Re: [PATCH V2 2/2] mailbox: imx: support RST channel

From: Liu Ying
Date: Wed Aug 24 2022 - 05:37:48 EST


Hi,

On Wed, 2022-06-15 at 21:00 +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
>
> i.MX generic MU supports MU-A/B reset feature.
>
> When stop/start remotecore, MU is not reset. So when Linux stop
> remotecore, the MU-B side BCR may contain valid configuration,
> because MU-B is not reset. So when linux start Mcore
> again and notify Mcore, Mcore is not ready to handle MU interrupt
> and cause issues. So need reset MU when stop Mcore.
>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>

It looks like this patch causes i.MX8qxp MEK boot failure with v6.0-
rc1. After reverting commit 82ab513baed5895c8b0e991557a12fd38d5f25f0,
it boots ok.

There are a lot imx_mu and imx-scu error logs:

----------------------------8<------------------------------------
[ 1.166567] imx-scu system-controller: RPC send msg timeout
[ 1.171843] imx_scu_soc_id: get soc info failed, ret -110
[ 1.177221] imx-scu system-controller: failed to initialize SoC
info: -22
[ 1.184019] imx-scu system-controller: NXP i.MX SCU Initialized
[ 1.230605] imx-scu system-controller: RPC send msg timeout
[ 1.270559] imx-scu system-controller: RPC send msg timeout
[ 1.310561] imx-scu system-controller: RPC send msg timeout
[ 1.350560] imx-scu system-controller: RPC send msg timeout
[ 1.390560] imx-scu system-controller: RPC send msg timeout
[ 1.430561] imx-scu system-controller: RPC send msg timeout
[ 1.470559] imx-scu system-controller: RPC send msg timeout
[ 1.510559] imx-scu system-controller: RPC send msg timeout
[ 1.550559] imx-scu system-controller: RPC send msg timeout
[ 1.590559] imx-scu system-controller: RPC send msg timeout
[ 1.630561] imx-scu system-controller: RPC send msg timeout
[ 1.670558] imx-scu system-controller: RPC send msg timeout
[ 1.710559] imx-scu system-controller: RPC send msg timeout
[ 1.750558] imx-scu system-controller: RPC send msg timeout
[ 1.790559] imx-scu system-controller: RPC send msg timeout
[ 1.830562] imx-scu system-controller: RPC send msg timeout
[ 1.870559] imx-scu system-controller: RPC send msg timeout
[ 1.910559] imx-scu system-controller: RPC send msg timeout
[ 1.950561] imx-scu system-controller: RPC send msg timeout
[ 1.990592] imx-scu system-controller: RPC send msg timeout
[ 1.995838] imx_mu 5d1c0000.mailbox: Try increasing
MBOX_TX_QUEUE_LEN
[ 2.002262] imx-scu system-controller: RPC send msg failed: -105
[ 2.008260] imx_mu 5d1c0000.mailbox: Try increasing
MBOX_TX_QUEUE_LEN
[ 2.014682] imx-scu system-controller: RPC send msg failed: -105
[ 2.020681] imx_mu 5d1c0000.mailbox: Try increasing
MBOX_TX_QUEUE_LEN
[ 2.027103] imx-scu system-controller: RPC send msg failed: -105
[ 2.033105] imx_mu 5d1c0000.mailbox: Try increasing
MBOX_TX_QUEUE_LEN
[ 2.039526] imx-scu system-controller: RPC send msg failed: -105
[ 2.045526] imx_mu 5d1c0000.mailbox: Try increasing
MBOX_TX_QUEUE_LEN
[ 2.051949] imx-scu system-controller: RPC send msg failed: -105
----------------------------8<------------------------------------

Regards,
Liu Ying