From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vinod Subject: Re: [PATCH v2 1/5] ALSA: soc-compress: add support to snd_compr_set_runtime_buffer() Date: Fri, 5 Oct 2018 06:01:12 +0530 Message-ID: <20181005003112.GG2372@vkoul-mobl> References: <20180926102349.23481-1-srinivas.kandagatla@linaro.org> <20180926102349.23481-2-srinivas.kandagatla@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20180926102349.23481-2-srinivas.kandagatla@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: Srinivas Kandagatla Cc: broonie@kernel.org, alsa-devel@alsa-project.org, robh+dt@kernel.org, linux-kernel@vger.kernel.org, bgoswami@codeaurora.org, rohitkr@codeaurora.org, lgirdwood@gmail.com, tiwai@suse.com, devicetree@vger.kernel.org, mark.rutland@arm.com List-Id: devicetree@vger.kernel.org On 26-09-18, 11:23, Srinivas Kandagatla wrote: > This patch adds support to set runtime dma buffer on compressed stream. The change is fine as is, but I feel we need to document the motivation in the changelog. The core changes need a bit more explanation on why we should add this.. > > Signed-off-by: Srinivas Kandagatla > --- > include/sound/compress_driver.h | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/include/sound/compress_driver.h b/include/sound/compress_driver.h > index ea8c93bbb0e0..0cdc3999ecfa 100644 > --- a/include/sound/compress_driver.h > +++ b/include/sound/compress_driver.h > @@ -23,6 +23,7 @@ struct snd_compr_ops; > * struct snd_compr_runtime: runtime stream description > * @state: stream state > * @ops: pointer to DSP callbacks > + * @dma_buffer_p: runtime dma buffer pointer > * @buffer: pointer to kernel buffer, valid only when not in mmap mode or > * DSP doesn't implement copy > * @buffer_size: size of the above buffer > @@ -37,6 +38,7 @@ struct snd_compr_ops; > struct snd_compr_runtime { > snd_pcm_state_t state; > struct snd_compr_ops *ops; > + struct snd_dma_buffer *dma_buffer_p; > void *buffer; > u64 buffer_size; > u32 fragment_size; > @@ -175,6 +177,23 @@ static inline void snd_compr_drain_notify(struct snd_compr_stream *stream) > wake_up(&stream->runtime->sleep); > } > > +/** > + * snd_compr_set_runtime_buffer - Set the Compress runtime buffer > + * @substream: compress substream to set > + * @bufp: the buffer information, NULL to clear > + * > + * Copy the buffer information to runtime buffer when @bufp is non-NULL. > + * Otherwise it clears the current buffer information. > + */ > +static inline void snd_compr_set_runtime_buffer( > + struct snd_compr_stream *substream, > + struct snd_dma_buffer *bufp) > +{ > + struct snd_compr_runtime *runtime = substream->runtime; > + > + runtime->dma_buffer_p = bufp; > +} > + > int snd_compr_stop_error(struct snd_compr_stream *stream, > snd_pcm_state_t state); > > -- > 2.19.0 -- ~Vinod