items; + + if (item >= items) + item = uinfo->value.enumerated.item = items - 1; + + for (port_type = 0; + port_type < SCARLETT2_PORT_TYPE_COUNT; + port_type++) { + if (item < ports[port_type].num[SCARLETT2_PORT_IN]) { + sprintf(uinfo->value.enumerated.name, + ports[port_type].src_descr, + item + ports[port_type].src_num_offset); + return 0; + } + item -= ports[port_type].num[SCARLETT2_PORT_IN]; + } + + return -EINVAL; +} + +static int scarlett2_mux_src_enum_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + + ucontrol->value.enumerated.item[0] = private->mux[elem->control]; + return 0; +} + +static int scarlett2_mux_src_enum_ctl_put(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + struct scarlett2_chip_data *private = elem->head.mixer->chip->private; + int index = elem->control; + int oval, val, err; + + mutex_lock(&private->data_mutex); + + oval = private->mux[index]; + val = clamp(ucontrol->value.integer.value[0], + 0L, private->num_mux_srcs - 1L); + + if (oval == val) { + mutex_unlock(&private->data_mutex); + return 0; + } + + private->mux[index] = val; + err = scarlett2_usb_set_mux(elem->head.mixer); + mutex_unlock(&private->data_mutex); + return err < 0 ? err : 1; +} + +static const struct snd_kcontrol_new scarlett2_mux_src_enum_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "", + .info = scarlett2_mux_src_enum_ctl_info, + .get = scarlett2_mux_src_enum_ctl_get, + .put = scarlett2_mux_src_enum_ctl_put, +}; + +static int scarlett2_add_mux_enums(struct usb_mixer_interface *mixer) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + const struct scarlett2_ports *ports = private->info->ports; + int port_type, channel, i; + + for (i = 0, port_type = 0; + port_type < SCARLETT2_PORT_TYPE_COUNT; + port_type++) { + for (channel = 0; + channel < ports[port_type].num[SCARLETT2_PORT_OUT]; + channel++, i++) { + int err; + char mx[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; + const char *const descr = ports[port_type].dst_descr; + + snprintf(mx, sizeof(mx) - 5, descr, channel + 1); + strcat(mx, " Enum"); + + err = add_new_ctl(mixer, + &scarlett2_mux_src_enum_ctl, + i, 1, mx, NULL); + if (err < 0) + return err; + } + } + + return 0; +} + +/*** Meter Controls ***/ + +static int scarlett2_meter_ctl_info(struct snd_kcontrol *kctl, + struct snd_ctl_elem_info *uinfo) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = elem->channels; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 4095; + uinfo->value.integer.step = 1; + return 0; +} + +static int scarlett2_meter_ctl_get(struct snd_kcontrol *kctl, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *elem = kctl->private_data; + __u16 meter_levels[SCARLETT2_NUM_METERS]; + int i, err; + + err = scarlett2_usb_get_meter_levels(elem->head.mixer, meter_levels); + if (err < 0) + return err; + + for (i = 0; i < elem->channels; i++) + ucontrol->value.integer.value[i] = meter_levels[i]; + + return 0; +} + +static const struct snd_kcontrol_new scarlett2_meter_ctl = { + .iface = SNDRV_CTL_ELEM_IFACE_PCM, + .access = SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE, + .name = "", + .info = scarlett2_meter_ctl_info, + .get = scarlett2_meter_ctl_get +}; + +static int scarlett2_add_meter_ctl(struct usb_mixer_interface *mixer) +{ + return add_new_ctl(mixer, &scarlett2_meter_ctl, + 0, SCARLETT2_NUM_METERS, "Level Meter", NULL); +} + +/*** Initialisation ***/ + +static int scarlett2_count_mux_srcs(const struct scarlett2_ports *ports) +{ + int port_type, count = 0; + + for (port_type = 0; + port_type < SCARLETT2_PORT_TYPE_COUNT; + port_type++) + count += ports[port_type].num[SCARLETT2_PORT_IN]; + + return count; +} + +/* Default routing connects PCM outputs and inputs to Analogue, + * S/PDIF, then ADAT + */ +static void scarlett2_init_routing(__u8 *mux, + const struct scarlett2_ports *ports) +{ + int i, input_num, input_count, port_type; + int output_num, output_count, port_type_connect_num; + + static const int connect_order[] = { + SCARLETT2_PORT_TYPE_ANALOGUE, + SCARLETT2_PORT_TYPE_SPDIF, + SCARLETT2_PORT_TYPE_ADAT, + -1 + }; + + /* Assign PCM inputs (routing outputs) */ + output_num = scarlett2_get_port_start_num(ports, + SCARLETT2_PORT_OUT, + SCARLETT2_PORT_TYPE_PCM); + output_count = ports[SCARLETT2_PORT_TYPE_PCM].num[SCARLETT2_PORT_OUT]; + + for (port_type = connect_order[port_type_connect_num = 0]; + port_type >= 0; + port_type = connect_order[++port_type_connect_num]) { + input_num = scarlett2_get_port_start_num( + ports, SCARLETT2_PORT_IN, port_type); + input_count = ports[port_type].num[SCARLETT2_PORT_IN]; + for (i = 0; + i < input_count && output_count; + i++, output_count--) + mux[output_num++] = input_num++; + } + + /* Assign PCM outputs (routing inputs) */ + input_num = scarlett2_get_port_start_num(ports, + SCARLETT2_PORT_IN, + SCARLETT2_PORT_TYPE_PCM); + input_count = ports[SCARLETT2_PORT_TYPE_PCM].num[SCARLETT2_PORT_IN]; + + for (port_type = connect_order[port_type_connect_num = 0]; + port_type >= 0; + port_type = connect_order[++port_type_connect_num]) { + output_num = scarlett2_get_port_start_num( + ports, SCARLETT2_PORT_OUT, port_type); + output_count = ports[port_type].num[SCARLETT2_PORT_OUT]; + for (i = 0; + i < output_count && input_count; + i++, input_count--) + mux[output_num++] = input_num++; + } +} + +/* Initialise private data, routing, sequence number */ +static int scarlett2_init_private(struct usb_mixer_interface *mixer, + const struct scarlett2_device_info *info) +{ + struct scarlett2_chip_data *private = + kzalloc(sizeof(struct scarlett2_chip_data), GFP_KERNEL); + + if (!private) + return -ENOMEM; + + mutex_init(&private->usb_mutex); + mutex_init(&private->data_mutex); + private->info = info; + private->num_mux_srcs = scarlett2_count_mux_srcs(info->ports); + private->scarlett2_seq = 0; + mixer->chip->private = private; + + /* Setup default routing */ + scarlett2_init_routing(private->mux, info->ports); + + /* Initialise the sequence number used for the proprietary commands */ + return scarlett2_usb(mixer, SCARLETT2_USB_INIT_SEQ, + NULL, 0, NULL, 0); +} + +/* Notify on volume change */ +static void scarlett2_mixer_interrupt_vol_change( + struct usb_mixer_interface *mixer) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + const struct scarlett2_ports *ports = private->info->ports; + int num_line_out = + ports[SCARLETT2_PORT_TYPE_ANALOGUE].num[SCARLETT2_PORT_OUT]; + int i; + + private->vol_updated = 1; + + snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, + &private->master_vol_ctl->id); + + for (i = 0; i < num_line_out; i++) { + if (!private->vol_sw_hw_switch[i]) + continue; + snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, + &private->vol_ctls[i]->id); + } +} + +/* Notify on button change */ +static void scarlett2_mixer_interrupt_button_change( + struct usb_mixer_interface *mixer) +{ + struct scarlett2_chip_data *private = mixer->chip->private; + int i; + + private->vol_updated = 1; + + for (i = 0; i < SCARLETT2_BUTTON_COUNT; i++) + snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, + &private->button_ctls[i]->id); +} + +/* Interrupt