Hi Mark,
On Mon, Nov 26, 2012 at 09:39:38PM +0000, Mark Brown wrote:
> +static int arizona_haptics_play(struct input_dev *input, void *data,
> + struct ff_effect *effect)
> +{
> + struct arizona_haptics *haptics = input_get_drvdata(input);
> + struct arizona *arizona = haptics->arizona;
> + struct mutex *dapm_mutex = &arizona->dapm->card->dapm_mutex;
> + u8 val;
> + int ret;
> +
> + if (!haptics->arizona->dapm) {
> + dev_err(arizona->dev, "No DAPM context\n");
> + return -EBUSY;
> + }
> +
> + if (effect->u.rumble.strong_magnitude) {
> + /* Scale the magnitude into the range the device supports */
> + if (arizona->pdata.hap_act) {
> + val = effect->u.rumble.strong_magnitude >> 9;
> + if (effect->direction < 0x8000)
> + val += 0x7f;
> + } else {
> + val = effect->u.rumble.strong_magnitude >> 8;
> + }
> +
> + ret = regmap_update_bits(arizona->regmap,
> + ARIZONA_HAPTICS_PHASE_2_INTENSITY,
> + ARIZONA_PHASE2_INTENSITY_MASK, val);
> + if (ret != 0) {
> + dev_err(arizona->dev, "Failed to set intensity: %d\n",
> + ret);
> + return ret;
> + }
> +
> + /* This enable sequence will be a noop if already enabled */
> + ret = regmap_update_bits(arizona->regmap,
> + ARIZONA_HAPTICS_CONTROL_1,
> + ARIZONA_HAP_CTRL_MASK,
> + 1 << ARIZONA_HAP_CTRL_SHIFT);
> + if (ret != 0) {
> + dev_err(arizona->dev, "Failed to start haptics: %d\n",
> + ret);
> + return ret;
> + }
> +
> + mutex_lock_nested(dapm_mutex, SND_SOC_DAPM_CLASS_RUNTIME);
You cannot sleep in play() methods.
Thanks.
--
Dmitry
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