[PATCH I-G-T 1/4] lib: Add PSR utility functions to igt library.

[Jim Bride <jim.bride@linux.intel.com>]

Factor out some code that was replicated in three test utilities into
some new IGT library functions so that we are checking PSR status in
a consistent fashion across all of our PSR tests.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Jim Bride <jim.bride@linux.intel.com>
---
 lib/Makefile.sources |   2 +
 lib/igt.h            |   1 +
 lib/igt_psr.c        | 147 +++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/igt_psr.h        |  38 +++++++++++++
 4 files changed, 188 insertions(+)
 create mode 100644 lib/igt_psr.c
 create mode 100644 lib/igt_psr.h

diff --git a/lib/Makefile.sources b/lib/Makefile.sources
index 6348487..0a8835b 100644
--- a/lib/Makefile.sources
+++ b/lib/Makefile.sources
@@ -83,6 +83,8 @@ lib_source_list =	 	\
 	uwildmat/uwildmat.c	\
 	igt_kmod.c		\
 	igt_kmod.h		\
+	igt_psr.c		\
+	igt_psr.h		\
 	$(NULL)
 
 if HAVE_CHAMELIUM
diff --git a/lib/igt.h b/lib/igt.h
index a97923e..7f52d6c 100644
--- a/lib/igt.h
+++ b/lib/igt.h
@@ -37,6 +37,7 @@
 #include "igt_gt.h"
 #include "igt_kms.h"
 #include "igt_pm.h"
+#include "igt_psr.h"
 #include "igt_stats.h"
 #include "igt_chamelium.h"
 #include "instdone.h"
diff --git a/lib/igt_psr.c b/lib/igt_psr.c
new file mode 100644
index 0000000..833a9d6
--- /dev/null
+++ b/lib/igt_psr.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * 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 (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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 <stdio.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <string.h>
+
+/**
+ * SECTION:igt_psr
+ * @short_description: Panel Self Refresh helpers
+ * @title: Panel Self Refresh
+ * @include: igt.h
+ *
+ * This library provides various helpers to enable Panel Self Refresh,
+ * as well as to check the state of PSR on the system (enabled vs.
+ * disabled, active vs. inactive) or to wait for PSR to be active
+ * or inactive.
+ */
+
+/**
+ * igt_psr_possible:
+ *
+ * Returns true if both the source and sink support PSR.
+ */
+bool igt_psr_possible(void)
+{
+	char buf[512];
+
+	igt_debugfs_read("i915_edp_psr_status", buf);
+
+	return strstr(buf, "Source_OK: yes\n") &&
+		strstr(buf, "Sink_Support: yes\n");
+}
+
+/**
+ * igt_psr_active:
+ *
+ * Returns true if PSR is active on the panel.
+ */
+bool igt_psr_active(void)
+{
+	char buf[512];
+	bool actret = false;
+	bool hwactret = false;
+
+	igt_debugfs_read("i915_edp_psr_status", buf);
+	hwactret = (strstr(buf, "HW Enabled & Active bit: yes\n") != NULL);
+	actret = (strstr(buf, "Active: yes\n") != NULL);
+	igt_debug("hwactret: %s actret: %s\n", hwactret ? "true" : "false",
+		 actret ? "true" : "false");
+	return hwactret && actret;
+}
+
+/**
+ * igt_psr_await_status:
+ * @active: A boolean that causes the function to wait for PSR to activate
+ *          if set to true, or to wait for PSR to deactivate if false.
+ *
+ * Returns true if the requested condition is met.
+ */
+bool igt_psr_await_status(bool active)
+{
+	const int timeout = 5;
+	int count = 0;
+	while (count < timeout) {
+		if (igt_psr_active() == active) {
+			igt_debug("PSR %s after %d seconds.\n",
+				  active ? "Active" : "Inactive", count);
+			return true;
+		}
+		count++;
+		sleep(1);
+	}
+	return false;
+}
+
+/**
+ * igt_psr_enabled:
+ *
+ * Returns true if the PSR feature is enabled.
+ */
+bool igt_psr_enabled(void)
+{
+	char buf[256];
+
+	igt_debugfs_read("i915_edp_psr_status", buf);
+	return strstr(buf, "Enabled: yes\n");
+}
+
+/**
+ * igt_psr_print_status:
+ *
+ * Dumps the contents of i915_edp_psr_status from debugfs.
+ */
+void igt_psr_print_status(void)
+{
+        char buf[256];
+
+        igt_debugfs_read("i915_edp_psr_status", buf);
+        igt_info("PSR status:\n%s\n", buf);
+}
+
+/**
+ * igt_psr_valid_connector:
+ * @connector: a drmModeConnector pointer to check
+ *
+ * Returns true if connector is an eDP connector.
+ */
+bool igt_psr_valid_connector(drmModeConnectorPtr connector)
+{
+	return (connector->connector_type == DRM_MODE_CONNECTOR_eDP);
+}
+
+/**
+ * igt_psr_sink_support:
+ *
+ * Returns true if the current eDP panel supports PSR.
+ */
+bool igt_psr_sink_support(void)
+{
+	char buf[256];
+
+	igt_debugfs_read("i915_edp_psr_status", buf);
+	return strstr(buf, "Sink_Support: yes\n");
+}
diff --git a/lib/igt_psr.h b/lib/igt_psr.h
new file mode 100644
index 0000000..9625e91
--- /dev/null
+++ b/lib/igt_psr.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * 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 (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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 IGT_PSR_H
+#define IGT_PSR_H
+
+#define igt_psr_enable() igt_set_module_param_int("enable_psr", 1)
+#define igt_psr_disable() igt_set_module_param_int("enable_psr", 0)
+
+bool igt_psr_possible(void);
+bool igt_psr_active(void);
+bool igt_psr_await_status(bool active);
+bool igt_psr_enabled(void);
+void igt_psr_print_status(void);
+bool igt_psr_valid_connector(drmModeConnectorPtr connector);
+bool igt_psr_sink_support(void);
+
+#endif /* IGT_PSR_H */
-- 
2.7.4

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