| Summary: | [BXT-P /APL] Corruption is seen on eDP with 2/3 pipes | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Product: | DRI | Reporter: | Humberto Israel Perez Rodriguez <humberto.i.perez.rodriguez> | ||||||
| Component: | DRM/Intel | Assignee: | Humberto Israel Perez Rodriguez <humberto.i.perez.rodriguez> | ||||||
| Status: | CLOSED FIXED | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||
| Severity: | normal | ||||||||
| Priority: | medium | CC: | intel-gfx-bugs | ||||||
| Version: | unspecified | ||||||||
| Hardware: | x86-64 (AMD64) | ||||||||
| OS: | Linux (All) | ||||||||
| Whiteboard: | |||||||||
| i915 platform: | BXT | i915 features: | display/eDP | ||||||
| Attachments: |
|
||||||||
|
Description
Humberto Israel Perez Rodriguez
2016-01-29 02:07:46 UTC
Bug scrub: ---------- Assigned to Jim Bride This issue can be observed with only HDMI and the latest configuration : --- Software information --- Kernel version 4.5.0-rc5-drm-intel-testing-ww10-commit-a27657a+ Linux distribution Ubuntu 15.10 Architecture 64-bit Mesa version 11.1.2 xf86-video-intel version 2.99.917 Xorg-Xserver version 1.18.1 DRM version 2.4.67 Cairo version 1.15.2 Kernel driver in use i915 Bios revision 123.16 KSC revision 1.6 --- Hardware information --- Platform BXT-P Motherboard model Broxton P Motherboard type NOTEBOOK Hand Held Motherboard manufacturer Intel Corp. CPU family Other CPU information 06/5c GPU Card Intel Corporation Device 5a84 (rev 03) (prog-if 00 [VGA controller]) Memory ram 8 GB Maximum memory ram allowed 16 GB Kernel : drm-intel-testing / commit = a27657a ================================================== commit a27657a39741599ce9feef1ef39ae6654e9e6768 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Mon Feb 29 09:42:22 2016 +0100 drm-intel-nightly: 2016y-02m-29d-08h-41m-12s UTC integration manifest [ 2767.011766] [drm:intel_update_cdclk] Current CD clock rate: 288000 kHz I wonder if we're running into the following (from the B-Spec SKL+ CDCLK_CTL register description): Do not use DisplayPort with CDCLK less than 432 MHz, audio enabled, port width x4, and link rate HBR2 (5.4 GHz), or else there may be audio corruption or screen corruption. (In reply to Jim Bride from comment #3) > [ 2767.011766] [drm:intel_update_cdclk] Current CD clock rate: 288000 kHz > > I wonder if we're running into the following (from the B-Spec SKL+ CDCLK_CTL > register description): > > Do not use DisplayPort with CDCLK less than 432 MHz, audio enabled, port > width x4, and link rate HBR2 (5.4 GHz), or else there may be audio > corruption or screen corruption. Additionally, it's worth noting that on BXT A the only operation external port, Port B (ddi0), has LSPCON in front of it and there is not currently support in the kernel to configure LSPCON. The CDCLK issue is still pertinent perhaps (likely, in fact) but any other behavior on Port B with BXT A is certainly suspect until we have LSPCON configuration support in the kernel. Could you try the following two patches: https://lists.freedesktop.org/archives/intel-gfx/2016-April/091296.html https://lists.freedesktop.org/archives/intel-gfx/2016-April/091309.html Assigned to Humberto to check the patches. Thanks (In reply to Imre Deak from comment #5) > Could you try the following two patches: > https://lists.freedesktop.org/archives/intel-gfx/2016-April/091296.html > https://lists.freedesktop.org/archives/intel-gfx/2016-April/091309.html this issue is gone with the patches , the flickering / corruption is not seen anymore with 2/3 pipes (edp + hdmi +dp ) kernel ================================================== commit ab13a48af1102b84bdb8dcdfbef1b5b44fab8d3d Author: Jani Nikula <jani.nikula@intel.com> Date: Wed Apr 6 14:24:06 2016 +0300 drm-intel-nightly: 2016y-04m-06d-11h-23m-30s UTC integration manifest Architecture: any all Version: 4.6.0-rc2 Homepage: http://www.kernel.org/ i have to comment that even with with DP 4K this patches works attachment ================= dmesg_patches.log Created attachment 122777 [details]
dmesg_patches.log
The fix is merged now, so closing this. |
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.