[Bug 81656] [BDW]Piglit spec_glsl-1.50_execution_geometry_max-input-components sporadically fail and causes WARNING drivers/gpu/drm/i915/intel_uncore.c:528 hsw_unclaimed_reg_debug.isra.11+0x6c/0x7e

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81656

lu hua <huax.lu at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |critical
           Priority|medium                      |high

--- Comment #1 from lu hua <huax.lu at intel.com> ---
Many Ogles2conform cases also have this issue.

run ./GTF -width=64 -height=64
-run=GL2ExtensionTests/compressed_etc1_rgb8_texture/compressed_etc1_rgb8_texture.test

dmesg:
[  107.805310] [drm:i915_gem_open]
[  107.820568] [drm:i915_gem_context_create_ioctl] HW context 1 created
[  107.830835] [drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.
[  107.839506] [drm:i915_gem_context_destroy_ioctl] HW context 1 destroyed
[  107.840891] [drm:i915_gem_context_create_ioctl] HW context 1 created
[  107.847169] [drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.
[  107.856098] [drm:i915_gem_context_destroy_ioctl] HW context 1 destroyed
[  107.857232] [drm:i915_gem_context_create_ioctl] HW context 1 created
[  107.863494] [drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.
[  107.872751] [drm:i915_gem_context_destroy_ioctl] HW context 1 destroyed
[  107.873865] [drm:i915_gem_context_create_ioctl] HW context 1 created
[  107.880113] [drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.
[  107.889379] [drm:i915_gem_context_destroy_ioctl] HW context 1 destroyed
[  107.890489] [drm:i915_gem_context_create_ioctl] HW context 1 created
[  107.896947] [drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.
[  107.906058] [drm:i915_gem_context_destroy_ioctl] HW context 1 destroyed
[  107.907174] [drm:i915_gem_context_create_ioctl] HW context 1 created
[  107.913490] [drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.
[  107.922731] [drm:i915_gem_context_destroy_ioctl] HW context 1 destroyed
[  108.022633] [drm:_edp_panel_vdd_on] Turning eDP VDD on
[  108.022644] [drm:_edp_panel_vdd_on] PP_STATUS: 0x80000008 PP_CONTROL:
0xabcd000f

dmesg(add i915.mmio_debug=1):
[   72.433632] [drm:i915_gem_open]
[   72.453475] [drm:i915_gem_context_create_ioctl] HW context 1 created
[   72.467791] ------------[ cut here ]------------
[   72.467832] WARNING: CPU: 0 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:528
hsw_unclaimed_reg_debug.isra.11+0x62/0x72 [i915]()
[   72.467836] Unclaimed register detected before reading register 0x44200
[   72.467838] Modules linked in: ip6table_filter ip6_tables ipv6
iptable_filter ip_tables ebtable_nat ebtables x_tables dm_mod
snd_hda_codec_hdmi iTCO_wdt iTCO_vendor_support ppdev pcspkr i2c_i801
snd_hda_intel snd_hda_controller snd_hda_codec lpc_ich snd_hwdep mfd_core
snd_pcm snd_timer snd soundcore battery parport_pc parport ac acpi_cpufreq i915
button video drm_kms_helper drm
[   72.467876] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
3.16.0-rc6_drm-intel-nightly_608e8c_20140729+ #896
[   72.467879]  0000000000000000 0000000000000009 ffffffff8178068d
ffff88014ec03dd8
[   72.467884]  ffffffff8103986c ffff880144440000 ffffffffa00a7434
00000000000000e0
[   72.467888]  ffff880002e50060 0000000000044200 ffff880002e50068
ffff880002e50060
[   72.467893] Call Trace:
[   72.467895]  <IRQ>  [<ffffffff8178068d>] ? dump_stack+0x41/0x51
[   72.467908]  [<ffffffff8103986c>] ? warn_slowpath_common+0x78/0x90
[   72.467928]  [<ffffffffa00a7434>] ?
hsw_unclaimed_reg_debug.isra.11+0x62/0x72 [i915]
[   72.467933]  [<ffffffff8103991c>] ? warn_slowpath_fmt+0x45/0x4a
[   72.467953]  [<ffffffffa00a7434>] ?
hsw_unclaimed_reg_debug.isra.11+0x62/0x72 [i915]
[   72.467969]  [<ffffffffa00a758c>] ? gen6_read32+0x47/0x101 [i915]
[   72.467988]  [<ffffffffa009c9fd>] ? gen8_irq_handler+0x2b/0x343 [i915]
[   72.467994]  [<ffffffff81043706>] ? get_next_timer_interrupt+0x199/0x211
[   72.467999]  [<ffffffff81074ed0>] ? handle_irq_event_percpu+0x4f/0x179
[   72.468004]  [<ffffffff81075028>] ? handle_irq_event+0x2e/0x4e
[   72.468009]  [<ffffffff8107746f>] ? handle_edge_irq+0xbb/0xde
[   72.468014]  [<ffffffff81004149>] ? handle_irq+0x15/0x20
[   72.468018]  [<ffffffff81003c00>] ? do_IRQ+0x43/0xc4
[   72.468023]  [<ffffffff81786caa>] ? common_interrupt+0x6a/0x6a
[   72.468025]  <EOI>  [<ffffffff81009e39>] ? default_idle+0x35/0x90
[   72.468035]  [<ffffffff81068ac5>] ? cpu_startup_entry+0x179/0x35c
[   72.468041]  [<ffffffff81c55df2>] ? start_kernel+0x3de/0x3e9
[   72.468045]  [<ffffffff81c5582b>] ? set_init_arg+0x50/0x50
[   72.468049] ---[ end trace a23feaff86a32745 ]---
[   72.470616] [drm:i915_gem_context_destroy_ioctl] HW context 1 destroyed
[   72.471954] [drm:i915_gem_context_create_ioctl] HW context 1 created

Increasing priority, It impacts so many cases.

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