November 2016 - Alsa-devel - mailman.alsa-project.org

[alsa-devel] [RFC 00/14] SoundWire bus driver
by Hardik Shah 17 Nov '16

17 Nov '16

Following RFC series adds SoundWire bus driver interface based on the MIPI SoundWire specification 1.1 The SoundWire protocol is a robust, scalable, low complexity, low power, low latency, two-pin (clock and data) multi-drop bus that allows for the transfer of multiple audio streams and embedded control/commands. SoundWire provides synchronization capabilities and supports both PCM and PDM, multichannel data, isochronous and asynchronous modes. SoundWire does borrow a number of concepts from existing interfaces such as HDAudio, AC97, SLIMbus, which already provide control/audio on the same wires, or legacy interfaces such as I2C/I2S, TDM, PDM. The capabilities of SoundWire make it unique however in that it can be implemented in peripherals such as microphones or amplifiers, mix PCM and PDM formats and enable clock scaling to reduce power consumption. More details about the SoundWire protocol can be obtained from MIPI website as listed below (accessible to members only). 1. http://mipi.org/learning-center/webinars 2. https://members.mipi.org/wg/All-Members/document/download/65078 3. https://members.mipi.org/wg/Contributors/document/70055 Hardik Shah (12): SoundWire: Add SoundWire bus driver documentation SoundWire: Add SoundWire stream documentation SoundWire: Add error handling and locking documentation SoundWire: Add device_id table for SoundWire bus SoundWire: Add SoundWire bus driver interfaces SoundWire: Add register/unregister APIs SoundWire: Add SoundWire Slaves register definitions SoundWire: Add API for Slave registers read/write SoundWire: Add support to handle Slave status change SoundWire: Add support for clock stop SoundWire: Add tracing for Slave register read/write regmap: SoundWire: Add regmap support for SoundWire bus Sanyog Kale (2): SoundWire: Add stream and port configuration SoundWire: Add support for SoundWire stream management Documentation/sound/alsa/sdw/error_handling.txt | 71 + Documentation/sound/alsa/sdw/locking.txt | 64 + Documentation/sound/alsa/sdw/stream.txt | 346 +++ Documentation/sound/alsa/sdw/summary.txt | 253 ++ MAINTAINERS | 12 + drivers/base/regmap/Kconfig | 3 + drivers/base/regmap/Makefile | 1 + drivers/base/regmap/regmap-sdw.c | 240 ++ include/linux/mod_devicetable.h | 13 + include/linux/regmap.h | 37 + include/sound/sdw/sdw_registers.h | 277 ++ include/sound/sdw_bus.h | 905 ++++++ include/sound/sdw_master.h | 627 ++++ include/sound/sdw_slave.h | 563 ++++ include/trace/events/sdw.h | 209 ++ sound/Kconfig | 2 + sound/Makefile | 1 + sound/sdw/Kconfig | 6 + sound/sdw/Makefile | 1 + sound/sdw/sdw.c | 3749 +++++++++++++++++++++++ sound/sdw/sdw_priv.h | 811 +++++ sound/sdw/sdw_runtime.c | 2807 +++++++++++++++++ 22 files changed, 10998 insertions(+) create mode 100644 Documentation/sound/alsa/sdw/error_handling.txt create mode 100644 Documentation/sound/alsa/sdw/locking.txt create mode 100644 Documentation/sound/alsa/sdw/stream.txt create mode 100644 Documentation/sound/alsa/sdw/summary.txt create mode 100644 drivers/base/regmap/regmap-sdw.c create mode 100644 include/sound/sdw/sdw_registers.h create mode 100644 include/sound/sdw_bus.h create mode 100644 include/sound/sdw_master.h create mode 100644 include/sound/sdw_slave.h create mode 100644 include/trace/events/sdw.h create mode 100644 sound/sdw/Kconfig create mode 100644 sound/sdw/Makefile create mode 100644 sound/sdw/sdw.c create mode 100644 sound/sdw/sdw_priv.h create mode 100644 sound/sdw/sdw_runtime.c -- 1.7.9.5

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[alsa-devel] Lenovo Dock + Thinkpad X260 -> no HDMI audio output
by Norbert Preining 17 Nov '16

17 Nov '16

Dear all, (please cc) I am trying to get HDMI audio output via a Lenovo Dock Ultra in combination with a Lenovo Thinkpad X260. When plugging the HDMI device (screen) directly into the laptop, audio output can be selected in pavucontrol / Configuration, but when the laptop is connected via the dock all the HDMI devices appear as unplugged. I have googled a bit and found a similar case for T430: http://permalink.gmane.org/gmane.linux.alsa.user/36896 and checking the source code of snd_hda_intel it seems that options snd-hda-intel model=lenovo-dock should help, but indeed it didn't. I am running Debian/sid, on today's git kernel (4.9.0-rc5+). I attach the output of alsa-info. Please let me know whether I can try some more tweaks. Thanks a lot Norbert -- PREINING Norbert + TeX Live & Debian Developer + http://www.preining.info GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13

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[alsa-devel] [MINUTES] Linux Plumbers Audio Mini Conference - Santa Fe 2016
by Liam Girdwood 16 Nov '16

16 Nov '16

Minutes below. Comments, corrections and omissions welcomed. We are missing some links to some of the slides presented. Please reply with a link if you have one. Audio Mini Conference Minutes - Santa Fe 2016 ============================================= Present: Mark, Rakesh, Liam, Vinod, Mengdong, Pierre, Patrick, Takashi S, Javilars, Takashi I, Eric, Dylan, Mauro, Shuah, Charles, Matthew, Lars, Sagar and others. Android USB Audio - Eric ======================== USB audio is becoming more important as analog jack can be removed. USB stack is difficult to optimise for low power/latency audio (too many wake ups with USB 1ms tick). Aim to add no_irq (no IRQ for each period) and mmap support in USB 3.0 stack to improve power and latency. USB playback and capture with synchronised start API is missing from stack/ALSA. Some patches were posted for synchronised endpoint but never made it to the list, Pierre is going to resend. USB currently defines simple audio endpoints. Support is needed to define more complex USB audio endpoints rather than just "playback" and "capture". Sub 10ms latency (round trip ?) is difficult to achieve on USB due to stack and drivers. Mmap may help reduce latency by removing buffer copies. Inter Device Dependencies ========================= Kernel Summit joined for this discussion. There is complexity between devices, more than just a parent/child relationship for some devices making it difficult to order probing and PM ops. Rafael, has created patch set to solve dependences for PM ops in Gregs tree, the patches could also be used for probing. The patches add an API to allow device relationships to be established as a graph. This API supports non parent/child relationships to and allows PM ops to run in a deterministic sequence. Relationship dependency discovery needs to come from DT/ACPI and will need standardised bindings. Mark described the current audio workarounds where the machine driver specifies relationships and deferred probe is used to manage the probing sequence. Some people do not like the high number deferred probe messages in dmesg. Relation graphs must be ordered so that cycles to do not exist. Next steps are to use Rafaels patches for probe ordering. AV Sync - Eric =============== A few frame counters are 32 bit (compressed API) and should be 64 bit. Vinod will update compressed API to 64 bit. Timers should also consider boot time and suspend/resume time as it's currently difficult to keep AV syn over suspend/resume cycles. AV sync on TV's hacky atm, we need AV sync API in ALSA. Takashi noted this was long time problem that needs solution. Some options for AV sync were pseudo transport streams (like existing mpeg format) but these were difficult for mmap(). Other devices had used runtime PLL updating with patches sent in the past ? Compressed API could be used to send transport stream for AV sync. HDMI/DP glue to GFX - Vinod =========================== Currently several interlaces exist to pass DP/HDMI events and information between audio and GFX stacks/drivers. ARM devices using pdata interface, i915 has another solution, BYT uses another interface. Needs to be consistent for user space ELD notification, jack detection/mapping. Currently HDA drivers have hack to assist userspace (PCM5). There are also difficulties mapping PCMs, channels and jacks to multiple HDMI/DP devices. Tikashi and Vinod to investigate best solutions. DP-MST - Vinod =============== Jack notifications more difficult with MST (extra complexity). How do we map multiple jacks from multiple monitors, disable unused pins when not rendering ? The 5.1 use case for gaming has to split channels to multiple monitors. Decision is that new devices would export topology to userpace so that userspace know the jack, channel mappings. Soundwire Support - Rakesh and Pierre ===================================== Soundwire new hardware interface for audio devices. Needs new subsystem support for soundwire master and slave devices. Hardik has posted initial RFC to the list for review. Rakesh presented slides . Link