This is a testcase with multiple planes. The idea here is the following

 - draw a uniform frame with blue color
 - grab crc for reference
 - put planes randomly on top with the same blue color
 - punch holes with black color into the primary framebuffer
 - ideally the planes should cover these holes so that the output is the
   identical to reference crc
 - composite all with one ioctl call
 - grab crc and verify that the reference crc is equal
 - repeat this for dozen iterations to maximize coverage

v3: Cleanup by removing separate plane array
    For atomic, pass DRM_MODE_PAGE_FLIP_EVENT
    Grab crc by using igt_pipe_crc_get_crc instead of igt_pipe_crc_collect_crc
    Rename nplanes variable to max_planes
    To optimize test execution, run iterations after the modeset

v2: Keep a logfile on random number seeds per subtest that are not skipped
    due to unmet test requirements

Signed-off-by: Mika Kahola <mika.kah...@intel.com>
---
 tests/Makefile.sources     |   1 +
 tests/kms_plane_multiple.c | 423 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 424 insertions(+)
 create mode 100644 tests/kms_plane_multiple.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 6d081c3..ffd59c1 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -105,6 +105,7 @@ TESTS_progs_M = \
        kms_pipe_color \
        kms_pipe_crc_basic \
        kms_plane \
+       kms_plane_multiple \
        kms_properties \
        kms_psr_sink_crc \
        kms_render \
diff --git a/tests/kms_plane_multiple.c b/tests/kms_plane_multiple.c
new file mode 100644
index 0000000..0cb7552
--- /dev/null
+++ b/tests/kms_plane_multiple.c
@@ -0,0 +1,423 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "igt.h"
+#include "drmtest.h"
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+IGT_TEST_DESCRIPTION("Test atomic mode setting with multiple planes ");
+
+#define SIZE 128
+
+typedef struct {
+       float red;
+       float green;
+       float blue;
+} color_t;
+
+typedef struct {
+       int drm_fd;
+       igt_display_t display;
+       igt_pipe_crc_t *pipe_crc;
+       igt_plane_t *plane[IGT_MAX_PLANES];
+       struct igt_fb fb[IGT_MAX_PLANES];
+} data_t;
+
+typedef struct {
+       data_t *data;
+       igt_crc_t reference_crc;
+} test_position_t;
+
+/* Command line parameters. */
+struct {
+       bool user_seed;
+       int seed;
+       bool user_logfile;
+       char logfile[SIZE];
+} opt = {
+       .user_seed = false,
+       .seed = 1,
+       .user_logfile = false,
+       .logfile = "kms_plane_multiple.log",
+};
+
+
+static int logwrite(const char *testname)
+{
+       time_t curr_time;
+       FILE *fid;
+       char *time_str;
+
+       fid = fopen(opt.logfile, "a");
+
+       if (fid == NULL) {
+               igt_debug("Could not open file %s\n", opt.logfile);
+               return -1;
+       }
+
+       curr_time = time(NULL);
+
+       time_str = ctime(&curr_time);
+       time_str[strlen(time_str)-1] = '\0';
+
+       fprintf(fid, "%s: kms_plane_multiple --run-subtest %s --seed %d\n",
+               time_str, testname, opt.seed);
+
+       fclose(fid);
+
+       return 0;
+}
+
+/*
+ * Common code across all tests, acting on data_t
+ */
+static void test_init(data_t *data, enum pipe pipe)
+{
+       data->pipe_crc = igt_pipe_crc_new(pipe, INTEL_PIPE_CRC_SOURCE_AUTO);
+}
+
+static void test_fini(data_t *data, igt_output_t *output, int max_planes)
+{
+       igt_plane_set_fb(data->plane[IGT_PLANE_PRIMARY], NULL);
+
+       for (int i = IGT_PLANE_2; i <= max_planes; i++)
+               igt_plane_set_fb(data->plane[i], NULL);
+
+       /* reset the constraint on the pipe */
+       igt_output_set_pipe(output, PIPE_ANY);
+
+       igt_pipe_crc_free(data->pipe_crc);
+}
+
+static bool test_is_atomic(const char *testname)
+{
+       if (strncmp(testname, "atomic", 6) == 0)
+               return true;
