tests: kms: Implement CRTC stealing test

This test program sets a mode and framebuffer on a connector and cycles
through all CRTCs, moving the connector to each of them in turn. This is
useful to verify that CRTC stealing is properly handled in the DRM core
and drivers.

Signed-off-by: Thierry Reding <treding@nvidia.com>

tests/kms/Makefile.am

@@ -18,3 +18,14 @@ libkms_test_la_SOURCES = \
 
 libkms_test_la_LIBADD = \
 	$(top_builddir)/libdrm.la
+
+if HAVE_INSTALL_TESTS
+bin_PROGRAMS = \
+	kms-steal-crtc
+else
+noinst_PROGRAMS = \
+	kms-steal-crtc
+endif
+
+kms_steal_crtc_SOURCES = kms-steal-crtc.c
+kms_steal_crtc_LDADD = libkms-test.la ../util/libutil.la $(CAIRO_LIBS)

tests/kms/kms-steal-crtc.c

@@ -0,0 +1,161 @@
+/*
+ * Copyright © 2014 NVIDIA 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <drm_fourcc.h>
+
+#include "util/pattern.h"
+#include "libkms-test.h"
+
+static void signal_handler(int signum)
+{
+}
+
+int main(int argc, char *argv[])
+{
+	struct kms_framebuffer *fb;
+	struct kms_screen *screen;
+	struct kms_device *device;
+	unsigned int index = 0;
+	struct sigaction sa;
+	int fd, err;
+	void *ptr;
+
+	if (argc < 2) {
+		fprintf(stderr, "usage: %s DEVICE\n", argv[0]);
+		return 1;
+	}
+
+	memset(&sa, 0, sizeof(sa));
+	sa.sa_handler = signal_handler;
+
+	err = sigaction(SIGINT, &sa, NULL);
+	if (err < 0) {
+		fprintf(stderr, "sigaction() failed: %m\n");
+		return 1;
+	}
+
+	fd = open(argv[1], O_RDWR);
+	if (fd < 0) {
+		fprintf(stderr, "open() failed: %m\n");
+		return 1;
+	}
+
+	device = kms_device_open(fd);
+	if (!device) {
+		fprintf(stderr, "kms_device_open() failed: %m\n");
+		return 1;
+	}
+
+	if (device->num_screens < 1) {
+		fprintf(stderr, "no screens found\n");
+		kms_device_close(device);
+		close(fd);
+		return 1;
+	}
+
+	/* TODO: allow command-line to override */
+	screen = device->screens[0];
+
+	printf("Using screen %s, resolution %ux%u\n", screen->name,
+	       screen->width, screen->height);
+
+	fb = kms_framebuffer_create(device, screen->width, screen->height,
+				    DRM_FORMAT_XRGB8888);
+	if (!fb) {
+		fprintf(stderr, "kms_framebuffer_create() failed\n");
+		return 1;
+	}
+
+	err = kms_framebuffer_map(fb, &ptr);
+	if (err < 0) {
+		fprintf(stderr, "kms_framebuffer_map() failed: %d\n", err);
+		return 1;
+	}
+
+	util_fill_pattern(fb->format, UTIL_PATTERN_SMPTE, &ptr, fb->width,
+			  fb->height, fb->pitch);
+
+	kms_framebuffer_unmap(fb);
+
+	err = kms_screen_set(screen, device->crtcs[index++], fb);
+	if (err < 0) {
+		fprintf(stderr, "kms_screen_set() failed: %d\n", err);
+		return 1;
+	}
+
+	while (true) {
+		int nfds = STDIN_FILENO + 1;
+		struct timeval timeout;
+		fd_set fds;
+
+		memset(&timeout, 0, sizeof(timeout));
+		timeout.tv_sec = 5;
+		timeout.tv_usec = 0;
+
+		FD_ZERO(&fds);
+		FD_SET(STDIN_FILENO, &fds);
+
+		err = select(nfds, &fds, NULL, NULL, &timeout);
+		if (err < 0) {
+			if (errno == EINTR)
+				break;
+
+			fprintf(stderr, "select() failed: %d\n", errno);
+			break;
+		}
+
+		if (err > 0) {
+			if (FD_ISSET(STDIN_FILENO, &fds))
+				break;
+		}
+
+		/* switch CRTC */
+		if (index >= device->num_crtcs)
+			index = 0;
+
+		err = kms_screen_set(screen, device->crtcs[index], fb);
+		if (err < 0) {
+			fprintf(stderr, "kms_screen_set() failed: %d\n", err);
+			break;
+		}
+
+		index++;
+	}
+
+	kms_framebuffer_free(fb);
+	kms_device_close(device);
+	close(fd);
+
+	return 0;
+}