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  1. 28 Aug, 2017 3 commits
    • Jason Ekstrand's avatar
      drm/syncobj: Add a race-free drm_syncobj_fence_get helper (v2) · 309a5482
      Jason Ekstrand authored 
      The atomic exchange operation in drm_syncobj_replace_fence is sufficient
for the case where it races with itself.  However, if you have a race
between a replace_fence and dma_fence_get(syncobj->fence), you may end
up with the entire replace_fence happening between the point in time
where the one thread gets the syncobj->fence pointer and when it calls
dma_fence_get() on it.  If this happens, then the reference may be
dropped before we get a chance to get a new one.  The new helper uses
dma_fence_get_rcu_safe to get rid of the race.

This is also needed because it allows us to do a bit more than just get
a reference in drm_syncobj_fence_get should we wish to do so.

v2:
 - RCU isn't that scary
 - Call rcu_read_lock/unlock
 - Don't rename fence to _fence
 - Make the helper static inline
Signed-off-by: default avatarJason Ekstrand <jason@jlekstrand.net>
Acked-by: Christian König <christian.koenig@amd.com> (v1)
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      309a5482
    • Jason Ekstrand's avatar
      drm/syncobj: Rename fence_get to find_fence · afaf5923
      Jason Ekstrand authored 
      The function has far more in common with drm_syncobj_find than with
any in the get/put functions.
Signed-off-by: default avatarJason Ekstrand <jason@jlekstrand.net>
Acked-by: Christian König <christian.koenig@amd.com> (v1)
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      afaf5923
    • John Stultz's avatar
      drm: kirin: Add mode_valid logic to avoid mode clocks we can't generate · 71f23543
      John Stultz authored 
      Currently the hikey dsi logic cannot generate accurate byte
clocks values for all pixel clock values. Thus if a mode clock
is selected that cannot match the calculated byte clock, the
device will boot with a blank screen.

This patch uses the new mode_valid callback (many thanks to
Jose Abreu for upstreaming it!) to ensure we don't select
modes we cannot generate.

Also, since the ade crtc code will adjust the mode in mode_set,
this patch also adds a mode_fixup callback which we use to make
sure we are validating the mode clock that will eventually be
used.

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Xinliang Liu <xinliang.liu@linaro.org>
Cc: Xinliang Liu <z.liuxinliang@hisilicon.com>
Cc: Rongrong Zou <zourongrong@gmail.com>
Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Cc: Chen Feng <puck.chen@hisilicon.com>
Cc: Jose Abreu <Jose.Abreu@synopsys.com>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
Reviewed-by: default avatarXinliang Liu <xinliang.liu@linaro.org>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
      71f23543
  3. 24 Aug, 2017 4 commits
  5. 23 Aug, 2017 4 commits
  7. 22 Aug, 2017 29 commits
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