diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-03-09 18:44:34 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-03-13 22:15:10 +0300 |
| commit | 44e921d4a19846e39fa818afa9d2d22c3117210a (patch) | |
| tree | 54dd567690fcac683a0d8bdd8ee8aae080f57a89 /drivers/gpu/drm/i915/i915_drv.h | |
| parent | dd584fc0711a28fb338bf66a623178e468c82272 (diff) | |
| download | linux-44e921d4a19846e39fa818afa9d2d22c3117210a.tar.xz | |
drm/i915: Optimize VLV/CHV display FIFO updates
Use I915_{READ,WRITE}_FW() for updating the DSPARB registers on
VLV/CHV. This is less expesive as we can grab the uncore.lock across
the entire sequence of reads and writes instead of each register
access grabbing it.
This also allows us to eliminate the dsparb lock entirely as the
uncore.lock now effectively protects the contents of the DSPARB
registers.
v2: Add a note that interrupts are already disabled (Chris)
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170309154434.29303-6-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index d11c96405a53..48ff64812289 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2375,9 +2375,6 @@ struct drm_i915_private { } sagv_status; struct { - /* protects DSPARB registers on pre-g4x/vlv/chv */ - spinlock_t dsparb_lock; - /* * Raw watermark latency values: * in 0.1us units for WM0, |