1. 11 Mar, 2020 11 commits
  2. 10 Mar, 2020 10 commits
    • Chris Wilson's avatar
      drm/i915/execlists: Mark up data-races in virtual engines · 3a55dc89
      Chris Wilson authored
      The virtual engine passes tokens back and forth to its backing physical
      engines.
      
      [   57.372993] BUG: KCSAN: data-race in execlists_dequeue [i915] / virtual_submission_tasklet [i915]
      [   57.373012]
      [   57.373023] write to 0xffff8881f47324c0 of 4 bytes by interrupt on cpu 2:
      [   57.373241]  execlists_dequeue+0x6fa/0x2150 [i915]
      [   57.373458]  __execlists_submission_tasklet+0x48/0x60 [i915]
      [   57.373677]  execlists_submission_tasklet+0xd3/0x170 [i915]
      [   57.373694]  tasklet_action_common.isra.0+0x42/0xa0
      [   57.373709]  __do_softirq+0xd7/0x2cd
      [   57.373723]  irq_exit+0xbe/0xe0
      [   57.373735]  do_IRQ+0x51/0x100
      [   57.373748]  ret_from_intr+0x0/0x1c
      [   57.373963]  engine_retire+0x89/0xe0 [i915]
      [   57.373977]  process_one_work+0x3b1/0x690
      [   57.373990]  worker_thread+0x80/0x670
      [   57.374004]  kthread+0x19a/0x1e0
      [   57.374017]  ret_from_fork+0x1f/0x30
      [   57.374027]
      [   57.374038] read to 0xffff8881f47324c0 of 4 bytes by interrupt on cpu 3:
      [   57.374256]  virtual_submission_tasklet+0x27/0x5a0 [i915]
      [   57.374273]  tasklet_action_common.isra.0+0x42/0xa0
      [   57.374288]  __do_softirq+0xd7/0x2cd
      [   57.374302]  run_ksoftirqd+0x15/0x20
      [   57.374315]  smpboot_thread_fn+0x1ab/0x300
      [   57.374329]  kthread+0x19a/0x1e0
      [   57.374342]  ret_from_fork+0x1f/0x30
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200310141320.24149-3-chris@chris-wilson.co.uk
      3a55dc89
    • Chris Wilson's avatar
      drm/i915: Mark up racy read of active rq->engine · 326611dd
      Chris Wilson authored
      As a virtual engine may change the rq->engine to point to the active
      request in flight, we need to warn the compiler that an active request's
      engine is volatile.
      
      [   95.017686] write (marked) to 0xffff8881e8386b10 of 8 bytes by interrupt on cpu 2:
      [   95.018123]  execlists_dequeue+0x762/0x2150 [i915]
      [   95.018539]  __execlists_submission_tasklet+0x48/0x60 [i915]
      [   95.018955]  execlists_submission_tasklet+0xd3/0x170 [i915]
      [   95.018986]  tasklet_action_common.isra.0+0x42/0xa0
      [   95.019016]  __do_softirq+0xd7/0x2cd
      [   95.019043]  irq_exit+0xbe/0xe0
      [   95.019068]  irq_work_interrupt+0xf/0x20
      [   95.019491]  i915_request_retire+0x2c5/0x670 [i915]
      [   95.019937]  retire_requests+0xa1/0xf0 [i915]
      [   95.020348]  engine_retire+0xa1/0xe0 [i915]
      [   95.020376]  process_one_work+0x3b1/0x690
      [   95.020403]  worker_thread+0x80/0x670
      [   95.020429]  kthread+0x19a/0x1e0
      [   95.020454]  ret_from_fork+0x1f/0x30
      [   95.020476]
      [   95.020498] read to 0xffff8881e8386b10 of 8 bytes by task 8909 on cpu 3:
      [   95.020918]  __i915_request_commit+0x177/0x220 [i915]
      [   95.021329]  i915_gem_do_execbuffer+0x38c4/0x4e50 [i915]
      [   95.021750]  i915_gem_execbuffer2_ioctl+0x2c3/0x580 [i915]
      [   95.021784]  drm_ioctl_kernel+0xe4/0x120
      [   95.021809]  drm_ioctl+0x297/0x4c7
      [   95.021832]  ksys_ioctl+0x89/0xb0
      [   95.021865]  __x64_sys_ioctl+0x42/0x60
      [   95.021901]  do_syscall_64+0x6e/0x2c0
      [   95.021927]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200310142403.5953-1-chris@chris-wilson.co.uk
      326611dd
    • Chris Wilson's avatar
      drm/i915/gt: Mark up racy reads for intel_context.inflight · 0690e504
      Chris Wilson authored
      When being used across multiple real engines inside a virtual engine,
      the intel_context.inflight is updated atomically, and so we must
      annotate the racy read from outside the owning context.
      
