[igt-dev] [PATCH i-g-t 6/6] DO_NOT_MERGE: Debug patch to cover DC IGT test.

[Anshuman Gupta <anshuman.gupta@intel.com>]

This patch make sure DC state IGT patches run on CI Bat test.
This patch print package c state counter also.

Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
---
 tests/i915/i915_pm_dc.c               | 51 +++++++++++++++++++++++++++
 tests/intel-ci/fast-feedback.testlist |  4 +++
 2 files changed, 55 insertions(+)

diff --git a/tests/i915/i915_pm_dc.c b/tests/i915/i915_pm_dc.c
index 576e32c7..c672e72e 100644
--- a/tests/i915/i915_pm_dc.c
+++ b/tests/i915/i915_pm_dc.c
@@ -61,6 +61,8 @@ typedef struct {
 } data_t;
 
 int msr_fd;
+int pmc_debugfs;
+bool pmc_loaded;
 
 bool dc_state_wait_entry(int drm_fd, int dc_flag, int prev_dc_count);
 void check_dc_counter(int drm_fd, int dc_flag, uint32_t prev_dc_count);
@@ -92,6 +94,49 @@ static bool supports_pc8_plus_residencies(void)
 	return true;
 }
 
+static bool setup_pmc(void)
+{
+	const char *debugfs_root;
+	char path[200];
+
+	/* Make sure our intel_pmc_core module is loaded. */
+	pmc_loaded = igt_kmod_is_loaded("intel_pmc_core");
+
+	if (!pmc_loaded)
+		pmc_loaded = igt_kmod_load("intel_pmc_core", NULL) == 0;
+
+	if (!pmc_loaded) {
+		igt_info("intel_pmc_core module not loaded\n");
+		return;
+	}
+
+	debugfs_root = igt_debugfs_mount();
+	igt_assert(debugfs_root);
+	snprintf(path, sizeof(path), "%s/pmc_core", debugfs_root);
+	pmc_debugfs = open(path, O_RDONLY);
+	igt_require(pmc_debugfs != -1);
+}
+
+static void dump_file(int dir, const char *filename)
+{
+	char *contents;
+
+	contents = igt_sysfs_get(dir, filename);
+	if (!contents)
+		return;
+
+	igt_info("%s:\n%s\n", filename, contents);
+	free(contents);
+}
+
+static void pmc_dump_file(int fd, const char *file)
+{
+	if (!pmc_loaded)
+		return;
+
+	dump_file(fd, file);
+}
+
 static void setup_output(data_t *data)
 {
 	igt_display_t *display = &data->display;
@@ -295,6 +340,9 @@ int main(int argc, char *argv[])
 		msr_fd = open("/dev/cpu/0/msr", O_RDONLY);
 		igt_assert_f(msr_fd >= 0,
 			     "Can't open /dev/cpu/0/msr.\n");
+		setup_pmc();
+		igt_info("Initial PC state residencies before test\n");
+		pmc_dump_file(pmc_debugfs, "package_cstate_show");
 	}
 
 	igt_subtest("dc5-psr") {
@@ -328,7 +376,10 @@ int main(int argc, char *argv[])
 	}
 
 	igt_fixture {
+		igt_info("PC state residencies after test\n");
+		pmc_dump_file(pmc_debugfs, "package_cstate_show");
 		close(data.debugfs_fd);
+		close(pmc_debugfs);
 		display_fini(&data);
 	}
 
diff --git a/tests/intel-ci/fast-feedback.testlist b/tests/intel-ci/fast-feedback.testlist
index 9b711946..f28c306d 100644
--- a/tests/intel-ci/fast-feedback.testlist
+++ b/tests/intel-ci/fast-feedback.testlist
@@ -229,6 +229,10 @@ igt@kms_setmode@basic-clone-single-crtc
 igt@i915_pm_backlight@basic-brightness
 igt@i915_pm_rpm@basic-pci-d3-state
 igt@i915_pm_rpm@basic-rte
+igt@i915_pm_dc@dc5-psr
+igt@i915_pm_dc@dc6-psr
+igt@i915_pm_dc@dc5-dpms
+igt@i915_pm_dc@dc6-dpms
 igt@i915_pm_rps@basic-api
 igt@prime_busy@basic-after-default
 igt@prime_busy@basic-before-default
-- 
2.21.0

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