Hello All,
I am seeking recommendations for DRM compatible methods of updating the HW other than frame commit path. When exiting idle/runtime_suspend, the driver votes for a bunch of resources including power/clk/bandwidth as a part of first commit handling. This usually adds a few millisecond delay before processing the frame. The requirement is to find possible ways to reduce this delay by providing an early intimation to the framework to "prepare" the HW by voting for the resources and keep the HW ready to process an imminent frame commit. Especially in performance oriented Automotive world, these delays are very time critical and we are working on ways to mitigate them.
DRM framework converges all the parameters affecting the HW in terms of DRM properties in a single COMMIT call. To address the above issue, we need a parallel channel which should allow the framework to make necessary changes to the HW without violating the master access privileges.
Before resorting to custom downstream ways, I want to check with the community for folks who might have encountered and resolved such issues.
Thanks and Regards,
Jeykumar S
Qualcomm Inc.