ASoC: qcom: apq8016: add wrdma support

This patch adds wrdma support in lpass-apq8016 by providing the register
offsets and adding support in dma channel allocation callback.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Kenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 19 insertions, 3 deletions

diff --git a/sound/soc/qcom/lpass-apq8016.c b/sound/soc/qcom/lpass-apq8016.c
index ca3bbd58c81a..3eef0c37ba50 100644
--- a/sound/soc/qcom/lpass-apq8016.c
+++ b/sound/soc/qcom/lpass-apq8016.c
@@ -137,11 +137,23 @@ static int apq8016_lpass_alloc_dma_channel(struct lpass_data *drvdata,
                                            int direction)
 {
         struct lpass_variant *v = drvdata->variant;
-        int chan = find_first_zero_bit(&drvdata->dma_ch_bit_map,
+        int chan = 0;
+
+        if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+                chan = find_first_zero_bit(&drvdata->dma_ch_bit_map,
                                         v->rdma_channels);
 
-        if (chan >= v->rdma_channels)
-                return -EBUSY;
+                if (chan >= v->rdma_channels)
+                        return -EBUSY;
+        } else {
+                chan = find_next_zero_bit(&drvdata->dma_ch_bit_map,
+                                        v->wrdma_channel_start +
+                                        v->wrdma_channels,
+                                        v->wrdma_channel_start);
+
+                if (chan >=  v->wrdma_channel_start + v->wrdma_channels)
+                        return -EBUSY;
+        }
 
         set_bit(chan, &drvdata->dma_ch_bit_map);
 
@@ -214,6 +226,10 @@ static struct lpass_variant apq8016_data = {
         .rdma_reg_stride        = 0x1000,
         .rdma_channels          = 2,
         .dmactl_audif_start     = 1,
+        .wrdma_reg_base         = 0xB000,
+        .wrdma_reg_stride       = 0x1000,
+        .wrdma_channel_start    = 5,
+        .wrdma_channels         = 2,
         .dai_driver             = apq8016_lpass_cpu_dai_driver,
         .num_dai                = ARRAY_SIZE(apq8016_lpass_cpu_dai_driver),
         .init                   = apq8016_lpass_init,