Re: ✗ Fi.CI.BAT: failure for series starting with [1/3] drm/i915: Convert intel_hpd_irq_event() into an encoder hotplug hook

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On Mon, Jan 15, 2018 at 11:51:19AM -0000, Patchwork wrote:
> == Series Details ==
> 
> Series: series starting with [1/3] drm/i915: Convert intel_hpd_irq_event() into an encoder hotplug hook
> URL   : https://patchwork.freedesktop.org/series/36431/
> State : failure
> 
> == Summary ==
> 
> Series 36431v1 series starting with [1/3] drm/i915: Convert intel_hpd_irq_event() into an encoder hotplug hook
> https://patchwork.freedesktop.org/api/1.0/series/36431/revisions/1/mbox/
> 
> Test debugfs_test:
>         Subgroup read_all_entries:
>                 incomplete -> PASS       (fi-snb-2520m) fdo#103713
>                 pass       -> DMESG-WARN (fi-bdw-gvtdvm) fdo#103938 +1
> Test kms_cursor_legacy:
>         Subgroup basic-busy-flip-before-cursor-atomic:
>                 pass       -> FAIL       (fi-skl-6770hq)
>         Subgroup basic-busy-flip-before-cursor-legacy:
>                 pass       -> FAIL       (fi-skl-6770hq)
>         Subgroup basic-flip-after-cursor-atomic:
>                 pass       -> FAIL       (fi-skl-6770hq)
>         Subgroup basic-flip-after-cursor-legacy:
>                 pass       -> FAIL       (fi-skl-6770hq)
>         Subgroup basic-flip-after-cursor-varying-size:
>                 pass       -> FAIL       (fi-skl-6770hq)
>         Subgroup basic-flip-before-cursor-atomic:
>                 pass       -> FAIL       (fi-skl-6770hq)
>         Subgroup basic-flip-before-cursor-legacy:
>                 pass       -> FAIL       (fi-skl-6770hq)
>         Subgroup basic-flip-before-cursor-varying-size:
>                 pass       -> FAIL       (fi-skl-6770hq)

This is LSPCON being silly. It throws a short HPD during the enable
sequence before link training. The short hpd handler then thinks
the link has fallen over and schedules the hotplug work to retrain
the link. The hotplug work will wait for the modeset to finish and
won't actually retrain the link needlessly though.

But all this is apparently sufficient amount of extra work to
throw the test off.

Not quite sure what to do about this. The whole point here was to make
the short hpd handler not take the modeset locks, so we'd need some
other way to deal with the concurrent modeset. I guess I could just
add some kind of 'bool link_trained;' type of thing to intel_dp to go
alongside the link params we already store there. But I've been hoping
we could eliminate this extra state being tracked in intel_dp. But
I can immediately think of anything better that would avoid the modeset
locks in the short pulse handler.

> Test kms_pipe_crc_basic:
>         Subgroup suspend-read-crc-pipe-a:
>                 pass       -> DMESG-WARN (fi-kbl-r) fdo#104172
> 
> fdo#103713 https://bugs.freedesktop.org/show_bug.cgi?id=103713
> fdo#103938 https://bugs.freedesktop.org/show_bug.cgi?id=103938
> fdo#104172 https://bugs.freedesktop.org/show_bug.cgi?id=104172
> 
> fi-bdw-5557u     total:288  pass:267  dwarn:0   dfail:0   fail:0   skip:21  time:419s
> fi-bdw-gvtdvm    total:288  pass:262  dwarn:2   dfail:0   fail:0   skip:24  time:425s
> fi-blb-e6850     total:288  pass:223  dwarn:1   dfail:0   fail:0   skip:64  time:372s
> fi-bsw-n3050     total:288  pass:242  dwarn:0   dfail:0   fail:0   skip:46  time:490s
> fi-bwr-2160      total:288  pass:183  dwarn:0   dfail:0   fail:0   skip:105 time:279s
> fi-bxt-j4205     total:288  pass:259  dwarn:0   dfail:0   fail:0   skip:29  time:485s
> fi-byt-j1900     total:288  pass:253  dwarn:0   dfail:0   fail:0   skip:35  time:470s
> fi-byt-n2820     total:288  pass:249  dwarn:0   dfail:0   fail:0   skip:39  time:457s
> fi-cnl-y2        total:288  pass:261  dwarn:0   dfail:0   fail:0   skip:27  time:528s
> fi-elk-e7500     total:224  pass:168  dwarn:10  dfail:0   fail:0   skip:45 
> fi-gdg-551       total:288  pass:179  dwarn:0   dfail:0   fail:1   skip:108 time:277s
> fi-glk-1         total:288  pass:260  dwarn:0   dfail:0   fail:0   skip:28  time:512s
> fi-hsw-4770r     total:288  pass:261  dwarn:0   dfail:0   fail:0   skip:27  time:400s
> fi-ivb-3520m     total:288  pass:259  dwarn:0   dfail:0   fail:0   skip:29  time:462s
> fi-ivb-3770      total:288  pass:255  dwarn:0   dfail:0   fail:0   skip:33  time:410s
> fi-kbl-7500u     total:288  pass:263  dwarn:1   dfail:0   fail:0   skip:24  time:469s
> fi-kbl-7560u     total:288  pass:269  dwarn:0   dfail:0   fail:0   skip:19  time:500s
> fi-kbl-7567u     total:288  pass:268  dwarn:0   dfail:0   fail:0   skip:20  time:456s
> fi-kbl-r         total:288  pass:260  dwarn:1   dfail:0   fail:0   skip:27  time:509s
> fi-pnv-d510      total:288  pass:222  dwarn:1   dfail:0   fail:0   skip:65  time:576s
> fi-skl-6260u     total:288  pass:268  dwarn:0   dfail:0   fail:0   skip:20  time:429s
> fi-skl-6600u     total:288  pass:261  dwarn:0   dfail:0   fail:0   skip:27  time:516s
> fi-skl-6700hq    total:288  pass:262  dwarn:0   dfail:0   fail:0   skip:26  time:527s
> fi-skl-6700k2    total:288  pass:264  dwarn:0   dfail:0   fail:0   skip:24  time:491s
> fi-skl-6770hq    total:288  pass:260  dwarn:0   dfail:0   fail:8   skip:20  time:488s
> fi-snb-2520m     total:288  pass:248  dwarn:0   dfail:0   fail:0   skip:40  time:536s
> fi-snb-2600      total:288  pass:248  dwarn:0   dfail:0   fail:0   skip:40  time:399s
> Blacklisted hosts:
> fi-cfl-s2        total:288  pass:262  dwarn:0   dfail:0   fail:0   skip:26  time:574s
> fi-glk-dsi       total:288  pass:258  dwarn:0   dfail:0   fail:0   skip:30  time:469s
> 
> 254125b984264731491e1eafbe58bc50e84a032d drm-tip: 2018y-01m-15d-09h-31m-31s UTC integration manifest
> 40530efe1001 drm/i915: Move SST DP link retraining into the ->post_hotplug() hook
> 54738b5b5101 drm/i915: Reinitialize sink scrambling/TMDS clock ratio on HPD
> 523afd823a2c drm/i915: Convert intel_hpd_irq_event() into an encoder hotplug hook
> 
> == Logs ==
> 
> For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_7669/issues.html

-- 
Ville Syrjälä
Intel OTC
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