1. 12 Jan, 2018 3 commits
  2. 11 Jan, 2018 4 commits
  3. 10 Jan, 2018 2 commits
  4. 09 Jan, 2018 2 commits
  5. 08 Jan, 2018 1 commit
    • Chris Wilson's avatar
      drm/i915: Don't adjust priority on an already signaled fence · c218ee03
      Chris Wilson authored
      When we retire a signaled fence, we free the dependency tree. However,
      we skip clearing the list so that if we then try to adjust the priority
      of the signaled fence, we may walk the list of freed dependencies.
      
      [ 3083.156757] ==================================================================
      [ 3083.156806] BUG: KASAN: use-after-free in execlists_schedule+0x199/0x660 [i915]
      [ 3083.156810] Read of size 8 at addr ffff8806bf20f400 by task Xorg/831
      
      [ 3083.156815] CPU: 0 PID: 831 Comm: Xorg Not tainted 4.15.0-rc6-no-psn+ #1
      [ 3083.156817] Hardware name: Notebook                         N24_25BU/N24_25BU, BIOS 5.12 02/17/2017
      [ 3083.156818] Call Trace:
      [ 3083.156823]  dump_stack+0x5c/0x7a
      [ 3083.156827]  print_address_description+0x6b/0x290
      [ 3083.156830]  kasan_report+0x28f/0x380
      [ 3083.156872]  ? execlists_schedule+0x199/0x660 [i915]
      [ 3083.156914]  execlists_schedule+0x199/0x660 [i915]
      [ 3083.156956]  ? intel_crtc_atomic_check+0x146/0x4e0 [i915]
      [ 3083.156997]  ? execlists_submit_request+0xe0/0xe0 [i915]
      [ 3083.157038]  ? i915_vma_misplaced.part.4+0x25/0xb0 [i915]
      [ 3083.157079]  ? __i915_vma_do_pin+0x7c8/0xc80 [i915]
      [ 3083.157121]  ? intel_atomic_state_alloc+0x44/0x60 [i915]
      [ 3083.157130]  ? drm_atomic_helper_page_flip+0x3e/0xb0 [drm_kms_helper]
      [ 3083.157145]  ? drm_mode_page_flip_ioctl+0x7d2/0x850 [drm]
      [ 3083.157159]  ? drm_ioctl_kernel+0xa7/0xf0 [drm]
      [ 3083.157172]  ? drm_ioctl+0x45b/0x560 [drm]
      [ 3083.157211]  i915_gem_object_wait_priority+0x14c/0x2c0 [i915]
      [ 3083.157251]  ? i915_gem_get_aperture_ioctl+0x150/0x150 [i915]
      [ 3083.157290]  ? i915_vma_pin_fence+0x1d8/0x320 [i915]
      [ 3083.157331]  ? intel_pin_and_fence_fb_obj+0x175/0x250 [i915]
      [ 3083.157372]  ? intel_rotation_info_size+0x60/0x60 [i915]
      [ 3083.157413]  ? intel_link_compute_m_n+0x80/0x80 [i915]
      [ 3083.157428]  ? drm_dev_printk+0x1b0/0x1b0 [drm]
      [ 3083.157443]  ? drm_dev_printk+0x1b0/0x1b0 [drm]
      [ 3083.157485]  intel_prepare_plane_fb+0x2f8/0x5a0 [i915]
      [ 3083.157527]  ? intel_crtc_get_vblank_counter+0x80/0x80 [i915]
      [ 3083.157536]  drm_atomic_helper_prepare_planes+0xa0/0x1c0 [drm_kms_helper]
      [ 3083.157587]  intel_atomic_commit+0x12e/0x4e0 [i915]
      [ 3083.157605]  drm_atomic_helper_page_flip+0xa2/0xb0 [drm_kms_helper]
      [ 3083.157621]  drm_mode_page_flip_ioctl+0x7d2/0x850 [drm]
      [ 3083.157638]  ? drm_mode_cursor2_ioctl+0x10/0x10 [drm]
      [ 3083.157652]  ? drm_lease_owner+0x1a/0x30 [drm]
      [ 3083.157668]  ? drm_mode_cursor2_ioctl+0x10/0x10 [drm]
      [ 3083.157681]  drm_ioctl_kernel+0xa7/0xf0 [drm]
      [ 3083.157696]  drm_ioctl+0x45b/0x560 [drm]
      [ 3083.157711]  ? drm_mode_cursor2_ioctl+0x10/0x10 [drm]
      [ 3083.157725]  ? drm_getstats+0x20/0x20 [drm]
      [ 3083.157729]  ? timerqueue_del+0x49/0x80
      [ 3083.157732]  ? __remove_hrtimer+0x62/0xb0
      [ 3083.157735]  ? hrtimer_try_to_cancel+0x173/0x210
      [ 3083.157738]  do_vfs_ioctl+0x13b/0x880
      [ 3083.157741]  ? ioctl_preallocate+0x140/0x140
      [ 3083.157744]  ? _raw_spin_unlock_irq+0xe/0x30
      [ 3083.157746]  ? do_setitimer+0x234/0x370
      [ 3083.157750]  ? SyS_setitimer+0x19e/0x1b0
      [ 3083.157752]  ? SyS_alarm+0x140/0x140
      [ 3083.157755]  ? __rcu_read_unlock+0x66/0x80
      [ 3083.157757]  ? __fget+0xc4/0x100
      [ 3083.157760]  SyS_ioctl+0x74/0x80
      [ 3083.157763]  entry_SYSCALL_64_fastpath+0x1a/0x7d
      [ 3083.157765] RIP: 0033:0x7f6135d0c6a7
      [ 3083.157767] RSP: 002b:00007fff01451888 EFLAGS: 00003246 ORIG_RAX: 0000000000000010
      [ 3083.157769] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f6135d0c6a7
      [ 3083.157771] RDX: 00007fff01451950 RSI: 00000000c01864b0 RDI: 000000000000000c
      [ 3083.157772] RBP: 00007f613076f600 R08: 0000000000000001 R09: 0000000000000000
      [ 3083.157773] R10: 0000000000000060 R11: 0000000000003246 R12: 0000000000000000
      [ 3083.157774] R13: 0000000000000060 R14: 000000000000001b R15: 0000000000000060
      
