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From 5c315a4e4ab5e0d0376508f72c6f8a8070251c3f Mon Sep 17 00:00:00 2001
From: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Date: Mon, 11 Apr 2022 18:43:06 +0900
Subject: [PATCH 2/3] Add DRM lease support
Add a command line option to use a DRM lease instead of a primary node for
output when using the DRM backend.
%% original patch: 0002-Add-DRM-lease-support.patch
---
compositor/drm-lease.c | 53 +++++++++++++++++++++++++++++++++++++
compositor/drm-lease.h | 40 ++++++++++++++++++++++++++++
compositor/main.c | 10 +++++++
compositor/meson.build | 5 ++++
libweston/backend-drm/drm.c | 1 +
meson_options.txt | 7 +++++
6 files changed, 116 insertions(+)
create mode 100644 compositor/drm-lease.c
create mode 100644 compositor/drm-lease.h
diff --git a/compositor/drm-lease.c b/compositor/drm-lease.c
new file mode 100644
index 0000000..fdb1f5e
--- /dev/null
+++ b/compositor/drm-lease.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright © 2021 IGEL Co., Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "drm-lease.h"
+
+#include <libweston/libweston.h>
+
+int get_drm_lease(struct dlm_lease **drm_lease, const char *drm_lease_name) {
+ if (!drm_lease_name)
+ return -1;
+
+ int drm_fd;
+ struct dlm_lease *lease = dlm_get_lease(drm_lease_name);
+ if (lease) {
+ drm_fd = dlm_lease_fd(lease);
+ if (drm_fd < 0)
+ dlm_release_lease(lease);
+ }
+ if (drm_fd < 0)
+ weston_log("Could not get DRM lease %s\n", drm_lease_name);
+
+ *drm_lease = lease;
+ return drm_fd;
+}
+
+void release_drm_lease(struct dlm_lease *lease) {
+ if (lease)
+ dlm_release_lease(lease);
+}
+
+
diff --git a/compositor/drm-lease.h b/compositor/drm-lease.h
new file mode 100644
index 0000000..a102e4c
--- /dev/null
+++ b/compositor/drm-lease.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright © 2021 IGEL Co., Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "config.h"
+
+#ifdef BUILD_DRM_LEASE_CLIENT
+#include <dlmclient.h>
+int get_drm_lease(struct dlm_lease **drm_lease, const char *drm_lease_name);
+void release_drm_lease(struct dlm_lease *drm_lease);
+#else
+struct dlm_lease;
+int get_drm_lease(struct dlm_lease **drm_lease, const char *drm_lease_name) {
+ return -1;
+}
+void release_drm_lease(struct dlm_lease *drm_lease) {
+}
+
+#endif
diff --git a/compositor/main.c b/compositor/main.c
index 322f2ff..419ad06 100644
--- a/compositor/main.c
+++ b/compositor/main.c
@@ -65,6 +65,7 @@
#include <libweston/weston-log.h>
#include <libweston/remoting-plugin.h>
#include <libweston/pipewire-plugin.h>
+#include "drm-lease.h"
#define WINDOW_TITLE "Weston Compositor"
/* flight recorder size (in bytes) */
@@ -127,6 +128,7 @@ struct wet_compositor {
pid_t autolaunch_pid;
bool autolaunch_watch;
bool use_color_manager;
+ struct dlm_lease *drm_lease;
};
static FILE *weston_logfile = NULL;
@@ -687,6 +689,9 @@ usage(int error_code)
" --seat=SEAT\t\tThe seat that weston should run on, instead of the seat defined in XDG_SEAT\n"
" --tty=TTY\t\tThe tty to use\n"
" --drm-device=CARD\tThe DRM device to use, e.g. \"card0\".\n"
+#ifdef BUILD_DRM_LEASE_CLIENT
+ " --drm-lease=lease\tUse the specified DRM lease. e.g \"card0-HDMI-A-1\"\n"
+#endif
" --use-pixman\t\tUse the pixman (CPU) renderer\n"
" --current-mode\tPrefer current KMS mode over EDID preferred mode\n"
" --continue-without-input\tAllow the compositor to start without input devices\n\n");
@@ -2626,6 +2631,7 @@ load_drm_backend(struct weston_compositor *c,
struct wet_compositor *wet = to_wet_compositor(c);
bool without_input = false;
int ret = 0;
+ char *drm_lease_name = NULL;
wet->drm_use_current_mode = false;
@@ -2637,6 +2643,7 @@ load_drm_backend(struct weston_compositor *c,
{ WESTON_OPTION_STRING, "seat", 0, &config.seat_id },
{ WESTON_OPTION_INTEGER, "tty", 0, &config.tty },
{ WESTON_OPTION_STRING, "drm-device", 0, &config.specific_device },
+ { WESTON_OPTION_STRING, "drm-lease", 0, &drm_lease_name },
{ WESTON_OPTION_BOOLEAN, "current-mode", 0, &wet->drm_use_current_mode },
{ WESTON_OPTION_BOOLEAN, "use-pixman", 0, &config.use_pixman },
{ WESTON_OPTION_BOOLEAN, "continue-without-input", false, &without_input }
@@ -2658,6 +2665,7 @@ load_drm_backend(struct weston_compositor *c,
config.base.struct_version = WESTON_DRM_BACKEND_CONFIG_VERSION;
config.base.struct_size = sizeof(struct weston_drm_backend_config);
config.configure_device = configure_input_device;
+ config.device_fd = get_drm_lease(&wet->drm_lease, drm_lease_name);
wet->heads_changed_listener.notify = drm_heads_changed;
weston_compositor_add_heads_changed_listener(c,
@@ -2675,6 +2683,7 @@ load_drm_backend(struct weston_compositor *c,
free(config.gbm_format);
free(config.seat_id);
free(config.specific_device);
+ free(drm_lease_name);
return ret;
}
@@ -3577,6 +3586,7 @@ out:
/* free(NULL) is valid, and it won't be NULL if it's used */
free(wet.parsed_options);
+ release_drm_lease(wet.drm_lease);
if (protologger)
wl_protocol_logger_destroy(protologger);
diff --git a/compositor/meson.build b/compositor/meson.build
index 8a54ea9..5700d25 100644
--- a/compositor/meson.build
+++ b/compositor/meson.build
@@ -25,6 +25,11 @@ if get_option('xwayland')
srcs_weston += 'xwayland.c'
config_h.set_quoted('XSERVER_PATH', get_option('xwayland-path'))
endif
+if get_option('drm-lease')
+ deps_weston += dependency('libdlmclient')
+ srcs_weston += 'drm-lease.c'
+ config_h.set('BUILD_DRM_LEASE_CLIENT', '1')
+endif
libexec_weston = shared_library(
'exec_weston',
diff --git a/libweston/backend-drm/drm.c b/libweston/backend-drm/drm.c
index 0707db7..03e80ce 100644
--- a/libweston/backend-drm/drm.c
+++ b/libweston/backend-drm/drm.c
@@ -3267,6 +3267,7 @@ static void
config_init_to_defaults(struct weston_drm_backend_config *config)
{
config->use_pixman_shadow = true;
+ config->device_fd = -1;
}
WL_EXPORT int
diff --git a/meson_options.txt b/meson_options.txt
index 8a527d7..db9f19b 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -106,6 +106,13 @@ option(
description: 'Virtual remote output with Pipewire on DRM backend'
)
+option(
+ 'drm-lease',
+ type: 'boolean',
+ value: false,
+ description: 'Support for running weston with a leased DRM Master'
+)
+
option(
'shell-desktop',
type: 'boolean',
--
2.17.1
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