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

[Gary Thomas]

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?

> diff --git a/recipes-kernel/linux/linux-raspberrypi/0001-start-sound-during-boot-by-compiling-SND_BCM2835-int.patch b/recipes-kernel/linux/linux-raspberrypi/0001-start-sound-during-boot-by-compiling-SND_BCM2835-int.patch
> new file mode 100644
> index 0000000..cb06253
> --- /dev/null
> +++ b/recipes-kernel/linux/linux-raspberrypi/0001-start-sound-during-boot-by-compiling-SND_BCM2835-int.patch
> @@ -0,0 +1,38 @@
> +From dc6d02c68956a1833bd30159d4e411f1515db66e Mon Sep 17 00:00:00 2001
> +From: =?UTF-8?q?Andreas=20M=C3=BCller?= <schnitzeltony at googlemail.com>
> +Date: Wed, 18 Mar 2015 23:51:37 +0100
> +Subject: [PATCH] start sound during boot by compiling SND_BCM2835 into kernel
> +MIME-Version: 1.0
> +Content-Type: text/plain; charset=UTF-8
> +Content-Transfer-Encoding: 8bit
> +
> +Signed-off-by: Andreas Müller <schnitzeltony at googlemail.com>
> +---
> + arch/arm/configs/bcm2709_defconfig | 4 ++--
> + 1 file changed, 2 insertions(+), 2 deletions(-)
> +
> +diff --git a/arch/arm/configs/bcm2709_defconfig b/arch/arm/configs/bcm2709_defconfig
> +index b5bf4cb..426f2ed 100644
> +--- a/arch/arm/configs/bcm2709_defconfig
> ++++ b/arch/arm/configs/bcm2709_defconfig
> +@@ -765,7 +765,7 @@ CONFIG_LOGO=y
> + # CONFIG_LOGO_LINUX_MONO is not set
> + # CONFIG_LOGO_LINUX_VGA16 is not set
> + CONFIG_SOUND=y
> +-CONFIG_SND=m
> ++CONFIG_SND=y
> + CONFIG_SND_SEQUENCER=m
> + CONFIG_SND_SEQ_DUMMY=m
> + CONFIG_SND_MIXER_OSS=m
> +@@ -778,7 +778,7 @@ CONFIG_SND_VIRMIDI=m
> + CONFIG_SND_MTPAV=m
> + CONFIG_SND_SERIAL_U16550=m
> + CONFIG_SND_MPU401=m
> +-CONFIG_SND_BCM2835=m
> ++CONFIG_SND_BCM2835=y
> + CONFIG_SND_USB_AUDIO=m
> + CONFIG_SND_USB_UA101=m
> + CONFIG_SND_USB_CAIAQ=m
> +--
> +1.9.3
> +
> diff --git a/recipes-kernel/linux/linux-raspberrypi_3.18.bb b/recipes-kernel/linux/linux-raspberrypi_3.18.bb
> index 921e702..053e892 100644
> --- a/recipes-kernel/linux/linux-raspberrypi_3.18.bb
> +++ b/recipes-kernel/linux/linux-raspberrypi_3.18.bb
> @@ -1,8 +1,10 @@
>   LINUX_VERSION ?= "3.18.5"
>
>   SRCREV = "a6cf3c99bc89e2c010c2f78fbf9e3ed478ccfd46"
> -SRC_URI = "git://github.com/raspberrypi/linux.git;protocol=git;branch=rpi-3.18.y \
> -           file://sl030raspberrypii2ckernel.patch \
> -          "
> +SRC_URI = " \
> +    git://github.com/raspberrypi/linux.git;protocol=git;branch=rpi-3.18.y \
> +    file://sl030raspberrypii2ckernel.patch \
> +    file://0001-start-sound-during-boot-by-compiling-SND_BCM2835-int.patch \
> +"
>
>   require linux-raspberrypi.inc
>

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