linux-kernel - Re: [PATCH 3/5] drm/msm: mdss: Add X1E80100 support

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Date: Thu, 8 Feb 2024 15:42:04 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abel Vesa <abel.vesa@...aro.org>
Cc: Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>, 
	Sean Paul <sean@...rly.run>, Marijn Suijten <marijn.suijten@...ainline.org>, 
	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>, Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Neil Armstrong <neil.armstrong@...aro.org>, linux-arm-msm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] drm/msm: mdss: Add X1E80100 support

On Thu, 8 Feb 2024 at 15:37, Abel Vesa <abel.vesa@...aro.org> wrote:
>
> On 24-01-29 17:11:25, Dmitry Baryshkov wrote:
> > On Mon, 29 Jan 2024 at 15:19, Abel Vesa <abel.vesa@...aro.org> wrote:
> > >
> > > Add support for MDSS on X1E80100.
> > >
> > > Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> > > ---
> > >  drivers/gpu/drm/msm/msm_mdss.c | 10 ++++++++++
> > >  1 file changed, 10 insertions(+)
> > >
> > > diff --git a/drivers/gpu/drm/msm/msm_mdss.c b/drivers/gpu/drm/msm/msm_mdss.c
> > > index 455b2e3a0cdd..eddf7fdbb60a 100644
> > > --- a/drivers/gpu/drm/msm/msm_mdss.c
> > > +++ b/drivers/gpu/drm/msm/msm_mdss.c
> > > @@ -564,6 +564,15 @@ static const struct msm_mdss_data sdm670_data = {
> > >         .highest_bank_bit = 1,
> > >  };
> > >
> > > +static const struct msm_mdss_data x1e80100_data = {
> > > +       .ubwc_enc_version = UBWC_4_0,
> > > +       .ubwc_dec_version = UBWC_4_3,
> > > +       .ubwc_swizzle = 6,
> > > +       .ubwc_static = 1,
> > > +       .highest_bank_bit = 2,
> > > +       .macrotile_mode = 1,
> >
> > Missing .reg_bus_bw, LGTM otherwise
>
> Dmitry, I do not have the exact value yet.
>
> Can I come back with a subsequent (different) patch to add it at a later stage
> when I have that information?
>
> I see no point in holding display support any further since it works
> fine with the default bandwith.
>
> If yes, I'll respin this series right away, but without the reg_bus_bw.

Please add a TODO or FIXME comment there.

>
> >
> > > +};
> > > +
> > >  static const struct msm_mdss_data sdm845_data = {
> > >         .ubwc_enc_version = UBWC_2_0,
> > >         .ubwc_dec_version = UBWC_2_0,
> > > @@ -655,6 +664,7 @@ static const struct of_device_id mdss_dt_match[] = {
> > >         { .compatible = "qcom,sm8450-mdss", .data = &sm8350_data },
> > >         { .compatible = "qcom,sm8550-mdss", .data = &sm8550_data },
> > >         { .compatible = "qcom,sm8650-mdss", .data = &sm8550_data},
> > > +       { .compatible = "qcom,x1e80100-mdss", .data = &x1e80100_data},
> > >         {}
> > >  };
> > >  MODULE_DEVICE_TABLE(of, mdss_dt_match);
> > >
> > > --
> > > 2.34.1
> > >
> >
> >
> > --
> > With best wishes
> > Dmitry



-- 
With best wishes
Dmitry