tests/kms/device: Add mode setting test

Checks that the relevant device state is correct after mode setting.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2159>

src/backends/native/meta-kms-crtc.h

@@ -63,12 +63,15 @@ G_DECLARE_FINAL_TYPE (MetaKmsCrtc, meta_kms_crtc,
 META_EXPORT_TEST
 MetaKmsDevice * meta_kms_crtc_get_device (MetaKmsCrtc *crtc);
 
+META_EXPORT_TEST
 const MetaKmsCrtcState * meta_kms_crtc_get_current_state (MetaKmsCrtc *crtc);
 
+META_EXPORT_TEST
 uint32_t meta_kms_crtc_get_id (MetaKmsCrtc *crtc);
 
 int meta_kms_crtc_get_idx (MetaKmsCrtc *crtc);
 
+META_EXPORT_TEST
 gboolean meta_kms_crtc_is_active (MetaKmsCrtc *crtc);
 
 void meta_kms_crtc_gamma_free (MetaKmsCrtcGamma *gamma);

src/backends/native/meta-kms-device.h

@@ -72,6 +72,7 @@ MetaKmsPlane * meta_kms_device_get_cursor_plane_for (MetaKmsDevice *device,
 
 GList * meta_kms_device_get_fallback_modes (MetaKmsDevice *device);
 
+META_EXPORT_TEST
 MetaKmsFeedback * meta_kms_device_process_update_sync (MetaKmsDevice     *device,
                                                        MetaKmsUpdate     *update,
                                                        MetaKmsUpdateFlag  flags);

src/tests/meson.build

@@ -300,6 +300,8 @@ if have_native_tests
 
   native_kms_device_tests = executable('mutter-native-kms-device',
     sources: [
+      'meta-kms-test-utils.c',
+      'meta-kms-test-utils.h',
       'native-kms-device.c',
     ],
     include_directories: tests_includes,

src/tests/native-kms-device.c

@@ -25,8 +25,10 @@
 #include "backends/native/meta-kms-crtc.h"
 #include "backends/native/meta-kms-device.h"
 #include "backends/native/meta-kms-plane.h"
+#include "backends/native/meta-kms-update.h"
 #include "backends/native/meta-kms.h"
 #include "meta-test/meta-context-test.h"
+#include "tests/meta-kms-test-utils.h"
 
 static MetaContext *test_context;
 
@@ -86,11 +88,66 @@ meta_test_kms_device_sanity (void)
                    META_KMS_PLANE_TYPE_CURSOR);
 }
 
+static void
+meta_test_kms_device_mode_set (void)
+{
+  MetaKmsDevice *device;
+  MetaKmsUpdate *update;
+  MetaKmsCrtc *crtc;
+  MetaKmsConnector *connector;
+  MetaKmsMode *mode;
+  MetaKmsPlane *primary_plane;
+  g_autoptr (MetaDrmBuffer) primary_buffer = NULL;
+  const MetaKmsCrtcState *crtc_state;
+  const MetaKmsConnectorState *connector_state;
+  MetaRectangle mode_rect;
+
+  device = meta_get_test_kms_device (test_context);
+  crtc = meta_get_test_kms_crtc (device);
+  connector = meta_get_test_kms_connector (device);
+  mode = meta_kms_connector_get_preferred_mode (connector);
+
+  update = meta_kms_update_new (device);
+
+  meta_kms_update_mode_set (update, crtc,
+                            g_list_append (NULL, connector),
+                            mode);
+
+  primary_buffer = meta_create_test_mode_dumb_buffer (device, mode);
+
+  primary_plane = meta_kms_device_get_primary_plane_for (device, crtc);
+  meta_kms_update_assign_plane (update,
+                                crtc,
+                                primary_plane,
+                                primary_buffer,
+                                meta_get_mode_fixed_rect_16 (mode),
+                                meta_get_mode_rect (mode),
+                                META_KMS_ASSIGN_PLANE_FLAG_NONE);
+  meta_kms_device_process_update_sync (device, update,
+                                       META_KMS_UPDATE_FLAG_NONE);
+  meta_kms_update_free (update);
+
+  crtc_state = meta_kms_crtc_get_current_state (crtc);
+  g_assert_nonnull (crtc_state);
+  g_assert_true (crtc_state->is_active);
+  g_assert_true (crtc_state->is_drm_mode_valid);
+  mode_rect = meta_get_mode_rect (mode);
+  g_assert (meta_rectangle_equal (&crtc_state->rect, &mode_rect));
+
+  connector_state = meta_kms_connector_get_current_state (connector);
+  g_assert_nonnull (connector_state);
+  g_assert_cmpuint (connector_state->current_crtc_id,
+                    ==,
+                    meta_kms_crtc_get_id (crtc));
+}
+
 static void
 init_tests (void)
 {
   g_test_add_func ("/backends/native/kms/device/sanity",
                    meta_test_kms_device_sanity);
+  g_test_add_func ("/backends/native/kms/device/mode-set",
+                   meta_test_kms_device_mode_set);
 }
 
 int