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    SubjectRe: [IMX] [DRM]: suspend/resume support
    On Wed, Jun 19, 2019 at 8:59 PM Pintu Agarwal <pintu.ping@gmail.com> wrote:

    > > > This scenario is not with suspend/resume.
    > > > This hang is, when we make hdmi as a loadable module (.ko) and trying
    > > > to install it after resume.
    > > > In this case, suspend/resume will not come into picture. Not sure why
    > > > it still hangs.
    > > > Do you have any clue for this scenario?
    > >
    > > I haven't tried this one.
    > >

    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 ?

    Thanks,
    Pintu

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