From: Rob Herring <robh@kernel.org>
To: "Paweł Anikiel" <panikiel@google.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
airlied@gmail.com, akpm@linux-foundation.org,
conor+dt@kernel.org, daniel@ffwll.ch, dinguyen@kernel.org,
hverkuil-cisco@xs4all.nl, krzysztof.kozlowski+dt@linaro.org,
maarten.lankhorst@linux.intel.com, mchehab@kernel.org,
mripard@kernel.org, tzimmermann@suse.de,
devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
chromeos-krk-upstreaming@google.com, ribalda@chromium.org
Subject: Re: [PATCH v2 8/9] media: dt-bindings: Add Intel Displayport RX IP
Date: Tue, 27 Feb 2024 08:29:11 -0600 [thread overview]
Message-ID: <20240227142911.GB3863852-robh@kernel.org> (raw)
In-Reply-To: <CAM5zL5q0oKoTMR0jSwYVAChCOJ9iKYPRFiU1vH4qDqhHALKz4w@mail.gmail.com>
On Mon, Feb 26, 2024 at 11:59:42AM +0100, Paweł Anikiel wrote:
> On Mon, Feb 26, 2024 at 10:13 AM Krzysztof Kozlowski
> <krzysztof.kozlowski@linaro.org> wrote:
> >
> > On 21/02/2024 17:02, Paweł Anikiel wrote:
> > > The Intel Displayport RX IP is a part of the DisplayPort Intel FPGA IP
> > > Core. It implements a DisplayPort 1.4 receiver capable of HBR3 video
> > > capture and Multi-Stream Transport. The user guide can be found here:
> > >
> > > https://www.intel.com/programmable/technical-pdfs/683273.pdf
> > >
> > > Signed-off-by: Paweł Anikiel <panikiel@google.com>
> > > ---
> > > .../devicetree/bindings/media/intel,dprx.yaml | 160 ++++++++++++++++++
> > > 1 file changed, 160 insertions(+)
> > > create mode 100644 Documentation/devicetree/bindings/media/intel,dprx.yaml
> > >
> > > diff --git a/Documentation/devicetree/bindings/media/intel,dprx.yaml b/Documentation/devicetree/bindings/media/intel,dprx.yaml
> > > new file mode 100644
> > > index 000000000000..31025f2d5dcd
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/media/intel,dprx.yaml
> > > @@ -0,0 +1,160 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/media/intel,dprx.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Intel DisplayPort RX IP
> > > +
> > > +maintainers:
> > > + - Paweł Anikiel <panikiel@google.com>
> > > +
> > > +description: |
> > > + The Intel Displayport RX IP is a part of the DisplayPort Intel FPGA IP
> > > + Core. It implements a DisplayPort 1.4 receiver capable of HBR3 video
> > > + capture and Multi-Stream Transport.
> > > +
> > > + The IP features a large number of configuration parameters, found at:
> > > + https://www.intel.com/content/www/us/en/docs/programmable/683273/23-3-20-0-1/sink-parameters.html
> > > +
> > > + The following parameters have to be enabled:
> > > + - Support DisplayPort sink
> > > + - Enable GPU control
> > > + The following parameters' values have to be set in the devicetree:
> > > + - RX maximum link rate
> > > + - Maximum lane count
> > > + - Support MST
> > > + - Max stream count (only if Support MST is enabled)
> > > +
> > > +properties:
> > > + compatible:
> > > + const: intel,dprx-20.0.1
> > > +
> > > + reg:
> > > + maxItems: 1
> > > +
> > > + interrupts:
> > > + maxItems: 1
> > > +
> > > + intel,max-link-rate:
> > > + $ref: /schemas/types.yaml#/definitions/uint32
> > > + description: Max link rate configuration parameter
> >
> > Please do not duplicate property name in description. It's useless.
> > Instead explain what is this responsible for.
> >
> > Why max-link-rate would differ for the same dprx-20.0.1? And why
> > standard properties cannot be used?
