From: Bastien Nocera <hadess@hadess.net>
To: Peter Cai <peter@typeblog.net>, Hans de Goede <hdegoede@redhat.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
linux-gpio@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-input@vger.kernel.org
Subject: Re: [PATCH v3 2/2] touchscreen: goodix: define GPIO mapping for GPD P2 Max
Date: Mon, 02 Mar 2020 12:57:18 +0100 [thread overview]
Message-ID: <daeec373292e14c6aea179ddf690a5dace6c83f7.camel@hadess.net> (raw)
In-Reply-To: <20190902124352.12291-2-peter@typeblog.net>
On Mon, 2019-09-02 at 20:43 +0800, Peter Cai wrote:
> The firmware of GPD P2 Max could not handle panel resets although
> code
> is present in DSDT. The kernel needs to take on this job instead, but
> the DSDT does not provide _DSD, rendering kernel helpless when trying
> to
> find the respective GPIO pins.
>
> Fortunately, this time GPD has proper DMI vendor / product strings
> that
> we could match against. We simply apply an acpi_gpio_mapping table
> when
> GPD P2 Max is matched.
>
> Additionally, the DSDT definition of the irq pin specifies a wrong
> polarity. The new quirk introduced in the previous patch
> (ACPI_GPIO_QUIRK_OVERRIDE_POLARITY) is applied to correct this.
Hans has posted a patchset which reworks GPIO access for ACPI devices.
Could you please check whether you could rebase your patch on top of
that?
I also think the comment in "Input: goodix - Add support for getting
IRQ + reset GPIOs on Cherry Trail devices" might also be of use:
+ case irq_pin_access_acpi_gpio:
+ /*
+ * The IRQ pin triggers on a falling edge, so its gets
marked
+ * as active-low, use output_raw to avoid the value
inversion.
+ */
Cheers
next prev parent reply other threads:[~2020-03-02 11:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-31 3:09 [PATCH v2 1/2] gpio: acpi: add quirk to override GpioInt polarity Peter Cai
2019-08-31 3:09 ` [PATCH v2 2/2] touchscreen: goodix: define GPIO mapping for GPD P2 Max Peter Cai
2019-09-02 10:04 ` Andy Shevchenko
2019-09-02 10:01 ` [PATCH v2 1/2] gpio: acpi: add quirk to override GpioInt polarity Andy Shevchenko
2019-09-02 13:36 ` Linus Walleij
2019-09-02 16:06 ` Andy Shevchenko
2019-09-02 12:43 ` [PATCH v3 " Peter Cai
2019-09-02 12:43 ` [PATCH v3 2/2] touchscreen: goodix: define GPIO mapping for GPD P2 Max Peter Cai
2020-03-02 11:57 ` Bastien Nocera [this message]
2020-03-02 12:10 ` Peter Cai
2020-03-02 13:08 ` Bastien Nocera
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