path: root/recipes-graphics/wayland/weston/0001-Add-virtual-output-support.patch

From c0bb07ba816524d69de22c22fcb7f7b9b95fbb11 Mon Sep 17 00:00:00 2001
From: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Date: Thu, 27 Apr 2017 16:47:00 +0900
Subject: [PATCH 1/3] Add virtual output support

Following patch ported to Weston 1.11 with minor updates
----------
Author: Grigory Kletsko <grigory.kletsko@cogentembedded.com>
Date:   Wed Nov 2 17:14:43 2016 +0300

To enable virtual output set "virtual" property in core section
to desirable number of virtual outputs. Then add settings to
each virtual output in output sections. Name of the outputs
will be virtual1, virtual2... etc.
------------
---
 src/compositor-drm.c | 310 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 310 insertions(+)

diff --git a/src/compositor-drm.c b/src/compositor-drm.c
index abc9408..fc5a2ff 100644
--- a/src/compositor-drm.c
+++ b/src/compositor-drm.c
@@ -199,6 +199,11 @@ struct drm_output {
 
 	struct vaapi_recorder *recorder;
 	struct wl_listener recorder_frame_listener;
+
+	/* not real output device */
+	int virtual;
+	/* Timer for updating frame */
+	struct wl_event_source *virtual_finish_frame_timer;
 };
 
 /*
@@ -1474,6 +1479,33 @@ drm_output_destroy(struct weston_output *output_base)
 	free(output);
 }
 
+static void
+virtual_output_destroy(struct weston_output *output_base)
+{
+	struct drm_output *output = (struct drm_output *) output_base;
+	struct drm_backend *c =
+		(struct drm_backend *) output->base.compositor;
+
+	c->crtc_allocator &= ~(1 << output->crtc_id);
+	c->connector_allocator &= ~(1 << output->connector_id);
+
+	if (c->use_pixman) {
+		drm_output_fini_pixman(output);
+	} else {
+		gl_renderer->output_destroy(output_base);
+		gbm_surface_destroy(output->gbm_surface);
+	}
+
+	weston_plane_release(&output->fb_plane);
+	weston_plane_release(&output->cursor_plane);
+
+	weston_output_destroy(&output->base);
+
+
+	wl_event_source_remove(output->virtual_finish_frame_timer);
+	free(output);
+}
+
 /**
  * Find the closest-matching mode for a given target
  *
@@ -2649,6 +2681,270 @@ err_free:
 }
 
