diff options
Diffstat (limited to 'drivers/media/cec/cec-core.c')
| -rw-r--r-- | drivers/media/cec/cec-core.c | 72 |
1 files changed, 59 insertions, 13 deletions
diff --git a/drivers/media/cec/cec-core.c b/drivers/media/cec/cec-core.c index a9f9525db9ae..b0c87f9ea08f 100644 --- a/drivers/media/cec/cec-core.c +++ b/drivers/media/cec/cec-core.c @@ -1,20 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * cec-core.c - HDMI Consumer Electronics Control framework - Core * * Copyright 2016 Cisco Systems, Inc. and/or its affiliates. All rights reserved. - * - * This program is free software; you may redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * 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 <linux/errno.h> @@ -207,6 +195,55 @@ void cec_register_cec_notifier(struct cec_adapter *adap, EXPORT_SYMBOL_GPL(cec_register_cec_notifier); #endif +#ifdef CONFIG_DEBUG_FS +static ssize_t cec_error_inj_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *sf = file->private_data; + struct cec_adapter *adap = sf->private; + char *buf; + char *line; + char *p; + + buf = memdup_user_nul(ubuf, min_t(size_t, PAGE_SIZE, count)); + if (IS_ERR(buf)) + return PTR_ERR(buf); + p = buf; + while (p && *p) { + p = skip_spaces(p); + line = strsep(&p, "\n"); + if (!*line || *line == '#') + continue; + if (!adap->ops->error_inj_parse_line(adap, line)) { + kfree(buf); + return -EINVAL; + } + } + kfree(buf); + return count; +} + +static int cec_error_inj_show(struct seq_file *sf, void *unused) +{ + struct cec_adapter *adap = sf->private; + + return adap->ops->error_inj_show(adap, sf); +} + +static int cec_error_inj_open(struct inode *inode, struct file *file) +{ + return single_open(file, cec_error_inj_show, inode->i_private); +} + +static const struct file_operations cec_error_inj_fops = { + .open = cec_error_inj_open, + .write = cec_error_inj_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; +#endif + struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops, void *priv, const char *name, u32 caps, u8 available_las) @@ -346,7 +383,16 @@ int cec_register_adapter(struct cec_adapter *adap, pr_warn("cec-%s: Failed to create status file\n", adap->name); debugfs_remove_recursive(adap->cec_dir); adap->cec_dir = NULL; + return 0; } + if (!adap->ops->error_inj_show || !adap->ops->error_inj_parse_line) + return 0; + adap->error_inj_file = debugfs_create_file("error-inj", 0644, + adap->cec_dir, adap, + &cec_error_inj_fops); + if (IS_ERR_OR_NULL(adap->error_inj_file)) + pr_warn("cec-%s: Failed to create error-inj file\n", + adap->name); #endif return 0; } |