Category Archives: tech

ASoC updates in 2.6.33

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 [...]

Oh dear…

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.

ASoC updates in 2.6.32

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 [...]

Setting up regulator consumers with dev_name

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 [...]

ASoC updates in 2.6.31

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 [...]

Let’s hope people can make this work

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 [...]

Chasing patches into Linux

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 [...]

In-kernel audio mixing

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 [...]

Full quoting

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 [...]

Chrome is getting a Linux installer

Looks like Chrome is going to get a Linux installer like people have been asking for. Might be overkill, though.