Created attachment 106478 [details] dmesg ==System Environment== -------------------------- Regression: Yes. Good commit on -fixes: e76c8c5979021483a3a6b480cfe360c644a403c0 Non-working platforms: BDW ==kernel== -------------------------- origin/drm-intel-nightly:3e5e5913a80f593aa8f67784220eac2658034c6c(fails) drm-intel-nightly: 2014y-09m-17d-16h-09m-44s UTC integration manifest origin/drm-intel-next-queued:de6a03dbc12c72e8ddd936071936fe96633c9d05(works) drm/i915: Clarify mmio_flip_lock locking origin/drm-intel-fixes: d72985765e986f45a28f87d75f3f0ece489b04cc(fails) drm/i915: Add limited color range readout for HDMI/DP ports on g4x/vlv/chv ==Bug detailed description== ----------------------------- igt/pm_rpm some subcases causes "WARNING: CPU: 0 PID: 4556 at drivers/gpu/drm/i915/intel_uncore.c:47 gen6_read32+0x26/0x101 [i915]()" Case list: igt/pm_rpm/dpms-lpsp igt/pm_rpm/dpms-mode-unset-lpsp igt/pm_rpm/drm-resources-equal igt/pm_rpm/fences igt/pm_rpm/gem-execbuf igt/pm_rpm/gem-mmap-cpu igt/pm_rpm/gem-mmap-gtt igt/pm_rpm/gem-pread igt/pm_rpm/i2c igt/pm_rpm/modeset-lpsp igt/pm_rpm/modeset-lpsp-stress igt/pm_rpm/pci-d3-state igt/pm_rpm/rte Output: root@x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./pm_rpm --run-subtest dpms-lpsp IGT-Version: 1.8-g1244fc6 (x86_64) (Linux: 3.17.0-rc5_drm-intel-nightly_3e5e59_20140918+ x86_64) Runtime PM support: 1 PC8 residency support: 1 Subtest dpms-lpsp: SUCCESS (1.386s) root@x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep ""<[1-4]>""|grep drm <4>[ 43.190160] WARNING: CPU: 0 PID: 4556 at drivers/gpu/drm/i915/intel_uncore.c:47 gen6_read32+0x26/0x101 [i915]() <4>[ 43.190162] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev snd_hda_codec_hdmi pcspkr i2c_i801 snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep lpc_ich snd_pcm mfd_core snd_timer snd soundcore battery parport_pc parport ac acpi_cpufreq i915 button video drm_kms_helper drm cfbfillrect cfbimgblt cfbcopyarea <4>[ 43.190179] CPU: 0 PID: 4556 Comm: pm_rpm Not tainted 3.17.0-rc5_drm-intel-nightly_3e5e59_20140918+ #2584 <4>[ 43.190287] [<ffffffffa0017fe5>] ? drm_mode_set_config_internal+0x48/0xbd [drm] <4>[ 43.190294] [<ffffffffa001ba0e>] ? drm_mode_setcrtc+0x3e6/0x48b [drm] <4>[ 43.190301] [<ffffffffa001074c>] ? drm_ioctl+0x279/0x3bc [drm] <4>[ 43.190312] [<ffffffffa001b628>] ? drm_mode_setplane+0x1ce/0x1ce [drm] ==Reproduce steps== ---------------------------- 1. ./pm_rpm --run-subtest dpms-lpsp
This bug was caused by "drm/i915: Don't enable IPS when pixel rate exceeds 95% of cdclk" which was on -fixes. Jani removed the patch from -fixes, so the bug should be gone. Please reopen if it still happens.
Verified on latest -nightly(3d788a0e87efd99553d5b00a70ab2a162c2c2283) root@x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./pm_rpm --run-subtest dpms-lpsp IGT-Version: 1.8-g5053446 (x86_64) (Linux: 3.17.0-rc5_drm-intel-nightly_3d788a_20140919+ x86_64) Runtime PM support: 1 PC8 residency support: 1 Subtest dpms-lpsp: SUCCESS (1.385s) root@x-bdw05:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r|egrep "<[1-4]>"|grep drm
Closing old verified.
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