      [11142.482846] BUG: KCSAN: data-race in __execlists_submission_tasklet [i915] / __execlists_submission_tasklet [i915]
      [11142.482867]
      [11142.482878] write (marked) to 0xffff8881f257b5e0 of 8 bytes by interrupt on cpu 2:
      [11142.483107]  __execlists_submission_tasklet+0x1d33/0x2120 [i915]
      [11142.483336]  execlists_submission_tasklet+0xd3/0x170 [i915]
      [11142.483355]  tasklet_action_common.isra.0+0x42/0xa0
      [11142.483371]  __do_softirq+0xd7/0x2cd
      [11142.483384]  irq_exit+0xbe/0xe0
      [11142.483401]  do_IRQ+0x51/0x100
      [11142.483424]  ret_from_intr+0x0/0x1c
      [11142.483446]  do_idle+0x133/0x1f0
      [11142.483465]  cpu_startup_entry+0x14/0x16
      [11142.483483]  start_secondary+0x120/0x180
      [11142.483498]  secondary_startup_64+0xa4/0xb0
      [11142.483512]
      [11142.483528] read to 0xffff8881f257b5e0 of 8 bytes by interrupt on cpu 1:
      [11142.483755]  __execlists_submission_tasklet+0x14e/0x2120 [i915]
      [11142.483981]  execlists_submission_tasklet+0xd3/0x170 [i915]
      [11142.483999]  tasklet_action_common.isra.0+0x42/0xa0
      [11142.484014]  __do_softirq+0xd7/0x2cd
      [11142.484028]  do_softirq_own_stack+0x2a/0x40
      [11142.484046]  do_softirq.part.0+0x26/0x30
      [11142.484071]  __local_bh_enable_ip+0x46/0x50
      [11142.484299]  i915_gem_do_execbuffer+0x39c1/0x4e50 [i915]
      [11142.484528]  i915_gem_execbuffer2_ioctl+0x2c3/0x580 [i915]
      [11142.484546]  drm_ioctl_kernel+0xe4/0x120
      [11142.484559]  drm_ioctl+0x297/0x4c7
      [11142.484572]  ksys_ioctl+0x89/0xb0
      [11142.484586]  __x64_sys_ioctl+0x42/0x60
      [11142.484610]  do_syscall_64+0x6e/0x2c0
      [11142.484627]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200310141320.24149-1-chris@chris-wilson.co.uk
      0690e504
    • Chris Wilson's avatar
      drm/i915: Tweak scheduler's kick_submission() · 6cebcf74
      Chris Wilson authored
      Skip useless priority bumping on adding a new dependency by making sure
      that we do update the priority if we would have rescheduled the active
      cotnext.
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200310115947.6482-1-chris@chris-wilson.co.uk
      6cebcf74
    • Chris Wilson's avatar
      drm/i915: Defer semaphore priority bumping to a workqueue · 209df10b
      Chris Wilson authored
      Since the semaphore fence may be signaled from inside an interrupt
      handler from inside a request holding its request->lock, we cannot then
      enter into the engine->active.lock for processing the semaphore priority
      bump as we may traverse our call tree and end up on another held
      request.
      
      CPU 0:
      [ 2243.218864]  _raw_spin_lock_irqsave+0x9a/0xb0
      [ 2243.218867]  i915_schedule_bump_priority+0x49/0x80 [i915]
      [ 2243.218869]  semaphore_notify+0x6d/0x98 [i915]
      [ 2243.218871]  __i915_sw_fence_complete+0x61/0x420 [i915]
      [ 2243.218874]  ? kmem_cache_free+0x211/0x290
      [ 2243.218876]  i915_sw_fence_complete+0x58/0x80 [i915]
      [ 2243.218879]  dma_i915_sw_fence_wake+0x3e/0x80 [i915]
      [ 2243.218881]  signal_irq_work+0x571/0x690 [i915]
      [ 2243.218883]  irq_work_run_list+0xd7/0x120
      [ 2243.218885]  irq_work_run+0x1d/0x50
      [ 2243.218887]  smp_irq_work_interrupt+0x21/0x30
      [ 2243.218889]  irq_work_interrupt+0xf/0x20
      
