Dear Maintainer(s),
I am attaching a Git patch that backports the fixes needed in order to solve the backlight problem. I have tested this on a Dell Latitude E5540 (Intel Haswell i7-4600U with GPU HD Graphics 4400) running Debian Jessie. I hope this can be useful.
Kind regards,
Luca Boccassi
From f29b80b3f1cba1138284c5c28ed01aed5376d037 Mon Sep 17 00:00:00 2001
From: Luca Boccassi <luca.boccassi@gmail.com>
Date: Sun, 1 Mar 2015 12:14:13 +0000
Subject: [PATCH] Backport backlight fix (and other necessary commits)
commit a1717fe5ab0180f82a77a777c4ef870d54654ded
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu Aug 21 07:21:59 2014 +0100
backlight: Move the fd out of the select range
commit 631b4e4c78a807e61214026bf9a1461aadbd59b5
Author: maximilian attems <maks@***>
Date: Thu May 29 17:07:16 2014 +0200
install add new helper
commit b71f3d8bd4d6773899c1bdc903911cf240e68ead
Author: Jan Alexander Steffens (heftig) <jan.steffens@***>
Date: Sat Feb 15 17:53:16 2014 +0100
Backlight helper build fixes
commit 3d629c91cfa98b75c6685c2a2003e64fd1b612c4
Author: Chris Wilson <chris@***>
Date: Sat Feb 15 14:55:09 2014 +0000
intel: Add a helper for setting backlight without root rights
commit a01548ccf192a5b1fa1f4a3e31e1634db39f6b39
Author: Hans de Goede <hdegoede@redhat.com>
Date: Sat Feb 15 00:02:36 2014 +0100
intel: export fd_set_cloexec / fd_set_nonblock
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>
---
Makefile.am | 2 +-
configure.ac | 20 ++
debian/xserver-xorg-video-intel.install | 2 +
src/Makefile.am | 4 +
src/backlight.c | 318 +++++++++++++++++++++
src/backlight.h | 46 +++
src/fd.c | 93 ++++++
src/fd.h | 34 +++
src/intel_device.c | 19 +-
src/sna/sna_display.c | 239 +++-------------
src/uxa/intel_display.c | 224 ++++-----------
tools/.gitignore | 3 +
tools/Makefile.am | 48 ++++
tools/backlight_helper.c | 51 ++++
...g.x.xf86-video-intel.backlight-helper.policy.in | 19 ++
15 files changed, 728 insertions(+), 394 deletions(-)
create mode 100644 src/backlight.c
create mode 100644 src/backlight.h
create mode 100644 src/fd.c
create mode 100644 src/fd.h
create mode 100644 tools/.gitignore
create mode 100644 tools/Makefile.am
create mode 100644 tools/backlight_helper.c
create mode 100644 tools/org.x.xf86-video-intel.backlight-helper.policy.in
diff --git a/Makefile.am b/Makefile.am
index 2b3b5d4..6bb4854 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,7 +20,7 @@
ACLOCAL_AMFLAGS = ${ACLOCAL_FLAGS} -I m4
-SUBDIRS = man xvmc src
+SUBDIRS = man xvmc src tools
MAINTAINERCLEANFILES = ChangeLog INSTALL
diff --git a/configure.ac b/configure.ac
index 9fc011e..2cda018 100644
--- a/configure.ac
+++ b/configure.ac
@@ -62,6 +62,23 @@ AC_DISABLE_STATIC
AC_PROG_LIBTOOL
AC_SYS_LARGEFILE
+# Platform specific settings
+case $host_os in
+ *linux*)
+ backlight_helper=yes
+ ;;
+esac
+
+AC_ARG_ENABLE(backlight-helper,
+ AS_HELP_STRING([--disable-backlight-helper],
+ [Enable building the backlight helper executable for running X under a normal user [default=auto]]),
+ [backlight_helper="$enableval"],)
+AM_CONDITIONAL(BUILD_BACKLIGHT_HELPER, [test "x$backlight_helper" = "xyes"])
+if test "x$backlight_helper" = "xyes"; then
+ tools_msg="$tools_msg xf86-video-intel-backlight-helper"
+ AC_DEFINE(USE_BACKLIGHT_HELPER, 1, [Enable use of the backlight helper interfaces])
+fi
+
# Are we in a git checkout?
dot_git=no
if test -e .git; then
@@ -545,6 +562,7 @@ fi
DRIVER_NAME=intel
AC_SUBST([DRIVER_NAME])
AC_SUBST([moduledir])
+AC_DEFINE_DIR([LIBEXEC_PATH], libexecdir, [libexec directory])
AC_CONFIG_FILES([
Makefile
@@ -563,6 +581,8 @@ AC_CONFIG_FILES([
xvmc/shader/mc/Makefile
xvmc/shader/vld/Makefile
test/Makefile
+ tools/Makefile
+ tools/org.x.xf86-video-intel.backlight-helper.policy
])
AC_OUTPUT
diff --git a/debian/xserver-xorg-video-intel.install b/debian/xserver-xorg-video-intel.install
index 48c5ed0..fdefaad 100644
--- a/debian/xserver-xorg-video-intel.install
+++ b/debian/xserver-xorg-video-intel.install
@@ -1,4 +1,6 @@
usr/lib/xorg/modules/drivers/*.so
usr/lib/libI810XvMC.so*
usr/lib/libIntelXvMC.so*
+usr/lib/xserver-xorg-video-intel/xf86-video-intel-backlight-helper
+usr/share/polkit-1/actions/org.x.xf86-video-intel.backlight-helper.policy
usr/share/man
diff --git a/src/Makefile.am b/src/Makefile.am
index b0781ca..6c4d835 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -52,6 +52,10 @@ endif
NULL:=#
intel_drv_la_SOURCES = \
+ fd.c \
+ fd.h \
+ backlight.c \
+ backlight.h \
i915_pciids.h \
intel_list.h \
intel_options.h \
diff --git a/src/backlight.c b/src/backlight.c
new file mode 100644
index 0000000..cc5d187
--- /dev/null
+++ b/src/backlight.c
@@ -0,0 +1,318 @@
+/***************************************************************************
+
+ Copyright 2014 Intel Corporation. All Rights Reserved.
