Re: [PATCH v9 00/19] Add Freescale i.MX8qxp Display Controller support

From: Liu Ying <victor.liu@nxp.com>
To: Francesco Dolcini <francesco@dolcini.it>
Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
	imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org,
	p.zabel@pengutronix.de, airlied@gmail.com, simona@ffwll.ch,
	maarten.lankhorst@linux.intel.com, mripard@kernel.org,
	tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org,
	conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com, tglx@linutronix.de,
	vkoul@kernel.org, kishon@kernel.org, Frank.Li@nxp.com,
	lumag@kernel.org, aisheng.dong@nxp.com, agx@sigxcpu.org,
	u.kleine-koenig@baylibre.com, dmitry.baryshkov@linaro.org
Subject: Re: [PATCH v9 00/19] Add Freescale i.MX8qxp Display Controller support
Date: Thu, 16 Jul 2026 14:21:31 +0800	[thread overview]
Message-ID: <alh4a66fEro05ShA@raspi> (raw)
In-Reply-To: <20260714193627.GA9616@francesco-nb>

On Tue, Jul 14, 2026 at 09:36:27PM +0200, Francesco Dolcini wrote:
> Hello Liu,

Hello Francesco,

> 
> On Mon, Apr 14, 2025 at 11:50:09AM +0800, Liu Ying wrote:
> > Hi,
> > 
> > This patch series aims to add Freescale i.MX8qxp Display Controller support.
> > 
> > The controller is comprised of three main components that include a blit
> > engine for 2D graphics accelerations, display controller for display output
> > processing, as well as a command sequencer.
> 
> ...
> 
> > 
> > To follow up i.MX8qxp TRM, I changed the controller name to "Display Controller"
> > instead of the previous "DPU".  "DPU" is only mentioned in the SoC block
> > diagram and represents the whole display subsystem which includes the display
> > controller and prefech engines, etc.
> > 
> > With an additional patch[1] for simple-pm-bus.c, this series facilitates
> > testing a LVDS panel on i.MX8qxp MEK.
> > 
> > Please do NOT merge patch 14-19.  They are only used to facilitate testing
> > the LVDS panel.
> 
> What's the plan to conclude this work? What's the latest status?
> I am looking forward to have a way to use the i.MX8QXP display with
> mainline, but to my understanding some required changes on the SOC dtsi
> are not merged.
> 
> Can you help?

I planned to add display controller DT node after prefetch engine support [1]
is picked up so that the prefetch engine could be enabled together with the
display controller.  Just want to avoid a DT that only enables the display
controller or bypasses the prefetch engine.  It makes the display controller
driver simpler.

[1] https://lore.kernel.org/all/20251027-imx8-dc-prefetch-v5-0-4ecb6c6d4941@nxp.com/

> 
> Thanks,
> Francesco
> 

-- 
Regards,
Liu Ying

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