      CPU 1:
      [ 2242.173107]  _raw_spin_lock+0x8f/0xa0
      [ 2242.173110]  __i915_request_submit+0x64/0x4a0 [i915]
      [ 2242.173112]  __execlists_submission_tasklet+0x8ee/0x2120 [i915]
      [ 2242.173114]  ? i915_sched_lookup_priolist+0x1e3/0x2b0 [i915]
      [ 2242.173117]  execlists_submit_request+0x2e8/0x2f0 [i915]
      [ 2242.173119]  submit_notify+0x8f/0xc0 [i915]
      [ 2242.173121]  __i915_sw_fence_complete+0x61/0x420 [i915]
      [ 2242.173124]  ? _raw_spin_unlock_irqrestore+0x39/0x40
      [ 2242.173137]  i915_sw_fence_complete+0x58/0x80 [i915]
      [ 2242.173140]  i915_sw_fence_commit+0x16/0x20 [i915]
      
      Closes: https://gitlab.freedesktop.org/drm/intel/issues/1318
      Fixes: b7404c7e ("drm/i915: Bump ready tasks ahead of busywaits")
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
      Cc: <stable@vger.kernel.org> # v5.2+
      Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200310101720.9944-1-chris@chris-wilson.co.uk
      209df10b
    • Rodrigo Vivi's avatar
      Merge tag 'gvt-next-2020-03-10' of https://github.com/intel/gvt-linux into drm-intel-next-queued · 75e675f8
      Rodrigo Vivi authored
      gvt-next-2020-03-10
      
      - Fix CFL dmabuf display after vfio edid enabling (Tina)
      - Clean up scan non-priv batch debugfs entry (Chris)
      - Use intel engines initialized in gvt, cleanup previous ring id (Chris)
      - Use intel_gt instead (Chris)
      Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
      From: Zhenyu Wang <zhenyuw@linux.intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200310081928.GG28483@zhen-hp.sh.intel.com
      75e675f8
    • Radhakrishna Sripada's avatar
      drm/i915/display: Do not write in removed FBC fence registers · 765e7cd9
      Radhakrishna Sripada authored
      Platforms without fences don't have FBC host tracking and those
      registers are marked as reserved in those platforms.
      
      v2: checking num_fences to write to FBC fence registers (Ville)
      
      Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
      Cc: Matt Roper <matthew.d.roper@intel.com>
      Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
      Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
      Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
      Signed-off-by: default avatarRadhakrishna Sripada <radhakrishna.sripada@intel.com>
      Signed-off-by: default avatarLucas De Marchi <lucas.demarchi@intel.com>
      Signed-off-by: default avatarJosé Roberto de Souza <jose.souza@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200306185833.53984-2-jose.souza@intel.com
      765e7cd9
    • José Roberto de Souza's avatar
      drm/i915/display: Deactive FBC in fastsets when disabled by parameter · dff8ba1c
      José Roberto de Souza authored
      Most of the kms_frontbuffer_tracking tests disables the feature being
      tested, draw, get the CRC then enable the feature, draw again, get the
      CRC and check if it matches.
      Some times it is able to do that with a fastset, so
      intel_pre_plane_update() is executed but intel_fbc_can_flip_nuke() was
      not checking if FBC is now enabled in this CRTC leaving FBC active and
      causing the warning bellow in __intel_fbc_disable()
      
      [IGT] kms_frontbuffer_tracking: starting subtest fbc-1p-pri-indfb-multidraw
      Setting dangerous option enable_fbc - tainting kernel
      i915 0000:00:02.0: [drm:i915_edp_psr_debug_set [i915]] Setting PSR debug to f
      i915 0000:00:02.0: [drm:intel_psr_debug_set [i915]] Invalid debug mask f
      i915 0000:00:02.0: [drm:i915_edp_psr_debug_set [i915]] Setting PSR debug to 1
      i915 0000:00:02.0: [drm:intel_atomic_check [i915]] [CONNECTOR:215:eDP-1] Limiting display bpp to 24 instead of EDID bpp 24, requested bpp 36, max platform bpp 36
      [drm:intel_dp_compute_config [i915]] DP link computation with max lane count 2 max rate 270000 max bpp 24 pixel clock 138120KHz
      [drm:intel_dp_compute_config [i915]] Force DSC en = 0
      [drm:intel_dp_compute_config [i915]] DP lane count 2 clock 270000 bpp 24
      [drm:intel_dp_compute_config [i915]] DP link rate required 414360 available 540000
      i915 0000:00:02.0: [drm:intel_atomic_check [i915]] hw max bpp: 24, pipe bpp: 24, dithering: 0
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] [CRTC:91:pipe A] enable: yes [fastset]
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] active: yes, output_types: EDP (0x100), output format: RGB
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] cpu_transcoder: EDP, pipe bpp: 24, dithering: 0
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] dp m_n: lanes: 2; gmch_m: 6436858, gmch_n: 8388608, link_m: 268202, link_n: 524288, tu: 64
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] audio: 0, infoframes: 0, infoframes enabled: 0x0
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] requested mode:
      [drm:drm_mode_debug_printmodeline] Modeline "1920x1080": 60 138120 1920 1968 2018 2052 1080 1084 1086 1122 0x48 0xa
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] adjusted mode:
      [drm:drm_mode_debug_printmodeline] Modeline "1920x1080": 60 138120 1920 1968 2018 2052 1080 1084 1086 1122 0x48 0xa
      [drm:intel_dump_pipe_config [i915]] crtc timings: 138120 1920 1968 2018 2052 1080 1084 1086 1122, type: 0x48 flags: 0xa
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] port clock: 270000, pipe src size: 1920x1080, pixel rate 138120
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] linetime: 119, ips linetime: 0
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] num_scalers: 2, scaler_users: 0x0, scaler_id: -1
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] pch pfit: pos: 0x00000000, size: 0x00000000, disabled, force thru: no
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] ips: 0, double wide: 0
      [drm:icl_dump_hw_state [i915]] dpll_hw_state: cfgcr0: 0x1c001a5, cfgcr1: 0x8b, mg_refclkin_ctl: 0x0, hg_clktop2_coreclkctl1: 0x0, mg_clktop2_hsclkctl: 0x0, mg_pll_div0: 0x0, mg_pll_div2: 0x0, mg_pll_lf: 0x0, mg_pll_frac_lock: 0x0, mg_pll_ssc: 0x0, mg_pll_bias: 0x0, mg_pll_tdc_coldst_bias: 0x0
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] csc_mode: 0x0 gamma_mode: 0x0 gamma_enable: 0 csc_enable: 0
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] MST master transcoder: <invalid>
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] [PLANE:31:plane 1A] fb: [FB:262] 1920x1080 format = XR24 little-endian (0x34325258), visible: yes
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] 	rotation: 0x1, scaler: -1
      i915 0000:00:02.0: [drm:intel_dump_pipe_config [i915]] 	src: 1920.000000x1080.000000+0.000000+0.000000 dst: 1920x1080+0+0
      i915 0000:00:02.0: [drm:intel_psr_disable_locked [i915]] Disabling PSR1
      i915 0000:00:02.0: [drm:intel_ddi_update_pipe [i915]] Panel doesn't support DRRS
      ------------[ cut here ]------------
      i915 0000:00:02.0: drm_WARN_ON(fbc->active)
      WARNING: CPU: 4 PID: 1175 at drivers/gpu/drm/i915/display/intel_fbc.c:973 __intel_fbc_disable+0xa5/0x130 [i915]
      Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic i915 mei_hdcp x86_pkg_temp_thermal coretemp crct10dif_pclmul snd_hda_intel crc32_pclmul snd_intel_dspcfg snd_hda_codec ghash_clmulni_intel snd_hwdep snd_hda_core cdc_ether e1000e usbnet mii snd_pcm ptp mei_me pps_core mei thunderbolt intel_lpss_pci prime_numbers
      CPU: 4 PID: 1175 Comm: kms_frontbuffer Tainted: G     U            5.5.0-CI-Trybot_5651+ #1
      Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP TLC, BIOS ICLSFWR1.R00.3234.A01.1906141750 06/14/2019
      RIP: 0010:__intel_fbc_disable+0xa5/0x130 [i915]
      Code: 8b 67 50 4d 85 e4 0f 84 8f 00 00 00 e8 44 33 30 e1 48 c7 c1 72 f6 4c a0 4c 89 e2 48 89 c6 48 c7 c7 42 f6 4c a0 e8 0b 9d ce e0 <0f> 0b eb 90 48 8b 7b 18 4c 8b 67 50 4d 85 e4 74 6d e8 15 33 30 e1
      RSP: 0018:ffffc90000613b68 EFLAGS: 00010282
      RAX: 0000000000000000 RBX: ffff8884799d0000 RCX: 0000000000000006
      RDX: 0000000000001905 RSI: ffff888495dac970 RDI: ffffffff823731a1
      RBP: ffff88847c05d000 R08: ffff888495dac970 R09: 0000000000000000
      R10: ffffc90000613b88 R11: 0000000000000000 R12: ffff88849bba7e40
      R13: ffff8884799d0000 R14: ffff888498564000 R15: 0000000000000000
      FS:  00007f8157f08300(0000) GS:ffff8884a0000000(0000) knlGS:0000000000000000
      CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
      CR2: 00007ffdbfea2eb8 CR3: 000000049d1cc001 CR4: 0000000000760ee0
      PKRU: 55555554
      Call Trace:
       intel_fbc_disable+0x4a/0x50 [i915]
       intel_update_crtc+0x12c/0x1d0 [i915]
       skl_commit_modeset_enables+0x14d/0x600 [i915]
       intel_atomic_commit_tail+0x30d/0x1480 [i915]
       ? queue_work_on+0x31/0x70
       ? intel_atomic_commit_ready+0x3f/0x48 [i915]
       ? __i915_sw_fence_complete+0x1a0/0x250 [i915]
       intel_atomic_commit+0x312/0x390 [i915]
       intel_psr_fastset_force+0x119/0x150 [i915]
       i915_edp_psr_debug_set+0x53/0x70 [i915]
       simple_attr_write+0xb0/0xd0
       full_proxy_write+0x51/0x80
       vfs_write+0xb9/0x1d0
       ksys_write+0x9f/0xe0
       do_syscall_64+0x4f/0x220
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
      RIP: 0033:0x7f8157240281
      Code: c3 0f 1f 84 00 00 00 00 00 48 8b 05 59 8d 20 00 c3 0f 1f 84 00 00 00 00 00 8b 05 8a d1 20 00 85 c0 75 16 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 57 f3 c3 0f 1f 44 00 00 41 54 55 49 89 d4 53
      RSP: 002b:00007ffdbfea59d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
      RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f8157240281
      RDX: 0000000000000003 RSI: 00007f8157901152 RDI: 0000000000000008
      RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
      R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8157901152
      R13: 0000000000000008 R14: 00005589d298dce0 R15: 0000000000000000
      irq event stamp: 55208
      hardirqs last  enabled at (55207): [<ffffffff8112f3fc>] vprintk_emit+0xcc/0x330
      hardirqs last disabled at (55208): [<ffffffff81001ca0>] trace_hardirqs_off_thunk+0x1a/0x1c
      softirqs last  enabled at (54926): [<ffffffff81e00385>] __do_softirq+0x385/0x47f
      softirqs last disabled at (54915): [<ffffffff810ba15a>] irq_exit+0xba/0xc0
      ---[ end trace afa50c52e5a512bb ]---
      [drm:__intel_fbc_disable [i915]] Disabling FBC on pipe A
      i915 0000:00:02.0: [drm:verify_connector_state [i915]] [CONNECTOR:215:eDP-1]
      i915 0000:00:02.0: [drm:intel_atomic_commit_tail [i915]] [CRTC:91:pipe A]
      [drm:intel_ddi_get_config [i915]] [ENCODER:214:DDI A] Fec status: 0
      i915 0000:00:02.0: [drm:verify_single_dpll_state.isra.150 [i915]] DPLL 0
      
