[yocto] [meta-raspberrypi][PATCH v2 4/4] README: Add a section about graphic stacks

[Javier Martinez Canillas]

Hello Andrei and Khem,

Thanks a lot for your feedback.

On 08/17/2015 09:57 AM, Andrei Gherzan wrote:
> Hello,
> 
> On Thursday, August 13, 2015, Khem Raj <raj.khem at gmail.com> wrote:
> 
>>
>>> On Aug 13, 2015, at 10:07 AM, Javier Martinez Canillas <
>> javier at osg.samsung.com <javascript:;>> wrote:
>>>
>>> This patch adds to the README a section that explains the RPi can
>> different
>>> graphics stacks and that the user can choose by manually changing
>> providers.
>>>
>>> Signed-off-by: Javier Martinez Canillas <javier at osg.samsung.com
>> <javascript:;>>
>>>
>>> ---
>>>
>>> Changes in v2: None
>>>
>>> README | 9 +++++++++
>>> 1 file changed, 9 insertions(+)
>>>
>>> diff --git a/README b/README
>>> index 678c0eb4a4e3..0569b353870c 100644
>>> --- a/README
>>> +++ b/README
>>> @@ -25,6 +25,7 @@ Contents:
>>>     2.K. Boot to U-Boot
>>>     2.L. Image with Initramfs
>>>     2.M. Device tree support
>>> +    2.O. Graphic stacks
>>> 3. Extra apps
>>>     3.A. omxplayer
>>> 4. Source code and mirrors
>>> @@ -195,6 +196,14 @@ kernels.
>>> NOTE: KERNEL_DEVICETREE is default enabled for kernel >= 3.18 and always
>> disabled for
>>>       older kernel versions.
>>>
>>> +2.O. Graphic stacks
>>> +===================
>>> +The Raspberry Pi boards can use one of two graphics stacks: The userland
>>> +user-space driver or the vc4 DRM/KMS kernel driver. By default userland
>>> +is used since the vc4 is still experimental. But this can be changed by
>>> +modifying the defaults for the kernel, egl, gles2, libgl and mesa
>> providers.
>>> +This is explained in the conf/machine/include/rpi-default-providers.inc
>> file.
>>> +
>>
>> you may want to add pointer to the commented out code that you have added
>> to select them
>> in rpi-default-providers.inc
>>
> 
> It would be nice to have some detailed info on what and where to comment
> out the configuration.
>

On patch 3/4 I added that documentation to rpi-default-providers but didn't
add it to the README and instead pointed out to rpi-default-providers to
have a level of indirection in case the providers change and to not have
duplicated information but I will add it to the README as well.

Do you have comments on the other patches in the series so I can address
all of them before re-spinning?

> --
> Andrei Gherzan
> 
> 

Best regards,
-- 
Javier Martinez Canillas
Open Source Group
Samsung Research America