1. 05 Dec, 2015 1 commit
    • Dave Airlie's avatar
      Merge branch 'drm-fixes-4.4' of git://people.freedesktop.org/~agd5f/linux into drm-next · df4d4aa9
      Dave Airlie authored
      A few more last minute fixes for 4.4 on top of my pull request from
      earlier this week.  The big change here is a vblank regression fix due to
      commit 4dfd6486 "drm: Use vblank timestamps to guesstimate how many vblanks
      were missed".  Beyond that, a hotplug fix and a few VM fixes.
      
      * 'drm-fixes-4.4' of git://people.freedesktop.org/~agd5f/linux:
        drm/amdgpu: Fixup hw vblank counter/ts for new drm_update_vblank_count() (v3)
        drm/radeon: Fixup hw vblank counter/ts for new drm_update_vblank_count() (v2)
        drm/radeon: Retry DDC probing on DVI on failure if we got an HPD interrupt
        drm/amdgpu: add spin lock to protect freed list in vm (v2)
        drm/amdgpu: partially revert "drm/amdgpu: fix VM_CONTEXT*_PAGE_TABLE_END_ADDR" v2
        drm/amdgpu: take a BO reference for the user fence
        drm/amdgpu: take a BO reference in the display code
        drm/amdgpu: set snooped flags only on system addresses v2
        drm/amdgpu: fix race condition in amd_sched_entity_push_job
        drm/amdgpu: add err check for pin userptr
        add blacklist for thinkpad T40p
        drm/amdgpu: fix VM page table reference counting
        drm/amdgpu: fix userptr flags check
      df4d4aa9
  2. 04 Dec, 2015 12 commits
    • Alex Deucher's avatar
      drm/amdgpu: Fixup hw vblank counter/ts for new drm_update_vblank_count() (v3) · 8e36f9d3
      Alex Deucher authored
      commit 4dfd6486 "drm: Use vblank timestamps to guesstimate how many
      vblanks were missed" introduced in Linux 4.4-rc1 makes the drm core
      more fragile to drivers which don't update hw vblank counters and
      vblank timestamps in sync with firing of the vblank irq and
      essentially at leading edge of vblank.
      
      This exposed a problem with radeon-kms/amdgpu-kms which do not
      satisfy above requirements:
      
      The vblank irq fires a few scanlines before start of vblank, but
      programmed pageflips complete at start of vblank and
      vblank timestamps update at start of vblank, whereas the
      hw vblank counter increments only later, at start of vsync.
      
      This leads to problems like off by one errors for vblank counter
      updates, vblank counters apparently going backwards or vblank
      timestamps apparently having time going backwards. The net result
      is stuttering of graphics in games, or little hangs, as well as
      total failure of timing sensitive applications.
      
      See bug #93147 for an example of the regression on Linux 4.4-rc:
      
      https://bugs.freedesktop.org/show_bug.cgi?id=93147
      
      This patch tries to align all above events better from the
      viewpoint of the drm core / of external callers to fix the problem:
      
      1. The apparent start of vblank is shifted a few scanlines earlier,
      so the vblank irq now always happens after start of this extended
      vblank interval and thereby drm_update_vblank_count() always samples
      the updated vblank count and timestamp of the new vblank interval.
      
      To achieve this, the reporting of scanout positions by
      radeon_get_crtc_scanoutpos() now operates as if the vblank starts
      radeon_crtc->lb_vblank_lead_lines before the real start of the hw
      vblank interval. This means that the vblank timestamps which are based
      on these scanout positions will now update at this earlier start of
      vblank.
      
      2. The driver->get_vblank_counter() function will bump the returned
      vblank count as read from the hw by +1 if the query happens after
      the shifted earlier start of the vblank, but before the real hw increment
      at start of vsync, so the counter appears to increment at start of vblank
      in sync with the timestamp update.
      
      3. Calls from vblank irq-context and regular non-irq calls are now
      treated identical, always simulating the shifted vblank start, to
      avoid inconsistent results for queries happening from vblank irq vs.
      happening from drm_vblank_enable() or vblank_disable_fn().
      
