Created attachment 101559 [details] dmesg ==System Environment== -------------------------- Regression: Yes. I unable to find good commit Non-working platforms: BYT ==kernel== -------------------------- origin/drm-intel-nightly: 78f31a2d50183db12c0532eadcf486b9ebfa5f6d(fails) drm-intel-nightly: 2014y-06m-19d-21h-00m-17s integration manifest origin/drm-intel-next-queued: 9c33baa6b3bbb01c1a88dceba986b20e6642cf31(fails) drivers/i915: Fix unnoticed failure of init_ring_common() origin/drm-intel-fixes: 4a11e398b39b018c7aa3b22267cfdf3b7fae3625(fails) drm/i915: cache hw power well enabled state ==Bug detailed description== ----------------------------- Boot the device with DP monitor, the DP monitor was recognized as eDP. If boot the device then plug DP monitor, DP unable to be detected. Output: [root@x-byt05 tests]# ./testdisplay -i Connectors: id encoder status type size (mm) modes 25 24 connected eDP 510x290 11 modes: name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot flags type clock [0] 1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500 [1] 1280x1024 75 1280 1296 1440 1688 1024 1025 1028 1066 0x5 0x40 135000 [2] 1280x1024 60 1280 1328 1440 1688 1024 1025 1028 1066 0x5 0x40 108000 [3] 1152x864 75 1152 1216 1344 1600 864 865 868 900 0x5 0x40 108000 [4] 1024x768 75 1024 1040 1136 1312 768 769 772 800 0x5 0x40 78800 [5] 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000 [6] 800x600 75 800 816 896 1056 600 601 604 625 0x5 0x40 49500 [7] 800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000 [8] 640x480 75 640 656 720 840 480 481 484 500 0xa 0x40 31500 [9] 640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25200 [10] 720x400 70 720 738 846 900 400 412 414 449 0x6 0x40 28320 14 15 connected VGA 0x0 5 modes: name refresh (Hz) hdisp hss hse htot vdisp vss vse vtot flags type clock [0] 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000 [1] 800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000 [2] 800x600 56 800 824 896 1024 600 601 603 625 0x5 0x40 36000 [3] 848x480 60 848 864 976 1088 480 486 494 517 0x5 0x40 33750 [4] 640x480 60 640 656 752 800 480 489 492 525 0xa 0x40 25175 17 0 disconnected HDMI-A 520x290 0 21 0 disconnected DP 0x0 0 23 0 disconnected HDMI-A 0x0 0 CRTCs: id fb pos size 6 48 (0,0) (1920x1080) 1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500 11 48 (0,0) (1024x768) 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000 ==Reproduce steps== ---------------------------- 1. Boot the device with DP monitor 2. ./testdisplay -i
Sounds like a crap VBT. Please attach /sys/kernel/debug/dri/0/i915_opregion so we can verify.
Created attachment 101640 [details] i915_opregion (In reply to comment #1) > Sounds like a crap VBT. Please attach /sys/kernel/debug/dri/0/i915_opregion > so we can verify.
EFP device info: Device type: 0x1806 (unknown) Port: 0x08 (DP-C) That's eDP. So the VBT is wrong for your board. Is this some development board with reworks done to support DP on port C?
Marking as not our bug. Jinxian, please re-open if this happens with a production system. In that case, we may be mis-parsing or mis-interpreting the VBT yet again. Who would have thought a data structure could be so ambiguous.
Yes, it's development board with reworks done.
Closing old verified.
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