[yocto] [meta-raspberrypi][PATCH v2 00/13] Support for VC4 graphics driver

Tue May 24 03:42:44 PDT 2016

Hi Piotr,

I know that the omxplayer would not build at this time, because VC4 and
userland will conflict, and currently omxplayer depends on userland.
I will check if it can be supported with VC4 driver enabled, but for the
moment it's true I disabled it in my build.

Regarding your patches:
1. Are you using linux kernel 4.4? You should set
PREFERRED_VERSION_linux-raspberrypi = "4.4.%" somewhere, either in your
distro configuration file, or your local.conf.
    If you do so, it should get kernel 4.4.10, which requires .dtbo files
for overlay. As mentioned in the patch, support for VC4 in 4.1 is not
stable, and therefore not supported.
2. I've seen only one TODO, did you make only one modification?
3. There are other patches that are needed to be applied, before this patch
series is applied: 2 for .dtbo support (1 in meta-raspberrypi, 1 in meta), 1
for mesa (to allow packaging with empty DRI).

I'll take a look at the omxplayer issue as soon as I can, in the meanwhile I
recommend to not use it...

Herve

-----Original Message-----
From: piotr.lewicki [mailto:piotr.lewicki at elfin.de] 
Sent: mardi 24 mai 2016 11:59
To: Herve Jourdain <herve.jourdain at neuf.fr>; yocto at yoctoproject.org
Subject: Re: [yocto] [meta-raspberrypi][PATCH v2 00/13] Support for VC4
graphics driver

I have tried these patches, but there were some hunks and errors during
applying to current master revision
(69840c0bbe03c2e61601e2377c8e2adc264e0478).
Building 'rpi-hwup-image' passed, but while building 'rpi-test-image' 
(omxplayer recipe) I have noticed some errors due to missing files:
- IL/OMX_Core.h
- VG/openvg.h
- bcm_host.h

I'm attaching omxplayer_build_errors.txt with build log and my patch with
changes created by Herve (adapted to current master revision) -
Support_for_VC4_graphics_driver.patch (Herve- if you decide to use that and
resend v3 of patches - please remove my TODO from
"conf/machine/include/rpi-base.inc"

Could you take a look at that and help me resolve those issues?

I currently have a problem that I'm forced to use Raspbian because playing
FHD/1080p videos with omxplayer from Yocto runs choppy (I'm not sure if
that's the right word, but playback is not smooth) while with Raspbian it
works perfect.
Do you think that enabling VC4 graphics driver can solve my issue?
Did any of you experienced similar problems? Do you have some other solution
or do you know what's the cause of this?

Thanks,
Piotr Lewicki

On 20.05.2016 13:51, Herve Jourdain wrote:
> This v2 series addresses the following issues with the first series:
> a. Fix the 4.4.10 kernel revision
> b. Effectively add vc4-kms-v3d overlay to the list of overlays to 
> build (forgotten previously) c. Make the parameter to the v4c-kms-v3d 
> overlay configurable d. Add default values for the cma parameter to 
> the v4c-kms-v3d overlay, depending on the board (and the memory it 
> has)
>
> This patch series enables the support for the VC4 graphics driver from
Eric Anholt.
> There was a previous patch series by Javier Martinez Canillas, but it
required use of a different kernel.
> VC4 is now supported in the raspberrypi official kernel, at least for
4.4.9+.
> The support in 4.1 exists, but it is NOT STABLE, so it has been deemed
unreasonable to support VC4 with 4.1 kernels.
>
> THEREFORE, VC4 graphics is supported ONLY for kernel versions 4.4.9 and
later.
>
> This patch series proposes to support VC4 by only adding 'vc4graphics' to
MACHINE_FEATURES, for raspberrypi. If this is set, it will trigger all the
necessary configuration/changes to use the VC4 driver, including
mesa/wayland/weston currently, and adding the overlay required.
> In order for this series to work, some previous patches are needed
(support for .dtbo, and fix of the mesa packaging when there is no DRI
driver).
> The memory reserved for the VC4 driver has default values depending on the
version of the board used, but it can be configured by setting VC4_CMA_SIZE
to a value supported by the overlay ('cma-256', 'cma-192', 'cma-128',
'cma-96', 'cma-64').
> 'cma-256' is the recommended value, but it might not be possible on boards
with 512MB or DRAM, or less...
> 'cma-64' is known to not being able to support FHD/1080p.
>
> It was tested with wayland/weston, without the support for X11.
>
> This patch series depends on two other patch series previously posted,
that enable the support for .dtbo overlay files.
>
> Herve Jourdain (13):
>    rpi-default-providers.inc: change default providers to support
>      vc4graphics
>    rpi-base.inc: add vc4-kms-v3d to the overlays to support vc4graphics
>    raspberrypi.conf: set the default value of VC4_CMA_SIZE to support
>      vc4graphics
>    raspberrypi0.conf: set the default value of VC4_CMA_SIZE to support
>      vc4graphics
>    raspberrypi2.conf: set the default value of VC4_CMA_SIZE to support
>      vc4graphics
>    raspberrypi3.conf: set the default value of VC4_CMA_SIZE to support
>      vc4graphics
>    firmware.inc: bump version to support vc4graphics
>    rpi-config_git.bb: add v4c overlay to config.txt to support
>      vc4graphics
>    wayland/weston_%.bbappend: modify configuration options to support
>      vc4graphics
>    weston/weston_%.bbappend: modify configuration options to support
>      vc4graphics
>    mesa_%.bbappend: new file to add the correct configuration options to
>      support vc4graphics
>    linux-raspberrypi_4.4.bb: bump the kernel revision to 4.4.10 to
>      support vc4graphics
>    linux-rpi.inc: add the configuration options required to support
>      vc4graphics
>
>   conf/machine/include/rpi-base.inc              |  1 +
>   conf/machine/include/rpi-default-providers.inc |  8 ++++----
>   conf/machine/raspberrypi.conf                  |  2 ++
>   conf/machine/raspberrypi0.conf                 |  2 ++
>   conf/machine/raspberrypi2.conf                 |  2 ++
>   conf/machine/raspberrypi3.conf                 |  2 ++
>   recipes-bsp/bootfiles/rpi-config_git.bb        | 10 +++++++++-
>   recipes-bsp/common/firmware.inc                |  4 ++--
>   recipes-graphics/mesa/mesa_%.bbappend          |  4 ++++
>   recipes-graphics/wayland/weston_%.bbappend     |  6 ++----
>   recipes-graphics/weston/weston_%.bbappend      | 13 +++++++------
>   recipes-kernel/linux/linux-raspberrypi_4.4.bb  |  4 ++--
>   recipes-kernel/linux/linux-rpi.inc             | 10 ++++++++++
>   13 files changed, 49 insertions(+), 19 deletions(-)
>   create mode 100644 recipes-graphics/mesa/mesa_%.bbappend
>