summaryrefslogtreecommitdiff
path: root/tests
diff options
context:
space:
mode:
authorTiago Vignatti <tiago.vignatti@intel.com>2012-03-12 19:40:08 -0300
committerKristian Høgsberg <krh@bitplanet.net>2012-03-20 22:43:54 -0400
commit1b079abe0e2c075ec4d600c492a72ec980e03baa (patch)
treef8280e9fabe9f9bc481ee3cc2a632d6b92a6c323 /tests
parent07b2606c7a2ba785b7281d58a58b20cc9172c3ab (diff)
tests: add backlight test
Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com>
Diffstat (limited to 'tests')
-rw-r--r--tests/Makefile.am9
-rw-r--r--tests/setbacklight.c191
2 files changed, 199 insertions, 1 deletions
diff --git a/tests/Makefile.am b/tests/Makefile.am
index ff64060..1df2c79 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,6 +1,6 @@
if BUILD_TESTS
-noinst_PROGRAMS = matrix-test
+noinst_PROGRAMS = matrix-test setbacklight
endif
@@ -13,3 +13,10 @@ matrix_test_SOURCES = \
$(top_srcdir)/src/matrix.c \
$(top_srcdir)/src/matrix.h
matrix_test_LDADD = -lm -lrt
+
+setbacklight_SOURCES = \
+ setbacklight.c \
+ $(top_srcdir)/src/libbacklight.c \
+ $(top_srcdir)/src/libbacklight.h
+
+setbacklight_LDADD = -ludev -ldrm
diff --git a/tests/setbacklight.c b/tests/setbacklight.c
new file mode 100644
index 0000000..f7b298c
--- /dev/null
+++ b/tests/setbacklight.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of the copyright holders not be used in
+ * advertising or publicity pertaining to distribution of the software
+ * without specific, written prior permission. The copyright holders make
+ * no representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+ * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Tiago Vignatti
+ */
+/*
+ * \file setbacklight.c
+ * Test program to get a backlight connector and set its brightness value.
+ * Queries for the connectors id can be performed using drm/tests/modeprint
+ * program.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+
+#include "libbacklight.h"
+
+static uint32_t
+get_drm_connector_type(struct udev_device *drm_device, uint32_t connector_id)
+{
+ const char *filename;
+ int fd, i, connector_type;
+ drmModeResPtr res;
+ drmModeConnectorPtr connector;
+
+ filename = udev_device_get_devnode(drm_device);
+ fd = open(filename, O_RDWR | O_CLOEXEC);
+ if (fd < 0) {
+ printf("couldn't open drm_device\n");
+ return -1;
+ }
+
+ res = drmModeGetResources(fd);
+ if (res == 0) {
+ printf("Failed to get resources from card\n");
+ close(fd);
+ return -1;
+ }
+
+ for (i = 0; i < res->count_connectors; i++) {
+ connector = drmModeGetConnector(fd, res->connectors[i]);
+ if (!connector)
+ continue;
+
+ if ((connector->connection == DRM_MODE_DISCONNECTED) ||
+ (connector->connector_id != connector_id)) {
+ drmModeFreeConnector(connector);
+ continue;
+ }
+
+ connector_type = connector->connector_type;
+ drmModeFreeConnector(connector);
+ drmModeFreeResources(res);
+
+ return connector_type;
+ }
+
+ drmModeFreeResources(res);
+ return -1;
+}
+
+/* returns a value between 0-255 range, where higher is brighter */
+static uint32_t
+get_normalized_backlight(struct backlight *backlight)
+{
+ long brightness, max_brightness;
+ long norm;
+
+ brightness = backlight_get_brightness(backlight);
+ max_brightness = backlight_get_max_brightness(backlight);
+
+ /* convert it to a scale of 0 to 255 */
+ norm = (brightness * 255)/(max_brightness);
+
+ return (int) norm;
+}
+
+static void
+set_backlight(struct udev_device *drm_device, int connector_id, int blight)
+{
+ int connector_type;
+ long max_brightness, brightness, actual_brightness;
+ struct backlight *backlight;
+ long new_blight;
+
+ connector_type = get_drm_connector_type(drm_device, connector_id);
+ if (connector_type < 0)
+ return;
+
+ backlight = backlight_init(drm_device, connector_type);
+ if (!backlight) {
+ printf("backlight adjust failed\n");
+ return;
+ }
+
+ max_brightness = backlight_get_max_brightness(backlight);
+ printf("Max backlight: %ld\n", max_brightness);
+
+ brightness = backlight_get_brightness(backlight);
+ printf("Cached backlight: %ld\n", brightness);
+
+ actual_brightness = backlight_get_actual_brightness(backlight);
+ printf("Hardware backlight: %ld\n", actual_brightness);
+
+ printf("normalized current brightness: %d\n",
+ get_normalized_backlight(backlight));
+
+ /* denormalized value */
+ new_blight = (blight * max_brightness) / 255;
+
+ backlight_set_brightness(backlight, new_blight);
+ printf("Setting brightness to: %ld (norm: %d)\n", new_blight, blight);
+
+ backlight_destroy(backlight);
+}
+
+int
+main(int argc, char **argv)
+{
+ int blight, connector_id;
+ const char *default_seat = "seat0";
+ const char *path, *device_seat;
+ struct udev *udev;
+ struct udev_enumerate *e;
+ struct udev_list_entry *entry;
+ struct udev_device *device, *drm_device;
+
+ if (argc < 3) {
+ printf("Please add connector_id and brightness values from 0-255\n");
+ return 1;
+ }
+
+ connector_id = atoi(argv[1]);
+ blight = atoi(argv[2]);
+
+ udev = udev_new();
+ if (udev == NULL) {
+ printf("failed to initialize udev context\n");
+ return 1;
+ }
+
+ e = udev_enumerate_new(udev);
+ udev_enumerate_add_match_subsystem(e, "drm");
+ udev_enumerate_add_match_sysname(e, "card[0-9]*");
+
+ udev_enumerate_scan_devices(e);
+ drm_device = NULL;
+ udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
+ path = udev_list_entry_get_name(entry);
+ device = udev_device_new_from_syspath(udev, path);
+ device_seat =
+ udev_device_get_property_value(device, "ID_SEAT");
+ if (!device_seat)
+ device_seat = default_seat;
+
+ drm_device = device;
+ break;
+ }
+
+ if (drm_device == NULL) {
+ printf("no drm device found\n");
+ return 1;
+ }
+
+ set_backlight(drm_device, connector_id, blight);
+
+ udev_device_unref(drm_device);
+ return 0;
+}