[Bug 93190] New: [BAT HSW] hsw-brixbox fails fdi link training

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93190

            Bug ID: 93190
           Summary: [BAT HSW] hsw-brixbox fails fdi link training
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: daniel at ffwll.ch
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Relevant snippet from dmesg:



[  134.706727] [drm:hsw_fdi_link_train [i915]] *ERROR* FDI link training
failed!
[  134.706905] ------------[ cut here ]------------
[  134.706916] WARNING: CPU: 0 PID: 5945 at
drivers/gpu/drm/i915/intel_display.c:1249 assert_fdi_rx+0x68/0xa0 [i915]()
[  134.706917] FDI RX state assertion failure (expected on, current off)
[  134.706918] Modules linked in: snd_hda_codec_hdmi x86_pkg_temp_thermal
intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul snd_hda_codec_realtek
snd_hda_codec_generic i915 snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core
i2c_hid mei_me snd_pcm mei i2c_designware_platform i2c_designware_core lpc_ich
r8169 mii sdhci_acpi sdhci mmc_core
[  134.706932] CPU: 0 PID: 5945 Comm: kms_flip Tainted: G     U  W      
4.4.0-rc2-gfxbench+ #1
[  134.706932] Hardware name: GIGABYTE M4HM87P-00/M4HM87P-00, BIOS F6
12/10/2014
[  134.706933]  ffffffffa02ac6d0 ffff880212d83ab0 ffffffff813df18c
ffff880212d83af8
[  134.706935]  ffff880212d83ae8 ffffffff810747b1 0000000000000001
ffff880210620000
[  134.706937]  ffff8800da5c4520 ffff880210364520 0000000000000000
ffff880212d83b48
[  134.706939] Call Trace:
[  134.706943]  [<ffffffff813df18c>] dump_stack+0x4e/0x82
[  134.706945]  [<ffffffff810747b1>] warn_slowpath_common+0x81/0xc0
[  134.706947]  [<ffffffff81074837>] warn_slowpath_fmt+0x47/0x50
[  134.706956]  [<ffffffffa022c0a8>] assert_fdi_rx+0x68/0xa0 [i915]
[  134.706966]  [<ffffffffa0243acb>] haswell_crtc_enable+0x67b/0x8b0 [i915]
[  134.706975]  [<ffffffffa023f075>] intel_atomic_commit+0x695/0x1810 [i915]
[  134.706977]  [<ffffffff8150d042>] ? drm_atomic_check_only+0x142/0x5e0
[  134.706979]  [<ffffffff8150c92b>] ?
drm_atomic_set_crtc_for_connector+0x1b/0x90
[  134.706980]  [<ffffffff8150d512>] drm_atomic_commit+0x32/0x50
[  134.706982]  [<ffffffff814ea305>] drm_atomic_helper_set_config+0x75/0xb0
[  134.706984]  [<ffffffff814fc110>] drm_mode_set_config_internal+0x60/0x110
[  134.706985]  [<ffffffff81500d26>] drm_mode_setcrtc+0x186/0x4e0
[  134.706987]  [<ffffffff814f306d>] drm_ioctl+0x13d/0x590
[  134.706988]  [<ffffffff81500ba0>] ? drm_mode_setplane+0x1b0/0x1b0
[  134.706990]  [<ffffffff811d4d9c>] do_vfs_ioctl+0x2fc/0x550
[  134.706992]  [<ffffffff8118d60a>] ? vm_munmap+0x4a/0x60
[  134.706993]  [<ffffffff811e080a>] ? __fget_light+0x6a/0x90
[  134.706995]  [<ffffffff811d502c>] SyS_ioctl+0x3c/0x70
[  134.706997]  [<ffffffff81797e1b>] entry_SYSCALL_64_fastpath+0x16/0x73
[  134.706998] ---[ end trace 08eedc206766a1be ]---
[  134.708255] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR*
uncleared pch fifo underrun on pch transcoder A
[  134.708268] [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH
transcoder A FIFO underrun

End result is that the pipe is dead, resulting in tons of testcases to fail. So
until this FDI issue is addressed there's probably no point in trying to look
at specific testcase results.

Testcases from the BAT run which seem to be affected by this are:

igt at kms_flip@basic-*
igt at kms_pipe_crc_basic@*

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