linux-kernel - Re: [PATCH v20 0/8] Initial support Cadence MHDP8501(HDMI/DP) for i.MX8MQ

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Message-ID: <7783214.EvYhyI6sBW@steina-w>
Date: Tue, 07 Jan 2025 17:11:18 +0100
From: Alexander Stein <alexander.stein@...tq-group.com>
To: "dmitry.baryshkov@...aro.org" <dmitry.baryshkov@...aro.org>,
	"andrzej.hajda@...el.com" <andrzej.hajda@...el.com>,
	"neil.armstrong@...aro.org" <neil.armstrong@...aro.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	"jonas@...boo.se" <jonas@...boo.se>,
	"jernej.skrabec@...il.com" <jernej.skrabec@...il.com>,
	"airlied@...il.com" <airlied@...il.com>,
	"daniel@...ll.ch" <daniel@...ll.ch>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"krzysztof.kozlowski+dt@...aro.org" <krzysztof.kozlowski+dt@...aro.org>,
	"shawnguo@...nel.org" <shawnguo@...nel.org>,
	"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
	"festevam@...il.com" <festevam@...il.com>,
	"vkoul@...nel.org" <vkoul@...nel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-phy@...ts.infradead.org" <"li nux-phy"@lists.infradead.org>,
	"mripard@...nel.org" <mripard@...nel.org>,
	Sandor Yu <sandor.yu@....com>
Cc: "kernel@...gutronix.de" <kernel@...gutronix.de>, dl-linux-imx <linux-imx@....com>, Oliver Brown <oliver.brown@....com>, "sam@...nborg.org" <sam@...nborg.org>
Subject: Re: [PATCH v20 0/8] Initial support Cadence MHDP8501(HDMI/DP) for i.MX8MQ

Hi,

Am Dienstag, 7. Januar 2025, 15:42:56 CET schrieb Sandor Yu:
> Hi Alexander
> 
> It may cause by the first preferred mode in EDID is not supported by driver.
> Please use modetest or other user application to change the video mode to CTA standard modes.
> Such as148.5MHz 1080p60 or 594MHz 3840x2160p60.

No, the EDID does not affect the issue. I resurrected series v14 and
HDMI does work without any issues at 1920x1080.
If I can find a time slot maybe I can check which series version regresses.

Best regards,
Alexander

> 
> >
> > Hi Sandor,
> >
> > thanks for the updates.
> >
> > Am Dienstag, 17. Dezember 2024, 07:51:42 CET schrieb Sandor Yu:
> > > The patch set initial support Cadence MHDP8501(HDMI/DP) DRM bridge
> > > driver and Cadence HDP-TX PHY(HDMI/DP) driver for Freescale i.MX8MQ.
> > >
> > > The patch set compose of DRM bridge drivers and PHY driver.
> > >
> > > Both of them need by patch #1 and #3 to pass build.
> > >
> > > DRM bridges driver patches:
> > >   #1: soc: cadence: Create helper functions for Cadence MHDP
> > >   #2: drm: bridge: cadence: Update mhdp8546 mailbox access functions
> > >   #3: phy: Add HDMI configuration options
> > >   #4: dt-bindings: display: bridge: Add Cadence MHDP8501
> > >   #5: drm: bridge: Cadence: Add MHDP8501 DP/HDMI driver
> > >
> > > PHY driver patches:
> > >   #1: soc: cadence: Create helper functions for Cadence MHDP
> > >   #3: phy: Add HDMI configuration options
> > >   #6: dt-bindings: phy: Add Freescale iMX8MQ DP and HDMI PHY
> > >   #7: phy: freescale: Add DisplayPort/HDMI Combo-PHY driver for
> > > i.MX8MQ
> > >
> > > i.MX8M/TQMa8Mx DT patches:
> > >   #8: Add DT nodes for DCSS/HDMI pipeline
> > >   #9: Enable HDMI for TQMa8Mx/MBa8Mx
> > >
> >
> > I gave this version a new try but unfortunately the display stays black.
> > Although the display pipeline is intialized and even wayland starts.
> > Do you have any idea where to start looking?
> >
> > Best regards,
> > Alexander
> > --
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> >
> 
> 
> 


-- 
TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany
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