compositor: Enable HDCP for an output using weston.ini

This patch enables a user to opt for HDCP per output, by writing into
the output section of weston.ini configuration file. HDCP is always
enabled by default for the outputs.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>

compositor/main.c

@@ -1232,6 +1232,18 @@ wet_output_set_transform(struct weston_output *output,
 	weston_output_set_transform(output, transform);
 }
 
+static void
+allow_content_protection(struct weston_output *output,
+			struct weston_config_section *section)
+{
+	int allow_hdcp = 1;
+
+	if (section)
+		weston_config_section_get_bool(section, "allow_hdcp", &allow_hdcp, 1);
+
+	weston_output_allow_protection(output, allow_hdcp);
+}
+
 static int
 wet_configure_windowed_output_from_config(struct weston_output *output,
 					  struct wet_output_config *defaults)
@@ -1269,6 +1281,8 @@ wet_configure_windowed_output_from_config(struct weston_output *output,
 		free(mode);
 	}
 
+	allow_content_protection(output, section);
+
 	if (parsed_options->width)
 		width = parsed_options->width;
 
@@ -1720,6 +1734,8 @@ drm_backend_output_configure(struct weston_output *output,
 	api->set_seat(output, seat);
 	free(seat);
 
+	allow_content_protection(output, section);
+
 	return 0;
 }
 

include/libweston/libweston.h

@@ -299,6 +299,7 @@ struct weston_output {
 
 	enum weston_hdcp_protection desired_protection;
 	enum weston_hdcp_protection current_protection;
+	bool allow_protection;
 
 	void (*start_repaint_loop)(struct weston_output *output);
 	int (*repaint)(struct weston_output *output,
@@ -2458,6 +2459,10 @@ weston_head_from_resource(struct wl_resource *resource);
 struct weston_head *
 weston_output_get_first_head(struct weston_output *output);
 
+void
+weston_output_allow_protection(struct weston_output *output,
+			       bool allow_protection);
+
 int
 weston_compositor_enable_touch_calibrator(struct weston_compositor *compositor,
 				weston_touch_calibration_save_func save);

libweston/compositor.c

@@ -6036,6 +6036,7 @@ weston_output_init(struct weston_output *output,
 	wl_signal_init(&output->user_destroy_signal);
 	output->enabled = false;
 	output->desired_protection = WESTON_HDCP_DISABLE;
+	output->allow_protection = true;
 
 	wl_list_init(&output->head_list);
 
@@ -6489,6 +6490,23 @@ weston_output_get_first_head(struct weston_output *output)
 			    struct weston_head, output_link);
 }
 
+/** Allow/Disallow content-protection support for an output
+ *
+ * This function sets the allow_protection member for an output. Setting of
+ * this field will allow the compositor to attempt content-protection for this
+ * output, for a backend that supports the content-protection protocol.
+ *
+ * \param output The weston_output for whom the content-protection is to be
+ * allowed.
+ * \param allow_protection The bool value which is to be set.
+ */
+WL_EXPORT void
+weston_output_allow_protection(struct weston_output *output,
+			       bool allow_protection)
+{
+	output->allow_protection = allow_protection;
+}
+
 static void
 xdg_output_unlist(struct wl_resource *resource)
 {

man/weston.ini.man

@@ -545,6 +545,15 @@ multiheaded environment with a single compositor for multiple output and input
 configurations. The default seat is called "default" and will always be
 present. This seat can be constrained like any other.
 .RE
+.TP 7
+.BI "allow_hdcp=" true
+Allows HDCP support for this output. If set to true, HDCP can be tried for the
+content-protection, provided by the backends, on this output.
+The content-protection can actually be realized, only if the hardwares (source
+and sink) support HDCP, and the backend has the implementation of
+content-protection protocol. By default, HDCP support is always allowed for an
+output.
+.RE
 .SH "INPUT-METHOD SECTION"
 .TP 7
 .BI "path=" "@weston_libexecdir@/weston-keyboard"