[igt-dev] [PATCH i-g-t v1] igt/tests: kms_atomic_transition improvements.

[Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>]

Fixes:
   - With some upcoming changes i915 might not allow
     all sprite planes enabled, depending on available
     bandwidth limitation. Thus the test need to decrement
     amount of planes and try again, instead of panicking.
   - Removed unneeded overlays variable, changed the parms
     initialization cycle that it initializes also iter_mask
     and parms[i].mask at the same time, fullfiling the same
     requirements(i.e always use primary, cursor and one sprite
     plane, for the rest parms[i].mask is randomized).
   - While fixing used amount of planes, discovered that if
     wm_setup_plane is called with 0 planes(might happen during
     main testing cycle, as parms[i].mask can be 0 due to randomization)
     then subsequent wait_transition fails in assertion on fd_completed.
     So added return value to wm_setup_plane, which would allow to
     determine, if we need to skip this step.

Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
---
 tests/kms_atomic_transition.c | 85 +++++++++++++++++++----------------
 1 file changed, 47 insertions(+), 38 deletions(-)

diff --git a/tests/kms_atomic_transition.c b/tests/kms_atomic_transition.c
index 18f73317..a75e98b5 100644
--- a/tests/kms_atomic_transition.c
+++ b/tests/kms_atomic_transition.c
@@ -118,11 +118,12 @@ static void configure_fencing(igt_plane_t *plane)
 	igt_assert_eq(ret, 0);
 }
 
-static void
+static int
 wm_setup_plane(igt_display_t *display, enum pipe pipe,
 	       uint32_t mask, struct plane_parms *parms, bool fencing)
 {
 	igt_plane_t *plane;
+	int planes_set_up = 0;
 
 	/*
 	* Make sure these buffers are suited for display use
@@ -133,8 +134,10 @@ wm_setup_plane(igt_display_t *display, enum pipe pipe,
 		int i = plane->index;
 
 		if (!mask || !(parms[i].mask & mask)) {
-			if (plane->values[IGT_PLANE_FB_ID])
+			if (plane->values[IGT_PLANE_FB_ID]) {
 				igt_plane_set_fb(plane, NULL);
+				planes_set_up++;
+			}
 			continue;
 		}
 
@@ -144,7 +147,10 @@ wm_setup_plane(igt_display_t *display, enum pipe pipe,
 		igt_plane_set_fb(plane, parms[i].fb);
 		igt_fb_set_size(parms[i].fb, plane, parms[i].width, parms[i].height);
 		igt_plane_set_size(plane, parms[i].width, parms[i].height);
+
+		planes_set_up++;
 	}
+	return planes_set_up;
 }
 
 static void ev_page_flip(int fd, unsigned seq, unsigned tv_sec, unsigned tv_usec, void *user_data)
@@ -206,9 +212,10 @@ static void setup_parms(igt_display_t *display, enum pipe pipe,
 	unsigned sprite_width, sprite_height, prev_w, prev_h;
 	bool max_sprite_width, max_sprite_height, alpha = true;
 	uint32_t n_planes = display->pipes[pipe].n_planes;
-	uint32_t n_overlays = 0, overlays[n_planes];
+	uint32_t n_overlays;
 	igt_plane_t *plane;
-	uint32_t iter_mask = 3;
+	uint32_t iter_mask;
+	int retries = n_planes - 1;
 
 	do_or_die(drmGetCap(display->drm_fd, DRM_CAP_CURSOR_WIDTH, &cursor_width));
 	if (cursor_width >= mode->hdisplay)
@@ -217,6 +224,9 @@ static void setup_parms(igt_display_t *display, enum pipe pipe,
 	do_or_die(drmGetCap(display->drm_fd, DRM_CAP_CURSOR_HEIGHT, &cursor_height));
 	if (cursor_height >= mode->vdisplay)
 		cursor_height = mode->vdisplay;
+retry:
+	n_overlays = 0;
+	iter_mask = 0;
 