+ Copyright 2014 Red Hat, Inc.
+
+ 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, sub license, 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 NON-INFRINGEMENT.
+ IN NO EVENT SHALL INTEL, AND/OR ITS SUPPLIERS 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.
+
+ **************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+
+#include "backlight.h"
+#include "fd.h"
+
+/* Enough for 10 digits of backlight + '\n' + '\0' */
+#define BACKLIGHT_VALUE_LEN 12
+
+/*
+ * Unfortunately this is not as simple as I would like it to be. If selinux is
+ * dropping dbus messages pkexec may block *forever*.
+ *
+ * Backgrounding pkexec by doing System("pkexec ...&") does not work because
+ * that detaches pkexec from its parent at which point its security checks
+ * fail and it refuses to execute the helper.
+ *
+ * So we're left with spawning a helper child which gets levels to set written
+ * to it through a pipe. This turns the blocking forever problem from a hung
+ * machine problem into a simple backlight control not working problem.
+ */
+
+#ifdef __OpenBSD__
+
+#include <dev/wscons/wsconsio.h>
+
+int backlight_set(struct backlight *b, int level)
+{
+ struct wsdisplay_param param;
+
+ if (b->iface == NULL)
+ return;
+
+ if ((unsigned)level > b->max)
+ level = b->max;
+
+ memset(¶m, 0, sizeof(param));
+ param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
+ param.curval = level;
+
+ return ioctl(xf86Info.consoleFd, WSDISPLAYIO_SETPARAM, ¶m);
+}
+
+int backlight_get(struct backlight *b)
+{
+ struct wsdisplay_param param;
+
+ if (b->iface == NULL)
+ return -1;
+
+ memset(¶m, 0, sizeof(param));
+ param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
+
+ if (ioctl(xf86Info.consoleFd, WSDISPLAYIO_GETPARAM, ¶m))
+ return -1;
+
+ return param.curval;
+}
+
+int backlight_open(struct backlight *b, char *iface)
+{
+ struct wsdisplay_param param;
+
+ memset(¶m, 0, sizeof(param));
+ param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
+
+ if (ioctl(xf86Info.consoleFd, WSDISPLAYIO_GETPARAM, ¶m) == -1)
+ return -1;
+
+ b->iface = strdup("wscons");
+ if (b->iface == NULL)
+ return -1;
+
+ b->max = param.max;
+ b->fd = -1;
+
+ return param.curval;
+}
+
+#else
+
+static int
+is_sysfs_fd(int fd)
+{
+ struct stat st;
+ return fstat(fd, &st) == 0 && major(st.st_dev) == 0;
+}
+
+static int
+__backlight_read(const char *iface, const char *file)
+{
+ char buf[1024];
+ int fd, val;
+
+ snprintf(buf, sizeof(buf), "%s/%s/%s", BACKLIGHT_CLASS, iface, file);
+ fd = open(buf, O_RDONLY);
+ if (fd == -1)
+ return -1;
+
+ if (is_sysfs_fd(fd)) {
+ val = read(fd, buf, BACKLIGHT_VALUE_LEN - 1);
+ if (val > 0) {
+ buf[val] = '\0';
+ val = atoi(buf);
+ } else
+ val = -1;
+ } else
+ val = -1;
+ close(fd);
+
+ return val;
+}
+
+int backlight_exists(const char *iface)
+{
+ if (__backlight_read(iface, "brightness") < 0)
+ return 0;
+
+ if (__backlight_read(iface, "max_brightness") <= 0)
+ return 0;
+
+ return 1;
+}
+
+static int __backlight_init(struct backlight *b, char *iface, int fd)
+{
+ b->fd = fd_move_cloexec(fd_set_nonblock(fd));
+ b->iface = iface;
+ return 1;
+}
+
+static int __backlight_direct_init(struct backlight *b, char *iface)
+{
+ char path[1024];
+ int fd;
+
+ snprintf(path, sizeof(path), "%s/%s/brightness", BACKLIGHT_CLASS, iface);
+ fd = open(path, O_RDWR);
+ if (fd < 0)
+ return 0;
+
+ if (!is_sysfs_fd(fd)) {
+ close(fd);
+ return 0;
+ }
+
+ return __backlight_init(b, iface, fd);
+}
+
+static int __backlight_helper_init(struct backlight *b, char *iface)
+{
+#if USE_BACKLIGHT_HELPER
+ struct stat st;
+ char *env[] = { NULL };
+ int use_pkexec = 0;
+ int fds[2];
+
+ /* If system policy is to disallow setuid helpers,
+ * we fallback to invoking PolicyKit. However, as pkexec
+ * is quite troublesome and not universally available, we
+ * still try the old fashioned and simple method first.
+ * Either way, we have to trust that it is our backlight-helper
+ * that is run and that we have scrutinised it carefully.
