On 11/04/2015 12:49 AM, Takashi Iwai wrote:
On Tue, 03 Nov 2015 09:42:54 +0100,
libin.yang@xxxxxxxxxxxxxxx wrote:
From: Libin Yang <libin.yang@xxxxxxxxxxxxxxx>
This is the patch set for Jack support for DP MST audio
Libin Yang (2):
ALSA: hda - jack support DP MST audio
ALSA: hda - hdmi audio add dynamically jack binding to pin
I'm somehow confused by this patch series.
Is the unsolicited event handling itself changed for MST? I mean, you
cannot know which MST dev# is given beforehand, while you seem trying
to assign such a number to the jack object.
Oh, sorry I forgot to mention that we only operate on device entry 0
so far in the code. It's misleading.
These patches don't operate on MST audio. The full MST audio driver
support will be implemented in the later patches. The patches help to
prepare supporting MST audio.
The purpose of the patches is try to dynamically attach the Jack.
We create all jacks statically at probe time. And in MST case, each
jack is still supposed to be corresponding to each PCM stream, not to
each pin. So I don't see how this fits with the big picture.
In the generic_hdmi_build_jack(), it will create the snd_jack based on
the pcm. This is for the userspace. So userspace can see the Jack
number is the same as PCM. The first Jack for the first PCM, and so
on. And it is not attached to any pin at first.
In generic_hdmi_build_controls(), it will also create hda_jack_tbl
based on the pin. The hda_jack_tbl will record the pin information.
When hotplug, in the hdmi_present_sense(), it will call
xxx_jack_bind() to bind the snd_jack to hda_jack_tbl
A bit more explanation is needed.
I will. Thanks.
Best Regards,
Libin
thanks
Takashi
sound/pci/hda/hda_jack.c | 186 ++++++++++++++++++++++++++++++++++++++++-----
sound/pci/hda/hda_jack.h | 32 +++++++-
sound/pci/hda/patch_hdmi.c | 116 ++++++++++++++++++++++------
3 files changed, 288 insertions(+), 46 deletions(-)
--
1.9.1
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