 static void
+virtual_output_start_repaint_loop(struct weston_output *output)
+{
+	struct timespec now;
+
+	weston_compositor_read_presentation_clock(output->compositor, &now);
+	weston_output_finish_frame(output, &now, WP_PRESENTATION_FEEDBACK_INVALID);
+}
+
+
+static int
+virtual_output_repaint(struct weston_output *output_base,
+		   pixman_region32_t *damage)
+{
+	struct drm_output *output = (struct drm_output *) output_base;
+	struct timespec ts;
+	uint32_t msec_next;
+	uint32_t msec_current;
+
+	msec_next = (output->base.frame_time + 1000000UL / output->base.current_mode->refresh) ;
+
+	if (output->destroy_pending)
+		return -1;
+
+	if (!output->next)
+		drm_output_render(output, damage);
+	if (!output->next)
+		return -1;
+
+	drm_output_set_cursor(output);
+
+	output->page_flip_pending = 1;
+
+	weston_compositor_read_presentation_clock(output_base->compositor, &ts);
+
+	msec_current = ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+
+	/*
+	 * If we somehow late with updating frame, then fireup timer immediately (1 msec)
+	 */
+	wl_event_source_timer_update(output->virtual_finish_frame_timer, (msec_next > msec_current)  ?
+				     msec_next - msec_current : 1);
+
+	return 0;
+}
+
+static int
+virtual_finish_frame_handler(void *data)
+{
+	struct drm_output *output = (struct drm_output *) data;
+	struct timespec ts;
+
+	/* We don't set page_flip_pending on start_repaint_loop, in that case
+	 * we just want to page flip to the current buffer to get an accurate
+	 * timestamp */
+	if (output->page_flip_pending) {
+		drm_output_release_fb(output, output->current);
+		output->current = output->next;
+		output->next = NULL;
+	}
+
+	output->page_flip_pending = 0;
+
+	if (output->destroy_pending)
+		drm_output_destroy(&output->base);
+	else if (!output->vblank_pending) {
+		weston_compositor_read_presentation_clock(output->base.compositor, &ts);
+
+		weston_output_finish_frame(&output->base, &ts,
+			WP_PRESENTATION_FEEDBACK_INVALID);
+
+		/* We can't call this from frame_notify, because the output's
+		 * repaint needed flag is cleared just after that */
+		if (output->recorder)
+			weston_output_schedule_repaint(&output->base);
+	}
+
+	return 1;
+}
+
+/*
+ * Virtual output connector that could be used for simulating output
+ * device for clients and/or streaming of video
+ */
+static int
+create_output_for_virtual_connector(struct drm_backend *b,
+				    int x, int y, struct udev_device *drm_device)
+{
+	struct wl_event_loop *loop;
+	static int virtual_id = 1; /* as other outputs numbered */
+	struct drm_output *output;
+	struct drm_mode *drm_mode, *next, *current;
+	struct weston_mode *m;
+	struct weston_config_section *section;
+	int width, height, scale, fps;
+	int recorded_output;
+	char name[32], *s;
+	enum weston_drm_backend_output_mode mode;
+	struct weston_drm_backend_output_config config = {{ 0 }};
+	uint32_t transform;
+	int valid_mode;
+	drmModeModeInfo crtc_mode;
+
+	output = zalloc(sizeof *output);
+	if (output == NULL)
+		return -1;
+
+	output->base.subpixel = WL_OUTPUT_SUBPIXEL_NONE; //drm_subpixel_to_wayland(connector->subpixel);
+	output->base.make = "CogentEmbedded,Inc";
+	output->base.serial_number = "";
+	wl_list_init(&output->base.mode_list);
+
+	snprintf(name, 32, "virtual%d", virtual_id++);
+	output->base.name = strdup(name);
+
+	section = weston_config_get_section(b->compositor->config, "output", "name",
+					    output->base.name);
+
+	weston_config_section_get_bool(section, "recorder", &recorded_output, 0);
+	if (recorded_output) {
+		char model[64];
+		char *ip;
+		int port;
+
+		weston_config_section_get_string(section, "ip", &ip, "<nil>");
+		weston_config_section_get_int(section, "port", &port, -1);
+		snprintf(model, 64, "Virtual RTP %s:%d", ip, port);
+		output->base.model = strdup(model);
+	} else {
+		output->base.model = "Virtual Display";
+	}
+
+	mode = b->configure_output(b->compositor, b->use_current_mode,
+				   output->base.name, &config);
+
+	if (mode == WESTON_DRM_BACKEND_OUTPUT_PREFERRED) {
+		if (config.modeline && sscanf(config.modeline, "%dx%d@%d", &width, &height, &fps) >= 3)
+			valid_mode = 1;
+	}
+
+	weston_config_section_get_int(section, "scale", &scale, 1);
+	weston_config_section_get_string(section, "transform", &s, "normal");
+	if (weston_parse_transform(s, &transform) < 0)
+		weston_log("Invalid transform \"%s\" for output %s\n",
+			   s, output->base.name);
+	free(s);
+
+	if (parse_gbm_format(config.gbm_format, b->gbm_format, &output->gbm_format) == -1)
+		output->gbm_format = b->gbm_format;