+ */
+ if (stat(LIBEXEC_PATH "/xf86-video-intel-backlight-helper", &st))
+ return 0;
+
+ if ((st.st_mode & (S_IFREG | S_ISUID | S_IXUSR)) != (S_IFREG | S_ISUID | S_IXUSR)) {
+ if (system("pkexec --version"))
+ return 0;
+
+ use_pkexec = 1;
+ }
+
+ if (pipe(fds))
+ return 0;
+
+ switch ((b->pid = fork())) {
+ case 0:
+ close(fds[1]);
+ dup2(fds[0], 0);
+ close(fds[0]);
+ if (use_pkexec) {
+ execlp("pkexec", "pkexec",
+ LIBEXEC_PATH "/xf86-video-intel-backlight-helper",
+ iface, (char *)0);
+ } else {
+ execle(LIBEXEC_PATH "/xf86-video-intel-backlight-helper",
+ "xf86-video-intel-backlight-helper",
+ iface, (char *)0, env);
+ }
+ _exit(1);
+ /* unreachable fallthrough */
+ case -1:
+ close(fds[1]);
+ close(fds[0]);
+ return 0;
+
+ default:
+ close(fds[0]);
+ return __backlight_init(b, iface, fds[1]);
+ }
+#else
+ return 0;
+#endif
+}
+
+int backlight_open(struct backlight *b, char *iface)
+{
+ int level;
+
+ if (iface == NULL)
+ return -1;
+
+ b->max = __backlight_read(iface, "max_brightness");
+ if (b->max <= 0)
+ return -1;
+
+ level = __backlight_read(iface, "brightness");
+ if (level < 0)
+ return -1;
+
+ if (!__backlight_direct_init(b, iface) &&
+ !__backlight_helper_init(b, iface))
+ return -1;
+
+ return level;
+}
+
+int backlight_set(struct backlight *b, int level)
+{
+ char val[BACKLIGHT_VALUE_LEN];
+ int len, ret = 0;
+
+ if (b->iface == NULL)
+ return 0;
+
+ if ((unsigned)level > b->max)
+ level = b->max;
+
+ len = snprintf(val, BACKLIGHT_VALUE_LEN, "%d\n", level);
+ if (write(b->fd, val, len) != len)
+ ret = -1;
+
+ return ret;
+}
+
+int backlight_get(struct backlight *b)
+{
+ int level;
+
+ if (b->iface == NULL)
+ return -1;
+
+ level = __backlight_read(b->iface, "brightness");
+ if (level > b->max)
+ level = b->max;
+ else if (level < 0)
+ level = -1;
+ return level;
+}
+#endif
+
+void backlight_disable(struct backlight *b)
+{
+ if (b->iface == NULL)
+ return;
+
+ if (b->fd != -1)
+ close(b->fd);
+
+ free(b->iface);
+ b->iface = NULL;
+}
+
+void backlight_close(struct backlight *b)
+{
+ backlight_disable(b);
+ if (b->pid)
+ waitpid(b->pid, NULL, 0);
+}
diff --git a/src/backlight.h b/src/backlight.h
new file mode 100644
index 0000000..deecbd0
--- /dev/null
+++ b/src/backlight.h
@@ -0,0 +1,46 @@
+/***************************************************************************
+
+ Copyright 2014 Intel Corporation. All Rights Reserved.
+
+ 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, sub license, 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 NON-INFRINGEMENT.
+ IN NO EVENT SHALL INTEL, AND/OR ITS SUPPLIERS 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.
+
+ **************************************************************************/
+
+#ifndef BACKLIGHT_H
+#define BACKLIGHT_H
+
+struct backlight {
+ char *iface;
+ int max;
+ int pid, fd;
+};
+
+#define BACKLIGHT_CLASS "/sys/class/backlight"
+
+int backlight_exists(const char *iface);
+
+int backlight_open(struct backlight *backlight, char *iface);
+int backlight_set(struct backlight *backlight, int level);
+int backlight_get(struct backlight *backlight);
+void backlight_disable(struct backlight *backlight);
+void backlight_close(struct backlight *backlight);
+
+#endif /* BACKLIGHT_H */
diff --git a/src/fd.c b/src/fd.c
new file mode 100644
index 0000000..445e3f4
--- /dev/null
+++ b/src/fd.c
@@ -0,0 +1,93 @@
+/***************************************************************************
+
+ Copyright 2013 Intel Corporation. All Rights Reserved.
+
+ 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, sub license, 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 NON-INFRINGEMENT.
+ IN NO EVENT SHALL INTEL, AND/OR ITS SUPPLIERS 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.
+
+ **************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <misc.h> /* MAXCLIENTS */
+
+#include "fd.h"
+
+int fd_move_cloexec(int fd)
+{
+ int newfd;
+
+ newfd = fcntl(fd,
+#ifdef F_DUPFD_CLOEXEC
+ F_DUPFD_CLOEXEC,
+#else
+ F_DUPFD,
+#endif
+ MAXCLIENTS);
+ if (newfd < 0)
+ return fd;
+
+#ifndef F_DUPFD_CLOEXEC
+ newfd = fd_set_cloexec(newfd);
+#endif
+
+ close(fd);
+ return newfd;
+}
+
+int fd_set_cloexec(int fd)
+{
+ int flags;
+
+ if (fd == -1)
+ return fd;
+
+#ifdef FD_CLOEXEC
+ flags = fcntl(fd, F_GETFD);
+ if (flags != -1) {
+ flags |= FD_CLOEXEC;
+ fcntl(fd, F_SETFD, flags);
+ }
+#endif
+
+ return fd;
+}
+
+int fd_set_nonblock(int fd)
+{
+ int flags;
+
+ if (fd == -1)
+ return fd;
+
+ flags = fcntl(fd, F_GETFL);
+ if (flags != -1) {
+ flags |= O_NONBLOCK;
+ fcntl(fd, F_SETFL, flags);
+ }
+
+ return fd;
+}
+
diff --git a/src/fd.h b/src/fd.h
new file mode 100644
index 0000000..d71fa7b
--- /dev/null
+++ b/src/fd.h
@@ -0,0 +1,34 @@
+/***************************************************************************
+
+ Copyright 2013 Intel Corporation. All Rights Reserved.
+
+ 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, sub license, 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 NON-INFRINGEMENT.
+ IN NO EVENT SHALL INTEL, AND/OR ITS SUPPLIERS 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.
