[igt-dev] [PATCH i-g-t] tests/i915/i915_pm_backlight: Add new subtest to validate dual panel backlight

* [igt-dev] [PATCH i-g-t] tests/i915/i915_pm_backlight: Add new subtest to validate dual panel backlight
@ 2022-11-02 17:08 Nidhi Gupta
  2022-11-02 17:33 ` [igt-dev] ✗ GitLab.Pipeline: warning for tests/i915/i915_pm_backlight: Add new subtest to validate dual panel backlight (rev5) Patchwork
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: Nidhi Gupta @ 2022-11-02 17:08 UTC (permalink / raw)
  To: igt-dev; +Cc: Nidhi Gupta

Since driver can now support multiple eDPs and Debugfs structure for
backlight changed per connector the test should then iterate through
all eDP connectors.

Signed-off-by: Nidhi Gupta <nidhi1.gupta@intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
---
 tests/i915/i915_pm_backlight.c | 208 ++++++++++++++++++++++++++++-------------
 1 file changed, 144 insertions(+), 64 deletions(-)

diff --git a/tests/i915/i915_pm_backlight.c b/tests/i915/i915_pm_backlight.c
index cafae7f..54e51b7 100644
--- a/tests/i915/i915_pm_backlight.c
+++ b/tests/i915/i915_pm_backlight.c
@@ -34,29 +34,39 @@
 #include <errno.h>
 #include <unistd.h>
 #include <time.h>
+#include "igt_device.h"
+#include "igt_device_scan.h"
 
 struct context {
 	int max;
+	igt_output_t *output;
+	char path[PATH_MAX];
 };
 
+enum {
+	TEST_NONE = 0,
+	TEST_DPMS,
+	TEST_SUSPEND,
+};
 
 #define TOLERANCE 5 /* percent */
-#define BACKLIGHT_PATH "/sys/class/backlight/intel_backlight"
+#define BACKLIGHT_PATH "/sys/class/backlight"
 
 #define FADESTEPS 10
 #define FADESPEED 100 /* milliseconds between steps */
 
+#define NUM_EDP_OUTPUTS 2
+
 IGT_TEST_DESCRIPTION("Basic backlight sysfs test");
 
-static int backlight_read(int *result, const char *fname)
+static int backlight_read(int *result, const char *fname, struct context *context)
 {
 	int fd;
 	char full[PATH_MAX];
-	char dst[64];
+	char dst[512];
 	int r, e;
 
-	igt_assert(snprintf(full, PATH_MAX, "%s/%s", BACKLIGHT_PATH, fname) < PATH_MAX);
-
+	igt_assert(snprintf(full, PATH_MAX, "%s/%s/%s", BACKLIGHT_PATH, context->path, fname) < PATH_MAX);
 	fd = open(full, O_RDONLY);
 	if (fd == -1)
 		return -errno;
@@ -73,14 +83,14 @@ static int backlight_read(int *result, const char *fname)
 	return errno;
 }
 
-static int backlight_write(int value, const char *fname)
+static int backlight_write(int value, const char *fname, struct context *context)
 {
 	int fd;
 	char full[PATH_MAX];
 	char src[64];
 	int len;
 
-	igt_assert(snprintf(full, PATH_MAX, "%s/%s", BACKLIGHT_PATH, fname) < PATH_MAX);
+	igt_assert(snprintf(full, PATH_MAX, "%s/%s/%s", BACKLIGHT_PATH, context->path, fname) < PATH_MAX);
 	fd = open(full, O_WRONLY);
 	if (fd == -1)
 		return -errno;
@@ -100,12 +110,12 @@ static void test_and_verify(struct context *context, int val)
 	const int tolerance = val * TOLERANCE / 100;
 	int result;
 
-	igt_assert_eq(backlight_write(val, "brightness"), 0);
-	igt_assert_eq(backlight_read(&result, "brightness"), 0);
+	igt_assert_eq(backlight_write(val, "brightness", context), 0);
+	igt_assert_eq(backlight_read(&result, "brightness", context), 0);
 	/* Check that the exact value sticks */
 	igt_assert_eq(result, val);
 
