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ALSA: firewire-lib: code refactoring for jumbo payload quirk

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A new macro is added to describe the maximum number of cycles to accept
cycle skip by jumbo payload quirk.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210518084557.102681-10-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2021-05-18 17:45:55 +09:00 committed by Takashi Iwai
parent a092f000b9
commit 6a3ce97da2
1 changed files with 6 additions and 1 deletions
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7
sound/firewire/amdtp-stream.c
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@ -64,6 +64,11 @@
#define IT_PKT_HEADER_SIZE_CIP 8 // For 2 CIP header.
#define IT_PKT_HEADER_SIZE_NO_CIP 0 // Nothing.
// The initial firmware of OXFW970 can postpone transmission of packet during finishing
// asynchronous transaction. This module accepts 5 cycles to skip as maximum to avoid buffer
// overrun. Actual device can skip more, then this module stops the packet streaming.
#define IR_JUMBO_PAYLOAD_MAX_SKIP_CYCLES 5
static void pcm_period_work(struct work_struct *work);
/**
@ -316,7 +321,7 @@ unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s)
unsigned int cip_header_size = 0;
if (s->flags & CIP_JUMBO_PAYLOAD)
multiplier = 5;
multiplier = IR_JUMBO_PAYLOAD_MAX_SKIP_CYCLES;
if (!(s->flags & CIP_NO_HEADER))
cip_header_size = sizeof(__be32) * 2;