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

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 46ec0e9744d4b88b50cc922cfdc65a0b4247e567..4fbcab63e61f1c5d8b4843fdec5c6d3dbfa498ed 100644 (file)
--- 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");