From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinivas Kandagatla Subject: [RFC PATCH 2/6] soundwire: Add compute_params callback Date: Fri, 7 Jun 2019 09:56:39 +0100 Message-ID: <20190607085643.932-3-srinivas.kandagatla@linaro.org> References: <20190607085643.932-1-srinivas.kandagatla@linaro.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190607085643.932-1-srinivas.kandagatla@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: broonie@kernel.org, vkoul@kernel.org Cc: robh+dt@kernel.org, devicetree@vger.kernel.org, mark.rutland@arm.com, pierre-louis.bossart@linux.intel.com, alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org, Srinivas Kandagatla List-Id: devicetree@vger.kernel.org From: Vinod Koul This callback allows masters to compute the bus parameters required. Signed-off-by: Vinod Koul Signed-off-by: Srinivas Kandagatla --- drivers/soundwire/stream.c | 9 +++++++++ include/linux/soundwire/sdw.h | 2 ++ 2 files changed, 11 insertions(+) diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index 73c52cd4fec8..b86992145799 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -1485,6 +1485,15 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream) bus->params.bandwidth += m_rt->stream->params.rate * m_rt->ch_count * m_rt->stream->params.bps; + /* Compute params */ + if (bus->compute_params) { + ret = bus->compute_params(bus); + if (ret < 0) { + dev_err(bus->dev, "Compute params failed: %d", ret); + return ret; + } + } + /* Program params */ ret = sdw_program_params(bus); if (ret < 0) { diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index bea46bd8b6ce..aac68e879fae 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -718,6 +718,7 @@ struct sdw_master_ops { * Bit set implies used number, bit clear implies unused number. * @bus_lock: bus lock * @msg_lock: message lock + * @compute_params: points to Bus resource management implementation * @ops: Master callback ops * @port_ops: Master port callback ops * @params: Current bus parameters @@ -739,6 +740,7 @@ struct sdw_bus { DECLARE_BITMAP(assigned, SDW_MAX_DEVICES); struct mutex bus_lock; struct mutex msg_lock; + int (*compute_params)(struct sdw_bus *bus); const struct sdw_master_ops *ops; const struct sdw_master_port_ops *port_ops; struct sdw_bus_params params; -- 2.21.0