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Message-ID: <e5e54be2-7be1-9496-b455-336e9edfb406@redhat.com>
Date: Thu, 24 Jan 2019 13:18:40 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
Bartosz Golaszewski <bgolaszewski@...libre.com>,
Linus Walleij <linus.walleij@...aro.org>,
linux-gpio@...r.kernel.org,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
linux-acpi@...r.kernel.org,
Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
Liam Girdwood <liam.r.girdwood@...ux.intel.com>,
Jie Yang <yang.jie@...ux.intel.com>,
Mark Brown <broonie@...nel.org>, alsa-devel@...a-project.org,
linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [RFT][PATCH v2] gpiolib: acpi: Introduce
ACPI_GPIO_QUIRK_ONLY_GPIOIO
Hi,
On 09-01-19 11:52, Andy Shevchenko wrote:
> New quirk enforces search for GPIO based on its type,
> i.e. iterate over GpioIo resources only.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
>
> - it was sent few weeks ago to Hans for testing, but better to re-test
I've just re-tested this on a device which uses the speaker-enable
GPIO with a rt5651 codec, still works as advertised:
Tested-by: Hans de Goede <hdegoede@...hat.com>
Regards,
Hans
> - it's supposed to go via ASoC subsystem due to recent changes made for
> sound driver
>
> v2:
> - Expand explanation why this quirk might be needed (Mika)
>
> drivers/gpio/gpiolib-acpi.c | 15 ++++--
> include/linux/acpi.h | 7 +++
> sound/soc/intel/boards/bytcr_rt5651.c | 74 ++++-----------------------
> 3 files changed, 27 insertions(+), 69 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
> index 259cf6ab969b..4d291b75cb9f 100644
> --- a/drivers/gpio/gpiolib-acpi.c
> +++ b/drivers/gpio/gpiolib-acpi.c
> @@ -530,17 +530,24 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data)
> if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
> return 1;
>
> - if (lookup->n++ == lookup->index && !lookup->desc) {
> + if (!lookup->desc) {
> const struct acpi_resource_gpio *agpio = &ares->data.gpio;
> - int pin_index = lookup->pin_index;
> + bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
> + int pin_index;
>
> + if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint)
> + lookup->index++;
> +
> + if (lookup->n++ != lookup->index)
> + return 1;
> +
> + pin_index = lookup->pin_index;
> if (pin_index >= agpio->pin_table_length)
> return 1;
>
> lookup->desc = acpi_get_gpiod(agpio->resource_source.string_ptr,
> agpio->pin_table[pin_index]);
> - lookup->info.gpioint =
> - agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT;
> + lookup->info.gpioint = gpioint;
>
> /*
> * Polarity and triggering are only specified for GpioInt
> diff --git a/include/linux/acpi.h b/include/linux/acpi.h
> index 1e89c688139f..430fd0b6df7b 100644
> --- a/include/linux/acpi.h
> +++ b/include/linux/acpi.h
> @@ -1020,6 +1020,13 @@ struct acpi_gpio_mapping {
>
> /* Ignore IoRestriction field */
> #define ACPI_GPIO_QUIRK_NO_IO_RESTRICTION BIT(0)
> +/*
> + * When ACPI GPIO mapping table is in use the index parameter inside it
> + * refers to the GPIO resource in _CRS method. That index has no
> + * distinction of actual type of the resource. When consumer wants to
> + * get GpioIo type explicitly, this quirk may be used.
