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The mailbox core uses jiffy based timer to handle polling for the
transmit completion. If the client/protocol have/support notification
of the last packet transmit completion via ACK packet, then we tick the
Tx state machine immediately in the callback. However if the client
doesn't support that mechanism we might end-up waiting for atleast a
jiffy even though the remote is ready to receive the next request.
This patch switches the timer used for that polling from jiffy-based
to hrtimer-based so that we can support polling at much higher time
resolution.
Reported-and-suggested-by: Juri Lelli <[email protected]>
Signed-off-by: Sudeep Holla <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>
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The mailbox controller's channel ops ought to be read-only. Update
all the mailbox drivers to make their mbox_chan_ops const as well.
Signed-off-by: Andrew Bresticker <[email protected]>
Cc: Ashwin Chaugule <[email protected]>
Cc: Ley Foon Tan <[email protected]>
Acked-by: Suman Anna <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>
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Introduce common framework for client/protocol drivers and
controller drivers of Inter-Processor-Communication (IPC).
Client driver developers should have a look at
include/linux/mailbox_client.h to understand the part of
the API exposed to client drivers.
Similarly controller driver developers should have a look
at include/linux/mailbox_controller.h
Reviewed-by: Mark Brown <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>
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