      4. The radeon_flip_work_func will delay mmio programming a pageflip until
      the start of the real vblank iff it happens to execute inside the shifted
      earlier start of the vblank, so pageflips now also appear to execute at
      start of the shifted vblank, in sync with vblank counter and timestamp
      updates. This to avoid some races between updates of vblank count and
      timestamps that are used for swap scheduling and pageflip execution which
      could cause pageflips to execute before the scheduled target vblank.
      
      The lb_vblank_lead_lines "fudge" value is calculated as the size of
      the display controllers line buffer in scanlines for the given video
      mode: Vblank irq's are triggered by the line buffer logic when the line
      buffer refill for a video frame ends, ie. when the line buffer source read
      position enters the hw vblank. This means that a vblank irq could fire at
      most as many scanlines before the current reported scanout position of the
      crtc timing generator as the number of scanlines the line buffer can
      maximally hold for a given video mode.
      
      This patch has been successfully tested on a RV730 card with DCE-3 display
      engine and on a evergreen card with DCE-4 display engine, in single-display
      and dual-display configuration, with different video modes.
      
      A similar patch is needed for amdgpu-kms to fix the same problem.
      
      Limitations:
      
      - Maybe replace the udelay() in the flip_work_func() by a suitable
        usleep_range() for a bit better efficiency? Will try that.
      
      - Line buffer sizes in pixels are hard-coded on < DCE-4 to a value
        i just guessed to be high enough to work ok, lacking info on the true
        sizes atm.
      
      Probably fixes: fdo#93147
      
      Port of Mario's radeon fix to amdgpu.
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      (v1) Reviewed-by: Mario Kleiner <mario.kleiner.de@gmail.com>
      
      (v2) Refine amdgpu_flip_work_func() for better efficiency.
      
           In amdgpu_flip_work_func, replace the busy waiting udelay(5)
           with event lock held by a more performance and energy efficient
           usleep_range() until at least predicted true start of hw vblank,
           with some slack for scheduler happiness. Release the event lock
           during waits to not delay other outputs in doing their stuff, as
           the waiting can last up to 200 usecs in some cases.
      
           Also small fix to code comment and formatting in that function.
      
      (v2) Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
      
      (v3) Fix crash in crtc disabled case
      8e36f9d3
    • Mario Kleiner's avatar
      drm/radeon: Fixup hw vblank counter/ts for new drm_update_vblank_count() (v2) · 5b5561b3
      Mario Kleiner authored
      commit 4dfd6486 "drm: Use vblank timestamps to guesstimate how many
      vblanks were missed" introduced in Linux 4.4-rc1 makes the drm core
      more fragile to drivers which don't update hw vblank counters and
      vblank timestamps in sync with firing of the vblank irq and
      essentially at leading edge of vblank.
      
      This exposed a problem with radeon-kms/amdgpu-kms which do not
      satisfy above requirements:
      
      The vblank irq fires a few scanlines before start of vblank, but
      programmed pageflips complete at start of vblank and
      vblank timestamps update at start of vblank, whereas the
      hw vblank counter increments only later, at start of vsync.
      
      This leads to problems like off by one errors for vblank counter
      updates, vblank counters apparently going backwards or vblank
      timestamps apparently having time going backwards. The net result
      is stuttering of graphics in games, or little hangs, as well as
      total failure of timing sensitive applications.
      
      See bug #93147 for an example of the regression on Linux 4.4-rc:
      
      https://bugs.freedesktop.org/show_bug.cgi?id=93147
      
      This patch tries to align all above events better from the
      viewpoint of the drm core / of external callers to fix the problem:
      
      1. The apparent start of vblank is shifted a few scanlines earlier,
      so the vblank irq now always happens after start of this extended
      vblank interval and thereby drm_update_vblank_count() always samples
      the updated vblank count and timestamp of the new vblank interval.
      
      To achieve this, the reporting of scanout positions by
      radeon_get_crtc_scanoutpos() now operates as if the vblank starts
      radeon_crtc->lb_vblank_lead_lines before the real start of the hw
      vblank interval. This means that the vblank timestamps which are based
      on these scanout positions will now update at this earlier start of
      vblank.
      
