diff --git a/bcm2835-audio-Fix-draining-behavior-regression.patch b/bcm2835-audio-Fix-draining-behavior-regression.patch new file mode 100644 index 000000000..6d63db3f8 --- /dev/null +++ b/bcm2835-audio-Fix-draining-behavior-regression.patch @@ -0,0 +1,64 @@ +From 2eed19b99c8e95ff87afe6c140ed895c3fac5937 Mon Sep 17 00:00:00 2001 +From: Takashi Iwai +Date: Sat, 14 Sep 2019 17:24:05 +0200 +Subject: staging: bcm2835-audio: Fix draining behavior regression + +The PCM draining behavior got broken since the recent refactoring, and +this turned out to be the incorrect expectation of the firmware +behavior regarding "draining". While I expected the "drain" flag at +the stop operation would do processing the queued samples, it seems +rather dropping the samples. + +As a quick fix, just drop the SNDRV_PCM_INFO_DRAIN_TRIGGER flag, so +that the driver uses the normal PCM draining procedure. Also, put +some caution comment to the function for future readers not to fall +into the same pitfall. + +Fixes: d7ca3a71545b ("staging: bcm2835-audio: Operate non-atomic PCM ops") +BugLink: https://github.com/raspberrypi/linux/issues/2983 +Cc: stable@vger.kernel.org +Signed-off-by: Takashi Iwai +Acked-by: Stefan Wahren +Link: https://lore.kernel.org/r/20190914152405.7416-1-tiwai@suse.de +Signed-off-by: Greg Kroah-Hartman +--- + drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c | 4 ++-- + drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c | 1 + + 2 files changed, 3 insertions(+), 2 deletions(-) + +diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c +index bc1eaa3a0773..826016c3431a 100644 +--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c ++++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c +@@ -12,7 +12,7 @@ + static const struct snd_pcm_hardware snd_bcm2835_playback_hw = { + .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | +- SNDRV_PCM_INFO_DRAIN_TRIGGER | SNDRV_PCM_INFO_SYNC_APPLPTR), ++ SNDRV_PCM_INFO_SYNC_APPLPTR), + .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, + .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, + .rate_min = 8000, +@@ -29,7 +29,7 @@ static const struct snd_pcm_hardware snd_bcm2835_playback_hw = { + static const struct snd_pcm_hardware snd_bcm2835_playback_spdif_hw = { + .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | +- SNDRV_PCM_INFO_DRAIN_TRIGGER | SNDRV_PCM_INFO_SYNC_APPLPTR), ++ SNDRV_PCM_INFO_SYNC_APPLPTR), + .formats = SNDRV_PCM_FMTBIT_S16_LE, + .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000, +diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c +index 23fba01107b9..c6f9cf1913d2 100644 +--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c ++++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c +@@ -289,6 +289,7 @@ int bcm2835_audio_stop(struct bcm2835_alsa_stream *alsa_stream) + VC_AUDIO_MSG_TYPE_STOP, false); + } + ++/* FIXME: this doesn't seem working as expected for "draining" */ + int bcm2835_audio_drain(struct bcm2835_alsa_stream *alsa_stream) + { + struct vc_audio_msg m = { +-- +cgit 1.2-0.3.lf.el7 diff --git a/kernel.spec b/kernel.spec index 2ebebdff4..f94ed88f0 100644 --- a/kernel.spec +++ b/kernel.spec @@ -559,6 +559,8 @@ Patch307: arm64-dts-rockchip-fix-RockPro64-vdd-log-regulator-settings.patch # https://patchwork.kernel.org/patch/11155461/ Patch308: arm64-dts-rockchip-fix-Rockpro64-RK808-interrupt-line.patch +Patch309: bcm2835-audio-Fix-draining-behavior-regression.patch + # Tegra bits Patch320: arm64-tegra-jetson-tx1-fixes.patch # https://www.spinics.net/lists/linux-tegra/msg43110.html