screens-disabled test is only valid for the plaforms like HSW/BDW
where PG1 is Always-ON power domain, so these platform test lpsp
with all screen disabled i.e validate PG2 when all screen are
disabled.
DC state i.e DMC f/w supported platforms don't have any ROI to validate
screen-disabled subtest as existing dc*-dpms i915_pm_dc subtest
already validate it implicitly.
This should save some CI-Cycles.

Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
---
 tests/i915/i915_pm_lpsp.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tests/i915/i915_pm_lpsp.c b/tests/i915/i915_pm_lpsp.c
index 8d2e23fe..56980de2 100644
--- a/tests/i915/i915_pm_lpsp.c
+++ b/tests/i915/i915_pm_lpsp.c
@@ -172,8 +172,11 @@ igt_main
 	}
 
 	igt_describe("This test validates lpsp while all crtc are disabled");
-	igt_subtest("screens-disabled")
+	igt_subtest("screens-disabled") {
+		igt_skip_on_f(openat(data.debugfs_fd, "i915_dmc_info", O_RDONLY) > 0,
+			      "DC states supported platform don't have ROI for this subtest\n");
 		screens_disabled_subtest(&data);
+	}

I agree from gen9 onward dmc support is present and same time we have multiple power-well having different pipe.
To avoid platform specific change I feel ok to check dmc info. Changes looks good to me.
Can you please club together the changes of this patch with previous one (3/6) where screens_disabled_subtest is implemented to give a better clarity on which platform it is targeted for.

Regards,
Animesh 
 

 
 	igt_describe("This test validates lpsp on all connected outputs on low power PIPE_A");
 	igt_subtest_with_dynamic_f("kms-lpsp") {