[yocto] [meta-raspberrypi][PATCH] make sound work out of the box for raspberrypi2

[Gary Thomas]

On 2015-03-23 10:42, Alex J Lennon wrote:
>
>
> On 23/03/2015 16:59, Gary Thomas wrote:
>> On 2015-03-22 14:21, Andreas Müller wrote:
>>> Signed-off-by: Andreas Müller <schnitzeltony at googlemail.com>
>>> ---
>>>    ...-during-boot-by-compiling-SND_BCM2835-int.patch | 38
>>> ++++++++++++++++++++++
>>>    recipes-kernel/linux/linux-raspberrypi_3.18.bb     |  8 +++--
>>>    2 files changed, 43 insertions(+), 3 deletions(-)
>>>    create mode 100644
>>> recipes-kernel/linux/linux-raspberrypi/0001-start-sound-during-boot-by-compiling-SND_BCM2835-int.patch
>>
>> I tried this patch (which downloaded very strangely using Thunderbird)
>> and the
>> kernel rebuilt fine.  I now have the audio detected, but still no
>> sound :-(
>> Again I've tried the internal (phono) speakers as well as HDMI audio.
>>
>> Just to prove a point on the [brand new] hardware, I installed
>> OpenELEC (XBMC)
>> and it works fine using the HDMI audio.  Sadly when I tried Raspbian
>> and Ubuntu
>> there was no sound either...
>>
>> Were you (Andreas) able to get any sound with this patch?
>
> Sorry to jump in on your conversation Gary but I am also doing some bits
> and pieces with meta-raspberrypi myself to test out my new-ish RPiv2.
>
> I'll have a look at changing the kernel configuration here later, but I
> did also try changing TEST_MODE in the config.txt which is billed as
> giving analogue audio and video out at startup. Sure enough I hear the
> startup beeps.
>
> Perhaps this would enable you to verify the hardware is working too?

Verified - this works.  Still no sound when I boot Poky/Yocto.

Have you tried audio output from Linux?

>
> The docs would seem to indicate that it should output a/v for the
> configured number of seconds whereas I see this continuously until I
> power cycle, but maybe that is a typo.
>
> http://www.raspberrypi.org/documentation/configuration/config-txt.md
>
> Regards, Alex
>

-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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