C++ (Cpp) drm_dp_cec_handle_irq Beispiele

Beispiel #1

Datei: drm_dp_cec.c Projekt: Lyude/linux

/**
 * drm_dp_cec_irq() - handle CEC interrupt, if any
 * @aux: DisplayPort AUX channel
 *
 * Should be called when handling an IRQ_HPD request. If CEC-tunneling-over-AUX
 * is present, then it will check for a CEC_IRQ and handle it accordingly.
 */
void drm_dp_cec_irq(struct drm_dp_aux *aux)
{
	u8 cec_irq;
	int ret;

	mutex_lock(&aux->cec.lock);
	if (!aux->cec.adap)
		goto unlock;

	ret = drm_dp_dpcd_readb(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1,
				&cec_irq);
	if (ret < 0 || !(cec_irq & DP_CEC_IRQ))
		goto unlock;

	drm_dp_cec_handle_irq(aux);
	drm_dp_dpcd_writeb(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1, DP_CEC_IRQ);
unlock:
	mutex_unlock(&aux->cec.lock);
}

Beispiel #2

Datei: drm_dp_cec.c Projekt: AlexShiLucky/linux

/**
 * drm_dp_cec_irq() - handle CEC interrupt, if any
 * @aux: DisplayPort AUX channel
 *
 * Should be called when handling an IRQ_HPD request. If CEC-tunneling-over-AUX
 * is present, then it will check for a CEC_IRQ and handle it accordingly.
 */
void drm_dp_cec_irq(struct drm_dp_aux *aux)
{
	u8 cec_irq;
	int ret;

	/* No transfer function was set, so not a DP connector */
	if (!aux->transfer)
		return;

	mutex_lock(&aux->cec.lock);
	if (!aux->cec.adap)
		goto unlock;

	ret = drm_dp_dpcd_readb(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1,
				&cec_irq);
	if (ret < 0 || !(cec_irq & DP_CEC_IRQ))
		goto unlock;

	drm_dp_cec_handle_irq(aux);
	drm_dp_dpcd_writeb(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1, DP_CEC_IRQ);
unlock:
	mutex_unlock(&aux->cec.lock);
}