SoundWire: introduce controller_id #4616
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@bardliao can you take a look if you have spare cycles. I don't have a local device with me so can't really smoke/stress test this change. |
@plbossart I tested it on a TGL RVP and it works. rt711's device name is sdw:0:0:025d:0711:00 with this PR, and playback/capture works. |
vijendarmukunda
suggested changes
Oct 5, 2023
The existing SoundWire support misses a clear Controller/Manager hiearchical definition to deal with all variants across SOC vendors. a) Intel platforms have one controller with 4 or more Managers. b) AMD platforms have two controllers with one Manager each, but due to BIOS issues use two different link_id values within the scope of a single controller. c) QCOM platforms have one or more controller with one Manager each. This patch adds a 'controller_id' which can be set by higher levels. If assigned to -1, the controller_id will be set to the system-unique IDA-assigned bus->id. The main change is that the bus->id is no longer used for any device name, which makes the definition completely predictable and not dependent on any enumeration order. The bus->id is only used to insert the Managers in the stream rt context. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
If same devices with same device IDs are present on different soundwire buses, the probe fails due to conflicting device names and sysfs entries: sysfs: cannot create duplicate filename '/bus/soundwire/devices/sdw:0:0217:0204:00:0' The link ID is 0 for both devices, so they should be differentiated by the controller ID. Add the controller ID so, the device names and sysfs entries look like: sdw:1:0:0217:0204:00:0 -> ../../../devices/platform/soc@0/6ab0000.soundwire-controller/sdw-master-1-0/sdw:1:0:0217:0204:00:0 sdw:3:0:0217:0204:00:0 -> ../../../devices/platform/soc@0/6b10000.soundwire-controller/sdw-master-3-0/sdw:3:0:0217:0204:00:0 [PLB changes: use bus->controller_id instead of bus->id] Fixes: 7c3cd18 ("soundwire: Add Master registration") Cc: <stable@vger.kernel.org> Co-developed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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vijendarmukunda
approved these changes
Oct 6, 2023
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verified changes and it's working fine on AMD platforms. |
bardliao
approved these changes
Oct 6, 2023
plbossart
requested review from
lgirdwood,
ranj063,
kv2019i,
dbaluta and
ujfalusi
as code owners
plbossart
merged commit 41edbee
into
thesofproject:topic/sof-dev
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Alternate solution to @krzk suggested patches on alsa-devel.