[PATCH 0/3] ALSA: bebob: enable MIDI message transmission for multiple ports
Hi,
Although below models supported by ALSA bebob driver have multiple MIDI ports, the driver just adds one pair of MIDI ports for ALSA Rawmidi interface:
* M-Audio ProjectMix I/O * ESI Quatafire 610
The cause comes from two bugs:
* The driver registers the number of MIDI conformant data channels into AM824 data block processing layer, instead of the number of MIDI ports. * For Quatafire, the driver counts plugs with MIDI type, however the number of physical MIDI ports is expressed in the number of channels on the plugs.
This patchset enables MIDI message transmission for multiple ports.
Takashi Sakamoto (3): ALSA: bebob: code refactoring for stream format detection ALSA: bebob: detect the number of available MIDI ports ALSA: bebob: enable to deliver MIDI messages for multiple ports
sound/firewire/bebob/bebob.h | 2 + sound/firewire/bebob/bebob_command.c | 36 ++++++ sound/firewire/bebob/bebob_stream.c | 163 ++++++++++++++------------- 3 files changed, 120 insertions(+), 81 deletions(-)
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 o-takashi@sakamocchi.jp --- 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 bbae04793c50..d96d2feb15a8 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;
Current implementation counts the number of input/output plugs for MIDI type and uses the count as the number of physical MIDI ports. However, the number of channels of the port represents the count.
This commit fixes the bug by additional vendor-specific AVC command extension.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/bebob/bebob.h | 2 + sound/firewire/bebob/bebob_command.c | 36 ++++++++++++ sound/firewire/bebob/bebob_stream.c | 83 +++++++++++++++++----------- 3 files changed, 89 insertions(+), 32 deletions(-)
diff --git a/sound/firewire/bebob/bebob.h b/sound/firewire/bebob/bebob.h index d1ad9a8451bc..4e0ed84adbee 100644 --- a/sound/firewire/bebob/bebob.h +++ b/sound/firewire/bebob/bebob.h @@ -200,6 +200,8 @@ int avc_bridgeco_get_plug_ch_pos(struct fw_unit *unit, int avc_bridgeco_get_plug_type(struct fw_unit *unit, u8 addr[AVC_BRIDGECO_ADDR_BYTES], enum avc_bridgeco_plug_type *type); +int avc_bridgeco_get_plug_ch_count(struct fw_unit *unit, u8 addr[AVC_BRIDGECO_ADDR_BYTES], + unsigned int *ch_count); int avc_bridgeco_get_plug_section_type(struct fw_unit *unit, u8 addr[AVC_BRIDGECO_ADDR_BYTES], unsigned int id, u8 *type); diff --git a/sound/firewire/bebob/bebob_command.c b/sound/firewire/bebob/bebob_command.c index e276ab8f9006..022df09c68ff 100644 --- a/sound/firewire/bebob/bebob_command.c +++ b/sound/firewire/bebob/bebob_command.c @@ -143,6 +143,42 @@ int avc_bridgeco_get_plug_type(struct fw_unit *unit, return err; }
+int avc_bridgeco_get_plug_ch_count(struct fw_unit *unit, u8 addr[AVC_BRIDGECO_ADDR_BYTES], + unsigned int *ch_count) +{ + u8 *buf; + int err; + + buf = kzalloc(12, GFP_KERNEL); + if (buf == NULL) + return -ENOMEM; + + // Info type is 'plug type'. + avc_bridgeco_fill_plug_info_extension_command(buf, addr, 0x02); + + err = fcp_avc_transaction(unit, buf, 12, buf, 12, + BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | + BIT(6) | BIT(7) | BIT(9)); + if (err < 0) + ; + else if (err < 11) + err = -EIO; + else if (buf[0] == 0x08) // NOT IMPLEMENTED + err = -ENOSYS; + else if (buf[0] == 0x0a) // REJECTED + err = -EINVAL; + else if (buf[0] == 0x0b) // IN TRANSITION + err = -EAGAIN; + if (err < 0) + goto end; + + *ch_count = buf[10]; + err = 0; +end: + kfree(buf); + return err; +} + int avc_bridgeco_get_plug_ch_pos(struct fw_unit *unit, u8 addr[AVC_BRIDGECO_ADDR_BYTES], u8 *buf, unsigned int len) diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c index d96d2feb15a8..23579a73e038 100644 --- a/sound/firewire/bebob/bebob_stream.c +++ b/sound/firewire/bebob/bebob_stream.c @@ -844,6 +844,49 @@ static int fill_stream_formations(struct snd_bebob *bebob, u8 addr[AVC_BRIDGECO_ return err; }
