On Wed, Apr 25, 2018 at 03:09:17PM +0530, Vinod Koul wrote:
> From: Sanyog Kale <sanyog.r.kale@xxxxxxxxx>
>
> Add APIs for prepare, enable, disable and de-prepare stream.
>
> Signed-off-by: Sanyog Kale <sanyog.r.kale@xxxxxxxxx>
> Signed-off-by: Shreyas NC <shreyas.nc@xxxxxxxxx>
> Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
> ---
> drivers/soundwire/bus.c | 9 ++
> drivers/soundwire/stream.c | 246 ++++++++++++++++++++++++++++++++++++++++++
> include/linux/soundwire/sdw.h | 4 +
> 3 files changed, 259 insertions(+)
>
> +
> +static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream)
> +{
> + struct sdw_master_runtime *m_rt = stream->m_rt;
> + struct sdw_bus *bus = m_rt->bus;
> + int ret = 0;
> +
> + /* De-prepare port(s) */
> + ret = sdw_prep_deprep_ports(m_rt, false);
> + if (ret < 0) {
> + dev_err(bus->dev, "De-prepare port(s) failed: %d", ret);
> + return ret;
> + }
> +
> + /* TODO: Update this during Device-Device support */
> + bus->params.bandwidth -= m_rt->stream->params.rate *
> + m_rt->ch_count * m_rt->stream->params.bps;
> +
We should have kept zero bandwidth check here because there is no need
to perform sdw_program_params when no stream is running on bus.
> + /* Program params */
> + ret = sdw_program_params(bus);
> + if (ret < 0) {
> + dev_err(bus->dev, "Program params failed: %d", ret);
> + return ret;
> + }
> +
> + return do_bank_switch(stream);
Change the state to DEPREPARE and then return.
> +
> + stream->state = SDW_STREAM_DEPREPARED;
> +
> + return ret;
> +}
> +
>
> --
> 2.7.4
>
--
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