Linux 2.6.34 was released today. This contains a fairly substantial batch of ASoC updates, including: Support for turning CODEC biases off completely when idle, providing power savings for modern devices with ground referenced outputs where this can be done quickly at runtime without pops and clicks. Support for disabling physical writes to the device in [...]
I’ve had the opportunity to use a bunch of different smartphone OSs for extended periods recently. They’ve all taken interestingly different tacks on some of the key stuff, normally all within the bounds of reasonable implementation decisions but with very different results and useful to different people. One of the most interesting decisions I’ve noticed [...]
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 [...]
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 [...]
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 [...]
The new PS3 firmware has an iPlayer client with fullscreen support. It’s not quite broadcast SD quality, never mind HD, but that’s a fairly straightforward problem to resolve and sitting using it last night I couldn’t help but think that this is exactly how TV should work. Full TV screen, on demand and a good [...]
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 [...]