ASoC: davinci-mcasp: Revise the FIFO threshold calculation

The FIFO threshold for McASP should be <=[tx/rx]numevt so the initial value
for the refining should meet this requirement as well.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index add6bb99661d..1260b315a96c 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -663,7 +663,7 @@ static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
         u8 rx_ser = 0;
         u8 slots = mcasp->tdm_slots;
         u8 max_active_serializers = (channels + slots - 1) / slots;
-        int active_serializers, numevt, n;
+        int active_serializers, numevt;
         u32 reg;
         /* Default configuration */
         if (mcasp->version < MCASP_VERSION_3)
@@ -745,9 +745,8 @@ static int mcasp_common_hw_param(struct davinci_mcasp *mcasp, int stream,
          * The number of words for numevt need to be in steps of active
          * serializers.
          */
-        n = numevt % active_serializers;
-        if (n)
-                numevt += (active_serializers - n);
+        numevt = (numevt / active_serializers) * active_serializers;
+
         while (period_words % numevt && numevt > 0)
                 numevt -= active_serializers;
         if (numevt <= 0)