[igt-dev] [PATCH i-g-t 5/6] tests/i915/i915_pm_dc: Added test for DC6 during DPMS

[Anshuman Gupta]

From: Jyoti Yadav <jyoti.r.yadav at intel.com>

Added new subtest for DC6 entry during DPMS on/off cycle.
During DPMS on/off cycle DC6 counter is incremented.

v2: Renamed the subtest name.
v3: Rebased.
v4: Addressed review comment by replacing igt_display_init() to
    igt_display_require(), changes got done in patch set 2.
v5: Addressed the review comment by removing redundant read_dc_counter()
    suggested by Imre.
    Listing actual change in patch set changelog to make review easier.
v6: Rebased due to test name pm_dc changed to i915_pm_dc, aligning to
    other PM tests.
v7: Introduced setup_dc_dpms() inorder to disable i915 runtime PM for
    the platform supports DC9.

Signed-off-by: Jyoti Yadav <jyoti.r.yadav at intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
---
 tests/i915/i915_pm_dc.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/i915/i915_pm_dc.c b/tests/i915/i915_pm_dc.c
index 5300d273..576e32c7 100644
--- a/tests/i915/i915_pm_dc.c
+++ b/tests/i915/i915_pm_dc.c
@@ -320,6 +320,13 @@ int main(int argc, char *argv[])
 		test_dc_state_dpms(&data, CHECK_DC5);
 	}
 
+	igt_subtest("dc6-dpms") {
+		setup_dc_dpms(&data);
+		igt_require_f(supports_pc8_plus_residencies(),
+			      "PC8+ residencies not supported\n");
+		test_dc_state_dpms(&data, CHECK_DC6);
+	}
+
 	igt_fixture {
 		close(data.debugfs_fd);
 		display_fini(&data);
-- 
2.21.0