On Fri, Jul 10, 2020 at 11:45:03AM +0300, Andy Shevchenko wrote:
On Fri, Jul 10, 2020 at 01:45:44AM +0300, Serge Semin wrote:
There are DMA devices (like ours version of Synopsys DW DMAC) which have
DMA capabilities non-uniformly redistributed between the device channels.
In order to provide a way of exposing the channel-specific parameters to
the DMA engine consumers, we introduce a new DMA-device callback. In case
if provided it gets called from the dma_get_slave_caps() method and is
able to override the generic DMA-device capabilities.
In light of recent developments consider not to add 'slave' and a such words to the kernel.
As long as the 'slave' word is used in the name of the dma_slave_caps
structure and in the rest of the DMA-engine subsystem, it will be ambiguous
to use some else terminology. If renaming needs to be done, then it should be
done synchronously for the whole subsystem.
-Sergey
--
With Best Regards,
Andy Shevchenko