Commit 4f64ff8b authored by Ankit Nautiyal's avatar Ankit Nautiyal
Browse files

libweston: Compute current protection for weston_output and weston_head

The actual protection status for a given weston_head depends upon the
corresponding drm_head's connector HDCP properties. On the other hand,
the actual protection for a weston_output is the minimum of the
protection status of its attached heads.
As a head's protection changes, the current protection of the output
to which the head is attached is recomputed.

This patch adds the support to keep track of the current
content-protection for heads and the outputs.
Signed-off-by: Ankit Nautiyal's avatarAnkit Nautiyal <>
parent 2690a770
......@@ -215,6 +215,9 @@ struct weston_head {
char *name; /**< head name, e.g. connector name */
bool connected; /**< is physically connected */
bool non_desktop; /**< non-desktop display, e.g. HMD */
/** Current content protection status */
enum weston_hdcp_protection current_protection;
/** Represents an output
......@@ -292,6 +295,7 @@ struct weston_output {
struct wl_list head_list; /**< List of driven weston_heads */
enum weston_hdcp_protection desired_protection;
enum weston_hdcp_protection current_protection;
void (*start_repaint_loop)(struct weston_output *output);
int (*repaint)(struct weston_output *output,
......@@ -2355,6 +2359,10 @@ struct wl_listener *
weston_head_get_destroy_listener(struct weston_head *head,
wl_notify_func_t notify);
weston_head_set_content_protection_status(struct weston_head *head,
enum weston_hdcp_protection status);
struct weston_head *
weston_compositor_iterate_heads(struct weston_compositor *compositor,
struct weston_head *iter);
......@@ -4769,6 +4769,7 @@ weston_head_init(struct weston_head *head, const char *name)
head->name = strdup(name);
head->current_protection = WESTON_HDCP_DISABLE;
/** Send output heads changed signal
......@@ -5271,6 +5272,38 @@ weston_head_set_connection_status(struct weston_head *head, bool connected)
static void
weston_output_compute_protection(struct weston_output *output)
struct weston_head *head;
enum weston_hdcp_protection op_protection;
bool op_protection_valid = false;
wl_list_for_each(head, &output->head_list, output_link) {
if (!op_protection_valid) {
op_protection = head->current_protection;
op_protection_valid = true;
if (head->current_protection < op_protection)
op_protection = head->current_protection;
if (!op_protection_valid)
op_protection = WESTON_HDCP_DISABLE;
if (output->current_protection != op_protection)
output->current_protection = op_protection;
weston_head_set_content_protection_status(struct weston_head *head,
enum weston_hdcp_protection status)
head->current_protection = status;
if (head->output)
/** Is the head currently connected?
* \param head The head to query.
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