diff options
Diffstat (limited to 'target/arm/raspberry-pi/patches/3.12.33/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch')
| -rw-r--r-- | target/arm/raspberry-pi/patches/3.12.33/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/target/arm/raspberry-pi/patches/3.12.33/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch b/target/arm/raspberry-pi/patches/3.12.33/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch new file mode 100644 index 000000000..a8af27d9f --- /dev/null +++ b/target/arm/raspberry-pi/patches/3.12.33/0002-enable-MMAP-by-default-allow-overide-via-use_mmap.patch @@ -0,0 +1,53 @@ +From f1290350dc2cc8defb2d613a32f1a7bd4400de65 Mon Sep 17 00:00:00 2001 +From: Waldemar Brodkorb <wbrodkorb@conet.de> +Date: Fri, 28 Nov 2014 16:18:36 +0100 +Subject: [PATCH 2/2] enable MMAP by default, allow overide via use_mmap + +Add a bool module parameter to control availability of MMAP +in the driver. + +Signed-off-by: Waldemar Brodkorb <wbx@openadk.org> +--- + sound/soc/bcm/bcm2708-i2s.c | 12 +++++++++++- + 1 file changed, 11 insertions(+), 1 deletion(-) + +diff --git a/sound/soc/bcm/bcm2708-i2s.c b/sound/soc/bcm/bcm2708-i2s.c +index 3fcb740..ddf9796 100644 +--- a/sound/soc/bcm/bcm2708-i2s.c ++++ b/sound/soc/bcm/bcm2708-i2s.c +@@ -171,6 +171,11 @@ static const unsigned int bcm2708_clk_freq[BCM2708_CLK_SRC_HDMI+1] = { + /* 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; +@@ -870,7 +875,7 @@ static const struct snd_soc_component_driver bcm2708_i2s_component = { + .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 | +@@ -962,6 +967,11 @@ static int bcm2708_i2s_probe(struct platform_device *pdev) + return ret; + } + ++ if (use_mmap) { ++ 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); +-- +1.7.10.4 + |