[Openchrome-devel] [Bug 93245] New: [Patch] ViaLVDSDFPPower function improvement

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Dec 3 23:22:25 PST 2015


https://bugs.freedesktop.org/show_bug.cgi?id=93245

            Bug ID: 93245
           Summary: [Patch] ViaLVDSDFPPower function improvement
           Product: xorg
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: enhancement
          Priority: medium
         Component: Driver/openchrome
          Assignee: openchrome-devel at lists.freedesktop.org
          Reporter: kevinbrace at gmx.com

Created attachment 120330
  --> https://bugs.freedesktop.org/attachment.cgi?id=120330&action=edit
[Patch] ViaLVDSDFPPower function improvement

Made improvements to ViaLVDSDFPPower function inside via_lvds.c.
A very poor assumption was being made regarding the I/O pad state of pins
connected to an LVDS-based DFP (Digital Flat Panel) in the previous version of
the code.
At this point, the best solution is to turn on or off the pins of both LVDS
Channel 1 and Channel 2.
The previous version of the code was relying on the supposed previous state of
pins connected to the LVDS-based DFP, and this was leading to the LVDS-based
DFP screen getting turned off completely when the computer resumes from ACPI S3
State.
In the future, it will be nice if LVDS Channel 1 or Channel 2 pins can be
turned on and off independently based on what is actually connected to the LVDS
channel.

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