linux-kernel - RE: [PATCH] Input: elan_i2c - Make hardware buttons work properly on Asus ROG G752xx

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Date:   Thu, 17 Aug 2017 22:38:32 +0800
From:   廖崇�s <kt.liao@....com.tw>
To:     "'Dmitry Torokhov'" <dmitry.torokhov@...il.com>,
        'Maxime Bellengé' <maxime.bellenge@...il.com>
Cc:     <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        �S世�i ��理 <phoenix@....com.tw>
Subject: RE: [PATCH] Input: elan_i2c - Make hardware buttons work properly on Asus ROG G752xx



-----Original Message-----
From: Dmitry Torokhov [mailto:dmitry.torokhov@...il.com] 
Sent: Thursday, August 17, 2017 2:27 AM
To: Maxime Bellengé; KT Liao
Cc: linux-input@...r.kernel.org; linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Input: elan_i2c - Make hardware buttons work properly
on Asus ROG G752xx

On Wed, Aug 16, 2017 at 01:45:13PM +0200, Maxime Bellengé wrote:
> Asus ROG G752xx laptops have hardware buttons. Currently only the left 
> button works if a finger touches the pad which is not very convenient.
> 
> I couldn't find a clear pattern based on ic type and product id to 
> determine if the device has hardware buttons or if it is a clickpad as 
> it is vendor dependant. So I chose to base the patch on dmi as I 
> couldn't find any other laptop based on elan i2c and having hardware 
> buttons.
> 

KT, any feedback here?
Basically, I think it's ok to use DMI_MATCH because 
(1) It's rare to see such kind of platform.
(2) Only one file need to be modified

We have a command to get button type.
I quickly make a patch as attached file but I don't have the platform to
test it now.
It would be great if Maxime can help to try it. Or I will test it and
upstream next week.

thanks

> Signed-off-by: Maxime Bellengé <maxime.bellenge@...il.com>
> ---
>  drivers/input/mouse/elan_i2c_core.c | 40 
> ++++++++++++++++++++++++++++++++++++-
>  1 file changed, 39 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/mouse/elan_i2c_core.c 
> b/drivers/input/mouse/elan_i2c_core.c
> index 3b616cb7c67f..fa417105898f 100644
> --- a/drivers/input/mouse/elan_i2c_core.c
> +++ b/drivers/input/mouse/elan_i2c_core.c
> @@ -37,6 +37,7 @@
>  #include <linux/of.h>
>  #include <linux/regulator/consumer.h>  #include <asm/unaligned.h>
> +#include <linux/dmi.h>
>  
>  #include "elan_i2c.h"
>  
> @@ -923,6 +924,7 @@ static void elan_report_absolute(struct elan_tp_data
*data, u8 *packet)
>  	}
>  
>  	input_report_key(input, BTN_LEFT, tp_info & 0x01);
> +        input_report_key(input, BTN_RIGHT, tp_info & 0x02);
>  	input_report_abs(input, ABS_DISTANCE, hover_event != 0);
>  	input_mt_report_pointer_emulation(input, true);
>  	input_sync(input);
> @@ -960,6 +962,39 @@ static irqreturn_t elan_isr(int irq, void 
> *dev_id)  }
>  
>  /*
> + * Asus ROG G752xx have hardware buttons */ static const struct 
> + dmi_system_id elan_dmi_has_hw_buttons[] = { #if defined(CONFIG_DMI) 
> + && defined(CONFIG_X86)
> + 	{
> + 		.matches = {
> + 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> + 			DMI_MATCH(DMI_PRODUCT_NAME, "G752VT"),
> + 		},
> + 	},
> + 	{
> + 		.matches = {
> + 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> + 			DMI_MATCH(DMI_PRODUCT_NAME, "G752VS"),
> + 		},
> + 	},
> +        {
> + 		.matches = {
> + 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> + 			DMI_MATCH(DMI_PRODUCT_NAME, "G752VY"),
> + 		},
> + 	},
> +        {
> + 		.matches = {
> + 			DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
> + 			DMI_MATCH(DMI_PRODUCT_NAME, "G752VL"),
> + 		},
> + 	},
> + #endif
> + 	{ }
> + };
> +
> +/*
>   ******************************************************************
>   * Elan initialization functions
>   ******************************************************************
> @@ -991,7 +1026,10 @@ static int elan_setup_input_device(struct 
> elan_tp_data *data)
>  
>  	__set_bit(EV_ABS, input->evbit);
>  	__set_bit(INPUT_PROP_POINTER, input->propbit);
> -	__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
> +        if (dmi_check_system(elan_dmi_has_hw_buttons)) {
> +                __set_bit(BTN_RIGHT, input->keybit);
> +        } else
> +	       __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
>  	__set_bit(BTN_LEFT, input->keybit);
>  
>  	/* Set up ST parameters */
> --
> 2.13.5
> 

-- 
Dmitry

Download attachment "0001-Input-elan_i2c-Add-support-for-two-physical-button.patch" of type "application/octet-stream" (4329 bytes)