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

Sandor Yu
2025-01-07T14:42:59Z

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.

B.R
Sandor

>
> 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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