to the slides ? Some people had reviewed the RFC. Some changes to strct device/driver usage required to make it more like other subsystems upstream. There is also need to deal with devices that can power off after or before enumeration. Some confusion over the terminology used too, compared to other bus systems like I2C. Master should be device and not driver. Top level feedback is that it does not look like bus code. There is also a need to consider objects in DT/ACPI. AR Vinod, to look at STIO. Topology and UCM file deployment - Vinod, Mengdong, Liam ======================================================== Difficult to release and deploy topology/ucm updates with alsa-lib cadence. Distros to be contacted for best deployment where cadence can be faster than alsa-lib. Liam and Vinod to contact distro package maintainers. UCM - Liam, Mengdong ==================== Which driver card name string to change, there are 3 - long, short and driver. CRAS uses the string in the []. Not sure about PA. Liam to create patch that includes machine name in card name string. Mengdong has added #include and #define like support to topology. Mengdong will port this to UCM too so that a library of codecs can be built up and included by the machine ucm files. e.g. Asus T100 UCM would include rt5640 codec and baytrail DSP UCM configs. Tracepoint for audio - Lars, Takashi S ====================================== Lars and Takashi S have similar patchsets. Easy to make tooling for parsing traceout. This could replace printk and snd_printk, but builds bigger binary. Option to disable can be added to reduce size. Uses ftrace output and timestamp. Used in the PCM operations. Patches are still WiP and will be posted as RFC when ready. Dropping Dice Driver - Takashi S ================================ Dice hardware has serious problems making it unusable. Takashi S to discuss with Clemens regarding any potential work around for HW issue. If no work around is found then it could be marked as broken or moved to staging ? Sound Open Firmware - Liam ========================== Liam introduced SOF and took QA. Liam is also working on an ELF executable firmware image that can run on the developers host PC. http://alsa-project.org/main/index.php/Firmware Paravirtualisation of Audio Drivers - Rakesh ============================================ Safety critical systems have requirements to play safety critcal sounds (like alarms, warnings) and regular non safety critical sound like media. Rakesh proposed a Xen hypervisor method to guarantee the safety critical audio would always take precedence over the non safety critical audio. Xen would run a privileged OS (for safety critical) and unprivileged OS (for non safety critical audio). A para virtualised audio driver would allow the Unprivileged OS to play audio on the privileged OS. Lars suggested Libvirt and KVM may make this task far easier and less restricted than using Xen. Rakesh to investigate further. Userspace driver for Firewire - Takashi S ========================================= Need to represent mixers for some USB and FW devices in userspace. Why ?. Possibility of using topology for userspace. Nobody keen on exposing kernel APIs as userspavce ABIs. Possibility of looking at libvirt interfaces for userspace drivers many similarities. Kernel component, already use FW sound card. Mixer API not suitable, many bus so use control API. ALSA Stream Configuration Domains - Lars ======================================== ALSA has powerful but complex system to configure and constrain stream configurations at runtime but it does not scale well on modern ASoC based sound devices with multiple components and DAIs. Lars presented a solution that can break complex sound cards down to simple domains where configuration can be set by userspace to exactly match each use case. Userspace would also be able to read the configuration in each domain. New APIs calls would be needed in alsa-lib to achieve this. Lars also requested that ASoC become a first class citizen with ALSA since most new sound cards are ASoC based. Proposal was accepted.

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[alsa-devel] Alsa io plugin crash question
by Hermes Zhang 16 Nov '16

16 Nov '16

Hi all, I am try to write a plugin in alsa io plugin mode static snd_pcm_sframes_t my_read (snd_pcm_ioplug_t * io, const snd_pcm_channel_area_t * areas, snd_pcm_uframes_t offset, snd_pcm_uframes_t size) { } In above function, I will copy the audio data to areas with calculate the offset like this: memcpy((char *) areas->addr + (areas->first + areas->step * offset) / 8, data, size); But after serveral calls, the application crash, and I print the "offset" value, it seem always increase, when reach one number (e.g. 66560) it crash. So my question is: is the "offset" value always increase is expected? Or does it should like a ring buffer, so it should start from begin again? I see there is hw_pointer and app_pointer, but they are both read_only, right? How could we adjust the read pointer? Thanks. BTW, I test the plugin in this way: arecord -D my_plug -c 1 -f S16_LE raw Best Regards, Hermes