+
+       return false;
+}
+
+static void
+test_grab_crc(data_t *data, igt_output_t *output, enum pipe pipe,
+             color_t *color, uint64_t tiling, igt_crc_t *crc /* out */)
+{
+       struct igt_fb fb;
+       drmModeModeInfo *mode;
+       igt_plane_t *primary;
+       int n;
+       bool test_atomic = test_is_atomic(igt_subtest_name());
+
+       igt_output_set_pipe(output, pipe);
+
+       primary = igt_output_get_plane(output, IGT_PLANE_PRIMARY);
+
+       mode = igt_output_get_mode(output);
+
+       igt_create_color_fb(data->drm_fd, mode->hdisplay, mode->vdisplay,
+                           DRM_FORMAT_XRGB8888,
+                           LOCAL_DRM_FORMAT_MOD_NONE,
+                           color->red, color->green, color->blue,
+                           &fb);
+
+       igt_plane_set_fb(primary, &fb);
+
+       igt_display_commit2(&data->display,
+                           test_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);
+
+       igt_pipe_crc_start(data->pipe_crc);
+       n = igt_pipe_crc_get_crcs(data->pipe_crc, 1, &crc);
+       igt_assert_eq(n, 1);
+       igt_pipe_crc_stop(data->pipe_crc);
+
+       igt_plane_set_fb(primary, NULL);
+
+       igt_display_commit2(&data->display,
+                           test_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);
+
+       igt_remove_fb(data->drm_fd, &fb);
+}
+
+/*
+ * Multiple plane position test.
+ *   - We start by grabbing a reference CRC of a full blue fb being scanned
+ *     out on the primary plane
+ *   - Then we scannout number of planes:
+ *      * the primary plane uses a blue fb with a black rectangle hole
+ *      * planes, on top of the primary plane, with a blue fb that is set-up
+ *        to cover the black rectangles of the primary plane fb
+ *     The resulting CRC should be identical to the reference CRC
+ */
+
+static void
+create_fb_for_mode_position(data_t *data, drmModeModeInfo *mode,
+                           color_t *color, int *rect_x, int *rect_y,
+                           int rect_w, int rect_h, uint64_t tiling,
+                           int max_planes)
+{
+       unsigned int fb_id;
+       cairo_t *cr;
+
+       fb_id = igt_create_fb(data->drm_fd,
+                             mode->hdisplay, mode->vdisplay,
+                             DRM_FORMAT_XRGB8888,
+                             tiling,
+                             &data->fb[IGT_PLANE_PRIMARY]);
+       igt_assert(fb_id);
+
+       cr = igt_get_cairo_ctx(data->drm_fd, &data->fb[IGT_PLANE_PRIMARY]);
+       igt_paint_color(cr, rect_x[0], rect_y[0],
+                       mode->hdisplay, mode->vdisplay,
+                       color->red, color->green, color->blue);
+
+       for (int i = IGT_PLANE_2; i <= max_planes; i++)
+               igt_paint_color(cr, rect_x[i], rect_y[i],
+                               rect_w, rect_h, 0.0, 0.0, 0.0);
+
+       igt_assert(cairo_status(cr) == 0);
+       cairo_destroy(cr);
+}
+
+
+static void
+test_planes(data_t *data, enum pipe pipe, color_t *color,
+           uint64_t tiling, int max_planes, igt_output_t *output)
+{
+       drmModeModeInfo *mode;
+       int x[IGT_MAX_PLANES];
+       int y[IGT_MAX_PLANES];
+       int i;
+
+       igt_output_set_pipe(output, pipe);
+
+       mode = igt_output_get_mode(output);
+
+       /* sprite planes with random positions */
+       x[IGT_PLANE_PRIMARY] = 0;
+       y[IGT_PLANE_PRIMARY] = 0;
+       for (i = IGT_PLANE_2; i <= max_planes; i++) {
+               x[i] = rand() % (mode->hdisplay - SIZE);
+               y[i] = rand() % (mode->vdisplay - SIZE);
+
+               data->plane[i] = igt_output_get_plane(output, i);
+
+               igt_create_color_fb(data->drm_fd,
+                                   SIZE, SIZE, /* width, height */
+                                   data->plane[i]->is_cursor ? 
