From patchwork Mon Apr 16 15:23:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinod Koul X-Patchwork-Id: 10343223 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 282416039A for ; Mon, 16 Apr 2018 15:20:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1070828798 for ; Mon, 16 Apr 2018 15:20:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0EA82287E6; Mon, 16 Apr 2018 15:20:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2EDEA28798 for ; Mon, 16 Apr 2018 15:20:29 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 8F772267635; Mon, 16 Apr 2018 17:19:37 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id ABDAB267628; Mon, 16 Apr 2018 17:19:32 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by alsa0.perex.cz (Postfix) with ESMTP id 5A24B267616 for ; Mon, 16 Apr 2018 17:19:30 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Apr 2018 08:19:30 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.48,459,1517904000"; d="scan'208";a="33012248" Received: from vkoul-udesk7.iind.intel.com ([10.223.84.143]) by fmsmga008.fm.intel.com with ESMTP; 16 Apr 2018 08:19:27 -0700 From: Vinod Koul To: Greg KH Date: Mon, 16 Apr 2018 20:53:35 +0530 Message-Id: <1523892221-16169-8-git-send-email-vinod.koul@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1523892221-16169-1-git-send-email-vinod.koul@intel.com> References: <1523892221-16169-1-git-send-email-vinod.koul@intel.com> Cc: ALSA , tiwai@suse.de, Pierre-Louis Bossart , liam.r.girdwood@linux.intel.com, patches.audio@intel.com, broonie@kernel.org, Sanyog Kale , Vinod Koul Subject: [alsa-devel] [PATCH v3 07/13] soundwire: Add stream configuration APIs X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP From: Sanyog Kale Add APIs for prepare, enable, disable and de-prepare stream. Signed-off-by: Sanyog Kale Signed-off-by: Shreyas NC Signed-off-by: Vinod Koul --- drivers/soundwire/bus.c | 9 ++ drivers/soundwire/stream.c | 252 ++++++++++++++++++++++++++++++++++++++++++ include/linux/soundwire/sdw.h | 4 + 3 files changed, 265 insertions(+) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 084bf71b2b87..dcc0ff9f0c22 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -17,6 +17,7 @@ */ int sdw_add_bus_master(struct sdw_bus *bus) { + struct sdw_master_prop *prop = NULL; int ret; if (!bus->dev) { @@ -79,9 +80,17 @@ int sdw_add_bus_master(struct sdw_bus *bus) } /* + * Initialize clock values based on Master properties. The max + * frequency is read from max_freq property. Current assumption + * is that the bus will start at highest clock frequency when + * powered on. + * * Default active bank will be 0 as out of reset the Slaves have * to start with bank 0 (Table 40 of Spec) */ + prop = &bus->prop; + bus->params.max_dr_freq = prop->max_freq * SDW_DOUBLE_RATE_FACTOR; + bus->params.curr_dr_freq = bus->params.max_dr_freq; bus->params.curr_bank = SDW_BANK0; bus->params.next_bank = SDW_BANK1; diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index 17890ac7973b..5c0779077e8f 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -1217,3 +1217,255 @@ struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave, return NULL; } + +static int _sdw_prepare_stream(struct sdw_stream_runtime *stream) +{ + struct sdw_master_runtime *m_rt = stream->m_rt; + struct sdw_bus *bus = m_rt->bus; + struct sdw_master_prop *prop = NULL; + struct sdw_bus_params params; + int ret; + + prop = &bus->prop; + memcpy(¶ms, &bus->params, sizeof(params)); + + /* TODO: Support Asynchronous mode */ + if ((prop->max_freq % stream->params.rate) != 0) { + dev_err(bus->dev, "Async mode not supported"); + return -EINVAL; + } + + /* Increment cumulative bus bandwidth */ + bus->params.bandwidth += m_rt->stream->params.rate * + m_rt->ch_count * m_rt->stream->params.bps; + + /* Program params */ + ret = sdw_program_params(bus); + if (ret < 0) { + dev_err(bus->dev, "Program params failed: %d", ret); + goto restore_params; + } + + ret = do_bank_switch(stream); + if (ret < 0) { + dev_err(bus->dev, "Bank switch failed: %d", ret); + goto restore_params; + } + + /* Prepare port(s) on the new clock configuration */ + ret = sdw_prep_deprep_ports(m_rt, true); + if (ret < 0) { + dev_err(bus->dev, "Prepare port(s) failed ret = %d", + ret); + return ret; + } + + stream->state = SDW_STREAM_PREPARED; + + return ret; + +restore_params: + memcpy(&bus->params, ¶ms, sizeof(params)); + return ret; +} + +/** + * sdw_prepare_stream: Prepare SoundWire stream + * + * @stream: Soundwire stream + * + * Documentation/soundwire/stream.txt explains this API in detail + */ +int sdw_prepare_stream(struct sdw_stream_runtime *stream) +{ + int ret = 0; + + if (!stream) { + pr_err("SoundWire: Handle not found for stream"); + return -EINVAL; + } + + mutex_lock(&stream->m_rt->bus->bus_lock); + + ret = _sdw_prepare_stream(stream); + if (ret < 0) + pr_err("Prepare for stream:%s failed: %d", stream->name, ret); + + mutex_unlock(&stream->m_rt->bus->bus_lock); + return ret; +} +EXPORT_SYMBOL(sdw_prepare_stream); + +static int _sdw_enable_stream(struct sdw_stream_runtime *stream) +{ + struct sdw_master_runtime *m_rt = stream->m_rt; + struct sdw_bus *bus = m_rt->bus; + int ret; + + /* Program params */ + ret = sdw_program_params(bus); + if (ret < 0) { + dev_err(bus->dev, "Program params failed: %d", ret); + return ret; + } + + /* Enable port(s) */ + ret = sdw_enable_disable_ports(m_rt, true); + if (ret < 0) { + dev_err(bus->dev, "Enable port(s) failed ret: %d", ret); + return ret; + } + + ret = do_bank_switch(stream); + if (ret < 0) { + dev_err(bus->dev, "Bank switch failed: %d", ret); + return ret; + } + + stream->state = SDW_STREAM_ENABLED; + return 0; +} + +/** + * sdw_enable_stream: Enable SoundWire stream + * + * @stream: Soundwire stream + * + * Documentation/soundwire/stream.txt explains this API in detail + */ +int sdw_enable_stream(struct sdw_stream_runtime *stream) +{ + int ret = 0; + + if (!stream) { + pr_err("SoundWire: Handle not found for stream"); + return -EINVAL; + } + + mutex_lock(&stream->m_rt->bus->bus_lock); + + ret = _sdw_enable_stream(stream); + if (ret < 0) + pr_err("Enable for stream:%s failed: %d", stream->name, ret); + + mutex_unlock(&stream->m_rt->bus->bus_lock); + return ret; +} +EXPORT_SYMBOL(sdw_enable_stream); + +static int _sdw_disable_stream(struct sdw_stream_runtime *stream) +{ + struct sdw_master_runtime *m_rt = stream->m_rt; + struct sdw_bus *bus = m_rt->bus; + int ret; + + /* Disable port(s) */ + ret = sdw_enable_disable_ports(m_rt, false); + if (ret < 0) { + dev_err(bus->dev, "Disable port(s) failed: %d", ret); + return ret; + } + + stream->state = SDW_STREAM_DISABLED; + + /* 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); +} + +/** + * sdw_disable_stream: Disable SoundWire stream + * + * @stream: Soundwire stream + * + * Documentation/soundwire/stream.txt explains this API in detail + */ +int sdw_disable_stream(struct sdw_stream_runtime *stream) +{ + int ret = 0; + + if (!stream) { + pr_err("SoundWire: Handle not found for stream"); + return -EINVAL; + } + + mutex_lock(&stream->m_rt->bus->bus_lock); + + ret = _sdw_disable_stream(stream); + if (ret < 0) + pr_err("Disable for stream:%s failed: %d", stream->name, ret); + + mutex_unlock(&stream->m_rt->bus->bus_lock); + return ret; +} +EXPORT_SYMBOL(sdw_disable_stream); + +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; + } + + bus->params.bandwidth -= m_rt->stream->params.rate * + m_rt->ch_count * m_rt->stream->params.bps; + + if (!bus->params.bandwidth) { + bus->params.row = 0; + bus->params.col = 0; + goto exit; + + } + + /* 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); + +exit: + stream->state = SDW_STREAM_DEPREPARED; + + return ret; +} + +/** + * sdw_deprepare_stream: Deprepare SoundWire stream + * + * @stream: Soundwire stream + * + * Documentation/soundwire/stream.txt explains this API in detail + */ +int sdw_deprepare_stream(struct sdw_stream_runtime *stream) +{ + int ret = 0; + + if (!stream) { + pr_err("SoundWire: Handle not found for stream"); + return -EINVAL; + } + + mutex_lock(&stream->m_rt->bus->bus_lock); + + ret = _sdw_deprepare_stream(stream); + if (ret < 0) + pr_err("De-prepare for stream:%d failed: %d", ret, ret); + + mutex_unlock(&stream->m_rt->bus->bus_lock); + return ret; +} +EXPORT_SYMBOL(sdw_deprepare_stream); diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index ff4b0134897e..7cebb7da1a8c 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -791,6 +791,10 @@ int sdw_stream_remove_master(struct sdw_bus *bus, struct sdw_stream_runtime *stream); int sdw_stream_remove_slave(struct sdw_slave *slave, struct sdw_stream_runtime *stream); +int sdw_prepare_stream(struct sdw_stream_runtime *stream); +int sdw_enable_stream(struct sdw_stream_runtime *stream); +int sdw_disable_stream(struct sdw_stream_runtime *stream); +int sdw_deprepare_stream(struct sdw_stream_runtime *stream); /* messaging and data APIs */