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@xxxxxxxxx> > > 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 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