+
+ **************************************************************************/
+
+#ifndef FD_H
+#define FD_H
+
+int fd_move_cloexec(int fd);
+int fd_set_cloexec(int fd);
+int fd_set_nonblock(int fd);
+
+#endif /* FD_H */
diff --git a/src/intel_device.c b/src/intel_device.c
index d9ff8bc..8728398 100644
--- a/src/intel_device.c
+++ b/src/intel_device.c
@@ -41,6 +41,7 @@
#include <i915_drm.h>
#include "intel_driver.h"
+#include "fd.h"
struct intel_device {
char *path;
@@ -103,24 +104,6 @@ static int __intel_check_device(int fd)
return ret;
}
-static int fd_set_cloexec(int fd)
-{
- int flags;
-
- if (fd == -1)
- return fd;
-
-#ifdef FD_CLOEXEC
- flags = fcntl(fd, F_GETFD);
- if (flags != -1) {
- flags |= FD_CLOEXEC;
- fcntl(fd, F_SETFD, flags);
- }
-#endif
-
- return fd;
-}
-
static int __intel_open_device(const struct pci_device *pci, char **path)
{
int fd;
diff --git a/src/sna/sna_display.c b/src/sna/sna_display.c
index 3d42eb9..2d49b81 100644
--- a/src/sna/sna_display.c
+++ b/src/sna/sna_display.c
@@ -51,6 +51,7 @@
#include "fb/fbpict.h"
#include "intel_options.h"
+#include "backlight.h"
#define KNOWN_MODE_FLAGS ((1<<14)-1)
@@ -103,9 +104,8 @@ struct sna_output {
uint32_t dpms_id;
int dpms_mode;
- char *backlight_iface;
+ struct backlight backlight;
int backlight_active_level;
- int backlight_max;
int num_modes;
struct drm_mode_modeinfo *modes;
@@ -140,11 +140,6 @@ static bool sna_mode_has_pending_events(struct sna *sna)
return poll(&pfd, 1, 0) == 1;
}
-#define BACKLIGHT_CLASS "/sys/class/backlight"
-
-/* Enough for 10 digits of backlight + '\n' + '\0' */
-#define BACKLIGHT_VALUE_LEN 12
-
static inline uint32_t fb_id(struct kgem_bo *bo)
{
return bo->delta;
@@ -252,178 +247,39 @@ static void gem_close(int fd, uint32_t handle)
(void)drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &close);
}
-#ifdef __OpenBSD__
-
-#include <dev/wscons/wsconsio.h>
-#include <xf86Priv.h>
+#define BACKLIGHT_NAME "Backlight"
+#define BACKLIGHT_DEPRECATED_NAME "BACKLIGHT"
+static Atom backlight_atom, backlight_deprecated_atom;
static void
sna_output_backlight_set(xf86OutputPtr output, int level)
{
struct sna_output *sna_output = output->driver_private;
- struct wsdisplay_param param;
-
- DBG(("%s: level=%d, max=%d\n", __FUNCTION__,
- level, sna_output->backlight_max));
-
- if (!sna_output->backlight_iface)
- return;
-
- if ((unsigned)level > sna_output->backlight_max)
- level = sna_output->backlight_max;
-
- VG_CLEAR(param);
- param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
- param.curval = level;
-
- if (ioctl(xf86Info.consoleFd, WSDISPLAYIO_SETPARAM, ¶m) == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
- "Failed to set backlight level: %s\n",
- strerror(errno));
- }
-}
-
-static int
-sna_output_backlight_get(xf86OutputPtr output)
-{
- struct wsdisplay_param param;
-
- VG_CLEAR(param);
- param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
+ DBG(("%s(%s) level=%d, max=%d\n", __FUNCTION__,
+ output->name, level, sna_output->backlight.max));
- if (ioctl(xf86Info.consoleFd, WSDISPLAYIO_GETPARAM, ¶m) == -1) {
+ if (backlight_set(&sna_output->backlight, level)) {
xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
- "Failed to get backlight level: %s\n",
- strerror(errno));
- return -1;
- }
-
- DBG(("%s: level=%d (max=%d)\n", __FUNCTION__, param.curval, param.max));
-
- return param.curval;
-}
-
-static void
-sna_output_backlight_init(xf86OutputPtr output)
-{
- struct sna_output *sna_output = output->driver_private;
- struct wsdisplay_param param;
-
- VG_CLEAR(param);
- param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
-
- if (ioctl(xf86Info.consoleFd, WSDISPLAYIO_GETPARAM, ¶m) == -1)
- return;
-
- DBG(("%s: found 'wscons'\n", __FUNCTION__));
-
- sna_output->backlight_iface = "wscons";
- sna_output->backlight_max = param.max;
- sna_output->backlight_active_level = param.curval;
-}
-
-#else
-
-static void
-sna_output_backlight_set(xf86OutputPtr output, int level)
-{
- struct sna_output *sna_output = output->driver_private;
- char path[1024], val[BACKLIGHT_VALUE_LEN];
- int fd, len, ret;
-
- DBG(("%s: level=%d, max=%d\n", __FUNCTION__,
- level, sna_output->backlight_max));
-
- if (!sna_output->backlight_iface)
- return;
-
- if ((unsigned)level > sna_output->backlight_max)
- level = sna_output->backlight_max;
-
- len = snprintf(val, BACKLIGHT_VALUE_LEN, "%d\n", level);
- sprintf(path, "%s/%s/brightness",
- BACKLIGHT_CLASS, sna_output->backlight_iface);
- fd = open(path, O_RDWR);
- if (fd == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, "failed to open %s for backlight "
- "control: %s\n", path, strerror(errno));
- return;
- }
-
- ret = write(fd, val, len);
- if (ret == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, "write to %s for backlight "
- "control failed: %s\n", path, strerror(errno));
+ "Failed to set backlight %s for output %s to brightness level %d, disabling\n",
+ sna_output->backlight.iface, output->name, level);
+ backlight_disable(&sna_output->backlight);
+ if (output->randr_output) {
+ RRDeleteOutputProperty(output->randr_output, backlight_atom);
+ RRDeleteOutputProperty(output->randr_output, backlight_deprecated_atom);
+ }
}
-
- close(fd);
}
static int
sna_output_backlight_get(xf86OutputPtr output)
{
struct sna_output *sna_output = output->driver_private;
- char path[1024], val[BACKLIGHT_VALUE_LEN];
- int fd, level;
-
- sprintf(path, "%s/%s/actual_brightness",
- BACKLIGHT_CLASS, sna_output->backlight_iface);
- fd = open(path, O_RDONLY);
