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| author | Paulo Zanoni <paulo.r.zanoni@intel.com> | 2013-07-23 11:19:26 -0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-07-24 10:37:10 +0200 |
| commit | be256dc70284c028d0dd828b18b8f804e310507b (patch) | |
| tree | 8c7958e44305ce17af999b08de41584b94e096cd /drivers/gpu/drm/i915/intel_drv.h | |
| parent | 47701c3ba26cb33ebe8a5e899ec922ab0de621a3 (diff) | |
| download | blackbird-obmc-linux-be256dc70284c028d0dd828b18b8f804e310507b.tar.gz blackbird-obmc-linux-be256dc70284c028d0dd828b18b8f804e310507b.zip | |
drm/i915: add functions to disable and restore LCPLL
For now there are no callers, but these functions are going to be
needed for the code that allows Package C8+. Other future features may
also require this code.
Also merge the commit which introduced assert_can_disable_lcpll and
had the following commit message:
Most of the hardware needs to be disabled before LCPLL is disabled, so
let's add a function to assert some of items listed in the "Display
Sequences for LCPLL disabling" documentation.
The idea is that hsw_disable_lcpll should not disable the hardware,
the callers need to take care of calling hsw_disable_lcpll only once
everything is already disabled.
v2: - Rebase.
- Fix D_COMP wait timeout.
v3: - Use wait_for_atomic_use (Ben)
- Remove/add a useless/needed POSTING_READ (Ben)
- Early return in case LCPLL is already restored (Ben)
- Add ndelay(100) (Ben)
v4: - Merge the commit that added assert_can_disable_lcpll (Ben)
- Add interrupt assertions (Ben)
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
[danvet: Fix compile fail since there's no HAS_LP_PCH yet.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_drv.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 40e955d00b2b..253fc1e9dbe2 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -838,5 +838,8 @@ extern bool intel_set_pch_fifo_underrun_reporting(struct drm_device *dev, extern void intel_edp_psr_enable(struct intel_dp *intel_dp); extern void intel_edp_psr_disable(struct intel_dp *intel_dp); extern void intel_edp_psr_update(struct drm_device *dev); +extern void hsw_disable_lcpll(struct drm_i915_private *dev_priv, + bool switch_to_fclk, bool allow_power_down); +extern void hsw_restore_lcpll(struct drm_i915_private *dev_priv); #endif /* __INTEL_DRV_H__ */ |
