linux-kernel - Re: [PATCH 03/21] drm/msm/dsi: pass the right width to dsc

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Message-ID: <CABymUCM8zu1TY20kuEn7Dt9uDDC0hL9YAimWsTXnxDJeJFuiog@mail.gmail.com>
Date: Wed, 4 Sep 2024 00:09:29 +0800
From: Jun Nie <jun.nie@...aro.org>
To: Marijn Suijten <marijn.suijten@...ainline.org>
Cc: Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>, 
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>, 
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, linux-arm-msm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/21] drm/msm/dsi: pass the right width to dsc

Marijn Suijten <marijn.suijten@...ainline.org> 于2024年9月3日周二 18:12写道：
>
> On 2024-08-29 18:17:32, Jun Nie wrote:
> > Data width for dsc engine is aligned with pipe, not with whole screen
> > width. Because the width may be halved in DSI bonded case.
> >
> > The dsc width is not related to the timing with back front porch in
> > later stage, so update dsc timing earlier.
> >
> > Signed-off-by: Jun Nie <jun.nie@...aro.org>
>
> I already sent a patch for this:
> https://lore.kernel.org/linux-arm-msm/20240417-drm-msm-initial-dualpipe-dsc-fixes-v1-2-78ae3ee9a697@somainline.org/
>
> And then came up with a better solution, outlined in:
> https://lore.kernel.org/linux-arm-msm/7fqwkryeumkt7zxsec6va7ys22nfs3tr4rrcz323extdz3f6zv@w4uu2lk4uh7v/
>
> Would you mind dropping this patch so that I can send a better solution?

Sure. I am happy with a better solution from you.
>
> > ---
> >  drivers/gpu/drm/msm/dsi/dsi_host.c | 13 ++++++-------
> >  1 file changed, 6 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> > index 7a4d9c071be5a..5abade8f26b88 100644
> > --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> > +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> > @@ -953,7 +953,7 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi)
> >                       return;
> >               }
> >
> > -             dsc->pic_width = mode->hdisplay;
> > +             dsc->pic_width = hdisplay;
>
> The other part of this already happened in patch 02/21?
>
> - Marijn
>
Patch 02/21 is just for parameter validation, not directly related to
this patch.

-Jun