callback */ +static void scarlett2_mixer_interrupt(struct urb *urb) +{ + struct usb_mixer_interface *mixer = urb->context; + int len = urb->actual_length; + int ustatus = urb->status; + __u32 data; + + if (ustatus != 0) + goto requeue; + + if (len == 8) { + data = le32_to_cpu(*(__u32 *)urb->transfer_buffer); + if (data & SCARLETT2_USB_INTERRUPT_VOL_CHANGE) + scarlett2_mixer_interrupt_vol_change(mixer); + if (data & SCARLETT2_USB_INTERRUPT_BUTTON_CHANGE) + scarlett2_mixer_interrupt_button_change(mixer); + } else { + snd_printk(KERN_ERR "scarlett mixer interrupt length %d\n", + len); + } + +requeue: + if (ustatus != -ENOENT && + ustatus != -ECONNRESET && + ustatus != -ESHUTDOWN) { + urb->dev = mixer->chip->dev; + usb_submit_urb(urb, GFP_ATOMIC); + } +} + +static int scarlett2_mixer_status_create(struct usb_mixer_interface *mixer) +{ + void *transfer_buffer; + + if (mixer->urb) { + snd_printk(KERN_ERR "%s: mixer urb already in use!\n", + __func__); + return 0; + } + + mixer->urb = usb_alloc_urb(0, GFP_KERNEL); + if (!mixer->urb) + return -ENOMEM; + + transfer_buffer = kmalloc(SCARLETT2_USB_INTERRUPT_MAX_DATA, GFP_KERNEL); + if (!transfer_buffer) + return -ENOMEM; + + usb_fill_int_urb( + mixer->urb, + mixer->chip->dev, + usb_rcvintpipe(mixer->chip->dev, + SCARLETT2_USB_INTERRUPT_ENDPOINT), + transfer_buffer, + SCARLETT2_USB_INTERRUPT_MAX_DATA, + scarlett2_mixer_interrupt, + mixer, + SCARLETT2_USB_INTERRUPT_INTERVAL); + + return usb_submit_urb(mixer->urb, GFP_KERNEL); +} + +/* Entry point */ +int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer) +{ + const struct scarlett2_device_info *info; + int err; + + /* only use UAC_VERSION_2 */ + if (!mixer->protocol) + return 0; + + switch (mixer->chip->usb_id) { + case USB_ID(0x1235, 0x8201): + info = &s18i20_gen2_info; + break; + default: /* device not (yet) supported */ + return -EINVAL; + } + + /* Initialise private data, routing, sequence number */ + if ((err = scarlett2_init_private(mixer, info)) < 0) + return err; + + /* Read volume levels and controls from the interface */ + if ((err = scarlett2_init_volumes(mixer)) < 0) + return err; + + /* Create the analogue output volume controls */ + if ((err = scarlett2_add_line_out_ctls(mixer)) < 0) + return err; + + /* Create the input, output, and mixer mux input selections */ + if ((err = scarlett2_add_mux_enums(mixer)) < 0) + return err; + + /* Create the matrix mixer controls */ + if ((err = scarlett2_add_mixer_ctls(mixer)) < 0) + return err; + + /* Create the level meter controls */ + if ((err = scarlett2_add_meter_ctl(mixer)) < 0) + return err; + + /* Set up the interrupt polling */ + if ((err = scarlett2_mixer_status_create(mixer)) < 0) + return err; + + return 0; +} diff --git a/sound/usb/mixer_scarlett_gen2.h b/sound/usb/mixer_scarlett_gen2.h new file mode 100644 index 000000000000..52e1dad77afd --- /dev/null +++ b/sound/usb/mixer_scarlett_gen2.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __USB_MIXER_SCARLETT_GEN2_H +#define __USB_MIXER_SCARLETT_GEN2_H + +int snd_scarlett_gen2_controls_create(struct usb_mixer_interface *mixer); + +#endif /* __USB_MIXER_SCARLETT_GEN2_H */ diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h index b9faeca645fd..1357a73c3a20 100644 --- a/sound/usb/usbaudio.h +++ b/sound/usb/usbaudio.h @@ -66,6 +66,8 @@ struct snd_usb_audio { */ struct usb_host_interface *ctrl_intf; /* the audio control interface */ + + void *private; }; #define usb_audio_err(chip, fmt, args...) \

