Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
IronPort-SDR: pGO0QxEHO++XhncwKABAbzj2dL3KQTdlccKpjZMpnUPRKTLypaBdo14WIutJxmFo6ipZ3nJmkj
 Q5Ztd4UzkwMQ==
IronPort-SDR: +41t/VS2hSWWaxdGLnWlVJ1+O3XYm7q28Gwb7SqZ22y47R7HThh6ts1dka0oIUXikUWt38SVzs
 2JGHGtx5eT8A==
From:   Bard Liao <yung-chuan.liao@linux.intel.com>
To:     alsa-devel@alsa-project.org, vkoul@kernel.org
Cc:     vinod.koul@linaro.org, linux-kernel@vger.kernel.org, tiwai@suse.de,
        broonie@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com,
        srinivas.kandagatla@linaro.org, rander.wang@linux.intel.com,
        ranjani.sridharan@linux.intel.com, hui.wang@canonical.com,
        pierre-louis.bossart@linux.intel.com, sanyog.r.kale@intel.com,
        mengdong.lin@intel.com, bard.liao@intel.com
Subject: [PATCH v2 4/4] soundwire: intel: remove stream handling from .prepare and .hw_free
Date:   Fri,  4 Sep 2020 04:47:39 +0800
Message-Id: <20200903204739.31206-5-yung-chuan.liao@linux.intel.com>
In-Reply-To: <20200903204739.31206-1-yung-chuan.liao@linux.intel.com>
References: <20200903204739.31206-1-yung-chuan.liao@linux.intel.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Now that the stream is handled at the dai-link level (in the machine
driver), we can remove the stream handling at the dai level. We still
need these callbacks to perform dai-level resource handling
(i.e. addition/removal of a master).

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
---
 drivers/soundwire/intel.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index d208c49b157a..a254f271acf2 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -967,7 +967,7 @@ static int intel_prepare(struct snd_pcm_substream *substream,
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
 	struct sdw_cdns_dma_data *dma;
 	int ch, dir;
-	int ret;
+	int ret = 0;
 
 	dma = snd_soc_dai_get_dma_data(dai, substream);
 	if (!dma) {
@@ -1003,13 +1003,8 @@ static int intel_prepare(struct snd_pcm_substream *substream,
 					  dma->hw_params,
 					  sdw->instance,
 					  dma->pdi->intel_alh_id);
-		if (ret)
-			goto err;
 	}
 
-	ret = sdw_prepare_stream(dma->stream);
-
-err:
 	return ret;
 }
 
@@ -1025,12 +1020,12 @@ intel_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 	if (!dma)
 		return -EIO;
 
-	ret = sdw_deprepare_stream(dma->stream);
-	if (ret) {
-		dev_err(dai->dev, "sdw_deprepare_stream: failed %d", ret);
-		return ret;
-	}
-
+	/*
+	 * The sdw stream state will transition to RELEASED when stream->
+	 * master_list is empty. So the stream state will transition to
+	 * DEPREPARED for the first cpu-dai and to RELEASED for the last
+	 * cpu-dai.
+	 */
 	ret = sdw_stream_remove_master(&cdns->bus, dma->stream);
 	if (ret < 0) {
 		dev_err(dai->dev, "remove master from stream %s failed: %d\n",
-- 
2.17.1