The driver manually implement the interface-wide rate symmetry enforcement
in hw_params(), which suffers from the same problem addressed in the
previous patch: the restriction is not visible in the hw parameter
constraints, so a stream with a mismatching rate only finds out via
-EINVAL late in the stream setup.
The ASoC core already provides this feature through the DAI's
'symmetric_rate' flag: when another stream of the DAI is active,
soc_pcm_apply_symmetry() constrains the rate at open time so the
restriction shows up during parameter refinement, and
soc_pcm_params_symmetry() still rejects a mismatch at hw_params()
time as a backstop.
Set 'symmetric_rate' on the I2S encoder DAI and drop the open-coded
check along with the now unused 'rate' member of struct gx_iface.
Signed-off-by: Valerio Setti <vsetti@baylibre.com>
Link: https://patch.msgid.link/20260710-aiu-improve-quirk-check-v1-3-2fdd1b6f8896@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
The bs-quirk incompatibility check has two flaws:
- It only rejects one direction of the mismatch. A stream that does
not require the quirk is rejected while a quirked stream is active,
but the opposite is not true: a stream requiring the quirk passes
the check while a non-quirked stream is active, silently
reprogramming the shared mclk/bclk divider with the 50% increase
and corrupting the output of the running stream.
- 'bs_quirk' is only cleared in hw_free() when the last substream
closes, but userspace may legally stop/reconfigure/start the stream
without an intervening hw_free. Reconfiguring a single stream
from the quirked configuration (8ch/16-bit) to one that does not
need the quirk therefore fails with -EINVAL due to the stale flag.
Drop the interface-wide flag and instead compare the quirk
requirement of the incoming parameters against the committed
configuration of the opposite stream at hw_params() time. The
committed channels/width are cleared in hw_free() so that a released
stream no longer constrains the other one.
Signed-off-by: Valerio Setti <vsetti@baylibre.com>
Link: https://patch.msgid.link/20260710-aiu-improve-quirk-check-v1-1-2fdd1b6f8896@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
These files are the basic block which allow to shape I2S in GX devices
the same as the AXG ones: the DAI backend only controls the interface
(i.e. clocks and pins) whereas a formatter takes care of properly
formatting the data.
gx-formatter and gx-interface are strongly inspired to axg-tdm-formatter
and axg-tdm, respectively. The long term plan is to join the two platforms
to use the same formatter solution.
There is only a minor addition here compared to what has been done for
AXG and it's "gx_formatter_create()" which is required in order to let
already existing AIU code to make use of this formatter without making any
devicetree change.
Signed-off-by: Valerio Setti <vsetti@baylibre.com>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://patch.msgid.link/20260610-reshape-aiu-as-axg-v2-1-cac3663a8b51@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
