tests: add kms_fbcon_fbt

This test should test the interactions between fbcon and the
frontbuffer tracking infrastructure.

Right now the PSR test fails, but as soon as we merge the following
kernel patches, the test wills tart passing:
 - drm/i915: PSR: Flush means invalidate + flush
 - drm/i915: fbdev restore mode needs to invalidate frontbuffer
 - drm/i915: fbdev_set_par reliably invalidating frontbuffer

I didn't want to make this a subtest of kms_frontbuffer_tracking just
because when I wrote it, I really didn't have in mind the fact that
someone might just close the DRM fd in the middle of a subtest.

After this commit we'll have a little bit of duplicated code among
tests. I'll clean this up later.

v2:
  - Refactor the code a little bit.
  - Add the suspend subtests.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

1 files changed, 291 insertions, 0 deletions

diff --git a/tests/kms_fbcon_fbt.c b/tests/kms_fbcon_fbt.c
new file mode 100644
index 00000000..f0750145
--- /dev/null
+++ b/tests/kms_fbcon_fbt.c
@@ -0,0 +1,291 @@
+/*
+ * Copyright © 2015 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: Paulo Zanoni <paulo.r.zanoni@intel.com>
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "drmtest.h"
+#include "igt_aux.h"
+#include "igt_debugfs.h"
+#include "igt_draw.h"
+#include "igt_kms.h"
+
+IGT_TEST_DESCRIPTION("Test the relationship between fbcon and the frontbuffer "
+		     "tracking infrastructure.");
+
+#define MAX_CONNECTORS 32
+
+static bool do_wait_user = false;
+
+struct drm_info {
+	int fd;
+	drmModeResPtr res;
+	drmModeConnectorPtr connectors[MAX_CONNECTORS];
+};
+
+static void wait_user(const char *msg)
+{
+	if (!do_wait_user)
+		return;
+
+	igt_info("%s Press enter...\n", msg);
+	while (getchar() != '\n')
+		;
+}
+
+static void setup_drm(struct drm_info *drm)
+{
+	int i;
+
+	drm->fd = drm_open_any_master();
+
+	drm->res = drmModeGetResources(drm->fd);
+	igt_assert(drm->res->count_connectors <= MAX_CONNECTORS);
+
+	for (i = 0; i < drm->res->count_connectors; i++)
+		drm->connectors[i] = drmModeGetConnector(drm->fd,
+						drm->res->connectors[i]);
+
+	kmstest_set_vt_graphics_mode();
+}
+
+static void teardown_drm(struct drm_info *drm)
+{
+	int i;
+
+	kmstest_restore_vt_mode();
+
+	for (i = 0; i < drm->res->count_connectors; i++)
+		drmModeFreeConnector(drm->connectors[i]);
+
+	drmModeFreeResources(drm->res);
+	igt_assert(close(drm->fd) == 0);
+}
+
+static void debugfs_read(const char *filename, char *buf, int buf_size)
+{
+	FILE *file;
+	size_t n_read;
+
+	file = igt_debugfs_fopen(filename, "r");
+	igt_assert(file);
+
+	n_read = fread(buf, 1, buf_size - 1, file);
+	igt_assert(n_read > 0);
+	igt_assert(feof(file));
+
+	buf[n_read] = '\0';
+
+	igt_assert(fclose(file) == 0);
+}
+
+static bool fbc_supported_on_chipset(void)
+{
+	char buf[128];
+
+	debugfs_read("i915_fbc_status", buf, ARRAY_SIZE(buf));
+	return !strstr(buf, "FBC unsupported on this chipset\n");
+}
+
+static bool connector_can_fbc(drmModeConnectorPtr connector)
+{
+	return true;
+}
+
+static bool fbc_is_enabled(void)
+{
+	char buf[128];
+
+	debugfs_read("i915_fbc_status", buf, ARRAY_SIZE(buf));
+	return strstr(buf, "FBC enabled\n");
+}
+
+static bool fbc_wait_until_enabled(void)
+{
+	return igt_wait(fbc_is_enabled(), 5000, 1);
+}
+
+typedef bool (*connector_possible_fn)(drmModeConnectorPtr connector);
+
+static void set_mode_for_one_screen(struct drm_info *drm, struct igt_fb *fb,
+				    connector_possible_fn connector_possible)
+{
+	int i, rc;
+	uint32_t connector_id = 0, crtc_id;
+	drmModeModeInfoPtr mode;
