[igt-dev] [i-g-t V6 34/81] tests/kms_atomic: 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>
Reviewed-by: Nidhi Gupta <nidhi1.gupta at intel.com>
---
 tests/kms_atomic.c | 102 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 100 insertions(+), 2 deletions(-)

diff --git a/tests/kms_atomic.c b/tests/kms_atomic.c
index b65045abc..5550ea12d 100644
--- a/tests/kms_atomic.c
+++ b/tests/kms_atomic.c
@@ -27,8 +27,10 @@
  *    Pekka Paalanen <pekka.paalanen at collabora.co.uk>
  */
 
-/*
- * Testcase: testing atomic modesetting API
+/**
+ * TEST: kms atomic
+ * Category: Display
+ * Description: Test atomic modesetting API
  */
 
 #include <unistd.h>
@@ -287,6 +289,16 @@ static uint32_t plane_get_igt_format(igt_plane_t *plane)
 	return 0;
 }
 
+/**
+ * SUBTEST: plane-primary-overlay-mutable-zpos
+ * Description: Verify that the overlay plane can cover the primary one (and
+ *              vice versa) by changing their zpos property.
+ * Driver requirement: any
+ * Functionality: kms_core, plane
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ */
 static void
 plane_primary_overlay_mutable_zpos(igt_pipe_t *pipe, igt_output_t *output,
 				   igt_plane_t *primary, igt_plane_t *overlay,
@@ -369,6 +381,16 @@ plane_primary_overlay_mutable_zpos(igt_pipe_t *pipe, igt_output_t *output,
 	igt_assert_eq_u64(igt_plane_get_prop(overlay, IGT_PLANE_ZPOS), 1);
 }
 
+/**
+ * SUBTEST: plane-immutable-zpos
+ * Description: Verify the reported zpos property of planes by making sure only
+ *              higher zpos planes cover the lower zpos ones.
+ * Driver requirement: any
+ * Functionality: kms_core, plane
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ */
 static void
 plane_immutable_zpos(igt_display_t *display, igt_pipe_t *pipe,
 		     igt_output_t *output)
@@ -505,6 +527,22 @@ plane_immutable_zpos(igt_display_t *display, igt_pipe_t *pipe,
 	igt_remove_fb(display->drm_fd, &fb_upper);
 }
 
+/**
+ * SUBTEST: plane-%s-legacy
+ * Description: Test for KMS atomic modesetting on %arg[1] and ensure coherency
+ *              between legacy and atomic interfaces.
+ * Driver requirement: any
+ * Functionality: kms_core, plane
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ *
+ * arg[1]:
+ *
+ * @cursor:         Cursor plane
+ * @overlay:        Overlay plane
+ * @primary:        Primary plane
+ */
 static void plane_overlay(igt_pipe_t *pipe, igt_output_t *output, igt_plane_t *plane)
 {
 	drmModeModeInfo *mode = igt_output_get_mode(output);
@@ -579,6 +617,17 @@ static void plane_primary(igt_pipe_t *pipe, igt_plane_t *plane, struct igt_fb *f
 	plane_commit(plane, COMMIT_UNIVERSAL, ATOMIC_RELAX_NONE);
 }
 
+/**
+ * SUBTEST: test-only
+ * Description: Test to ensure that DRM_MODE_ATOMIC_TEST_ONLY really only touches
+ *              the free-standing state objects and nothing else.
+ * Driver requirement: any
+ * Functionality: kms_core
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ */
+
 /* test to ensure that DRM_MODE_ATOMIC_TEST_ONLY really only touches the
  * free-standing state objects and nothing else.
  */
@@ -687,6 +736,20 @@ static void plane_cursor(igt_pipe_t *pipe_obj,
 	plane_commit(cursor, COMMIT_LEGACY, ATOMIC_RELAX_NONE);
 }
 
+/**
+ * SUBTEST: plane-invalid-%s
+ * Description: Test error handling when invalid %arg[1] are passed
+ * Driver requirement: any
+ * Functionality: kms_core, plane
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ *
+ * arg[1]:
+ *
+ * @params:           plane parameters
+ * @params-fence:     plane fence parameters
+ */
 static void plane_invalid_params(igt_pipe_t *pipe,
 				 igt_output_t *output,
 				 igt_plane_t *plane,
@@ -776,6 +839,20 @@ static void plane_invalid_params_fence(igt_pipe_t *pipe,
 	close(timeline);
 }
 
+/**
+ * SUBTEST: crtc-invalid-%s
+ * Description: Test error handling when invalid %arg[1] are passed
+ * Driver requirement: any
+ * Functionality: kms_core
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ *
+ * arg[1]:
+ *
+ * @params:           crtc parameters
+ * @params-fence:     crtc fence parameters
+ */
 static void crtc_invalid_params(igt_pipe_t *pipe,
 				igt_output_t *output,
 				igt_plane_t *plane,
@@ -923,6 +1000,18 @@ static void crtc_invalid_params_fence(igt_pipe_t *pipe,
 	igt_assert(pipe->out_fence_fd != -1);
 }
 
+/**
+ * SUBTEST: atomic-invalid-params
+ * Description: Test abuse the atomic ioctl directly in order to test various
+ *              invalid conditions which the libdrm wrapper won't allow us to
+ *              create.
+ * Driver requirement: any
+ * Functionality: kms_core
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ */
+
 /* Abuse the atomic ioctl directly in order to test various invalid conditions,
  * which the libdrm wrapper won't allow us to create. */
 static void atomic_invalid_params(igt_pipe_t *pipe,
@@ -1064,6 +1153,15 @@ static void atomic_invalid_params(igt_pipe_t *pipe,
 	do_ioctl_err(display->drm_fd, DRM_IOCTL_MODE_ATOMIC, &ioc, EFAULT);
 }
 
+/**
+ * SUBTEST: atomic_plane_damage
+ * Description: Simple test cases to use FB_DAMAGE_CLIPS plane property
+ * Driver requirement: any
+ * Functionality: kms_core, plane
+ * Mega feature: General Display Features
+ * Run type: FULL
+ * Test category: functionality test
+ */
 static void atomic_plane_damage(igt_pipe_t *pipe, igt_plane_t *plane, struct igt_fb *fb)
 {
 	struct drm_mode_rect damage[2];
-- 
2.40.0