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authorSylwester Nawrocki <s.nawrocki@samsung.com>2020-07-31 20:38:34 +0300
committerMark Brown <broonie@kernel.org>2020-08-17 14:28:56 +0300
commitf082bb59b72039a2326ec1a44496899fb8aa6d0e (patch)
treebdbb3cce2cf7ac284d66c0f293cfaf4646f1ee3b /sound
parentff69c97ef84c9f7795adb49e9f07c9adcdd0c288 (diff)
downloadlinux-f082bb59b72039a2326ec1a44496899fb8aa6d0e.tar.xz
ASoC: wm8994: Avoid attempts to read unreadable registers
The driver supports WM1811, WM8994, WM8958 devices but according to documentation and the regmap definitions the WM8958_DSP2_* registers are only available on WM8958. In current code these registers are being accessed as if they were available on all the three chips. When starting playback on WM1811 CODEC multiple errors like: "wm8994-codec wm8994-codec: ASoC: error at soc_component_read_no_lock on wm8994-codec: -5" can be seen, which is caused by attempts to read an unavailable WM8958_DSP2_PROGRAM register. The issue has been uncovered by recent commit "e2329ee ASoC: soc-component: add soc_component_err()". This patch adds a check in wm8958_aif_ev() callback so the DSP2 handling is only done for WM8958. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://lore.kernel.org/r/20200731173834.23832-1-s.nawrocki@samsung.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/wm8958-dsp2.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8958-dsp2.c b/sound/soc/codecs/wm8958-dsp2.c
index 68a3b48e6b31..3bce9a14f0f3 100644
--- a/sound/soc/codecs/wm8958-dsp2.c
+++ b/sound/soc/codecs/wm8958-dsp2.c
@@ -412,8 +412,12 @@ int wm8958_aif_ev(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+ struct wm8994 *control = dev_get_drvdata(component->dev->parent);
int i;
+ if (control->type != WM8958)
+ return 0;
+
switch (event) {
case SND_SOC_DAPM_POST_PMU:
case SND_SOC_DAPM_PRE_PMU: