[PATCH v2] ASoC: hdmi-codec: Get ELD in before reporting plugged event

[PATCH v2] ASoC: hdmi-codec: Get ELD in before reporting plugged event

[Cheng-Yi Chiang]

In plugged callback, ELD should be updated from display driver so that
user space can query information from ELD immediately after receiving jack
plugged event.

When jack is unplugged, clear ELD buffer so that user space does not get
obsolete information of unplugged HDMI.

Signed-off-by: Cheng-Yi Chiang <cychiang@chromium.org>
---
Change from v1 to v2:
 - Report jack unplug event then clear ELD. This makes sure user will not get a
   cleared ELD during their usage of jack.

 sound/soc/codecs/hdmi-codec.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 403d4c6a49a8..e8410b2433de 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -692,10 +692,16 @@ static void plugged_cb(struct device *dev, bool plugged)
 {
 	struct hdmi_codec_priv *hcp = dev_get_drvdata(dev);
 
-	if (plugged)
+	if (plugged) {
+		if (hcp->hcd.ops->get_eld) {
+			hcp->hcd.ops->get_eld(dev->parent, hcp->hcd.data,
+					    hcp->eld, sizeof(hcp->eld));
+		}
 		hdmi_codec_jack_report(hcp, SND_JACK_LINEOUT);
-	else
+	} else {
 		hdmi_codec_jack_report(hcp, 0);
+		memset(hcp->eld, 0, sizeof(hcp->eld));
+	}
 }
 
 static int hdmi_codec_set_jack(struct snd_soc_component *component,
-- 
2.29.2.299.gdc1121823c-goog

Re: [PATCH v2] ASoC: hdmi-codec: Get ELD in before reporting plugged event

[Mark Brown]

On Wed, 18 Nov 2020 12:38:52 +0800, Cheng-Yi Chiang wrote:
> In plugged callback, ELD should be updated from display driver so that
> user space can query information from ELD immediately after receiving jack
> plugged event.
> 
> When jack is unplugged, clear ELD buffer so that user space does not get
> obsolete information of unplugged HDMI.

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: hdmi-codec: Get ELD in before reporting plugged event
      commit: 25ce4f2b3593fa6bba70ddabbd2ee297b262784f

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