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authorCharles Keepax <ckeepax@opensource.wolfsonmicro.com>2013-12-18 09:25:49 +0000
committerMark Brown <broonie@linaro.org>2013-12-18 11:22:25 +0000
commit939fd1e8d9deff206f12bd9d4e54aa7a4bd0ffd6 (patch)
tree8e8386e69e9a108bbdc2dda91229b2ef86f2d9c4
parent6ce4eac1f600b34f2f7f58f9cd8f0503d79e42ae (diff)
downloadlinux-939fd1e8d9deff206f12bd9d4e54aa7a4bd0ffd6.tar.gz
ASoC: wm_adsp: Add small delay while polling DSP RAM start
Some devices are getting very close to the limit whilst polling the RAM start, this patch adds a small delay to this loop to give a longer startup timeout. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@linaro.org> Cc: stable@vger.kernel.org
-rw-r--r--sound/soc/codecs/wm_adsp.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 46ec0e9744d4..4fbcab63e61f 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -1474,13 +1474,17 @@ static int wm_adsp2_ena(struct wm_adsp *dsp)
return ret;
/* Wait for the RAM to start, should be near instantaneous */
- count = 0;
- do {
+ for (count = 0; count < 10; ++count) {
ret = regmap_read(dsp->regmap, dsp->base + ADSP2_STATUS1,
&val);
if (ret != 0)
return ret;
- } while (!(val & ADSP2_RAM_RDY) && ++count < 10);
+
+ if (val & ADSP2_RAM_RDY)
+ break;
+
+ msleep(1);
+ }
if (!(val & ADSP2_RAM_RDY)) {
adsp_err(dsp, "Failed to start DSP RAM\n");