[igt-dev] [PATCH i-g-t] tests/i915/i915_pm_dc: Validate display enters to DC9 state

[Jigar Bhatt]

From: jbhatt <jigar.bhatt at intel.com>

Signed-off-by: jbhatt <jigar.bhatt at intel.com>
---
 tests/i915/i915_pm_dc.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tests/i915/i915_pm_dc.c b/tests/i915/i915_pm_dc.c
index 30c6024..679ac94 100644
--- a/tests/i915/i915_pm_dc.c
+++ b/tests/i915/i915_pm_dc.c
@@ -384,6 +384,25 @@ static void test_dc_state_dpms(data_t *data, int dc_flag)
 	cleanup_dc_dpms(data);
 }
 
+static bool check_dc9(uint32_t debugfs_fd, int prev_dc5, int prev_dc6)
+{
+        char buf[4096];
+        char *str;
+        igt_debugfs_simple_read(debugfs_fd, "i915_pm_req_res_info", buf, sizeof(buf));
+        str = strstr(buf, "DC9 Ready = ");
+        igt_assert_f((str&&strlen(str)>12&&str[12]=='y'&&strstr(str,"yes")), "Not in DC9 ready\n");
+        return igt_wait((read_dc_counter(debugfs_fd, CHECK_DC5)>prev_dc5 || read_dc_counter(debugfs_fd, CHECK_DC6)>prev_dc6),3000,100);
+}
+static void test_dc9_dpms(data_t *data)
+{
+        require_dc_counter(data->debugfs_fd, CHECK_DC5);
+        require_dc_counter(data->debugfs_fd, CHECK_DC6);
+        int dc5_prev=read_dc_counter(data->debugfs_fd, CHECK_DC5);
+        int dc6_prev=read_dc_counter(data->debugfs_fd, CHECK_DC6);
+        dpms_off(data);
+        igt_assert_f(check_dc9(data->debugfs_fd,dc5_prev,dc6_prev),"\n Not in DC9");
+        dpms_on(data);
+}
 IGT_TEST_DESCRIPTION("These tests validate Display Power DC states");
 int main(int argc, char *argv[])
 {
@@ -449,6 +468,10 @@ int main(int argc, char *argv[])
 		test_dc_state_dpms(&data, CHECK_DC6);
 	}
 
+	igt_describe("This test validates display engine entry to DC9 state");
+		igt_subtest("dc9-dpms") {
+                test_dc9_dpms(&data);
+        }
 	igt_fixture {
 		free(data.pwr_dmn_info);
 		close(data.debugfs_fd);
-- 
2.8.1