From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: [PATCH AUTOSEL 4.19 031/123] ASoC: Intel: Power down links before turning off display audio power To: Mark Brown , Sasha Levin Cc: stable@vger.kernel.org, linux-kernel@vger.kernel.org, Sriram Periyasamy , Sanyog Kale References: <20181205093555.5386-1-sashal@kernel.org> <20181205093555.5386-31-sashal@kernel.org> <20181205114851.GC6205@sirena.org.uk> From: Pierre-Louis Bossart Message-ID: <475af06c-bae7-13f4-26fc-8d4a9944e25f@linux.intel.com> Date: Wed, 5 Dec 2018 07:34:18 -0800 MIME-Version: 1.0 In-Reply-To: <20181205114851.GC6205@sirena.org.uk> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit List-ID: On 12/5/18 3:48 AM, Mark Brown wrote: > On Wed, Dec 05, 2018 at 04:34:23AM -0500, Sasha Levin wrote: >> From: Pierre-Louis Bossart >> >> [ Upstream commit 4c10473d6ddf12ec124c9ff71a5d23bb5388478b ] >> >> On certain platforms, Display HDMI HDA codec was not going to sleep state >> after the use when links are powered down after turning off the display >> power. As per the HW recommendation, links are powered down before turning >> off the display power to ensure that the codec goes to sleep state. > > Are we sure there's no dependencies here? If you are referring to dependencies to other patches, not that I can think of. Based on timelines there isn't a strong link with 4.19: the patch was initially submitted in August (and missed), before v4.19 came out, and has also been used in 4.14 backports.