On Fri, 08 Jan 2016 11:46:23 +0100, Russell King - ARM Linux wrote: > > Given that, I'd like to throw in here another detail: iirc, i915's > HDMI exports the ELD to userspace via a control called "ELD" - see > eld_bytes_ctl in sound/pci/hda/patch_hdmi.c. This allows userspace > to monitor, and read the ELD including which compressed audio formats > are supported. I'm not currently aware of anything that makes use of > this, but as there is this precedent for exporting this information, > maybe it should become a standard way, so that video playback > applications can then select an appropriate audio stream depending on > the current properties of the connected device? Right, the ELD ctl elements were introduced exactly for such a purpose. Though, I'm not sure currently which user-space app is actually referring to this information, too. But certainly it's a good thing to have for other drivers. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
