From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
To: clemens@ladisch.de, tiwai@suse.de, perex@perex.cz
Cc: alsa-devel@alsa-project.org, ffado-devel@lists.sf.net
Subject: [PATCH 15/39] firewire-lib: Add a new function to check others' connection
Date: Wed, 5 Mar 2014 19:48:03 +0900 [thread overview]
Message-ID: <1394016507-15761-16-git-send-email-o-takashi@sakamocchi.jp> (raw)
In-Reply-To: <1394016507-15761-1-git-send-email-o-takashi@sakamocchi.jp>
Plug Control Registers have two fields related to the number of established
connections, one is 'Broadcast connection counter' and another is
'Point-to-point connection counter'. The driver can know there are established
connections or not to check these fields.
This is considering for JACK/FFADO streaming. Currently, when JACK/FFADO starts
its streaming to the device, cmp_connection_establish() is failed expectedly.
This seems to be enough but there are some devices which needs to change
samplling frequency before trying to establish connections. For such devices,
this functionality is needed.
---
sound/firewire/cmp.c | 18 ++++++++++++++++++
sound/firewire/cmp.h | 1 +
2 files changed, 19 insertions(+)
diff --git a/sound/firewire/cmp.c b/sound/firewire/cmp.c
index 60d2e17..a8199fd 100644
--- a/sound/firewire/cmp.c
+++ b/sound/firewire/cmp.c
@@ -155,6 +155,24 @@ int cmp_connection_init(struct cmp_connection *c,
EXPORT_SYMBOL(cmp_connection_init);
/**
+ * cmp_connection_check_used - check connection is already esablished or not
+ * @c: the connection manager to be checked
+ */
+int cmp_connection_check_used(struct cmp_connection *c, bool *used)
+{
+ __be32 pcr;
+ int err;
+
+ err = snd_fw_transaction(
+ c->resources.unit, TCODE_READ_QUADLET_REQUEST,
+ get_offset(c, false), &pcr, 4, 0);
+ if (err >= 0)
+ *used = (pcr & cpu_to_be32(PCR_BCAST_CONN | PCR_P2P_CONN_MASK));
+ return err;
+}
+EXPORT_SYMBOL(cmp_connection_check_used);
+
+/**
* cmp_connection_destroy - free connection manager resources
* @c: the connection manager
*/
diff --git a/sound/firewire/cmp.h b/sound/firewire/cmp.h
index 9b58448..ebcb484 100644
--- a/sound/firewire/cmp.h
+++ b/sound/firewire/cmp.h
@@ -38,6 +38,7 @@ int cmp_connection_init(struct cmp_connection *connection,
struct fw_unit *unit,
enum cmp_direction direction,
unsigned int pcr_index);
+int cmp_connection_check_used(struct cmp_connection *connection, bool *used);
void cmp_connection_destroy(struct cmp_connection *connection);
int cmp_connection_establish(struct cmp_connection *connection,
--
1.8.3.2
next prev parent reply other threads:[~2014-03-05 10:49 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5316963F.1000206@sakamocchi.jp>
2014-03-05 6:14 ` [GIT PULL v2] Enhancement of support for Firewire devices Takashi Iwai
2014-03-05 11:00 ` Takashi Sakamoto
2014-03-05 11:09 ` Takashi Iwai
2014-03-05 11:23 ` Takashi Sakamoto
2014-03-05 10:47 ` [GIT PULL][PATCH 00/39 " Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 01/39] firewire-lib: Rename functions, structure, member for AMDTP Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 02/39] firewire-lib: Add macros instead of fixed value " Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 03/39] firewire-lib: Add 'direction' member to 'amdtp_stream' structure Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 04/39] firewire-lib: Split some codes into functions to reuse for both streams Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 05/39] firewire-lib: Add support for AMDTP in-stream and PCM capture Takashi Sakamoto
2014-03-09 20:37 ` Clemens Ladisch
2014-03-10 3:55 ` Takashi Sakamoto
2014-03-12 2:00 ` Takashi Sakamoto
2014-03-14 13:50 ` Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 06/39] firewire-lib: Add support for MIDI capture/playback Takashi Sakamoto
2014-03-09 20:48 ` Clemens Ladisch
2014-03-10 4:13 ` Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 07/39] firewire-lib: Give syt value as parameter to handle_out_packet() Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 08/39] firewire-lib: Add support for duplex streams synchronization in blocking mode Takashi Sakamoto
2014-03-09 20:55 ` Clemens Ladisch
2014-03-10 12:21 ` Takashi Sakamoto