1 0

[alsa-devel] [PATCH] ASoC: fsl_esai: Support synchronous mode
by S.j. Wang 03 Apr '19

03 Apr '19

In ESAI synchronous mode, the clock is generated by Tx, So we should always set registers of Tx which relate with the bit clock and frame clock generation (TCCR, TCR, ECR), even there is only Rx is working. Signed-off-by: Shengjiu Wang <shengjiu.wang(a)nxp.com> --- sound/soc/fsl/fsl_esai.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c index 3623aa9a6f2e..d9fcddd55c02 100644 --- a/sound/soc/fsl/fsl_esai.c +++ b/sound/soc/fsl/fsl_esai.c @@ -230,6 +230,21 @@ static int fsl_esai_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id, return -EINVAL; } + if (esai_priv->synchronous && !tx) { + switch (clk_id) { + case ESAI_HCKR_FSYS: + fsl_esai_set_dai_sysclk(dai, ESAI_HCKT_FSYS, + freq, dir); + break; + case ESAI_HCKR_EXTAL: + fsl_esai_set_dai_sysclk(dai, ESAI_HCKT_EXTAL, + freq, dir); + break; + default: + return -EINVAL; + } + } + /* Bypass divider settings if the requirement doesn't change */ if (freq == esai_priv->hck_rate[tx] && dir == esai_priv->hck_dir[tx]) return 0; @@ -537,10 +552,21 @@ static int fsl_esai_hw_params(struct snd_pcm_substream *substream, bclk = params_rate(params) * slot_width * esai_priv->slots; - ret = fsl_esai_set_bclk(dai, tx, bclk); + ret = fsl_esai_set_bclk(dai, esai_priv->synchronous ? true : tx, bclk); if (ret) return ret; + if (esai_priv->synchronous && !tx) { + /* Use Normal mode to support monaural audio */ + regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR, + ESAI_xCR_xMOD_MASK, params_channels(params) > 1 ? + ESAI_xCR_xMOD_NETWORK : 0); + + mask = ESAI_xCR_xSWS_MASK | ESAI_xCR_PADC; + val = ESAI_xCR_xSWS(slot_width, width) | ESAI_xCR_PADC; + regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR, mask, val); + } + /* Use Normal mode to support monaural audio */ regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), ESAI_xCR_xMOD_MASK, params_channels(params) > 1 ? -- 1.9.1

2 4

[alsa-devel] [PATCH] ALSA: doc: my_chip has no element ioport
by Christina Quast 03 Apr '19

03 Apr '19

chip->ioport is dereferenced in two places, but the struct is defined as follows: struct mychip { struct snd_card *card; struct pci_dev *pci; unsigned long port; int irq; }; Signed-off-by: Christina Quast <cquast(a)hanoverdisplays.com> --- Documentation/sound/kernel-api/writing-an-alsa-driver.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/sound/kernel-api/writing-an-alsa-driver.rst b/Documentation/sound/kernel-api/writing-an-alsa-driver.rst index 6b154dbb02cc..132f5eb9b530 100644 --- a/Documentation/sound/kernel-api/writing-an-alsa-driver.rst +++ b/Documentation/sound/kernel-api/writing-an-alsa-driver.rst @@ -324,7 +324,7 @@ to details explained in the following section. strcpy(card->driver, "My Chip"); strcpy(card->shortname, "My Own Chip 123"); sprintf(card->longname, "%s at 0x%lx irq %i", - card->shortname, chip->ioport, chip->irq); + card->shortname, chip->port, chip->irq); /* (5) */ .... /* implemented later */ @@ -437,7 +437,7 @@ Since each component can be properly freed, the single strcpy(card->driver, "My Chip"); strcpy(card->shortname, "My Own Chip 123"); sprintf(card->longname, "%s at 0x%lx irq %i", - card->shortname, chip->ioport, chip->irq); + card->shortname, chip->port, chip->irq); The driver field holds the minimal ID string of the chip. This is used by alsa-lib's configurator, so keep it simple but unique. Even the -- 2.20.1

