Hi Srinivas,
On Wed, Aug 09, 2017 at 06:49:25PM +0200, srinivas.kandagatla@linaro.org wrote:
From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
MBHC (MultiButton Headset Control) support is available in pm8921 in two blocks, one to detect mechanical headset insertion and removal and other block to support headset type detection and 5 button detection and othe features like impedance calculation.
This patch adds support to: 1> Support to NC and NO type of headset Jacks. 2> Mechanical insertion and detection of headset jack. 3> Detect a 3 pole Headphone and a 4 pole Headset. 4> Detect 5 buttons.
Tested it on DB410c with Audio Mezz board with 4 pole and 3 pole headset/headphones.
I have the same issue with this patchset, KEY_MEDIA is being reported when unplugging a headset. I added a few traces and what I observe is that the "button pressed" irq is fired when unplugging, but no "button released" irq follows. To get a "button released" irq, I need to either plug a headset, or plug-and-unplug headphones.
So basically, detection fails because we don't get the "button pressed" irq prior to the mechanical switch irq. Do you know what could explain the MBHC not firing the "button released" irq when unplugging headset?
Thanks,