2014-03-05 10:47 ` [PATCH 09/39] firewire-lib: Add sort function for transmitted packet Takashi Sakamoto
2014-03-09 21:07 ` Clemens Ladisch
2014-03-10 13:29 ` Takashi Sakamoto
2014-03-11 8:11 ` Clemens Ladisch
2014-03-12 1:23 ` Takashi Sakamoto
2014-03-12 7:21 ` Takashi Iwai
2014-03-05 10:47 ` [PATCH 10/39] firewire-lib: Add transfer delay to synchronized duplex streams Takashi Sakamoto
2014-03-09 21:13 ` Clemens Ladisch
2014-03-10 13:43 ` Takashi Sakamoto
2014-03-11 8:13 ` Clemens Ladisch
2014-03-05 10:47 ` [PATCH 11/39] firewire-lib: Add support for channel mapping Takashi Sakamoto
2014-03-09 21:20 ` Clemens Ladisch
2014-03-10 12:28 ` Takashi Sakamoto
2014-03-10 12:58 ` Takashi Sakamoto
2014-03-11 8:23 ` Clemens Ladisch
2014-03-11 16:03 ` Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 12/39] firewire-lib: Rename macros, variables and functions for CMP Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 13/39] firewire-lib: Add 'direction' member to 'cmp_connection' structure Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 14/39] firewire-lib: Add handling output connection by CMP Takashi Sakamoto
2014-03-09 21:27 ` Clemens Ladisch
2014-03-10 12:30 ` Takashi Sakamoto
2014-03-05 10:48 ` Takashi Sakamoto [this message]
2014-03-05 10:48 ` [PATCH 16/39] firewire-lib: Add some AV/C general commands Takashi Sakamoto
2014-03-09 21:32 ` Clemens Ladisch
2014-03-10 12:46 ` Takashi Sakamoto
2014-03-14 14:10 ` Takashi Sakamoto
2014-03-14 22:18 ` Clemens Ladisch
2014-03-05 10:48 ` [PATCH 17/39] firewire-lib: Add quirks for Fireworks Takashi Sakamoto
2014-03-09 21:39 ` Clemens Ladisch
2014-03-10 12:40 ` Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 18/39] firewire-lib: Add a fallback at RCODE_CANCELLED Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 19/39] fireworks: Add skelton for Fireworks based devices Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 20/39] fireworks: Add transaction and some commands Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 21/39] fireworks: Add connection and stream management Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 22/39] fireworks: Add proc interface for debugging purpose Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 23/39] fireworks: Add MIDI interface Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 24/39] fireworks: Add PCM interface Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 25/39] fireworks: Add hwdep interface Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 26/39] fireworks: Add command/response functionality into " Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 27/39] bebob: Add skelton for BeBoB based devices Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 28/39] bebob: Add commands and connections/streams management Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 29/39] bebob: Add proc interface for debugging purpose Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 30/39] bebob: Add MIDI interface Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 31/39] bebob: Add PCM interface Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 32/39] bebob: Add hwdep interface Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 33/39] bebob: Prepare for device specific operations Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 34/39] bebob: Add support for Terratec PHASE, EWS series and Aureon Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 35/39] bebob: Add support for Yamaha GO series Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 36/39] bebob: Add support for Focusrite Saffire/SaffirePro series Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 37/39] bebob: Add support for M-Audio usual Firewire series Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 38/39] bebob: Add support for M-Audio special " Takashi Sakamoto
2014-03-05 10:48 ` [PATCH 39/39] bebob: Send a cue to load firmware for M-Audio " Takashi Sakamoto
2014-03-07 11:44 ` [GIT PULL v2] Enhancement of support for Firewire devices Takashi Iwai
2014-03-07 14:46 ` Clemens Ladisch
2014-02-28 3:27 [GIT PULL][PATCH 00/39] " Takashi Sakamoto
2014-02-28 3:27 ` [PATCH 15/39] firewire-lib: Add a new function to check others' connection Takashi Sakamoto
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