The original modifications for this patch originate from some custom
changes made to the 3.3 Android kernel by huangxin at allwinnertech.com.
The A10/A20 DMA engine for HDMI audio only supports 16 or 32-bit
transfers. The documentation says 16, 20, and 24 bits, but I have not
been able to get 24-bit audio, ether 3-bytes (PCM_FMTBIT_24_3LE) or
4-bytes (PCM_FMTBIT_24_LE) to work.
This patch removes the non-working PCM formats, PCM_FMTBIT_S18_3LE
and PCM_FMTBIT_S20_3LE, and PCM_FMTBIT_S24_LE and adds suppor for
32-bit HDMI audio (PCM_FMTBIT_S32_LE). It's possible that other 32-bit
formats, like PCM_FMTBIT_U32_LE or PCM_FMTBIT_FLOAT_LE might work, but
couldn't be tested.
This patch was tested with 24-bit and 32-bit .wav files and the ALSA
"plughw" plugin (for upconverting the 24-bit audio files to 23-bits)
with aplay -v to verify that the target format was S32_LE.
Signed-off-by: Patrick Wood <patrickhw...@gmail.com>
---
drivers/video/sunxi/hdmi/drv_hdmi.c | 6 ++++++
drivers/video/sunxi/hdmi/hdmi_core.c | 30 +++++++++++++++++++++------
drivers/video/sunxi/hdmi/hdmi_core.h | 1 +
include/linux/drv_hdmi.h | 1 +
sound/soc/sunxi/hdmiaudio/sndhdmi.c | 16 +++++++++++++-
sound/soc/sunxi/hdmiaudio/sunxi-hdmiaudio.c | 6 ++++--
sound/soc/sunxi/hdmiaudio/sunxi-hdmipcm.c | 3 ++-
7 files changed, 53 insertions(+), 10 deletions(-)
diff --git a/drivers/video/sunxi/hdmi/drv_hdmi.c
b/drivers/video/sunxi/hdmi/drv_hdmi.c
index a8d3cef..283d2ae 100644
--- a/drivers/video/sunxi/hdmi/drv_hdmi.c
+++ b/drivers/video/sunxi/hdmi/drv_hdmi.c
@@ -208,6 +208,12 @@ static __s32 Hdmi_Set_Audio_Para(hdmi_audio_t *audio_para)
if (!audio_para)
return -1;
+ if (audio_para->sample_bit != audio_info.sample_bit) {
+ if (hdmi_state >= HDMI_State_Audio_config)
+ hdmi_state = HDMI_State_Audio_config;
+ audio_info.sample_bit = audio_para->sample_bit;
+ }
+
if (audio_para->sample_rate != audio_info.sample_rate) {
audio_info.sample_rate = audio_para->sample_rate;
change = audio_info.audio_en;
diff --git a/drivers/video/sunxi/hdmi/hdmi_core.c
b/drivers/video/sunxi/hdmi/hdmi_core.c
index c1c4c9c..a6dd01f 100644
--- a/drivers/video/sunxi/hdmi/hdmi_core.c
+++ b/drivers/video/sunxi/hdmi/hdmi_core.c
@@ -580,8 +580,14 @@ __s32 audio_config(void)
return 0;
if (audio_info.channel_num == 1) {
- /* audio fifo rst and select ddma, 2 ch 16bit pcm */
- writel(0x00000000, HDMI_AUDIO_UNKNOWN_0);
+ if (audio_info.sample_bit == 32) {
+ /* audio fifo rst and select ddma, 2 ch 32bit pcm */
+ writel(0x000e0000, HDMI_AUDIO_UNKNOWN_0);
+ } else {
+ /* audio fifo rst and select ddma, 2 ch 16bit pcm */
+ writel(0x00000000, HDMI_AUDIO_UNKNOWN_0);
+ }
+
/* ddma,pcm layout0 1ch */
writel(0x00000000, HDMI_AUDIO_LAYOUT);
writel(0x76543200, HDMI_AUDIO_UNKNOWN_1);
@@ -592,8 +598,14 @@ __s32 audio_config(void)
writel(0x00000000, HDMI_AUDIO_INFOFRAME + 8);
writel(0x00000000, HDMI_AUDIO_INFOFRAME + 12);
} else if (audio_info.channel_num == 2) {
- /* audio fifo rst and select ddma, 2 ch 16bit pcm */
- writel(0x00000000, HDMI_AUDIO_UNKNOWN_0);
+ if (audio_info.sample_bit == 32) {
+ /* audio fifo rst and select ddma, 2 ch 32bit pcm */
+ writel(0x000e0000, HDMI_AUDIO_UNKNOWN_0);
+ } else {
+ /* audio fifo rst and select ddma, 2 ch 16bit pcm */
+ writel(0x00000000, HDMI_AUDIO_UNKNOWN_0);
+ }
+
/* ddma,pcm layout0 2ch */
writel(0x00000001, HDMI_AUDIO_LAYOUT);
writel(0x76543210, HDMI_AUDIO_UNKNOWN_1);
@@ -604,8 +616,14 @@ __s32 audio_config(void)
writel(0x00000000, HDMI_AUDIO_INFOFRAME + 8);