> + */
> +#define ACPI_GPIO_QUIRK_ONLY_GPIOIO BIT(1)
>
> unsigned int quirks;
> };
> diff --git a/sound/soc/intel/boards/bytcr_rt5651.c b/sound/soc/intel/boards/bytcr_rt5651.c
> index b618d984e2d5..99d0c01a1bec 100644
> --- a/sound/soc/intel/boards/bytcr_rt5651.c
> +++ b/sound/soc/intel/boards/bytcr_rt5651.c
> @@ -844,74 +844,18 @@ static const struct x86_cpu_id cherrytrail_cpu_ids[] = {
> {}
> };
>
> -static const struct acpi_gpio_params first_gpio = { 0, 0, false };
> -static const struct acpi_gpio_params second_gpio = { 1, 0, false };
> +static const struct acpi_gpio_params ext_amp_enable_gpios = { 0, 0, false };
>
> -static const struct acpi_gpio_mapping byt_rt5651_amp_en_first[] = {
> - { "ext-amp-enable-gpios", &first_gpio, 1 },
> - { },
> -};
> -
> -static const struct acpi_gpio_mapping byt_rt5651_amp_en_second[] = {
> - { "ext-amp-enable-gpios", &second_gpio, 1 },
> +static const struct acpi_gpio_mapping cht_rt5651_gpios[] = {
> + /*
> + * Some boards have I2cSerialBusV2, GpioIo, GpioInt as ACPI resources,
> + * other boards may have I2cSerialBusV2, GpioInt, GpioIo instead.
> + * We want the GpioIo one for the ext-amp-enable-gpio.
> + */
> + { "ext-amp-enable-gpios", &ext_amp_enable_gpios, 1, ACPI_GPIO_QUIRK_ONLY_GPIOIO },
> { },
> };
>
> -/*
> - * Some boards have I2cSerialBusV2, GpioIo, GpioInt as ACPI resources, other
> - * boards may have I2cSerialBusV2, GpioInt, GpioIo instead. We want the
> - * GpioIo one for the ext-amp-enable-gpio and both count for the index in
> - * acpi_gpio_params index. So we have 2 different mappings and the code
> - * below figures out which one to use.
> - */
> -struct byt_rt5651_acpi_resource_data {
> - int gpio_count;
> - int gpio_int_idx;
> -};
> -
> -static int snd_byt_rt5651_acpi_resource(struct acpi_resource *ares, void *arg)
> -{
> - struct byt_rt5651_acpi_resource_data *data = arg;
> -
> - if (ares->type != ACPI_RESOURCE_TYPE_GPIO)
> - return 0;
> -
> - if (ares->data.gpio.connection_type == ACPI_RESOURCE_GPIO_TYPE_INT)
> - data->gpio_int_idx = data->gpio_count;
> -
> - data->gpio_count++;
> - return 0;
> -}
> -
> -static void snd_byt_rt5651_mc_pick_amp_en_gpio_mapping(struct device *codec)
> -{
> - struct byt_rt5651_acpi_resource_data data = { 0, -1 };
> - LIST_HEAD(resources);
> - int ret;
> -
> - ret = acpi_dev_get_resources(ACPI_COMPANION(codec), &resources,
> - snd_byt_rt5651_acpi_resource, &data);
> - if (ret < 0) {
> - dev_warn(codec, "Failed to get ACPI resources, not adding external amplifier GPIO mapping\n");
> - return;
> - }
> -
> - /* All info we need is gathered during the walk */
> - acpi_dev_free_resource_list(&resources);
> -
> - switch (data.gpio_int_idx) {
> - case 0:
> - byt_rt5651_gpios = byt_rt5651_amp_en_second;
> - break;
> - case 1:
> - byt_rt5651_gpios = byt_rt5651_amp_en_first;
> - break;
> - default:
> - dev_warn(codec, "Unknown GpioInt index %d, not adding external amplifier GPIO mapping\n",
> - data.gpio_int_idx);
> - }
> -}
> -
> 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 */
> @@ -1037,7 +981,7 @@ static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
>
> /* Cherry Trail devices use an external amplifier enable gpio */
> if (x86_match_cpu(cherrytrail_cpu_ids) && !byt_rt5651_gpios)
> - snd_byt_rt5651_mc_pick_amp_en_gpio_mapping(codec_dev);
> + byt_rt5651_gpios = cht_rt5651_gpios;
>
> if (byt_rt5651_gpios) {
> devm_acpi_dev_add_driver_gpios(codec_dev, byt_rt5651_gpios);
>
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