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Subject[PATCH V6 0/4] mailbox/firmware: imx: support SCU channel type
From: Peng Fan <>

Add Oleksij's R-b tag
Patch 3/4, per
should use %zu for printk sizeof

Move imx_mu_dcfg below imx_mu_priv
Add init hooks to imx_mu_dcfg
drop __packed __aligned
Add more debug msg
code style cleanup

Pack MU chans init to separate function
Add separate function for SCU chans init and xlate
Add santity check to msg hdr.size
Limit SCU MU chans to 6, TX0/RX0/RXDB[0-3]

Rebase to Shawn's for-next
Include fsl,imx8-mu-scu compatible
Per Oleksij's comments, introduce generic tx/rx and added scu mu type
Check fsl,imx8-mu-scu in firmware driver for fast_ipc

Drop patch 1/3 which added fsl,scu property
Force to use scu channel type when machine has node compatible "fsl,imx-scu"
Force imx-scu to use fast_ipc

I not found a generic method to make SCFW message generic enough, SCFW
message is not fixed length including TX and RX. And it use TR0/RR0

Sorry to bind the mailbox/firmware patch together. This is make it
to understand what changed to support using 1 TX and 1 RX channel
for SCFW message.

Per i.MX8QXP Reference mannual, there are several message using
examples. One of them is:
Passing short messages: Transmit register(s) can be used to pass
short messages from one to four words in length. For example,
when a four-word message is desired, only one of the registers
needs to have its corresponding interrupt enable bit set at the
receiver side.

This patchset is to using this for SCFW message to replace four TX
and four RX method.

Peng Fan (4):
dt-bindings: mailbox: imx-mu: add SCU MU support
mailbox: imx: restructure code to make easy for new MU
mailbox: imx: add SCU MU support
firmware: imx-scu: Support one TX and one RX

.../devicetree/bindings/mailbox/fsl,mu.txt | 2 +
drivers/firmware/imx/imx-scu.c | 54 ++++-
drivers/mailbox/imx-mailbox.c | 267 +++++++++++++++++----
3 files changed, 260 insertions(+), 63 deletions(-)

base-commit: 770fbb32d34e5d6298cc2be590c9d2fd6069aa17

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