[PATCH i-g-t] test/kms_plane_lowres: Fix display_commit_mode() so it returns the crc

[Maarten Lankhorst <maarten.lankhorst@linux.intel.com>]

From: Arkadiusz Hiler <arkadiusz.hiler@intel.com>

Compiler complained on crc_lowres and crc_hires2 being uninitialized
and indeed, display_commit_mode() seems to have intention of retruning
the value through the parameter that is only a single pointer.

This couses only the local copy of the pointer, the one inside
display_commit_mode(), to be overwritten.

Let's fix that!

Also add missing hires crc comparison (M. Kahola).

v2: make display_commit_mode return just the last CRC
v3: Don't do memory allocations, it's hard. (Maarten)
v4: Use igt_pipe_crc_collect_crc() instead, cleans up crc handling a lot.

Cc: Mika Kahola <mika.kahola@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 tests/kms_plane_lowres.c | 36 ++++++++++++------------------------
 1 file changed, 12 insertions(+), 24 deletions(-)

diff --git a/tests/kms_plane_lowres.c b/tests/kms_plane_lowres.c
index 85d3145de4b6..c224a1bf7026 100644
--- a/tests/kms_plane_lowres.c
+++ b/tests/kms_plane_lowres.c
@@ -125,17 +125,12 @@ test_fini(data_t *data, igt_output_t *output, enum pipe pipe)
 	data->fb = NULL;
 }
 
-static int
+static void
 display_commit_mode(igt_display_t *display, igt_pipe_crc_t *pipe_crc,
-		    enum pipe pipe, int flags, igt_crc_t *crc)
+		    enum pipe pipe, int flags, igt_crc_t *out_crc)
 {
 	char buf[256];
-	struct drm_event *e = (void *)buf;
-	unsigned int vblank_start, vblank_stop;
-	int n, ret;
-
-	vblank_start = kmstest_get_vblank(display->drm_fd, pipe,
-					  DRM_VBLANK_NEXTONMISS);
+	int ret;
 
 	ret = igt_display_try_commit_atomic(display, flags, NULL);
 	igt_skip_on(ret != 0);
@@ -144,14 +139,7 @@ display_commit_mode(igt_display_t *display, igt_pipe_crc_t *pipe_crc,
 	ret = read(display->drm_fd, buf, sizeof(buf));
 	igt_assert(ret >= 0);
 
-	vblank_stop = kmstest_get_vblank(display->drm_fd, pipe, 0);
-	igt_assert_eq(e->type, DRM_EVENT_FLIP_COMPLETE);
-	igt_reset_timeout();
-
-	n = igt_pipe_crc_get_crcs(pipe_crc, vblank_stop - vblank_start, &crc);
-	igt_assert_eq(n, vblank_stop - vblank_start);
-
-	return n;
+	igt_pipe_crc_collect_crc(pipe_crc, out_crc);
 }
 
 static void
@@ -218,11 +206,11 @@ static void
 test_plane_position_with_output(data_t *data, enum pipe pipe,
 				igt_output_t *output, uint64_t modifier)
 {
-	igt_crc_t *crc_hires1, *crc_hires2;
-	igt_crc_t *crc_lowres;
+	igt_crc_t crc_hires1, crc_hires2;
+	igt_crc_t crc_lowres;
 	drmModeModeInfo mode_lowres;
 	drmModeModeInfo *mode1, *mode2, *mode3;
-	int ret, n;
+	int ret;
 	int flags = DRM_MODE_PAGE_FLIP_EVENT | DRM_MODE_ATOMIC_ALLOW_MODESET;
 	igt_pipe_crc_t *pipe_crc;
 
@@ -237,10 +225,8 @@ test_plane_position_with_output(data_t *data, enum pipe pipe,
 	igt_skip_on(ret != 0);
 
 	pipe_crc = igt_pipe_crc_new(data->drm_fd, pipe, INTEL_PIPE_CRC_SOURCE_AUTO);
-	igt_pipe_crc_start(pipe_crc);
 
-	n = igt_pipe_crc_get_crcs(pipe_crc, 1, &crc_hires1);
-	igt_assert_eq(1, n);
+	igt_pipe_crc_collect_crc(pipe_crc, &crc_hires1);
 
 	igt_assert_plane_visible(data->drm_fd, pipe, true);
 
@@ -252,7 +238,7 @@ test_plane_position_with_output(data_t *data, enum pipe pipe,
 
 	check_mode(&mode_lowres, mode2);
 
-	display_commit_mode(&data->display, pipe_crc, pipe, flags, crc_lowres);
+	display_commit_mode(&data->display, pipe_crc, pipe, flags, &crc_lowres);
 
 	igt_assert_plane_visible(data->drm_fd, pipe, false);
 
@@ -264,10 +250,12 @@ test_plane_position_with_output(data_t *data, enum pipe pipe,
 
 	check_mode(mode1, mode3);
 
-	display_commit_mode(&data->display, pipe_crc, pipe, flags, crc_hires2);
+	display_commit_mode(&data->display, pipe_crc, pipe, flags, &crc_hires2);
 
 	igt_assert_plane_visible(data->drm_fd, pipe, true);
 
+	igt_assert_crc_equal(&crc_hires1, &crc_hires2);
+
 	igt_pipe_crc_stop(pipe_crc);
 	igt_pipe_crc_free(pipe_crc);
 
-- 
2.15.1

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