+	uint32_t buffer_id;
+	drmModeConnectorPtr c = NULL;
+
+	for (i = 0; i < drm->res->count_connectors; i++) {
+		c = drm->connectors[i];
+
+		if (c->connection == DRM_MODE_CONNECTED && c->count_modes &&
+		    connector_possible(c)) {
+			connector_id = c->connector_id;
+			mode = &c->modes[0];
+			break;
+		}
+	}
+	igt_require_f(connector_id, "No connector available\n");
+
+	crtc_id = drm->res->crtcs[0];
+
+	buffer_id = igt_create_fb(drm->fd, mode->hdisplay, mode->vdisplay,
+				  DRM_FORMAT_XRGB8888,
+				  LOCAL_I915_FORMAT_MOD_X_TILED, fb);
+	igt_draw_fill_fb(drm->fd, fb, 0xFF);
+
+	igt_info("Setting %dx%d mode for %s connector\n",
+		 mode->hdisplay, mode->vdisplay,
+		 kmstest_connector_type_str(c->connector_type));
+
+	rc = drmModeSetCrtc(drm->fd, crtc_id, buffer_id, 0, 0, &connector_id, 1,
+			    mode);
+	igt_assert_eq(rc, 0);
+}
+
+static bool psr_supported_on_chipset(void)
+{
+	char buf[256];
+
+	debugfs_read("i915_edp_psr_status", buf, ARRAY_SIZE(buf));
+	return strstr(buf, "Sink_Support: yes\n");
+}
+
+static bool connector_can_psr(drmModeConnectorPtr connector)
+{
+	return (connector->connector_type == DRM_MODE_CONNECTOR_eDP);
+}
+
+static bool psr_is_enabled(void)
+{
+	char buf[256];
+
+	debugfs_read("i915_edp_psr_status", buf, ARRAY_SIZE(buf));
+	return strstr(buf, "\nActive: yes\n");
+}
+
+static bool psr_wait_until_enabled(void)
+{
+	return igt_wait(psr_is_enabled(), 5000, 1);
+}
+
+struct feature {
+	bool (*supported_on_chipset)(void);
+	bool (*wait_until_enabled)(void);
+	bool (*connector_possible_fn)(drmModeConnectorPtr connector);
+	const char *param_name;
+} fbc = {
+	.supported_on_chipset = fbc_supported_on_chipset,
+	.wait_until_enabled = fbc_wait_until_enabled,
+	.connector_possible_fn = connector_can_fbc,
+	.param_name = "enable_fbc",
+}, psr = {
+	.supported_on_chipset = psr_supported_on_chipset,
+	.wait_until_enabled = psr_wait_until_enabled,
+	.connector_possible_fn = connector_can_psr,
+	.param_name = "enable_psr",
+};
+
+static void disable_features(void)
+{
+	igt_set_module_param_int(fbc.param_name, 0);
+	igt_set_module_param_int(psr.param_name, 0);
+}
+
+static void subtest(struct feature *feature, bool suspend)
+{
+	struct drm_info drm;
+	struct igt_fb fb;
+
+	igt_require(feature->supported_on_chipset());
+
+	disable_features();
+	igt_set_module_param_int(feature->param_name, 1);
+
+	setup_drm(&drm);
+
+	kmstest_unset_all_crtcs(drm.fd, drm.res);
+	wait_user("Modes unset.");
+	igt_assert(!feature->wait_until_enabled());
+
+	set_mode_for_one_screen(&drm, &fb, feature->connector_possible_fn);
+	wait_user("Screen set.");
+	igt_assert(feature->wait_until_enabled());
+
+	if (suspend) {
+		igt_system_suspend_autoresume();
+		sleep(5);
+		igt_assert(feature->wait_until_enabled());
+	}
+
+	igt_remove_fb(drm.fd, &fb);
+	teardown_drm(&drm);
+
+	/* Wait for fbcon to restore itself. */
+	sleep(3);
+
+	wait_user("Back to fbcon.");
+	igt_assert(!feature->wait_until_enabled());
+
+	if (suspend) {
+		igt_system_suspend_autoresume();
+		sleep(5);
+		igt_assert(!feature->wait_until_enabled());
+	}
+}
+
+static void setup_environment(void)
+{
+	int drm_fd;
+
+	drm_fd = drm_open_any_master();
+	igt_require(drm_fd >= 0);
+	igt_assert(close(drm_fd) == 0);
+}
+
+static void teardown_environment(void)
+{
+}
+
+igt_main
+{
+	igt_fixture
+		setup_environment();
+
+	igt_subtest("fbc")
+		subtest(&fbc, false);
+	igt_subtest("psr")
+		subtest(&psr, false);
+	igt_subtest("fbc-suspend")
+		subtest(&fbc, true);
+	igt_subtest("psr-suspend")
+		subtest(&psr, true);
+
+	igt_fixture
+		teardown_environment();
+}