linux-kernel - Re: [PATCH 9/9] staging: media: atomisp: add PMIC

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Message-ID: <20200530072533.66591af2@coco.lan>
Date:   Sat, 30 May 2020 07:25:33 +0200
From:   Mauro Carvalho Chehab <mchehab@...nel.org>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH 9/9] staging: media: atomisp: add PMIC_OPREGION
 dependency

Em Fri, 29 May 2020 20:11:29 -0700
Nathan Chancellor <natechancellor@...il.com> escreveu:

> On Fri, May 29, 2020 at 10:00:31PM +0200, Arnd Bergmann wrote:
> > Without that driver, there is a link failure in
> > 
> > ERROR: modpost: "intel_soc_pmic_exec_mipi_pmic_seq_element"
> > [drivers/staging/media/atomisp/pci/atomisp_gmin_platform.ko] undefined!
> > 
> > Add an explicit Kconfig dependency.
> > 
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>  
> 
> It'd be interesting to know if this is strictly required for the driver
> to work properly. 

It is. Without OpRegion, the driver can't power on the camera sensors.

> The call to intel_soc_pmic_exec_mipi_pmic_seq_element
> has some error handling after it, maybe that should just be surrounded
> by an #ifdef or IS_ENABLED for PMIC_OPREGION, like some other drivers
> do.
> 
> Regardless of that:
> 
> Reviewed-by: Nathan Chancellor <natechancellor@...il.com>
> 
> > ---
> >  drivers/staging/media/atomisp/Kconfig | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/staging/media/atomisp/Kconfig b/drivers/staging/media/atomisp/Kconfig
> > index c4f3049b0706..e86311c14329 100644
> > --- a/drivers/staging/media/atomisp/Kconfig
> > +++ b/drivers/staging/media/atomisp/Kconfig
> > @@ -11,6 +11,7 @@ menuconfig INTEL_ATOMISP
> >  config VIDEO_ATOMISP
> >  	tristate "Intel Atom Image Signal Processor Driver"
> >  	depends on VIDEO_V4L2 && INTEL_ATOMISP
> > +	depends on PMIC_OPREGION
> >  	select IOSF_MBI
> >  	select VIDEOBUF_VMALLOC
> >  	---help---
> > -- 
> > 2.26.2
> >   



Thanks,
Mauro