[igt-dev] [PATCH i-g-t 3/3] tests/i915/kms_dsc: Add test summary

[Swati Sharma <swati2.sharma@intel.com>]

Add test summary giving overall view of what all is being validated
in the test.

Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
---
 tests/i915/kms_dsc.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tests/i915/kms_dsc.c b/tests/i915/kms_dsc.c
index 8aaec288..cbb77d6a 100644
--- a/tests/i915/kms_dsc.c
+++ b/tests/i915/kms_dsc.c
@@ -34,6 +34,25 @@
 
 IGT_TEST_DESCRIPTION("Test to validate display stream compression");
 
+/*
+ * Starting from gen11+, i915 driver supports DSC1.1. For validating
+ * DSC, the first step is to verify if the sink supports DSC.
+ * If the sink does support DSC, we will validate the following
+ * scenarios:
+ * (i) basic modeset (ii) input bpc (iii) pixel formats
+ * (iv) output formats (v) fractional bpp
+ * In the basic subtest, we perform modeset with default parameters.
+ * Input bpc and pixel formats subtests, we perform modeset
+ * with different input bpc (12/10/8) and pixel formats (YUV/RGB),
+ * respectively. With the support of DSC1.2 from MTL, we can
+ * verify fractional bpp and DSC YCBCR420 output format. The tests
+ * are executed with the RGB444 output format by default. However,
+ * in the output-format subtest, we verify output formats
+ * (RGB/YCBCR444/YCBCR420). Finally, we also test fractional bpp
+ * with default parameter. In this, driver will ignore integer
+ * compressed bpp value and will do modeset with fractional bpp only.
+ */
+
 enum dsc_test_type {
 	TEST_DSC_BASIC,
 	TEST_DSC_BPC,
-- 
2.25.1