diff options
Diffstat (limited to 'target/arm/bcm28xx/patches/3.18.9/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch')
| -rw-r--r-- | target/arm/bcm28xx/patches/3.18.9/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/target/arm/bcm28xx/patches/3.18.9/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch b/target/arm/bcm28xx/patches/3.18.9/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch new file mode 100644 index 000000000..a476a7825 --- /dev/null +++ b/target/arm/bcm28xx/patches/3.18.9/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch @@ -0,0 +1,37 @@ +diff -Nur linux-3.18.6.orig/sound/soc/bcm/bcm2708-i2s.c linux-3.18.6/sound/soc/bcm/bcm2708-i2s.c +--- linux-3.18.6.orig/sound/soc/bcm/bcm2708-i2s.c 2015-02-12 12:00:42.809186343 +0100 ++++ linux-3.18.6/sound/soc/bcm/bcm2708-i2s.c 2015-02-12 13:35:35.929213859 +0100 +@@ -171,6 +171,11 @@ + /* I2S pin configuration */ + static int bcm2708_i2s_gpio=BCM2708_I2S_GPIO_AUTO; + ++static bool use_mmap = 1; ++module_param(use_mmap, bool, S_IRUGO); ++MODULE_PARM_DESC(use_mmap, "Use MMAP"); ++ ++ + /* General device struct */ + struct bcm2708_i2s_dev { + struct device *dev; +@@ -874,7 +879,7 @@ + .name = "bcm2708-i2s-comp", + }; + +-static const struct snd_pcm_hardware bcm2708_pcm_hardware = { ++static struct snd_pcm_hardware bcm2708_pcm_hardware = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_JOINT_DUPLEX, + .formats = SNDRV_PCM_FMTBIT_S16_LE | +@@ -966,6 +971,12 @@ + return ret; + } + ++ if (use_mmap) { ++ printk("Enable ALSA MMAP support for I2S\n"); ++ bcm2708_pcm_hardware.info |= SNDRV_PCM_INFO_MMAP; ++ bcm2708_pcm_hardware.info |= SNDRV_PCM_INFO_MMAP_VALID; ++ } ++ + ret = snd_dmaengine_pcm_register(&pdev->dev, + &bcm2708_dmaengine_pcm_config, + SND_DMAENGINE_PCM_FLAG_COMPAT); |