linux-kernel - Re: [REPOST PATCH v4 08/13] drm/msm/disp/dpu1: Don't use DSC with mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Yg3mvEvqYs89dJWI@matsya>
Date:   Thu, 17 Feb 2022 11:40:04 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc:     Rob Clark <robdclark@...il.com>, linux-arm-msm@...r.kernel.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jonathan Marek <jonathan@...ek.ca>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org
Subject: Re: [REPOST PATCH v4 08/13] drm/msm/disp/dpu1: Don't use DSC with
 mode_3d

On 16-02-22, 19:11, Abhinav Kumar wrote:
> 
> 
> On 2/10/2022 2:34 AM, Vinod Koul wrote:
> > We cannot enable mode_3d when we are using the DSC. So pass
> > configuration to detect DSC is enabled and not enable mode_3d
> > when we are using DSC
> > 
> > We add a helper dpu_encoder_helper_get_dsc() to detect dsc
> > enabled and pass this to .setup_intf_cfg()
> > 
> > Signed-off-by: Vinod Koul <vkoul@...nel.org>
> 
> We should not use 3D mux only when we use DSC merge topology.
> I agree that today we use only 2-2-1 topology for DSC which means its using
> DSC merge.
> 
> But generalizing that 3D mux should not be used for DSC is not right.
> 
> You can detect DSC merge by checking if there are two encoders and one
> interface in the topology and if so, you can disable 3D mux.

Right now with DSC we disable that as suggested by Dmitry last time.
Whenever we introduce merge we should revisit this, for now this should
suffice

-- 
~Vinod