topic Re: MIPI-DSI power state issue in i.MX Processors

MIPI-DSI power state issue

deven_solanki — Fri, 20 Apr 2018 13:37:52 GMT

Hi Community,

I am exploring power state modes in imx7d-sabresd board with TFT3P5581-E MIPI display from NXP. I am using default binaries from L4.9.11_1.0.0_iMX6UL7D, and imx7d-sdb-mipi-dsi.dtb as a DTB.

The issue I am facing is, when I am going to any power state mode(standby, freeze, mem) and again coming back from power save mode using ON/OFF switch on board.

I am getting below error and my MIPI LCD also doesn't showing anything.

root@imx6ul7d:~# echo mem > /sys/power/state
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.001 seconds) done.
Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Suspending console(s) (use no_console_suspend to debug)
PM: suspend of devices complete after 816.863 msecs
PM: suspend devices took 0.810 seconds
PM: late suspend of devices complete after 1.062 msecs
PM: noirq suspend of devices complete after 1.083 msecs
Disabling non-boot CPUs ...
CPU1: shutdown
Enabling non-boot CPUs ...
CPU1 is up
PM: noirq resume of devices complete after 0.562 msecs
PM: early resume of devices complete after 0.577 msecs
mxc_mipi_dsi_samsung 30760000.mipi-dsi: wait tx done timeout!
mxc_mipi_dsi_samsung 30760000.mipi-dsi: mipid_hx8363_lcd_setup ERR: ret:-110, line:178.
mxc_mipi_dsi_samsung 30760000.mipi-dsi: failed to init mipi lcd.
mxsfb 30730000.lcdif: failed to enable dispdrv:mipi_dsi_samsung
PM: resume of devices complete after 462.565 msecs
PM: resume devices took 0.460 seconds
Restarting tasks ... done.
-sh: echo: write error: Device or resource busy
root@imx6ul7d:~# mxc_mipi_dsi_samsung 30760000.mipi-dsi: wait tx done timeout!
mxc_mipi_dsi_samsung 30760000.mipi-dsi: mipid_hx8363_lcd_setup ERR: ret:-110, line:175.
mxc_mipi_dsi_samsung 30760000.mipi-dsi: failed to init mipi lcd.
mxsfb 30730000.lcdif: failed to enable dispdrv:mipi_dsi_samsung

Same error for freeze and standby also.

Can anyone help me with this issue.

Thanks in advance,

Solanki Deven

Re: MIPI-DSI power state issue

Yuri — Tue, 24 Apr 2018 08:53:43 GMT

Hello,

Is the power state issue the only problem with the MIPI display?

All the rest is working? Rev.C of the SDB may require some rework.

Have a great day,
Yuri

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Re: MIPI-DSI power state issue

deven_solanki — Tue, 24 Apr 2018 10:30:48 GMT

Hi Yuri,

I am using REV D of SDB board.

Yes, power state issue is only with MIPI DSI.

Re: MIPI-DSI power state issue

Yuri — Wed, 25 Apr 2018 04:00:07 GMT

Hello,

I've sent You mail (to check rework).

Regards,

Yuri.

Re: MIPI-DSI power state issue

deven_solanki — Wed, 25 Apr 2018 08:22:21 GMT

Hi Yuri,

Thanks for your immediate reply. I will check it and update you soon.