[PATCH v5 0/4] Rockchip I2S/TDM controller

Fri Oct 1 10:15:27 PDT 2021

Hello,

this is version 5 of the I2S/TDM driver patchset. A big thanks
to everyone who has provided their valuable feedback so far.

Changes in v5:
 driver:
 - change comment style of the first comment to C++ style
 - make refcount non-atomic, as it's only ever used inside
   a spinlock
 - use newer SND_SOC_DAIFMT_CB* defines
 - change ternary statements to if/else conditions
 - make _clk_compensation_put return 1 if clock changed
 - implement set_bclk_ratio callback
 - always set half frame sync mode in TDM mode
 - automatically enable mclk-calibrate mode when the clocks for
   it are specified in the device tree
 bindings:
 - add Reviewed-by: Rob Herring
 - drop rockchip,frame-width property (done by set_bclk_ratio)
 - drop rockchip,fsync-half-frame property
 - drop rockchip,mclk-calibrate property
 dts:
 - drop empty codec block from Quartz64 device tree

Changes in v4:
 driver:
 - factor TDE/RDE enable/disable into their own inlined functions
 - add an RDE disable in a location where it looks like it was
   forgotten (rxctrl else), judging by corresponding TDE code
 - remove parentheses around CLK_PPM_MIN/MAX values
 - wording + titlecasing in the clock compensation control
 - use if statement in precious_reg instead
 - refactor rockchip_i2s_io_multiplex to have the switch statements
   in a function call to make the function less unwieldy
 - get rid of IS_ERR checks around clk enable/disable calls where
   already checked before by the probe
 - reworded some error message strings
 - fix potential deadlock in txrxctrl found by Sugar Zhang
   using spin_lock_irqsave
 - fix potential deadlock in trcm_mode found by Sugar Zhang
   using spin_lock_irqsave
 - use devm_platform_get_and_ioremap_resource in probe
 - only set DMA things if controller has capture/playback ability.
   Did not move this into init_dai because I'd then need to pass in
   the res and probe it earlier in the function, and it's also used
   elsewhere in the probe function
 - use _get_optional_exclusive for reset controls, as some controllers
   only have capture or playback capability
 bindings:
 - remove status = "okay" since that's the default
 - change the path configs to be an enum
 - rename "foo" to "bus"
 - make resets optional as controller may lack either playback or
   capture capability, and therefore also doesn't have a reset.
   At least one reset is still required, because a controller with
   no playback and no capture is not very useful

Changes in v3:
 driver:
 - alphabetically sort includes
 - check pm_runtime_get_sync return value, act on it
 - remove unnecessary initialisers in set_fmt
 - use udelay(15) in retry code: 10 retries * 15 = 150, so at worst
   we wait the full i2s register access delay
 - fix some weird returns to return directly
 - use __maybe_unused instead of #ifdef CONFIG_PM_SLEEP, also put
   __maybe_unused on the runtime callbacks
 - use (foo) instead of foo in header macros for precedence reasons
 - when using mclk-calibrate, also turn off/on those clocks during
   suspend and resume operations
 - remove mclk_tx and mclk_rx reenablement code in remove
 - move hclk enablement further down the probe, and disable it
   on probe failure
 - make reset controls mandatory, since the bindings state this too
 - use _exclusive for getting the reset controls
 - change reset assert/deassert delays to both be 10 usec
   (thank you Sugar Zhang!)
 - properly prepare and enable all mclks in probe, especially before
   calling clk_get_rate on them
 - if registering PCM fails, also use the cleanup error path instead of
   returning directly
 - bring back playback and capture only but in the way Sugar Zhang
   suggested it: set those modes depending on dma-names
 - rework clock enablement in general. Probe now always enables these,
   instead of relying on the pm resume thing
 - add myself to MAINTAINERS for this driver
 dt bindings:
 - fix a description still mentioning clk-trcm in the schema
 - document rockchip,io-multiplex, a property that describes the
   hardware as having multiplexed I2S GPIOs so direction needs to
   be changed dynamically
 - document rockchip,mclk-calibrate, which allows specifying
   different clocks for the two sample rate bases and switch between
   them as needed
 - dma-names now doesn't have a set order and items can be absent to
   indicate that the controller doesn't support this mode
 - add myself to MAINTAINERS for these bindings

Changes in v2:
 - remove ad-hoc writeq and needless (and broken) optimisation in
   reset assert/deassert. This wouldn't have worked on Big Endian,
   and would've been pointless on any other platform, as the
   overhead for saving one write was comparatively big
 - fix various checkpatch issues
 - get rid of leftover clk-trcm in schema
 - set status = "okay" in example in schema instead of "disabled"
 - change dma-names so rx is first, adjust device trees as necessary
 - properly reference uint32-array for rx-route and tx-route
   instead of uint32
 - replace trcm-sync with two boolean properties, adjust DT changes
   accordingly and also get rid of the header file
 - get rid of rockchip,no-dmaengine. This was only needed for
   some downstream driver and shouldn't be in the DT
 - get rid of rockchip,capture-only/playback-only. Rationale being
   that I have no way to test whether they're needed, and
   unconditionally setting channels_min to 0 breaks everything
 - change hclk description in "clocks"

Nicolas Frattaroli (4):
  ASoC: rockchip: add support for i2s-tdm controller
  ASoC: dt-bindings: rockchip: add i2s-tdm bindings
  arm64: dts: rockchip: add i2s1 on rk356x
  arm64: dts: rockchip: add analog audio on Quartz64

 .../bindings/sound/rockchip,i2s-tdm.yaml      |  198 ++
 MAINTAINERS                                   |    7 +
 .../boot/dts/rockchip/rk3566-quartz64-a.dts   |   31 +-
 arch/arm64/boot/dts/rockchip/rk356x.dtsi      |   26 +
 sound/soc/rockchip/Kconfig                    |   11 +
 sound/soc/rockchip/Makefile                   |    2 +
 sound/soc/rockchip/rockchip_i2s_tdm.c         | 1848 +++++++++++++++++
 sound/soc/rockchip/rockchip_i2s_tdm.h         |  398 ++++
 8 files changed, 2520 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/sound/rockchip,i2s-tdm.yaml
 create mode 100644 sound/soc/rockchip/rockchip_i2s_tdm.c
 create mode 100644 sound/soc/rockchip/rockchip_i2s_tdm.h

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2.33.0