- if (fd == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, "failed to open %s "
- "for backlight control: %s\n", path, strerror(errno));
- return -1;
- }
-
- memset(val, 0, sizeof(val));
- if (read(fd, val, BACKLIGHT_VALUE_LEN) == -1) {
- close(fd);
- return -1;
- }
-
- close(fd);
-
- level = atoi(val);
- DBG(("%s: level=%d (max=%d)\n",
- __FUNCTION__, level, sna_output->backlight_max));
-
- if (level > sna_output->backlight_max)
- level = sna_output->backlight_max;
- else if (level < 0)
- level = -1;
+ int level = backlight_get(&sna_output->backlight);
+ DBG(("%s(%s) level=%d, max=%d\n", __FUNCTION__,
+ output->name, level, sna_output->backlight.max));
return level;
}
-static int
-sna_output_backlight_get_max(xf86OutputPtr output)
-{
- struct sna_output *sna_output = output->driver_private;
- char path[1024], val[BACKLIGHT_VALUE_LEN];
- int fd, max = 0;
-
- sprintf(path, "%s/%s/max_brightness",
- BACKLIGHT_CLASS, sna_output->backlight_iface);
- fd = open(path, O_RDONLY);
- if (fd == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, "failed to open %s "
- "for backlight control: %s\n", path, strerror(errno));
- return -1;
- }
-
- memset(val, 0, sizeof(val));
- if (read(fd, val, BACKLIGHT_VALUE_LEN) == -1) {
- close(fd);
- return -1;
- }
-
- close(fd);
-
- max = atoi(val);
- if (max <= 0)
- max = -1;
- return max;
-}
-
enum {
PLATFORM,
FIRMWARE,
@@ -434,21 +290,16 @@ enum {
static char *
has_user_backlight_override(xf86OutputPtr output)
{
- struct sna_output *sna_output = output->driver_private;
struct sna *sna = to_sna(output->scrn);
char *str;
- int max;
str = xf86GetOptValString(sna->Options, OPTION_BACKLIGHT);
if (str == NULL)
return NULL;
- sna_output->backlight_iface = str;
- max = sna_output_backlight_get_max(output);
- sna_output->backlight_iface = NULL;
- if (max <= 0) {
+ if (!backlight_exists(str)) {
xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
- "unrecognised backlight control interface '%s'\n",
+ "Unrecognised backlight control interface '%s'\n",
str);
return NULL;
}
@@ -459,7 +310,6 @@ has_user_backlight_override(xf86OutputPtr output)
static char *
has_device_backlight(xf86OutputPtr output, int *best_type)
{
- struct sna_output *sna_output = output->driver_private;
struct sna *sna = to_sna(output->scrn);
struct pci_device *pci = sna->PciInfo;
char path[1024];
@@ -511,12 +361,8 @@ has_device_backlight(xf86OutputPtr output, int *best_type)
if (v < *best_type) {
char *copy;
- int max;
- sna_output->backlight_iface = de->d_name;
- max = sna_output_backlight_get_max(output);
- sna_output->backlight_iface = NULL;
- if (max <= 0)
+ if (!backlight_exists(de->d_name))
continue;
copy = strdup(de->d_name);
@@ -550,7 +396,6 @@ has_backlight(xf86OutputPtr output, int *best_type)
"acpi_video0",
"intel_backlight",
};
- struct sna_output *sna_output = output->driver_private;
char *best_iface = NULL;
DIR *dir;
struct dirent *de;
@@ -604,14 +449,10 @@ has_backlight(xf86OutputPtr output, int *best_type)
if (v < *best_type) {
char *copy;
- int max;
/* XXX detect right backlight for multi-GPU/panels */
- sna_output->backlight_iface = de->d_name;
- max = sna_output_backlight_get_max(output);
- sna_output->backlight_iface = NULL;
- if (max <= 0)
+ if (!backlight_exists(de->d_name))
continue;
copy = strdup(de->d_name);
@@ -648,12 +489,15 @@ sna_output_backlight_init(xf86OutputPtr output)
if (best_iface)
goto done;
- return;
+ best_type = PLATFORM;
+ best_iface = NULL;
done:
- sna_output->backlight_iface = best_iface;
- sna_output->backlight_max = sna_output_backlight_get_max(output);
- sna_output->backlight_active_level = sna_output_backlight_get(output);
+ sna_output->backlight_active_level =
+ backlight_open(&sna_output->backlight, best_iface);
+ if (sna_output->backlight_active_level < 0)
+ return;
+
switch (best_type) {
case INT_MAX: best_iface = (char *)"user"; from = X_CONFIG; break;
case FIRMWARE: best_iface = (char *)"firmware"; break;
@@ -662,10 +506,9 @@ done:
default: best_iface = (char *)"unknown"; break;
}
xf86DrvMsg(output->scrn->scrnIndex, from,
- "found backlight control interface %s (type '%s')\n",
- sna_output->backlight_iface, best_iface);
+ "Found backlight control interface %s (type '%s') for output %s\n",
+ sna_output->backlight.iface, best_iface, output->name);
}
-#endif
static DisplayModePtr
mode_from_kmode(ScrnInfoPtr scrn,
@@ -2049,7 +1892,7 @@ sna_output_destroy(xf86OutputPtr output)
free(sna_output->prop_ids);
free(sna_output->prop_values);
- free(sna_output->backlight_iface);
+ backlight_close(&sna_output->backlight);
free(sna_output);
output->driver_private = NULL;
@@ -2060,7 +1903,7 @@ sna_output_dpms_backlight(xf86OutputPtr output, int oldmode, int mode)
{
struct sna_output *sna_output = output->driver_private;
- if (!sna_output->backlight_iface)
+ if (!sna_output->backlight.iface)
return;
if (mode == DPMSModeOn) {
@@ -2154,10 +1997,6 @@ sna_output_create_ranged_atom(xf86OutputPtr output, Atom *atom,
"RRChangeOutputProperty error, %d\n", err);
}
-#define BACKLIGHT_NAME "Backlight"
-#define BACKLIGHT_DEPRECATED_NAME "BACKLIGHT"
-static Atom backlight_atom, backlight_deprecated_atom;
-
static void
sna_output_create_resources(xf86OutputPtr output)
{
@@ -2228,20 +2067,20 @@ sna_output_create_resources(xf86OutputPtr output)
}
}
- if (sna_output->backlight_iface) {
+ if (sna_output->backlight.iface) {
/* Set up the backlight property, which takes effect
* immediately and accepts values only within the
* backlight_range.
