From 04ff40a983e864b586f189b4c3503b6f61263643 Mon Sep 17 00:00:00 2001 From: Richard Fitzgerald Date: Mon, 5 Feb 2018 11:38:17 +0000 Subject: ASoC: wm_adsp: Don't init cache from DSP memory if control is write-only For controls marked write-only don't initialize the cache from the content of the DSP memory. We stil need the cache for any new data that is written to this control, and we need to return something for a read of the ALSA control because most user-side code assumes all ALSA controls are readable. The cache is already created zero- filled so the only change needed is to skip populating it from DSP memory if the control isn't readable. Signed-off-by: Richard Fitzgerald Signed-off-by: Mark Brown --- sound/soc/codecs/wm_adsp.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'sound') diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index 66e32f5..0060aeb 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -1237,9 +1237,16 @@ static int wm_coeff_init_control_caches(struct wm_adsp *dsp) if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) continue; - ret = wm_coeff_read_control(ctl, ctl->cache, ctl->len); - if (ret < 0) - return ret; + /* + * For readable controls populate the cache from the DSP memory. + * For non-readable controls the cache was zero-filled when + * created so we don't need to do anything. + */ + if (!ctl->flags || (ctl->flags & WMFW_CTL_FLAG_READABLE)) { + ret = wm_coeff_read_control(ctl, ctl->cache, ctl->len); + if (ret < 0) + return ret; + } } return 0; -- cgit v1.1