[Bug 82892] [HSW/BDW]igt/kms_setmode/clone-exclusive-crtc causes "WARNING: CPU: 3 PID: 20000 at drivers/gpu/drm/i915/intel_ddi.c:1531 intel_ddi_compute_config+0x39/0x6c [i915]()"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82892

--- Comment #2 from Guo Jinxian <jinxianx.guo at intel.com> ---
This bug still able to reproduce on latest
-nightly(72faa6a63351879b381bd9e4013f38bc94f11999) on BDW

root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_setmode
--run-subtest clone-exclusive-crtc
IGT-Version: 1.8-g107151c (x86_64) (Linux:
3.17.0-rc4_drm-intel-nightly_72faa6_20140911+ x86_64)
Testing: clone-exclusive-crtc 2 connector combinations
  Test id#1 CRTC count 2
    CRTC[8] [Pipe A] Mode: 1920x1080 at 60Hz Connectors: eDP-1[19]
    CRTC[12] [Pipe B] Mode: 640x480 at 60Hz Connectors: HDMI-A-1[32] (NC)
Test assertion failure function test_crtc_config, file kms_setmode.c:431:
Failed assertion: config_failed == !!(tconf->flags & TEST_INVALID)
Last errno: 22, Invalid argument
Subtest clone-exclusive-crtc: FAIL (0.091s)
root at x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep
"<[1-4]>"|grep drm
<4>[   67.166670] WARNING: CPU: 0 PID: 4606 at
drivers/gpu/drm/i915/intel_ddi.c:1530 intel_ddi_compute_config+0x39/0x6c
[i915]()
<4>[   67.166672] Modules linked in: dm_mod snd_hda_codec_hdmi iTCO_wdt
iTCO_vendor_support ppdev pcspkr i2c_i801 snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm lpc_ich snd_timer mfd_core snd soundcore
battery parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm
cfbfillrect cfbimgblt cfbcopyarea
<4>[   67.166689] CPU: 0 PID: 4606 Comm: kms_setmode Not tainted
3.17.0-rc4_drm-intel-nightly_72faa6_20140911+ #2340
<4>[   67.166777]  [<ffffffffa0017fad>] ?
drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[   67.166784]  [<ffffffffa001b9a9>] ? drm_mode_setcrtc+0x3e6/0x48b [drm]
<4>[   67.166791]  [<ffffffffa001063c>] ? drm_ioctl+0x279/0x3bc [drm]
<4>[   67.166800]  [<ffffffffa001b5c3>] ? drm_mode_setplane+0x16d/0x16d [drm]
<4>[   67.166806]  [<ffffffffa000fad7>] ? drm_gem_vm_close+0x2a/0x4b [drm]
<4>[   67.166829] WARNING: CPU: 0 PID: 4606 at
drivers/gpu/drm/i915/intel_dp.c:137 intel_dp_max_link_bw+0x6e/0x75 [i915]()
<4>[   67.166831] Modules linked in: dm_mod snd_hda_codec_hdmi iTCO_wdt
iTCO_vendor_support ppdev pcspkr i2c_i801 snd_hda_intel snd_hda_controller
snd_hda_codec snd_hwdep snd_pcm lpc_ich snd_timer mfd_core snd soundcore
battery parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm
cfbfillrect cfbimgblt cfbcopyarea
<4>[   67.166845] CPU: 0 PID: 4606 Comm: kms_setmode Tainted: G        W     
3.17.0-rc4_drm-intel-nightly_72faa6_20140911+ #2340
<4>[   67.166933]  [<ffffffffa0017fad>] ?
drm_mode_set_config_internal+0x48/0xbd [drm]
<4>[   67.166940]  [<ffffffffa001b9a9>] ? drm_mode_setcrtc+0x3e6/0x48b [drm]
<4>[   67.166946]  [<ffffffffa001063c>] ? drm_ioctl+0x279/0x3bc [drm]
<4>[   67.166954]  [<ffffffffa001b5c3>] ? drm_mode_setplane+0x16d/0x16d [drm]
<4>[   67.166959]  [<ffffffffa000fad7>] ? drm_gem_vm_close+0x2a/0x4b [drm]

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