The patch ASoC: wm_adsp: Don't init cache from DSP memory if control is write-only
has been applied to the asoc tree at https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >From 04ff40a983e864b586f189b4c3503b6f61263643 Mon Sep 17 00:00:00 2001 From: Richard Fitzgerald <r...@opensource.cirrus.com> Date: Mon, 5 Feb 2018 11:38:17 +0000 Subject: [PATCH] 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 <r...@opensource.cirrus.com> Signed-off-by: Mark Brown <broo...@kernel.org> --- sound/soc/codecs/wm_adsp.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index 66e32f5d2917..0060aeb63a9f 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; -- 2.16.1
