[PATCH igt] igt/gem_exec_parse: test_lri check init + add debug msg

[Robert Bragg <robert@sixbynine.org>]

Just to note I haven't tested yet as I don't have hsw to hand, but seems
simple enough to send out anyway...

--- >8 ---

To make it clear on failure what register was being tested the test_lri
helper now uses igt_debug to log the register address and value being
tested. The test_lri helper now also double checks that the initial
intel_register_write() takes before issuing the LRI.

Signed-off-by: Robert Bragg <robert@sixbynine.org>
---
 tests/gem_exec_parse.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/gem_exec_parse.c b/tests/gem_exec_parse.c
index cc2103a..534a933 100644
--- a/tests/gem_exec_parse.c
+++ b/tests/gem_exec_parse.c
@@ -272,8 +272,15 @@ test_lri(int fd, uint32_t handle,
 		MI_BATCH_BUFFER_END,
 	};
 
+	igt_debug("testing lri, reg=%x, val=%x, expected errno=%d\n",
+		  test->reg, test->test_val, expected_errno);
+
 	intel_register_write(test->reg, test->init_val);
 
+	igt_assert_eq_u32((intel_register_read(test->reg) &
+			   test->read_mask),
+			  test->init_val);
+
 	exec_batch(fd, handle,
 		   lri, sizeof(lri),
 		   I915_EXEC_RENDER,
-- 
2.10.2

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