DRM_FORMAT_ARGB8888 : DRM_FORMAT_XRGB8888,
+                                   tiling,
+                                   color->red, color->green, color->blue,
+                                   &data->fb[i]);
+
+               igt_plane_set_position(data->plane[i], x[i], y[i]);
+               igt_plane_set_fb(data->plane[i], &data->fb[i]);
+       }
+
+       /* primary plane */
+       data->plane[IGT_PLANE_PRIMARY] = igt_output_get_plane(output, 
IGT_PLANE_PRIMARY);
+       create_fb_for_mode_position(data, mode, color, x, y,
+                                   SIZE, SIZE, tiling, max_planes);
+       igt_plane_set_fb(data->plane[IGT_PLANE_PRIMARY], 
&data->fb[IGT_PLANE_PRIMARY]);
+}
+
+static void
+test_plane_position_with_output(data_t *data, enum pipe pipe, igt_output_t 
*output,
+                               int max_planes, uint64_t tiling)
+{
+       test_position_t test = { .data = data };
+       igt_crc_t *crc = NULL;
+       color_t blue  = { 0.0f, 0.0f, 1.0f };
+       int n;
+       bool test_atomic = test_is_atomic(igt_subtest_name());
+       int iterations = 12;
+
+       if (test_atomic)
+               igt_require(data->display.is_atomic);
+
+       igt_info("running test for dozen iterations\n");
+
+       for (int i = 0; i < iterations; i++) {
+               igt_info("%d/%d: Testing connector %s using pipe %s with %d 
planes\n",
+                        i+1, iterations, igt_output_name(output),
+                        kmstest_pipe_name(pipe), max_planes);
+
+               test_init(data, pipe);
+
+               test_grab_crc(data, output, pipe, &blue, tiling,
+                             &test.reference_crc);
+
+               test_planes(data, pipe, &blue, tiling, max_planes, output);
+
+               if (test_atomic) {
+                       igt_display_commit_atomic(&data->display,
+                                                 DRM_MODE_PAGE_FLIP_EVENT,
+                                                 &data->display);
+               } else
+                       igt_display_commit2(&data->display, COMMIT_LEGACY);
+
+               igt_pipe_crc_start(data->pipe_crc);
+               n = igt_pipe_crc_get_crcs(data->pipe_crc, 1, &crc);
+               igt_assert_eq(n, 1);
+               igt_pipe_crc_stop(data->pipe_crc);
+
+               igt_assert_crc_equal(&test.reference_crc, crc);
+
+               test_fini(data, output, max_planes);
+       }
+}
+
+static void
+test_plane_position(data_t *data, enum pipe pipe, int max_planes,
+                   uint64_t tiling)
+{
+       igt_output_t *output;
+       int connected_outs;
+
+       igt_skip_on(pipe >= data->display.n_pipes);
+       igt_skip_on(max_planes >= data->display.pipes[pipe].n_planes);
+
+       if (!opt.user_seed)
+               opt.seed = time(NULL);
+
+       srand(opt.seed);
+       logwrite(igt_subtest_name());
+
+       connected_outs = 0;
+       for_each_connected_output(&data->display, output) {
+               test_plane_position_with_output(data, pipe, output,
+                                               max_planes, tiling);
+               connected_outs++;
+       }
+
+       igt_skip_on(connected_outs == 0);
+
+}
+
+static void
+run_tests_for_pipe_plane(data_t *data, enum pipe pipe, int max_planes)
+{
+       igt_subtest_f("legacy-pipe-%s-tiling-none-planes-%d",
+                     kmstest_pipe_name(pipe), max_planes)
+               test_plane_position(data, pipe, max_planes, 
LOCAL_DRM_FORMAT_MOD_NONE);
+
+       igt_subtest_f("atomic-pipe-%s-tiling-none-planes-%d",
