Example #1
0
/**
 * intel_fbc_init - Initialize FBC
 * @dev_priv: the i915 device
 *
 * This function might be called during PM init process.
 */
void intel_fbc_init(struct drm_i915_private *dev_priv)
{
	struct intel_fbc *fbc = &dev_priv->fbc;

	INIT_WORK(&fbc->work.work, intel_fbc_work_fn);
	INIT_WORK(&fbc->underrun_work, intel_fbc_underrun_work_fn);
	mutex_init(&fbc->lock);
	fbc->enabled = false;
	fbc->active = false;
	fbc->work.scheduled = false;

	if (need_fbc_vtd_wa(dev_priv))
		mkwrite_device_info(dev_priv)->has_fbc = false;

	i915_modparams.enable_fbc = intel_sanitize_fbc_option(dev_priv);
	DRM_DEBUG_KMS("Sanitized enable_fbc value: %d\n",
		      i915_modparams.enable_fbc);

	if (!HAS_FBC(dev_priv)) {
		fbc->no_fbc_reason = "unsupported by this chipset";
		return;
	}

	/* This value was pulled out of someone's hat */
	if (INTEL_GEN(dev_priv) <= 4 && !IS_GM45(dev_priv))
		I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT);

	/* We still don't have any sort of hardware state readout for FBC, so
	 * deactivate it in case the BIOS activated it to make sure software
	 * matches the hardware state. */
	if (intel_fbc_hw_is_active(dev_priv))
		intel_fbc_hw_deactivate(dev_priv);
}
Example #2
0
static void intel_fbc_deactivate(struct drm_i915_private *dev_priv)
{
	struct intel_fbc *fbc = &dev_priv->fbc;

	WARN_ON(!mutex_is_locked(&fbc->lock));

	/* Calling cancel_work() here won't help due to the fact that the work
	 * function grabs fbc->lock. Just set scheduled to false so the work
	 * function can know it was cancelled. */
	fbc->work.scheduled = false;

	if (fbc->active)
		intel_fbc_hw_deactivate(dev_priv);
}