      [ 3083.157779] Allocated by task 831:
      [ 3083.157783]  kmem_cache_alloc+0xc0/0x200
      [ 3083.157822]  i915_gem_request_await_dma_fence+0x2c4/0x5d0 [i915]
      [ 3083.157861]  i915_gem_request_await_object+0x321/0x370 [i915]
      [ 3083.157900]  i915_gem_do_execbuffer+0x1165/0x19c0 [i915]
      [ 3083.157937]  i915_gem_execbuffer2+0x1ad/0x550 [i915]
      [ 3083.157950]  drm_ioctl_kernel+0xa7/0xf0 [drm]
      [ 3083.157962]  drm_ioctl+0x45b/0x560 [drm]
      [ 3083.157964]  do_vfs_ioctl+0x13b/0x880
      [ 3083.157966]  SyS_ioctl+0x74/0x80
      [ 3083.157968]  entry_SYSCALL_64_fastpath+0x1a/0x7d
      
      [ 3083.157971] Freed by task 831:
      [ 3083.157973]  kmem_cache_free+0x77/0x220
      [ 3083.158012]  i915_gem_request_retire+0x72c/0xa70 [i915]
      [ 3083.158051]  i915_gem_request_alloc+0x1e9/0x8b0 [i915]
      [ 3083.158089]  i915_gem_do_execbuffer+0xa96/0x19c0 [i915]
      [ 3083.158127]  i915_gem_execbuffer2+0x1ad/0x550 [i915]
      [ 3083.158140]  drm_ioctl_kernel+0xa7/0xf0 [drm]
      [ 3083.158153]  drm_ioctl+0x45b/0x560 [drm]
      [ 3083.158155]  do_vfs_ioctl+0x13b/0x880
      [ 3083.158156]  SyS_ioctl+0x74/0x80
      [ 3083.158158]  entry_SYSCALL_64_fastpath+0x1a/0x7d
      
