[igt-dev] [PATCH i-g-t 5/8] lib/psr: Add PSR2 functions

["José Roberto de Souza" <jose.souza@intel.com>]

Add the same kind of functions that we have for PSR1 but for PSR2 to
make easy write tests.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
---
 lib/igt_psr.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/igt_psr.h |  7 ++++
 2 files changed, 106 insertions(+)

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index c6d6390f..6232a77f 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c
@@ -144,3 +144,102 @@ bool psr_supported(int debugfs_fd)
 	return strstr(buf, "Sink_Support: yes\n") ||
 	       strstr(buf, "Sink support: yes");
 }
+
+static bool psr2_set(int debugfs_fd, bool enable)
+{
+	int ret;
+
+	ret = has_psr_debugfs(debugfs_fd);
+	/* Test PSR2 requires newer kernel that supports PSR debugfs api */
+	igt_require(ret == 0);
+
+	ret = psr_write(debugfs_fd, enable ? "0x2" : "0x1");
+	igt_assert(ret > 0);
+
+	/* Restore original value on exit */
+	if (psr_restore_debugfs_fd == -1) {
+		psr_restore_debugfs_fd = dup(debugfs_fd);
+		igt_assert(psr_restore_debugfs_fd >= 0);
+		igt_install_exit_handler(restore_psr_debugfs);
+	}
+
+	return ret;
+}
+
+bool psr2_enable(int debugfs_fd)
+{
+	return psr2_set(debugfs_fd, true);
+}
+
+bool psr2_disable(int debugfs_fd)
+{
+	return psr2_set(debugfs_fd, false);
+}
+
+bool psr2_supported(int debugfs_fd)
+{
+	char buf[PSR_STATUS_MAX_LEN];
+
+	igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status", buf,
+				sizeof(buf));
+	return strstr(buf, "Sink support: yes [0x00000003]");
+}
+
+static bool psr2_in_deep_sleep(int debugfs_fd)
+{
+	bool active;
+	char buf[PSR_STATUS_MAX_LEN];
+
+	igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status", buf,
+				sizeof(buf));
+
+	active = strstr(buf, "Status: PSR2 enabled") &&
+		 strstr(buf, "Source PSR ctl: enabled") &&
+		 strstr(buf, "Source PSR status: DEEP_SLEEP");
+
+	return active;
+}
+
+static bool psr2_disabled(int debugfs_fd)
+{
+	char buf[PSR_STATUS_MAX_LEN];
+
+	igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status", buf,
+				sizeof(buf));
+
+	return strstr(buf, "Status: disabled");
+}
+
+bool psr2_wait_deep_sleep(int debugfs_fd)
+{
+	/*
+	 * DEEP_SLEEP is only achieved after 15 idle frames so the timeout
+	 * needs to be this long to avoid test fail in 30hz modesets
+	 */
+	return igt_wait(psr2_in_deep_sleep(debugfs_fd), 1000, 20);
+}
+
+bool psr2_wait_disable(int debugfs_fd)
+{
+	return igt_wait(psr2_disabled(debugfs_fd), 40, 10);
+}
+
+static bool psr2_status_update(int debugfs_fd)
+{
+	char buf[PSR_STATUS_MAX_LEN];
+
+	igt_debugfs_simple_read(debugfs_fd, "i915_edp_psr_status", buf,
+			        sizeof(buf));
+
+	/*
+	 * As it waits for DEEP_SLEEP state when enabling PSR2 any state
+	 * different than it means that PSR2 hardware is working in update
+	 * the sink
+	 */
+	return !strstr(buf, "Source PSR status: DEEP_SLEEP");
+}
+
+bool psr2_wait_update(int debugfs_fd)
+{
+	return igt_wait(psr2_status_update(debugfs_fd), 40, 10);
+}
diff --git a/lib/igt_psr.h b/lib/igt_psr.h
index a4fcf325..cabe8687 100644
--- a/lib/igt_psr.h
+++ b/lib/igt_psr.h
@@ -34,4 +34,11 @@ bool psr_enable(int debugfs_fd);
 bool psr_disable(int debugfs_fd);
 bool psr_supported(int debugfs_fd);
 
+bool psr2_wait_deep_sleep(int debugfs_fd);
+bool psr2_wait_update(int debugfs_fd);
+bool psr2_wait_disable(int debugfs_fd);
+bool psr2_enable(int debugfs_fd);
+bool psr2_disable(int debugfs_fd);
+bool psr2_supported(int debugfs_fd);
+
 #endif
-- 
2.19.2

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