target/linux/brcm2708/patches-4.19/950-0465-staging-bcm2835-audio-Set-SNDRV_PCM_INFO_SYNC_APPLPT.patch

   1 From b30057f82f95a75c641ff5ffe6bdb4d4507ecd8e Mon Sep 17 00:00:00 2001
   2 From: Takashi Iwai <tiwai@suse.de>
   3 Date: Tue, 4 Sep 2018 17:58:55 +0200
   4 Subject: [PATCH 465/703] staging: bcm2835-audio: Set
   5  SNDRV_PCM_INFO_SYNC_APPLPTR
   6
   7 commit b59d6a5f73501f74848d6700101e7736afe3d54a upstream.
   8
   9 The recent ALSA PCM core supports the SNDRV_PCM_INFO_SYNC_APPLPTR flag
  10 indicating that the driver needs the ack call at each appl_ptr
  11 update.  This is requirement for the indirect PCM implementations like
  12 bcm2835-audio driver, too.
  13
  14 Signed-off-by: Takashi Iwai <tiwai@suse.de>
  15 Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
  16 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  17 ---
  18  drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c | 4 ++--
  19  1 file changed, 2 insertions(+), 2 deletions(-)
  20
  21 --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
  22 +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
  23 @@ -12,7 +12,7 @@
  24  static const struct snd_pcm_hardware snd_bcm2835_playback_hw = {
  25         .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
  26                  SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
  27 -                SNDRV_PCM_INFO_DRAIN_TRIGGER),
  28 +                SNDRV_PCM_INFO_DRAIN_TRIGGER | SNDRV_PCM_INFO_SYNC_APPLPTR),
  29         .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
  30         .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
  31         .rate_min = 8000,
  32 @@ -29,7 +29,7 @@ static const struct snd_pcm_hardware snd
  33  static const struct snd_pcm_hardware snd_bcm2835_playback_spdif_hw = {
  34         .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
  35                  SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
  36 -                SNDRV_PCM_INFO_DRAIN_TRIGGER),
  37 +                SNDRV_PCM_INFO_DRAIN_TRIGGER | SNDRV_PCM_INFO_SYNC_APPLPTR),
  38         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  39         .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_44100 |
  40         SNDRV_PCM_RATE_48000,