2 1

[alsa-devel] alc295_fixup_chromebook function
by Kailang 03 Apr '19

03 Apr '19

Hi Takashi, You applied below patch. https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?h=f… But I think ALC225_FIXUP_HEADSET_JACK will applicate for enable for headset button. It was not only use for Chrome OS. So, ALC225_FIXUP_HEADSET_JACK and alc295_fixup_chromebook separation were be better. Intel test https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?h=f… this patch. Mic JD was also not stable. (I don't know why. It passed with Ubuntu OS.) It need to change to initial state would be better. (original was HDA_FIXUP_ACT_PRE_PROBE) +static void alc295_fixup_chromebook(struct hda_codec *codec, + const struct hda_fixup *fix, int action) +{ + + switch (action) { + case HDA_FIXUP_ACT_INIT: + switch (codec->core.vendor_id) { + case 0x10ec0295: + alc_update_coef_idx(codec, 0x4a, 0x8000, 1 << 15); /* Reset HP JD */ + alc_update_coef_idx(codec, 0x4a, 0x8000, 0 << 15); + break; + case 0x10ec0236: + alc_update_coef_idx(codec, 0x1b, 0x8000, 1 << 15); /* Reset HP JD */ + alc_update_coef_idx(codec, 0x1b, 0x8000, 0 << 15); + break; + } + break; + } +} How could I create a fix patch for this? Thanks. BR, Kailang

3 5

[alsa-devel] [PATCH] ASoC: Mediatek: MT8183: DA7219: fix build error
by Anders Roxell 03 Apr '19

03 Apr '19

When building CONFIG_SND_SOC_MT8183_DA7219_MAX98357A=m the following errro pops up: ../sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c: In function ‘mt8183_da7219_max98357_dev_probe’: ../sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c:413:13: error: ‘struct snd_soc_dai_link’ has no member named ‘platform’; did you mean ‘platforms’? dai_link->platform = NULL; ^~~~~~~~ platforms Rework to use 'dai_link->platforms' instead of 'dai_link->platform'. Fixes: ebbddc75bbe8 ("ASoC: Mediatek: MT8183: Add machine driver with DA7219") Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org> --- sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c b/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c index 93536659a859..1e7e8aed8707 100644 --- a/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c +++ b/sound/soc/mediatek/mt8183/mt8183-da7219-max98357.c @@ -410,7 +410,7 @@ static int mt8183_da7219_max98357_dev_probe(struct platform_device *pdev) * the "platform" will not null when probe is trying * again. It's not expected normally. */ - dai_link->platform = NULL; + dai_link->platforms = NULL; if (dai_link->platform_name) continue; -- 2.20.1

2 1

[alsa-devel] [asoc:for-5.2 101/107] sound/soc/sprd/sprd-pcm-compress.c:110 sprd_platform_compr_drain_notify() warn: variable dereferenced before check 'cstream' (see line 105)
by Dan Carpenter 03 Apr '19

03 Apr '19

tree: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.2 head: 6d5e2bf9d203e4d9e08ca2e9420c6ff22ad190af commit: cce1396936ef2b347d622b4d49718818eb32029d [101/107] ASoC: sprd: Add Spreadtrum audio compress offload support smatch warnings: sound/soc/sprd/sprd-pcm-compress.c:110 sprd_platform_compr_drain_notify() warn: variable dereferenced before check 'cstream' (see line 105) # https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git/commit/?i… git remote add asoc https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git git remote update asoc git checkout cce1396936ef2b347d622b4d49718818eb32029d vim +/cstream +110 sound/soc/sprd/sprd-pcm-compress.c cce13969 Baolin Wang 2019-03-27 98 cce13969 Baolin Wang 2019-03-27 99 static int sprd_platform_compr_trigger(struct snd_compr_stream *cstream, cce13969 Baolin Wang 2019-03-27 100 int cmd); cce13969 Baolin Wang 2019-03-27 101 cce13969 Baolin Wang 2019-03-27 102 static void sprd_platform_compr_drain_notify(void *arg) cce13969 Baolin Wang 2019-03-27 103 { cce13969 Baolin Wang 2019-03-27 104 struct snd_compr_stream *cstream = arg; cce13969 Baolin Wang 2019-03-27 @105 struct snd_compr_runtime *runtime = cstream->runtime; ^^^^^^^^^^^^^^^^ cce13969 Baolin Wang 2019-03-27 106 struct sprd_compr_stream *stream = runtime->private_data; cce13969 Baolin Wang 2019-03-27 107 cce13969 Baolin Wang 2019-03-27 108 memset(stream->info_area, 0, sizeof(struct sprd_compr_playinfo)); cce13969 Baolin Wang 2019-03-27 109 cce13969 Baolin Wang 2019-03-27 @110 if (cstream) ^^^^^^^ cce13969 Baolin Wang 2019-03-27 111 snd_compr_drain_notify(cstream); cce13969 Baolin Wang 2019-03-27 112 } cce13969 Baolin Wang 2019-03-27 113 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation

