target/linux/bcm27xx/patches-4.19/950-0398-staging-bcm2835-audio-Simplify-PCM-creation-helpers.patch

   1 From 706f9b2b95a2fff44f92deada99545036c249658 Mon Sep 17 00:00:00 2001
   2 From: Takashi Iwai <tiwai@suse.de>
   3 Date: Tue, 4 Sep 2018 17:58:56 +0200
   4 Subject: [PATCH] staging: bcm2835-audio: Simplify PCM creation helpers
   5
   6 commit 74470ffeb9aed5548654cfca881bf1d7469fe9c4 upstream.
   7
   8 All three functions to create PCM objects are fairly resemble, and can
   9 be unified to a single common helper.
  10
  11 Signed-off-by: Takashi Iwai <tiwai@suse.de>
  12 Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
  13 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  14 ---
  15  .../vc04_services/bcm2835-audio/bcm2835-pcm.c | 87 ++++---------------
  16  .../vc04_services/bcm2835-audio/bcm2835.c     | 17 +++-
  17  .../vc04_services/bcm2835-audio/bcm2835.h     |  9 +-
  18  3 files changed, 32 insertions(+), 81 deletions(-)
  19
  20 --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
  21 +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
  22 @@ -324,91 +324,36 @@ static const struct snd_pcm_ops snd_bcm2
  23  };
  24
  25  /* create a pcm device */
  26 -int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, u32 numchannels)
  27 +int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, const char *name,
  28 +                       int idx, enum snd_bcm2835_route route,
  29 +                       u32 numchannels, bool spdif)
  30  {
  31         struct snd_pcm *pcm;
  32         int err;
  33
  34 -       err = snd_pcm_new(chip->card, "bcm2835 ALSA", 0, numchannels, 0, &pcm);
  35 -       if (err < 0)
  36 -               return err;
  37 -       pcm->private_data = chip;
  38 -       pcm->nonatomic = true;
  39 -       strcpy(pcm->name, "bcm2835 ALSA");
  40 -       chip->pcm = pcm;
  41 -       chip->dest = AUDIO_DEST_AUTO;
  42 -       chip->volume = 0;
  43 -       chip->mute = CTRL_VOL_UNMUTE; /*disable mute on startup */
  44 -       /* set operators */
  45 -       snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
  46 -                       &snd_bcm2835_playback_ops);
  47 -
  48 -       /* pre-allocation of buffers */
  49 -       /* NOTE: this may fail */
  50 -       snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
  51 -                                             chip->card->dev->parent,
  52 -                                             snd_bcm2835_playback_hw.buffer_bytes_max,
  53 -                                             snd_bcm2835_playback_hw.buffer_bytes_max);
  54 -
  55 -       return 0;
  56 -}
  57 -
  58 -int snd_bcm2835_new_spdif_pcm(struct bcm2835_chip *chip)
  59 -{
  60 -       struct snd_pcm *pcm;
  61 -       int err;
  62 -
  63 -       err = snd_pcm_new(chip->card, "bcm2835 ALSA", 1, 1, 0, &pcm);
  64 -       if (err < 0)
  65 -               return err;
  66 -
  67 -       pcm->private_data = chip;
  68 -       pcm->nonatomic = true;
  69 -       strcpy(pcm->name, "bcm2835 IEC958/HDMI");
  70 -       chip->pcm_spdif = pcm;
  71 -       snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
  72 -                       &snd_bcm2835_playback_spdif_ops);
  73 -
  74 -       /* pre-allocation of buffers */
  75 -       /* NOTE: this may fail */
  76 -       snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
  77 -               chip->card->dev->parent,
  78 -               snd_bcm2835_playback_spdif_hw.buffer_bytes_max, snd_bcm2835_playback_spdif_hw.buffer_bytes_max);
  79 -
  80 -       return 0;
  81 -}
  82 -
  83 -int snd_bcm2835_new_simple_pcm(struct bcm2835_chip *chip,
  84 -                              const char *name,
  85 -                              enum snd_bcm2835_route route,
  86 -                              u32 numchannels)
  87 -{
  88 -       struct snd_pcm *pcm;
  89 -       int err;
  90 -
  91 -       err = snd_pcm_new(chip->card, name, 0, numchannels,
  92 -                         0, &pcm);
  93 +       err = snd_pcm_new(chip->card, name, idx, numchannels, 0, &pcm);
  94         if (err)
  95                 return err;
  96
  97         pcm->private_data = chip;
