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

From: Sam Ravnborg <sam@ravnborg.org>
To: "H. Nikolaus Schaller" <hns@goldelico.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	devicetree@vger.kernel.org, Paul Boddie <paul@boddie.org.uk>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Paul Burton <paulburton@kernel.org>,
	linux-gpio@vger.kernel.org, David Airlie <airlied@linux.ie>,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	Ralf Baechle <ralf@linux-mips.org>,
	linux-mips@vger.kernel.org, Paul Cercueil <paul@crapouillou.net>,
	Andi Kleen <ak@linux.intel.com>, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzk@kernel.org>,
	kernel@pyra-handheld.com, letux-kernel@openphoenux.org,
	"Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [RFC 0/8] MIPS: CI20: add HDMI out support
Date: Thu, 27 Feb 2020 13:23:25 +0100	[thread overview]
Message-ID: <20200227122325.GA7587@ravnborg.org> (raw)
In-Reply-To: <cover.1582744379.git.hns@goldelico.com>

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@boddie.org.uk>
> * Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.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
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