1 files changed, 363 insertions, 0 deletions
diff --git a/tests/amdgpu/amd_abm.c b/tests/amdgpu/amd_abm.c
new file mode 100644
index 00000000..363b1e90
--- /dev/null
+++ b/tests/amdgpu/amd_abm.c
@@ -0,0 +1,363 @@
+/*
+ * Copyright 2018 Advanced Micro Devices, 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, 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 "igt.h"
+#include "drmtest.h"
+#include "igt_kms.h"
+#include <limits.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <time.h>
+
+#define BACKLIGHT_PATH "/sys/class/backlight/amdgpu_bl0"
+
+static int read_current_backlight_pwm(int debugfs_dir)
+{
+	char buf[20];
+
+	igt_debugfs_simple_read(debugfs_dir, "amdgpu_current_backlight_pwm",
+			 buf, sizeof(buf));
+
+	return strtol(buf, NULL, 0);
+}
+
+static int read_target_backlight_pwm(int debugfs_dir)
+{
+	char buf[20];
+
+	igt_debugfs_simple_read(debugfs_dir, "amdgpu_target_backlight_pwm",
+			 buf, sizeof(buf));
+
+	return strtol(buf, NULL, 0);
+}
+
+static int backlight_write_brightness(int value)
+{
+	int fd;
+	char full[PATH_MAX];
+	char src[64];
+	int len;
+
+	igt_assert(snprintf(full, PATH_MAX, "%s/%s", BACKLIGHT_PATH, "brightness") < PATH_MAX);
+	fd = open(full, O_WRONLY);
+	if (fd == -1)
+		return -errno;
+
+	len = snprintf(src, sizeof(src), "%i", value);
+	len = write(fd, src, len);
+	close(fd);
+
+	if (len < 0)
+		return len;
+
+	return 0;
+}
+
+static void set_abm_level(igt_display_t *display, int level)
+{
+	int i, ret;
+	int output_id;
+	drmModeObjectPropertiesPtr props;
+	uint32_t prop_id;
+	drmModePropertyPtr prop;
+	uint32_t type = DRM_MODE_OBJECT_CONNECTOR;
+
+	for (i = 0; i < display->n_outputs; i++) {
+		output_id = display->outputs[i].id;
+		props = drmModeObjectGetProperties(display->drm_fd, output_id, type);
+
+		for (i = 0; i < props->count_props; i++) {
+			prop_id = props->props[i];
+			prop = drmModeGetProperty(display->drm_fd, prop_id);
+
+			igt_assert(prop);
+
+			if (strcmp(prop->name, "abm level") == 0) {
+				ret = drmModeObjectSetProperty(display->drm_fd, output_id, type, prop_id, level);
+
+				igt_assert_eq(ret, 0);
+			}
+
+			drmModeFreeProperty(prop);
+		}
+	}
+
+}
+
+static int backlight_read_max_brightness(int *result)
+{
+	int fd;
+	char full[PATH_MAX];
+	char dst[64];
+	int r, e;
+
+	igt_assert(snprintf(full, PATH_MAX, "%s/%s", BACKLIGHT_PATH, "max_brightness") < PATH_MAX);
+
+	fd = open(full, O_RDONLY);
+	if (fd == -1)
+		return -errno;
+
+	r = read(fd, dst, sizeof(dst));
+	e = errno;
+	close(fd);
+
+	if (r < 0)
+		return -e;
+
+	errno = 0;
+	*result = strtol(dst, NULL, 10);
+	return errno;
+}
+
+static void skip_if_incompatible(igt_display_t *display, int debugfs_dir)
+{
+	int ret, i;
+	char buf[20];
+	bool abm_prop_exists;
+	int output_id;
+	drmModeObjectPropertiesPtr props;
+	uint32_t type = DRM_MODE_OBJECT_CONNECTOR;
+	uint32_t prop_id;
+	drmModePropertyPtr prop;
+
+	ret = igt_debugfs_simple_read(debugfs_dir, "amdgpu_current_backlight_pwm",
+			 buf, sizeof(buf));
+
+	if (ret < 0)
+		igt_skip("No current backlight debugfs entry.\n");
+
+	ret = igt_debugfs_simple_read(debugfs_dir, "amdgpu_target_backlight_pwm",
+			 buf, sizeof(buf));
+
+	if (ret < 0)
+		igt_skip("No target backlight debugfs entry.\n");
+
+	abm_prop_exists = false;
+
+	for (i = 0; i < display->n_outputs; i++) {
+		output_id = display->outputs[i].id;
+		props = drmModeObjectGetProperties(display->drm_fd, output_id, type);
+
+		for (i = 0; i < props->count_props; i++) {
+			prop_id = props->props[i];
+			prop = drmModeGetProperty(display->drm_fd, prop_id);
+
+			if (strcmp(prop->name, "abm level") == 0)
+				abm_prop_exists = true;
+
+			drmModeFreeProperty(prop);
+		}
+	}
+
+	if (!abm_prop_exists)
+		igt_skip("No abm level property on any connector.\n");
+}
+
+
+static void backlight_dpms_cycle(igt_display_t *display, int debugfs, igt_output_t *output)
+{
+	int ret;
+	int max_brightness;
+	int pwm_1, pwm_2;
+
+	ret = backlight_read_max_brightness(&max_brightness);
+	igt_assert_eq(ret, 0);
+
+	set_abm_level(display, 0);
+	backlight_write_brightness(max_brightness / 2);
+	usleep(100000);
+	pwm_1 = read_target_backlight_pwm(debugfs);
+
+	kmstest_set_connector_dpms(display->drm_fd, output->config.connector, DRM_MODE_DPMS_OFF);
