Bug 61041

Summary: [Pineview]I-G-T/testdisplay && VGA 1600x1200 65Hz messing the screen
Product: DRI Reporter: yanbing <bingx.a.yan>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: bingx.a.yan, qingshuai.tian, yangweix.shui
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
mess-screen.dmesg
none
screen mess(VGA-1600x1200-65Hz) .jpg
none
Don't try to be smart about reg access
none
reg_dumper.log none

Description yanbing 2013-02-18 07:55:25 UTC 
Created attachment 75032 [details]
mess-screen.dmesg

Environment:
--------------------------
Kernel: (drm-intel-next-queued)1ca6bae2b153e5037a05685fb89852bcc9556afe
Some additional commit info:
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Fri Jan 18 19:11:38 2013 +0200

    drm/i915: Implement pipe CSC based limited range RGB output

Steps:
---------------------------

./testdisplay -o (the specific mode like below)

CRTS(3):[0]  1600x1200 65 1600 1664 1856 2160 1200 1201 1204 1250 0x5 0x40 175500


Result:
--------------------------
1.The screen is messing.
2.Just on pineview platform,other platforms normal.
3.The model of the monitor: HP 2309p , but other ones we had just don't contain this mode.
4.I attached the photo and dmesg.
Comment 1 yanbing 2013-02-18 07:57:35 UTC 
Created attachment 75033 [details]
screen mess(VGA-1600x1200-65Hz) .jpg
Comment 2 Daniel Vetter 2013-02-18 10:01:12 UTC 
Offhand I don't have any good idea what's going on here. I guess this is a regression?

If so, please attach the output of intel_reg_dumper from both a working and a broken kernel. Also please try to bisect this issue.
Comment 3 yanbing 2013-02-19 02:26:23 UTC 
(In reply to comment #2)
> Offhand I don't have any good idea what's going on here. I guess this is a
> regression?
> 
> If so, please attach the output of intel_reg_dumper from both a working and
> a broken kernel. Also please try to bisect this issue.

I'm afraid to say it's not a regression. I can't find any a good point,so I can't bisect this issue.
Comment 4 yanbing 2013-02-19 05:58:08 UTC 
1.I had try this on the other monitor:Dell U3011, the issue is also exist.

2.I had try using the intel_reg_dumper,but the output is below: 

Gen2/3 Ranges are not supported. Please use unsafe access.Aborted (core dumped)

So what is mean?
Comment 5 Ben Widawsky 2013-02-19 06:09:06 UTC 
Created attachment 75089 [details] [review]
Don't try to be smart about reg access

Please try this patch and run reg_dumper again
Comment 6 yanbing 2013-02-19 06:30:22 UTC 
(In reply to comment #5)
> Created attachment 75089 [details] [review] [review]
> Don't try to be smart about reg access
> 
> Please try this patch and run reg_dumper again

Thanks for this patch,so I attached the reg_dumper.log.
Comment 7 yanbing 2013-02-19 06:30:58 UTC 
Created attachment 75090 [details]
reg_dumper.log
Comment 8 Daniel Vetter 2013-11-18 17:46:46 UTC 
Presuming fixed on latest kernel versions, please reopen if this is still broken. Thanks.

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