clear-pkgs-linux-iot-lts2018/0241-ASoC-Intel-Skylake-Probe-Increase-Injector-DMA-buffe.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Pawse, GuruprasadX" <guruprasadx.pawse@intel.com>
Date: Tue, 12 Jul 2016 10:57:10 +0530
Subject: [PATCH] ASoC: Intel: Skylake: Probe-Increase Injector DMA buffer size

    DMA buffer size needed for 48KHz, 4 channel, 32 bit data scheduled
    at 4ms for 2 probe packets is = 2* [ 24 + (48*4*4*32/8) + 8]  = 6208.
    This is the worst case buffer for current set of usecases.
    Increase the DMA buffer size to this value for now until an optimal
    buffer size value is arrived at.

Change-Id: Iaf7c3229c6217c10c0c6871c358e9df74b552414
Signed-off-by: Pawse, GuruprasadX <guruprasadx.pawse@intel.com>
Reviewed-on:
Reviewed-by: Jayanti, Satya Charitardha <satya.charitardha.jayanti@intel.com>
Tested-by: Jayanti, Satya Charitardha <satya.charitardha.jayanti@intel.com>
---
 sound/soc/intel/skylake/skl-topology.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/soc/intel/skylake/skl-topology.c b/sound/soc/intel/skylake/skl-topology.c
index 49f8404fd381..a27112b6c3dc 100644
--- a/sound/soc/intel/skylake/skl-topology.c
+++ b/sound/soc/intel/skylake/skl-topology.c
@@ -37,6 +37,12 @@
 #define SKL_FMT_FIXUP_MASK		(1 << 2)
 #define SKL_IN_DIR_BIT_MASK		BIT(0)
 #define SKL_PIN_COUNT_MASK		GENMASK(7, 4)
+/*
+ * DMA buffer size needed for 48KHz, 4 channel, 32 bit data
+ * scheduled at 4ms  for 2 probe packets is
+ * 2* [ 24 + (48*4*4*32/8) + 8]  = 6208.
+ */
+#define SKL_INJECT_PROBE_DMA_BUFF_SIZE 6208
 
 static const int mic_mono_list[] = {
 0, 1, 2, 3,
@@ -505,7 +511,7 @@ int skl_tplg_attach_probe_dma(struct snd_soc_dapm_widget *w,
 		ad.node_id.node.vindex = pconfig->iprobe[i].dma_id;
 		ad.node_id.node.dma_type = SKL_DMA_HDA_HOST_OUTPUT_CLASS;
 		ad.node_id.node.rsvd = 0;
-		ad.dma_buff_size = 1536;/* TODO:Configure based on calculation*/
+		ad.dma_buff_size = SKL_INJECT_PROBE_DMA_BUFF_SIZE;
 	}
 
 	ret = skl_set_module_params(ctx, (u32 *)&ad,
-- 
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