I have an i.MX 8MQ EVK and now evaluating.
I'm trying to output 4K video via HDMI port, but it does not work.
I was download 'L4.9.88_2.0.0_mfg-tool_MX8MQ.tar.gz' from NXP website and make a SD card for boot that using a script 'mfgtool2-yocto-mx8-evk-sd2.vbs' with Mfgtool2.
After making, boot from SD card.
Default is displaied by 1080p60 from HDMI port and it works.
I refered some post and changed bootargs setting to 4K output, but not works.
Getting an HDMI output on IMX8QMLPDDR4ARM2
Monitor not working for MCIMX8M-EVK
Getting a 4K HDMI output on MCIMX8M-EVK
Is it correct procedure?
Or the OS does not support 4K yet?
I'll attached boot log.
Best regards,
tomo
Thank you for your reply.
I can see the Linux desktop by 1080p when even at 4K setting.
I tried '3840x2180-32@60', '3840x2180-32@30', '3840x2180-32@25', but result was same.
I think it may be ignoring 4K setting because pixclk will overrange.
(You can see below messages in log file.)
-----
[ 1.140399] [drm] Pixel clock frequency: 712254 kHz, character clock frequency: 712254, color depth is 8-bit.
[ 1.140413] [drm:phy_cfg_t28hpc] *ERROR* This pixel clock frequency (712254 kHz) is not supported.
[ 1.140420] [drm:hdmi_phy_init_t28hpc] *ERROR* failed to set phy pclock
[ 1.140427] [drm:imx_hdp_bridge_mode_set] *ERROR* Failed to initialise HDP PHY
-----
I checked below path.
root@imx8mqevk:/sys/class/graphics/fb0# cat mode
root@imx8mqevk:/sys/class/graphics/fb0# cat modes
U:3840x2160p-0
/sys/class/graphics/fb0/mode was displayed nothing.
Best regards,
tomo