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authorMark Brown <broonie@opensource.wolfsonmicro.com>2013-02-22 19:38:03 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-03-26 16:45:26 +0100
commitdf8c3dbee9e6f19ddb0ae8e05cdf76eb2d3b7f00 (patch)
treea2a434ff045668a9be5f23a36e24a096796a0965 /drivers/extcon
parentASoC: arizona: Fix interaction between headphone outputs and identification (diff)
downloadlinux-df8c3dbee9e6f19ddb0ae8e05cdf76eb2d3b7f00.tar.xz
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extcon: arizona: Fix interaction between headphone outputs and identification
Running HPDET while the headphone outputs are enabled can disrupt the operation of HPDET. In order to avoid this HPDET needs to disable the headphone outputs and ASoC needs to not enable them while HPDET is running. For extcon instead of checking if the headphone output is enabled when doing magic application unconditionally disable the output and restore the state which ASoC wants set when undoing the magic. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/extcon-arizona.c44
1 files changed, 30 insertions, 14 deletions
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 896a923546e0..b28927972128 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -104,29 +104,45 @@ static void arizona_extcon_do_magic(struct arizona_extcon_info *info,
unsigned int magic)
{
struct arizona *arizona = info->arizona;
- unsigned int val;
int ret;
mutex_lock(&arizona->dapm->card->dapm_mutex);
- ret = regmap_read(arizona->regmap, ARIZONA_OUTPUT_ENABLES_1, &val);
- if (ret != 0) {
- dev_err(arizona->dev, "Failed to read output enables: %d\n",
- ret);
- val = 0;
- }
+ arizona->hpdet_magic = magic;
- if (!(val & (ARIZONA_OUT1L_ENA | ARIZONA_OUT1R_ENA))) {
- ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000,
- magic);
+ /* Keep the HP output stages disabled while doing the magic */
+ if (magic) {
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_OUTPUT_ENABLES_1,
+ ARIZONA_OUT1L_ENA |
+ ARIZONA_OUT1R_ENA, 0);
if (ret != 0)
- dev_warn(arizona->dev, "Failed to do magic: %d\n",
+ dev_warn(arizona->dev,
+ "Failed to disable headphone outputs: %d\n",
+ ret);
+ }
+
+ ret = regmap_update_bits(arizona->regmap, 0x225, 0x4000,
+ magic);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to do magic: %d\n",
ret);
- ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000,
- magic);
+ ret = regmap_update_bits(arizona->regmap, 0x226, 0x4000,
+ magic);
+ if (ret != 0)
+ dev_warn(arizona->dev, "Failed to do magic: %d\n",
+ ret);
+
+ /* Restore the desired state while not doing the magic */
+ if (!magic) {
+ ret = regmap_update_bits(arizona->regmap,
+ ARIZONA_OUTPUT_ENABLES_1,
+ ARIZONA_OUT1L_ENA |
+ ARIZONA_OUT1R_ENA, arizona->hp_ena);
if (ret != 0)
- dev_warn(arizona->dev, "Failed to do magic: %d\n",
+ dev_warn(arizona->dev,
+ "Failed to restore headphone outputs: %d\n",
ret);
}