  98         pcm->nonatomic = true;
  99         strcpy(pcm->name, name);
 100 -       chip->pcm = pcm;
 101 -       chip->dest = route;
 102 -       chip->volume = 0;
 103 -       chip->mute = CTRL_VOL_UNMUTE;
 104 +       if (!spdif) {
 105 +               chip->dest = route;
 106 +               chip->volume = 0;
 107 +               chip->mute = CTRL_VOL_UNMUTE;
 108 +       }
 109
 110         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 111 +                       spdif ? &snd_bcm2835_playback_spdif_ops :
 112                         &snd_bcm2835_playback_ops);
 113
 114 -       snd_pcm_lib_preallocate_pages_for_all(
 115 -               pcm,
 116 -               SNDRV_DMA_TYPE_DEV,
 117 -               chip->card->dev->parent,
 118 -               snd_bcm2835_playback_hw.buffer_bytes_max,
 119 -               snd_bcm2835_playback_hw.buffer_bytes_max);
 120 +       snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 121 +               chip->card->dev->parent, 128 * 1024, 128 * 1024);
 122
 123 +       if (spdif)
 124 +               chip->pcm_spdif = pcm;
 125 +       else
 126 +               chip->pcm = pcm;
 127         return 0;
 128  }
 129 -
 130 --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
 131 +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
 132 @@ -138,17 +138,26 @@ static int bcm2835_audio_alsa_newpcm(str
 133  {
 134         int err;
 135
 136 -       err = snd_bcm2835_new_pcm(chip, numchannels - 1);
 137 +       err = snd_bcm2835_new_pcm(chip, "bcm2835 ALSA", 0, AUDIO_DEST_AUTO,
 138 +                                 numchannels - 1, false);
 139         if (err)
 140                 return err;
 141
 142 -       err = snd_bcm2835_new_spdif_pcm(chip);
 143 +       err = snd_bcm2835_new_pcm(chip, "bcm2835 IEC958/HDMI", 1, 0, 1, true);
 144         if (err)
 145                 return err;
 146
 147         return 0;
 148  }
 149
 150 +static int bcm2835_audio_simple_newpcm(struct bcm2835_chip *chip,
 151 +                                      const char *name,
 152 +                                      enum snd_bcm2835_route route,
 153 +                                      u32 numchannels)
 154 +{
 155 +       return snd_bcm2835_new_pcm(chip, name, 0, route, numchannels, false);
 156 +}
 157 +
 158  static struct bcm2835_audio_driver bcm2835_audio_alsa = {
 159         .driver = {
 160                 .name = "bcm2835_alsa",
 161 @@ -169,7 +178,7 @@ static struct bcm2835_audio_driver bcm28
 162         .shortname = "bcm2835 HDMI",
 163         .longname  = "bcm2835 HDMI",
 164         .minchannels = 1,
 165 -       .newpcm = snd_bcm2835_new_simple_pcm,
 166 +       .newpcm = bcm2835_audio_simple_newpcm,
 167         .newctl = snd_bcm2835_new_hdmi_ctl,
 168         .route = AUDIO_DEST_HDMI
 169  };
 170 @@ -182,7 +191,7 @@ static struct bcm2835_audio_driver bcm28
 171         .shortname = "bcm2835 Headphones",
 172         .longname  = "bcm2835 Headphones",
 173         .minchannels = 1,
 174 -       .newpcm = snd_bcm2835_new_simple_pcm,
 175 +       .newpcm = bcm2835_audio_simple_newpcm,
 176         .newctl = snd_bcm2835_new_headphones_ctl,
 177         .route = AUDIO_DEST_HEADPHONES
 178  };
 179 --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.h
 180 +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.h
 181 @@ -84,12 +84,9 @@ struct bcm2835_alsa_stream {
 182  };
 183
 184  int snd_bcm2835_new_ctl(struct bcm2835_chip *chip);
 185 -int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, u32 numchannels);
 186 -int snd_bcm2835_new_spdif_pcm(struct bcm2835_chip *chip);
 187 -int snd_bcm2835_new_simple_pcm(struct bcm2835_chip *chip,
 188 -                              const char *name,
 189 -                              enum snd_bcm2835_route route,
 190 -                              u32 numchannels);
 191 +int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, const char *name,
 192 +                       int idx, enum snd_bcm2835_route route,
 193 +                       u32 numchannels, bool spdif);
 194
 195  int snd_bcm2835_new_hdmi_ctl(struct bcm2835_chip *chip);
 196  int snd_bcm2835_new_headphones_ctl(struct bcm2835_chip *chip);