      2. The driver->get_vblank_counter() function will bump the returned
      vblank count as read from the hw by +1 if the query happens after
      the shifted earlier start of the vblank, but before the real hw increment
      at start of vsync, so the counter appears to increment at start of vblank
      in sync with the timestamp update.
      
      3. Calls from vblank irq-context and regular non-irq calls are now
      treated identical, always simulating the shifted vblank start, to
      avoid inconsistent results for queries happening from vblank irq vs.
      happening from drm_vblank_enable() or vblank_disable_fn().
      
      4. The radeon_flip_work_func will delay mmio programming a pageflip until
      the start of the real vblank iff it happens to execute inside the shifted
      earlier start of the vblank, so pageflips now also appear to execute at
      start of the shifted vblank, in sync with vblank counter and timestamp
      updates. This to avoid some races between updates of vblank count and
      timestamps that are used for swap scheduling and pageflip execution which
      could cause pageflips to execute before the scheduled target vblank.
      
      The lb_vblank_lead_lines "fudge" value is calculated as the size of
      the display controllers line buffer in scanlines for the given video
      mode: Vblank irq's are triggered by the line buffer logic when the line
      buffer refill for a video frame ends, ie. when the line buffer source read
      position enters the hw vblank. This means that a vblank irq could fire at
      most as many scanlines before the current reported scanout position of the
      crtc timing generator as the number of scanlines the line buffer can
      maximally hold for a given video mode.
      
      This patch has been successfully tested on a RV730 card with DCE-3 display
      engine and on a evergreen card with DCE-4 display engine, in single-display
      and dual-display configuration, with different video modes.
      
      A similar patch is needed for amdgpu-kms to fix the same problem.
      
      Limitations:
      
      - Line buffer sizes in pixels are hard-coded on < DCE-4 to a value
        i just guessed to be high enough to work ok, lacking info on the true
        sizes atm.
      
      Fixes: fdo#93147
      Signed-off-by: default avatarMario Kleiner <mario.kleiner.de@gmail.com>
      Cc: Alex Deucher <alexander.deucher@amd.com>
      Cc: Michel Dänzer <michel.daenzer@amd.com>
      Cc: Harry Wentland <Harry.Wentland@amd.com>
      Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
      
      (v1) Tested-by: Dave Witbrodt <dawitbro@sbcglobal.net>
      
      (v2) Refine radeon_flip_work_func() for better efficiency:
      
           In radeon_flip_work_func, replace the busy waiting udelay(5)
           with event lock held by a more performance and energy efficient
           usleep_range() until at least predicted true start of hw vblank,
           with some slack for scheduler happiness. Release the event lock
           during waits to not delay other outputs in doing their stuff, as
           the waiting can last up to 200 usecs in some cases.
      
           Retested on DCE-3 and DCE-4 to verify it still works nicely.
      
      (v2) Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      5b5561b3
    • Lyude's avatar
      drm/radeon: Retry DDC probing on DVI on failure if we got an HPD interrupt · cb5d4166
      Lyude authored
      HPD signals on DVI ports can be fired off before the pins required for
      DDC probing actually make contact, due to the pins for HPD making
      contact first. This results in a HPD signal being asserted but DDC
      probing failing, resulting in hotplugging occasionally failing.
      
      This is somewhat rare on most cards (depending on what angle you plug
      the DVI connector in), but on some cards it happens constantly. The
      Radeon R5 on the machine used for testing this patch for instance, runs
      into this issue just about every time I try to hotplug a DVI monitor and
      as a result hotplugging almost never works.
      
      Rescheduling the hotplug work for a second when we run into an HPD
      signal with a failing DDC probe usually gives enough time for the rest
      of the connector's pins to make contact, and fixes this issue.
      Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
      Signed-off-by: default avatarLyude <cpaul@redhat.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      cb5d4166
    • jimqu's avatar
      drm/amdgpu: add spin lock to protect freed list in vm (v2) · 81d75a30
      jimqu authored
      there is a protection fault about freed list when OCL test.
      add a spin lock to protect it.
      
      v2: drop changes in vm_fini
      Signed-off-by: default avatarJimQu <jim.qu@amd.com>
      Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
      81d75a30
    • Christian König's avatar
      drm/amdgpu: partially revert "drm/amdgpu: fix VM_CONTEXT*_PAGE_TABLE_END_ADDR" v2 · 9c97b5ab
      Christian König authored
      The gtt_end is already inclusive, we don't need to subtract one here.
      
