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>

diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index add6bb99661daced09d250eb04af15b37c6ffb44..1260b315a96c5a50b02c0b643655821c7f04e949 100644 (file)
--- 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)