This format is similar to existing SNDRV_PCM_FORMAT_{S,U}20_3 that keep 20-bit PCM samples in 3 bytes, however i.MX6 platform SSI FIFO does not allow 3-byte accesses (including DMA) so a 4-byte (more conventional) format is needed for it.
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| @@ -214,6 +214,11 @@ typedef int __bitwise snd_pcm_format_t; · 213 unmodified lines | ||
| 214 | 214 | #define SNDRV_PCM_FORMAT_IMA_ADPCM ((__force snd_pcm_format_t) 22) |
| 215 | 215 | #define SNDRV_PCM_FORMAT_MPEG ((__force snd_pcm_format_t) 23) |
| 216 | 216 | #define SNDRV_PCM_FORMAT_GSM ((__force snd_pcm_format_t) 24) |
| 217 | +#define SNDRV_PCM_FORMAT_S20_LE ((__force snd_pcm_format_t) 25) /* in four bytes, LSB justified */ | |
| 218 | +#define SNDRV_PCM_FORMAT_S20_BE ((__force snd_pcm_format_t) 26) /* in four bytes, LSB justified */ | |
| 219 | +#define SNDRV_PCM_FORMAT_U20_LE ((__force snd_pcm_format_t) 27) /* in four bytes, LSB justified */ | |
| 220 | +#define SNDRV_PCM_FORMAT_U20_BE ((__force snd_pcm_format_t) 28) /* in four bytes, LSB justified */ | |
| 221 | +/* gap in the numbering for a future standard linear format */ | |
| 217 | 222 | #define SNDRV_PCM_FORMAT_SPECIAL ((__force snd_pcm_format_t) 31) |
| 218 | 223 | #define SNDRV_PCM_FORMAT_S24_3LE ((__force snd_pcm_format_t) 32) /* in three bytes */ |
| 219 | 224 | #define SNDRV_PCM_FORMAT_S24_3BE ((__force snd_pcm_format_t) 33) /* in three bytes */ |
| @@ -248,6 +253,8 @@ typedef int __bitwise snd_pcm_format_t; · 28 unmodified lines | ||
| 248 | 253 | #define SNDRV_PCM_FORMAT_FLOAT SNDRV_PCM_FORMAT_FLOAT_LE |
| 249 | 254 | #define SNDRV_PCM_FORMAT_FLOAT64 SNDRV_PCM_FORMAT_FLOAT64_LE |
| 250 | 255 | #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE |
| 256 | +#define SNDRV_PCM_FORMAT_S20 SNDRV_PCM_FORMAT_S20_LE | |
| 257 | +#define SNDRV_PCM_FORMAT_U20 SNDRV_PCM_FORMAT_U20_LE | |
| 251 | 258 | #endif |
| 252 | 259 | #ifdef SNDRV_BIG_ENDIAN |
| 253 | 260 | #define SNDRV_PCM_FORMAT_S16 SNDRV_PCM_FORMAT_S16_BE |
| @@ -259,6 +266,8 @@ typedef int __bitwise snd_pcm_format_t; · 5 unmodified lines | ||
| 259 | 266 | #define SNDRV_PCM_FORMAT_FLOAT SNDRV_PCM_FORMAT_FLOAT_BE |
| 260 | 267 | #define SNDRV_PCM_FORMAT_FLOAT64 SNDRV_PCM_FORMAT_FLOAT64_BE |
| 261 | 268 | #define SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE |
| 269 | +#define SNDRV_PCM_FORMAT_S20 SNDRV_PCM_FORMAT_S20_BE | |
| 270 | +#define SNDRV_PCM_FORMAT_U20 SNDRV_PCM_FORMAT_U20_BE | |
| 262 | 271 | #endif |
| 263 | 272 | |
| 264 | 273 | typedef int __bitwise snd_pcm_subformat_t; |