linux-kernel - RE: [PATCH 5.15 100/262] drm/amd/display: move FPU associated DSC code to DML folder

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Date:   Mon, 7 Mar 2022 19:35:58 +0000
From:   "Deucher, Alexander" <Alexander.Deucher@....com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "Wu, Hersen" <hersenxs.wu@....com>,
        Anson Jacob <Anson.Jacob@....com>,
        "Wentland, Harry" <Harry.Wentland@....com>,
        "Siqueira, Rodrigo" <Rodrigo.Siqueira@....com>,
        "Gutierrez, Agustin" <Agustin.Gutierrez@....com>,
        "Wheeler, Daniel" <Daniel.Wheeler@....com>,
        "Zhuo, Qingqing (Lillian)" <Qingqing.Zhuo@....com>,
        Sasha Levin <sashal@...nel.org>
Subject: RE: [PATCH 5.15 100/262] drm/amd/display: move FPU associated DSC
 code to DML folder

[Public]

> -----Original Message-----
> From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Sent: Monday, March 7, 2022 12:23 PM
> To: Deucher, Alexander <Alexander.Deucher@....com>
> Cc: linux-kernel@...r.kernel.org; stable@...r.kernel.org; Koenig, Christian
> <Christian.Koenig@....com>; Wu, Hersen <hersenxs.wu@....com>;
> Anson Jacob <Anson.Jacob@....com>; Wentland, Harry
> <Harry.Wentland@....com>; Siqueira, Rodrigo
> <Rodrigo.Siqueira@....com>; Gutierrez, Agustin
> <Agustin.Gutierrez@....com>; Wheeler, Daniel
> <Daniel.Wheeler@....com>; Zhuo, Qingqing (Lillian)
> <Qingqing.Zhuo@....com>; Sasha Levin <sashal@...nel.org>
> Subject: Re: [PATCH 5.15 100/262] drm/amd/display: move FPU associated
> DSC code to DML folder
> 
> On Mon, Mar 07, 2022 at 05:19:20PM +0000, Deucher, Alexander wrote:
> > [Public]
> >
> > > -----Original Message-----
> > > From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > > Sent: Monday, March 7, 2022 4:17 AM
> > > To: linux-kernel@...r.kernel.org
> > > Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>;
> > > stable@...r.kernel.org; Koenig, Christian
> > > <Christian.Koenig@....com>; Wu, Hersen <hersenxs.wu@....com>;
> Anson
> > > Jacob <Anson.Jacob@....com>; Wentland, Harry
> > > <Harry.Wentland@....com>; Siqueira, Rodrigo
> > > <Rodrigo.Siqueira@....com>; Gutierrez, Agustin
> > > <Agustin.Gutierrez@....com>; Wheeler, Daniel
> > > <Daniel.Wheeler@....com>; Zhuo, Qingqing (Lillian)
> > > <Qingqing.Zhuo@....com>; Deucher, Alexander
> > > <Alexander.Deucher@....com>; Sasha Levin <sashal@...nel.org>
> > > Subject: [PATCH 5.15 100/262] drm/amd/display: move FPU associated
> > > DSC code to DML folder
> > >
> > > From: Qingqing Zhuo <qingqing.zhuo@....com>
> > >
> > > [ Upstream commit d738db6883df3e3c513f9e777c842262693f951b ]
> > >
> > > [Why & How]
> > > As part of the FPU isolation work documented in
> > >
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpa
> > > tc
> hwork.freedesktop.org%2Fseries%2F93042%2F&amp;data=04%7C01%7Calex
> > >
> ander.deucher%40amd.com%7Cf4f4d5bfb9f74edfb8b108da001e6d8f%7C3dd
> > >
> 8961fe4884e608e11a82d994e183d%7C0%7C0%7C637822427968538535%7CUn
> > >
> known%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6
> > >
> Ik1haWwiLCJXVCI6Mn0%3D%7C3000&amp;sdata=2Mm24%2FPkRkih%2BToJ
> > > oBGx2wpeth0Z0Rv3dG77D06fHbw%3D&amp;reserved=0, isolate code
> that
> > > uses FPU in DSC to DML, where all FPU code should locate.
> > >
> > > This change does not refactor any functions but move code around.
> > >
> >
> > This is not a really bug fix, just general reworking of the FP code.  I don't
> know that this is stable material.
> 
> I think it's needed for a follow-on patch in this series, right?

I'm not sure.  This series comes from Sasha.  I'm not sure what his dependency chain looks like.

Alex