linux-kernel - Re: [PATCH v2 4/4] drm/bridge: anx7625: Use DPI bus type

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Message-ID: <CAG3jFysJLoQ2DMYw0oOfbQM3ifBmAhNLMxjPDEt12jq8sKCcSg@mail.gmail.com>
Date:   Mon, 23 May 2022 10:37:25 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Chen-Yu Tsai <wenst@...omium.org>
Cc:     Xin Ji <xji@...logixsemi.com>, Daniel Vetter <daniel@...ll.ch>,
        Neil Armstrong <narmstrong@...libre.com>,
        David Airlie <airlied@...ux.ie>, qwen@...logixsemi.com,
        Jonas Karlman <jonas@...boo.se>, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        bliang@...logixsemi.com,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH v2 4/4] drm/bridge: anx7625: Use DPI bus type

On Mon, 23 May 2022 at 09:18, Chen-Yu Tsai <wenst@...omium.org> wrote:
>
> On Mon, May 23, 2022 at 11:13 AM Xin Ji <xji@...logixsemi.com> wrote:
> >
> > On Sat, May 21, 2022 at 06:28:42PM +0200, Daniel Vetter wrote:
> > > On Sat, 21 May 2022 at 18:07, Daniel Vetter <daniel@...ll.ch> wrote:
> > > >
> > > > On Tue, 17 May 2022 at 18:09, Robert Foss <robert.foss@...aro.org> wrote:
> > > > >
> > > > > On Mon, 25 Apr 2022 at 11:14, Xin Ji <xji@...logixsemi.com> wrote:
> > > > > >
> > > > > > On Mon, Apr 25, 2022 at 04:24:50PM +0800, Chen-Yu Tsai wrote:
> > > > > > > On Fri, Apr 22, 2022 at 10:13 PM Robert Foss <robert.foss@...aro.org> wrote:
> > > > > > > >
> > > > > > > > On Fri, 22 Apr 2022 at 16:01, Robert Foss <robert.foss@...aro.org> wrote:
> > > > > > > > >
> > > > > > > > > On Fri, 22 Apr 2022 at 10:49, Xin Ji <xji@...logixsemi.com> wrote:
> > > > > > > > > >
> > > > > > > > > > As V4L2_FWNODE_BUS_TYPE_PARALLEL not properly descript for DPI
> > > > > > > > > > interface, this patch use new defined V4L2_FWNODE_BUS_TYPE_DPI for it.
> > > > > > > > > >
> > > > > > > > > > Fixes: fd0310b6fe7d ("drm/bridge: anx7625: add MIPI DPI input feature")
> > > > > > > > > > Signed-off-by: Xin Ji <xji@...logixsemi.com>
> > > > > > > > > > ---
> > > > > > > > > >  drivers/gpu/drm/bridge/analogix/anx7625.c | 8 ++++----
> > > > > > > > > >  1 file changed, 4 insertions(+), 4 deletions(-)
> > > > > > > > > >
> > > > > > > > > > diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > > > > index 376da01243a3..71df977e8f53 100644
> > > > > > > > > > --- a/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > > > > +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> > > > > > > > > > @@ -1623,14 +1623,14 @@ static int anx7625_parse_dt(struct device *dev,
> > > > > > > > > >
> > > > > > > > > >         anx7625_get_swing_setting(dev, pdata);
> > > > > > > > > >
> > > > > > > > > > -       pdata->is_dpi = 1; /* default dpi mode */
> > > > > > > > > > +       pdata->is_dpi = 0; /* default dsi mode */
> > > > > > > > > >         pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
> > > > > > > > > >         if (!pdata->mipi_host_node) {
> > > > > > > > > >                 DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
> > > > > > > > > >                 return -ENODEV;
> > > > > > > > > >         }
> > > > > > > > > >
> > > > > > > > > > -       bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > > > > > > +       bus_type = 0;
> > > > > > > > > >         mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > > > > >         ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > > > > > >         if (ep0) {
> > > > > > > > > > @@ -1640,8 +1640,8 @@ static int anx7625_parse_dt(struct device *dev,
> > > > > > > > > >                 mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > > > > > >         }
> > > > > > > > > >
> > > > > > > > > > -       if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > > > > > > > > -               pdata->is_dpi = 0;
> > > > > > > > > > +       if (bus_type == V4L2_FWNODE_BUS_TYPE_DPI) /* bus type is DPI */
> > > > > > > > > > +               pdata->is_dpi = 1;
> > > > > > > > > >
> > > > > > > > > >         pdata->mipi_lanes = mipi_lanes;
> > > > > > > > > >         if (pdata->mipi_lanes > MAX_LANES_SUPPORT || pdata->mipi_lanes <= 0)
> > > > > > > > >
> > > > > > > > > Reviewed-by: Robert Foss <robert.foss@...aro.org>
> > > > > > > >
> > > > > > > > Acked-by: Robert Foss <robert.foss@...aro.org>
> > > > > > >
> > > > > > > Tested-by: Chen-Yu Tsai <wenst@...omium.org>
> > > > > > >
> > > > > > > Confirmed this fixes the display on Juniper (Acer Chromebook Spin 311) on
> > > > > > > mainline (next-20220422).
> > > > > > >
> > > > > > > Xin, in the future, please send the whole series to all recipients of
> > > > > > > all patches listed by get_maintainers.pl, not just the recipients of
> > > > > > > each patch. In the case of this series, they should have been sent
> > > > > > > to all of the mailing lists (media, devicetree, dri-devel) so that
> > > > > > > everyone has the same, full view of the patches.
> > > > > > Hi ChenYu, OK, I'll send to all media, devicetree, dri-devel next time.
> > > > > > Thanks,
> > > > > > Xin
> > > > > > >
> > > > > > > ChenYu
> > > > >
> > > > > Applied 3/4 + 4/4 to drm-misc-next.
> > > >
> > > > This patch doesn't even compile. Can you pls fix this up asap? Also
> > > > pls compile-test before pushing ...
> > >
> > > Marek says the prerequisite landed through linux-media, and that's why
> > > it compilers on linux-next but not in drm-misc-next.
> > >
> > > Don't do that.
> > >
> > > Instead:
> > > - merge all patches through one branch, with the foreign patches acked
> > > for that merge patch
> > > - wait until you can backmerge all the dependencies
> > > - do a topic branch
> > >
> > > This probably needs to be reverted here and instead merged through
> > > linux-media. Or you wait until -rc1 and then apply it to
> > > drm-misc-next.
> > > -Daniel
> > Hi Daniel, I use git send-email to upstream patch and automatically
> > generated reviewer list, so patch 1/4 and 2/4 send to linux-media, and
> > these 2 patches already merged in linux-media.
>
> This is one of the reasons why you should always send the "full" series
> to all recipients. That way people, especially maintainers, are more
> likely to notice build time cross tree dependencies like this one, and
> work towards a common resolution.

This mistake is mine, and I think the best solution is to revert 3+4 until rc1.

I'll send out the revert patches to the ML right away.


Rob.