      [ 3083.158162] The buggy address belongs to the object at ffff8806bf20f400
                      which belongs to the cache i915_dependency of size 64
      [ 3083.158166] The buggy address is located 0 bytes inside of
                      64-byte region [ffff8806bf20f400, ffff8806bf20f440)
      [ 3083.158168] The buggy address belongs to the page:
      [ 3083.158171] page:00000000d43decc4 count:1 mapcount:0 mapping:          (null) index:0x0
      [ 3083.158174] flags: 0x17ffe0000000100(slab)
      [ 3083.158179] raw: 017ffe0000000100 0000000000000000 0000000000000000 0000000180200020
      [ 3083.158182] raw: ffffea001afc16c0 0000000500000005 ffff880731b881c0 0000000000000000
      [ 3083.158184] page dumped because: kasan: bad access detected
      
      [ 3083.158187] Memory state around the buggy address:
      [ 3083.158190]  ffff8806bf20f300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
      [ 3083.158192]  ffff8806bf20f380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
      [ 3083.158195] >ffff8806bf20f400: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
      [ 3083.158196]                    ^
      [ 3083.158199]  ffff8806bf20f480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
      [ 3083.158201]  ffff8806bf20f500: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
      [ 3083.158203] ==================================================================
      Reported-by: default avatarAlexandru Chirvasitu <achirvasub@gmail.com>
      Reported-by: default avatarMike Keehan <mike@keehan.net>
      Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104436
      Fixes: 1f181225 ("drm/i915/execlists: Keep request->priority for its lifetime")
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: Alexandru Chirvasitu <achirvasub@gmail.com>
      Cc: Michał Winiarski <michal.winiarski@intel.com>
      Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
      Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
      Tested-by: default avatarAlexandru Chirvasitu <achirvasub@gmail.com>
      Reviewed-by: default avatarMichał Winiarski <michal.winiarski@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20180106105618.13532-1-chris@chris-wilson.co.uk
      c218ee03
  6. 05 Jan, 2018 2 commits
  7. 04 Jan, 2018 2 commits
  8. 03 Jan, 2018 11 commits
  9. 02 Jan, 2018 2 commits
  10. 28 Dec, 2017 2 commits
  11. 23 Dec, 2017 1 commit
    • Hans de Goede's avatar
      drm/i915/vlv: Add cdclk workaround for DSI · c8dae55a
      Hans de Goede authored
      At least on the Chuwi Vi8 (non pro/plus) the LCD panel will show an image
      shifted aprox. 20% to the left (with wraparound) and sometimes also wrong
      colors, showing that the panel controller is starting with sampling the
      datastream somewhere mid-line. This happens after the first blanking and
      re-init of the panel.
      
      After looking at drm.debug output I noticed that initially we inherit the
      cdclk of 333333 KHz set by the GOP, but after the re-init we picked 266667
      KHz, which turns out to be the cause of this problem, a quick hack to hard
      code the cdclk to 333333 KHz makes the problem go away.
      
      I've tested this on various Bay Trail devices, to make sure this not does
      cause regressions on other devices and the higher cdclk does not cause
      any problems on the following devices:
      -GP-electronic T701      1024x600   333333 KHz cdclk after this patch
      -PEAQ C1010              1920x1200  333333 KHz cdclk after this patch
      -PoV mobii-wintab-800w    800x1280  333333 KHz cdclk after this patch
      -Asus Transformer-T100TA 1368x768   320000 KHz cdclk after this patch
      
      Also interesting wrt this is the comment in vlv_calc_cdclk about the
      existing workaround to avoid 200 Mhz as clock because that causes issues
      in some cases.
      
      This commit extends the "do not use 200 Mhz" workaround with an extra
      check to require atleast 320000 KHz (avoiding 266667 KHz) when a DSI
      panel is active.
      
      Changes in v2:
      -Change the commit message and the code comment to not treat the GOP as
       a reference, the GOP should not be treated as a reference
      Acked-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
      Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20171220105017.11259-1-hdegoede@redhat.com
      c8dae55a
  12. 22 Dec, 2017 8 commits