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[alsa-devel] [RFC PATCH 0/3] Add support for component devices
by mengdong.lin＠linux.intel.com 16 Nov '16

16 Nov '16

From: Mengdong Lin <mengdong.lin(a)linux.intel.com> Sound cards are defined by machines. And off-soc codecs and DSPs embedded in DSP can be taken as the components and resued by different machines/ sound cards. This series allows codec and SOC vendors to install UCM configuration files for a specific codec or DSP, and sound card verb files can just include these conf files of components, and trigger enable/ disable sequence defined by the component devices. Component devices will not be exposed to applications for backward compatibility. So audio servers like PulseAudio and CRAS still only see the machine devices. Mengdong Lin (3): ucm: Skip component directories when scanning sound card configuration files ucm: Parse sequence of component devices ucm: Execute sequence of component devices src/ucm/main.c | 98 ++++++++++++++++++++++++++++++++++++----- src/ucm/parser.c | 122 +++++++++++++++++++++++++++++++++++++++++++++++++++- src/ucm/ucm_local.h | 11 +++++ src/ucm/utils.c | 1 + 4 files changed, 220 insertions(+), 12 deletions(-) -- 2.7.4

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[alsa-devel] [PATCH v9 0/3] ASoC: MT8173 HDMI jack detection
by Philipp Zabel 16 Nov '16

16 Nov '16

Hi, now that a new HDMI state notifier RFC has been posted [1], I've updated this series to use it instead of the previous prototype. I've also sent the drm/mediatek part of this series separately [2], which is needed to actually generate the events the hdmi-codec driver listens for. Changes since v8: - Dropped the HDMI notification prototype patch - Rebased onto the "video: add HDMI state notifier support" patch by Hans Verkuil, based on Russell King's earlier version. - Dropped the drm/mediatek patch regards Philipp [1] https://patchwork.linuxtv.org/patch/38109/ [2] https://patchwork.kernel.org/patch/9430337/ Philipp Zabel (3): ASoC: hdmi-codec: use HDMI state notifier to add jack support ASoC: mediatek: Add jack detection support to mt8173-rt5650-rt5676 machine driver ASoC: mediatek: Add jack detection support to the mt8173-rt5650 machine driver include/sound/hdmi-codec.h | 7 ++ sound/soc/codecs/Kconfig | 1 + sound/soc/codecs/hdmi-codec.c | 107 +++++++++++++++++++++-- sound/soc/mediatek/mt8173/mt8173-rt5650-rt5676.c | 42 +++++++++ sound/soc/mediatek/mt8173/mt8173-rt5650.c | 42 +++++++++ 5 files changed, 191 insertions(+), 8 deletions(-) -- 2.10.2

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[alsa-devel] [PATCH v3 00/17] ASoC: add OF graph base simple-card
by Kuninori Morimoto 16 Nov '16

