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

[Alex J Lennon]

On 24/03/2015 08:21, Andreas Müller wrote:
> On Tue, Mar 24, 2015 at 12:14 AM, Gary Thomas <gary at mlbassoc.com> wrote:
>> On 2015-03-23 16:22, Andreas Müller wrote:
>>> On Mon, Mar 23, 2015 at 10:43 PM, Gary Thomas <gary at mlbassoc.com> wrote:
>>>> On 2015-03-23 14:57, Andreas Müller wrote:
>>>>>
>>>>> On Mon, Mar 23, 2015 at 4:59 PM, Gary Thomas <gary at mlbassoc.com> 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?
>>>>>>
>>>>> Yes but I have used 3.5mm sound output - Should have mentioned that in
>>>>> commit. I guess there is to enable something else in kernel config for
>>>>> HDMI. Will look into that
>>>>
>>>>
>>>> I've tried the 3.5mm jack as well but nothing seems to come out.
>>>> I even tried booting with the HDMI missing (powered off) in case
>>>> that was causing some confusion.
>>>>
>>>> Did you make any changes to config.txt to get this going?
>>> No
>>>>
>>> Have my standard xfce-image with xfce4-mixer and as mentioned out of
>>> the box: I can hear sound / change volume...
>>
>> Would it be possible to share your [bootable] image?
>>
>>> What does happen if you start alsamixer - if it is installed on your
>>> image?
>>
>> alsamixer looks correct.
>>
>> BTW, I've tried this on my RaspberryPi Model B and I don't get any sound
>> from it either :-(  Again, booting with test_mode=1 shows that the hardware
>> is working, just not in Linux. I'm sure I've tried this in the past with
>> success so I'm becoming more and more confused...
>>
> For sharing I need to create a smaller image - the current one
> contains all stuff from meta-games, all browsers and more. Hope to get
> that done tomorrow evening. What is the preferred way of sharing huge
> files?
>

Circling around this a little, hello_audio built out of vc_graphics
works too over the audio jack

Alex