linux-kernel - Re: [v2] drm/panel: Fine tune Starry-ili9882t panel HFP and HBP

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Date:   Thu, 29 Jun 2023 17:41:46 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Cong Yang <yangcong5@...qin.corp-partner.google.com>
Cc:     sam@...nborg.org, neil.armstrong@...aro.org, daniel@...ll.ch,
        airlied@...il.com, hsinyi@...gle.com,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [v2] drm/panel: Fine tune Starry-ili9882t panel HFP and HBP

Hi,

On Tue, Jun 27, 2023 at 2:17 PM Doug Anderson <dianders@...gle.com> wrote:
>
> Hi,
>
> On Mon, Jun 26, 2023 at 10:01 PM Cong Yang
> <yangcong5@...qin.corp-partner.google.com> wrote:
> >
> > Because the setting of hproch is too small, there will be warning in

I realized that hproch should be hporch. I fixed when applying.


> > kernel log[1]. After fine tune the HFP and HBP, this warning can be
> > solved. The actual measurement frame rate is 60.1Hz.
> >
> > [1]: WARNING kernel:[drm] HFP + HBP less than d-phy, FPS will under 60Hz
>
> Thanks for including the warming. This looks like something that's
> only printed on Mediatek display controllers. Just out of curiosity:
> is that because Mediatek controllers have special requirements, or is
> this something generic and the Mediatek controller is the only one
> that warns about it?
>
>
> > Fixes: 8716a6473e6c ("drm/panel: Support for Starry-ili9882t TDDI
> > MIPI-DSI panel")
>
> Ideally the tool you have to send mail wouldn't wrap the Fixes line.
> Probably not worth resending just for this, but see if there's
> something you can do to fix this in the future.
>
> Since this is a tiny fix, I don't think we need to wait too long. I'll
> plan to land it on Thursday unless Neil wants to land it himself
> sooner.
>
> Reviewed-by: Douglas Anderson <dianders@...omium.org>

OK, landed. This is a weird time to land since this is a fix and the
fix has already made its way to Linus's tree but -rc1 isn't ready yet.
>From reading the flowchart in the committer guidelines:

https://drm.pages.freedesktop.org/maintainer-tools/committer-drm-misc.html

...this means that it lands in drm-misc-next-fixes, so I've pushed it there.

59bba51ec2a5 drm/panel: Fine tune Starry-ili9882t panel HFP and HBP

-Doug