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  1. 22 5月, 2017 1 次提交
  3. 10 5月, 2017 1 次提交
    • D
      drm/vblank: drop the mode argument from drm_calc_vbltimestamp_from_scanoutpos · 1bf6ad62
      由 Daniel Vetter 提交于 
      If we restrict this helper to only kms drivers (which is the case) we
can look up the correct mode easily ourselves. But it's a bit tricky:

- All legacy drivers look at crtc->hwmode. But that is updated already
  at the beginning of the modeset helper, which means when we disable
  a pipe. Hence the final timestamps might be a bit off. But since
  this is an existing bug I'm not going to change it, but just try to
  be bug-for-bug compatible with the current code. This only applies
  to radeon&amdgpu.

- i915 tries to get it perfect by updating crtc->hwmode when the pipe
  is off (i.e. vblank->enabled = false).

- All other atomic drivers look at crtc->state->adjusted_mode. Those
  that look at state->requested_mode simply don't adjust their mode,
  so it's the same. That has two problems: Accessing crtc->state from
  interrupt handling code is unsafe, and it's updated before we shut
  down the pipe. For nonblocking modesets it's even worse.

For atomic drivers try to implement what i915 does. To do that we add
a new hwmode field to the vblank structure, and update it from
drm_calc_timestamping_constants(). For atomic drivers that's called
from the right spot by the helper library already, so all fine. But
for safety let's enforce that.

For legacy driver this function is only called at the end (oh the
fun), which is broken, so again let's not bother and just stay
bug-for-bug compatible.

The  benefit is that we can use drm_calc_vbltimestamp_from_scanoutpos
directly to implement ->get_vblank_timestamp in every driver, deleting
a lot of code.

v2: Completely new approach, trying to mimick the i915 solution.

v3: Fixup kerneldoc.

v4: Drop the WARN_ON to check that the vblank is off, atomic helpers
currently unconditionally call this. Recomputing the same stuff should
be harmless.

v5: Fix typos and move misplaced hunks to the right patches (Neil).

v6: Undo hunk movement (kbuild).

Cc: Mario Kleiner <mario.kleiner@tuebingen.mpg.de>
Cc: Eric Anholt <eric@anholt.net>
Cc: Rob Clark <robdclark@gmail.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: NNeil Armstrong <narmstrong@baylibre.com>
Acked-by: NVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170509140329.24114-4-daniel.vetter@ffwll.ch
      1bf6ad62
  5. 09 5月, 2017 1 次提交
  7. 14 4月, 2017 1 次提交
  9. 18 3月, 2017 1 次提交
  11. 01 3月, 2017 1 次提交
  13. 09 2月, 2017 1 次提交
  15. 08 2月, 2017 1 次提交
  17. 02 2月, 2017 1 次提交
  19. 30 1月, 2017 1 次提交
  21. 10 12月, 2016 2 次提交
  23. 17 11月, 2016 1 次提交
    • J
      drm/vc4: Add fragment shader threading support · c778cc5d
      由 Jonas Pfeil 提交于 
      FS threading brings performance improvements of 0-20% in glmark2.

The validation code checks for thread switch signals and ensures that
the registers of the other thread are not touched, and that our clamps
are not live across thread switches.  It also checks that the
threading and branching instructions do not interfere.

(Original patch by Jonas, changes by anholt for style cleanup,
removing validation the kernel doesn't need to do, and adding the flag
for userspace).

v2: Minor style fixes from checkpatch.
Signed-off-by: NJonas Pfeil <pfeiljonas@gmx.de>
Signed-off-by: NEric Anholt <eric@anholt.net>
      c778cc5d
  25. 05 11月, 2016 1 次提交
    • E
      drm/vc4: Use runtime autosuspend to avoid thrashing V3D power state. · 3a622346
      由 Eric Anholt 提交于 
      The pm_runtime_put() we were using immediately released power on the
device, which meant that we were generally turning the device off and
on once per frame.  In many profiles I've looked at, that added up to
about 1% of CPU time, but this could get worse in the case of frequent
rendering and readback (as may happen in X rendering).  By keeping the
device on until we've been idle for a couple of frames, we drop the
overhead of runtime PM down to sub-.1%.
Signed-off-by: NEric Anholt <eric@anholt.net>
      3a622346
  27. 04 11月, 2016 1 次提交
    • E
      drm/vc4: Add support for rendering with ETC1 textures. · 7154d76f
      由 Eric Anholt 提交于 
      The validation for it ends up being quite simple, but I hadn't got
around to it before merging the driver.  For backwards compatibility,
we also need to add a flag so that the userspace GL driver can easily
tell if the kernel will allow ETC1 textures (on an old kernel, it will
continue to convert to RGBA8)
Signed-off-by: NEric Anholt <eric@anholt.net>
      7154d76f
  29. 02 11月, 2016 1 次提交
  31. 22 9月, 2016 1 次提交
  33. 20 8月, 2016 1 次提交
  35. 12 8月, 2016 1 次提交
  37. 18 7月, 2016 1 次提交
  39. 16 7月, 2016 1 次提交
  41. 14 7月, 2016 1 次提交
    • E
      drm/vc4: Add a getparam ioctl for getting the V3D identity regs. · af713795
      由 Eric Anholt 提交于 
      As I extend the driver to support different V3D revisions, userspace
needs to know what version it's targeting.  This is most easily
detected using the V3D identity registers.

