linux-kernel - Re: [PATCH] clk: mediatek: clk-mt8195-vdo0: Set rate on vdo0_dp_intf0_dp

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Message-Id: <20220617001134.9AD0CC34114@smtp.kernel.org>
Date:   Thu, 16 Jun 2022 17:11:32 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, mturquette@...libre.com
Cc:     matthias.bgg@...il.com, wenst@...omium.org,
        miles.chen@...iatek.com, chun-jie.chen@...iatek.com,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        rex-bc.chen@...iatek.com
Subject: Re: [PATCH] clk: mediatek: clk-mt8195-vdo0: Set rate on vdo0_dp_intf0_dp_intf's parent

Quoting AngeloGioacchino Del Regno (2022-06-16 01:48:44)
> Il 16/06/22 04:44, Stephen Boyd ha scritto:
> > Quoting AngeloGioacchino Del Regno (2022-06-14 02:10:20)
> >> Add the CLK_SET_RATE_PARENT flag to the CLK_VDO0_DP_INTF0_DP_INTF
> >> clock: this is required to trigger clock source selection on
> >> CLK_TOP_EDP, while avoiding to manage the enablement of the former
> >> separately from the latter in the displayport driver.
> >>
> >> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> >> ---
> > 
> > Any Fixes tag?
> 
> Backporting is useless because there's no DisplayPort driver that supports MT8195
> in the previous kernel versions, so this clock (and whatever logic behind it) is
> unused.
> 
> Though, if you think that's going to be useful in any way, I can add one?
> 

It's always useful. A Fixes tag doesn't mean anything for backporting to
stable kernels.