[IMX] [DRM]: suspend/resume support

[Fabio Estevam]

On Fri, Jun 21, 2019 at 12:13 PM Pintu Agarwal <pintu.ping at gmail.com> wrote:

> Okay there is some update on the 2nd part.
> Now I am able to successfully install all imx modules after the resume
> (no hang).
> But, I got some errors after install finish:
> [drm] disabling vblank on crtc 1
> [IMX]: imx_drm_disable_vblank - called
> [drm:drm_atomic_helper_commit_cleanup_done] *ERROR* [CRTC:24:crtc-0]
> flip_done timed out
>
> Also I am able to start the weston successfully.
> But I see LCD/HDMI display is not working (only some backlight is visible).
>
> And, I noticed, weston also reports the following errors:
> imx-ipuv3 2400000.ipu: DC stop timeout after 50 ms
> [IMX]: drm_crtc_vblank_off - called
> [IMX]: imx_drm_disable_vblank - called
> INFO: rcu_preempt detected stalls on CPUs/tasks: { 1} (detected by 0,
> t=6002 jiffies, g=289, c=288, q=8)
> Task dump for CPU 1:
> weston          R running      0   306      1 0x00000000
> [<c05282d8>] (__schedule) from [<00080193>] (0x80193)
>
> Do you have any clue about these errors ?

Which kernel version is this?