+
+	weston_config_section_get_string(section, "seat", &s, "");
+	setup_output_seat_constraint(b, &output->base, s);
+	free(s);
+
+	output->pipe = 0;
+	b->crtc_allocator |= (1 << output->crtc_id);
+	output->connector_id = 0;
+	b->connector_allocator |= (1 << output->connector_id);
+
+	/* this is virtual output */
+	output->virtual = 1;
+
+
+	output->original_crtc = NULL;
+	output->dpms_prop = NULL;
+
+	/* set static mode */
+	if (valid_mode) {
+		/* TODO: calculate proper mode settings to get desirable framerate */
+		drmModeModeInfo static_drm_mode = {
+			width * height * fps,
+			width, 0, 0, width, width,
+			height, 0, 0, height, height,
+			fps * 1000,
+			0, //flags
+			0, //type
+			"virtual"
+		};
+
+		drm_mode = drm_output_add_mode(output, &static_drm_mode);
+		if (!drm_mode)
+			goto err_free;
+
+		drm_mode->base.refresh = fps * 1000;
+	}
+
+	if (mode == WESTON_DRM_BACKEND_OUTPUT_OFF) {
+		weston_log("Disabling output %s\n", output->base.name);
+		drmModeSetCrtc(b->drm.fd, output->crtc_id,
+			       0, 0, 0, 0, 0, NULL);
+		goto err_free;
+	}
+
+	current = drm_output_choose_initial_mode(b, output, mode, &config,
+						 &crtc_mode);
+	if (!current)
+		goto err_free;
+	output->base.current_mode = &current->base;
+	output->base.current_mode->flags |= WL_OUTPUT_MODE_CURRENT;
+
+	weston_output_init(&output->base, b->compositor, x, y,
+			   100, 100 * height / width, /* FIXME: calculate proper mm_width and mm_height */
+			   config.base.transform, config.base.scale);
+	if (b->use_pixman) {
+		if (drm_output_init_pixman(output, b) < 0) {
+			weston_log("Failed to init output pixman state\n");
+			goto err_output;
+		}
+	} else if (drm_output_init_egl(output, b) < 0) {
+		weston_log("Failed to init output gl state\n");
+		goto err_output;
+	}
+
+	output->backlight = NULL;
+
+	weston_compositor_add_output(b->compositor, &output->base);
+
+	output->base.connection_internal = 1;
+
+	loop = wl_display_get_event_loop(b->compositor->wl_display);
+	output->virtual_finish_frame_timer = wl_event_loop_add_timer(loop, virtual_finish_frame_handler, output);
+
+	output->base.start_repaint_loop = virtual_output_start_repaint_loop;
+	output->base.repaint = virtual_output_repaint;
+	output->base.destroy = virtual_output_destroy;
+	output->base.assign_planes = NULL;
+	output->base.set_backlight = NULL;
+	output->base.set_dpms = NULL;
+	output->base.switch_mode = drm_output_switch_mode;
+
+	output->base.gamma_size = 0;
+	output->base.set_gamma = drm_output_set_gamma;
+
+	weston_plane_init(&output->cursor_plane, b->compositor, 0, 0);
+	weston_plane_init(&output->fb_plane, b->compositor, 0, 0);
+
+	weston_compositor_stack_plane(b->compositor, &output->cursor_plane, NULL);
+	weston_compositor_stack_plane(b->compositor, &output->fb_plane,
+				      &b->compositor->primary_plane);
+
+	weston_log("Output %s, ()\n",
+		   output->base.name);
+	wl_list_for_each(m, &output->base.mode_list, link)
+		weston_log_continue(STAMP_SPACE "mode %dx%d@%.1f\n",
+				    m->width, m->height, m->refresh / 1000.0);
+
+	return 0;
+
+err_output:
+	weston_output_destroy(&output->base);
+err_free:
+	wl_list_for_each_safe(drm_mode, next, &output->base.mode_list,
+							base.link) {
+		wl_list_remove(&drm_mode->base.link);
+		free(drm_mode);
+	}
+
+	b->crtc_allocator &= ~(1 << output->crtc_id);
+	b->connector_allocator &= ~(1 << output->connector_id);
+	free(output);
+
+	return -1;
+}
+
+static void
 create_sprites(struct drm_backend *b)
 {
 	struct drm_sprite *sprite;
@@ -2721,10 +3017,12 @@ static int
 create_outputs(struct drm_backend *b, uint32_t option_connector,
 	       struct udev_device *drm_device)
 {
+	struct weston_config_section *section;
 	drmModeConnector *connector;
 	drmModeRes *resources;
 	int i;
 	int x = 0, y = 0;
+	int virtual;
 
 	resources = drmModeGetResources(b->drm.fd);
 	if (!resources) {
@@ -2770,6 +3068,18 @@ create_outputs(struct drm_backend *b, uint32_t option_connector,
 		drmModeFreeConnector(connector);
 	}
 
+	section = weston_config_get_section(b->compositor->config, "core", NULL, NULL);
+	weston_config_section_get_int(section, "virtual", &virtual, 0);
+
+	for (i = 0; i < virtual; i++) {
+		if (create_output_for_virtual_connector(b, x, y,
+							drm_device) < 0)
+			continue;
+		x += container_of(b->compositor->output_list.prev,
+				  struct weston_output,
+				  link)->width;
+	}
+
 	if (wl_list_empty(&b->compositor->output_list)) {
 		weston_log("No currently active connector found.\n");
 		drmModeFreeResources(resources);
-- 
1.9.1