-	igt_assert_eq(backlight_read(&result, "actual_brightness"), 0);
+	igt_assert_eq(backlight_read(&result, "actual_brightness", context), 0);
 	/* Some rounding may happen depending on hw */
 	igt_assert_f(result >= max(0, val - tolerance) &&
 		     result <= min(context->max, val + tolerance),
@@ -124,16 +134,16 @@ static void test_bad_brightness(struct context *context)
 {
 	int val;
 	/* First write some sane value */
-	backlight_write(context->max / 2, "brightness");
+	backlight_write(context->max / 2, "brightness", context);
 	/* Writing invalid values should fail and not change the value */
-	igt_assert_lt(backlight_write(-1, "brightness"), 0);
-	backlight_read(&val, "brightness");
+	igt_assert_lt(backlight_write(-1, "brightness", context), 0);
+	backlight_read(&val, "brightness", context);
 	igt_assert_eq(val, context->max / 2);
-	igt_assert_lt(backlight_write(context->max + 1, "brightness"), 0);
-	backlight_read(&val, "brightness");
+	igt_assert_lt(backlight_write(context->max + 1, "brightness", context), 0);
+	backlight_read(&val, "brightness", context);
 	igt_assert_eq(val, context->max / 2);
-	igt_assert_lt(backlight_write(INT_MAX, "brightness"), 0);
-	backlight_read(&val, "brightness");
+	igt_assert_lt(backlight_write(INT_MAX, "brightness", context), 0);
+	backlight_read(&val, "brightness", context);
 	igt_assert_eq(val, context->max / 2);
 }
 
@@ -154,7 +164,7 @@ static void test_fade(struct context *context)
 }
 
 static void
-test_fade_with_dpms(struct context *context, igt_output_t *output)
+check_dpms(igt_output_t *output)
 {
 	igt_require(igt_setup_runtime_pm(output->display->drm_fd));
 
@@ -167,33 +177,77 @@ test_fade_with_dpms(struct context *context, igt_output_t *output)
 				   output->config.connector,
 				   DRM_MODE_DPMS_ON);
 	igt_assert(igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_ACTIVE));
-
-	test_fade(context);
 }
 
 static void
-test_fade_with_suspend(struct context *context, igt_output_t *output)
+check_suspend(igt_output_t *output)
 {
 	igt_system_suspend_autoresume(SUSPEND_STATE_MEM, SUSPEND_TEST_NONE);
+}
 
-	test_fade(context);
+static void test_cleanup(igt_display_t *display, igt_output_t *output)
+{
+	igt_output_set_pipe(output, PIPE_NONE);
+	igt_display_commit2(display, display->is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);
+	igt_pm_restore_sata_link_power_management();
+}
+
+static void test_setup(igt_display_t display, igt_output_t *output)
+{
+	igt_plane_t *primary;
+	drmModeModeInfo *mode;
+	struct igt_fb fb;
+	enum pipe pipe;
+
+	igt_display_reset(&display);
+
+	for_each_pipe(&display, pipe) {
+		if (!igt_pipe_connector_valid(pipe, output))
+			continue;
+
+		igt_output_set_pipe(output, pipe);
+		mode = igt_output_get_mode(output);
+
+		igt_create_pattern_fb(display.drm_fd,
+				      mode->hdisplay, mode->vdisplay,
+				      DRM_FORMAT_XRGB8888,
+				      DRM_FORMAT_MOD_LINEAR, &fb);
+		primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+		igt_plane_set_fb(primary, &fb);
+
+		igt_display_commit2(&display, display.is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);
+		igt_pm_enable_sata_link_power_management();
+
+		break;
+	}
 }
 
 igt_main
 {
-	struct context context = {0};
-	int old;
+	int old, fd;
+	int i = 0;
 	igt_display_t display;
 	igt_output_t *output;
-	struct igt_fb fb;
+	char file_path_n[PATH_MAX] = "";
+	bool dual_edp = false;
+	struct context contexts[NUM_EDP_OUTPUTS];
+	struct {
+		const char *name;
+		const char *desc;
+		void (*test_t) (struct context *);
+		int flags;
+	} tests[] = {
+		{ "basic-brightness", "desc", test_brightness, TEST_NONE },
+		{ "bad-brightness", "desc", test_bad_brightness, TEST_NONE },
+		{ "fade", "desc", test_fade, TEST_NONE },
+		{ "fade-with-dpms", "desc", test_fade, TEST_DPMS },
+		{ "fade-with-suspend", "desc", test_fade, TEST_SUSPEND },
+	};
 
 	igt_fixture {
-		enum pipe pipe;
 		bool found = false;
 		char full_name[32] = {};
 		char *name;
-		drmModeModeInfo *mode;
-		igt_plane_t *primary;
 
 		/*
 		 * Backlight tests requires the output to be enabled,
@@ -202,56 +256,82 @@ igt_main
 		kmstest_set_vt_graphics_mode();
 		igt_display_require(&display, drm_open_driver(DRIVER_INTEL));
 
