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On removal of the driver, the ASoC component should be unregistered
first, before we start releasing any of the other resources.
Fixes: 3df5d0d97289 ("ASoC: apple: mca: Start new platform driver")
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220927113426.49724-3-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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The commit 4ec8179c212f ("ASoC: apple: mca: Postpone requesting of DMA
channels") shuffled around with the requesting and releasing of DMA
channels. It left behind stale release calls from within
apple_mca_release, remove those now.
Fixes: 4ec8179c212f ("ASoC: apple: mca: Postpone requesting of DMA channels")
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220927113426.49724-2-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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Replace the deassertion of the peripheral's shared reset with the
triggering of a pulse on it. This is what we should have been using all
along as the platform's custom is not leaving the reset asserted on
unused peripherals.
Fixes: 3df5d0d97289 ("ASoC: apple: mca: Start new platform driver")
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220927113426.49724-1-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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Move the requesting of DMA channels further down from 'probe' to
'pcm_new'. This is to spare the allocated DMA channel resources as we
typically only ever use one or two of the clusters for PCM streaming.
Before we would request DMA channels for all clusters.
(This is prompted by a change in the Audio DMA Controller driver, which
will now be allocating cache SRAM to channels.)
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220905074030.1293-1-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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The MCA driver selects COMMON_CLK, which leads to misconfiguration
on platforms with HAVE_LEGACY_CLK (under compile test). Kconfig catches
the conflict with the following warning:
WARNING: unmet direct dependencies detected for COMMON_CLK
Depends on [n]: !HAVE_LEGACY_CLK [=y]
Selected by [m]:
- SND_SOC_APPLE_MCA [=m] && SOUND [=m] && !UML && SND [=m] &&
SND_SOC [=m] && (ARCH_APPLE || COMPILE_TEST [=y])
Eventually the build fails with errors like:
>> drivers/clk/clk.c:867:6: error: redefinition of 'clk_unprepare'
867 | void clk_unprepare(struct clk *clk)
| ^~~~~~~~~~~~~
In file included from drivers/clk/clk.c:9:
include/linux/clk.h:303:20: note: previous definition of 'clk_unprepare' with type 'void(struct clk *)'
303 | static inline void clk_unprepare(struct clk *clk)
| ^~~~~~~~~~~~~
which appears to be because COMMON_CLK is selected but HAVE_CLK_PREPARE
is not. In the end it seems we had no business selecting COMMON_CLK from
an unrelated driver like that, so remove the selection. The linux/clk.h
API is there anyway.
Fixes: 3df5d0d97289 ("ASoC: apple: mca: Start new platform driver")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220901113415.27449-1-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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In DAI ops, accesses to the native cluster (of the DAI), and to data of
clusters related to it by a DPCM frontend-backend link, should have
been synchronized by the 'pcm_mutex' lock at ASoC level.
What is not covered are the 'port_driver' accesses on foreign clusters
to which the current cluster has no a priori relation, so fill in
locking for that. (This should only matter in bizarre configurations of
sharing one MCA peripheral between ASoC cards.)
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220824160715.95779-5-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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Add ASoC platform driver for the MCA peripheral found on Apple M1 and
other chips.
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220824160715.95779-4-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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