diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0015-bcm2835-i2s-add-24bit-support-update-bclk_ratio-to-m.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0015-bcm2835-i2s-add-24bit-support-update-bclk_ratio-to-m.patch | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0015-bcm2835-i2s-add-24bit-support-update-bclk_ratio-to-m.patch b/target/linux/brcm2708/patches-4.4/0015-bcm2835-i2s-add-24bit-support-update-bclk_ratio-to-m.patch deleted file mode 100644 index df806f4..0000000 --- a/target/linux/brcm2708/patches-4.4/0015-bcm2835-i2s-add-24bit-support-update-bclk_ratio-to-m.patch +++ /dev/null @@ -1,79 +0,0 @@ -From 002e593baa098b480ee0b6990ab3e43c6b36aac0 Mon Sep 17 00:00:00 2001 -From: Matthias Reichl <hias@horus.com> -Date: Sun, 11 Oct 2015 15:21:16 +0200 -Subject: [PATCH] bcm2835-i2s: add 24bit support, update bclk_ratio to more - correct values - -Code ported from bcm2708-i2s driver in Raspberry Pi tree. - -RPi commit 62c05a0b5328d9376d39c9e74da10b8a2465c234 ("ASoC: BCM2708: -Add 24 bit support") - -This adds 24 bit support to the I2S driver of the BCM2708. -Besides enabling the 24 bit flags, it includes two bug fixes: - -MMAP is not supported. Claiming this leads to strange issues -when the format of driver and file do not match. - -The datasheet states that the width extension bit should be set -for widths greater than 24, but greater or equal would be correct. -This follows from the definition of the width field. - -Signed-off-by: Florian Meier <florian.meier@koalo.de> - -RPi commit 3e8c672bc4e92d457aa4654bbb4cfd79a18a2327 ("bcm2708-i2s: -Update bclk_ratio to more correct values") - -Discussion about blck_ratio affecting sound quality: -https://github.com/raspberrypi/linux/issues/681 - -Signed-off-by: Matthias Reichl <hias@horus.com> ---- - sound/soc/bcm/bcm2835-i2s.c | 12 +++++++++--- - 1 file changed, 9 insertions(+), 3 deletions(-) - ---- a/sound/soc/bcm/bcm2835-i2s.c -+++ b/sound/soc/bcm/bcm2835-i2s.c -@@ -340,11 +340,15 @@ static int bcm2835_i2s_hw_params(struct - switch (params_format(params)) { - case SNDRV_PCM_FORMAT_S16_LE: - data_length = 16; -- bclk_ratio = 40; -+ bclk_ratio = 50; -+ break; -+ case SNDRV_PCM_FORMAT_S24_LE: -+ data_length = 24; -+ bclk_ratio = 50; - break; - case SNDRV_PCM_FORMAT_S32_LE: - data_length = 32; -- bclk_ratio = 80; -+ bclk_ratio = 100; - break; - default: - return -EINVAL; -@@ -420,7 +424,7 @@ static int bcm2835_i2s_hw_params(struct - /* Setup the frame format */ - format = BCM2835_I2S_CHEN; - -- if (data_length > 24) -+ if (data_length >= 24) - format |= BCM2835_I2S_CHWEX; - - format |= BCM2835_I2S_CHWID((data_length-8)&0xf); -@@ -711,6 +715,7 @@ static struct snd_soc_dai_driver bcm2835 - .channels_max = 2, - .rates = SNDRV_PCM_RATE_8000_192000, - .formats = SNDRV_PCM_FMTBIT_S16_LE -+ | SNDRV_PCM_FMTBIT_S24_LE - | SNDRV_PCM_FMTBIT_S32_LE - }, - .capture = { -@@ -718,6 +723,7 @@ static struct snd_soc_dai_driver bcm2835 - .channels_max = 2, - .rates = SNDRV_PCM_RATE_8000_192000, - .formats = SNDRV_PCM_FMTBIT_S16_LE -+ | SNDRV_PCM_FMTBIT_S24_LE - | SNDRV_PCM_FMTBIT_S32_LE - }, - .ops = &bcm2835_i2s_dai_ops, |