linux-stable/drivers/soundwire
Pierre-Louis Bossart 8fba8acd39 soundwire: cadence: add debugfs interface for PDI loopbacks
For debug, it's interesting to create a loopback stream for each link
and use debugfs to set a source and target PDI. The target PDI would
need to be an RX port and use the same register configurations as the
source PDI. This capability allows e.g. for the headphone playback
stream to be snooped on the headset capture stream, or alternatively
for the addition of a dedicated loopback stream, in addition of
regular capture for that link.

This patch only adds the debugfs part, the port/PDI handling will be
handled in the next patches.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20210714032209.11284-10-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-08-02 11:08:22 +05:30
..
bus.c soundwire: bus: squelch error returned by mockup devices 2021-08-02 11:08:22 +05:30
bus.h soundwire: export sdw_update() and sdw_update_no_pm() 2021-06-21 13:00:42 +01:00
bus_type.c soundwire: bus: use correct driver name in error messages 2021-03-30 11:51:42 +05:30
cadence_master.c soundwire: cadence: add debugfs interface for PDI loopbacks 2021-08-02 11:08:22 +05:30
cadence_master.h soundwire: cadence: add debugfs interface for PDI loopbacks 2021-08-02 11:08:22 +05:30
debugfs.c soundwire: Revert "soundwire: debugfs: use controller id instead of link_id" 2021-02-06 15:52:21 +05:30
dmi-quirks.c soundwire: dmi-quirks: add quirk for Intel 'Bishop County' NUC M15 2021-07-23 11:36:49 +05:30
generic_bandwidth_allocation.c soundwire: bandwidth allocation: improve error messages 2021-05-11 17:34:07 +05:30
intel.c soundwire: cadence: add paranoid check on self-clearing bits 2021-08-02 09:19:45 +05:30
intel.h soundwire: intel: move to auxiliary bus 2021-06-14 10:12:26 +05:30
intel_init.c soundwire: intel: move to auxiliary bus 2021-06-14 10:12:26 +05:30
Kconfig soundwire: intel: move to auxiliary bus 2021-06-14 10:12:26 +05:30
Makefile soundwire: Intel: introduce DMI quirks for HP Spectre x360 Convertible 2021-03-22 17:33:10 +05:30
master.c soundwire: master: use pm_runtime_set_active() on add 2020-12-02 12:49:34 +05:30
mipi_disco.c soundwire: fix port_ready[] dynamic allocation in mipi_disco 2020-09-03 16:02:29 +05:30
qcom.c soundwire: qcom: fix handling of qcom,ports-block-pack-mode 2021-05-13 11:14:13 +05:30
slave.c soundwire/ASoC: add leading zeroes in peripheral device name 2021-05-11 17:26:56 +05:30
stream.c soundwire: stream: don't program mockup device ports 2021-08-02 11:08:22 +05:30
sysfs_local.h soundwire: sysfs: add slave status and device number before probe 2020-09-28 11:17:43 +05:30
sysfs_slave.c soundwire: sysfs: Constify static struct attribute_group 2021-01-19 20:21:20 +05:30
sysfs_slave_dpn.c soundwire: Fix DEBUG_LOCKS_WARN_ON for uninitialized attribute 2020-11-24 14:08:51 +05:30