This has been another fairly quiet release for ASoC. Aside from the addition of virtual mux support to DAPM and some further preparatory work for multi-CODEC cards the majority of changes have been driver updates, including:
New CODEC drivers for ADS117x, AK4671, TLV320DAC33, TPA6130A2, WM8711 and WM8727.
Support for the PCM port on Samsung SoCs.
Substantial improvements to DMA [...]
Subject: zlib_1.2.3.3.dfsg-16_amd64.changes REJECTED
Reject Reasons:
lib32z1: lintian output: ‘embedded-zlib ./usr/lib32/libz.so.1.2.3.3′,
+automatically rejected package.
lib32z1: If you have a good reason, you may override this lintian tag.
I guess I should’ve actually reported the lintian bug rather than just ignoring the bogus warning.
Linux 2.6.32 was released overnight. This has been a fairly busy release for ASoC, with changes including:
Redone power sequencing code, giving shorter power sequences which
should reduce the effect of any artifacts that exist.
Reporting of power management decisions via debugfs, enabling much
easier diagnosis of path setup problems.
Beginning of work to factor out the register access and [...]
The Linux kernel regulator API requires that each system sets up the connections between the various voltage and current regulators in the system and the devices they supply, known as consumers within the regulator API. This is done using the struct device for the consumer device as the key for consumer access. This works well [...]
Linux 2.6.31 was released today. This was a fairly busy release for the ASoC subsystem, with updates including:
DAPM supply widget, for automatically managing things like charge pumps and gateable clocks which may be used by more than one widget.
Core support for setting up constraints for symmetric sample rates (for systems with a shared LRCLK).
Support for [...]
One thing that often seems to cause problems for people who work over many different areas of the Linux kernel is the process of making sure that patches actually get reviewed and applied. Where the relevant subsystem is actively maintained it’s not a problem but that’s not always the case. Sometimes maintainers are busy or [...]
Ever since PulseAudio started to be deployed by distributions the most common complaint I’ve seen about ALSA is that unlike current versions of OSS it doesn’t provide mixing of audio from multiple applications inside the kernel. Of course what it really comes down to is that people want the system to transparently allow multiple applications [...]
There’s a long standing idea tha one should make an effort to trim out text from the original which is not germane to the new content in your reply. This is not just a bandwidth thing, it’s also about decreasing the effort required for the readers to parse the message – to locate the new [...]
Linux 2.6.30 was released today. This has been a fairly quiet release from the ASoC point of view with no substantial API changes for drivers but there’s a few new interfaces which people may find helpful. Highlights include:
A simple wrapper for the standard ALSA jack detection interface. This helps makes jacks a bit easier to [...]
I recently implemented some enhancements to DAPM, the part of ASoC which minimizes the power consumption of the embedded audio subsystem by keeping any unused components powered off while avoiding audible artifacts as the power changes. Prior to these changes DAPM used to change the power for each component with an individual register write which [...]