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Subject[PATCH 3.11 071/208] ASoC: wm_adsp: Add small delay while polling DSP RAM start
Date
3.11.10.3 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>

commit 939fd1e8d9deff206f12bd9d4e54aa7a4bd0ffd6 upstream.

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>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
sound/soc/codecs/wm_adsp.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index d1c59b6..bea3844 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -1495,13 +1495,17 @@ 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");
--
1.8.3.2


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