[alsa-devel] [PATCH v2 0/7] ASoC: Intel: Skylake: Add a clk driver to enable ssp clks early

[Vinod Koul]

On Mon, Sep 18, 2017 at 10:26:43AM +0530, Subhransu S. Prusty wrote:
> For certain platforms clocks (mclk/sclk/fs) are required to be up before
> the stream start.  Example: some codecs needs the mclk/sclk/fs to  be
> enabled early for a successful clock synchronization. Some patforms
> require clock to be enabled at boot and be always ON
> 
> By sending set_dma_control IPC (with the i2s blobs queried from NHLT),
> these clocks can be enabled early after the firmware is downloaded.
> 
> With this series, a virtual clock driver is created which provides
> interface to send the required IPCs from machine driver to enable the
> clocks. NHLT is parsed during probe and the clock information is populated.
> The pointer to blob is cached and sent along with the set_dma_control IPC
> structure during the clk prepare/unprepare callback. Clocks are created for
> a ssp if the nhlt table has endpoint configuration for that particular ssp.
> Skylake driver creates a platform driver with the clock information and
> register the clk ops callback.
> 
> kabylake machine driver uses the clock interface to enable the clocks early
> as it is required by the rt5663 driver for clock synchronization.
> 
> set_dma_control API can be used with different payload configuration.
> Modify the arguments to take configurable parameters.

All:
Acked-By: Vinod Koul <vinod.koul at intel.com>


> 
> v1 -> v2
> 	- Register parent clocks with skylake device.
> 	  With the patch "clk: Add support for runtime PM" soon to be merged
> 	  will help DSP to stay active on call to clock enable.
> 	  Reference: (https://patchwork.kernel.org/patch/9911741/)
> 
> 	- Fix the machine driver to enable clocks early for headphone
> 	  playback path as well to fix a pop noise issue
> 
> 	- Include the eve machine driver changes as well
> 
> Harsha Priya (1):
>   ASoC: Intel: kbl: Enable mclk and ssp sclk early
> 
> Jaikrishna Nemallapudi (5):
>   ASoC: Intel: Skylake: Modify skl_dsp_set_dma_control API arguments
>   ASoC: Intel: Skylake: Parse nhlt to populate clock information
>   ASoC: Intel: Skylake: Prepare DMA control IPC to enable/disable clock
>   ASoC: Intel: Skylake: Register clock device and ops
>   ASoC: Intel: Skylake: Add ssp clock driver
> 
> Naveen M (1):
>   ASoC: Intel: eve: Enable mclk and ssp sclk early
> 
>  sound/soc/intel/Kconfig                            |   9 +
>  sound/soc/intel/boards/kbl_rt5663_max98927.c       |  98 ++++++-
>  .../soc/intel/boards/kbl_rt5663_rt5514_max98927.c  |  97 +++++++
>  sound/soc/intel/skylake/Makefile                   |   5 +
>  sound/soc/intel/skylake/skl-i2s.h                  |  56 ++++
>  sound/soc/intel/skylake/skl-messages.c             | 109 +++++++-
>  sound/soc/intel/skylake/skl-nhlt.c                 | 148 +++++++++++
>  sound/soc/intel/skylake/skl-ssp-clk.c              | 288 +++++++++++++++++++++
>  sound/soc/intel/skylake/skl-ssp-clk.h              | 124 +++++++++
>  sound/soc/intel/skylake/skl-topology.h             |   4 +-
>  sound/soc/intel/skylake/skl.c                      | 235 +++++++++++++++++
>  sound/soc/intel/skylake/skl.h                      |  12 +
>  12 files changed, 1173 insertions(+), 12 deletions(-)
>  create mode 100644 sound/soc/intel/skylake/skl-i2s.h
>  create mode 100644 sound/soc/intel/skylake/skl-ssp-clk.c
>  create mode 100644 sound/soc/intel/skylake/skl-ssp-clk.h
> 
> -- 
> 1.9.1
> 

-- 
~Vinod