ASoC: wm_adsp: Factor out stripping padding from ADSP data

In preparation for more refactoring add a helper function to strip the
padding from ADSP data.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 12ef85e..bd3241a 100644 (file)
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -3231,6 +3231,21 @@ static inline int wm_adsp_buffer_write(struct wm_adsp_compr_buf *buf,
                                       buf->host_buf_ptr + field_offset, data);
 }
 
+static void wm_adsp_remove_padding(u32 *buf, int nwords, int data_word_size)
+{
+       u8 *pack_in = (u8 *)buf;
+       u8 *pack_out = (u8 *)buf;
+       int i, j;
+
+       /* Remove the padding bytes from the data read from the DSP */
+       for (i = 0; i < nwords; i++) {
+               for (j = 0; j < data_word_size; j++)
+                       *pack_out++ = *pack_in++;
+
+               pack_in += sizeof(*buf) - data_word_size;
+       }
+}
+
 static int wm_adsp_legacy_host_buf_addr(struct wm_adsp_compr_buf *buf)
 {
        struct wm_adsp_alg_region *alg_region;
@@ -3666,11 +3681,9 @@ EXPORT_SYMBOL_GPL(wm_adsp_compr_pointer);
 static int wm_adsp_buffer_capture_block(struct wm_adsp_compr *compr, int target)
 {
        struct wm_adsp_compr_buf *buf = compr->buf;
-       u8 *pack_in = (u8 *)compr->raw_buf;
-       u8 *pack_out = (u8 *)compr->raw_buf;
        unsigned int adsp_addr;
        int mem_type, nwords, max_read;
-       int i, j, ret;
+       int i, ret;
 
        /* Calculate read parameters */
        for (i = 0; i < wm_adsp_fw[buf->dsp->fw].caps->num_regions; ++i)
@@ -3702,13 +3715,7 @@ static int wm_adsp_buffer_capture_block(struct wm_adsp_compr *compr, int target)
        if (ret < 0)
                return ret;
 
-       /* Remove the padding bytes from the data read from the DSP */
-       for (i = 0; i < nwords; i++) {
-               for (j = 0; j < WM_ADSP_DATA_WORD_SIZE; j++)
-                       *pack_out++ = *pack_in++;
-
-               pack_in += sizeof(*(compr->raw_buf)) - WM_ADSP_DATA_WORD_SIZE;
-       }
+       wm_adsp_remove_padding(compr->raw_buf, nwords, WM_ADSP_DATA_WORD_SIZE);
 
        /* update read index to account for words read */
        buf->read_index += nwords;