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SubjectRe: [alsa-devel] [PATCH 2/2] ASoC: rockchip: i2s: set TDL and RDL to 16 bits


在 12/24/2014 07:06 AM, Dylan Reid 写道:
> On Tue, Dec 23, 2014 at 1:08 AM, Jianqun Xu <jay.xu@rock-chips.com> wrote:
>> Set Transmit Data Level(TDL) and Receive Data Level(RDL) to 16 bits.
>> Without this setting, the TDL is default to be 0x00 (means 1 bit),
>> and the RDL is default to be 0x1f (means 16 bits).
>
> My impression from the TRM was that TDL and RDL were measured in
> samples. Are you sure it's 'bits'?
You are right, I'll modify the commit message next version, thank you
>
>>
>> This patch is helpful to fix pop sound, tested on rk3288 board.
>>
>> Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
>> ---
>> sound/soc/rockchip/rockchip_i2s.c | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c
>> index c74ba37..1cd7efc 100644
>> --- a/sound/soc/rockchip/rockchip_i2s.c
>> +++ b/sound/soc/rockchip/rockchip_i2s.c
>> @@ -247,6 +247,10 @@ static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
>>
>> regmap_update_bits(i2s->regmap, I2S_TXCR, I2S_TXCR_VDW_MASK, val);
>> regmap_update_bits(i2s->regmap, I2S_RXCR, I2S_RXCR_VDW_MASK, val);
>> + regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK,
>> + I2S_DMACR_TDL(16));
>> + regmap_update_bits(i2s->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
>> + I2S_DMACR_RDL(16));
>>
>> return 0;
>> }
>> --
>> 1.9.1
>>
>>
>> _______________________________________________
>> Alsa-devel mailing list
>> Alsa-devel@alsa-project.org
>> http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
>
>
>

--
Jianqun Xu

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