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

Alexander Stein
2025-01-07T16:11:29Z

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
Amtsgericht München, HRB 105018
Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider