ASoC: dapm: Recalculate audio map forcely when card instantiated

Audio map are possible in wrong state before card->instantiated has been set to true. Imaging the following examples:

time 1: at the beginning

in:-1 in:-1 in:-1 in:-1
out:-1 out:-1 out:-1 out:-1
SIGGEN A B Spk

time 2: after someone called snd_soc_dapm_new_widgets() (e.g. create_fill_widget_route_map() in sound/soc/codecs/hdac_hdmi.c)

in:1 in:0 in:0 in:0
out:0 out:0 out:0 out:1
SIGGEN A B Spk

time 3: routes added

in:1 in:0 in:0 in:0
out:0 out:0 out:0 out:1
SIGGEN -----> A -----> B ---> Spk

In the end, the path should be powered on but it did not. At time 3, "in" of SIGGEN and "out" of Spk did not propagate to their neighbors because snd_soc_dapm_add_path() will not invalidate the paths if the card has not instantiated (i.e. card->instantiated is false). To correct the state of audio map, recalculate the whole map forcely.

---
 sound/soc/soc-core.c | 1 +
 1 file changed, 1 insertion(+)

index 6ddcf12bc030..b29d0f65611e 100644
@@ -2131,6 +2131,7 @@ static int snd_soc_instantiate_card(struct snd_soc_card *card)
 	}
 
 	card->instantiated = 1;
+	dapm_mark_endpoints_dirty(card);
 	snd_soc_dapm_sync(&card->dapm);
 	mutex_unlock(&card->mutex);
 	mutex_unlock(&client_mutex);

2.19.1.930.g4563a0d9d0-goog

The patch

ASoC: dapm: Recalculate audio map forcely when card instantiated

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: Tzung-Bi Shih <[email protected]>
Date: Wed, 14 Nov 2018 17:06:13 +0800
Subject: [PATCH] ASoC: dapm: Recalculate audio map forcely when card
instantiated

Audio map are possible in wrong state before card->instantiated has been set to true. Imaging the following examples:

time 1: at the beginning

in:-1 in:-1 in:-1 in:-1
out:-1 out:-1 out:-1 out:-1
SIGGEN A B Spk

time 2: after someone called snd_soc_dapm_new_widgets() (e.g. create_fill_widget_route_map() in sound/soc/codecs/hdac_hdmi.c)

in:1 in:0 in:0 in:0
out:0 out:0 out:0 out:1
SIGGEN A B Spk

time 3: routes added

in:1 in:0 in:0 in:0
out:0 out:0 out:0 out:1
SIGGEN -----> A -----> B ---> Spk

In the end, the path should be powered on but it did not. At time 3, "in" of SIGGEN and "out" of Spk did not propagate to their neighbors because snd_soc_dapm_add_path() will not invalidate the paths if the card has not instantiated (i.e. card->instantiated is false). To correct the state of audio map, recalculate the whole map forcely.

---
 sound/soc/soc-core.c | 1 +
 1 file changed, 1 insertion(+)

index 6ddcf12bc030..b29d0f65611e 100644
@@ -2131,6 +2131,7 @@ static int snd_soc_instantiate_card(struct snd_soc_card *card)
 	}
 
 	card->instantiated = 1;
+	dapm_mark_endpoints_dirty(card);
 	snd_soc_dapm_sync(&card->dapm);
 	mutex_unlock(&card->mutex);
 	mutex_unlock(&client_mutex);

2.19.1