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Commit af31a227 authored by Mark Brown's avatar Mark Brown
Browse files

ASoC: wm_hubs: Special case headphones for digital paths in more use cases 



The optimisations which we can do with caching the headphone DCS result in
wm_hubs have only been enabled in cases where class W is enabled. However,
there are more use cases which can benefit from the cache, especially with
WM8994 series devices with their more advanced digital routing.

Rather than keying off the class W information from the CODECs have a
check in wm_hubs for a suitable path and use that to determine if we can
deploy our headphone optimisations.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent f57b8488

sound/soc/codecs/wm8993.c

+0 −2
Original line number Diff line number Diff line
@@ -852,7 +852,6 @@ static int class_w_put(struct snd_kcontrol *kcontrol, 
					    0);

		}

		wm8993->class_w_users++;

		wm8993->hubs_data.class_w = true;

	}



	/* Implement the change */
@@ -869,7 +868,6 @@ static int class_w_put(struct snd_kcontrol *kcontrol, 
					    WM8993_CP_DYN_V);

		}

		wm8993->class_w_users--;

		wm8993->hubs_data.class_w = false;

	}



	dev_dbg(codec->dev, "Indirect DAC use count now %d\n",

sound/soc/codecs/wm8994.c

+1 −3
Original line number Diff line number Diff line
@@ -998,13 +998,11 @@ static void wm8994_update_class_w(struct snd_soc_codec *codec) 
				    WM8994_CP_DYN_PWR |

				    WM8994_CP_DYN_SRC_SEL_MASK,

				    source | WM8994_CP_DYN_PWR);

		wm8994->hubs.class_w = true;



	} else {

		dev_dbg(codec->dev, "Class W disabled\n");

		snd_soc_update_bits(codec, WM8994_CLASS_W_1,

				    WM8994_CP_DYN_PWR, 0);

		wm8994->hubs.class_w = false;

	}

}
@@ -3609,7 +3607,7 @@ static int wm8994_codec_probe(struct snd_soc_codec *codec) 
		wm8994->hubs.dcs_readback_mode = 2;

		wm8994->hubs.no_series_update = 1;

		wm8994->hubs.hp_startup_mode = 1;

		wm8994->hubs.no_cache_class_w = true;

		wm8994->hubs.no_cache_dac_hp_direct = true;

		wm8994->fll_byp = true;



		switch (wm8994->revision) {

sound/soc/codecs/wm_hubs.c

+42 −6
Original line number Diff line number Diff line
@@ -109,6 +109,42 @@ irqreturn_t wm_hubs_dcs_done(int irq, void *data) 
}

EXPORT_SYMBOL_GPL(wm_hubs_dcs_done);



static bool wm_hubs_dac_hp_direct(struct snd_soc_codec *codec)

{

	int reg;



	/* If we're going via the mixer we'll need to do additional checks */

	reg = snd_soc_read(codec, WM8993_OUTPUT_MIXER1);

	if (!(reg & WM8993_DACL_TO_HPOUT1L)) {

		if (reg & ~WM8993_DACL_TO_MIXOUTL) {

			dev_vdbg(codec->dev, "Analogue paths connected: %x\n",

				 reg & ~WM8993_DACL_TO_HPOUT1L);

			return false;

		} else {

			dev_vdbg(codec->dev, "HPL connected to mixer\n");

			return false;

		}

	} else {

		dev_vdbg(codec->dev, "HPL connected to DAC\n");

	}



	reg = snd_soc_read(codec, WM8993_OUTPUT_MIXER2);

	if (!(reg & WM8993_DACR_TO_HPOUT1R)) {

		if (reg & ~WM8993_DACR_TO_MIXOUTR) {

			dev_vdbg(codec->dev, "Analogue paths connected: %x\n",

				 reg & ~WM8993_DACR_TO_HPOUT1R);

			return false;

		} else {

			dev_vdbg(codec->dev, "HPR connected to mixer\n");

			return false;

		}

	} else {

		dev_vdbg(codec->dev, "HPR connected to DAC\n");

	}



	return true;

}



/*

 * Startup calibration of the DC servo

 */
@@ -129,10 +165,10 @@ static void calibrate_dc_servo(struct snd_soc_codec *codec) 


	/* If we're using a digital only path and have a previously

	 * callibrated DC servo offset stored then use that. */

	if (hubs->class_w && hubs->class_w_dcs) {

	if (wm_hubs_dac_hp_direct(codec) && hubs->dac_hp_direct_dcs) {

		dev_dbg(codec->dev, "Using cached DC servo offset %x\n",

			hubs->class_w_dcs);

		snd_soc_write(codec, dcs_reg, hubs->class_w_dcs);

			hubs->dac_hp_direct_dcs);

		snd_soc_write(codec, dcs_reg, hubs->dac_hp_direct_dcs);

		wait_for_dc_servo(codec,

				  WM8993_DCS_TRIG_DAC_WR_0 |

				  WM8993_DCS_TRIG_DAC_WR_1);
@@ -207,8 +243,8 @@ static void calibrate_dc_servo(struct snd_soc_codec *codec) 


	/* Save the callibrated offset if we're in class W mode and

	 * therefore don't have any analogue signal mixed in. */

	if (hubs->class_w && !hubs->no_cache_class_w)

		hubs->class_w_dcs = dcs_cfg;

	if (wm_hubs_dac_hp_direct(codec) && !hubs->no_cache_dac_hp_direct)

		hubs->dac_hp_direct_dcs = dcs_cfg;

}



/*
@@ -224,7 +260,7 @@ static int wm8993_put_dc_servo(struct snd_kcontrol *kcontrol, 
	ret = snd_soc_put_volsw(kcontrol, ucontrol);



	/* Updating the analogue gains invalidates the DC servo cache */

	hubs->class_w_dcs = 0;

	hubs->dac_hp_direct_dcs = 0;



	/* If we're applying an offset correction then updating the

	 * callibration would be likely to introduce further offsets. */

sound/soc/codecs/wm_hubs.h

+2 −3
Original line number Diff line number Diff line
@@ -30,9 +30,8 @@ struct wm_hubs_data { 
	int series_startup;

	int no_series_update;



	bool no_cache_class_w;

	bool class_w;

	u16 class_w_dcs;

	bool no_cache_dac_hp_direct;

	u16 dac_hp_direct_dcs;



	bool lineout1_se;

	bool lineout1n_ena;