Satya Rama Aditya Pinapala aecc86dfb2 disp: msm: dsi: add pre and post DSI command transfer controller APIs ...

To transfer a command on the DSI lanes, the following programming needs
to happen prior and post a command transfer:
- Vote/Unvote for clocks
- Enable/Disable command engine
- Mask/Unmask overflow and underflow errors.
These operations are done from the display context currently. This can
lead to issues during an ASYNC command wait, where in we queue the
dma_wait_for_done rather than wait in the same display thread.

The following change adds new DSI controller API that does the above
programming from the controller context. This way, post command transfer
operations can only happen once command is successfully transferred and
dma_wait_for_done completes.

Change-Id: I61db0d8a2656dc6e0e56864dbef01283b813d7c6
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>

2021-05-27 16:42:04 -07:00

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