linux-kernel - Re: [RFC 0/2] Add workaround for core wake-up on IPI for i.MX8MQ

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Date:   Mon, 11 Nov 2019 07:54:42 +0000
From:   Abel Vesa <abel.vesa@....com>
To:     Martin Kepplinger <martink@...teo.de>
CC:     Leonard Crestez <leonard.crestez@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Jacky Bai <ping.bai@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Carlo Caione <ccaione@...libre.com>,
        dl-linux-imx <linux-imx@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 0/2] Add workaround for core wake-up on IPI for i.MX8MQ

On 19-11-08 15:17:12, Martin Kepplinger wrote:
> On 08.11.19 12:50, Abel Vesa wrote:
> > On 19-11-08 12:21:21, Martin Kepplinger wrote:
> > 
> >> Hi Leonard, hi Abel,
> >>
> >> Thanks for having a look! To sum up this problem and not to get confused:
> >>
> >> We have the workaround that changes irq-imx-gpcv2 from this very email
> >> thread, to be used with mainline ATF. when applying Abel's recent diff,
> >> Linux 5.4 boots but I still don't have a cpuidle driver.
> >>
> >> When I enable CONFIG_ARM_PSCI_CPUIDLE, the kernel hangs during boot
> >> (after probing mmc, but that doesn't tell much)
> >>
> >> What do I miss?
> >>
> > 
> > OK, please fetch the branches called "imx8mq-err11171" from both following github repos and give it a try:
> > 
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fabelvesa%2Flinux.git&amp;data=02%7C01%7Cabel.vesa%40nxp.com%7C663191bd4af6489d08f808d764565ca2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637088194388256459&amp;sdata=HydsZLtPExbRx7qDByTI%2FCYFGYS67fU9FDsLmHy7x7o%3D&amp;reserved=0
> > 
> > and
> > 
> > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fabelvesa%2Farm-trusted-firmware.git&amp;data=02%7C01%7Cabel.vesa%40nxp.com%7C663191bd4af6489d08f808d764565ca2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637088194388256459&amp;sdata=zkCpOrEvoiNGj7BBuVuHzTWmBFaZk0SCuePOKZA3T2o%3D&amp;reserved=0
> > 
> > I just tested it. Works with defconfig.
> > 
> 
> thanks for the reminder. I was missing IMX_SCU_PD appearently.
> 

There is no SCU on 8MQ so I don't think that was the problem.

Maybe something else.

> thanks for the effort, I hope this is useful for others too.

I'll try to keep those up-to-date.

> 
>                          martin
>