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Date: Wed, 12 Sep 2012 10:57:10 +0800
From: Mark Brown <broonie@...nsource.wolfsonmicro.com>
To: Ashish Chavan <ashish.chavan@...tcummins.com>
Cc: lrg <lrg@...com>, alsa-devel <alsa-devel@...a-project.org>,
David Dajun Chen <david.chen@...semi.com>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [alsa-devel] [PATCH] ASoC: codecs: Add DA9055 codec driver
On Tue, Sep 11, 2012 at 08:33:43PM +0530, Ashish Chavan wrote:
> +/* LDO voltage level value */
> +static const char * const da9055_ldo_lvl_select_txt[] = {
> + "1.05V", "1.1V", "1.2V", "1.4V"
> +};
> +static const struct soc_enum da9055_ldo_lvl_select =
> + SOC_ENUM_SINGLE(DA9055_LDO_CTRL, 4, 4, da9055_ldo_lvl_select_txt);
There's a regulator API, if configuration is required we should be using
that.
> +/* Digital MIC clock rate select */
> +static const char * const da9055_dmic_clk_rate_txt[] = {
> + "3MHz", "1.5MHz"
> +};
> +
> +static const struct soc_enum da9055_dmic_clk_rate =
> + SOC_ENUM_SINGLE(DA9055_MIC_CONFIG, 2, 2, da9055_dmic_clk_rate_txt);
> +
> +/* Digital MIC sample phase select */
> +static const char * const da9055_dmic_phase_txt[] = {
> + "Sample on DMICCLK edges", "Sample between DMICCLK edges"
> +};
> +
> +static const struct soc_enum da9055_dmic_phase =
> + SOC_ENUM_SINGLE(DA9055_MIC_CONFIG, 1, 2, da9055_dmic_phase_txt);
> +
> +/* Digital MIC channel select */
> +static const char * const da9055_dmic_channel_select_txt[] = {
> + "Rising Left Falling Right", "Falling Left Rising Right"
> +};
Why is any of this being exposed to userspace? If this should be
configured I'd expect it to be static platform data, not something that
gets changed at runtime.
> +/* MIC bias voltage level select */
> +static const char * const da9055_mic_bias_level_txt[] = {
> + "1.6V", "1.8V", "2.1V", "2.2V"
> +};
Again, why is this being exposed to userspace/ I'm fairly sure we went
through similar stuff with your last driver...
> + SOC_DOUBLE_R_TLV("HeadPhone Volume",
> + DA9055_HP_L_GAIN, DA9055_HP_R_GAIN,
> + 0, 0x3f, 0, hp_vol_tlv),
Headphone.
> + /* Mute controls */
> + SOC_DOUBLE_R("Mic Mute Switch", DA9055_MIC_L_CTRL,
> + DA9055_MIC_R_CTRL, 6, 1, 0),
> + SOC_DOUBLE_R("Aux Mute Switch", DA9055_AUX_L_CTRL,
> + DA9055_AUX_R_CTRL, 6, 1, 0),
> + SOC_DOUBLE_R("Mixin PGA Mute Switch", DA9055_MIXIN_L_CTRL,
> + DA9055_MIXIN_R_CTRL, 6, 1, 0),
> + SOC_DOUBLE_R("ADC Mute Switch", DA9055_ADC_L_CTRL,
> + DA9055_ADC_R_CTRL, 6, 1, 0),
> + SOC_DOUBLE_R("HeadPhone Mute Switch", DA9055_HP_L_CTRL,
> + DA9055_HP_R_CTRL, 6, 1, 0),
> + SOC_SINGLE("Lineout Mute Switch", DA9055_LINE_CTRL, 6, 1, 0),
> + SOC_SINGLE("DAC Soft Mute Switch", DA9055_DAC_FILTERS5, 7, 1, 0),
No "Mute". Again, I'm fairly sure we had the same issue last time.
> + /* LDO control */
> + SOC_SINGLE("LDO Enable", DA9055_LDO_CTRL, 7, 1, 0),
> + SOC_ENUM("LDO Level Select", da9055_ldo_lvl_select),
The LDO enable should absolutely not be being exposed to userspace!
> + /* DMIC controls */
> + SOC_DOUBLE_R("DMIC Enable", DA9055_MIXIN_L_SELECT,
> + DA9055_MIXIN_R_SELECT, 7, 1, 0),
Switch if this is a mute.
> + /* MIC PGA input selection controls */
> + SOC_ENUM("Mic Left Input Select", da9055_mic_l_select),
> + SOC_ENUM("Mic Right Input Select", da9055_mic_r_select),
DAPM.
> +
> + /* ALC Controls */
> + SOC_DOUBLE_EXT("ALC Enable", DA9055_ALC_CTRL1, 3, 7, 1, 0,
> + snd_soc_get_volsw, da9055_put_alc_sw),
ALC Switch. All enable controls should be switches.
> +static int da9055_hw_params(struct snd_pcm_substream *substream,
> + struct snd_pcm_hw_params *params,
> + struct snd_soc_dai *dai)
> +{
> + struct snd_soc_codec *codec = dai->codec;
> + struct da9055_priv *da9055 = snd_soc_codec_get_drvdata(codec);
> + u8 aif_ctrl, fs;
> + u32 sysclk;
> +
> + /* Set AIF source to Left and Right ADC */
> + snd_soc_write(codec, DA9055_DIG_ROUTING_AIF,
> + DA9055_AIF_L_SRC | DA9055_AIF_R_SRC);
This should be in DAPM.
> + aif_ctrl = snd_soc_read(codec, DA9055_AIF_CTRL) & 0xf3;
Use snd_soc_update_bits() later on.
> + aif_ctrl |= (DA9055_AIF_OE | DA9055_AIF_EN);
DAPM.
> + /* In slave mode, there is only one set of divisors */
> + if (!da9055->master)
> + fout = 2822400;
Should check the user supplied this value - also, what happens if the
user sets the device to slave mode after setting up the PLL?
> + /* Enable VMID reference & master bias */
> + snd_soc_write(codec, DA9055_REFERENCES,
> + DA9055_VMID_EN | DA9055_BIAS_EN);
set_bias_level()
> + /* Enable Mic Bias */
> + snd_soc_write(codec, DA9055_MIC_BIAS_CTRL, DA9055_MIC_BIAS_EN);
DAPM for this and most of the rest of this funciton.
> + da9055->regmap = regmap_init_i2c(i2c, &da9055_regmap_config);
devm_regmap_init_i2c()
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