 	for_each_plane_on_pipe(display, pipe, plane) {
 		int i = plane->index;
@@ -225,36 +235,21 @@ static void setup_parms(igt_display_t *display, enum pipe pipe,
 			parms[i].fb = primary_fb;
 			parms[i].width = mode->hdisplay;
 			parms[i].height = mode->vdisplay;
-			parms[i].mask = 1 << 0;
 		} else if (plane->type == DRM_PLANE_TYPE_CURSOR) {
 			parms[i].fb = argb_fb;
 			parms[i].width = cursor_width;
 			parms[i].height = cursor_height;
-			parms[i].mask = 1 << 1;
 		} else {
 			parms[i].fb = sprite_fb;
-			parms[i].mask = 1 << 2;
-
-			iter_mask |= 1 << 2;
-
-			overlays[n_overlays++] = i;
+			n_overlays++;
 		}
-	}
-
-	if (n_overlays >= 2) {
-		uint32_t i;
-
-		/*
-		 * Create 2 groups for overlays, make sure 1 plane is put
-		 * in each then spread the rest out.
-		 */
-		iter_mask |= 1 << 3;
-		parms[overlays[n_overlays - 1]].mask = 1 << 3;
-
-		for (i = 1; i < n_overlays - 1; i++) {
-			int val = hars_petruska_f54_1_random_unsafe_max(2);
-
-			parms[overlays[i]].mask = 1 << (2 + val);
+		iter_mask |= 1 << i;
+		if (i <= 2) {
+			/* always leave one plane as in original algorithm */
+			parms[i].mask = 1 << i;
+		}
+		else {
+			parms[i].mask = hars_petruska_f54_1_random_unsafe_max(2) << i;
 		}
 	}
 
@@ -272,7 +267,6 @@ static void setup_parms(igt_display_t *display, enum pipe pipe,
 	 * Pre gen9 not all sizes are supported, find the biggest possible
 	 * size that can be enabled on all sprite planes.
 	 */
-retry:
 	prev_w = sprite_width = cursor_width;
 	prev_h = sprite_height = cursor_height;
 
@@ -292,12 +286,22 @@ retry:
 		if (is_atomic_check_plane_size_errno(ret)) {
 			if (cursor_width == sprite_width &&
 			    cursor_height == sprite_height) {
-				igt_assert_f(alpha,
-					      "Cannot configure the test with all sprite planes enabled\n");
-
-				/* retry once with XRGB format. */
-				alpha = false;
-				goto retry;
+				if (--retries >= 0) {
+					/* retry once with XRGB format. */
+					if (alpha) {
+						alpha = false;
+					}
+					else if (display->pipes[pipe].n_planes > 0) {
+						display->pipes[pipe].n_planes--;
+						igt_info("Reduced available planes to %d\n",
+							    display->pipes[pipe].n_planes);
+					}
+					n_planes = display->pipes[pipe].n_planes;
+					igt_assert_f(n_planes > 0, "No planes left to proceed with!");
+					goto retry;
+				}
+				igt_assert_f(retries > 0,
+				      "Cannot configure the test with all sprite planes enabled\n");
 			}
 
 			sprite_width = prev_w;
@@ -544,7 +548,8 @@ run_transition_test(igt_display_t *display, enum pipe pipe, igt_output_t *output
 
 		igt_output_set_pipe(output, pipe);
 
-		wm_setup_plane(display, pipe, i, parms, fencing);
+		if (!wm_setup_plane(display, pipe, i, parms, fencing))
+			continue;
 
 		atomic_commit(display, pipe, flags, (void *)(unsigned long)i, fencing);
 		wait_for_transition(display, pipe, nonblocking, fencing);
@@ -552,7 +557,8 @@ run_transition_test(igt_display_t *display, enum pipe pipe, igt_output_t *output
 		if (type == TRANSITION_MODESET_DISABLE) {
 			igt_output_set_pipe(output, PIPE_NONE);
 
-			wm_setup_plane(display, pipe, 0, parms, fencing);
+			if (!wm_setup_plane(display, pipe, 0, parms, fencing))
+				continue;
 
 			atomic_commit(display, pipe, flags, (void *) 0UL, fencing);
 			wait_for_transition(display, pipe, nonblocking, fencing);
@@ -568,7 +574,8 @@ run_transition_test(igt_display_t *display, enum pipe pipe, igt_output_t *output
 				    n_enable_planes < pipe_obj->n_planes)
 					continue;
 
-				wm_setup_plane(display, pipe, j, parms, fencing);
+				if (!wm_setup_plane(display, pipe, j, parms, fencing))
+					continue;
 
 				if (type >= TRANSITION_MODESET)
 					igt_output_override_mode(output, &override_mode);
@@ -576,7 +583,9 @@ run_transition_test(igt_display_t *display, enum pipe pipe, igt_output_t *output
 				atomic_commit(display, pipe, flags, (void *)(unsigned long) j, fencing);
 				wait_for_transition(display, pipe, nonblocking, fencing);
 
-				wm_setup_plane(display, pipe, i, parms, fencing);
+				if (!wm_setup_plane(display, pipe, i, parms, fencing))
+					continue;
+
 				if (type >= TRANSITION_MODESET)
 					igt_output_override_mode(output, NULL);
 
-- 
2.17.1

_______________________________________________
igt-dev mailing list
igt-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/igt-dev