2 1

[alsa-devel] [PATCH resend 0/3] ASoC: Intel: Misc. fixes
by Hans de Goede 03 Apr '19

03 Apr '19

Hi Pierre-Louis, Mark, These 3 patches (originally 2 different patch-sets) seem to have fallen through the cracks, hence this resend. Pierre-Louis, can you review these 3 patches please? Regards, Hans

3 7

[alsa-devel] [PATCH] ASoC: sprd: Fix modular build
by Mark Brown 03 Apr '19

03 Apr '19

Reported-by: Stephen Rothwell <sfr(a)canb.auug.org.au> Suggested-by: Baolin Wang <baolin.wang(a)linaro.org> Signed-off-by: Mark Brown <broonie(a)kernel.org> --- sound/soc/sprd/Makefile | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/sound/soc/sprd/Makefile b/sound/soc/sprd/Makefile index fa1d5476b8da..e6c2606da8e2 100644 --- a/sound/soc/sprd/Makefile +++ b/sound/soc/sprd/Makefile @@ -1,4 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 # Spreadtrum Audio Support -obj-$(CONFIG_SND_SOC_SPRD) += sprd-pcm-dma.o sprd-pcm-compress.o +snd-soc-sprd-platform-objs := sprd-pcm-dma.o sprd-pcm-compress.o + +obj-$(CONFIG_SND_SOC_SPRD) += snd-soc-sprd-platform.o -- 2.20.1

2 2

[alsa-devel] [RFC PATCH V2] ASoC: hdac_hdmi: add device PM dependency
by libin.yang＠intel.com 03 Apr '19

