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

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Date:   Wed, 16 Aug 2017 11:27:04 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Maxime Bellengé <maxime.bellenge@...il.com>,
        KT Liao <kt.liao@....com.tw>
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?

> 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