16 Nov '16

Hi Rob, Mark These are v3 of OF graph base simple-card patch-set. 1) - 5) : soc-core prepare for OF graph base simple-card 6) - 10) : OF graph new feature 11) - 17) : OF graph base simple-card (depends on above 2 patch-set) >> Mark I could success to apply 1) - 5) on your topic/core and topic/simple, both. Please let me know if you can't do it. *** BLURB HERE *** Kuninori Morimoto (17): 1) ASoC: soc-core: adjust for graph on snd_soc_of_parse_card_name 2) ASoC: soc-core: adjust for graph on snd_soc_of_parse_audio_simple_widgets 3) ASoC: soc-core: adjust for graph on snd_soc_of_parse_audio_routing 4) ASoC: soc-core: adjust for graph on snd_soc_of_parse_audio_prefix 5) ASoC: soc-core: snd_soc_get_dai_name() become non static 6) of_graph: add of_graph_get_remote_endpoint() 7) of_graph: add of_graph_get_port_parent() 8) of_graph: add of_graph_get_top_port() 9) of_graph: add for_each_of_port() / for_each_of_endpoint_in_port() 10) of_graph: add of_graph_get_port/endpoint_count() 11) ASoC: simple-card-utils: add asoc_simple_card_parse_graph_dai() 12) ASoC: simple-card-utils: add asoc_simple_card_try_to_probe_graph_card() 13) ASoC: simple-card-utils: adjust for graph on asoc_simple_card_parse_card_name 14) ASoC: add simple-graph-card document 15) ASoC: add simple-graph-card support 16) ASoC: add simple-graph-scu-card document 17) ASoC: add simple-graph-scu-card support .../bindings/sound/simple-graph-card.txt | 65 +++ .../bindings/sound/simple-graph-scu-card.txt | 65 +++ drivers/of/base.c | 160 ++++++- include/linux/of_graph.h | 54 +++ include/sound/simple_card_utils.h | 19 + include/sound/soc.h | 32 +- sound/soc/generic/Kconfig | 15 + sound/soc/generic/Makefile | 4 + sound/soc/generic/simple-card-utils.c | 98 ++++- sound/soc/generic/simple-card.c | 2 +- sound/soc/generic/simple-graph-card.c | 462 +++++++++++++++++++++ sound/soc/generic/simple-graph-scu-card.c | 417 +++++++++++++++++++ sound/soc/generic/simple-scu-card.c | 2 +- sound/soc/soc-core.c | 41 +- 14 files changed, 1401 insertions(+), 35 deletions(-) create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-card.txt create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-scu-card.txt create mode 100644 sound/soc/generic/simple-graph-card.c create mode 100644 sound/soc/generic/simple-graph-scu-card.c -- 1.9.1

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[alsa-devel] [PATCH] ASoC: wm8580: tidyup Kconfig tristate title
by Kuninori Morimoto 16 Nov '16

16 Nov '16

From: Kuninori Morimoto <kuninori.morimoto.gx(a)renesas.com> It is WM8580, not WM8523 Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx(a)renesas.com> --- sound/soc/codecs/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index c67667b..f1c48d2 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -914,7 +914,7 @@ config SND_SOC_WM8523 depends on I2C config SND_SOC_WM8580 - tristate "Wolfson Microelectronics WM8523 CODEC" + tristate "Wolfson Microelectronics WM8580 CODEC" depends on I2C config SND_SOC_WM8711 -- 1.9.1

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[alsa-devel] [PATCH] ASoC: rl6231: add 19.2M to 4.096M pll preset table
by Bard Liao 15 Nov '16

15 Nov '16

Add a pll mapping table for 19.2M in and 4.096M out. Signed-off-by: Bard Liao <bardliao(a)realtek.com> --- sound/soc/codecs/rl6231.c | 1 + 1 file changed, 1 insertion(+) diff --git a/sound/soc/codecs/rl6231.c b/sound/soc/codecs/rl6231.c index 1dc68ab..7b447d0 100644 --- a/sound/soc/codecs/rl6231.c +++ b/sound/soc/codecs/rl6231.c @@ -102,6 +102,7 @@ struct pll_calc_map { }; static const struct pll_calc_map pll_preset_table[] = { + {19200000, 4096000, 23, 14, 1, false}, {19200000, 24576000, 3, 30, 3, false}, }; -- 1.8.1.1.439.g50a6b54

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[alsa-devel] [PATCH 0/2] ASoC: omap-twl4030: remove legacy code
by Nicolae Rosia 15 Nov '16

15 Nov '16

This patch series removes the omap-twl4030 platform data since all users are now device tree based. These patches are based on Tony's omap-for-v4.10/legacy branch [0] and also on [1]. [0] https://git.kernel.org/cgit/linux/kernel/git/tmlind/linux-omap.git/log/?h=o… [1] https://patchwork.kernel.org/patch/9424067/ Nicolae Rosia (2): ASoC: omap-twl4030: rework probing for device tree only mfd: twl4030-audio: make module DT only drivers/mfd/twl4030-audio.c | 46 ++-------- include/linux/i2c/twl.h | 23 ----- include/linux/platform_data/omap-twl4030.h | 58 ------------- sound/soc/codecs/twl4030.c | 8 ++ sound/soc/omap/omap-twl4030.c | 133 ++++++++++------------------- 5 files changed, 61 insertions(+), 207 deletions(-) delete mode 100644 include/linux/platform_data/omap-twl4030.h -- 2.7.4

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