      v2 (chk): keep the fix for the VM code, cause here it really applies.
      Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
      Signed-off-by: default avatarAnatoli Antonovitch <anatoli.antonovitch@amd.com>
      Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      9c97b5ab
    • Christian König's avatar
      drm/amdgpu: take a BO reference for the user fence · f3f17692
      Christian König authored
      No need for a GEM reference here.
      Reviewed-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
      Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      f3f17692
    • Christian König's avatar
      drm/amdgpu: take a BO reference in the display code · e9d951a8
      Christian König authored
      No need for the GEM reference here.
      Reviewed-by: default avatarMichel Dänzer <michel.daenzer@amd.com>
      Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      e9d951a8
    • Christian König's avatar
      drm/amdgpu: set snooped flags only on system addresses v2 · 6d99905a
      Christian König authored
      Not necessary for VRAM.
      
      v2: no need to check if ttm is NULL.
      Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
      Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
      6d99905a
    • Daniel Vetter's avatar
      drm/nouveau: Fix pre-nv50 pageflip events (v4) · bbc8764f
      Daniel Vetter authored
      Apparently pre-nv50 pageflip events happen before the actual vblank
      period. Therefore that functionality got semi-disabled in
      
      commit af4870e4
      Author: Mario Kleiner <mario.kleiner.de@gmail.com>
      Date:   Tue May 13 00:42:08 2014 +0200
      
          drm/nouveau/kms/nv04-nv40: fix pageflip events via special case.
      
      Unfortunately that hack got uprooted in
      
      commit cc1ef118
      Author: Thierry Reding <treding@nvidia.com>
      Date:   Wed Aug 12 17:00:31 2015 +0200
      
          drm/irq: Make pipe unsigned and name consistent
      
      Triggering a warning when trying to sample the vblank timestamp for a
      non-existing pipe. There's a few ways to fix this:
      
      - Open-code the old behaviour, which just enshrines this slight
        breakage of the userspace ABI.
      
      - Revert Mario's commit and again inflict broken timestamps, again not
        pretty.
      
      - Fix this for real by delaying the pageflip TS until the next vblank
        interrupt, thereby making it accurate.
      
      This patch implements the third option. Since having a page flip
      interrupt that happens when the pageflip gets armed and not when it
      completes in the next vblank seems to be fairly common (older i915 hw
      works very similarly) create a new helper to arm vblank events for
      such drivers.
      
      v2 (Mario Kleiner):
      - Fix function prototypes in drmP.h
      - Add missing vblank_put() for pageflip completion without
        pageflip event.
      - Initialize sequence number for queued pageflip event to avoid
        trouble in drm_handle_vblank_events().
      - Remove dead code and spelling fix.
      
      v3 (Mario Kleiner):
      - Add a signed-off-by and cc stable tag per Ilja's advice.
      
      v4 (Thierry Reding):
      - Fix kerneldoc typo, discovered by Michel Dänzer
      - Rearrange tags and changelog
      
      Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=106431
      Cc: Thierry Reding <treding@nvidia.com>
      Cc: Mario Kleiner <mario.kleiner.de@gmail.com>
      Acked-by: default avatarBen Skeggs <bskeggs@redhat.com>
      Cc: Ilia Mirkin <imirkin@alum.mit.edu>
      Signed-off-by: default avatarDaniel Vetter <daniel.vetter@intel.com>
      Reviewed-by: default avatarMario Kleiner <mario.kleiner.de@gmail.com>
      Cc: stable@vger.kernel.org # v4.3
      Signed-off-by: default avatarMario Kleiner <mario.kleiner.de@gmail.com>
      Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      bbc8764f
    • Thomas Hellstrom's avatar
      drm: Fix an unwanted master inheritance v2 · a0af2e53
      Thomas Hellstrom authored
      A client calling drmSetMaster() using a file descriptor that was opened
      when another client was master would inherit the latter client's master
      object and all its authenticated clients.
      
      This is unwanted behaviour, and when this happens, instead allocate a
      brand new master object for the client calling drmSetMaster().
      
