[Bug 206575] [amdgpu] [drm] No video signal on resume from suspend, R9 380

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=206575

--- Comment #26 from Noel Maersk (veox+kernel at veox.pw) ---
Will close as resolved shortly.

I did run a second bisect successfully, showing:


f2988e67144a263e33aa3b916457bf3095288c94 is the first new commit
commit f2988e67144a263e33aa3b916457bf3095288c94
Author: Yongqiang Sun <yongqiang.sun at amd.com>
Date:   Fri Oct 18 18:24:59 2019 -0400

    drm/amd/display: optimize bandwidth after commit streams.

    [Why]
    System is unable to enter S0i3 due to DISPLAY_OFF_MASK not asserted
    in SMU.

    [How]
    Optimized bandwidth should be called paired and to resolve unplug
    display underflow issue, optimize bandwidth after commit streams is
    moved to next page flip, in case of S0i3, there is a change for no
    flip coming causing display count is 1 in SMU side.
    Add optimize bandwidth after commit stream.

    Signed-off-by: Yongqiang Sun <yongqiang.sun at amd.com>
    Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
    Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

 drivers/gpu/drm/amd/display/dc/core/dc.c | 4 ++++
 1 file changed, 4 insertions(+)

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