ASoC: soc-cache: Allow codec->cache_bypass to be used with snd_soc_hw_bulk_write_raw()

If we specifically want to write a block of data to the hw bypassing the
cache, then allow this to happen inside snd_soc_hw_bulk_write_raw().

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index a217db256700..687beec56476 100644
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -404,12 +404,13 @@ static int snd_soc_hw_bulk_write_raw(struct snd_soc_codec *codec, unsigned int r
 {
         int ret;
 
-        /* Ensure that the base register is volatile.  Subsequently
-         * any other register that is touched by this routine should be
-         * volatile as well to ensure that we don't get out of sync with
-         * the cache.
+        /* To ensure that we don't get out of sync with the cache, check
+         * whether the base register is volatile or if we've directly asked
+         * to bypass the cache.  Out of bounds registers are considered
+         * volatile.
          */
-        if (!snd_soc_codec_volatile_register(codec, reg)
+        if (!codec->cache_bypass
+            && !snd_soc_codec_volatile_register(codec, reg)
             && reg < codec->driver->reg_cache_size)
                 return -EINVAL;