[Mesa-dev] Beignet Mesa EGL extension

Emil Velikov emil.l.velikov at gmail.com
Sun Jun 22 15:58:02 PDT 2014

On 22/06/14 23:22, Kenneth Graunke wrote:
> On Sunday, June 22, 2014 07:37:20 PM Emil Velikov wrote:
>> On 19/06/14 12:25, Steven Newbury wrote:
>>> I was looking at getting Beignet compiling against current mesa working
>>> again a few weeks ago. Really there needs to be some coordination with
>>> the Mesa devs to provide a suitable API since what was being used has
>>> been since removed. To that end; I've cc'd mesa-dev, hopefully there can
>>> be progress made.
>>> As to my own efforts; unfortunately, after making some progress, I
>>> accidentally lost my patches(!), but since I spent a while reading the
>>> code, I'm sure the below commit which has attempted to at least get it
>>> working with 10.1 is only partially right. See inline.  
>>>> commit c2d2853c55d7ab12e422301d1c359b4f736b87d8
>>>> Author: Abrahm Scully <abrahm.scully at gmail.com>
>>>> Date:   Wed Jun 18 22:28:08 2014 -0400
>>>>     Fix build with mesa 10.1.
>>>>     Mesa renamed some constants and a directory.
>>>>     Signed-off-by: Abrahm Scully <abrahm.scully at gmail.com>
>>>>     Reviewed-by: Zhigang Gong <zhigang.gong at linux.intel.com>
>>>> diff --git a/CMake/FindMesaSrc.cmake b/CMake/FindMesaSrc.cmake
>>>> index c1d4fc6..978cb4e 100644
>>>> --- a/CMake/FindMesaSrc.cmake
>>>> +++ b/CMake/FindMesaSrc.cmake
>>>> @@ -18,7 +18,7 @@ SET(MESA_SOURCE_INCLUDES ${MESA_SOURCE_PREFIX}/src/mesa
>>>>                           ${MESA_SOURCE_PREFIX}/include
>>>>                           ${MESA_SOURCE_PREFIX}/src/mapi
> ${MESA_SOURCE_PREFIX}/src/mesa/drivers/dri/i965/
>>>> -                         
> ${MESA_SOURCE_PREFIX}/src/mesa/drivers/dri/intel/
>>>> +                         
> ${MESA_SOURCE_PREFIX}/src/mesa/drivers/dri/i915/
>>> The i915 is the "other" intel driver, it's *wrong* to include the
>>> headers even though they happen to provide the missing definitions which
>>> were in the headers present in the common "intel" directory.  If they're
>>> still valid for i965 it would be better to define them in the beignet
>>> source until upsteam Mesa provides an API for beignet to use.
>> Assuming that by "other intel driver" you mean "the driver not
>> written/supported by Intel", I believe that you're in a mistake. The i915 is
>> not the same as i915g. The former is the original and supported classic DRI
>> driver while the latter is a gallium based one, written by Stephane 
> Marchesin
>> and resides at src/gallium/drivers/i915.
>> Hope this clears things a bit.
>> Emil
> Well, there's that, but Steven is right: Beignet is only for Gen7+ hardware, 
> which is entirely i965.  Including stuff out of the i915 driver (for Gen2-3 
> hardware) doesn't make much sense.
Seems like the wording got me there :\

Thanks for the reminder Ken.

> --Ken

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