[Openpvrsgx-devgroup] Building the 1.7.862890 branch for x86

[Julius Schwartzenberg]

On 28.05.24 15:57, H. Nikolaus Schaller wrote:
> Hm. To me it appeared that you are on the right one. But there are two branches:
> a) letux/pvrsrvkm-1.7.862890 - which is (currently) based on upstream v6.8-rc4
> b) pvrsrvkm-6.8-rc4 - which merges everything into a full branch, including the core driver and letux_defconfig

I was using a, but I'm struggling with how I could use b. Could it be 
that it misses glue needed for Cedarview? I guess something would still 
need to be ported. I enabled all PowerVR related options I found in 
`make menuconfig` but the compilation didn't seem to pass the driver code.


>> The CONFIG variable used by my branch is the one that Intel's developers chose (CONFIG_DRM_INTEL_CDV).
> 
> Ah, I see. Well, we have a scheme that tries to combine all architectures and therefor isn't focussed on Intel&Cedarview.

For now I continued again with my prior branch with the added Cedarview 
bits. It would be great to move things into a tree that combines all 
architectures, but I think the first step would be to get something to 
work with a newer kernel at all. (At least boot up and find /proc/pvr 
existing and some userspace libs interacting with it.)


>> Hopefully we could simply move everything to the latest DDK instead? :)
> 
> Well it may be possible but isn't simple either :)

I am thinking we might have some luck with reaching out to Imagination 
once we are at a stage where we'd just need the right userspace code 
from their end :)

After solving some more compilation issues, I'm now running into build 
errors that seem to be in Intel Cedarview specific parts:

> drivers/gpu/drm/pvrsgx/1.7.862890/drv/psb_gtt.h:56:30: error: field ‘hash’ has incomplete type
>    56 |         struct drm_open_hash hash;
>       |                              ^~~~
> drivers/gpu/drm/pvrsgx/1.7.862890/drv/psb_gtt.h:62:30: error: field ‘ht’ has incomplete type
>    62 |         struct drm_open_hash ht;
>       |                              ^~
> drivers/gpu/drm/pvrsgx/1.7.862890/drv/psb_gtt.h:64:30: error: field ‘item’ has incomplete type
>    64 |         struct drm_hash_item item;
>       |                              ^~~~
> drivers/gpu/drm/pvrsgx/1.7.862890/drv/psb_gtt.h:69:30: error: field ‘item’ has incomplete type
>    69 |         struct drm_hash_item item;
>       |                              ^~~~
> drivers/gpu/drm/pvrsgx/1.7.862890/drv/psb_drv.h:41:10: fatal error: ttm/ttm_object.h: Немає такого файла або каталогу
>    41 | #include "ttm/ttm_object.h"
>       |          ^~~~~~~~~~~~~~~~~~

I guess I need to look at how other drivers solved these issues.

Best regards,
Julius