[Bug 212109] New: Analogix ANX6345 bridge fails to initialize after suspend

[Bug 212109] New: Analogix ANX6345 bridge fails to initialize after suspend

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212109

            Bug ID: 212109
           Summary: Analogix ANX6345 bridge fails to initialize after
                    suspend
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.11.4
          Hardware: ARM
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: jaron@kent-dobias.com
        Regression: No

Created attachment 295705
  --> https://bugzilla.kernel.org/attachment.cgi?id=295705&action=edit
kernel config

My hardware is a Pine64 Pinebook, which has an Analogix ANX6345 eDP bridge.
Starting with the 5.11 series, the screen fails to turn on after suspend,
producing the error: '[drm:anx6345_bridge_enable] *ERROR* Failed eDP
transmitter initialization: -13'.

Steps to reproduce:

  1) boot series 5.11 kernel on the Pinebook
  2) close lid
  3) open lid.

Actual results: the display does not turn on.

Expected results: the display turns on.

Build date & hardware: 2021-03-07 on Arch Linux (x86-64 cross compile), run on
a Pine64 Pinebook.

Additional information: the latest 5.10 kernel (5.10.21) compiled with the same
config does not exhibit the bug.

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[Bug 212109] Analogix ANX6345 bridge fails to initialize after suspend

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212109

Jaron Kent-Dobias (jaron@kent-dobias.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jaron@kent-dobias.com
         Regression|No                          |Yes

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[Bug 212109] Analogix ANX6345 bridge fails to initialize after suspend

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212109

--- Comment #1 from Jaron Kent-Dobias (jaron@kent-dobias.com) ---
Created attachment 295707
  --> https://bugzilla.kernel.org/attachment.cgi?id=295707&action=edit
dmesg log ending immediately after bug in question

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[Bug 212109] Analogix ANX6345 bridge fails to initialize after suspend

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=212109

--- Comment #2 from Jaron Kent-Dobias (jaron@kent-dobias.com) ---
Additional information: the 5.10 and 5.11 series appear to attempt different
suspends: the 5.10 enters "s2idle" suspend, while the 5.11 enters "deep"
suspend.

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