@@ -10,6 +10,7 @@
#include "dice.h"
#define CALLBACK_TIMEOUT 200
+#define NOTIFICATION_TIMEOUT_MS (2 * MSEC_PER_SEC)
const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT] = {
/* mode 0 */
@@ -24,6 +25,52 @@ const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT] = {
[6] = 192000,
};
+static int ensure_phase_lock(struct snd_dice *dice)
+{
+ unsigned int retries = 10;
+ __be32 reg, stat;
+ int err;
+
+ err = snd_dice_transaction_read_global(dice, GLOBAL_CLOCK_SELECT,
+ ®, sizeof(reg));
+ if (err < 0)
+ return err;
+
+ if (completion_done(&dice->clock_accepted))
+ reinit_completion(&dice->clock_accepted);
+
+ err = snd_dice_transaction_write_global(dice, GLOBAL_CLOCK_SELECT,
+ ®, sizeof(reg));
+ if (err < 0)
+ return err;
+
+ wait_for_completion_timeout(&dice->clock_accepted,
+ msecs_to_jiffies(NOTIFICATION_TIMEOUT_MS));
+
+ /*
+ * Some models don't perform phase lock yet. In this case, transferred
+ * packet includes dicsontinuity. Here, wait till one second.
+ */
+ while (retries-- > 0) {
+ err = snd_dice_transaction_read_global(dice, GLOBAL_STATUS,
+ &stat, sizeof(stat));
+ if (err < 0)
+ return err;
+
+ if ((be32_to_cpu(stat) & 0x01) == STATUS_SOURCE_LOCKED &&
+ ((be32_to_cpu(stat) & STATUS_NOMINAL_RATE_MASK) ==
+ (be32_to_cpu(reg) & STATUS_NOMINAL_RATE_MASK)))
+ break;
+
+ msleep(100);
+ }
+
+ if (retries == 0)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
static void release_resources(struct snd_dice *dice,
struct fw_iso_resources *resources)
{
@@ -222,10 +269,10 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate)
amdtp_stream_set_sync(sync_mode, master, slave);
- err = snd_dice_transaction_set_rate(dice, rate);
+ err = ensure_phase_lock(dice);
if (err < 0) {
dev_err(&dice->unit->device,
- "fail to set sampling rate\n");
+ "fail to ensure phase lock\n");
goto end;
}
@@ -9,8 +9,6 @@
#include "dice.h"
-#define NOTIFICATION_TIMEOUT_MS (2 * MSEC_PER_SEC)
-
static u64 get_subaddr(struct snd_dice *dice, enum snd_dice_addr_type type,
u64 offset)
{
@@ -62,75 +60,6 @@ static unsigned int get_clock_info(struct snd_dice *dice, __be32 *info)
info, 4);
}
-static int set_clock_info(struct snd_dice *dice,
- unsigned int rate, unsigned int source)
-{
- unsigned int retries = 10;
- unsigned int i;
- __be32 info, stat;
- u32 mask;
- u32 clock;
- int err;
-
- err = get_clock_info(dice, &info);
- if (err < 0)
- return err;
-
- clock = be32_to_cpu(info);
- if (source != UINT_MAX) {
- mask = CLOCK_SOURCE_MASK;
- clock &= ~mask;
- clock |= source;
- }
- if (rate != UINT_MAX) {
- for (i = 0; i < ARRAY_SIZE(snd_dice_rates); i++) {
- if (snd_dice_rates[i] == rate)
- break;
- }
- if (i == ARRAY_SIZE(snd_dice_rates))
- return -EINVAL;
-
- mask = CLOCK_RATE_MASK;
- clock &= ~mask;
- clock |= i << CLOCK_RATE_SHIFT;
- }
- info = cpu_to_be32(clock);
-
- if (completion_done(&dice->clock_accepted))
- reinit_completion(&dice->clock_accepted);
-
- err = snd_dice_transaction_write_global(dice, GLOBAL_CLOCK_SELECT,
- &info, 4);
- if (err < 0)
- return err;
-
- wait_for_completion_timeout(&dice->clock_accepted,
- msecs_to_jiffies(NOTIFICATION_TIMEOUT_MS));
-
- /*
- * Some models don't perform phase lock yet. In this case, transferred
- * packet includes dicsontinuity. Here, wait till one second.
- */
- while (retries-- > 0) {
- err = snd_dice_transaction_read_global(dice, GLOBAL_STATUS,
- &stat, sizeof(stat));
- if (err < 0)
- return err;
-
- if ((be32_to_cpu(stat) & 0x01) == STATUS_SOURCE_LOCKED &&
- ((be32_to_cpu(stat) & STATUS_NOMINAL_RATE_MASK) ==
- (be32_to_cpu(info) & STATUS_NOMINAL_RATE_MASK)))
- break;
-
- msleep(100);
- }
-
- if (retries == 0)
- return -ETIMEDOUT;
-
- return 0;
-}
-
int snd_dice_transaction_get_clock_source(struct snd_dice *dice,
unsigned int *source)
{
@@ -164,10 +93,6 @@ int snd_dice_transaction_get_rate(struct snd_dice *dice, unsigned int *rate)
end:
return err;
}
-int snd_dice_transaction_set_rate(struct snd_dice *dice, unsigned int rate)
-{
- return set_clock_info(dice, rate, UINT_MAX);
-}
int snd_dice_transaction_set_enable(struct snd_dice *dice)
{
@@ -154,7 +154,6 @@ static inline int snd_dice_transaction_read_sync(struct snd_dice *dice,
int snd_dice_transaction_get_clock_source(struct snd_dice *dice,
unsigned int *source);
-int snd_dice_transaction_set_rate(struct snd_dice *dice, unsigned int rate);
int snd_dice_transaction_get_rate(struct snd_dice *dice, unsigned int *rate);
int snd_dice_transaction_set_enable(struct snd_dice *dice);
void snd_dice_transaction_clear_enable(struct snd_dice *dice);
In former commits, probing process has no need to set sampling transfer frequency. Although it's OK to drop a function to change the frequency from this module, some models require it before streaming. This seems to be due to phase lock of clock source. This commit moves the function from transaction layer to stream layer, and rename it according to the purpose. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> --- sound/firewire/dice/dice-stream.c | 51 ++++++++++++++++++++++- sound/firewire/dice/dice-transaction.c | 75 ---------------------------------- sound/firewire/dice/dice.h | 1 - 3 files changed, 49 insertions(+), 78 deletions(-)