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* ASoC: dmaengine_pcm: set MODULE_LICENSELothar Waßmann2012-11-231-0/+2
| | | | | Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* dmaengine: Add flags parameter to dmaengine_prep_dma_cyclic()Peter Ujfalusi2012-09-241-1/+5
| | | | | | | | | | | | | | With this parameter added to dmaengine_prep_dma_cyclic() the API will be in sync with other dmaengine_prep_*() functions. The dmaengine_prep_dma_cyclic() function primarily used by audio for cyclic transfer required by ALSA, we use the from audio to ask dma drivers to suppress interrupts (if DMA_PREP_INTERRUPT is cleared) when it is supported on the platform. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> CC: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Vinod Koul <vinod.koul@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
* ASoC: dmaengine_pcm: fix typo in commentUwe Kleine-König2012-06-251-1/+1
| | | | | Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* ASoC: dmaengine-pcm: Add support for querying stream position from DMA driverLars-Peter Clausen2012-06-201-1/+28
| | | | | | | | | | | | | | | | | | | Currently the sound dmaengine pcm helper functions implement the pcm_pointer callback by trying to count the number of elapsed periods. This is done by advancing the stream position in the dmaengine callback by one period. Unfortunately there is no guarantee that the callback will be called for each elapsed period. It may be possible that under high system load it is only called once for multiple elapsed periods. This patch addresses the issue by implementing support for querying the current stream position directly from the dmaengine driver. Since not all dmaengine drivers support reporting the stream position yet the old period counting implementation is kept for now. Furthermore the new mechanism allows to report the stream position with a sub-period granularity, given that the dmaengine driver supports this. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* ASoC: dmaengine-pcm: Rename and deprecate snd_dmaengine_pcm_pointerLars-Peter Clausen2012-06-201-5/+5
| | | | | | | | | | | | | | | | | | | Currently the sound dmaengine pcm helper functions implement the pcm_pointer callback by trying to count the number of elapsed periods. This is done by advancing the stream position in the dmaengine callback by one period. Unfortunately there is no guarantee that the callback will be called for each elapsed period. It may be possible that under high system load it is only called once for multiple elapsed periods. This patch renames the current implementation and documents its shortcomings and that it should not be used anymore in new drivers. The next patch will introduce a new snd_dmaengine_pcm_pointer which will be implemented based on querying the current stream position from the dma device. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by Vinod Koul <vinod.koul@linux.intel.com> Acked-by: Dong Aisheng <dong.aisheng@linaro.org Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* ASoC: dmaengine_pcm: use dmaengine cyclic wrapperVinod Koul2012-03-261-2/+2
| | | | | | | | | | commit 4a163c82 added extra parameter to device_prep_dma_cyclic this is not required if we use the wrapper over cyclic API. This is split from Alexedre's patch Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* ASoC: Add extra parameter to device_prep_dma_cyclicFabio Estevam2012-03-221-1/+1
| | | | | | | | | | | | Since commit 185ecb5 (dmaengine: add context parameter to prep_slave_sg and prep_dma_cyclic) prep_dma_cyclic() got an extra context parameter. Add this new parameter in order to fix the following build error (mxs_defconfig and imx_v4_v5_defconfig): sound/soc/soc-dmaengine-pcm.c:149:3: error: too few arguments to function 'chan->device->device_prep_dma_cyclic' Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* ASoC: dmaengine_pcm: Reset pointer position when starting a streamMika Westerberg2012-03-121-0/+1
| | | | | | | | | Otherwise a wrong position will be reported after restarting a stream and the first few samples might be skipped. Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* ASoC: Add dmaengine PCM helper functionsLars-Peter Clausen2012-03-021-0/+287
This patch adds a set of functions which are intended to be used when implementing a dmaengine based sound PCM driver. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Tested-by: Shawn Guo <shawn.guo@linaro.org> Acked-by: Vinod Koul <vinod.koul@linux.intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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