| Summary: | [Baytrail-M] eDP and VGA can't light up simultaneously | ||||||
|---|---|---|---|---|---|---|---|
| Product: | DRI | Reporter: | kobeqin <kobe.qin> | ||||
| Component: | DRM/Intel | Assignee: | Jesse Barnes <jbarnes> | ||||
| Status: | CLOSED FIXED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||
| Severity: | critical | ||||||
| Priority: | high | CC: | cancan.feng, guang.a.yang, james.ausmus, kobe.qin, yangweix.shui | ||||
| Version: | unspecified | ||||||
| Hardware: | Other | ||||||
| OS: | Linux (All) | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
| Attachments: |
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Description
kobeqin
2013-08-04 05:59:08 UTC
And just before we had VGA hotplugging doesn't work... This requires a drm.debug=6 dmesg. Jesse is the Batrail owner. Created attachment 83653 [details]
dmesg for eDP and VGA can't light up simultaneously
We try to start X, but eDP still can't light up.
We test 2 scenario, First, 1. Hotplug VGA to system 2. Power ON Result: eDP can't light up Second, 1. Power ON(eDP can light up at this time) 2. Enter to OS 3. Hotplug VGA to system Result: eDP and VGA can light up at the same time At a high level we are happy, the modeset completed without any errors. So we aren't setting up the display arbitration correctly somewhere... Does this still occur now that Jani's patch for handling the pipe B panel power sequencer has landed? (In reply to comment #6) > Does this still occur now that Jani's patch for handling the pipe B panel > power sequencer has landed? We may also need per pipe backlight handling. Which will be a larger PITA than per pipe power sequencing. We tested it with latest -nightly kernel, but the issue is still exists like what Kobe described. If you do: intel_reg_write 0x1e1254 0x11551155 as root when this occurs, does the eDP panel light up? (In reply to comment #9) > If you do: > intel_reg_write 0x1e1254 0x11551155 > > as root when this occurs, does the eDP panel light up? eDP panel really lighted up after I executed "intel_reg_write 0x1e1254 0x11551155". And how about this patch? http://lists.freedesktop.org/archives/intel-gfx/2013-September/033913.html I will take short vacation from Sep.26th to Sep.30th. And have Chinese National Day from Oct.1st to Oct.7th. No email access during my short vacation and slow email response during Chinese National Day. If any urgent case, please contact my manager(Yu, Jerry), thanks a lot. (In reply to comment #11) > And how about this patch? > > http://lists.freedesktop.org/archives/intel-gfx/2013-September/033913.html OK, this patch worked, eDP and VGA can light up simultaneously now. commit f8abb0d1bb5240164687df528c5e590cbf072e3e Author: Jesse Barnes <jbarnes@virtuousgeek.org> Date: Wed Sep 25 14:04:32 2013 -0700 drm/i915/vlv: hack to init backlight regs if BIOS fails to do so v2 (In reply to comment #14) > commit f8abb0d1bb5240164687df528c5e590cbf072e3e > Author: Jesse Barnes <jbarnes@virtuousgeek.org> > Date: Wed Sep 25 14:04:32 2013 -0700 > > drm/i915/vlv: hack to init backlight regs if BIOS fails to do so v2 This commit worked, verified here. Closing old verified. |
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