compositor-drm: Move KMS API use to separate file

Create a new file which handles most of the actual KMS API use. This
covers the property handling (in which we map between KMS properties and
our internal representations), as well as actually applying state
through atomic modesetting or the legacy SetCrtc/PageFlip/DPMS APIs.

Signed-off-by: Daniel Stone <daniels@collabora.com>

libweston/backend-drm/drm-internal.h

@@ -502,6 +502,12 @@ to_drm_mode(struct weston_mode *base)
 	return container_of(base, struct drm_mode, base);
 }
 
+struct drm_output *
+drm_output_find_by_crtc(struct drm_backend *b, uint32_t crtc_id);
+
+struct drm_head *
+drm_head_find_by_connector(struct drm_backend *backend, uint32_t connector_id);
+
 int
 drm_mode_ensure_blob(struct drm_backend *backend, struct drm_mode *mode);
 
@@ -523,7 +529,56 @@ drm_output_set_mode(struct weston_output *base,
 		    enum weston_drm_backend_output_mode mode,
 		    const char *modeline);
 
+void
+drm_property_info_populate(struct drm_backend *b,
+		           const struct drm_property_info *src,
+			   struct drm_property_info *info,
+			   unsigned int num_infos,
+			   drmModeObjectProperties *props);
 uint64_t
 drm_property_get_value(struct drm_property_info *info,
 		       const drmModeObjectProperties *props,
 		       uint64_t def);
+int
+drm_plane_populate_formats(struct drm_plane *plane, const drmModePlane *kplane,
+			   const drmModeObjectProperties *props);
+void
+drm_property_info_free(struct drm_property_info *info, int num_props);
+
+extern struct drm_property_enum_info plane_type_enums[];
+extern const struct drm_property_info plane_props[];
+extern struct drm_property_enum_info dpms_state_enums[];
+extern const struct drm_property_info connector_props[];
+extern const struct drm_property_info crtc_props[];
+
+int
+init_kms_caps(struct drm_backend *b);
+
+int
+drm_pending_state_test(struct drm_pending_state *pending_state);
+int
+drm_pending_state_apply(struct drm_pending_state *pending_state);
+int
+drm_pending_state_apply_sync(struct drm_pending_state *pending_state);
+
+void
+drm_output_set_gamma(struct weston_output *output_base,
+		     uint16_t size, uint16_t *r, uint16_t *g, uint16_t *b);
+
+void
+drm_output_update_msc(struct drm_output *output, unsigned int seq);
+void
+drm_output_update_complete(struct drm_output *output, uint32_t flags,
+			   unsigned int sec, unsigned int usec);
+int
+on_drm_input(int fd, uint32_t mask, void *data);
+
+struct drm_plane_state *
+drm_output_state_get_existing_plane(struct drm_output_state *state_output,
+				    struct drm_plane *plane);
+void
+drm_plane_state_free(struct drm_plane_state *state, bool force);
+void
+drm_output_state_free(struct drm_output_state *state);
+void
+drm_pending_state_free(struct drm_pending_state *pending_state);

libweston/backend-drm/meson.build

@@ -22,6 +22,7 @@ config_h.set('BUILD_DRM_COMPOSITOR', '1')
 srcs_drm = [
 	'drm.c',
 	'modes.c',
+	'kms.c',
 	linux_dmabuf_unstable_v1_protocol_c,
 	linux_dmabuf_unstable_v1_server_protocol_h,
 	presentation_time_server_protocol_h,