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Commit 72383192 authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Mark Brown
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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: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 6ff33f39

sound/soc/davinci/davinci-mcasp.c

+3 −4
Original line number Diff line number Diff line
@@ -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)