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| author |   Animesh Manna <animesh.manna@intel.com> | 2019-09-20 17:29:25 +0530 |
|---|---|---|
| committer |   Jani Nikula <jani.nikula@intel.com> | 2019-09-23 10:11:11 +0300 |
| commit | a6e58d9a2e045e800ac54b838c05656f982c36fe (patch) | |
| tree | 887eb95f747cbb0997e1719f6042d065471172d3 /drivers/gpu/drm/i915/display/intel_dsb.c | |
| parent | drm/i915/dsb: Indexed register write function for DSB. (diff) | |
| download | linux-dev-a6e58d9a2e045e800ac54b838c05656f982c36fe.tar.xz linux-dev-a6e58d9a2e045e800ac54b838c05656f982c36fe.zip | |
drm/i915/dsb: Check DSB engine status.
As per bspec check for DSB status before programming any
of its register. Inline function added to check the dsb status.
Cc: Michel Thierry <michel.thierry@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Shashank Sharma <shashank.sharma@intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190920115930.27829-6-animesh.manna@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dsb.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index faa853b08458..6000050b18a6 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -17,6 +17,15 @@ #define DSB_BYTE_EN_SHIFT 20 #define DSB_REG_VALUE_MASK 0xfffff +static inline bool is_dsb_busy(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = container_of(dsb, typeof(*crtc), dsb); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; + + return DSB_STATUS & I915_READ(DSB_CTRL(pipe, dsb->id)); +} + struct intel_dsb * intel_dsb_get(struct intel_crtc *crtc) { |