*/
sna_output_create_ranged_atom(output, &backlight_atom,
BACKLIGHT_NAME, 0,
- sna_output->backlight_max,
+ sna_output->backlight.max,
sna_output->backlight_active_level,
FALSE);
sna_output_create_ranged_atom(output,
&backlight_deprecated_atom,
BACKLIGHT_DEPRECATED_NAME, 0,
- sna_output->backlight_max,
+ sna_output->backlight.max,
sna_output->backlight_active_level,
FALSE);
}
@@ -2265,7 +2104,9 @@ sna_output_set_property(xf86OutputPtr output, Atom property,
}
val = *(INT32 *)value->data;
- if (val < 0 || val > sna_output->backlight_max)
+ DBG(("%s: setting backlight to %d (max=%d)\n",
+ __FUNCTION__, (int)val, sna_output->backlight.max));
+ if (val < 0 || val > sna_output->backlight.max)
return FALSE;
if (sna_output->dpms_mode == DPMSModeOn)
@@ -2331,7 +2172,7 @@ sna_output_get_property(xf86OutputPtr output, Atom property)
if (property == backlight_atom || property == backlight_deprecated_atom) {
INT32 val;
- if (! sna_output->backlight_iface)
+ if (! sna_output->backlight.iface)
return FALSE;
val = sna_output_backlight_get(output);
diff --git a/src/uxa/intel_display.c b/src/uxa/intel_display.c
index b4f7e87..74455c1 100644
--- a/src/uxa/intel_display.c
+++ b/src/uxa/intel_display.c
@@ -43,6 +43,7 @@
#include "intel.h"
#include "intel_bufmgr.h"
#include "intel_options.h"
+#include "backlight.h"
#include "xf86drm.h"
#include "xf86drmMode.h"
#include "X11/Xatom.h"
@@ -115,9 +116,8 @@ struct intel_output {
int panel_vdisplay;
int dpms_mode;
- const char *backlight_iface;
+ struct backlight backlight;
int backlight_active_level;
- int backlight_max;
xf86OutputPtr output;
struct list link;
};
@@ -134,68 +134,6 @@ crtc_id(struct intel_crtc *crtc)
return crtc->mode_crtc->crtc_id;
}
-#ifdef __OpenBSD__
-
-#include <dev/wscons/wsconsio.h>
-#include "xf86Priv.h"
-
-static void
-intel_output_backlight_set(xf86OutputPtr output, int level)
-{
- struct intel_output *intel_output = output->driver_private;
- struct wsdisplay_param param;
-
- if (level > intel_output->backlight_max)
- level = intel_output->backlight_max;
- if (! intel_output->backlight_iface || level < 0)
- return;
-
- param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
- param.curval = level;
- if (ioctl(xf86Info.consoleFd, WSDISPLAYIO_SETPARAM, ¶m) == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
- "Failed to set backlight level: %s\n",
- strerror(errno));
- }
-}
-
-static int
-intel_output_backlight_get(xf86OutputPtr output)
-{
- struct wsdisplay_param param;
-
- param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
- if (ioctl(xf86Info.consoleFd, WSDISPLAYIO_GETPARAM, ¶m) == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
- "Failed to get backlight level: %s\n",
- strerror(errno));
- return -1;
- }
-
- return param.curval;
-}
-
-static void
-intel_output_backlight_init(xf86OutputPtr output)
-{
- struct intel_output *intel_output = output->driver_private;
- struct wsdisplay_param param;
-
- param.param = WSDISPLAYIO_PARAM_BRIGHTNESS;
- if (ioctl(xf86Info.consoleFd, WSDISPLAYIO_GETPARAM, ¶m) == -1) {
- intel_output->backlight_iface = NULL;
- return;
- }
-
- intel_output->backlight_iface = "wscons";
- intel_output->backlight_max = param.max;
- intel_output->backlight_active_level = param.curval;
-}
-
-#else
-
-#define BACKLIGHT_CLASS "/sys/class/backlight"
-
/*
* List of available kernel interfaces in priority order
*/
@@ -215,127 +153,50 @@ static const char *backlight_interfaces[] = {
"intel_backlight",
NULL,
};
-/*
- * Must be long enough for BACKLIGHT_CLASS + '/' + longest in above table +
- * '/' + "max_backlight"
- */
-#define BACKLIGHT_PATH_LEN 80
-/* Enough for 10 digits of backlight + '\n' + '\0' */
-#define BACKLIGHT_VALUE_LEN 12
static void
intel_output_backlight_set(xf86OutputPtr output, int level)
{
struct intel_output *intel_output = output->driver_private;
- char path[BACKLIGHT_PATH_LEN], val[BACKLIGHT_VALUE_LEN];
- int fd, len, ret;
-
- if (level > intel_output->backlight_max)
- level = intel_output->backlight_max;
- if (! intel_output->backlight_iface || level < 0)
- return;
-
- len = snprintf(val, BACKLIGHT_VALUE_LEN, "%d\n", level);
- sprintf(path, "%s/%s/brightness",
- BACKLIGHT_CLASS, intel_output->backlight_iface);
- fd = open(path, O_RDWR);
- if (fd == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, "failed to open %s for backlight "
- "control: %s\n", path, strerror(errno));
- return;
- }
-
- ret = write(fd, val, len);
- if (ret == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, "write to %s for backlight "
- "control failed: %s\n", path, strerror(errno));
+ if (backlight_set(&intel_output->backlight, level) < 0) {
+ xf86DrvMsg(output->scrn->scrnIndex, X_ERROR,
+ "failed to set backlight %s to brightness level %d, disabling\n",
+ intel_output->backlight.iface, level);
+ backlight_disable(&intel_output->backlight);
}
-
- close(fd);
}
static int
intel_output_backlight_get(xf86OutputPtr output)
{
struct intel_output *intel_output = output->driver_private;
- char path[BACKLIGHT_PATH_LEN], val[BACKLIGHT_VALUE_LEN];
- int fd, level;
-
- sprintf(path, "%s/%s/actual_brightness",
- BACKLIGHT_CLASS, intel_output->backlight_iface);
- fd = open(path, O_RDONLY);
