6 Dec
2013
6 Dec
'13
3:42 p.m.
On Fri, Dec 06, 2013 at 05:48:23PM +0800, Nicolin Chen wrote:
Therefore, this patch mainly adds jack event detection feature and switchs I/O routes accordingly. Meanwhile, for those monaural input cases, we also turn on the ADC monomix features of WM8962 if needed.
No, the kernel shouldn't be doing any route switching or other configuration - that should be done by userspace. This is a policy decision, there are situations where for example audio should go to both headphones and speaker when headphones are connected in order to make sure notifications are audible even if headpones have been removed.
- if (hp_status != priv->hp_active_low) {
snprintf(buf, 32, "STATE=%d", 2);snd_soc_dapm_disable_pin(&priv->codec->dapm, "Ext Spk");ret = imx_hp_jack_gpio.report;- } else {
snprintf(buf, 32, "STATE=%d", 0);snd_soc_dapm_enable_pin(&priv->codec->dapm, "Ext Spk");ret = 0;- }
- envp[0] = "NAME=headphone";
- envp[1] = buf;
- envp[2] = NULL;
- kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, envp);
What's this uevent trying to do and why is it open coded in the driver?