linux-kernel - Re: [PATCH v9 3/5] drm/msm/dp: add support for DP PLL driver

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Message-ID: <75acac5a-b4a5-9c5a-4404-fb936d738e46@infradead.org>
Date:   Fri, 7 Aug 2020 13:28:38 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Stephen Boyd <swboyd@...omium.org>, Rob Clark <robdclark@...il.com>
Cc:     Tanmay Shah <tanmay@...eaurora.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Sean Paul <seanpaul@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>, aravindh@...eaurora.org,
        Abhinav Kumar <abhinavk@...eaurora.org>, khsieh@...eaurora.org,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        Vara Reddy <varar@...eaurora.org>
Subject: Re: [PATCH v9 3/5] drm/msm/dp: add support for DP PLL driver

On 8/7/20 1:24 PM, Stephen Boyd wrote:
> Quoting Rob Clark (2020-08-07 08:51:48)
>> On Fri, Aug 7, 2020 at 8:27 AM Randy Dunlap <rdunlap@...radead.org> wrote:
>>>
>>> On 8/7/20 12:17 AM, Tanmay Shah wrote:
>>>> diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
>>>> index ea3c4d094d09..cc1392b29022 100644
>>>> --- a/drivers/gpu/drm/msm/Kconfig
>>>> +++ b/drivers/gpu/drm/msm/Kconfig
>>>> @@ -60,6 +60,7 @@ config DRM_MSM_HDMI_HDCP
>>>>  config DRM_MSM_DP
>>>>       bool "Enable DP support in MSM DRM driver"
>>>>       depends on DRM_MSM
>>>> +     default y
>>>>       help
>>>>         Compile in support for DP driver in msm drm driver. DP external
>>>>         display support is enabled through this config option. It can
>>>
>>> Hi,
>>>
>>> You need a very strong justification to make an optional part of a driver
>>> to be "default y".
>>
>> My opinion is that if the driver is built, everything should be built.
>> This is what makes sense for distro's.  It is only the embedded case
>> where you want to trim down unneeded features where you might want to
>> disable some parts.  So 'default y' makes sense to me.

We don't set defaults for distro convenience.

> 
> Maybe use 'default DRM_MSM' so that it doesn't trigger the 'default y'
> filters people have?

Most people can figure that one out.  ;)
I don't have any automated filters.

-- 
~Randy