v2: Make sure V3D is runtime PM on when reading the registers.
v3: Switch to a 64-bit param value (suggested by Rob Clark in review)
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> (v2)
Reviewed-by: Rob Clark <robdclark@gmail.com> (v3, over irc)
      af713795
  43. 12 7月, 2016 3 次提交
    • C
      drm/vc4: remove redundant ret status check · deb4765d
      由 Colin Ian King 提交于 
      At the current point where ret is being checked for non-zero it has
not changed since it was initialized to zero, hence the check and the
label unref are redundant and can be removed.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Reviewed-by: NEric Anholt <eric@anholt.net>
      deb4765d
    • M
      drm/vc4: Implement precise vblank timestamping. · 1bf59f1d
      由 Mario Kleiner 提交于 
      Precise vblank timestamping is implemented via the
usual scanout position based method. On VC4 the
pixelvalves PV do not have a scanout position
register. Only the hardware video scaler HVS has a
similar register which describes which scanline for
the output is currently composited and stored in the
HVS fifo for later consumption by the PV.

This causes a problem in that the HVS runs at a much
faster clock (system clock / audio gate) than the PV
which runs at video mode dot clock, so the unless the
fifo between HVS and PV is full, the HVS will progress
faster in its observable read line position than video
scan rate, so the HVS position reading can't be directly
translated into a scanout position for timestamp correction.

Additionally when the PV is in vblank, it doesn't consume
from the fifo, so the fifo gets full very quickly and then
the HVS stops compositing until the PV enters active scanout
and starts consuming scanlines from the fifo again, making
new space for the HVS to composite.

Therefore a simple translation of HVS read position into
elapsed time since (or to) start of active scanout does
not work, but for the most interesting cases we can still
get useful and sufficiently accurate results:

1. The PV enters active scanout of a new frame with the
   fifo of the HVS completely full, and the HVS can refill
   any fifo line which gets consumed and thereby freed up by
   the PV during active scanout very quickly. Therefore the
   PV and HVS work effectively in lock-step during active
   scanout with the fifo never having more than 1 scanline
   freed up by the PV before it gets refilled. The PV's
   real scanout position is therefore trailing the HVS
   compositing position as scanoutpos = hvspos - fifosize
   and we can get the true scanoutpos as HVS readpos minus
   fifo size, so precise timestamping works while in active
   scanout, except for the last few scanlines of the frame,
   when the HVS reaches end of frame, stops compositing and
   the PV catches up and drains the fifo. This special case
   would only introduce minor errors though.

2. If we are in vblank, then we can only guess something
   reasonable. If called from vblank irq, we assume the irq is
   usually dispatched with minimum delay, so we can take a
   timestamp taken at entry into the vblank irq handler as a
   baseline and then add a full vblank duration until the
   guessed start of active scanout. As irq dispatch is usually
   pretty low latency this works with relatively low jitter and
   good results.

   If we aren't called from vblank then we could be anywhere
   within the vblank interval, so we return a neutral result,
   simply the current system timestamp, and hope for the best.

Measurement shows the generated timestamps to be rather precise,
and at least never off more than 1 vblank duration worst-case.

Limitations: Doesn't work well yet for interlaced video modes,
             therefore disabled in interlaced mode for now.

v2: Use the DISPBASE registers to determine the FIFO size (changes
    by anholt)
Signed-off-by: NMario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Reviewed-and-tested-by: Mario Kleiner <mario.kleiner.de@gmail.com> (v2)
      1bf59f1d
    • E
      drm/vc4: Bind the HVS before we bind the individual CRTCs. · 7a100969
      由 Eric Anholt 提交于 
      We need to be able to look at the CRTC's registers in the HVS as part
of initialization, while the HVS doesn't need to look at the PV
registers.
Signed-off-by: NEric Anholt <eric@anholt.net>
Reviewed-and-tested-by: NMario Kleiner <mario.kleiner.de@gmail.com>
      7a100969
  45. 22 6月, 2016 2 次提交
  47. 07 6月, 2016 1 次提交
  49. 01 6月, 2016 2 次提交
  51. 03 5月, 2016 1 次提交
  53. 20 4月, 2016 1 次提交
  55. 15 4月, 2016 1 次提交
    • E
      drm/vc4: Add DPI driver · 08302c35
      由 Eric Anholt 提交于 
      The DPI interface involves taking a ton of our GPIOs to be used as
outputs, and routing display signals over them in parallel.

v2: Use display_info.bus_formats[] to replace our custom DT
    properties.
v3: Rebase on V3D documentation changes.
v4: Fix rebase detritus from V3D documentation changes.
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NRob Herring <robh@kernel.org>
      08302c35
  57. 08 2月, 2016 1 次提交
  59. 15 12月, 2015 1 次提交
  61. 08 12月, 2015 5 次提交