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Groups > linux.kernel > #1247314

[PATCH v6 09/10] snd: dmaengine-pcm: add snd_dmaengine_pcm_get_caps interface

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Add snd_dmaengine_pcm_get_caps for I2S devices to query
dma controller's caps if they need it to make special limitation
due to specific dma controller design

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>

---

Changes in v6:
- remove get quirks and add get slave caps

Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
Changes in v1: None

 sound/soc/soc-generic-dmaengine-pcm.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index 6fd1906..225c933 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -466,4 +466,28 @@ void snd_dmaengine_pcm_unregister(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_unregister);
 
+
+/**
+ * snd_dmaengine_pcm_get_caps - Get slave dma caps based PCM device
+ * @dev: Parent device the PCM was register with
+ */
+int snd_dmaengine_pcm_get_caps(struct device *dev, struct dma_slave_caps *caps)
+{
+	struct snd_soc_platform *platform;
+	struct dmaengine_pcm *pcm;
+	int ret = -ENODEV;
+
+	platform = snd_soc_lookup_platform(dev);
+	if (!platform)
+		return ret;
+
+	pcm = soc_platform_to_pcm(platform);
+
+	if (pcm->chan)
+		ret = dma_get_slave_caps(pcm->chan[0], caps);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_get_caps);
+
 MODULE_LICENSE("GPL");
-- 
2.3.7


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[PATCH v6 0/10] Fix broken DMAFLUSHP on Rockchips platform Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
  [PATCH v6 04/10] ARM: dts: Add arm,pl330-broken-no-flushp quirk for rk3288 platform Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
  [PATCH v6 01/10] DMA: pl330: support burst mode for dev-to-mem and mem-to-dev transmit Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
    Re: [PATCH v6 01/10] DMA: pl330: support burst mode for dev-to-mem  and mem-to-dev transmit Vinod Koul <vinod.koul@intel.com> - 2015-10-15 06:10 +0200
      Re: [PATCH v6 01/10] DMA: pl330: support burst mode for dev-to-mem  and mem-to-dev transmit Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 09:00 +0200
  [PATCH v6 02/10] Documentation: arm-pl330: add description of arm,pl330-broken-no-flushp Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
  [PATCH v6 05/10] ARM: dts: Add arm,pl330-broken-no-flushp quirk for rk3xxx platform Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
  [PATCH v6 10/10] ASoC: rockchip_i2s: modify DMA max burst to 1 Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
    Re: [PATCH v6 10/10] ASoC: rockchip_i2s: modify DMA max burst to  1 Lars-Peter Clausen <lars@metafoo.de> - 2015-10-15 11:00 +0200
      Re: [PATCH v6 10/10] ASoC: rockchip_i2s: modify DMA max burst to 1 Jianqun Xu <jay.xu@rock-chips.com> - 2015-10-15 12:50 +0200
  [PATCH v6 07/10] DMA: pl330: add max burst for dmaengine Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
  [PATCH v6 03/10] DMA: pl330: add quirk for broken no flushp Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
  [PATCH v6 06/10] DMA: dmaengine: expose max burst capability to clients Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 03:40 +0200
  [PATCH v6 08/10] spi: rockchip: modify DMA max burst to 1 Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 04:00 +0200
  [PATCH v6 09/10] snd: dmaengine-pcm: add snd_dmaengine_pcm_get_caps interface Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 04:00 +0200
    Re: [alsa-devel] [PATCH v6 09/10] snd: dmaengine-pcm: add  snd_dmaengine_pcm_get_caps interface kbuild test robot <lkp@intel.com> - 2015-10-15 05:10 +0200
    Re: [PATCH v6 09/10] snd: dmaengine-pcm: add  snd_dmaengine_pcm_get_caps interface Vinod Koul <vinod.koul@intel.com> - 2015-10-15 06:10 +0200
      Re: [PATCH v6 09/10] snd: dmaengine-pcm: add  snd_dmaengine_pcm_get_caps interface Shawn Lin <shawn.lin@rock-chips.com> - 2015-10-15 09:00 +0200

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