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Sat, 22 Feb 2020 22:45:34 -0500 (EST) From: Samuel Holland To: Mark Brown , Liam Girdwood , Jaroslav Kysela , Takashi Iwai , Jonathan Corbet , Jerome Brunet Subject: [PATCH v3 2/3] ASoC: pcm: Export parameter intersection logic Date: Sat, 22 Feb 2020 21:45:32 -0600 Message-Id: <20200223034533.1035-3-samuel@sholland.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200223034533.1035-1-samuel@sholland.org> References: <20200223034533.1035-1-samuel@sholland.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: Ondrej Jirman , alsa-devel@alsa-project.org, Samuel Holland , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 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: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" The logic to calculate the subset of stream parameters supported by all DAIs associated with a PCM stream is nontrivial. Export a helper function so it can be used to set up simple codec2codec DAI links. Signed-off-by: Samuel Holland --- include/sound/soc.h | 3 +++ sound/soc/soc-pcm.c | 55 ++++++++++++++++++++++++++++++++------------- 2 files changed, 42 insertions(+), 16 deletions(-) diff --git a/include/sound/soc.h b/include/sound/soc.h index f0e4f36f83bf..8724928d02c5 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -471,6 +471,9 @@ bool snd_soc_runtime_ignore_pmdown_time(struct snd_soc_pcm_runtime *rtd); void snd_soc_runtime_activate(struct snd_soc_pcm_runtime *rtd, int stream); void snd_soc_runtime_deactivate(struct snd_soc_pcm_runtime *rtd, int stream); +int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, + struct snd_pcm_hardware *hw, int stream); + int snd_soc_runtime_set_dai_fmt(struct snd_soc_pcm_runtime *rtd, unsigned int dai_fmt); diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index ff1b7c7078e5..6680d31eece3 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -402,11 +402,18 @@ static void soc_pcm_apply_msb(struct snd_pcm_substream *substream) soc_pcm_set_msb(substream, cpu_bits); } -static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) +/** + * snd_soc_runtime_calc_hw() - Calculate hw limits for a PCM stream + * @rtd: ASoC PCM runtime + * @hw: PCM hardware parameters (output) + * @stream: Direction of the PCM stream + * + * Calculates the subset of stream parameters supported by all DAIs + * associated with the PCM stream. + */ +int snd_soc_runtime_calc_hw(struct snd_soc_pcm_runtime *rtd, + struct snd_pcm_hardware *hw, int stream) { - struct snd_pcm_runtime *runtime = substream->runtime; - struct snd_pcm_hardware *hw = &runtime->hw; - struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *codec_dai; struct snd_soc_dai_driver *cpu_dai_drv = rtd->cpu_dai->driver; struct snd_soc_dai_driver *codec_dai_drv; @@ -418,7 +425,7 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) u64 formats = ULLONG_MAX; int i; - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + if (stream == SNDRV_PCM_STREAM_PLAYBACK) cpu_stream = &cpu_dai_drv->playback; else cpu_stream = &cpu_dai_drv->capture; @@ -431,16 +438,12 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) * Otherwise, since the rate, channel, and format values will * zero in that case, we would have no usable settings left, * causing the resulting setup to fail. - * At least one CODEC should match, otherwise we should have - * bailed out on a higher level, since there would be no - * CODEC to support the transfer direction in that case. */ - if (!snd_soc_dai_stream_valid(codec_dai, - substream->stream)) + if (!snd_soc_dai_stream_valid(codec_dai, stream)) continue; codec_dai_drv = codec_dai->driver; - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + if (stream == SNDRV_PCM_STREAM_PLAYBACK) codec_stream = &codec_dai_drv->playback; else codec_stream = &codec_dai_drv->capture; @@ -452,6 +455,9 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) rates = snd_pcm_rate_mask_intersect(codec_stream->rates, rates); } + if (!chan_min) + return -EINVAL; + /* * chan min/max cannot be enforced if there are multiple CODEC DAIs * connected to a single CPU DAI, use CPU DAI's directly and let @@ -464,18 +470,35 @@ static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) hw->channels_min = max(chan_min, cpu_stream->channels_min); hw->channels_max = min(chan_max, cpu_stream->channels_max); - if (hw->formats) - hw->formats &= formats & cpu_stream->formats; - else - hw->formats = formats & cpu_stream->formats; + hw->formats = formats & cpu_stream->formats; hw->rates = snd_pcm_rate_mask_intersect(rates, cpu_stream->rates); - snd_pcm_limit_hw_rates(runtime); + snd_pcm_hw_limit_rates(hw); hw->rate_min = max(hw->rate_min, cpu_stream->rate_min); hw->rate_min = max(hw->rate_min, rate_min); hw->rate_max = min_not_zero(hw->rate_max, cpu_stream->rate_max); hw->rate_max = min_not_zero(hw->rate_max, rate_max); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_runtime_calc_hw); + +static void soc_pcm_init_runtime_hw(struct snd_pcm_substream *substream) +{ + struct snd_pcm_hardware *hw = &substream->runtime->hw; + struct snd_soc_pcm_runtime *rtd = substream->private_data; + u64 formats = hw->formats; + + /* + * At least one CODEC should match, otherwise we should have + * bailed out on a higher level, since there would be no + * CODEC to support the transfer direction in that case. + */ + snd_soc_runtime_calc_hw(rtd, hw, substream->stream); + + if (formats) + hw->formats &= formats; } static int soc_pcm_components_open(struct snd_pcm_substream *substream, -- 2.24.1