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linux/include/linux/soundwire
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Pierre-Louis Bossart 154cfc3d27 soundwire: bus: introduce controller_id 
[ Upstream commit 6543ac13c6 ]

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.

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/stable/20231017160933.12624-2-pierre-louis.bossart%40linux.intel.com
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20231017160933.12624-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Stable-dep-of: 8a8a9ac8a4 ("soundwire: fix initializing sysfs for same devices on different buses")
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-01-31 16:18:47 -08:00
..
sdw.h soundwire: bus: introduce controller_id 2024-01-31 16:18:47 -08:00
sdw_amd.h soundwire: amd: add runtime pm ops for AMD SoundWire manager driver 2023-04-12 15:30:36 +05:30
sdw_intel.h soundwire updates for 6.6 2023-09-03 10:20:57 -07:00
sdw_registers.h Char / Misc driver updates for 5.11-rc1 2020-12-15 14:10:09 -08:00
sdw_type.h driver core: make struct device_type.uevent() take a const * 2023-01-27 13:45:36 +01:00