test: Add test for checking if page flip changes tiling

Test that a page flip from a tiled buffer to a linear one works
correctly. First, it sets the crtc with the linear buffer andr
generate a reference crc for the pipe. Then, the crtc is set with
the tiled one and page flip to the linear one issued. A new crc is
generated and compared to the rerence one.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>

tests/Makefile.sources

@@ -59,6 +59,7 @@ TESTS_progs_M = \
 	kms_cursor_crc \
 	kms_fbc_crc \
 	kms_flip \
+	kms_flip_tiling
 	kms_pipe_crc_basic \
 	kms_plane \
 	kms_render \

tests/kms_flip_tiling.c

@@ -0,0 +1,146 @@
+/*
+ * Copyright © 2014 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.
+ *
+ * Authors:
+ *   Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "drmtest.h"
+#include "igt_debugfs.h"
+#include "igt_kms.h"
+#include "ioctl_wrappers.h"
+
+typedef struct {
+	int drm_fd;
+	igt_display_t display;
+} data_t;
+
+/*
+ * Test that a page flip from a tiled buffer to a linear one works
+ * correctly. First, it sets the crtc with the linear buffer and generate
+ * a reference crc for the pipe. Then, the crtc is set with the tiled one
+ * and page flip to the linear one issued. A new crc is generated and
+ * compared to the rerence one.
+ */
+
+static void
+fill_linear_fb(struct igt_fb *fb, data_t *data, drmModeModeInfo *mode)
+{
+	cairo_t *cr;
+
+	cr = igt_get_cairo_ctx(data->drm_fd, fb);
+	igt_paint_test_pattern(cr, mode->hdisplay, mode->vdisplay);
+	cairo_destroy(cr);
+}
+
+static void
+test_flip_changes_tiling(data_t *data, igt_output_t *output)
+{
+	struct igt_fb linear, tiled;
+	drmModeModeInfo *mode;
+	igt_plane_t *primary;
+	igt_pipe_crc_t *pipe_crc;
+	igt_crc_t reference_crc, crc;
+	int fb_id, pipe, ret, width;
+
+	pipe = 0;
+	pipe_crc = igt_pipe_crc_new(pipe, INTEL_PIPE_CRC_SOURCE_AUTO);
+	igt_output_set_pipe(output, 0);
+
+	mode = igt_output_get_mode(output);
+	primary = igt_output_get_plane(output, 0);
+
+	/* Allocate a linear buffer. Since a page flip to a buffer with
+	 * different stride doesn't work, choose width so that the stride of
+	 * both buffers is the same. */
+	width = 512;
+	while (width < mode->hdisplay)
+		width *= 2;
+	fb_id = igt_create_fb(data->drm_fd, width, mode->vdisplay,
+			      DRM_FORMAT_XRGB8888, false, &linear);
+
+	/* fill it with a pattern that will look wrong if tiling is wrong */
+	fill_linear_fb(&linear, data, mode);
+
+	/* set the crtc and generate a reference crc */
+	igt_plane_set_fb(primary, &linear);
+	igt_display_commit(&data->display);
+	igt_pipe_crc_collect_crc(pipe_crc, &reference_crc);
+
+	/* allocate a tiled buffer and set the crtc with it */
+	igt_create_color_fb(data->drm_fd, width, mode->vdisplay,
+			    DRM_FORMAT_XRGB8888, true, 0.0, 0.0, 0.0, &tiled);
+	igt_plane_set_fb(primary, &tiled);
+	igt_display_commit(&data->display);
+
+	/* flip to the linear buffer */
+	ret = drmModePageFlip(data->drm_fd, output->config.crtc->crtc_id,
+			      fb_id, 0, NULL);
+	igt_assert(ret == 0);
+
+	igt_wait_for_vblank(data->drm_fd, pipe);
+
+	/* get a crc and compare with the reference */
+	igt_pipe_crc_collect_crc(pipe_crc, &crc);
+	igt_assert(igt_crc_equal(&reference_crc, &crc));
+
+	/* clean up */
+	igt_plane_set_fb(primary, NULL);
+	igt_pipe_crc_free(pipe_crc);
+	igt_output_set_pipe(output, PIPE_ANY);
+	igt_display_commit(&data->display);
+
+	igt_remove_fb(data->drm_fd, &tiled);
+	igt_remove_fb(data->drm_fd, &linear);
+}
+
+static data_t data;
+
+igt_main
+{
+	igt_output_t *output;
+
+	igt_skip_on_simulation();
+
+	igt_fixture {
+		data.drm_fd = drm_open_any();
+
+		igt_set_vt_graphics_mode();
+
+		igt_require_pipe_crc();
+		igt_display_init(&data.display, data.drm_fd);
+	}
+
+	igt_subtest_f("flip-changes-tiling");
+
+	for_each_connected_output(&data.display, output)
+		test_flip_changes_tiling(&data, output);
+
+	igt_fixture {
+		igt_display_fini(&data.display);
+	}
+}