@@ -33,6 +33,46 @@ static inline bool is_dsb_busy(struct intel_dsb *dsb)
return DSB_STATUS & I915_READ(DSB_CTRL(pipe, dsb->id));
}
+static bool intel_dsb_enable_engine(struct intel_dsb *dsb)
+{
+ struct intel_crtc *crtc = dsb->crtc;
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+ u32 dsb_ctrl;
+
+ dsb_ctrl = I915_READ(DSB_CTRL(pipe, dsb->id));
+
+ if (DSB_STATUS & dsb_ctrl) {
+ DRM_DEBUG_KMS("DSB engine is busy.\n");
+ return false;
+ }
+
+ dsb_ctrl |= DSB_ENABLE;
+ I915_WRITE(DSB_CTRL(pipe, dsb->id), dsb_ctrl);
+
+ return true;
+}
+
+static bool intel_dsb_disable_engine(struct intel_dsb *dsb)
+{
+ struct intel_crtc *crtc = dsb->crtc;
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ enum pipe pipe = crtc->pipe;
+ u32 dsb_ctrl;
+
+ dsb_ctrl = I915_READ(DSB_CTRL(pipe, dsb->id));
+
+ if (DSB_STATUS & dsb_ctrl) {
+ DRM_DEBUG_KMS("DSB engine is busy.\n");
+ return false;
+ }
+
+ dsb_ctrl &= ~DSB_ENABLE;
+ I915_WRITE(DSB_CTRL(pipe, dsb->id), dsb_ctrl);
+
+ return true;
+}
+
struct intel_dsb *
intel_dsb_get(struct intel_crtc *crtc)
{
DSB will be used for performance improvement for some special scenario. DSB engine will be enabled based on need and after completion of its work will be disabled. Api added for enable/disable operation by using DSB_CTRL register. Cc: Michel Thierry <michel.thierry@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Animesh Manna <animesh.manna@intel.com> --- drivers/gpu/drm/i915/display/intel_dsb.c | 40 ++++++++++++++++++++++++ 1 file changed, 40 insertions(+)