From 86d03a0f4f575dda7988800a3da8d6e9f776a819 Mon Sep 17 00:00:00 2001 From: Rupesh Gujare Date: Mon, 23 Jul 2012 18:49:46 +0100 Subject: [PATCH] staging: ozwpan: isoc latency for audio burst Set audio latency. This fixes issue where audio clips heard during link outage. Signed-off-by: Rupesh Gujare Signed-off-by: Greg Kroah-Hartman --- drivers/staging/ozwpan/ozpd.c | 8 +------- drivers/staging/ozwpan/ozpd.h | 1 + drivers/staging/ozwpan/ozproto.c | 13 +++++++++++++ drivers/staging/ozwpan/ozproto.h | 6 ++++++ drivers/staging/ozwpan/ozprotocol.h | 6 +++++- 5 files changed, 26 insertions(+), 8 deletions(-) diff --git a/drivers/staging/ozwpan/ozpd.c b/drivers/staging/ozwpan/ozpd.c index 6c287ac..f546b5a 100644 --- a/drivers/staging/ozwpan/ozpd.c +++ b/drivers/staging/ozwpan/ozpd.c @@ -24,12 +24,6 @@ /*------------------------------------------------------------------------------ */ #define OZ_MAX_TX_POOL_SIZE 6 -/* Maximum number of uncompleted isoc frames that can be pending in network. - */ -#define OZ_MAX_SUBMITTED_ISOC 16 -/* Maximum number of uncompleted isoc frames that can be pending in Tx Queue. - */ -#define OZ_MAX_TX_QUEUE_ISOC 32 /*------------------------------------------------------------------------------ */ static struct oz_tx_frame *oz_tx_frame_alloc(struct oz_pd *pd); @@ -854,7 +848,7 @@ int oz_send_isoc_unit(struct oz_pd *pd, u8 ep_num, u8 *data, int len) if (!(pd->mode & OZ_F_ISOC_ANYTIME)) { struct oz_tx_frame *isoc_unit = NULL; int nb = pd->nb_queued_isoc_frames; - if (nb >= OZ_MAX_TX_QUEUE_ISOC) { + if (nb >= pd->isoc_latency) { oz_trace2(OZ_TRACE_TX_FRAMES, "Dropping ISOC Unit nb= %d\n", nb); diff --git a/drivers/staging/ozwpan/ozpd.h b/drivers/staging/ozwpan/ozpd.h index ddf1341..d35b0ea 100644 --- a/drivers/staging/ozwpan/ozpd.h +++ b/drivers/staging/ozwpan/ozpd.h @@ -82,6 +82,7 @@ struct oz_pd { u8 heartbeat_requested; u8 mode; u8 ms_per_isoc; + unsigned isoc_latency; unsigned max_stream_buffering; int nb_queued_frames; int nb_queued_isoc_frames; diff --git a/drivers/staging/ozwpan/ozproto.c b/drivers/staging/ozwpan/ozproto.c index a50ab18..cfb5160 100644 --- a/drivers/staging/ozwpan/ozproto.c +++ b/drivers/staging/ozwpan/ozproto.c @@ -220,6 +220,19 @@ static struct oz_pd *oz_connect_req(struct oz_pd *cur_pd, struct oz_elt *elt, pd->ms_per_isoc = body->ms_per_isoc; if (!pd->ms_per_isoc) pd->ms_per_isoc = 4; + + switch (body->ms_isoc_latency & OZ_LATENCY_MASK) { + case OZ_ONE_MS_LATENCY: + pd->isoc_latency = (body->ms_isoc_latency & + ~OZ_LATENCY_MASK) / pd->ms_per_isoc; + break; + case OZ_TEN_MS_LATENCY: + pd->isoc_latency = ((body->ms_isoc_latency & + ~OZ_LATENCY_MASK) * 10) / pd->ms_per_isoc; + break; + default: + pd->isoc_latency = OZ_MAX_TX_QUEUE_ISOC; + } } if (body->max_len_div16) pd->max_tx_size = ((u16)body->max_len_div16)<<4; diff --git a/drivers/staging/ozwpan/ozproto.h b/drivers/staging/ozwpan/ozproto.h index 7d5b476..755a08d 100644 --- a/drivers/staging/ozwpan/ozproto.h +++ b/drivers/staging/ozwpan/ozproto.h @@ -30,6 +30,12 @@ /* Maximun sizes of tx frames. */ #define OZ_MAX_TX_SIZE 1514 +/* Maximum number of uncompleted isoc frames that can be pending in network. */ +#define OZ_MAX_SUBMITTED_ISOC 16 + +/* Maximum number of uncompleted isoc frames that can be pending in Tx Queue. */ +#define OZ_MAX_TX_QUEUE_ISOC 32 + /* Application handler functions. */ typedef int (*oz_app_init_fn_t)(void); diff --git a/drivers/staging/ozwpan/ozprotocol.h b/drivers/staging/ozwpan/ozprotocol.h index 1e4edbe..17b09b9 100644 --- a/drivers/staging/ozwpan/ozprotocol.h +++ b/drivers/staging/ozwpan/ozprotocol.h @@ -65,6 +65,10 @@ struct oz_hdr { #define OZ_LAST_PN_HALF_CYCLE 127 +#define OZ_LATENCY_MASK 0xc0 +#define OZ_ONE_MS_LATENCY 0x40 +#define OZ_TEN_MS_LATENCY 0x80 + /* Connect request data structure. */ struct oz_elt_connect_req { @@ -73,7 +77,7 @@ struct oz_elt_connect_req { u8 pd_info; u8 session_id; u8 presleep; - u8 resv2; + u8 ms_isoc_latency; u8 host_vendor; u8 keep_alive; u16 apps; -- 2.7.4