linux-kernel - Re: [PATCH 1/2] input: Add support of Synaptics Clickpad device

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Message-ID: <s5hochfpwf6.wl%tiwai@suse.de>
Date:	Mon, 19 Apr 2010 12:29:49 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] input: Add support of Synaptics Clickpad device

Hi Dmitry,

At Mon, 19 Apr 2010 01:32:22 -0700,
Dmitry Torokhov wrote:
> 
> Hi Takashi,
> 
> On Wed, Apr 14, 2010 at 05:10:22PM +0200, Takashi Iwai wrote:
> > Add the detection of Synaptics Clickpad device.
> > The device can be detected a new query command 0x0c.  The clickpad
> > flags are in cap[0]:4 and cap[1]:0 bits.  But, the driver checks
> > first the product id bits in the ext capabilities to be sure, so
> > that it skips the new check on older devices.
> > 
> 
> Instead of looking at the product id, can we check the number of
> supported extended capabilities queries and act accordingly, like the
> patch below?

Yes, it worked.  (Though, I've tested only new machines.)


> @@ -162,6 +163,16 @@ static int synaptics_capability(struct psmouse *psmouse)
>  				priv->ext_cap &= 0xff0fff;
>  		}
>  	}
> +
> +	if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
> +		if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
> +			printk(KERN_ERR "Synaptics claims to have extended capability 0x0c,"
> +			       " but I'm not able to read it.");

Here missing a newline, BTW.


thanks,

Takashi
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