> -----Original Message-----
> From: Nicolin Chen [mailto:[email protected]]
> Sent: Tuesday, April 01, 2014 11:38 AM
> To: Wang Dongsheng-B40534
> Cc: [email protected]; [email protected]; Xiubo Li-B47053; linuxppc-
> [email protected]; [email protected]; [email protected]
> Subject: Re: [PATCH bisect 2/2] ASoC: fsl_sai: Separately enable interrupts for
> Tx and Rx streams
>
> On Tue, Apr 01, 2014 at 11:48:16AM +0800, Wang Dongsheng-B40534 wrote:
> >
> >
> > > -----Original Message-----
> > > From: Nicolin Chen [mailto:[email protected]]
> > > Sent: Tuesday, April 01, 2014 11:14 AM
> > > To: Wang Dongsheng-B40534
> > > Cc: [email protected]; [email protected]; Xiubo Li-B47053;
> linuxppc-
> > > [email protected]; [email protected]; [email protected]
> > > Subject: Re: [PATCH bisect 2/2] ASoC: fsl_sai: Separately enable interrupts
> for
> > > Tx and Rx streams
> > >
> > > On Tue, Apr 01, 2014 at 11:25:02AM +0800, Wang Dongsheng-B40534 wrote:
> > > > > Subject: [PATCH bisect 2/2] ASoC: fsl_sai: Separately enable interrupts
> for
> > > Tx
> > > > > and Rx streams
> > > > >
> > > > > We only enable one side interrupt for each stream since over/underrun
> > > > > on the opposite stream would be resulted from what we previously did,
> > > > > enabling TERE but remaining FRDE disabled, even though the xrun on the
> > > > > opposite direction will not break the current stream.
> > > > >
> > > > > Signed-off-by: Nicolin Chen <[email protected]>
> > > > > Acked-by: Xiubo Li <[email protected]>
> > > > > ---
> > > > > sound/soc/fsl/fsl_sai.c | 8 ++++++--
> > > > > sound/soc/fsl/fsl_sai.h | 1 +
> > > > > 2 files changed, 7 insertions(+), 2 deletions(-)
> > > > >
> > > > > diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
> > > > > index bdfd497..d64c33f 100644
> > > > > --- a/sound/soc/fsl/fsl_sai.c
> > > > > +++ b/sound/soc/fsl/fsl_sai.c
> > > > > @@ -397,4 +397,6 @@ static int fsl_sai_trigger(struct snd_pcm_substream
> > > > > *substream, int cmd,
> > > > >
> > > > > regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
> > > > > + FSL_SAI_CSR_xIE_MASK, FSL_SAI_FLAGS);
> > > > > + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
> > > > > FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE);
> > > > > break;
> > > > > @@ -404,4 +406,6 @@ static int fsl_sai_trigger(struct snd_pcm_substream
> > > > > *substream, int cmd,
> > > > > regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
> > > > > FSL_SAI_CSR_FRDE, 0);
> > > > > + regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
> > > > > + FSL_SAI_CSR_xIE_MASK, 0);
> > > > >
> > > > > if (!(tcsr & FSL_SAI_CSR_FRDE || rcsr & FSL_SAI_CSR_FRDE)) {
> > > > > @@ -464,6 +468,6 @@ static int fsl_sai_dai_probe(struct snd_soc_dai
> *cpu_dai)
> > > > > struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev);
> > > > >
> > > > > - regmap_update_bits(sai->regmap, FSL_SAI_TCSR, 0xffffffff,
> FSL_SAI_FLAGS);
> > > > > - regmap_update_bits(sai->regmap, FSL_SAI_RCSR, 0xffffffff,
> FSL_SAI_FLAGS);
> > > > > + regmap_update_bits(sai->regmap, FSL_SAI_TCSR, 0xffffffff, 0x0);
> > > > > + regmap_update_bits(sai->regmap, FSL_SAI_RCSR, 0xffffffff, 0x0);
> > > >
> > > > Why are you remove this macro? Don't use magic number.
> > >
> > > It's pretty clear that the so-called magic number is to clear the settings
> > > in the registers for driver init as what this driver did at the first place
> > > -- no offense but I don't think you would ask this if you check the git-log
> > > of the driver.
> > >
> > ~FSL_SAI_MASK is better than 0x0. And you also replace 0xffffffff.
>
> I would later send a patch to reset SAI for a true init instead of these lines
> but not within this patch as it's focusing on the interrupts enabling.
>
> So please don't grasp the mask here. Just let me continue.
>
:), fine.
Regards,
-Dongsheng
> Thank you,
> Nicolin Chen