writel(0x00000000, HDMI_AUDIO_INFOFRAME + 12);
} else if (audio_info.channel_num == 8) {
- /* audio fifo rst and select ddma, 2 ch 16bit pcm */
- writel(0x00000000, HDMI_AUDIO_UNKNOWN_0);
+ if (audio_info.sample_bit == 32) {
+ /* audio fifo rst and select ddma, 2 ch 32bit pcm */
+ writel(0x000e0000, HDMI_AUDIO_UNKNOWN_0);
+ } else {
+ /* audio fifo rst and select ddma, 2 ch 16bit pcm */
+ writel(0x00000000, HDMI_AUDIO_UNKNOWN_0);
+ }
+
/* ddma,pcm layout1 8ch */
writel(0x0000000f, HDMI_AUDIO_LAYOUT);
writel(0x76543210, HDMI_AUDIO_UNKNOWN_1);
diff --git a/drivers/video/sunxi/hdmi/hdmi_core.h
b/drivers/video/sunxi/hdmi/hdmi_core.h
index 50abbd1..7f11557 100644
--- a/drivers/video/sunxi/hdmi/hdmi_core.h
+++ b/drivers/video/sunxi/hdmi/hdmi_core.h
@@ -84,6 +84,7 @@ typedef struct audio_timing {
__s32 ACR_N;
__s32 CH_STATUS0;
__s32 CH_STATUS1;
+ __u8 sample_bit;
} HDMI_AUDIO_INFO;
diff --git a/include/linux/drv_hdmi.h b/include/linux/drv_hdmi.h
index ae0ae6d..e40180d 100644
--- a/include/linux/drv_hdmi.h
+++ b/include/linux/drv_hdmi.h
@@ -38,6 +38,7 @@ typedef struct
__u8 ws_pol;
__u8 just_pol;
__u8 channel_num;
+ __u8 sample_bit;
}hdmi_audio_t;
typedef struct
diff --git a/sound/soc/sunxi/hdmiaudio/sndhdmi.c
b/sound/soc/sunxi/hdmiaudio/sndhdmi.c
index d875c17..f291c4b 100644
--- a/sound/soc/sunxi/hdmiaudio/sndhdmi.c
+++ b/sound/soc/sunxi/hdmiaudio/sndhdmi.c
@@ -46,7 +46,7 @@ EXPORT_SYMBOL(audio_set_hdmi_func);
#define SNDHDMI_RATES (SNDRV_PCM_RATE_8000_192000|SNDRV_PCM_RATE_KNOT)
#define SNDHDMI_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
- SNDRV_PCM_FMTBIT_S18_3LE |
SNDRV_PCM_FMTBIT_S20_3LE)
+ SNDRV_PCM_FMTBIT_S32_LE)
static int sndhdmi_mute(struct snd_soc_dai *dai, int mute)
{
@@ -71,6 +71,20 @@ static int sndhdmi_hw_params(struct snd_pcm_substream
*substream,
{
hdmi_para.sample_rate = params_rate(params);
hdmi_para.channel_num = params_channels(params);
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ hdmi_para.sample_bit = 16;
+ break;
+ case SNDRV_PCM_FORMAT_S32_LE:
+ hdmi_para.sample_bit = 32;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (4 == hdmi_para.channel_num)
+ hdmi_para.channel_num = 2;
+
g_hdmi_func.hdmi_set_audio_para(&hdmi_para);
g_hdmi_func.hdmi_audio_enable(1, 1);
diff --git a/sound/soc/sunxi/hdmiaudio/sunxi-hdmiaudio.c
b/sound/soc/sunxi/hdmiaudio/sunxi-hdmiaudio.c
index 4fdd848..5080f10 100644
--- a/sound/soc/sunxi/hdmiaudio/sunxi-hdmiaudio.c
+++ b/sound/soc/sunxi/hdmiaudio/sunxi-hdmiaudio.c
@@ -557,12 +557,14 @@ static struct snd_soc_dai_driver sunxi_hdmiaudio_dai = {
.channels_min = 1,
.channels_max = 2,
.rates = SUNXI_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE,},
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE
+ },
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = SUNXI_I2S_RATES,
- .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE,},
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE
+ },
.symmetric_rates = 1,
.ops = &sunxi_hdmiaudio_dai_ops,
};
diff --git a/sound/soc/sunxi/hdmiaudio/sunxi-hdmipcm.c
b/sound/soc/sunxi/hdmiaudio/sunxi-hdmipcm.c
index b62daea..08221d2 100644
--- a/sound/soc/sunxi/hdmiaudio/sunxi-hdmipcm.c
+++ b/sound/soc/sunxi/hdmiaudio/sunxi-hdmipcm.c
@@ -39,7 +39,8 @@ static const struct snd_pcm_hardware sunxi_pcm_hardware = {
.info = SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_RESUME,
- .formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S32_LE,
.rates = SNDRV_PCM_RATE_8000_192000 |
SNDRV_PCM_RATE_KNOT,
.rate_min = 8000,
.rate_max = 192000,
