drm/tests/kms/kms-steal-crtc.c

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/*
* 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.
*/
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#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;
}