      Fixes a BUG() throw in vmw_master_set().
      
      Cc: <stable@vger.kernel.org>
      Signed-off-by: default avatarThomas Hellstrom <thellstrom@vmware.com>
      Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      a0af2e53
    • Dave Airlie's avatar
      Merge tag 'imx-drm-fixes-2015-12-01' of git://git.pengutronix.de/git/pza/linux into drm-fixes · f46e699c
      Dave Airlie authored
      imx-drm crtc, plane, parallel panel, and TV encoder fixes
      
      - Use drm_crtc_send_vblank_event to fix per crtc vblank handling
      - Move the crtc device of_node assignment out of the ipuv3-crtc driver into
        ipu-common code, where the devices are created.
      - Fix parallel display support with simple-panels
      - Remove some unused fields and superfluous checks
      - Switch to universal planes and add error handling for primary plane creation
      - Fix module autoload for TV encoder driver
      
      * tag 'imx-drm-fixes-2015-12-01' of git://git.pengutronix.de/git/pza/linux:
        drm: imx: imx-tve: Fix module autoload for OF platform driver
        drm: imx: convert to drm_crtc_send_vblank_event()
        GPU-DRM-IMX: Delete an unnecessary check before drm_fbdev_cma_restore_mode()
        drm/imx: Remove of_node assignment from ipuv3-crtc driver probe
        gpu: ipu-v3: Assign of_node of child platform devices to corresponding ports
        gpu: ipu-v3: Remove reg_offset field
        gpu: ipu-v3: drop unused dmfc field from client platform data
        drm/imx: parallel-display: allow to determine bus format from the connected panel
        drm/imx: ipuv3-crtc: Return error if ipu_plane_init() fails for primary plane
        drm/imx: switch to universal planes
      f46e699c
    • Dave Airlie's avatar
      Merge tag 'drm-intel-fixes-2015-12-03' of git://anongit.freedesktop.org/drm-intel into drm-fixes · 00b83070
      Dave Airlie authored
      Another batch of drm/i915 fixes for v4.4, on top of the ones from
      earlier this week. One timeout handling regression fix from Chris, and
      backport of five patches from our -next to fix a power management
      related HDMI hotplug regression.
      
      * tag 'drm-intel-fixes-2015-12-03' of git://anongit.freedesktop.org/drm-intel:
        drm/i915: take a power domain reference while checking the HDMI live status
        drm/i915: add MISSING_CASE to a few port/aux power domain helpers
        drm/i915/ddi: fix intel_display_port_aux_power_domain() after HDMI detect
        drm/i915: Introduce a gmbus power domain
        drm/i915: Clean up AUX power domain handling
        drm/i915: Check the timeout passed to i915_wait_request
      00b83070
  3. 02 Dec, 2015 12 commits
  4. 01 Dec, 2015 3 commits
  5. 30 Nov, 2015 11 commits
  6. 29 Nov, 2015 1 commit
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending · 36511e86
      Linus Torvalds authored
      Pull SCSI target fixes from Nicholas Bellinger:
       - fix tcm-user backend driver expired cmd time processing (agrover)
       - eliminate kref_put_spinlock_irqsave() for I/O completion (bart)
       - fix iscsi login kthread failure case hung task regression (nab)
       - fix COMPARE_AND_WRITE completion use-after-free race (nab)
       - fix COMPARE_AND_WRITE with SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC non zero
         SGL offset data corruption.  (Jan + Doug)
       - fix >= v4.4-rc1 regression for tcm_qla2xxx enable configfs attribute
         (Himanshu + HCH)
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
        target/stat: print full t10_wwn.model buffer
        target: fix COMPARE_AND_WRITE non zero SGL offset data corruption
        qla2xxx: Fix regression introduced by target configFS changes
        kref: Remove kref_put_spinlock_irqsave()
        target: Invoke release_cmd() callback without holding a spinlock
        target: Fix race for SCF_COMPARE_AND_WRITE_POST checking
        iscsi-target: Fix rx_login_comp hang after login failure
        iscsi-target: return -ENOMEM instead of -1 in case of failed kmalloc()
        target/user: Do not set unused fields in tcmu_ops
        target/user: Fix time calc in expired cmd processing
      36511e86