From mboxrd@z Thu Jan 1 00:00:00 1970 From: Liam Girdwood Subject: [PATCH] ASoC: Intel: Fix allow hw_params to be called more than once. Date: Fri, 2 May 2014 16:56:32 +0100 Message-ID: <1399046194-5544-6-git-send-email-liam.r.girdwood@linux.intel.com> References: <1399046194-5544-1-git-send-email-liam.r.girdwood@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by alsa0.perex.cz (Postfix) with ESMTP id A7AAE261740 for ; Fri, 2 May 2014 17:56:57 +0200 (CEST) In-Reply-To: <1399046194-5544-1-git-send-email-liam.r.girdwood@linux.intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: Mark Brown Cc: Takashi Iwai , Liam Girdwood , alsa-devel@alsa-project.org List-Id: alsa-devel@alsa-project.org hw_params() can be called multiple times. Make sure we release the DSP stream that was allocated on previous hw_params() calls before allocating a new DSP stream. Signed-off-by: Liam Girdwood --- sound/soc/intel/sst-haswell-pcm.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/sound/soc/intel/sst-haswell-pcm.c b/sound/soc/intel/sst-haswell-pcm.c index ba585a7..50fea07 100644 --- a/sound/soc/intel/sst-haswell-pcm.c +++ b/sound/soc/intel/sst-haswell-pcm.c @@ -99,6 +99,7 @@ struct hsw_pcm_data { struct snd_compr_stream *cstream; unsigned int wpos; struct mutex mutex; + bool allocated; }; /* private data for the driver */ @@ -113,6 +114,8 @@ struct hsw_priv_data { struct hsw_pcm_data pcm[HSW_PCM_COUNT]; }; +static u32 hsw_notify_pointer(struct sst_hsw_stream *stream, void *data); + static inline u32 hsw_mixer_to_ipc(unsigned int value) { if (value >= ARRAY_SIZE(volume_map)) @@ -322,6 +325,29 @@ static int hsw_pcm_hw_params(struct snd_pcm_substream *substream, u8 channels; int ret; + /* check if we are being called a subsequent time */ + if (pcm_data->allocated) { + ret = sst_hsw_stream_reset(hsw, pcm_data->stream); + if (ret < 0) + dev_dbg(rtd->dev, "error: reset stream failed %d\n", + ret); + + ret = sst_hsw_stream_free(hsw, pcm_data->stream); + if (ret < 0) { + dev_dbg(rtd->dev, "error: free stream failed %d\n", + ret); + return ret; + } + pcm_data->allocated = false; + + pcm_data->stream = sst_hsw_stream_new(hsw, rtd->cpu_dai->id, + hsw_notify_pointer, pcm_data); + if (pcm_data->stream == NULL) { + dev_err(rtd->dev, "error: failed to create stream\n"); + return -EINVAL; + } + } + /* stream direction */ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) path_id = SST_HSW_STREAM_PATH_SSP0_OUT; @@ -475,6 +501,7 @@ static int hsw_pcm_hw_params(struct snd_pcm_substream *substream, dev_err(rtd->dev, "error: failed to commit stream %d\n", ret); return ret; } + pcm_data->allocated = true; ret = sst_hsw_stream_pause(hsw, pcm_data->stream, 1); if (ret < 0) @@ -607,6 +634,7 @@ static int hsw_pcm_close(struct snd_pcm_substream *substream) dev_dbg(rtd->dev, "error: free stream failed %d\n", ret); goto out; } + pcm_data->allocated = 0; pcm_data->stream = NULL; out: -- 1.9.1