+static int detect_midi_ports(struct snd_bebob *bebob, + const struct snd_bebob_stream_formation *formats, + u8 addr[AVC_BRIDGECO_ADDR_BYTES], enum avc_bridgeco_plug_dir plug_dir, + unsigned int plug_count, unsigned int *midi_ports) +{ + int i; + int err = 0; + + *midi_ports = 0; + + /// Detect the number of available MIDI ports when packet has MIDI conformant data channel. + for (i = 0; i < SND_BEBOB_STRM_FMT_ENTRIES; ++i) { + if (formats[i].midi > 0) + break; + } + if (i >= SND_BEBOB_STRM_FMT_ENTRIES) + return 0; + + for (i = 0; i < plug_count; ++i) { + enum avc_bridgeco_plug_type plug_type; + unsigned int ch_count; + + avc_bridgeco_fill_unit_addr(addr, plug_dir, AVC_BRIDGECO_PLUG_UNIT_EXT, i); + + err = avc_bridgeco_get_plug_type(bebob->unit, addr, &plug_type); + if (err < 0) { + dev_err(&bebob->unit->device, + "fail to get type for external %d plug %d: %d\n", + plug_dir, i, err); + break; + } else if (plug_type != AVC_BRIDGECO_PLUG_TYPE_MIDI) { + continue; + } + + err = avc_bridgeco_get_plug_ch_count(bebob->unit, addr, &ch_count); + if (err < 0) + break; + *midi_ports += ch_count; + } + + return err; +} + static int seek_msu_sync_input_plug(struct snd_bebob *bebob) { @@ -886,8 +929,6 @@ int snd_bebob_stream_discover(struct snd_bebob *bebob) { const struct snd_bebob_clock_spec *clk_spec = bebob->spec->clock; u8 plugs[AVC_PLUG_INFO_BUF_BYTES], addr[AVC_BRIDGECO_ADDR_BYTES]; - enum avc_bridgeco_plug_type type; - unsigned int i; int err;
/* the number of plugs for isoc in/out, ext in/out */ @@ -918,37 +959,15 @@ int snd_bebob_stream_discover(struct snd_bebob *bebob) if (err < 0) goto end;
- /* count external input plugs for MIDI */ - bebob->midi_input_ports = 0; - for (i = 0; i < plugs[2]; i++) { - avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_IN, - AVC_BRIDGECO_PLUG_UNIT_EXT, i); - err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); - if (err < 0) { - dev_err(&bebob->unit->device, - "fail to get type for external in plug %d: %d\n", - i, err); - goto end; - } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { - bebob->midi_input_ports++; - } - } + err = detect_midi_ports(bebob, bebob->rx_stream_formations, addr, AVC_BRIDGECO_PLUG_DIR_IN, + plugs[2], &bebob->midi_input_ports); + if (err < 0) + goto end;
- /* count external output plugs for MIDI */ - bebob->midi_output_ports = 0; - for (i = 0; i < plugs[3]; i++) { - avc_bridgeco_fill_unit_addr(addr, AVC_BRIDGECO_PLUG_DIR_OUT, - AVC_BRIDGECO_PLUG_UNIT_EXT, i); - err = avc_bridgeco_get_plug_type(bebob->unit, addr, &type); - if (err < 0) { - dev_err(&bebob->unit->device, - "fail to get type for external out plug %d: %d\n", - i, err); - goto end; - } else if (type == AVC_BRIDGECO_PLUG_TYPE_MIDI) { - bebob->midi_output_ports++; - } - } + err = detect_midi_ports(bebob, bebob->tx_stream_formations, addr, AVC_BRIDGECO_PLUG_DIR_OUT, + plugs[3], &bebob->midi_output_ports); + if (err < 0) + goto end;
/* for check source of clock later */ if (!clk_spec)
Current implementation of bebob driver doesn't correctly handle the case that the device has multiple MIDI ports. The cause is the number of MIDI conformant data channels is passed to AM824 data block processing layer.
This commit fixes the bug.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/bebob/bebob_stream.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c index 23579a73e038..b612ee3e33b6 100644 --- a/sound/firewire/bebob/bebob_stream.c +++ b/sound/firewire/bebob/bebob_stream.c @@ -517,20 +517,22 @@ int snd_bebob_stream_init_duplex(struct snd_bebob *bebob) static int keep_resources(struct snd_bebob *bebob, struct amdtp_stream *stream, unsigned int rate, unsigned int index) { - struct snd_bebob_stream_formation *formation; + unsigned int pcm_channels; + unsigned int midi_ports; struct cmp_connection *conn; int err;
if (stream == &bebob->tx_stream) { - formation = bebob->tx_stream_formations + index; + pcm_channels = bebob->tx_stream_formations[index].pcm; + midi_ports = bebob->midi_input_ports; conn = &bebob->out_conn; } else { - formation = bebob->rx_stream_formations + index; + pcm_channels = bebob->rx_stream_formations[index].pcm; + midi_ports = bebob->midi_output_ports; conn = &bebob->in_conn; }
- err = amdtp_am824_set_parameters(stream, rate, formation->pcm, - formation->midi, false); + err = amdtp_am824_set_parameters(stream, rate, pcm_channels, midi_ports, false); if (err < 0) return err;
On Sun, 21 Mar 2021 04:28:28 +0100, Takashi Sakamoto wrote:
Hi,
Although below models supported by ALSA bebob driver have multiple MIDI ports, the driver just adds one pair of MIDI ports for ALSA Rawmidi interface:
- M-Audio ProjectMix I/O
- ESI Quatafire 610
The cause comes from two bugs:
- The driver registers the number of MIDI conformant data channels into AM824 data block processing layer, instead of the number of MIDI ports.
- For Quatafire, the driver counts plugs with MIDI type, however the number of physical MIDI ports is expressed in the number of channels on the plugs.
This patchset enables MIDI message transmission for multiple ports.
Takashi Sakamoto (3): ALSA: bebob: code refactoring for stream format detection ALSA: bebob: detect the number of available MIDI ports ALSA: bebob: enable to deliver MIDI messages for multiple ports
Applied all three patches now. Thanks.
Takashi
participants (2)
-
Takashi Iwai -
Takashi Sakamoto