Hello Srinivas,
On 08/01/2017 12:49 AM, srinivas.kandagatla@linaro.org wrote:
From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
ADV7533 only supports audio samples word width from 16-24 bits. This patch restricts the audio sample sizes to the supported ones, so that sound card does not report wrong list of supported hwparms.
Without this patch aplay would fail when playing a 32 bit audio.
Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org
drivers/gpu/drm/bridge/adv7511/adv7511_audio.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c index 67469c26bae8..d01d0aa0eef7 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_audio.c @@ -214,6 +214,8 @@ static struct hdmi_codec_pdata codec_data = { .ops = &adv7511_codec_ops, .max_i2s_channels = 2, .i2s = 1,
- .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE),};
I'm not sure that this limitation is needed. I already used ADV7513 and i did not observe this limitation.
I had a look to ADV7533 data-sheet. it should support 32 and 64 bits I2S format bus, with 16 or 24 bits precision sample. So it should support SNDRV_PCM_FMTBIT_S32_LE and SNDRV_PCM_FMTBIT_S32_BE
As example, if you configure bus in Left justified format with 24 bits sample length, 32 bits application samples should be truncated to 24 bits samples at ADV7533 I2S interface level (LSB dropped).
Perhaps i missed something... but look like more an I2S bus configuration issue in your DT card description, that that a miss in the drivers.
Regards Arnaud
int adv7511_audio_init(struct device *dev, struct adv7511 *adv7511)