From: Robert Foss <robert.foss@linaro.org>
To: Xin Ji <xji@analogixsemi.com>
Cc: "Laurent Pinchart" <laurent.pinchart@ideasonboard.com>,
"Nícolas F. R. A. Prado" <nfraprado@collabora.com>,
a.hajda@samsung.com, narmstrong@baylibre.com,
dan.carpenter@oracle.com, jonas@kwiboo.se,
jernej.skrabec@gmail.com, airlied@linux.ie, daniel@ffwll.ch,
sam@ravnborg.org, pihsun@chromium.org, tzungbi@google.com,
maxime@cerno.tech, drinkcat@google.com, hsinyi@chromium.org,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
bliang@analogixsemi.com, qwen@analogixsemi.com,
robh+dt@kernel.org, devicetree@vger.kernel.org,
"Chen-Yu Tsai" <wenst@chromium.org>
Subject: Re: [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature
Date: Mon, 28 Mar 2022 11:54:12 +0200 [thread overview]
Message-ID: <CAG3jFysvDa2FS3NS6f2sXAid_TmrXyb9vCADN87v=mJ-txGp0A@mail.gmail.com> (raw)
In-Reply-To: <20220321115226.GA1484106@anxtwsw-Precision-3640-Tower>
> > > > > > - DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> > > > > > + bus_type = V4L2_FWNODE_BUS_TYPE_PARALLEL;
> > > > > > + mipi_lanes = MAX_LANES_SUPPORT;
> > > > > > + ep0 = of_graph_get_endpoint_by_regs(np, 0, 0);
> > > > > > + if (ep0) {
> > > > > > + if (of_property_read_u32(ep0, "bus-type", &bus_type))
> > > > > > + bus_type = 0;
> > > > > > +
> > > > > > + mipi_lanes = of_property_count_u32_elems(ep0, "data-lanes");
> > > > > > + }
> > > > > > +
> > > > > > + if (bus_type == V4L2_FWNODE_BUS_TYPE_PARALLEL) /* bus type is Parallel(DSI) */
> > > > >
> > > > > This is not correct *at all*. V4L2_FWNODE_BUS_TYPE_PARALLEL has nothing
> > > > > to do with DSI. DSI stands for Digital *Serial* Interface. If anything,
> > > > > the V4L2_FWNODE_BUS_TYPE_PARALLEL type would map better to DPI, even if
> > > > > it's not an exact match.
> > > > >
> > > > > This patch has landed in v5.17-rc1, along with the corresponding
> > > > > bindings. As DT bindings are an ABI, we should really fix this before
> > > > > v5.17 is released. There is no DSI bus types defined in DT, and adding
> > > > > one as a fix so late in the v5.17-rc cycle seems a bit of a stretch to
> > > > > me (unless Rob disagrees).
> > > > >
> > > > > It would seem best to revert this series and the corresponding bindings,
> > > > > and retry in v5.18.
> > > >
> > > > There is a DT patch using this property that is already queued up for 5.17
> > > > in the soc tree:
> > > >
> > > > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220214200507.2500693-1-nfraprado%40collabora.com%2F&data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=KbitBhnvGWfpHu6PNLUmrgdqcoZbXaA3hGwq9iAjQfI%3D&reserved=0
> > > >
> > > > merged here:
> > > >
> > > > https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgit.kernel.org%2Fsoc%2Fsoc%2Fc%2F32568ae37596b529628ac09b875f4874e614f63f&data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=YJAs0IPxR0hrHpGR7K00itcTIF9cnz4L4ta%2B9ACQdSk%3D&reserved=0
> > > >
> > > > We will need to revert that one as well.
> > >
> > > I just submitted a series reverting the dt-binding change + the
> > > related commit to "mt8183: jacuzzi".
> > > Can I get a quick r-b/a-b in order to get this into v5.17.
> > >
> > > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220307154558.2505734-3-robert.foss%40linaro.org%2F&data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=S5ScH2jid3ZRobvO%2Fl2nVgdOvFHNj1nWafTQYG3L9d0%3D&reserved=0
> > >
> >
> > v2 of revert submitted.
> >
> > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore.kernel.org%2Fall%2F20220308094911.2680291-1-robert.foss%40linaro.org%2F&data=04%7C01%7Cxji%40analogixsemi.com%7C69542695a9cd42cff5a508da00ea7baa%7Cb099b0b4f26c4cf59a0fd5be9acab205%7C0%7C0%7C637823304343387964%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=D6ulS16g4v4x0u23OtYRrSeitTqllWwDzPiT%2BxMcQQg%3D&reserved=0
> >
> > Xin: Will you spin a series that adds DPI support and re-enables DPI
> > for anx7625? Additionally, "mt8183: jacuzzi" will have to have DPI
> > re-enabled.
> Hi Robert Foss, I'm little confused, do I need resend this serial or
> send a patch based on currently define(V4L2_FWNODE_BUS_TYPE_PARALLEL)?
>
> And use V4L2_FWNODE_BUS_TYPE_PARALLEL for DPI, other value for DSI
> setup?
V4L2_FWNODE_BUS_TYPE_PARALLEL is not meant to be used for DPI, but
rather is used to represtent CPI. So another enum (something along the
lines of V4L2_FWNODE_BUS_TYPE_DPI) needs to be defined, and then this
series needs to use this new enum.
I'd like to see the following:
- Introduction of V4L2_FWNODE_BUS_TYPE_DPI
- Reworking this series to use V4L2_FWNODE_BUS_TYPE_DPI
- Reworking "mt8183: jacuzzi" to use V4L2_FWNODE_BUS_TYPE_DPI
Does that make sense?
Rob.
next prev parent reply other threads:[~2022-03-28 9:54 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-05 3:19 [PATCH v12 1/4] dt-bindings:drm/bridge:anx7625:add vendor define Xin Ji
2021-11-05 3:19 ` [PATCH v12 2/4] drm/bridge: anx7625: fix not correct return value Xin Ji
2021-11-05 3:19 ` [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature Xin Ji
2022-03-06 17:13 ` Laurent Pinchart
2022-03-07 3:22 ` Xin Ji
2022-03-07 3:30 ` Laurent Pinchart
2022-03-07 4:32 ` Xin Ji
2022-03-07 4:47 ` Laurent Pinchart
2022-03-07 5:09 ` Xin Ji
2022-03-07 5:17 ` Laurent Pinchart
2022-03-07 5:17 ` Hsin-Yi Wang
2022-03-07 5:35 ` Xin Ji
2022-03-07 6:12 ` Chen-Yu Tsai
2022-03-07 15:49 ` Robert Foss
2022-03-08 10:00 ` Robert Foss
2022-03-21 11:52 ` Xin Ji
2022-03-28 9:54 ` Robert Foss [this message]
2022-03-28 11:10 ` Xin Ji
2021-11-05 3:19 ` [PATCH v12 4/4] drm/bridge: anx7625: add HDMI audio function Xin Ji
-- strict thread matches above, loose matches on Subject: below --
2021-11-04 3:36 [PATCH v12 3/4] drm/bridge: anx7625: add MIPI DPI input feature Xin Ji
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