linux-kernel - Re: [PATCH v3 2/6] drm/msm/dsi: set video mode widebus enable bit when widebus is enabled

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Date: Mon, 8 Apr 2024 17:43:43 +0800
From: Jun Nie <jun.nie@...aro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@...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>, 
	Jessica Zhang <quic_jesszhan@...cinc.com>, Vinod Koul <vkoul@...nel.org>, 
	linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
	Jonathan Marek <jonathan@...ek.ca>
Subject: Re: [PATCH v3 2/6] drm/msm/dsi: set video mode widebus enable bit
 when widebus is enabled

Dmitry Baryshkov <dmitry.baryshkov@...aro.org> 于2024年4月3日周三 18:10写道：
>
> On Wed, 3 Apr 2024 at 12:11, Jun Nie <jun.nie@...aro.org> wrote:
> >
> > From: Jonathan Marek <jonathan@...ek.ca>
> >
> > The value returned by msm_dsi_wide_bus_enabled() doesn't match what the
> > driver is doing in video mode. Fix that by actually enabling widebus for
> > video mode.
> >
> > Fixes: efcbd6f9cdeb ("drm/msm/dsi: Enable widebus for DSI")
> > Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> > Signed-off-by: Jun Nie <jun.nie@...aro.org>
>
> You have ignored all the review comments that were provided for v1.
> None of the tags were picked up either.
Just find that It was an accident that I cherry-picked wrong patch.
>
> Have you posted this for internal review like I have explicitly asked you?
Sorry, I guess I skipped your word in depression when I read the email.
>
> > ---
> >  drivers/gpu/drm/msm/dsi/dsi.xml.h  | 1 +
> >  drivers/gpu/drm/msm/dsi/dsi_host.c | 2 ++
> >  2 files changed, 3 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/msm/dsi/dsi.xml.h b/drivers/gpu/drm/msm/dsi/dsi.xml.h
> > index 2a7d980e12c3..f0b3cdc020a1 100644
> > --- a/drivers/gpu/drm/msm/dsi/dsi.xml.h
> > +++ b/drivers/gpu/drm/msm/dsi/dsi.xml.h
> > @@ -231,6 +231,7 @@ static inline uint32_t DSI_VID_CFG0_TRAFFIC_MODE(enum dsi_traffic_mode val)
> >  #define DSI_VID_CFG0_HSA_POWER_STOP                            0x00010000
> >  #define DSI_VID_CFG0_HBP_POWER_STOP                            0x00100000
> >  #define DSI_VID_CFG0_HFP_POWER_STOP                            0x01000000
> > +#define DSI_VID_CFG0_DATABUS_WIDEN                             0x02000000
> >  #define DSI_VID_CFG0_PULSE_MODE_HSA_HE                         0x10000000
>
> From the top of the file:
>
> /* Autogenerated file, DO NOT EDIT manually!
This is my fault, I did not notice the top of this file totally. Will
fix it in next version.

>
> >
> >  #define REG_DSI_VID_CFG1                                       0x0000001c
> > diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> > index 9d86a6aca6f2..2a0422cad6de 100644
> > --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> > +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> > @@ -754,6 +754,8 @@ static void dsi_ctrl_enable(struct msm_dsi_host *msm_host,
> >                 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
> >                 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
> >                 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
> > +               if (msm_dsi_host_is_wide_bus_enabled(&msm_host->base))
> > +                       data |= DSI_VID_CFG0_DATABUS_WIDEN;
> >                 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
> >
> >                 /* Do not swap RGB colors */
> >
> > --
> > 2.34.1
> >
>
>
> --
> With best wishes
> Dmitry