Video acceleration on Allwinner A83T

[Ryzer]

I have been experimenting with trying to get video acceleration working on the A83T. I can see from /proc/device-tree/soc/... that there is already a video-engine node within the current A83T device tree. It appears to be applied as one of the megous patches ARM-dts-sun8i-a83t-Add-cedrus-video-codec-support-to-A83T-untes.patch. Admittedly this is noted as being untested. In my initially created build via the build framework, Cedrus was not present at all among the list of loaded modules. I addressed this by creating an entry in the Cedrus compatibility table for the sun8i-a83t-video engine

 

drv-sun8i-a83t-cedrus-add-variant.patch

 

It now appears to load but complains about being unable to allocated an SRAM:

 

[   10.046406] cedrus 1c0e000.video-codec: Failed to claim SRAM
[   10.046490] cedrus 1c0e000.video-codec: Failed to probe hardware
[   10.091215] cedrus 1c0e000.video-codec: Failed to claim SRAM
[   10.091339] cedrus 1c0e000.video-codec: Failed to probe hardware
[   10.419296] cedrus 1c0e000.video-codec: Failed to claim SRAM
[   10.419597] cedrus 1c0e000.video-codec: Failed to probe hardware
[   20.193058] cedrus 1c0e000.video-codec: Failed to claim SRAM
[   20.193114] cedrus 1c0e000.video-codec: Failed to probe hardware
[   20.193322] platform 1c0e000.video-codec: deferred probe pending: (reason unknown)

 

Using both sun8i-a23-a33.dtsi and sun8i-h3.dtsi as points of reference, I attempted to make an SRAM allocation under the system controller but this still appears to fail with the same failure messages. I have double checked in the user manual and VE memory should definitely exist at 0x01D0 0000.

 

arm-dts-sun8i-a83t-add-ve-node.patch

 

I would be grateful for any pointers.

 

Thanks 

 

Ryzer