tree a89a77a30a7d5e734cb9fb0328ee4dfde40fa6b1
parent be3034d9f9f3ea28588932d10bba6d06b71489a7
author Serge Semin <Sergey.Semin@baikalelectronics.ru> 1600600996 +0300
committer Mark Brown <broonie@kernel.org> 1601393829 +0100
gpgsig -----BEGIN PGP SIGNATURE-----
 
 iQFHBAABCgAxFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl9zVKUTHGJyb29uaWVA
 a2VybmVsLm9yZwAKCRAk1otyXVSH0PyCB/9ztwVn13oTLw6RjI7Z8e9OaNm6XEnV
 1TYkon+W881a+FRyWnx3jdTJjuaZL779QTNYSyJt/zLI/nCAr9C5VttiOJBhvHeJ
 NM1rOW+OsfrDD0aq60n4AaDaVbPbFCciJ1nMgIxTzVl9YWgH9hDlzTrYGIp0o+Xk
 0ZUPMEMHkHp3m8EMUIbZBTIhwduKwwRxkdY5AI9sjiT2YJWtScVUyJ/uPI7sNRqG
 GZMm6ffwpVboVsdEt77XGv3oUoakPxEVt50iALGntF79A8165H313qZ5/u87YI/O
 pHLD+nzzf7nr5RVi6fd2xQs/+KYeCVD9c5UuylbEGa9oMPkNG10BuuTs
 =fYCZ
 -----END PGP SIGNATURE-----

spi: dw-dma: Move DMA transfers submission to the channels prep methods

Indeed we can freely move the dmaengine_submit() method invocation and the
Tx and Rx busy flag setting into the DMA Tx/Rx prepare methods. Since the
Tx/Rx preparation method is now mainly used for the DMA transfers
submission, here we suggest to rename it to have the _submit_{r,t}x suffix
instead.

By having this alteration applied first we implement another code
preparation before adding the one-by-one DMA SG entries transmission,
second we now have the dma_async_tx_descriptor descriptor used locally
only in the new DMA transfers submission methods (this will be cleaned up
a bit later), third we make the generic transfer method more readable,
where now the functionality of submission, execution and wait procedures
is transparently split up instead of having a preparation, intermixed
submission/execution and wait procedures.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Link: https://lore.kernel.org/r/20200920112322.24585-6-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>