linux-kernel - Re: [PATCH v3 16/24] drm/sun4i: Enable DW HDMI PHY clock

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Message-ID: <CAGb2v64UY9t9oKPQiEJkFsTyxJOJTG9dvJMNJYoHy7CKQ4Ap2Q@mail.gmail.com>
Date:   Sat, 30 Jun 2018 09:11:20 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Jernej Škrabec <jernej.skrabec@...l.net>
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Rob Herring <robh+dt@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Gustavo Padovan <gustavo@...ovan.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [PATCH v3 16/24] drm/sun4i: Enable DW HDMI PHY clock

On Sat, Jun 30, 2018 at 3:19 AM, Jernej Škrabec <jernej.skrabec@...l.net> wrote:
> Dne četrtek, 28. junij 2018 ob 04:22:36 CEST je Chen-Yu Tsai napisal(a):
>> On Mon, Jun 25, 2018 at 8:02 PM, Jernej Skrabec <jernej.skrabec@...l.net>
> wrote:
>> > Current DW HDMI PHY code never prepares and enables PHY clock after it is
>> > created. It's just used as it is. This may work in some cases, but it's
>> > clearly wrong. Fix it by adding proper calls to enable/disable PHY
>> > clock.
>> >
>> > Fixes: 4f86e81748fe ("drm/sun4i: Add support for H3 HDMI PHY variant")
>> >
>> > Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
>>
>> So why does it work on the H3? Because there's only one PLL that the whole
>> display pipeline uses?
>>
>> We should probably tag this for stable. So,
>>
>> Cc: <stable@...r.kernel.org>
>> Reviewed-by: Chen-Yu Tsai <wens@...e.org>
>
> Same question as before, how this should be handled? Can I send separate patch
> with same content to stable ML only?

Yes, including the hash of the commit which is already in Linus' tree. So
you have to send it after the next -rc1.

ChenYu