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author | Takashi Iwai <tiwai@suse.de> | 2012-07-19 08:03:20 +0200 |
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committer | Takashi Iwai <tiwai@suse.de> | 2012-07-19 08:03:20 +0200 |
commit | 4609ed6b1f0ab9f11a9d0361573b53d9d057c440 (patch) | |
tree | 802119cc6ddea286bc03d56431286ac52166352e /sound/soc/soc-dmaengine-pcm.c | |
parent | ALSA: hda - make sure alc268 does not OOPS on codec parse (diff) | |
parent | ASoC imx-audmux: add MX31_AUDMUX_PORT7_SSI_PINS_7 define (diff) | |
download | linux-dev-4609ed6b1f0ab9f11a9d0361573b53d9d057c440.tar.xz linux-dev-4609ed6b1f0ab9f11a9d0361573b53d9d057c440.zip |
Merge tag 'asoc-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next
ASoC: Updates for 3.6
This has been a pretty quiet release - very little activity in framework
terms, mostly just a few new drivers and updates:
- Added the ability to add and remove DAPM paths dynamically, mostly for
reparenting on clock changes.
- New machine drivers for Marvell Brownstone, ST-Ericsson Ux500
reference platform and ttc-dkp.
- New CPU drivers for Blackfin BF6xx SPORTs in I2S mode, Marvell MMP,
Synopsis Designware I2S controllers, and SPEAr DMA and S/PDIF
- New CODEC drivers for Dialog DA732x, ST STA529, ST-Ericsson AB8500, TI
Isabelle and Wolfson Microelectronics WM5102 and WM5110
Diffstat (limited to 'sound/soc/soc-dmaengine-pcm.c')
-rw-r--r-- | sound/soc/soc-dmaengine-pcm.c | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/sound/soc/soc-dmaengine-pcm.c b/sound/soc/soc-dmaengine-pcm.c index 475695234b3d..5df529eda251 100644 --- a/sound/soc/soc-dmaengine-pcm.c +++ b/sound/soc/soc-dmaengine-pcm.c @@ -30,6 +30,7 @@ struct dmaengine_pcm_runtime_data { struct dma_chan *dma_chan; + dma_cookie_t cookie; unsigned int pos; @@ -153,7 +154,7 @@ static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream) desc->callback = dmaengine_pcm_dma_complete; desc->callback_param = substream; - dmaengine_submit(desc); + prtd->cookie = dmaengine_submit(desc); return 0; } @@ -200,6 +201,20 @@ int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_trigger); /** + * snd_dmaengine_pcm_pointer_no_residue - dmaengine based PCM pointer implementation + * @substream: PCM substream + * + * This function is deprecated and should not be used by new drivers, as its + * results may be unreliable. + */ +snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream *substream) +{ + struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); + return bytes_to_frames(substream->runtime, prtd->pos); +} +EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer_no_residue); + +/** * snd_dmaengine_pcm_pointer - dmaengine based PCM pointer implementation * @substream: PCM substream * @@ -209,7 +224,19 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_trigger); snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream) { struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); - return bytes_to_frames(substream->runtime, prtd->pos); + struct dma_tx_state state; + enum dma_status status; + unsigned int buf_size; + unsigned int pos = 0; + + status = dmaengine_tx_status(prtd->dma_chan, prtd->cookie, &state); + if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) { + buf_size = snd_pcm_lib_buffer_bytes(substream); + if (state.residue > 0 && state.residue <= buf_size) + pos = buf_size - state.residue; + } + + return bytes_to_frames(substream->runtime, pos); } EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer); @@ -243,7 +270,7 @@ static int dmaengine_pcm_request_channel(struct dmaengine_pcm_runtime_data *prtd * Note that this function will use private_data field of the substream's * runtime. So it is not availabe to your pcm driver implementation. If you need * to keep additional data attached to a substream use - * snd_dmaeinge_pcm_{set,get}_data. + * snd_dmaengine_pcm_{set,get}_data. */ int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, dma_filter_fn filter_fn, void *filter_data) |