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soundwire: stream: enable hw_sync as needed by hardware 

Use platform-specific information to decide when to use hw_sync, not
only a number of links > 1.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200901150556.19432-8-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2020-09-01 23:05:53 +08:00 committed by Vinod Koul
parent 94eed66107
commit 063ff4e568
1 changed files with 9 additions and 6 deletions
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15
drivers/soundwire/stream.c
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@ -689,9 +689,9 @@ static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count)
/*
* Set the multi_link flag only when both the hardware supports
* and there is a stream handled by multiple masters
* and hardware-based sync is required
*/
multi_link = bus->multi_link && (m_rt_count > 1);
multi_link = bus->multi_link && (m_rt_count >= bus->hw_sync_min_links);
if (multi_link)
ret = sdw_transfer_defer(bus, wr_msg, &bus->defer_msg);
@ -760,13 +760,16 @@ static int do_bank_switch(struct sdw_stream_runtime *stream)
const struct sdw_master_ops *ops;
struct sdw_bus *bus;
bool multi_link = false;
int m_rt_count;
int ret = 0;
m_rt_count = stream->m_rt_count;
list_for_each_entry(m_rt, &stream->master_list, stream_node) {
bus = m_rt->bus;
ops = bus->ops;
if (bus->multi_link) {
if (bus->multi_link && m_rt_count >= bus->hw_sync_min_links) {
multi_link = true;
mutex_lock(&bus->msg_lock);
}
@ -787,7 +790,7 @@ static int do_bank_switch(struct sdw_stream_runtime *stream)
* synchronized across all Masters and happens later as a
* part of post_bank_switch ops.
*/
ret = sdw_bank_switch(bus, stream->m_rt_count);
ret = sdw_bank_switch(bus, m_rt_count);
if (ret < 0) {
dev_err(bus->dev, "Bank switch failed: %d\n", ret);
goto error;
@ -813,7 +816,7 @@ static int do_bank_switch(struct sdw_stream_runtime *stream)
ret);
goto error;
}
} else if (bus->multi_link && stream->m_rt_count > 1) {
} else if (multi_link) {
dev_err(bus->dev,
"Post bank switch ops not implemented\n");
goto error;
@ -831,7 +834,7 @@ static int do_bank_switch(struct sdw_stream_runtime *stream)
goto error;
}
if (bus->multi_link)
if (multi_link)
mutex_unlock(&bus->msg_lock);
}