      v2:
      using intel_fbc_can_enable() instead of crtc_state->enable_fbc (Ville)
      
      Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
      Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
      Signed-off-by: default avatarJosé Roberto de Souza <jose.souza@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200306185833.53984-1-jose.souza@intel.com
      dff8ba1c
    • Lyude Paul's avatar
      drm/i915/mst: Hookup DRM DP MST late_register/early_unregister callbacks · f972b495
      Lyude Paul authored
      i915 can enable aux device nodes for DP MST by calling
      drm_dp_mst_connector_late_register()/
      drm_dp_mst_connector_early_unregister(),
      so let's hook that up.
      
      Changes since v1:
      * Call intel_connector_register/unregister() from
        intel_dp_mst_connector_late_register/unregister() so we don't lose
        error injection - Ville Syrjälä
      Changes since v2:
      * Don't forget to clean up if intel_connector_register() fails - Ville
      
      Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
      Cc: Manasi Navare <manasi.d.navare@intel.com>
      Cc: "Lee, Shawn C" <shawn.c.lee@intel.com>
      Signed-off-by: default avatarLyude Paul <lyude@redhat.com>
      Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200310195122.1590925-1-lyude@redhat.com
      f972b495
    • Chris Wilson's avatar
      drm/i915: Improve the start alignment of bonded pairs · 798fa870
      Chris Wilson authored
      Always wait on the start of the signaler request to reduce the problem
      of dequeueing the bonded pair too early -- we want both payloads to
      start at the same time, with no latency, and yet still allow others to
      make full use of the slack in the system. This reduce the amount of time
      we spend waiting on the semaphore used to synchronise the start of the
      bonded payload.
      Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
      Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@intel.com>
      Link: https://patchwork.freedesktop.org/patch/msgid/20200306133852.3420322-3-chris@chris-wilson.co.uk
      798fa870
  3. 09 Mar, 2020 19 commits