[igt-dev] [i-g-t V2 79/81] tests/kms_writeback: Document each subtest for testplan

[Bhanuprakash Modem]

Add documentation for all kms tests which is used by IGT testplan
documentation.

Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
---
 tests/kms_writeback.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/tests/kms_writeback.c b/tests/kms_writeback.c
index c4808b02c..ee3c5dba1 100644
--- a/tests/kms_writeback.c
+++ b/tests/kms_writeback.c
@@ -32,6 +32,48 @@
 #include "igt_core.h"
 #include "igt_fb.h"
 #include "sw_sync.h"
+/**
+ * TEST: kms writeback
+ * Category: Display
+ * Description: This test validates the expected behavior of the writeback
+ *              connectors feature by checking if the target device support
+ *              writeback; it validates bad and good combination, check color
+ *              format, and check the output result by using CRC.
+ *
+ * SUBTEST: writeback-check-output
+ * Description: Check writeback output with CRC validation
+ * Driver requirement: any
+ * Functionality: kms_core
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ *
+ * SUBTEST: writeback-fb-id
+ * Description: Validate WRITEBACK_FB_ID with valid and invalid options
+ * Driver requirement: any
+ * Functionality: kms_core
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ *
+ * SUBTEST: writeback-invalid-parameters
+ * Description: Writeback has a couple of parameters linked together(output
+ *              framebuffer and fence); this test goes throughthe combination
+ *              of possible bad options
+ * Driver requirement: any
+ * Functionality: kms_core
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ *
+ * SUBTEST: writeback-pixel-formats
+ * Description: Check the writeback format
+ * Driver requirement: any
+ * Functionality: kms_core
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ */
 
 IGT_TEST_DESCRIPTION(
    "This test validates the expected behavior of the writeback connectors "
-- 
2.40.0