1 files changed, 148 insertions, 0 deletions
diff --git a/tests/kms_invalid_dotclock.c b/tests/kms_invalid_dotclock.c
new file mode 100644
index 00000000..43f768fd
--- /dev/null
+++ b/tests/kms_invalid_dotclock.c
@@ -0,0 +1,148 @@
+/*
+ * 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 <stdbool.h>
+
+IGT_TEST_DESCRIPTION("Make sure all modesets are rejected when the requested dotclock is too high");
+
+typedef struct {
+	int drm_fd;
+	igt_display_t display;
+	igt_output_t *output;
+	drmModeResPtr res;
+	int max_dotclock;
+} data_t;
+
+static bool has_scaling_mode_prop(data_t *data)
+{
+	return kmstest_get_property(data->drm_fd,
+				    data->output->id,
+				    DRM_MODE_OBJECT_CONNECTOR,
+				    "scaling mode",
+				    NULL, NULL, NULL);
+}
+
+static int
+test_output(data_t *data)
+{
+	igt_output_t *output = data->output;
+	drmModeModeInfo mode;
+	struct igt_fb fb;
+	int i;
+
+	/*
+	 * FIXME When we have a fixed mode, the kernel will ignore
+	 * the user timings apart from hdisplay/vdisplay. Should
+	 * fix the kernel to at least make sure the requested
+	 * refresh rate as specified by the user timings will
+	 * roughly match the user will get. For now skip the
+	 * test on  any connector with a fixed mode.
+	 */
+	if (has_scaling_mode_prop(data))
+		return 0;
+
+	/*
+	 * FIXME test every mode we have to be more
+	 * sure everything is really getting rejected?
+	 */
+	mode = *igt_output_get_mode(output);
+	mode.clock = data->max_dotclock + 1;
+
+	igt_create_fb(data->drm_fd,
+		      mode.hdisplay, mode.vdisplay,
+		      DRM_FORMAT_XRGB8888,
+		      LOCAL_DRM_FORMAT_MOD_NONE,
+		      &fb);
+
+	for (i = 0; i < data->res->count_crtcs; i++) {
+		int ret;
+
+		igt_info("Checking pipe %c connector %s with mode %s\n",
+			 'A'+i, output->name, mode.name);
+
+		ret = drmModeSetCrtc(data->drm_fd, data->res->crtcs[i],
+				     fb.fb_id, 0, 0,
+				     &output->id, 1, &mode);
+		igt_assert_lt(ret, 0);
+	}
+
+	igt_remove_fb(data->drm_fd, &fb);
+
+	return 1;
+}
+
+static void test(data_t *data)
+{
+	int valid_connectors = 0;
+
+	for_each_connected_output(&data->display, data->output) {
+		valid_connectors += test_output(data);
+	}
+
+	igt_require_f(valid_connectors, "No suitable connectors found\n");
+}
+
+static int i915_max_dotclock(void)
+{
+	char buf[4096];
+	char *s;
+	int max_dotclock = 0;
+
+	igt_debugfs_read("i915_frequency_info", buf);
+	s = strstr(buf, "Max pixel clock frequency:");
+	igt_assert(s);
+	igt_assert_eq(sscanf(s, "Max pixel clock frequency: %d kHz", &max_dotclock), 1);
+
+	/* 100 Mhz to 5 GHz seem like reasonable values to expect */
+	igt_assert_lt(max_dotclock, 5000000);
+	igt_assert_lt(100000, max_dotclock);
+
+	return max_dotclock;
+}
+
+static data_t data;
+
+igt_simple_main
+{
+	igt_skip_on_simulation();
+
+	data.drm_fd = drm_open_driver_master(DRIVER_INTEL);
+	igt_require_intel(data.drm_fd);
+
+	igt_enable_connectors();
+	kmstest_set_vt_graphics_mode();
+	igt_display_init(&data.display, data.drm_fd);
+	data.res = drmModeGetResources(data.drm_fd);
+	kmstest_unset_all_crtcs(data.drm_fd, data.res);
+
+	data.max_dotclock = i915_max_dotclock();
+	igt_info("Max dotclock: %d kHz\n", data.max_dotclock);
+
+	test(&data);
+
+	igt_display_fini(&data.display);
+	igt_reset_connectors();
+	drmModeFreeResources(data.res);
+}