> >
> > Same for all questions below.
>
> These four properties are the IP configuration parameters mentioned in
> the device description. When generating the IP core you can set these
> parameters, which could make them differ for the same dprx-20.0.1.
> They are documented in the user guide, for which I also put a link in
> the description. Is that enough? Or should I also document these
> parameters here?
Use the standard properties: link-frequencies and data-lanes. Those go
under the port(s) because they are inheritly per logical link.
Rob
next prev parent reply other threads:[~2024-02-27 14:29 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-21 16:02 [PATCH v2 0/9] Add Chameleon v3 video support Paweł Anikiel
2024-02-21 16:02 ` [PATCH v2 1/9] media: v4l2-subdev: Add a pad variant of .query_dv_timings() Paweł Anikiel
2024-02-28 11:25 ` Hans Verkuil
2024-02-28 15:34 ` Paweł Anikiel
2024-02-29 8:02 ` Hans Verkuil
2024-02-29 11:33 ` Paweł Anikiel
2024-02-29 12:05 ` Hans Verkuil
2024-02-21 16:02 ` [PATCH v2 2/9] media: Add Chameleon v3 framebuffer driver Paweł Anikiel
2024-02-28 11:24 ` Hans Verkuil
2024-02-28 15:08 ` Paweł Anikiel
2024-02-28 15:14 ` Hans Verkuil
2024-02-21 16:02 ` [PATCH v2 3/9] drm/dp_mst: Move DRM-independent structures to separate header Paweł Anikiel
2024-02-21 16:02 ` [PATCH v2 4/9] lib: Move DisplayPort CRC functions to common lib Paweł Anikiel
2024-02-21 16:02 ` [PATCH v2 5/9] drm/display: Add mask definitions for DP_PAYLOAD_ALLOCATE_* registers Paweł Anikiel
2024-02-21 16:02 ` [PATCH v2 6/9] media: intel: Add Displayport RX IP driver Paweł Anikiel
2024-02-28 12:11 ` Hans Verkuil
2024-02-21 16:02 ` [PATCH v2 7/9] media: dt-bindings: Add Chameleon v3 framebuffer Paweł Anikiel
2024-02-26 9:10 ` Krzysztof Kozlowski
2024-04-23 17:00 ` Paweł Anikiel
2024-02-21 16:02 ` [PATCH v2 8/9] media: dt-bindings: Add Intel Displayport RX IP Paweł Anikiel
2024-02-26 9:12 ` Krzysztof Kozlowski
2024-02-26 10:59 ` Paweł Anikiel
2024-02-26 12:06 ` Krzysztof Kozlowski
2024-02-26 12:43 ` Paweł Anikiel
2024-02-26 17:29 ` Krzysztof Kozlowski
2024-02-27 13:11 ` Paweł Anikiel
2024-02-27 14:24 ` Rob Herring
2024-02-27 14:29 ` Rob Herring [this message]
2024-02-28 11:05 ` Paweł Anikiel
2024-02-28 12:18 ` Krzysztof Kozlowski
2024-02-28 13:09 ` Paweł Anikiel
2024-02-28 18:09 ` Rob Herring
2024-02-29 10:25 ` Paweł Anikiel
2024-03-01 16:26 ` Rob Herring
2024-02-21 16:02 ` [PATCH v2 9/9] ARM: dts: chameleonv3: Add video device nodes Paweł Anikiel
2024-02-26 9:15 ` Krzysztof Kozlowski
2024-02-26 11:09 ` Paweł Anikiel
2024-02-26 12:07 ` Krzysztof Kozlowski
2024-02-26 12:27 ` Paweł Anikiel
2024-02-26 17:30 ` Krzysztof Kozlowski
2024-02-27 11:26 ` Paweł Anikiel
2024-02-23 19:04 ` [PATCH v2 0/9] Add Chameleon v3 video support Conor Dooley
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