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[1/8] ASoC : dwc : add check for master/slave format

Message ID 1444320760-21936-2-git-send-email-alexander.deucher@amd.com (mailing list archive)
State New, archived
Headers show

Commit Message

Alex Deucher Oct. 8, 2015, 4:12 p.m. UTC 
From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com>

DW i2s controller's master/slave config can be read from a
read-only register. Machine driver can try to set a master/slave
format on cpu-dai using 'set_fmt' of dai ops. A check is added to
verify codec is master when dwc is slave and vice-versa.

Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
---
 sound/soc/dwc/designware_i2s.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

Comments

Mark Brown Oct. 22, 2015, 2:56 p.m. UTC | #1 
On Thu, Oct 08, 2015 at 12:12:34PM -0400, Alex Deucher wrote:
> From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com>
> 
> DW i2s controller's master/slave config can be read from a
> read-only register. Machine driver can try to set a master/slave
> format on cpu-dai using 'set_fmt' of dai ops. A check is added to
> verify codec is master when dwc is slave and vice-versa.
> 
> Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
> ---

I can't apply this, you've not added a Signed-off-by for code sent by
someone else as covered in SubmittingPatches.

Please also try to use subject lines matching the style for the
subsystem.
Alex Deucher Oct. 23, 2015, 9:12 p.m. UTC | #2 
On Thu, Oct 22, 2015 at 10:56 AM, Mark Brown <broonie@kernel.org> wrote:
> On Thu, Oct 08, 2015 at 12:12:34PM -0400, Alex Deucher wrote:
>> From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com>
>>
>> DW i2s controller's master/slave config can be read from a
>> read-only register. Machine driver can try to set a master/slave
>> format on cpu-dai using 'set_fmt' of dai ops. A check is added to
>> verify codec is master when dwc is slave and vice-versa.
>>
>> Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
>> ---
>
> I can't apply this, you've not added a Signed-off-by for code sent by
> someone else as covered in SubmittingPatches.
>
> Please also try to use subject lines matching the style for the
> subsystem.

I'll resend with these fixed up.

Thanks.

Alex
diff mbox

Patch

diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
index 3a52f82..f427325 100644
--- a/sound/soc/dwc/designware_i2s.c
+++ b/sound/soc/dwc/designware_i2s.c
@@ -341,12 +341,43 @@  static int dw_i2s_trigger(struct snd_pcm_substream *substream,
 	return ret;
 }
 
+static int dw_i2s_set_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+	struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
+	int ret = 0;
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		if (dev->capability & DW_I2S_SLAVE)
+			ret = 0;
+		else
+			ret = -EINVAL;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		if (dev->capability & DW_I2S_MASTER)
+			ret = 0;
+		else
+			ret = -EINVAL;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+	case SND_SOC_DAIFMT_CBS_CFM:
+		ret = -EINVAL;
+		break;
+	default:
+		dev_dbg(dev->dev, "dwc : Invalid master/slave format\n");
+		ret = -EINVAL;
+		break;
+	}
+	return ret;
+}
+
 static struct snd_soc_dai_ops dw_i2s_dai_ops = {
 	.startup	= dw_i2s_startup,
 	.shutdown	= dw_i2s_shutdown,
 	.hw_params	= dw_i2s_hw_params,
 	.prepare	= dw_i2s_prepare,
 	.trigger	= dw_i2s_trigger,
+	.set_fmt	= dw_i2s_set_fmt,
 };
 
 static const struct snd_soc_component_driver dw_i2s_component = {