From 3d3668a3893593c97591516ee0ff864f453fa75e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
Date: Tue, 4 Aug 2020 19:03:17 +0200
Subject: [PATCH] kms/device: Add functions to find connector and crtc in
 devices

Hotplug events may contain CRTC or CONNECTOR ids to notify a property
change to just one owner, so we need to find its parent device.

Also we may want to update properties directly without having to go through
all the devices, so expose a simple way to find them.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1964>
---
 src/backends/native/meta-kms-device-private.h |  6 +++
 src/backends/native/meta-kms-device.c         | 44 +++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/src/backends/native/meta-kms-device-private.h b/src/backends/native/meta-kms-device-private.h
index 831f7820a..1079741e0 100644
--- a/src/backends/native/meta-kms-device-private.h
+++ b/src/backends/native/meta-kms-device-private.h
@@ -34,4 +34,10 @@ void meta_kms_device_add_fake_plane_in_impl (MetaKmsDevice    *device,
                                              MetaKmsPlaneType  plane_type,
                                              MetaKmsCrtc      *crtc);
 
+MetaKmsCrtc * meta_kms_device_find_crtc_in_impl (MetaKmsDevice *device,
+                                                 uint32_t       crtc_id);
+
+MetaKmsConnector * meta_kms_device_find_connector_in_impl (MetaKmsDevice *device,
+                                                           uint32_t       connector_id);
+
 #endif /* META_KMS_DEVICE_PRIVATE_H */
diff --git a/src/backends/native/meta-kms-device.c b/src/backends/native/meta-kms-device.c
index beb2360e6..6085654ba 100644
--- a/src/backends/native/meta-kms-device.c
+++ b/src/backends/native/meta-kms-device.c
@@ -20,6 +20,8 @@
 
 #include "config.h"
 
+#include "backends/native/meta-kms-connector.h"
+#include "backends/native/meta-kms-crtc.h"
 #include "backends/native/meta-kms-device-private.h"
 #include "backends/native/meta-kms-device.h"
 
@@ -133,6 +135,48 @@ meta_kms_device_get_connectors (MetaKmsDevice *device)
   return device->connectors;
 }
 
+MetaKmsCrtc *
+meta_kms_device_find_crtc_in_impl (MetaKmsDevice *device,
+                                   uint32_t       crtc_id)
+{
+  MetaKmsImplDevice *impl_device = meta_kms_device_get_impl_device (device);
+  GList *l;
+
+  meta_assert_in_kms_impl (device->kms);
+  meta_assert_is_waiting_for_kms_impl_task (device->kms);
+
+  for (l = meta_kms_impl_device_peek_crtcs (impl_device); l; l = l->next)
+    {
+      MetaKmsCrtc *crtc = META_KMS_CRTC (l->data);
+
+      if (meta_kms_crtc_get_id (crtc) == crtc_id)
+        return crtc;
+    }
+
+  return NULL;
+}
+
+MetaKmsConnector *
+meta_kms_device_find_connector_in_impl (MetaKmsDevice *device,
+                                        uint32_t       connector_id)
+{
+  MetaKmsImplDevice *impl_device = meta_kms_device_get_impl_device (device);
+  GList *l;
+
+  meta_assert_in_kms_impl (device->kms);
+  meta_assert_is_waiting_for_kms_impl_task (device->kms);
+
+  for (l = meta_kms_impl_device_peek_connectors (impl_device); l; l = l->next)
+    {
+      MetaKmsConnector *connector = META_KMS_CONNECTOR (l->data);
+
+      if (meta_kms_connector_get_id (connector) == connector_id)
+        return connector;
+    }
+
+  return NULL;
+}
+
 GList *
 meta_kms_device_get_crtcs (MetaKmsDevice *device)
 {