- if (fd == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, "failed to open %s "
- "for backlight control: %s\n", path, strerror(errno));
- return -1;
- }
-
- memset(val, 0, sizeof(val));
- if (read(fd, val, BACKLIGHT_VALUE_LEN) == -1) {
- close(fd);
- return -1;
- }
-
- close(fd);
-
- level = atoi(val);
- if (level > intel_output->backlight_max)
- level = intel_output->backlight_max;
- if (level < 0)
- level = -1;
- return level;
-}
-
-static int
-intel_output_backlight_get_max(xf86OutputPtr output)
-{
- struct intel_output *intel_output = output->driver_private;
- char path[BACKLIGHT_PATH_LEN], val[BACKLIGHT_VALUE_LEN];
- int fd, max = 0;
-
- sprintf(path, "%s/%s/max_brightness",
- BACKLIGHT_CLASS, intel_output->backlight_iface);
- fd = open(path, O_RDONLY);
- if (fd == -1) {
- xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, "failed to open %s "
- "for backlight control: %s\n", path, strerror(errno));
- return -1;
- }
-
- memset(val, 0, sizeof(val));
- if (read(fd, val, BACKLIGHT_VALUE_LEN) == -1) {
- close(fd);
- return -1;
- }
-
- close(fd);
-
- max = atoi(val);
- if (max <= 0)
- max = -1;
- return max;
+ return backlight_get(&intel_output->backlight);
}
static void
intel_output_backlight_init(xf86OutputPtr output)
{
+#ifdef __OpenBSD__
+ intel_output->backlight_active_level =
+ backlight_init(&intel_output->backlight, NULL);
+ if (intel_output->backlight_active_level != -1) {
+ xf86DrvMsg(output->scrn->scrnIndex, X_PROBED,
+ "found backlight control interface\n");
+ }
+#else
struct intel_output *intel_output = output->driver_private;
intel_screen_private *intel = intel_get_screen_private(output->scrn);
- char path[BACKLIGHT_PATH_LEN];
- struct stat buf;
char *str;
int i;
str = xf86GetOptValString(intel->Options, OPTION_BACKLIGHT);
if (str != NULL) {
- sprintf(path, "%s/%s", BACKLIGHT_CLASS, str);
- if (!stat(path, &buf)) {
- intel_output->backlight_iface = str;
- intel_output->backlight_max = intel_output_backlight_get_max(output);
- if (intel_output->backlight_max > 0) {
- intel_output->backlight_active_level = intel_output_backlight_get(output);
+ if (backlight_exists(str)) {
+ intel_output->backlight_active_level =
+ backlight_open(&intel_output->backlight, strdup(str));
+ if (intel_output->backlight_active_level != -1) {
xf86DrvMsg(output->scrn->scrnIndex, X_CONFIG,
- "found backlight control interface %s\n", path);
+ "found backlight control interface %s\n", str);
return;
}
}
@@ -344,22 +205,18 @@ intel_output_backlight_init(xf86OutputPtr output)
}
for (i = 0; backlight_interfaces[i] != NULL; i++) {
- sprintf(path, "%s/%s", BACKLIGHT_CLASS, backlight_interfaces[i]);
- if (!stat(path, &buf)) {
- intel_output->backlight_iface = backlight_interfaces[i];
- intel_output->backlight_max = intel_output_backlight_get_max(output);
- if (intel_output->backlight_max > 0) {
- intel_output->backlight_active_level = intel_output_backlight_get(output);
+ if (backlight_exists(backlight_interfaces[i])) {
+ intel_output->backlight_active_level =
+ backlight_open(&intel_output->backlight, strdup(backlight_interfaces[i]));
+ if (intel_output->backlight_active_level != -1) {
xf86DrvMsg(output->scrn->scrnIndex, X_PROBED,
- "found backlight control interface %s\n", path);
+ "found backlight control interface %s\n", backlight_interfaces[i]);
return;
}
}
}
- intel_output->backlight_iface = NULL;
-}
-
#endif
+}
static void
mode_from_kmode(ScrnInfoPtr scrn,
@@ -468,6 +325,9 @@ intel_crtc_apply(xf86CrtcPtr crtc)
continue;
intel_output = output->driver_private;
+ if (!intel_output->mode_output)
+ return FALSE;
+
output_ids[output_count] =
intel_output->mode_output->connector_id;
output_count++;
@@ -924,6 +784,11 @@ intel_output_attach_edid(xf86OutputPtr output)
xf86MonPtr mon = NULL;
int i;
+ if (!koutput) {
+ xf86OutputSetEDID(output, mon);
+ return;
+ }
+
/* look for an EDID property */
for (i = 0; i < koutput->count_props; i++) {
drmModePropertyPtr props;
@@ -1013,6 +878,9 @@ intel_output_get_modes(xf86OutputPtr output)
intel_output_attach_edid(output);
+ if (!koutput)
+ return;
+
/* modes should already be available */
for (i = 0; i < koutput->count_modes; i++) {
DisplayModePtr Mode;
@@ -1070,6 +938,7 @@ intel_output_destroy(xf86OutputPtr output)
intel_output->mode_output = NULL;
list_del(&intel_output->link);
+ backlight_close(&intel_output->backlight);
free(intel_output);
output->driver_private = NULL;
@@ -1080,7 +949,7 @@ intel_output_dpms_backlight(xf86OutputPtr output, int oldmode, int mode)
{
struct intel_output *intel_output = output->driver_private;
- if (!intel_output->backlight_iface)
+ if (!intel_output->backlight.iface)
return;
if (mode == DPMSModeOn) {
@@ -1104,6 +973,9 @@ intel_output_dpms(xf86OutputPtr output, int dpms)
struct intel_mode *mode = intel_output->mode;
int i;
+ if (!koutput)
+ return;
+
for (i = 0; i < koutput->count_props; i++) {
drmModePropertyPtr props;
@@ -1271,20 +1143,20 @@ intel_output_create_resources(xf86OutputPtr output)
}
}
- if (intel_output->backlight_iface) {
+ if (intel_output->backlight.iface) {
/* Set up the backlight property, which takes effect
* immediately and accepts values only within the
* backlight_range.
*/
intel_output_create_ranged_atom(output, &backlight_atom,
BACKLIGHT_NAME, 0,
- intel_output->backlight_max,
+ intel_output->backlight.max,
intel_output->backlight_active_level,
FALSE);
intel_output_create_ranged_atom(output,
&backlight_deprecated_atom,
BACKLIGHT_DEPRECATED_NAME, 0,
- intel_output->backlight_max,
+ intel_output->backlight.max,
intel_output->backlight_active_level,
FALSE);
}
@@ -1308,7 +1180,7 @@ intel_output_set_property(xf86OutputPtr output, Atom property,
}
val = *(INT32 *)value->data;
- if (val < 0 || val > intel_output->backlight_max)
+ if (val < 0 || val > intel_output->backlight.max)
return FALSE;
if (intel_output->dpms_mode == DPMSModeOn)
@@ -1374,7 +1246,7 @@ intel_output_get_property(xf86OutputPtr output, Atom property)
if (property == backlight_atom || property == backlight_deprecated_atom) {
INT32 val;
- if (! intel_output->backlight_iface)
+ if (!intel_output->backlight.iface)
return FALSE;
val = intel_output_backlight_get(output);
diff --git a/tools/.gitignore b/tools/.gitignore
new file mode 100644
index 0000000..36868c6
--- /dev/null
+++ b/tools/.gitignore
@@ -0,0 +1,3 @@
+intel-virtual-output
+xf86-video-intel-backlight-helper
+org.x.xf86-video-intel.backlight-helper.policy
diff --git a/tools/Makefile.am b/tools/Makefile.am
new file mode 100644
index 0000000..c82c422
--- /dev/null
+++ b/tools/Makefile.am
@@ -0,0 +1,48 @@
+# Copyright 2005 Adam Jackson.
+#
+# 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
+# on the rights to use, copy, modify, merge, publish, distribute, sub
+# license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+# ADAM JACKSON 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.
+
+AM_CFLAGS = \
+ @CWARNFLAGS@ \
+ @NOWARNFLAGS@ \
+ $(NULL)
+
+drivermandir = $(DRIVER_MAN_DIR)
+policydir = $(datarootdir)/polkit-1/actions
+
+if BUILD_BACKLIGHT_HELPER
+libexec_PROGRAMS = xf86-video-intel-backlight-helper
+nodist_policy_DATA = org.x.xf86-video-intel.backlight-helper.policy
+
+backlight_helper = $(libexecdir)/xf86-video-intel-backlight-helper
+install-exec-hook:
+ -chown root $(DESTDIR)$(backlight_helper) && chmod u+s $(DESTDIR)$(backlight_helper)
+endif
+
+xf86_video_intel_backlight_helper_SOURCES = \
+ backlight_helper.c \
+ $(NULL)
+
+EXTRA_DIST = org.x.xf86-video-intel.backlight-helper.policy.in
+CLEANFILES = $(nodist_policy_DATA)
+
+# String replacements in MAN_SUBSTS now come from xorg-macros.m4 via configure
+SUFFIXES = .$(DRIVER_MAN_SUFFIX) .man
+.man.$(DRIVER_MAN_SUFFIX):
+ $(AM_V_GEN)$(SED) $(MAN_SUBSTS) < $< > $@
diff --git a/tools/backlight_helper.c b/tools/backlight_helper.c
new file mode 100644
index 0000000..fc16fce
--- /dev/null
+++ b/tools/backlight_helper.c
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+int main(int argc, char *argv[])
+{
+ struct stat st;
+ char buf[1024], *b = buf;
+ int len, fd;
+
+ if (argc != 2) {
+ fprintf(stderr, "Usage: %s <iface>\n", argv[0]);
+ return 1;
+ }
+
+ snprintf(buf, sizeof(buf), "/sys/class/backlight/%s/brightness", argv[1]);
+ fd = open(buf, O_RDWR);
+ if (fd < 0 || fstat(fd, &st) || major(st.st_dev)) {
+ fprintf(stderr, "Cannot access backlight interface '%s'\n", argv[1]);
+ return 1;
+ }
+
+ while ((len = read(0, b, sizeof(buf) - (b - buf) - 1)) > 0) {
+ len += b - buf;
+ buf[len] = '\0';
+
+ b = buf;
+ do {
+ char *end = strchr(b, '\n');
+ if (end == NULL)
+ break;
+
+ ++end;
+ if (write(fd, b, end - b) != end - b) {
+ fprintf(stderr, "Failed to update backlight interface '%s'\n", argv[1]);
+ return 2;
+ }
+
+ b = end;
+ } while (1);
+
+ memmove(buf, b, len = buf + len - b);
+ b = buf + len;
+ }
+
+ return 0;
+}
diff --git a/tools/org.x.xf86-video-intel.backlight-helper.policy.in b/tools/org.x.xf86-video-intel.backlight-helper.policy.in
new file mode 100644
index 0000000..96e772d
--- /dev/null
+++ b/tools/org.x.xf86-video-intel.backlight-helper.policy.in
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE policyconfig PUBLIC
+ "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"
+ "http://www.freedesktop.org/standards/PolicyKit/1.0/policyconfig.dtd";>
+<policyconfig>
+ <vendor>The X.Org project</vendor>
+ <vendor_url>https://01.org/linuxgraphics/community/xf86-video-intel</vendor_url>
+ <icon_name>brightness</icon_name>
+ <action id="org.x.xf86-video-intel.backlight-helper">
+ <description>Modify lcd panel brightness</description>
+ <message>Authentication is required to modify the lcd panel brightness</message>
+ <defaults>
+ <allow_any>no</allow_any>
+ <allow_inactive>no</allow_inactive>
+ <allow_active>yes</allow_active>
+ </defaults>
+ <annotate key="org.freedesktop.policykit.exec.path">@LIBEXEC_PATH@/xf86-video-intel-backlight-helper</annotate>
+ </action>
+</policyconfig>
--
2.1.4
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