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From:   Alexey Brodkin <Alexey.Brodkin@synopsys.com>
To:     Greg KH <gregkh@linuxfoundation.org>
CC:     "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>,
        "linux-snps-arc@lists.infradead.org" 
        <linux-snps-arc@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>,
        Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Subject: RE: [PATCH] DRM: ARC: PGU: interlaced mode not supported
Thread-Topic: [PATCH] DRM: ARC: PGU: interlaced mode not supported
Thread-Index: AQHV96bp/V5nm7FKPEO5H8ws3IVb16hDYMAAgAEHV3A=
Date:   Thu, 12 Mar 2020 05:07:43 +0000
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References: <20200311131310.20446-1-Eugeniy.Paltsev@synopsys.com>
 <20200311132152.GA3902788@kroah.com>
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Hi Greg,

> -----Original Message-----
> From: Greg KH <gregkh@linuxfoundation.org>
> Sent: Wednesday, March 11, 2020 8:22 PM
> To: Eugeniy Paltsev <paltsev@synopsys.com>
> Cc: dri-devel@lists.freedesktop.org; Alexey Brodkin <abrodkin@synopsys.co=
m>; linux-snps-
> arc@lists.infradead.org; linux-kernel@vger.kernel.org; David Airlie <airl=
ied@linux.ie>; Daniel Vetter
> <daniel@ffwll.ch>; stable@vger.kernel.org
> Subject: Re: [PATCH] DRM: ARC: PGU: interlaced mode not supported
>=20
> On Wed, Mar 11, 2020 at 04:13:10PM +0300, Eugeniy Paltsev wrote:
> > Filter out interlaced modes as they are not supported by ARC PGU
> > hardware.
> >
> > Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
> > ---
> >  drivers/gpu/drm/arc/arcpgu_crtc.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/arc/arcpgu_crtc.c b/drivers/gpu/drm/arc/ar=
cpgu_crtc.c
> > index 8ae1e1f97a73..c854066d4c75 100644
> > --- a/drivers/gpu/drm/arc/arcpgu_crtc.c
> > +++ b/drivers/gpu/drm/arc/arcpgu_crtc.c
> > @@ -67,6 +67,9 @@ static enum drm_mode_status arc_pgu_crtc_mode_valid(s=
truct drm_crtc *crtc,
> >  	long rate, clk_rate =3D mode->clock * 1000;
> >  	long diff =3D clk_rate / 200; /* +-0.5% allowed by HDMI spec */
> >
> > +	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
> > +		return MODE_NO_INTERLACE;
> > +
> >  	rate =3D clk_round_rate(arcpgu->clk, clk_rate);
> >  	if ((max(rate, clk_rate) - min(rate, clk_rate) < diff) && (rate > 0))
> >  		return MODE_OK;
> > --
> > 2.21.1
> >
>=20
> <formletter>
>=20
> This is not the correct way to submit patches for inclusion in the
> stable kernel tree.  Please read:
>     https://urldefense.proofpoint.com/v2/url?u=3Dhttps-
> 3A__www.kernel.org_doc_html_latest_process_stable-2Dkernel-
> 2Drules.html&d=3DDwIBAg&c=3DDPL6_X_6JkXFx7AXWqB0tg&r=3DlqdeeSSEes0GFDDl65=
6eViXO7breS55ytWkhpk5R81I&m=3DoXPD1Sz
> FBs-0-4u24Ah1rK1Y65Fma8tJZix0Jih-yqY&s=3DWTVW1dC7E2oD0muPxtNd9KAHzwIZwEU9=
jGuCHWx1iQk&e=3D
> for how to do this properly.
>=20
> </formletter>

Thanks for the comment. I'll add "Cc: stable@vger.kernel.org" tag to the
patch on committing it to my maintainer tree so one the patch makes its way
up to the Linus' tree you'll get notified as usual.

-Alexey