Bug 24548

Summary: S3 suspending supports for Ironlake graphics
Product: DRI Reporter: minskey <chaohong.guo>
Component: DRM/IntelAssignee: Wang Zhenyu <zhenyu.z.wang>
Status: CLOSED FIXED QA Contact:
Severity: major    
Priority: high Keywords: patch
Version: DRI git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Fix LVDS black screen issue after resuming from S3 none

Description minskey 2009-10-15 02:33:47 UTC 
Created attachment 30445 [details] [review]
Fix  LVDS black screen issue after resuming from S3

I get a system based Arrandale. With the following Zhenyu's 4 patches,  it can work but after resuming from S3,  LVDS has no outputs.

[PATCH 1/2] drm/i915: Fix FDI M/N setting according with correct color depth
[PATCH 2/2] drm/i915: disable powersave feature for Ironlake currently
[PATCH 3/3] drm/i915: fix to setup display reference clock control on Ironlake
[PATCH] drm/i915: Fix LVDS for Ironlake when assigned to pipe A,


I try to cook out a patch,  it works. See the attachment.
Comment 1 Wang Zhenyu 2009-11-05 22:14:21 UTC 
Patch is already in upstream linus kernel. Close.

commit 4204878179c99d419d392d78d817729992b4c442
Author: Zhenyu Wang <zhenyuw@linux.intel.com>
Date:   Wed Oct 21 15:27:01 2009 +0800

    drm/i915: Ironlake suspend/resume support
    
    This adds registers save/restore for Ironlake to make suspend work.
    
    Signed-off-by: Guo, Chaohong <chaohong.guo@intel.com>
    [zhenyuw: some code re-orgnization, and add more save/restore for
    FDI link and transcoder registers, also fix palette register for Ironlake]
    Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
    Signed-off-by: Eric Anholt <eric@anholt.net>

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