On Wed, Mar 08, 2017 at 02:30:42PM +0800, 廖崇榮 wrote: > Hi Matjaz, > > -----Original Message----- > From: Matjaž Hegedič [mailto:matjaz.hegedic@xxxxxxxxx] > Sent: Tuesday, March 07, 2017 6:52 PM > To: 廖崇榮; 'Dmitry Torokhov' > Cc: linux-input@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; 黃世鵬 經理; miller_wang@xxxxxxxxxx > Subject: Re: [PATCH] Input: elan_i2c - add ASUS EeeBook X205TA special touchpad fw > > Hi Dmitry, KT! > > On 2017-03-07 08:05, 廖崇榮 wrote: > > Hi Dmitry > > > > -----Original Message----- > > From: Dmitry Torokhov [mailto:dmitry.torokhov@xxxxxxxxx] > > Sent: Tuesday, March 07, 2017 3:55 AM > > To: KT Liao > > Cc: linux-input@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; 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 > > As it is now, the touchpad will stop working upon resume, returning an invalid id (and requires a cumbersome workaround of reloading the module). As the touchpad FW is opaque to me, the only way I could resolve the bug was through trial-and-error. Including the touchpad in the 'special fw' resolves the bug and the touchpad resumes without issue. > > Now, even if the function is indeed used to resolve a different issue on other ASUS touchpads, I would argue that this is the most pragmatic way of resolving the problem on X205TA, X205TAW and F205TA (and possibly also X200HA & X206HA, though I don't have those to test). > > It shouldn't affect any other models or touchpad products. > > Thanks! > > I agree your opinion. > The special handle simply changes the sequence of commands and adds delay cycle. > It is harmless to general Elan products but rescue control flaws in some FW. > > Thanks KT OK, I added KT as Acked-by and marked for stable. Thanks. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
