[mutter] kms/crtc: Find MODE_ID and ACTIVE property IDs

[Marge Bot <marge-bot src gnome org>]

commit 11966dc6cb1199a06923f683dad15b8a9578812f
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Jun 4 17:19:26 2020 +0200

    kms/crtc: Find MODE_ID and ACTIVE property IDs
    
    Will be used by the atomic KMS backend.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1488>

 src/backends/native/meta-kms-crtc-private.h | 13 ++++++
 src/backends/native/meta-kms-crtc.c         | 61 +++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)
---
diff --git a/src/backends/native/meta-kms-crtc-private.h b/src/backends/native/meta-kms-crtc-private.h
index f9a3a6e0ae..bbf014bf56 100644
--- a/src/backends/native/meta-kms-crtc-private.h
+++ b/src/backends/native/meta-kms-crtc-private.h
@@ -24,6 +24,13 @@
 
 #include "backends/native/meta-kms-types.h"
 
+typedef enum _MetaKmsCrtcProp
+{
+  META_KMS_CRTC_PROP_MODE_ID = 0,
+  META_KMS_CRTC_PROP_ACTIVE,
+  META_KMS_CRTC_N_PROPS
+} MetaKmsCrtcProp;
+
 MetaKmsCrtc * meta_kms_crtc_new (MetaKmsImplDevice *impl_device,
                                  drmModeCrtc       *drm_crtc,
                                  int                idx);
@@ -33,4 +40,10 @@ void meta_kms_crtc_update_state (MetaKmsCrtc *crtc);
 void meta_kms_crtc_predict_state (MetaKmsCrtc   *crtc,
                                   MetaKmsUpdate *update);
 
+uint32_t meta_kms_crtc_get_prop_id (MetaKmsCrtc     *crtc,
+                                    MetaKmsCrtcProp  prop);
+
+const char * meta_kms_crtc_get_prop_name (MetaKmsCrtc     *crtc,
+                                          MetaKmsCrtcProp  prop);
+
 #endif /* META_KMS_CRTC_PRIVATE_H */
diff --git a/src/backends/native/meta-kms-crtc.c b/src/backends/native/meta-kms-crtc.c
index 0040ee340e..2b04aa6271 100644
--- a/src/backends/native/meta-kms-crtc.c
+++ b/src/backends/native/meta-kms-crtc.c
@@ -27,6 +27,11 @@
 #include "backends/native/meta-kms-mode.h"
 #include "backends/native/meta-kms-update-private.h"
 
+typedef struct _MetaKmsCrtcPropTable
+{
+  MetaKmsProp props[META_KMS_CRTC_N_PROPS];
+} MetaKmsCrtcPropTable;
+
 struct _MetaKmsCrtc
 {
   GObject parent;
@@ -37,6 +42,8 @@ struct _MetaKmsCrtc
   int idx;
 
   MetaKmsCrtcState current_state;
+
+  MetaKmsCrtcPropTable prop_table;
 };
 
 G_DEFINE_TYPE (MetaKmsCrtc, meta_kms_crtc, G_TYPE_OBJECT)
@@ -76,6 +83,20 @@ meta_kms_crtc_get_idx (MetaKmsCrtc *crtc)
   return crtc->idx;
 }
 
+uint32_t
+meta_kms_crtc_get_prop_id (MetaKmsCrtc     *crtc,
+                           MetaKmsCrtcProp  prop)
+{
+  return crtc->prop_table.props[prop].prop_id;
+}
+
+const char *
+meta_kms_crtc_get_prop_name (MetaKmsCrtc     *crtc,
+                             MetaKmsCrtcProp  prop)
+{
+  return crtc->prop_table.props[prop].name;
+}
+
 static void
 read_gamma_state (MetaKmsCrtc       *crtc,
                   MetaKmsImplDevice *impl_device,
@@ -214,6 +235,44 @@ meta_kms_crtc_predict_state (MetaKmsCrtc   *crtc,
     }
 }
 
+static void
+init_proporties (MetaKmsCrtc       *crtc,
+                 MetaKmsImplDevice *impl_device,
+                 drmModeCrtc       *drm_crtc)
+{
+  MetaKmsCrtcPropTable *prop_table = &crtc->prop_table;
+  int fd;
+  drmModeObjectProperties *drm_props;
+
+  *prop_table = (MetaKmsCrtcPropTable) {
+    .props = {
+      [META_KMS_CRTC_PROP_MODE_ID] =
+        {
+          .name = "MODE_ID",
+          .type = DRM_MODE_PROP_BLOB,
+        },
+      [META_KMS_CRTC_PROP_ACTIVE] =
+        {
+          .name = "ACTIVE",
+          .type = DRM_MODE_PROP_RANGE,
+        },
+    }
+  };
+
+  fd = meta_kms_impl_device_get_fd (impl_device);
+  drm_props = drmModeObjectGetProperties (fd,
+                                          drm_crtc->crtc_id,
+                                          DRM_MODE_OBJECT_CRTC);
+
+  meta_kms_impl_device_init_prop_table (impl_device,
+                                        drm_props->props,
+                                        drm_props->count_props,
+                                        crtc->prop_table.props,
+                                        META_KMS_CRTC_N_PROPS);
+
+  drmModeFreeObjectProperties (drm_props);
+}
+
 MetaKmsCrtc *
 meta_kms_crtc_new (MetaKmsImplDevice *impl_device,
                    drmModeCrtc       *drm_crtc,
@@ -226,6 +285,8 @@ meta_kms_crtc_new (MetaKmsImplDevice *impl_device,
   crtc->id = drm_crtc->crtc_id;
   crtc->idx = idx;
 
+  init_proporties (crtc, impl_device, drm_crtc);
+
   meta_kms_crtc_read_state (crtc, impl_device, drm_crtc);
 
   return crtc;