Subject: Re: [PATCH 6.1 07/73] HID: multitouch: Get the contact ID from HID_DG_TRANSDUCER_INDEX fields in case of Apple Touch Bar

From: Greg Kroah-Hartman <[email-masked]>
Date: Thu, 2 Oct 2025 09:09:50 +0200

On Tue, Sep 30, 2025 at 08:53:35PM +0530, Aditya Garg wrote:
> 
> 
> On 30/09/25 8:17 pm, Greg Kroah-Hartman wrote:
> > 6.1-stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Kerem Karabay <[email-masked]>
> > 
> > [ Upstream commit f41d736acc039d86512951f4e874b0f5e666babf ]
> > 
> > In Apple Touch Bar, the contact ID is contained in fields with the
> > HID_DG_TRANSDUCER_INDEX usage rather than HID_DG_CONTACTID, thus differing
> > from the HID spec. Add a quirk for the same.
> > 
> 
> All these hid-multitouch patches were a part of appletbdrm driver upstreamed since kernel 6.15.
> 
> Due to 2 different trees, and some delay in review by hid maintainers, these got upstreamed in 6.17.
> 
> So, in case you wish to backport to stable, IMO, backport only till 6.15, which in practicality is just 6.16 as of today.

Thanks, I'll drop this from everything except the 6.16.y tree.

greg k-h