brcm2708: update to latest patches from RPi foundation

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0380-staging-bcm2835-audio-Fix-incorrect-draining-handlin.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0380-staging-bcm2835-audio-Fix-incorrect-draining-handlin.patch b/target/linux/brcm2708/patches-4.19/950-0380-staging-bcm2835-audio-Fix-incorrect-draining-handlin.patch
new file mode 100644 (file)
index 0000000..fe30869
--- /dev/null
+++ b/target/linux/brcm2708/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: