linux-kernel - [PATCH v1 0/1] Enable HDMI output support on the Debix Model A SBC

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Date: Mon, 15 Apr 2024 12:41:26 +0100
From: Christopher Obbard <chris.obbard@...labora.com>
To: linux-kernel@...r.kernel.org
Cc: Daniel Scally <dan.scally@...asonboard.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	kernel@...labora.com,
	Christopher Obbard <chris.obbard@...labora.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Fabio Estevam <festevam@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	devicetree@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v1 0/1] Enable HDMI output support on the Debix Model A SBC

This series brings up the HDMI output on the Debix Model A SBC.

With support for the HDMI transmitter for the i.MX8MP SoC now merged[0],
we can now enable the HDMI output on the Debix Model A SBC.

The pinctrl values were blindly taken from the downstream BSP[1] and should
be checked by someone who knows this platform better than myself.

Also, with a 4K display there were a drm error with no output on the
display, but this error did not occur with a 1080P display:

   imx-lcdif 32fc6000.display-controller: [drm] *ERROR* fbdev-dma: Failed to setup generic emulation (ret=-12)

It would be interesting to see if this error is present for others on a
different i.MX8MP device. I didn't have time to check this further and I
assume the issue to be in the driver rather than specific to this SBC, so
should not block this patch, but please correct me if I am wrong.

[0]: https://lore.kernel.org/all/20240227220444.77566-1-aford173@gmail.com/
[1]: https://github.com/debix-tech/linux/blob/debix/arch/arm64/boot/dts/freescale/imx8mp-debix-io-board.dts#L1025

Christopher Obbard (1):
  arm64: dts: imx8mp-debix-model-a: Add HDMI output support

 .../dts/freescale/imx8mp-debix-model-a.dts    | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)

-- 
2.43.0