From: Daniel Baluta <daniel.bal...@nxp.com>
We need this in order to implement the communication protocol
between Linux kernel SOF IPC layer and DSP firmware found on i.MX8 boards.
First patch is just a bugfix and can be merged as it is.
The second patch is just a RFC to open the discussion on how to use the i.MX
mailbox API in order to communicate with the DSP. I want to know if this
scenario can be supported by the mailbox abstraction of MU or should I
go back and directly access MU registers.
We need to have two MU channels:
- channel #0, Host sends notification (via GIR) to DSP and gets a reply
(via GIP)
- channel #1, DSP sends message to Host (via GIR) and gets a reply (via
GIP).
The details of the protocol can be found in patch 2.
Daniel Baluta (2):
mailbox: imx: Clear GIEn bit at shutdown
imx: mailbox: Introduce TX doorbell with ACK
drivers/mailbox/imx-mailbox.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--
2.17.1
