Revision e6983afd9254c559acf67dd5f62df824d19851eb authored by Linus Torvalds on 11 July 2019, 03:09:17 UTC, committed by Linus Torvalds on 11 July 2019, 03:09:17 UTC
Pull fsnotify updates from Jan Kara: "This contains cleanups of the fsnotify name removal hook and also a patch to disable fanotify permission events for 'proc' filesystem" * tag 'fsnotify_for_v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: fsnotify: get rid of fsnotify_nameremove() fsnotify: move fsnotify_nameremove() hook out of d_delete() configfs: call fsnotify_rmdir() hook debugfs: call fsnotify_{unlink,rmdir}() hooks debugfs: simplify __debugfs_remove_file() devpts: call fsnotify_unlink() hook tracefs: call fsnotify_{unlink,rmdir}() hooks rpc_pipefs: call fsnotify_{unlink,rmdir}() hooks btrfs: call fsnotify_rmdir() hook fsnotify: add empty fsnotify_{unlink,rmdir}() hooks fanotify: Disallow permission events for proc filesystem
pcm_iec958.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* PCM DRM helpers
*/
#include <linux/export.h>
#include <linux/types.h>
#include <sound/asoundef.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/pcm_iec958.h>
static int create_iec958_consumer(uint rate, uint sample_width,
u8 *cs, size_t len)
{
unsigned int fs, ws;
if (len < 4)
return -EINVAL;
switch (rate) {
case 32000:
fs = IEC958_AES3_CON_FS_32000;
break;
case 44100:
fs = IEC958_AES3_CON_FS_44100;
break;
case 48000:
fs = IEC958_AES3_CON_FS_48000;
break;
case 88200:
fs = IEC958_AES3_CON_FS_88200;
break;
case 96000:
fs = IEC958_AES3_CON_FS_96000;
break;
case 176400:
fs = IEC958_AES3_CON_FS_176400;
break;
case 192000:
fs = IEC958_AES3_CON_FS_192000;
break;
default:
return -EINVAL;
}
if (len > 4) {
switch (sample_width) {
case 16:
ws = IEC958_AES4_CON_WORDLEN_20_16;
break;
case 18:
ws = IEC958_AES4_CON_WORDLEN_22_18;
break;
case 20:
ws = IEC958_AES4_CON_WORDLEN_20_16 |
IEC958_AES4_CON_MAX_WORDLEN_24;
break;
case 24:
case 32: /* Assume 24-bit width for 32-bit samples. */
ws = IEC958_AES4_CON_WORDLEN_24_20 |
IEC958_AES4_CON_MAX_WORDLEN_24;
break;
default:
return -EINVAL;
}
}
memset(cs, 0, len);
cs[0] = IEC958_AES0_CON_NOT_COPYRIGHT | IEC958_AES0_CON_EMPHASIS_NONE;
cs[1] = IEC958_AES1_CON_GENERAL;
cs[2] = IEC958_AES2_CON_SOURCE_UNSPEC | IEC958_AES2_CON_CHANNEL_UNSPEC;
cs[3] = IEC958_AES3_CON_CLOCK_1000PPM | fs;
if (len > 4)
cs[4] = ws;
return len;
}
/**
* snd_pcm_create_iec958_consumer - create consumer format IEC958 channel status
* @runtime: pcm runtime structure with ->rate filled in
* @cs: channel status buffer, at least four bytes
* @len: length of channel status buffer
*
* Create the consumer format channel status data in @cs of maximum size
* @len corresponding to the parameters of the PCM runtime @runtime.
*
* Drivers may wish to tweak the contents of the buffer after creation.
*
* Returns: length of buffer, or negative error code if something failed.
*/
int snd_pcm_create_iec958_consumer(struct snd_pcm_runtime *runtime, u8 *cs,
size_t len)
{
return create_iec958_consumer(runtime->rate,
snd_pcm_format_width(runtime->format),
cs, len);
}
EXPORT_SYMBOL(snd_pcm_create_iec958_consumer);
/**
* snd_pcm_create_iec958_consumer_hw_params - create IEC958 channel status
* @hw_params: the hw_params instance for extracting rate and sample format
* @cs: channel status buffer, at least four bytes
* @len: length of channel status buffer
*
* Create the consumer format channel status data in @cs of maximum size
* @len corresponding to the parameters of the PCM runtime @runtime.
*
* Drivers may wish to tweak the contents of the buffer after creation.
*
* Returns: length of buffer, or negative error code if something failed.
*/
int snd_pcm_create_iec958_consumer_hw_params(struct snd_pcm_hw_params *params,
u8 *cs, size_t len)
{
return create_iec958_consumer(params_rate(params), params_width(params),
cs, len);
}
EXPORT_SYMBOL(snd_pcm_create_iec958_consumer_hw_params);
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