linux-kernel - Re: [PATCH 0/2] pwm: mtk-disp: Fix backlight configuration at boot

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Date:   Wed, 8 Mar 2023 15:50:24 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     thierry.reding@...il.com, u.kleine-koenig@...gutronix.de,
        matthias.bgg@...il.com, weiqing.kong@...iatek.com,
        jitao.shi@...iatek.com, linux-pwm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com
Subject: Re: [PATCH 0/2] pwm: mtk-disp: Fix backlight configuration at boot

On Wed, Mar 08, 2023 at 12:46:07PM +0100, AngeloGioacchino Del Regno wrote:
> Il 23/02/23 15:16, AngeloGioacchino Del Regno ha scritto:
> > Il 23/01/23 17:06, AngeloGioacchino Del Regno ha scritto:
> > > Since the pwm-mtk-disp driver was fixed to get PWM_EN state from the
> > > right register, an old two-wrongs-make-one-right issue emerged: as a
> > > result, MT8192 Asurada Spherion got no backlight at boot unless a
> > > suspend/resume cycle was performed.
> > > Also, the backlight would sometimes not get updated with the requested
> > > value, requiring the user to change it back and forth until it worked.
> > > 
> > > This series fixes both of the aforementioned issues found on MT8192.
> > > 
> > > AngeloGioacchino Del Regno (2):
> > >    pwm: mtk-disp: Disable shadow registers before setting backlight
> > >      values
> > >    pwm: mtk-disp: Configure double buffering before reading in
> > >      .get_state()
> > > 
> > >   drivers/pwm/pwm-mtk-disp.c | 34 +++++++++++++++++++++++-----------
> > >   1 file changed, 23 insertions(+), 11 deletions(-)
> > > 
> > 
> > Gentle ping for this one: this is fixing backlight issues on multiple MediaTek
> > SoCs and was well tested.
> > 
> > Thanks,
> > Angelo
> 
> Since this series was sent more than one month ago, and since this fixes broken
> backlight on a number of Chromebooks with MT8183 and MT8192 SoCs, and seen the
> urgency of getting these fixes in, I'm adding Greg to the loop.

$ ./scripts/get_maintainer.pl drivers/pwm/pwm-mtk-disp.c
Thierry Reding <thierry.reding@...il.com> (maintainer:PWM SUBSYSTEM)
"Uwe Kleine-König" <u.kleine-koenig@...gutronix.de> (reviewer:PWM SUBSYSTEM)
Matthias Brugger <matthias.bgg@...il.com> (maintainer:ARM/Mediatek SoC support)
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com> (reviewer:ARM/Mediatek SoC support)
linux-pwm@...r.kernel.org (open list:PWM SUBSYSTEM)
linux-kernel@...r.kernel.org (open list:ARM/Mediatek SoC support)
linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Mediatek SoC support)
linux-mediatek@...ts.infradead.org (moderated list:ARM/Mediatek SoC support)

I don't see my name in there, did I become the PWM maintainer somehow?

What's wrong with Thierry taking this like normal?

thanks,

greg k-h