[Bug 73252] New: [Baytrail-M] brightness can't be adjusted

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73252

          Priority: medium
            Bug ID: 73252
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [Baytrail-M] brightness can't be adjusted
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: evawang at linpus.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

brightness can't be adjusted on Baytrail-M.

We will call ACPI _BCM method to notify BIOS and BIOS generate ASLE interrupt
to VGA　controller offset 0xE4. but there is no method to receive and handle
this interrupt in i915. this only happens on Baytrail-M platform. please help
to check. Thanks!

kernel: 3.13-RC6

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