linux-kernel - Re: [RFC 0/8] MIPS: CI20: add HDMI out support

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Message-ID: <20200227122325.GA7587@ravnborg.org>
Date:   Thu, 27 Feb 2020 13:23:25 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Paul Cercueil <paul@...pouillou.net>,
        Paul Boddie <paul@...die.org.uk>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-mips@...r.kernel.org,
        linux-gpio@...r.kernel.org, kernel@...a-handheld.com,
        letux-kernel@...nphoenux.org
Subject: Re: [RFC 0/8] MIPS: CI20: add HDMI out support

Hi Nikolaus.

On Wed, Feb 26, 2020 at 08:12:52PM +0100, H. Nikolaus Schaller wrote:
> This patch series adds HDMI output to the jz4780/CI20 board.
> 
> It is based on taking the old 3.18 vendor kernel and trying
> to achieve the same with modern DTS setup and new/modified
> drivers.
> 
> Unfortunately, in this first RFC, only EDID and creation of
> /dev/fb0 are working. Also, HDMI hot plugging is detected.
> 
> But there is no HDMI output signal. So some tiny piece seems
> to be missing to enable/configure the Synposys HDMI controller.
> 
> We need help from the community to fix this.
> 
> Note: device tree bindings are from 2015 and still seem to
> fit - except they are not in yaml format.
> 
> Original authors of most patches are
> * Paul Boddie <paul@...die.org.uk>
> * Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>
> 
> 
> H. Nikolaus Schaller (2):
>   drm: ingenic-drm: add MODULE_DEVICE_TABLE
>   MIPS: CI20: defconfig: configure for DRM_DW_HDMI_JZ4780
> 
> Paul Boddie (4):
>   drm: ingenic: add jz4780 Synopsys HDMI driver.
>   pinctrl: ingenic: add hdmi-ddc pin control group
>   MIPS: DTS: jz4780: account for Synopsys HDMI driver and LCD controller
>   MIPS: DTS: CI20: add HDMI setup
> 
> Zubair Lutfullah Kakakhel (2):
>   dt-bindings: video: Add jz4780-lcd binding
>   dt-bindings: video: Add jz4780-hdmi binding
> 
>  .../bindings/display/ingenic-jz4780-hdmi.txt  |  41 ++++++
>  .../bindings/display/ingenic-jz4780-lcd.txt   |  39 ++++++
New bindings in DT Schema format please...
We want to have then in a formal launguage so we can use these
to verify the DT files.

	Sam