From caa271510687f3ce3eed3a120cd2a6f71bc49223 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Sun, 21 Mar 2021 12:28:29 +0900 Subject: [PATCH] ALSA: bebob: code refactoring for stream format detection ALSA bebob driver scans supported formats of packet for each direction when probing the target device. Some helper functions are used for the scanning, however its implementation is not necessarily irredundant. This commit refactors the helper functions to remove redundant codes. Signed-off-by: Takashi Sakamoto Link: https://lore.kernel.org/r/20210321032831.340278-2-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai --- sound/firewire/bebob/bebob_stream.c | 68 +++++++++++++------------------------ 1 file changed, 24 insertions(+), 44 deletions(-) diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c index bbae047..d96d2fe 100644 --- a/sound/firewire/bebob/bebob_stream.c +++ b/sound/firewire/bebob/bebob_stream.c @@ -796,42 +796,42 @@ parse_stream_formation(u8 *buf, unsigned int len, return 0; } -static int -fill_stream_formations(struct snd_bebob *bebob, enum avc_bridgeco_plug_dir dir, - unsigned short pid) +static int fill_stream_formations(struct snd_bebob *bebob, u8 addr[AVC_BRIDGECO_ADDR_BYTES], + enum avc_bridgeco_plug_dir plug_dir, unsigned int plug_id, + struct snd_bebob_stream_formation *formations) { + enum avc_bridgeco_plug_type plug_type; u8 *buf; - struct snd_bebob_stream_formation *formations; unsigned int len, eid; - u8 addr[AVC_BRIDGECO_ADDR_BYTES]; int err; + avc_bridgeco_fill_unit_addr(addr, plug_dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, plug_id); + + err = avc_bridgeco_get_plug_type(bebob->unit, addr, &plug_type); + if (err < 0) { + dev_err(&bebob->unit->device, + "Fail to get type for isoc %d plug 0: %d\n", plug_dir, err); + return err; + } else if (plug_type != AVC_BRIDGECO_PLUG_TYPE_ISOC) + return -ENXIO; + buf = kmalloc(FORMAT_MAXIMUM_LENGTH, GFP_KERNEL); if (buf == NULL) return -ENOMEM; - if (dir == AVC_BRIDGECO_PLUG_DIR_IN) - formations = bebob->rx_stream_formations; - else - formations = bebob->tx_stream_formations; + for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; ++eid) { + avc_bridgeco_fill_unit_addr(addr, plug_dir, AVC_BRIDGECO_PLUG_UNIT_ISOC, plug_id); - for (eid = 0; eid < SND_BEBOB_STRM_FMT_ENTRIES; eid++) { len = FORMAT_MAXIMUM_LENGTH; - avc_bridgeco_fill_unit_addr(addr, dir, - AVC_BRIDGECO_PLUG_UNIT_ISOC, pid); - err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf, - &len, eid); - /* No entries remained. */ + err = avc_bridgeco_get_plug_strm_fmt(bebob->unit, addr, buf, &len, eid); + // No entries remained. if (err == -EINVAL && eid > 0) { err = 0; break; } else if (err < 0) { dev_err(&bebob->unit->device, - "fail to get stream format %d for isoc %s plug %d:%d\n", - eid, - (dir == AVC_BRIDGECO_PLUG_DIR_IN) ? "in" : - "out", - pid, err); + "fail to get stream format %d for isoc %d plug %d:%d\n", + eid, plug_dir, plug_id, err); break; } @@ -908,33 +908,13 @@ int snd_bebob_stream_discover(struct snd_bebob *bebob) goto end; } - avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, - AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); - err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); - if (err < 0) { - dev_err(&bebob->unit->device, - "fail to get type for isoc in plug 0: %d\n", err); - goto end; - } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { - err = -ENOSYS; - goto end; - } - err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_IN, 0); + err = fill_stream_formations(bebob, addr, AVC_BRIDGECO_PLUG_DIR_IN, 0, + bebob->rx_stream_formations); if (err < 0) goto end; - avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, - AVC_BRIDGECO_PLUG_UNIT_ISOC, 0); - err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); - if (err < 0) { - dev_err(&bebob->unit->device, - "fail to get type for isoc out plug 0: %d\n", err); - goto end; - } else if (type != AVC_BRIDGECO_PLUG_TYPE_ISOC) { - err = -ENOSYS; - goto end; - } - err = fill_stream_formations(bebob, AVC_BRIDGECO_PLUG_DIR_OUT, 0); + err = fill_stream_formations(bebob, addr, AVC_BRIDGECO_PLUG_DIR_OUT, 0, + bebob->tx_stream_formations); if (err < 0) goto end; -- 2.7.4