[Bug 91002] New: [BDW regression]Mplayer xv texture causes *ERROR* Unclaimed register detected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91002

            Bug ID: 91002
           Summary: [BDW regression]Mplayer xv texture causes *ERROR*
                    Unclaimed register detected
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: yex.tian at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: christophe.prigent at intel.com,
                    intel-gfx-bugs at lists.freedesktop.org

Created attachment 116546
  --> https://bugs.freedesktop.org/attachment.cgi?id=116546&action=edit
dmesg info on stable v4.0.4

==System Environment==       
-----------------------------------------------------
Regression: Yes
Non-working platforms: BDW

==Kernel==
--------------------------------------------------
Kernel:  stable v4.0.4
kernel:  drm-intel-fixes_245ec9
commit 245ec9d85696c3e539b23e210f248698b478379c
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Mon Jun 15 12:59:37 2015 +0300

    Revert "drm/i915: Don't skip request retirement if the active list is
empty"

    This reverts commit 0aedb1626566efd72b369c01992ee7413c82a0c5.

==Bug detailed description==
--------------------------------------------------
Mplayer xv texture causes *ERROR* Unclaimed register detected on stable v4.0.4
kernel, It does not exists on the latest drm-intel-nightly branch kernel. It
causes Call trace on latest drm-intel-fixes branch kernel.

Stable v4.0.4 output info: 
[drm:hsw_unclaimed_reg_detect.isra.8 [i915]] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this
problem.[drm:hsw_unclaimed_reg_detect.isra.8 [i915]] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.

Latest fixes kernel output info:
---------------------------------------------------------
[  269.056863] ------------[ cut here ]------------
[  269.056898] WARNING: CPU: 0 PID: 0 at
drivers/gpu/drm/i915/intel_uncore.c:566
hsw_unclaimed_reg_debug.isra.8+0x62/0x78 [i915]()
[  269.056900] Unclaimed register detected before reading register 0x44200
[  269.056901] Modules linked in: dm_mod iTCO_wdt iTCO_vendor_support ppdev
snd_hda_codec_hdmi pcspkr snd_hda_intel snd_hda_controller snd_hda_codec
i2c_i801 snd_hda_core snd_hwdep snd_pcm lpc_ich mfd_core snd_timer snd
soundcore battery parport_pc parport ac acpi_cpufreq joydev i915 button video
drm_kms_helper drm
[  269.056915] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
4.1.0-rc8_drm-intel-fixes_245ec9_20150616+ #1504
[  269.056917]  0000000000000000 0000000000000009 ffffffff817a74cc
ffff88014ec03dc8
[  269.056920]  ffffffff8103ebde ffff88014a004960 ffffffffa00bddfe
ffff88014a004980
[  269.056922]  ffff8801445b0068 0000000000044200 ffff8801445b0070
ffff8801445b0068
[  269.056924] Call Trace:
[  269.056925]  <IRQ>  [<ffffffff817a74cc>] ? dump_stack+0x40/0x50
[  269.056932]  [<ffffffff8103ebde>] ? warn_slowpath_common+0x98/0xb0
[  269.056945]  [<ffffffffa00bddfe>] ? hsw_unclaimed_reg_debug.isra.8+0x62/0x78
[i915]
[  269.056947]  [<ffffffff8103ec3b>] ? warn_slowpath_fmt+0x45/0x4a
[  269.056950]  [<ffffffff8106005f>] ? select_task_rq_fair+0x231/0x59d
[  269.056962]  [<ffffffffa00bddfe>] ? hsw_unclaimed_reg_debug.isra.8+0x62/0x78
[i915]
[  269.056972]  [<ffffffffa00bdfbf>] ? gen6_read32+0x49/0x163 [i915]
[  269.056985]  [<ffffffffa00ac286>] ? gen8_irq_handler+0x4b/0x345 [i915]
[  269.056988]  [<ffffffff81075e94>] ? handle_irq_event_percpu+0x34/0x15b
[  269.056991]  [<ffffffff810862c3>] ? update_wall_time+0x52b/0x544
[  269.056993]  [<ffffffff81075fe9>] ? handle_irq_event+0x2e/0x4d
[  269.056995]  [<ffffffff81078648>] ? handle_edge_irq+0xba/0xcf
[  269.056998]  [<ffffffff810041b5>] ? handle_irq+0x15/0x20
[  269.057000]  [<ffffffff81003c78>] ? do_IRQ+0x41/0xc0
[  269.057002]  [<ffffffff817adaeb>] ? common_interrupt+0x6b/0x6b
[  269.057003]  <EOI>  [<ffffffff816be8a9>] ? cpuidle_enter_state+0xd4/0x188
[  269.057009]  [<ffffffff816be855>] ? cpuidle_enter_state+0x80/0x188
[  269.057011]  [<ffffffff81069588>] ? cpu_startup_entry+0x204/0x31c
[  269.057014]  [<ffffffff81c99e1c>] ? start_kernel+0x413/0x41e
[  269.057017]  [<ffffffff81c99813>] ? set_init_arg+0x4e/0x4e
[  269.057019] ---[ end trace 108f4de1dece6be6 ]---



==Reproduce steps==
----------------------------
1, xinit&
2, mplayer -vo xv:adaptor=0  xxx

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