ASoC: Intel: Skylake: Fix default dma_buffer_size

If the dma_buffer_size is not defined in topology, fix it to 2ms default
value to make backward compatible.

Fixes: f6e6ab1d16ec ("ASoC: Intel: Skylake: Fix dma buffer size calculation")
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/sound/soc/intel/skylake/skl-messages.c b/sound/soc/intel/skylake/skl-messages.c
index eca85827dbd2..fb2f1f603f3c 100644
--- a/sound/soc/intel/skylake/skl-messages.c
+++ b/sound/soc/intel/skylake/skl-messages.c
@@ -540,6 +540,14 @@ static void skl_setup_cpr_gateway_cfg(struct skl_sst *ctx,
         cpr_mconfig->gtw_cfg.dma_buffer_size =
                                 mconfig->dma_buffer_size * dma_io_buf;
 
+        /* fallback to 2ms default value */
+        if (!cpr_mconfig->gtw_cfg.dma_buffer_size) {
+                if (mconfig->hw_conn_type == SKL_CONN_SOURCE)
+                        cpr_mconfig->gtw_cfg.dma_buffer_size = 2 * mconfig->obs;
+                else
+                        cpr_mconfig->gtw_cfg.dma_buffer_size = 2 * mconfig->ibs;
+        }
+
         cpr_mconfig->cpr_feature_mask = 0;
         cpr_mconfig->gtw_cfg.config_length  = 0;