The patch
ASoC: codec: hdac_hdmi add device_link to card device
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 01c8327667c249818d3712c3e25c7ad2aca7f389 Mon Sep 17 00:00:00 2001
From: Libin Yang libin.yang@intel.com Date: Sat, 13 Apr 2019 21:18:12 +0800 Subject: [PATCH] ASoC: codec: hdac_hdmi add device_link to card device
In resume from S3, HDAC HDMI codec driver dapm event callback may be operated before HDMI codec driver turns on the display audio power domain because of the contest between display driver and hdmi codec driver.
This patch adds the device_link between soc card device (consumer) and hdmi codec device (supplier) to make sure the sequence is always correct.
Signed-off-by: Libin Yang libin.yang@intel.com Reviewed-by: Takashi Iwai tiwai@suse.de Acked-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org --- sound/soc/codecs/hdac_hdmi.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/sound/soc/codecs/hdac_hdmi.c b/sound/soc/codecs/hdac_hdmi.c index 5eeb0fe836a9..4de1fbfa8827 100644 --- a/sound/soc/codecs/hdac_hdmi.c +++ b/sound/soc/codecs/hdac_hdmi.c @@ -1854,6 +1854,17 @@ static int hdmi_codec_probe(struct snd_soc_component *component) /* Imp: Store the card pointer in hda_codec */ hdmi->card = dapm->card->snd_card;
+ /* + * Setup a device_link between card device and HDMI codec device. + * The card device is the consumer and the HDMI codec device is + * the supplier. With this setting, we can make sure that the audio + * domain in display power will be always turned on before operating + * on the HDMI audio codec registers. + * Let's use the flag DL_FLAG_AUTOREMOVE_CONSUMER. This can make + * sure the device link is freed when the machine driver is removed. + */ + device_link_add(component->card->dev, &hdev->dev, DL_FLAG_RPM_ACTIVE | + DL_FLAG_AUTOREMOVE_CONSUMER); /* * hdac_device core already sets the state to active and calls * get_noresume. So enable runtime and set the device to suspend.