-		/* Get the max value and skip the whole test if sysfs interface not available */
-		igt_skip_on(backlight_read(&old, "brightness"));
-		igt_assert(backlight_read(&context.max, "max_brightness") > -1);
+		for_each_connected_output(&display, output) {
+			if (output->config.connector->connector_type != DRM_MODE_CONNECTOR_eDP)
+				continue;
 
-		/* should be ../../cardX-$output */
-		igt_assert_lt(12, readlink(BACKLIGHT_PATH "/device", full_name, sizeof(full_name) - 1));
-		name = basename(full_name);
+			if (found)
+				snprintf(file_path_n, PATH_MAX, "%s/card%i-%s-backlight/brightness",
+					 BACKLIGHT_PATH, igt_device_get_card_index(display.drm_fd),
+					 igt_output_name(output));
+			else
+				snprintf(file_path_n, PATH_MAX, "%s/intel_backlight/brightness", BACKLIGHT_PATH);
 
-		for_each_pipe_with_valid_output(&display, pipe, output) {
-			if (strcmp(name + 6, output->name))
+			fd = open(file_path_n, O_RDONLY);
+			if (fd == -1) {
 				continue;
-			found = true;
-			break;
+			}
+			if (found)
+				snprintf(contexts[i].path, PATH_MAX, "card%i-%s-backlight",
+					 igt_device_get_card_index(display.drm_fd),
+					 igt_output_name(output));
+			else
+				snprintf(contexts[i].path, PATH_MAX, "intel_backlight");
+
+			close(fd);
+
+			/* should be ../../cardX-$output */
+			snprintf(file_path_n, PATH_MAX, "%s/%s/device", BACKLIGHT_PATH, contexts[i].path);
+			igt_assert_lt(16, readlink(file_path_n, full_name, sizeof(full_name) - 1));
+			name = basename(full_name);
+
+			if (!strcmp(name + 6, output->name)) {
+				contexts[i++].output = output;
+
+				if (found)
+					dual_edp = true;
+				else
+					found = true;
+			}
 		}
+		igt_require_f(found, "No valid output found.\n");
+	}
 
-		igt_require_f(found,
-			      "Could not map backlight for \"%s\" to connected output\n",
-			      name);
+	for (i = 0; i < ARRAY_SIZE(tests); i++) {
+		igt_describe(tests[i].desc);
+		igt_subtest_with_dynamic(tests[i].name) {
+			for (int j = 0; j < (dual_edp ? 2 : 1); j++) {
+				test_setup(display, &contexts->output[j]);
 
-		igt_output_set_pipe(output, pipe);
-		mode = igt_output_get_mode(output);
+				if (backlight_read(&old, "brightness", &contexts[j]))
+					continue;
 
-		igt_create_pattern_fb(display.drm_fd,
-				      mode->hdisplay, mode->vdisplay,
-				      DRM_FORMAT_XRGB8888,
-				      DRM_FORMAT_MOD_LINEAR, &fb);
-		primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
-		igt_plane_set_fb(primary, &fb);
+				igt_assert(backlight_read(&contexts[j].max, "max_brightness", &contexts[j]) > -1);
 
-		igt_display_commit2(&display, display.is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);
-		igt_pm_enable_sata_link_power_management();
-	}
+				if (tests[i].flags == TEST_DPMS)
+					check_dpms(contexts[j].output);
 
-	igt_subtest("basic-brightness")
-		test_brightness(&context);
-	igt_subtest("bad-brightness")
-		test_bad_brightness(&context);
-	igt_subtest("fade")
-		test_fade(&context);
-	igt_subtest("fade_with_dpms")
-		test_fade_with_dpms(&context, output);
-	igt_subtest("fade_with_suspend")
-		test_fade_with_suspend(&context, output);
+				if (tests[i].flags == TEST_SUSPEND)
+					check_suspend(contexts[j].output);
+
+				igt_dynamic_f("%s", igt_output_name(contexts[j].output)) {
+					igt_assert(backlight_read(&contexts[j].max, "max_brightness", &contexts[j]) > -1);
+					tests[i].test_t(&contexts[j]);
+				}
+
+				test_cleanup(&display, output);
+			}
+			/* TODO: Add tests for dual eDP. */
+		}
+	}
 
 	igt_fixture {
 		/* Restore old brightness */
-		backlight_write(old, "brightness");
+		for (int j = 0; j < (dual_edp ? 2 : 1); j++) {
+			backlight_write(old, "brightness", &contexts[j]);
+		}
 
 		igt_display_fini(&display);
-		igt_remove_fb(display.drm_fd, &fb);
 		igt_pm_restore_sata_link_power_management();
 		close(display.drm_fd);
 	}
-- 
1.9.1

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