From ffa075490ef7fc216108ab44c6c88bc27ad10a49 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Mon, 31 Aug 2015 11:41:19 +0200
Subject: [PATCH] [drm] Mark outputs as disabled in backend depending on DPMS
 state

Whenever the dpms of an output changes we update the outputs enabled
state in the AbstractBackend.
---
 backends/drm/drm_backend.cpp | 14 ++++++++++++++
 backends/drm/drm_backend.h   |  7 +++++++
 2 files changed, 21 insertions(+)

diff --git a/backends/drm/drm_backend.cpp b/backends/drm/drm_backend.cpp
index 02b93b2b68..a1b1607cdb 100644
--- a/backends/drm/drm_backend.cpp
+++ b/backends/drm/drm_backend.cpp
@@ -276,6 +276,7 @@ void DrmBackend::queryResources()
             continue;
         }
         DrmOutput *drmOutput = new DrmOutput(this);
+        connect(drmOutput, &DrmOutput::dpmsChanged, this, &DrmBackend::outputDpmsChanged);
         drmOutput->m_crtcId = crtcId;
         if (crtc->mode_valid) {
             drmOutput->m_mode = crtc->mode;
@@ -502,6 +503,18 @@ void DrmBackend::bufferDestroyed(DrmBuffer *b)
     m_buffers.removeAll(b);
 }
 
+void DrmBackend::outputDpmsChanged()
+{
+    if (m_outputs.isEmpty()) {
+        return;
+    }
+    bool enabled = false;
+    for (auto it = m_outputs.constBegin(); it != m_outputs.constEnd(); ++it) {
+        enabled = enabled || (*it)->isDpmsEnabled();
+    }
+    setOutputsEnabled(enabled);
+}
+
 DrmOutput::DrmOutput(DrmBackend *backend)
     : QObject()
     , m_backend(backend)
@@ -896,6 +909,7 @@ void DrmOutput::setDpms(DrmOutput::DpmsMode mode)
         return;
     }
     m_dpmsMode = mode;
+    emit dpmsChanged();
     if (m_dpmsMode != DpmsMode::On) {
         connect(input(), &InputRedirection::globalPointerChanged, this, &DrmOutput::reenableDpms);
         connect(input(), &InputRedirection::pointerButtonStateChanged, this, &DrmOutput::reenableDpms);
diff --git a/backends/drm/drm_backend.h b/backends/drm/drm_backend.h
index 6c3f27bee3..c4b9472327 100644
--- a/backends/drm/drm_backend.h
+++ b/backends/drm/drm_backend.h
@@ -106,6 +106,7 @@ private:
     void initCursor();
     quint32 findCrtc(drmModeRes *res, drmModeConnector *connector, bool *ok = nullptr);
     bool crtcIsUsed(quint32 crtc);
+    void outputDpmsChanged();
     DrmOutput *findOutput(quint32 connector);
     QScopedPointer<Udev> m_udev;
     QScopedPointer<UdevMonitor> m_udevMonitor;
@@ -150,6 +151,12 @@ public:
         Off = DRM_MODE_DPMS_OFF
     };
     void setDpms(DpmsMode mode);
+    bool isDpmsEnabled() const {
+        return m_dpmsMode == DpmsMode::On;
+    }
+
+Q_SIGNALS:
+    void dpmsChanged();
 
 private:
     friend class DrmBackend;