+                     kmstest_pipe_name(pipe), max_planes)
+               test_plane_position(data, pipe, max_planes, 
LOCAL_I915_FORMAT_MOD_X_TILED);
+
+       igt_subtest_f("legacy-pipe-%s-tiling-x-planes-%d",
+                     kmstest_pipe_name(pipe), max_planes)
+               test_plane_position(data, pipe, max_planes, 
LOCAL_I915_FORMAT_MOD_X_TILED);
+
+       igt_subtest_f("atomic-pipe-%s-tiling-x-planes-%d",
+                     kmstest_pipe_name(pipe), max_planes)
+               test_plane_position(data, pipe, max_planes, 
LOCAL_I915_FORMAT_MOD_X_TILED);
+
+       igt_subtest_f("legacy-pipe-%s-tiling-y-planes-%d",
+                     kmstest_pipe_name(pipe), max_planes)
+               test_plane_position(data, pipe, max_planes, 
LOCAL_I915_FORMAT_MOD_Y_TILED);
+
+       igt_subtest_f("atomic-pipe-%s-tiling-y-planes-%d",
+                     kmstest_pipe_name(pipe), max_planes)
+               test_plane_position(data, pipe, max_planes, 
LOCAL_I915_FORMAT_MOD_Y_TILED);
+
+       igt_subtest_f("legacy-pipe-%s-tiling-yf-planes-%d",
+                     kmstest_pipe_name(pipe), max_planes)
+               test_plane_position(data, pipe, max_planes, 
LOCAL_I915_FORMAT_MOD_Yf_TILED);
+
+       igt_subtest_f("atomic-pipe-%s-tiling-yf-planes-%d",
+                     kmstest_pipe_name(pipe), max_planes)
+               test_plane_position(data, pipe, max_planes, 
LOCAL_I915_FORMAT_MOD_Yf_TILED);
+}
+
+static void
+run_tests_for_pipe(data_t *data, enum pipe pipe)
+{
+       for (int planes = 1; planes < IGT_MAX_PLANES; planes++)
+               run_tests_for_pipe_plane(data, pipe, planes);
+}
+
+static data_t data;
+
+static int opt_handler(int option, int option_index, void *input)
+{
+       switch (option) {
+       case 's':
+               opt.user_seed = true;
+               opt.seed = strtol(optarg, NULL, 0);
+               break;
+       case 'l':
+               opt.user_logfile = true;
+               strcpy(opt.logfile, optarg);
+               break;
+       default:
+               igt_assert(false);
+       }
+
+       return 0;
+}
+
+const char *help_str =
+       "  --seed       Seed for random number generator\n"
+       "  --logfile    Logfile to store seeds for random number generator, 
default 'kms_plane_multiple.log'\n";
+
+int main(int argc, char *argv[])
+{
+       time_t t = time(NULL);
+       struct tm tm = *localtime(&t);
+
+       struct option long_options[] = {
+               { "seed",    required_argument, NULL, 's'},
+               { "logfile", required_argument, NULL, 'l'},
+               { 0, 0, 0, 0 }
+       };
+
+       igt_subtest_init_parse_opts(&argc, argv, "", long_options, help_str,
+                                   opt_handler, NULL);
+
+       if (!opt.user_logfile)
+               sprintf(opt.logfile, "kms_plane_multiple-%4d-%2d-%2d.log",
+                       tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
+
+       igt_skip_on_simulation();
+
+       igt_fixture {
+               data.drm_fd = drm_open_driver_master(DRIVER_INTEL);
+
+               kmstest_set_vt_graphics_mode();
+
+               igt_require_pipe_crc();
+               igt_display_init(&data.display, data.drm_fd);
+       }
+
+       for (int pipe = 0; pipe < I915_MAX_PIPES; pipe++)
+               run_tests_for_pipe(&data, pipe);
+
+       igt_fixture {
+               igt_display_fini(&data.display);
+       }
+
+       igt_exit();
+}
-- 
2.7.4

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