-----Original Message----- From: Greg KH gregkh@linuxfoundation.org Sent: Friday, July 24, 2020 4:32 PM To: Bard Liao yung-chuan.liao@linux.intel.com Cc: alsa-devel@alsa-project.org; vkoul@kernel.org; vinod.koul@linaro.org; linux-kernel@vger.kernel.org; tiwai@suse.de; broonie@kernel.org; jank@cadence.com; srinivas.kandagatla@linaro.org; rander.wang@linux.intel.com; ranjani.sridharan@linux.intel.com; hui.wang@canonical.com; pierre-louis.bossart@linux.intel.com; Kale, Sanyog R sanyog.r.kale@intel.com; Lin, Mengdong mengdong.lin@intel.com; Liao, Bard bard.liao@intel.com Subject: Re: [PATCH] soundwire: master: enable pm runtime
On Thu, Jul 23, 2020 at 09:49:02PM +0800, Bard Liao wrote:
We should enable pm runtime.
Because why?
The hierarchy of soundwire devices is platform device -> M device -> S device. A S device is physically attached on the platform device. So the platform device should be resumed when a S device is resumed. As the bridge of platform device and S device, we have to implement runtime pm on M driver. We have set runtime pm ops in M driver already, but still need to enable runtime pm.
Please read the documentation about how to write good changelog comments...
Sure. I will update the changelog in next version. Thanks for the advice.
greg k-h