+	kmstest_set_connector_dpms(display->drm_fd, output->config.connector, DRM_MODE_DPMS_ON);
+	usleep(100000);
+	pwm_2 = read_target_backlight_pwm(debugfs);
+	igt_assert_eq(pwm_1, pwm_2);
+}
+
+static void backlight_monotonic_basic(igt_display_t *display, int debugfs)
+{
+	int ret;
+	int max_brightness;
+	int prev_pwm, pwm;
+	int brightness_step;
+	int brightness;
+
+	ret = backlight_read_max_brightness(&max_brightness);
+	igt_assert_eq(ret, 0);
+
+	brightness_step = max_brightness / 10;
+
+	set_abm_level(display, 0);
+	backlight_write_brightness(max_brightness);
+	usleep(100000);
+	prev_pwm = read_target_backlight_pwm(debugfs);
+	for (brightness = max_brightness - brightness_step;
+	     brightness > 0;
+	     brightness -= brightness_step) {
+		backlight_write_brightness(brightness);
+		usleep(100000);
+		pwm = read_target_backlight_pwm(debugfs);
+		igt_assert(pwm < prev_pwm);
+		prev_pwm = pwm;
+	}
+
+}
+
+static void backlight_monotonic_abm(igt_display_t *display, int debugfs)
+{
+	int ret, i;
+	int max_brightness;
+	int prev_pwm, pwm;
+	int brightness_step;
+	int brightness;
+
+	ret = backlight_read_max_brightness(&max_brightness);
+	igt_assert_eq(ret, 0);
+
+	brightness_step = max_brightness / 10;
+	for (i = 1; i < 5; i++) {
+		set_abm_level(display, i);
+		backlight_write_brightness(max_brightness);
+		usleep(100000);
+		prev_pwm = read_target_backlight_pwm(debugfs);
+		for (brightness = max_brightness - brightness_step;
+		     brightness > 0;
+		     brightness -= brightness_step) {
+			backlight_write_brightness(brightness);
+			usleep(100000);
+			pwm = read_target_backlight_pwm(debugfs);
+			igt_assert(pwm < prev_pwm);
+			prev_pwm = pwm;
+		}
+	}
+}
+
+static void abm_enabled(igt_display_t *display, int debugfs)
+{
+	int ret, i;
+	int max_brightness;
+	int pwm, prev_pwm, pwm_without_abm;
+
+	ret = backlight_read_max_brightness(&max_brightness);
+	igt_assert_eq(ret, 0);
+
+	set_abm_level(display, 0);
+	backlight_write_brightness(max_brightness);
+	usleep(100000);
+	prev_pwm = read_target_backlight_pwm(debugfs);
+	pwm_without_abm = prev_pwm;
+
+	for (i = 1; i < 5; i++) {
+		set_abm_level(display, i);
+		usleep(100000);
+		pwm = read_target_backlight_pwm(debugfs);
+		igt_assert(pwm <= prev_pwm);
+		igt_assert(pwm < pwm_without_abm);
+		prev_pwm = pwm;
+	}
+
+}
+
+static void abm_gradual(igt_display_t *display, int debugfs)
+{
+	int ret, i;
+	int convergence_delay = 15;
+	int prev_pwm, pwm, curr;
+	int max_brightness;
+
+	ret = backlight_read_max_brightness(&max_brightness);
+
+	igt_assert_eq(ret, 0);
+
+	set_abm_level(display, 0);
+	backlight_write_brightness(max_brightness);
+
+	sleep(convergence_delay);
+	prev_pwm = read_target_backlight_pwm(debugfs);
+	curr = read_current_backlight_pwm(debugfs);
+
+	igt_assert_eq(prev_pwm, curr);
+	set_abm_level(display, 4);
+	for (i = 0; i < 10; i++) {
+		usleep(100000);
+		pwm = read_current_backlight_pwm(debugfs);
+		igt_assert(pwm < prev_pwm);
+		prev_pwm = pwm;
+	}
+
+	sleep(convergence_delay - 1);
+
+	prev_pwm = read_target_backlight_pwm(debugfs);
+	curr = read_current_backlight_pwm(debugfs);
+
+	igt_assert_eq(prev_pwm, curr);
+}
+
+igt_main
+{
+	igt_display_t display;
+	int debugfs;
+	enum pipe pipe;
+	igt_output_t *output;
+
+	igt_skip_on_simulation();
+
+	igt_fixture {
+		display.drm_fd = drm_open_driver_master(DRIVER_AMDGPU);
+
+		if (display.drm_fd == -1)
+			igt_skip("Not an amdgpu driver.\n");
+
+		debugfs = igt_debugfs_dir(display.drm_fd);
+
+		kmstest_set_vt_graphics_mode();
+
+		igt_display_require(&display, display.drm_fd);
+
+		skip_if_incompatible(&display, debugfs);
+
+		for_each_pipe_with_valid_output(&display, pipe, output) {
+			if (output->config.connector->connector_type == DRM_MODE_CONNECTOR_eDP)
+				break;
+		}
+	}
+
+	igt_subtest("dpms_cycle")
+		backlight_dpms_cycle(&display, debugfs, output);
+	igt_subtest("backlight_monotonic_basic")
+		backlight_monotonic_basic(&display, debugfs);
+	igt_subtest("backlight_monotonic_abm")
+		backlight_monotonic_abm(&display, debugfs);
+	igt_subtest("abm_enabled")
+		abm_enabled(&display, debugfs);
+	igt_subtest("abm_gradual")
+		abm_gradual(&display, debugfs);
+
+	igt_fixture {
+		igt_display_fini(&display);
+	}
+}