03 Apr '19

From: Libin Yang <libin.yang(a)intel.com> HDMI audio codec register operation depends on the display audio power domain. The hdmi audio codec dapm event callback must be called after display audio power is turned on. Add hdac_hdmi_device_link_add/del() in HDMI audio codec driver. The customer audio driver, such as cAVS/SST and SOF audio driver, can call the function to set/remove the audio power dependency. Signed-off-by: Libin Yang <libin.yang(a)intel.com> --- sound/soc/codecs/hdac_hdmi.c | 86 ++++++++++++++++++++++++++++++++++++++++++++ sound/soc/codecs/hdac_hdmi.h | 7 ++++ 2 files changed, 93 insertions(+) diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c index 5eeb0fe..7490219 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -133,6 +133,12 @@ struct hdac_hdmi_drv_data { int port_num; }; +/* each supplier - consumer pair has one instance of this structure */ +struct hdac_hdmi_dev_link { + struct list_head head; + struct device_link *link; +}; + struct hdac_hdmi_priv { struct hdac_device *hdev; struct snd_soc_component *component; @@ -141,10 +147,12 @@ struct hdac_hdmi_priv { struct list_head pin_list; struct list_head cvt_list; struct list_head pcm_list; + struct list_head link_list; /* supplier - consumer pairs */ int num_pin; int num_cvt; int num_ports; struct mutex pin_mutex; + struct mutex link_mutex; struct hdac_chmap chmap; struct hdac_hdmi_drv_data *drv_data; struct snd_soc_dai_driver *dai_drv; @@ -1792,6 +1800,72 @@ int hdac_hdmi_jack_init(struct snd_soc_dai *dai, int device, } EXPORT_SYMBOL_GPL(hdac_hdmi_jack_init); +/** + * hdac_hdmi_device_link_add - add a link between consumer and hdev device + * @consumer: Consumer end of the link. + * @component: The hdmi codec component. + * @flags: Link flags. + * + * If there is a consumer of the hdev device, which means a consumer device + * operation depends on the hdev device power status, the consumer device + * driver should call this function. It supports several consumers depending + * on the same hdmi codec hdev device. + * + * Return: pointer of device_link, or NULL if fails to create device_link + */ +struct device_link * +hdac_hdmi_device_link_add(struct device *consumer, + struct snd_soc_component *component, + u32 flags) +{ + struct hdac_hdmi_priv *hdmi = snd_soc_component_get_drvdata(component); + struct hdac_device *hdev = hdmi->hdev; + struct hdac_hdmi_dev_link *dev_link; + + dev_link = devm_kzalloc(&hdev->dev, sizeof(*dev_link), GFP_KERNEL); + if (!dev_link) + return NULL; + + dev_link->link = device_link_add(consumer, &hdev->dev, flags); + + mutex_lock(&hdmi->link_mutex); + if (dev_link->link) + list_add(&dev_link->head, &hdmi->link_list); + mutex_unlock(&hdmi->link_mutex); + + return dev_link->link; +} +EXPORT_SYMBOL_GPL(hdac_hdmi_device_link_add); + +/** + * hdac_hdmi_device_link_del - del the link between consumer and hdev device + * @consumer: Consumer end of the link. + * @component: The hdmi codec component. + * + * If the consumer doesn't need the dependency any longer, the consumer device + * driver should call this function to release the device_link + */ +void hdac_hdmi_device_link_del(struct device *consumer, + struct snd_soc_component *component) +{ + struct hdac_hdmi_priv *hdmi = snd_soc_component_get_drvdata(component); + struct hdac_device *hdev = hdmi->hdev; + struct hdac_hdmi_dev_link *dev_link, *tmp; + + mutex_lock(&hdmi->link_mutex); + list_for_each_entry_safe(dev_link, tmp, &hdmi->link_list, head) { + if (dev_link->link->consumer == consumer && + dev_link->link->supplier == &hdev->dev) { + device_link_del(dev_link->link); + list_del(&dev_link->head); + devm_kfree(&hdev->dev, dev_link); + return; + } + } + mutex_unlock(&hdmi->link_mutex); +} +EXPORT_SYMBOL_GPL(hdac_hdmi_device_link_del); + static void hdac_hdmi_present_sense_all_pins(struct hdac_device *hdev, struct hdac_hdmi_priv *hdmi, bool detect_pin_caps) { @@ -2031,7 +2105,9 @@ static int hdac_hdmi_dev_probe(struct hdac_device *hdev) INIT_LIST_HEAD(&hdmi_priv->pin_list); INIT_LIST_HEAD(&hdmi_priv->cvt_list); INIT_LIST_HEAD(&hdmi_priv->pcm_list); + INIT_LIST_HEAD(&hdmi_priv->link_list); mutex_init(&hdmi_priv->pin_mutex); + mutex_init(&hdmi_priv->link_mutex); /* * Turned off in the runtime_suspend during the first explicit @@ -2058,8 +2134,18 @@ static int hdac_hdmi_dev_probe(struct hdac_device *hdev) static int hdac_hdmi_dev_remove(struct hdac_device *hdev) { + struct hdac_hdmi_dev_link *dev_link, *tmp; + struct hdac_hdmi_priv *hdmi = hdev_to_hdmi_priv(hdev); + snd_hdac_display_power(hdev->bus, hdev->addr, false); + mutex_unlock(&hdmi->link_mutex); + list_for_each_entry_safe(dev_link, tmp, &hdmi->link_list, head) { + device_link_del(dev_link->link); + list_del(&dev_link->head); + } + mutex_unlock(&hdmi->link_mutex); + return 0; } diff --git a/sound/soc/codecs/hdac_hdmi.h b/sound/soc/codecs/hdac_hdmi.h index 4fa2fc9..e877167 100644 --- a/sound/soc/codecs/hdac_hdmi.h +++ b/sound/soc/codecs/hdac_hdmi.h @@ -7,4 +7,11 @@ int hdac_hdmi_jack_init(struct snd_soc_dai *dai, int pcm, int hdac_hdmi_jack_port_init(struct snd_soc_component *component, struct snd_soc_dapm_context *dapm); + +struct device_link * +hdac_hdmi_device_link_add(struct device *consumer, + struct snd_soc_component *component, + u32 flags); +void hdac_hdmi_device_link_del(struct device *consumer, + struct snd_soc_component *component); #endif /* __HDAC_HDMI_H__ */ -- 2.7.4

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