linux-toradex.git/include/linux/soundwire, branch v5.10-rc3

soundwire: enable Data Port test modes

2020-09-23T09:59:29+00:00

Test modes are required for all SoundWire IP, and help debug
integration issues. In theory each port can be configured with a
different mode but to simplify this patch only offers separate
configurations for the Master and Slave ports - this covers 99% of the
intended cases during platform integration.

The test mode value is set via platform-specific ways.

Signed-off-by: Pierre-Louis Bossart 
Reviewed-by: Guennadi Liakhovetski 
Reviewed-by: Rander Wang 
Signed-off-by: Bard Liao 
Link: https://lore.kernel.org/r/20200920193207.31241-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: Add generic bandwidth allocation algorithm

2020-09-18T12:18:51+00:00

This algorithm computes bus parameters like clock frequency, frame
shape and port transport parameters based on active stream(s) running
on the bus.

Developers can also implement their own .compute_params() callback for
specific resource management algorithm, and set if before calling
sdw_add_bus_master()

Credits: this patch is based on an earlier internal contribution by
Vinod Koul, Sanyog Kale, Shreyas Nc and Hardik Shah. All hard-coded
values were removed from the initial contribution to use BIOS
information instead.

Signed-off-by: Bard Liao 
Acked-by: Jaroslav Kysela 
Link: https://lore.kernel.org/r/20200908131520.5712-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: bus: use quirk to filter out invalid parity errors

2020-09-10T05:51:04+00:00

If a Slave device reports with a quirk that its initial parity check
may be incorrect, filter it but keep the parity checks active in
steady state.

Signed-off-by: Pierre-Louis Bossart 
Signed-off-by: Bard Liao 
Reviewed-by: Kai Vehmanen 
Reviewed-by: Guennadi Liakhovetski 
Link: https://lore.kernel.org/r/20200908134521.6781-5-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: slave: add first_interrupt_done status

2020-09-10T05:51:04+00:00

Some Slaves report incorrect information in their interrupt status
registers after a master/bus reset, track the initial interrupt
handling so that quirks can be introduced to filter out incorrect
information while keeping interrupts enabled in steady state.

Signed-off-by: Pierre-Louis Bossart 
Signed-off-by: Bard Liao 
Reviewed-by: Kai Vehmanen 
Reviewed-by: Guennadi Liakhovetski 
Link: https://lore.kernel.org/r/20200908134521.6781-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

ASoC/soundwire: bus: use property to set interrupt masks

2020-09-10T05:51:04+00:00

Add a slave-level property and program the SCP_INT1_MASK as desired by
the codec driver. Since there is no DisCo property this has to be an
implementation-specific firmware property or hard-coded in the driver.

The only functionality change is that implementation-defined
interrupts are no longer set for amplifiers - those interrupts are
typically for jack detection or acoustic event detection/hotwording.

Signed-off-by: Pierre-Louis Bossart 
Signed-off-by: Bard Liao 
Tested-by: Srinivas Kandagatla 
Reviewed-by: Kai Vehmanen 
Reviewed-by: Guennadi Liakhovetski 
Acked-by: Mark Brown 
Link: https://lore.kernel.org/r/20200908134521.6781-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: remove SDW_REG_SHIFT()

2020-09-04T09:16:42+00:00

soundwire had defined SDW_REG_SHIFT to calculate shift values for
bitmasks, but now that we have better things in bitfield.h, remove this.

Signed-off-by: Vinod Koul 
Tested-by: Bard Liao 
Link: https://lore.kernel.org/r/20200903114504.1202143-10-vkoul@kernel.org
Signed-off-by: Vinod Koul

soundwire: define and use addr bit masks

2020-09-04T09:16:41+00:00

Soundwire addr is a 52bit value encoding link, version, unique id,
mfg id, part id and class id. Define bit masks for these and use
FIELD_GET() to extract these fields.

Signed-off-by: Vinod Koul 
Tested-by: Bard Liao 
Link: https://lore.kernel.org/r/20200903114504.1202143-2-vkoul@kernel.org
Signed-off-by: Vinod Koul

soundwire: bus: update multi-link definition with hw sync details

2020-09-03T10:44:39+00:00

Hardware-based synchronization is typically required when the
bus->multi_link flag is set.

On Intel platforms, when the Cadence IP is configured in 'Multi Master
Mode', the hardware synchronization is required even when a stream
only uses a single segment. The existing code only deal with hardware
synchronization when a stream uses more than one segment so to remain
backwards compatible we add a configuration threshold. For Intel cases
this threshold will be set to one, other platforms may be able to use
the SSP-based sync in those cases.

Signed-off-by: Pierre-Louis Bossart 
Signed-off-by: Bard Liao 
Link: https://lore.kernel.org/r/20200901150556.19432-6-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: fix port_ready[] dynamic allocation in mipi_disco

2020-09-03T10:32:29+00:00

The existing code allocates memory for the total number of ports.
This only works if the ports are contiguous, but will break if e.g. a
Devices uses port0, 1, and 14. The port_ready[] array would contain 3
elements, which would lead to an out-of-bounds access. Conversely in
other cases, the wrong port index would be used leading to timeouts on
prepare.

This can be fixed by allocating for the worst-case of 15
ports (DP0..DP14). In addition since the number is now fixed, we can
use an array instead of a dynamic allocation.

Signed-off-by: Pierre-Louis Bossart 
Signed-off-by: Bard Liao 
Reviewed-by: Rander Wang 
Reviewed-by: Guennadi Liakhovetski 
Link: https://lore.kernel.org/r/20200831134318.11443-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: add definition for maximum number of ports

2020-09-03T10:32:29+00:00

A Device may have at most 15 physical ports (DP0, DP1..DP14).

Signed-off-by: Pierre-Louis Bossart 
Signed-off-by: Bard Liao 
Reviewed-by: Rander Wang 
Reviewed-by: Guennadi Liakhovetski 
Link: https://lore.kernel.org/r/20200831134318.11443-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul