HDMI in i.MX8M

[yashavanthashet]

Dear team,

We are using i.MX8M custom board.
In that to get HDMI worked, is there any modification needs to be done to the present dts file "fsl-imx8mq-evk.dts" ?

According to my understandings no any change needs to be done, but for me board is hanging after below prints before DRM initialization
*******************************************************

[    1.103427] xenfs: not registering filesystem on non-xen platform
[    1.108347] pfuze100-regulator 0-0008: Full layer: 2, Metal layer: 1
[    1.113564] pfuze100-regulator 0-0008: FAB: 0, FIN: 0
[    1.118165] pfuze100-regulator 0-0008: pfuze100 found.
[    1.142725] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    1.149056] SuperH (H)SC�ɡ2� "�ɥ�ٕ�ɁJ���ѥ�����镑5R~+HH��1.153784] console [ttymxc0] enabled
[    1.157537] bootconsole [ec_imx6q0] disabled
[    1.162516] 30880000.serial: ttymxc2 at MMIO 0x30880000 (irq = 35, base_baud = 5000000) is a IMX
[    1.171891] 30890000.serial: ttymxc1 at MMIO 0x30890000 (irq = 36, base_baud = 1562500) is a IMX
[    1.181275] 30a60000.serial: ttymxc3 at MMIO 0x30a60000 (irq = 38, base_baud = 5000000) is a IMX
[    1.190937] msm_serial: driver initialized

*******************************************************

Anyone has faced this?

Thanks and Regards,

Yashavantha

[igorpadykov]

Hi Yashavantha

seems you are right, one can verify that proper bsp used

Linux L4.9.51 8MQuad

https://www.nxp.com/webapp/Download?colCode=L4.9.51_8MQ_GA_LINUX_DOCS&Parent_nodeId=1337699481071706... 

try with several panels:

HDMI display not working in i.MX 8M Quad EVM  

third party option

Linux Kernel - i.MX8 - Boundary Devices 

Best regards
igor
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[yashavanthashet]

Hi Igor,

BSP used is proper(fsl-yocto-L4.9.51_mx8mq-ga).

Since debug UART and HDMI pins are used as same as i.MX8M evk I have tried to test the board with reference evk binaries, even with that binaries board stops at same place before DRM initialization.

Thanks and Regards,

Yashavantha

[igorpadykov]

Hi Yashavantha

please try with other panels

Best regards
igor

[yashavanthashet]

Hi Igor,

Thank you for your quick response.

Before I had enabled video and hdmi in uboot, then the above issue was there.

Later disabled both video and HDMI in uboot, then its not hanging in above place but in below place.

******************************************************************

[    1.184760] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.191449] [drm] No driver support for vblank timestamp query.
[    1.197505] imx-drm display-subsystem: bound imx-dcss-crtc.0 (ops dcss_crtc_ops)
[    1.218712]  VIC 2, pixel clock 148500 kHz
[    1.223055] Pixel clock frequency: 148500 kHz, character clock frequency: 148500, color depth is 8-bit.
[    1.232464] VCO frequency is 5940000 kHz

...............................................

...............................................

...............................................

...............................................

[    2.875990] imx-drm display-subsystem: No connectors reported connected with modes
[    2.883581] [drm] Cannot find any crtc or sizes - going 1024x768
[    2.906072] Console: switching to colour frame buffer device 128x48
[    2.925497] imx-drm display-subsystem: fb0:  frame buffer device

************************************************************************

Thanks and Regards,

Yashavantha

[yashavanthashet]

Hi Igor,

Any updates?

Thanks and Regards,

Yashavantha

[igorpadykov · Accepted solution]

Hi Yashavantha

other customers tried it and it is working

HDMI display not working in i.MX 8M Quad EVM  

please try with other panels

Best regards
igor