diff options
Diffstat (limited to 'lib/igt_sysfs.c')
-rw-r--r-- | lib/igt_sysfs.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/lib/igt_sysfs.c b/lib/igt_sysfs.c index c19821da..570329d0 100644 --- a/lib/igt_sysfs.c +++ b/lib/igt_sysfs.c @@ -34,7 +34,11 @@ #include <fcntl.h> #include <unistd.h> #include <i915_drm.h> +#include <dirent.h> +#include <unistd.h> +#include <fcntl.h> +#include "igt_core.h" #include "igt_sysfs.h" /** @@ -392,3 +396,105 @@ bool igt_sysfs_set_boolean(int dir, const char *attr, bool value) { return igt_sysfs_printf(dir, attr, "%d", value) == 1; } + +/** + * kick_fbcon: + * @enable: boolean value + * + * This functions enables/disables the text console running on top of the + * framebuffer device. + */ +void kick_fbcon(bool enable) +{ + char buf[128]; + const char *path = "/sys/class/vtconsole"; + DIR *dir; + struct dirent *vtcon; + + dir = opendir(path); + if (!dir) + return; + + while ((vtcon = readdir(dir))) { + int fd, len; + + if (strncmp(vtcon->d_name, "vtcon", 5)) + continue; + + sprintf(buf, "%s/%s/name", path, vtcon->d_name); + fd = open(buf, O_RDONLY); + if (fd < 0) + continue; + + len = read(fd, buf, sizeof(buf) - 1); + close(fd); + if (len >= 0) + buf[len] = '\0'; + + if (strstr(buf, "frame buffer device")) { + sprintf(buf, "%s/%s/bind", path, vtcon->d_name); + fd = open(buf, O_WRONLY); + if (fd != -1) { + if (enable) + igt_ignore_warn(write(fd, "1\n", 2)); + else + igt_ignore_warn(write(fd, "0\n", 2)); + close(fd); + } + break; + } + } + closedir(dir); +} + +/** + * kick_snd_hda_intel: + * + * This functions unbinds the snd_hda_intel driver so the module cand be + * unloaded. + * + */ +void kick_snd_hda_intel(void) +{ + DIR *dir; + struct dirent *snd_hda; + int fd; size_t len; + + const char *dpath = "/sys/bus/pci/drivers/snd_hda_intel"; + const char *path = "/sys/bus/pci/drivers/snd_hda_intel/unbind"; + const char *devid = "0000:"; + + fd = open(path, O_WRONLY); + if (fd < 0) { + return; + } + + dir = opendir(dpath); + if (!dir) + goto out; + + len = strlen(devid); + while ((snd_hda = readdir(dir))) { + struct stat st; + char fpath[PATH_MAX]; + + if (*snd_hda->d_name == '.') + continue; + + snprintf(fpath, sizeof(fpath), "%s/%s", dpath, snd_hda->d_name); + if (lstat(fpath, &st)) + continue; + + if (!S_ISLNK(st.st_mode)) + continue; + + if (!strncmp(devid, snd_hda->d_name, len)) { + igt_ignore_warn(write(fd, snd_hda->d_name, + strlen(snd_hda->d_name))); + } + } + + closedir(dir); +out: + close(fd); +} |