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  1. 09 11月, 2017 2 次提交
  3. 18 10月, 2017 2 次提交
  5. 17 10月, 2017 1 次提交
  7. 11 10月, 2017 12 次提交
  9. 10 10月, 2017 1 次提交
  11. 07 10月, 2017 1 次提交
  13. 04 10月, 2017 1 次提交
    • R
      drm/i915/skl: Fix has_ipc on skl and document WaDisableIPC. · 4d6ef0da
      由 Rodrigo Vivi 提交于 
      According to Spec for SKL+: "Isochronous Priority Control.
If enabled, Display sends demoted requests once the transition
watermark is reached. If transition watermark is not enabled,
Display sends demoted requests when the display buffer is full."

The commit 'e57f1c02 ("drm/i915/gen9+: Add has_ipc flag in
device info structure")' introduced that as gen9+ but missing many
SKL Skus.

I believe the reason for that is Spec also mentions workarounds for
SKL-ALL: "IPC (Isoch Priority Control) may cause underflows
WA: Do not enable IPC in register ARB_CTL2"

It seems lame to add the feature and forever disable it,
but it will avoid a mistake of enabling it when we are reorganizing
the feature definitions on i915_pci.c later.

It will also allow us to probably extend that workaround for
other platforms.

Cc: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NRodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: NMahesh Kumar <mahesh1.kumar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171003063652.17248-1-rodrigo.vivi@intel.com
      4d6ef0da
  15. 22 9月, 2017 1 次提交
  17. 19 9月, 2017 1 次提交
  19. 14 9月, 2017 1 次提交
  21. 07 9月, 2017 6 次提交
  23. 06 9月, 2017 1 次提交
  25. 01 9月, 2017 1 次提交
  27. 31 8月, 2017 1 次提交
  29. 23 8月, 2017 1 次提交
    • C
      drm/i915: Boost GPU clocks if we miss the pageflip's vblank · 74d290f8
      由 Chris Wilson 提交于 
      If we miss the current vblank because the gpu was busy, that may cause a
jitter as the frame rate temporarily drops. We try to limit the impact
of this by then boosting the GPU clock to deliver the frame as quickly
as possible. Originally done in commit 6ad790c0 ("drm/i915: Boost GPU
frequency if we detect outstanding pageflips") but was never forward
ported to atomic and finally dropped in commit fd3a4024 ("drm/i915:
Rip out legacy page_flip completion/irq handling").

One of the most typical use-cases for this is a mostly idle desktop.
Rendering one frame of the desktop's frontbuffer can easily be
accomplished by the GPU running at low frequency, but often exceeds
the time budget of the desktop compositor. The result is that animations
such as opening the menu, doing a fullscreen switch, or even just trying
to move a window around are slow and jerky. We need to respond within a
frame to give the best impression of a smooth UX, as a compromise we
instead respond if that first frame misses its goal. The result should
be a near-imperceivable initial delay and a smooth animation even
starting from idle. The cost, as ever, is that we spend more power than
is strictly necessary as we overestimate the required GPU frequency and
then try to ramp down.

This of course is reactionary, too little, too late; nevertheless it is
surprisingly effective.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102199Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170817123706.6777-1-chris@chris-wilson.co.ukTested-by: NLyude Paul <lyude@redhat.com>
Reviewed-by: NRadoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
      74d290f8
  31. 19 8月, 2017 2 次提交
  33. 16 8月, 2017 1 次提交
  35. 11 8月, 2017 4 次提交