xref: /OK3568_Linux_fs/buildroot/package/weston/0029-backend-drm-Support-controlling-compositor-dynamical.patch (revision 4882a59341e53eb6f0b4789bf948001014eff981)

From 46759d631e3052a584cf7e5748ea8fe08f3accfa Mon Sep 17 00:00:00 2001
From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Fri, 3 Jul 2020 12:37:37 +0800
Subject: [PATCH 29/95] backend-drm: Support controlling compositor dynamically

Use config file to control compositor's state.

Default config file is "/tmp/.weston_drm.conf", can override with
"WESTON_DRM_CONFIG" environment.

Supported configs format is "compositor:<key>:<value>", for
example:
echo "compositor:state:sleep" > /tmp/.weston_drm.conf
echo "compositor:state:block" > /tmp/.weston_drm.conf
echo "compositor:state:freeze" > /tmp/.weston_drm.conf
echo "compositor:state:off" > /tmp/.weston_drm.conf
echo "compositor:state:on" > /tmp/.weston_drm.conf
echo "compositor:hotplug:off" > /tmp/.weston_drm.conf
echo "compositor:hotplug:on" > /tmp/.weston_drm.conf
echo "compositor:hotplug:force" > /tmp/.weston_drm.conf

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---
 libweston/backend-drm/drm.c | 39 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/libweston/backend-drm/drm.c b/libweston/backend-drm/drm.c
index 6c7a567..2dc38b5 100644
--- a/libweston/backend-drm/drm.c
+++ b/libweston/backend-drm/drm.c
@@ -3821,6 +3821,39 @@ config_handle_output(struct drm_backend *b, const char *name,
 	}
 }

+static void
+config_handle_compositor(struct drm_backend *b, const char *key,
+			 const char *value)
+{
+	if (!strncmp(key, "state", strlen("state"))) {
+		if (!strncmp(value, "sleep", strlen("sleep"))) {
+			weston_compositor_sleep(b->compositor);
+		} else if (!strncmp(value, "block", strlen("block"))) {
+			udev_input_disable(&b->input);
+		} else if (!strncmp(value, "freeze", strlen("freeze"))) {
+			udev_input_disable(&b->input);
+			weston_compositor_offscreen(b->compositor);
+		} else if (!strncmp(value, "off", strlen("off"))) {
+			udev_input_disable(&b->input);
+			weston_compositor_sleep(b->compositor);
+		} else {
+			weston_compositor_wake(b->compositor);
+			weston_compositor_damage_all(b->compositor);
+
+			if (b->input.suspended)
+				udev_input_enable(&b->input);
+		}
+	} else if (!strncmp(key, "hotplug", strlen("hotplug"))) {
+		if (!strncmp(value, "off", strlen("off")))
+			wl_event_source_fd_update(b->udev_drm_source, 0);
+		else if (!strncmp(value, "on", strlen("on")))
+			wl_event_source_fd_update(b->udev_drm_source,
+						  WL_EVENT_READABLE);
+		else if (!strncmp(value, "force", strlen("force")))
+			hotplug_timer_handler(b);
+	}
+}
+
 static int
 config_timer_handler(void *data)
 {
@@ -3852,7 +3885,9 @@ config_timer_handler(void *data)

 	/**
 	 * Parse configs, formated with <type>:<key>:<value>
-	 * For example: "output:all:rotate90"
+	 * For example:
+	 *	output:all:rotate90
+	 *	compositor:state:off
 	 */
 	while (3 == fscanf(conf_fp,
 			   "%" STR(MAX_CONF_LEN) "[^:]:"
@@ -3860,6 +3895,8 @@ config_timer_handler(void *data)
 			   "%" STR(MAX_CONF_LEN) "[^\n]%*c", type, key, value)) {
 		if (!strcmp(type, "output"))
 			config_handle_output(b, key, value);
+		else if (!strcmp(type, "compositor"))
+			config_handle_compositor(b, key, value);
 	}

 	fclose(conf_fp);
--
2.20.1