Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH v3 1/4] drm/bridge: sil_sii8620: depend on INPUT instead
 of selecting it.
To:     =?UTF-8?Q?Ronald_Tschal=c3=a4r?= <ronald@innovation.ch>,
        Dmitry Torokhov <dmitry.torokhov@gmail.com>,
        Henrik Rydberg <rydberg@bitmath.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>
Cc:     Lukas Wunner <lukas@wunner.de>,
        Federico Lorenzi <federico@travelground.com>,
        linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
        Inki Dae <inki.dae@samsung.com>,
        "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>
From:   Andrzej Hajda <a.hajda@samsung.com>
Message-ID: <9fd8af5b-20ed-5dca-7d5c-98f2926b9b0c@samsung.com>
Date:   Wed, 27 Mar 2019 15:13:37 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
        Thunderbird/60.5.1
MIME-Version: 1.0
In-Reply-To: <20190327014807.7472-2-ronald@innovation.ch>
Content-Transfer-Encoding: 8bit
Content-Language: en-US
Content-Type: text/plain; charset="utf-8"
CMS-TYPE: 201P
References: <20190327014807.7472-1-ronald@innovation.ch>
        <CGME20190327014824epcas2p1f79a41c58f76150f7324169805f506f0@epcas2p1.samsung.com>
        <20190327014807.7472-2-ronald@innovation.ch>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

+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@samsung.com>
> CC: Andrzej Hajda <a.hajda@samsung.com>
> Signed-off-by: Ronald Tschalär <ronald@innovation.ch>


This is drm bridge driver, next time please cc it to dri-devel ML also.

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


Regards

Andrzej


> ---
>  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.