summaryrefslogtreecommitdiffstats
path: root/drivers/soundwire
diff options
context:
space:
mode:
authorRander Wang <rander.wang@intel.com>2020-01-14 17:52:27 -0600
committerVinod Koul <vkoul@kernel.org>2020-02-13 15:57:37 +0530
commitbfaa3549541cf8bf16246dfd9b4d2f3af679be86 (patch)
tree4b541353b9ceb2b5f645d330d9fc9c4f18a1d552 /drivers/soundwire
parent60835022e196de1a4d73c249e99f34b7204ca267 (diff)
downloadlinux-bfaa3549541cf8bf16246dfd9b4d2f3af679be86.tar.bz2
soundwire: stream: don't program ports when a stream that has not been prepared
In the Intel QA multi-pipelines test case, there are two pipelines for playback and capture on the same bus. The test fails with an error when setting port params: [ 599.224812] rt711 sdw:0:25d:711:0: invalid dpn_prop direction 1 port_num 0 [ 599.224815] sdw_program_slave_port_params failed -22 [ 599.224819] intel-sdw sdw-master-0: Program transport params failed: -22 [ 599.224822] intel-sdw sdw-master-0: Program params failed: -22 [ 599.224828] sdw_enable_stream: SDW0 Pin2-Playback: done This problem is root-caused to the programming of the capture stream ports while it is not yet prepared, the calling sequence is: (1) hw_params for playback. The playback stream provide the port information to Bus. (2) stream_prepare for playback, Transport and port parameters are computed for playback. (3) hw_params for capture. The capture stream provide the port information to Bus, but it has not been prepared so is not accounted for in the bandwidth allocation. (4) stream_enable for playback. Program transport and port parameters for all masters and slaves. Since the transport and port parameters are not computed for capture stream, sdw_program_slave_port_params will generate a error when setting port params for capture. in step (4), we should only program the ports for the stream that have been prepared. A stream that is only in CONFIGURED state should be ignored, its ports will be programmed when it becomes PREPARED. Tested on Comet Lake. GitHub issue: https://github.com/thesofproject/linux/issues/1637 Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Rander Wang <rander.wang@intel.com> Link: https://lore.kernel.org/r/20200114235227.14502-6-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire')
-rw-r--r--drivers/soundwire/stream.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index da10f38298c0..00348d1fc606 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -603,13 +603,25 @@ static int sdw_notify_config(struct sdw_master_runtime *m_rt)
* and Slave(s)
*
* @bus: SDW bus instance
+ * @prepare: true if sdw_program_params() is called by _prepare.
*/
-static int sdw_program_params(struct sdw_bus *bus)
+static int sdw_program_params(struct sdw_bus *bus, bool prepare)
{
struct sdw_master_runtime *m_rt;
int ret = 0;
list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) {
+
+ /*
+ * this loop walks through all master runtimes for a
+ * bus, but the ports can only be configured while
+ * explicitly preparing a stream or handling an
+ * already-prepared stream otherwise.
+ */
+ if (!prepare &&
+ m_rt->stream->state == SDW_STREAM_CONFIGURED)
+ continue;
+
ret = sdw_program_port_params(m_rt);
if (ret < 0) {
dev_err(bus->dev,
@@ -1502,7 +1514,7 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream,
program_params:
/* Program params */
- ret = sdw_program_params(bus);
+ ret = sdw_program_params(bus, true);
if (ret < 0) {
dev_err(bus->dev, "Program params failed: %d\n", ret);
goto restore_params;
@@ -1602,7 +1614,7 @@ static int _sdw_enable_stream(struct sdw_stream_runtime *stream)
bus = m_rt->bus;
/* Program params */
- ret = sdw_program_params(bus);
+ ret = sdw_program_params(bus, false);
if (ret < 0) {
dev_err(bus->dev, "Program params failed: %d\n", ret);
return ret;
@@ -1687,7 +1699,7 @@ static int _sdw_disable_stream(struct sdw_stream_runtime *stream)
struct sdw_bus *bus = m_rt->bus;
/* Program params */
- ret = sdw_program_params(bus);
+ ret = sdw_program_params(bus, false);
if (ret < 0) {
dev_err(bus->dev, "Program params failed: %d\n", ret);
return ret;
@@ -1769,7 +1781,7 @@ static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
m_rt->ch_count * m_rt->stream->params.bps;
/* Program params */
- ret = sdw_program_params(bus);
+ ret = sdw_program_params(bus, false);
if (ret < 0) {
dev_err(bus->dev, "Program params failed: %d\n", ret);
return ret;