diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0380-staging-bcm2835-audio-Fix-incorrect-draining-handlin.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0380-staging-bcm2835-audio-Fix-incorrect-draining-handlin.patch | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0380-staging-bcm2835-audio-Fix-incorrect-draining-handlin.patch b/target/linux/bcm27xx/patches-4.19/950-0380-staging-bcm2835-audio-Fix-incorrect-draining-handlin.patch new file mode 100644 index 0000000000..fe308694d7 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0380-staging-bcm2835-audio-Fix-incorrect-draining-handlin.patch @@ -0,0 +1,69 @@ +From e5414b543a330c64b2e0b5e96d604cf580c2b9b7 Mon Sep 17 00:00:00 2001 +From: Takashi Iwai <tiwai@suse.de> +Date: Tue, 4 Sep 2018 17:58:38 +0200 +Subject: [PATCH] staging: bcm2835-audio: Fix incorrect draining + handling + +commit 7d2a91f5f1bcf08ca257bcf1ed9721fcd341f834 upstream. + +The handling of SNDRV_PCM_TRIGGER_STOP at the trigger callback is +incorrect: when the STOP is issued, the driver is supposed to drop the +stream immediately. Meanwhile bcm2835 driver checks the DRAINING +state and tries to issue some different command. + +This patch straightens things a bit, dropping the incorrect state +checks. The draining behavior would be still not perfect at this +point, but will be improved in a later patch. + +Signed-off-by: Takashi Iwai <tiwai@suse.de> +Tested-by: Stefan Wahren <stefan.wahren@i2se.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + .../vc04_services/bcm2835-audio/bcm2835-pcm.c | 18 ++++++------------ + 1 file changed, 6 insertions(+), 12 deletions(-) + +--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c ++++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c +@@ -153,7 +153,6 @@ static int snd_bcm2835_playback_open_gen + chip->alsa_stream[idx] = alsa_stream; + + chip->opened |= (1 << idx); +- alsa_stream->draining = 1; + + out: + mutex_unlock(&chip->audio_mutex); +@@ -268,6 +267,7 @@ static int snd_bcm2835_pcm_prepare(struc + alsa_stream->buffer_size = snd_pcm_lib_buffer_bytes(substream); + alsa_stream->period_size = snd_pcm_lib_period_bytes(substream); + alsa_stream->pos = 0; ++ alsa_stream->draining = false; + + audio_debug("buffer_size=%d, period_size=%d pos=%d frame_bits=%d\n", + alsa_stream->buffer_size, alsa_stream->period_size, +@@ -312,21 +312,15 @@ static int snd_bcm2835_pcm_trigger(struc + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + err = bcm2835_audio_start(alsa_stream); +- if (!err) +- alsa_stream->draining = 1; +- else ++ if (err) + audio_error(" Failed to START alsa device (%d)\n", err); + break; ++ case SNDRV_PCM_TRIGGER_DRAIN: ++ alsa_stream->draining = true; ++ break; + case SNDRV_PCM_TRIGGER_STOP: +- if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { +- audio_info("DRAINING\n"); +- alsa_stream->draining = 1; +- } else { +- audio_info("DROPPING\n"); +- alsa_stream->draining = 0; +- } + err = bcm2835_audio_stop(alsa_stream); +- if (err != 0) ++ if (err) + audio_error(" Failed to STOP alsa device (%d)\n", err); + break; + default: |