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ASoC: Intel: bytcr_rt5651: Add support for externar amplifier enable GPIO

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The rt5651 does not have a built-in speaker amplifier, so it is often
used together with an external amplifier. On Cherry Trail boards this
external amplifier's enable pin is driven through a GPIO, which is
given as the first GPIO in the ACPI resources of the codec fwnode.

This commit adds support to the bytcr_rt5651 for this GPIO, fixing
the speaker not working on CHT devices with a rt5651 codec.

Cc: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Hans de Goede 2018-07-01 20:36:31 +02:00 committed by Mark Brown
parent 2c375204bf
commit 5f6fb23d2e
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 62 additions and 3 deletions
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65
sound/soc/intel/boards/bytcr_rt5651.c
View File

@ -26,6 +26,8 @@
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/machine.h>
#include <linux/slab.h>
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
@ -86,6 +88,7 @@ enum {
struct byt_rt5651_private {
struct clk *mclk;
struct gpio_desc *ext_amp_gpio;
struct snd_soc_jack jack;
};
@ -208,6 +211,20 @@ static int platform_clock_control(struct snd_soc_dapm_widget *w,
return 0;
}
static int rt5651_ext_amp_power_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_card *card = w->dapm->card;
struct byt_rt5651_private *priv = snd_soc_card_get_drvdata(card);
if (SND_SOC_DAPM_EVENT_ON(event))
gpiod_set_value_cansleep(priv->ext_amp_gpio, 1);
else
gpiod_set_value_cansleep(priv->ext_amp_gpio, 0);
return 0;
}
static const struct snd_soc_dapm_widget byt_rt5651_widgets[] = {
SND_SOC_DAPM_HP("Headphone", NULL),
SND_SOC_DAPM_MIC("Headset Mic", NULL),
@ -217,7 +234,9 @@ static const struct snd_soc_dapm_widget byt_rt5651_widgets[] = {
SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
platform_clock_control, SND_SOC_DAPM_PRE_PMU |
SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SUPPLY("Ext Amp Power", SND_SOC_NOPM, 0, 0,
rt5651_ext_amp_power_event,
SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMU),
};
static const struct snd_soc_dapm_route byt_rt5651_audio_map[] = {
@ -225,6 +244,7 @@ static const struct snd_soc_dapm_route byt_rt5651_audio_map[] = {
{"Headset Mic", NULL, "Platform Clock"},
{"Internal Mic", NULL, "Platform Clock"},
{"Speaker", NULL, "Platform Clock"},
{"Speaker", NULL, "Ext Amp Power"},
{"Line In", NULL, "Platform Clock"},
{"Headset Mic", NULL, "micbias1"}, /* lowercase for rt5651 */
@ -678,6 +698,18 @@ static const struct x86_cpu_id baytrail_cpu_ids[] = {
{}
};
static const struct x86_cpu_id cherrytrail_cpu_ids[] = {
{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_AIRMONT }, /* Braswell */
{}
};
static const struct acpi_gpio_params ext_amp_enable_gpios = { 0, 0, false };
static const struct acpi_gpio_mapping byt_rt5651_gpios[] = {
{ "ext-amp-enable-gpios", &ext_amp_enable_gpios, 1 },
{ },
};
struct acpi_chan_package { /* ACPICA seems to require 64 bit integers */
u64 aif_value; /* 1: AIF1, 2: AIF2 */
u64 mclock_value; /* usually 25MHz (0x17d7940), ignored */
@ -793,9 +825,36 @@ static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
/* Must be called before register_card, also see declaration comment. */
ret_val = byt_rt5651_add_codec_device_props(codec_dev);
put_device(codec_dev);
if (ret_val)
if (ret_val) {
put_device(codec_dev);
return ret_val;
}
/* Cherry Trail devices use an external amplifier enable gpio */
if (x86_match_cpu(cherrytrail_cpu_ids)) {
devm_acpi_dev_add_driver_gpios(codec_dev, byt_rt5651_gpios);
priv->ext_amp_gpio = devm_fwnode_get_index_gpiod_from_child(
&pdev->dev, "ext-amp-enable", 0,
codec_dev->fwnode,
GPIOD_OUT_LOW, "speaker-amp");
if (IS_ERR(priv->ext_amp_gpio)) {
ret_val = PTR_ERR(priv->ext_amp_gpio);
switch (ret_val) {
case -ENOENT:
priv->ext_amp_gpio = NULL;
break;
default:
dev_err(&pdev->dev, "Failed to get ext-amp-enable GPIO: %d\n",
ret_val);
/* fall through */
case -EPROBE_DEFER:
put_device(codec_dev);
return ret_val;
}
}
}
put_device(codec_dev);
log_quirks(&pdev->dev);