linux-kernel - Re: [PATCH v3 1/4] drm/bridge: sil_sii8620: depend on INPUT instead of selecting it.

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Message-ID: <20190328000743.GB24753@innovation.ch>
Date:   Wed, 27 Mar 2019 17:07:43 -0700
From:   "Life is hard, and then you die" <ronald@...ovation.ch>
To:     Andrzej Hajda <a.hajda@...sung.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Henrik Rydberg <rydberg@...math.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Lukas Wunner <lukas@...ner.de>,
        Federico Lorenzi <federico@...velground.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Inki Dae <inki.dae@...sung.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH v3 1/4] drm/bridge: sil_sii8620: depend on INPUT instead
 of selecting it.


  Hi Andrzej,

On Wed, Mar 27, 2019 at 03:13:37PM +0100, Andrzej Hajda wrote:
> +cc: dri-devel
> 
> On 27.03.2019 02:48, Ronald Tschalär wrote:
> > commit d6abe6df706c66d803e6dd4fe98c1b6b7f125a56 (drm/bridge:
> > sil_sii8620: do not have a dependency of RC_CORE) added a dependency on
> > INPUT. However, this causes problems with other drivers, in particular
> > an input driver that depends on MFD_INTEL_LPSS_PCI (to be added in a
> > future commit):
> >
> >   drivers/clk/Kconfig:9:error: recursive dependency detected!
> >   drivers/clk/Kconfig:9:        symbol COMMON_CLK is selected by MFD_INTEL_LPSS
> >   drivers/mfd/Kconfig:566:      symbol MFD_INTEL_LPSS is selected by MFD_INTEL_LPSS_PCI
> >   drivers/mfd/Kconfig:580:      symbol MFD_INTEL_LPSS_PCI is implied by KEYBOARD_APPLESPI
> >   drivers/input/keyboard/Kconfig:73:    symbol KEYBOARD_APPLESPI depends on INPUT
> >   drivers/input/Kconfig:8:      symbol INPUT is selected by DRM_SIL_SII8620
> >   drivers/gpu/drm/bridge/Kconfig:83:    symbol DRM_SIL_SII8620 depends on DRM_BRIDGE
> >   drivers/gpu/drm/bridge/Kconfig:1:     symbol DRM_BRIDGE is selected by DRM_PL111
> >   drivers/gpu/drm/pl111/Kconfig:1:      symbol DRM_PL111 depends on COMMON_CLK
> >
> > According to the docs, select should only be used for non-visible
> > symbols. Furthermore almost all other references to INPUT throughout the
> > kernel config are depends, not selects. Hence this change.
> >
> > CC: Inki Dae <inki.dae@...sung.com>
> > CC: Andrzej Hajda <a.hajda@...sung.com>
> > Signed-off-by: Ronald Tschalär <ronald@...ovation.ch>
> 
> This is drm bridge driver, next time please cc it to dri-devel ML also.

Ok. Though as noted in the cover letter, the patch here is meant as a
placeholder till the real thing being discussed on dri-devel is
finalized. I was trying to avoid cross-posting too much, hence the
separate submission on dri-devel.

> Anyway this is not the solution we have agreed to.
> 
> Why have you abandoned the patch [1]? It needed just some minor
> polishing, as I wrote in response to this mail.
> 
> [1]:
> https://lore.kernel.org/lkml/20190124082423.23139-1-ronald@innovation.ch/T/#mf620df0b1583096a214d8e2e690387078583472f

It seems your mail client doesn't like me :-) I got neither of your
responses. Sorry, I should've checked the archives when I didn't hear
anything. In any case thank you for your review, and I will update
that patch and send out a new version shortly.


  Cheers,

  Ronald


> > ---
> >  drivers/gpu/drm/bridge/Kconfig | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> > index 2fee47b0d50b..eabedc83f25c 100644
> > --- a/drivers/gpu/drm/bridge/Kconfig
> > +++ b/drivers/gpu/drm/bridge/Kconfig
> > @@ -83,9 +83,9 @@ config DRM_PARADE_PS8622
> >  config DRM_SIL_SII8620
> >  	tristate "Silicon Image SII8620 HDMI/MHL bridge"
> >  	depends on OF
> > +	depends on INPUT
> >  	select DRM_KMS_HELPER
> >  	imply EXTCON
> > -	select INPUT
> >  	select RC_CORE
> >  	help
> >  	  Silicon Image SII8620 HDMI/MHL bridge chip driver.
> 
>