* [PATCH] ASoC: davinci-mcasp: Revise the FIFO threshold calculation
@ 2015-09-14 13:06 Peter Ujfalusi
0 siblings, 0 replies; only message in thread
From: Peter Ujfalusi @ 2015-09-14 13:06 UTC (permalink / raw)
To: broonie, lgirdwood; +Cc: alsa-devel, daniel
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>
---
sound/soc/davinci/davinci-mcasp.c | 7 +++----
1 file 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)
--
2.5.2
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2015-09-14 13:06 [PATCH] ASoC: davinci-mcasp: Revise the FIFO threshold calculation Peter Ujfalusi
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