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From:   Anson Huang <anson.huang@nxp.com>
To:     Anson Huang <anson.huang@nxp.com>,
        "shawnguo@kernel.org" <shawnguo@kernel.org>,
        "s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
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        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     dl-linux-imx <linux-imx@nxp.com>
Subject: RE: [PATCH 1/2] firmware: imx: make sure MU irq can wake up system
 from suspend mode
Thread-Topic: [PATCH 1/2] firmware: imx: make sure MU irq can wake up system
 from suspend mode
Thread-Index: AQHWGcUyRhHY8Y+vZ0uZHvfqU0lQUai88iwg
Date:   Thu, 28 May 2020 01:54:40 +0000
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Gentle ping...


> Subject: [PATCH 1/2] firmware: imx: make sure MU irq can wake up system
> from suspend mode
>=20
> IRQF_NO_SUSPEND flag is set for MU IRQ of IPC work, but with this flag se=
t,
> IRQD_WAKEUP_ARMED flag will NOT be set during
> suspend_device_irq() phase, then when MU IRQ arrives, it will NOT wake up
> system from suspend.
>=20
> To fix this issue, pm_system_wakeup() is called in general MU IRQ handler=
 to
> make sure system can be waked up when MU IRQ arrives.
>=20
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> ---
>  drivers/firmware/imx/imx-scu-irq.c | 2 ++
>  1 file changed, 2 insertions(+)
>=20
> diff --git a/drivers/firmware/imx/imx-scu-irq.c
> b/drivers/firmware/imx/imx-scu-irq.c
> index db655e8..d9dcc20 100644
> --- a/drivers/firmware/imx/imx-scu-irq.c
> +++ b/drivers/firmware/imx/imx-scu-irq.c
> @@ -10,6 +10,7 @@
>  #include <linux/firmware/imx/ipc.h>
>  #include <linux/firmware/imx/sci.h>
>  #include <linux/mailbox_client.h>
> +#include <linux/suspend.h>
>=20
>  #define IMX_SC_IRQ_FUNC_ENABLE	1
>  #define IMX_SC_IRQ_FUNC_STATUS	2
> @@ -91,6 +92,7 @@ static void imx_scu_irq_work_handler(struct work_struct
> *work)
>  		if (!irq_status)
>  			continue;
>=20
> +		pm_system_wakeup();
>  		imx_scu_irq_notifier_call_chain(irq_status, &i);
>  	}
>  }
> --
> 2.7.4