linux-kernel - RE: [PATCH] platform/x86: intel-vbtn: Report switch events when event wakes device

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Message-ID: <d2dac2d720574c58bb0d273809f46cf9@AUSX13MPC105.AMER.DELL.COM>
Date:   Mon, 20 May 2019 15:40:34 +0000
From:   <Mario.Limonciello@...l.com>
To:     <mathewk@...omium.org>, <linux-kernel@...r.kernel.org>
CC:     <acelan.kao@...onical.com>, <dvhart@...radead.org>,
        <andy@...radead.org>, <platform-driver-x86@...r.kernel.org>
Subject: RE: [PATCH] platform/x86: intel-vbtn: Report switch events when event
 wakes device



> -----Original Message-----
> From: platform-driver-x86-owner@...r.kernel.org <platform-driver-x86-
> owner@...r.kernel.org> On Behalf Of Mathew King
> Sent: Thursday, May 16, 2019 4:56 PM
> To: linux-kernel@...r.kernel.org
> Cc: Mathew King; AceLan Kao; Darren Hart; Andy Shevchenko; platform-driver-
> x86@...r.kernel.org
> Subject: [PATCH] platform/x86: intel-vbtn: Report switch events when event wakes
> device
> 
> 
> [EXTERNAL EMAIL]
> 
> When a switch event, such as tablet mode/laptop mode or docked/undocked,
> wakes a device make sure that the value of the swich is reported.
> Without when a device is put in tablet mode from laptop mode when it is
> suspended or vice versa the device will wake up but mode will be
> incorrect.
> 
> Tested by suspending a device in laptop mode and putting it in tablet
> mode, the device resumes and is in tablet mode. When suspending the
> device in tablet mode and putting it in laptop mode the device resumes
> and is in laptop mode.
> 
> Signed-off-by: Mathew King <mathewk@...omium.org>

Reviewed-by: Mario Limonciello <mario.limonciello@...l.com>

> ---
>  drivers/platform/x86/intel-vbtn.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c
> index 06cd7e818ed5..990cc8c20872 100644
> --- a/drivers/platform/x86/intel-vbtn.c
> +++ b/drivers/platform/x86/intel-vbtn.c
> @@ -76,12 +76,15 @@ static void notify_handler(acpi_handle handle, u32 event,
> void *context)
>  	struct platform_device *device = context;
>  	struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
>  	unsigned int val = !(event & 1); /* Even=press, Odd=release */
> -	const struct key_entry *ke_rel;
> +	const struct key_entry *ke, *ke_rel;
>  	bool autorelease;
> 
>  	if (priv->wakeup_mode) {
> -		if (sparse_keymap_entry_from_scancode(priv->input_dev, event))
> {
> +		ke = sparse_keymap_entry_from_scancode(priv->input_dev,
> event);
> +		if (ke) {
>  			pm_wakeup_hard_event(&device->dev);
> +			if (ke->type == KE_SW)
> +				sparse_keymap_report_event(priv->input_dev,
> event, val, 0);
>  			return;
>  		}
>  		goto out_unknown;
> --
> 2.21.0.1020.gf2820cf01a-goog