[Bug 98695] [byt bisected] WARN_ON(!power_domains->domain_use_count[domain])

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98695

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|WARNING: CPU: 0 PID: 123 at |[byt bisected]
                   |../drivers/gpu/drm/i915/int |WARN_ON(!power_domains->dom
                   |el_runtime_pm.c:1455        |ain_use_count[domain])
                   |intel_display_power_put+0x1 |
                   |3a/0x170 [i915]()           |

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit a781ce79d51fc4952870c998937980a042927e84
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Fri Nov 27 18:55:25 2015 +0200

    drm/i915: Clean up AUX power domain handling

    Introduce intel_display_port_aux_power_domain() which simply returns
    the appropriate AUX power domain for a specific port, and then replace
    the intel_display_port_power_domain() with calls to the new function
    in the DP code. As long as we're not actually enabling the port we don't
    need the lane power domains, and those are handled now purely from
    modeset_update_crtc_power_domains().

    My initial motivation for this was to see if I could keep the DPIO power
    wells powered down while doing AUX on CHV, but turns out I can't so this
    doesn't change anything for CHV at least. But I think it's still a
    worthwile change.

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