linux-kernel - RE: [PATCH] Input: elan_i2c - add ASUS EeeBook X205TA special touchpad fw

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Date:   Tue, 7 Mar 2017 15:05:21 +0800
From:   廖崇榮 <kt.liao@....com.tw>
To:     "'Dmitry Torokhov'" <dmitry.torokhov@...il.com>
Cc:     <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "'Matjaz Hegedic'" <matjaz.hegedic@...il.com>,
        黃世鵬 經理 <phoenix@....com.tw>,
        <miller_wang@....com.tw>
Subject: RE: [PATCH] Input: elan_i2c - add ASUS EeeBook X205TA special touchpad fw

Hi Dmitry

-----Original Message-----
From: Dmitry Torokhov [mailto:dmitry.torokhov@...il.com] 
Sent: Tuesday, March 07, 2017 3:55 AM
To: KT Liao
Cc: linux-input@...r.kernel.org; linux-kernel@...r.kernel.org; Matjaz
Hegedic
Subject: Re: [PATCH] Input: elan_i2c - add ASUS EeeBook X205TA special
touchpad fw

On Sun, Mar 05, 2017 at 03:13:02AM +0100, Matjaz Hegedic wrote:
> EeeBook X205TA is yet another ASUS device with a special touchpad 
> firmware that needs to be accounted for during initialization, or else 
> the touchpad will go into an invalid state upon suspend/resume.
> Adding the appropriate ic_type and product_id check fixes the problem.

KT, does this look reasonable? Are there more ASUS models that need such
handling?
[KT] : I just discuss it with FW team. 
We can't confirm it right now because it's an old product. And the solution
focus on power-on issue, not suspend/resume.
I will let you know once we figure it out.

Our FW has modified, the issue should not happen on new models.

Thanks		KT
> 
> Signed-off-by: Matjaz Hegedic <matjaz.hegedic@...il.com>
> ---
>  drivers/input/mouse/elan_i2c_core.c | 22 ++++++++++++----------
>  1 file changed, 12 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/input/mouse/elan_i2c_core.c 
> b/drivers/input/mouse/elan_i2c_core.c
> index 2c7d287..dde3ad7 100644
> --- a/drivers/input/mouse/elan_i2c_core.c
> +++ b/drivers/input/mouse/elan_i2c_core.c
> @@ -218,17 +218,19 @@ static int elan_query_product(struct 
> elan_tp_data *data)
>  
>  static int elan_check_ASUS_special_fw(struct elan_tp_data *data)  {
> -	if (data->ic_type != 0x0E)
> -		return false;
> -
> -	switch (data->product_id) {
> -	case 0x05 ... 0x07:
> -	case 0x09:
> -	case 0x13:
> -		return true;
> -	default:
> -		return false;
> +	if (data->ic_type == 0x0E) {
> +		switch (data->product_id) {
> +		case 0x05 ... 0x07:
> +		case 0x09:
> +		case 0x13:
> +			return true;
> +		}
>  	}
> +	/* ASUS EeeBook X205TA */
> +	else if (data->ic_type == 0x8 && data->product_id == 0x26)
> +		return true;
> +
> +	return false;
>  }
>  
>  static int __elan_initialize(struct elan_tp_data *data)
> --
> 2.7.4
> 

Thanks.

-- 
Dmitry