From 7cafc65b3aa1b6970f92211c55712f115d876cfc Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Mon, 7 Mar 2016 22:35:45 +0900 Subject: [PATCH] ALSA: dice: force to add two pcm devices for listed models Some models reduce the number of available isochronous streams for higher sampling transfer frequency. Such models bring an issue about how to add PCM substreams. When at lower sampling transfer frequency, the models reports whole available streams, thus this driver can add enough number of PCM substreams at probing time. On the other hand, at higher sampling transfer frequency, this driver can just add reduced number of PCM substreams. After probed, even if the sampling transfer frequency is changed to lower rate, fewer PCM substreams are actually available. This is inconvenience. For the reason, this commit adds a list so that this driver assume models on the list to have two pairs of PCM substreams. This list keeps the name of model in which the number of available streams differs depending on sampling transfer frequency. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/dice/dice-pcm.c | 24 +++++++++++++++--------- sound/firewire/dice/dice.c | 41 +++++++++++++++++++++++++++++++++++++++++ sound/firewire/dice/dice.h | 2 ++ 3 files changed, 58 insertions(+), 9 deletions(-) diff --git a/sound/firewire/dice/dice-pcm.c b/sound/firewire/dice/dice-pcm.c index 05e2e18..4aa0249 100644 --- a/sound/firewire/dice/dice-pcm.c +++ b/sound/firewire/dice/dice-pcm.c @@ -332,16 +332,22 @@ int snd_dice_create_pcm(struct snd_dice *dice) int err; /* Check whether PCM substreams are required. */ - max_capture = max_playback = 0; - err = snd_dice_transaction_read_tx(dice, TX_NUMBER, ®, sizeof(reg)); - if (err < 0) - return err; - max_capture = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS); + if (dice->force_two_pcms) { + max_capture = max_playback = 2; + } else { + max_capture = max_playback = 0; + err = snd_dice_transaction_read_tx(dice, TX_NUMBER, ®, + sizeof(reg)); + if (err < 0) + return err; + max_capture = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS); - err = snd_dice_transaction_read_rx(dice, RX_NUMBER, ®, sizeof(reg)); - if (err < 0) - return err; - max_playback = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS); + err = snd_dice_transaction_read_rx(dice, RX_NUMBER, ®, + sizeof(reg)); + if (err < 0) + return err; + max_playback = min_t(unsigned int, be32_to_cpu(reg), MAX_STREAMS); + } for (i = 0; i < MAX_STREAMS; i++) { capture = playback = 0; diff --git a/sound/firewire/dice/dice.c b/sound/firewire/dice/dice.c index f7303a6..8b64aef 100644 --- a/sound/firewire/dice/dice.c +++ b/sound/firewire/dice/dice.c @@ -13,6 +13,8 @@ MODULE_LICENSE("GPL v2"); #define OUI_WEISS 0x001c6a #define OUI_LOUD 0x000ff2 +#define OUI_FOCUSRITE 0x00130e +#define OUI_TCELECTRONIC 0x001486 #define DICE_CATEGORY_ID 0x04 #define WEISS_CATEGORY_ID 0x00 @@ -20,6 +22,36 @@ MODULE_LICENSE("GPL v2"); #define PROBE_DELAY_MS (2 * MSEC_PER_SEC) +/* + * Some models support several isochronous channels, while these streams are not + * always available. In this case, add the model name to this list. + */ +static bool force_two_pcm_support(struct fw_unit *unit) +{ + const char *const models[] = { + /* TC Electronic models. */ + "StudioKonnekt48", + /* Focusrite models. */ + "SAFFIRE_PRO_40", + "LIQUID_SAFFIRE_56", + "SAFFIRE_PRO_40_1", + }; + char model[32]; + unsigned int i; + int err; + + err = fw_csr_string(unit->directory, CSR_MODEL, model, sizeof(model)); + if (err < 0) + return false; + + for (i = 0; i < ARRAY_SIZE(models); i++) { + if (strcmp(models[i], model) == 0) + break; + } + + return i < ARRAY_SIZE(models); +} + static int check_dice_category(struct fw_unit *unit) { struct fw_device *device = fw_parent_device(unit); @@ -44,6 +76,12 @@ static int check_dice_category(struct fw_unit *unit) break; } } + + if (vendor == OUI_FOCUSRITE || vendor == OUI_TCELECTRONIC) { + if (force_two_pcm_support(unit)) + return 0; + } + if (vendor == OUI_WEISS) category = WEISS_CATEGORY_ID; else if (vendor == OUI_LOUD) @@ -150,6 +188,9 @@ static void do_registration(struct work_struct *work) if (err < 0) return; + if (force_two_pcm_support(dice->unit)) + dice->force_two_pcms = true; + err = snd_dice_transaction_init(dice); if (err < 0) goto error; diff --git a/sound/firewire/dice/dice.h b/sound/firewire/dice/dice.h index 8fba87d8..e6c0785 100644 --- a/sound/firewire/dice/dice.h +++ b/sound/firewire/dice/dice.h @@ -97,6 +97,8 @@ struct snd_dice { bool global_enabled; struct completion clock_accepted; unsigned int substreams_counter; + + bool force_two_pcms; }; enum snd_dice_addr_type { -- 2.7.4