[Freedreno] HP-TouchPad , touchscreen driver

[vinay simha]

Andreas,

In hp chromebook the way touchscreen is added would be different, it will
be either USB(hid) based touchscreen. In general laptops will have usb(hid)
touchscreens. Default linux drivers and x11 supports that.

For mobiles it will be having mipi dsi(for display) interfaces and uses
i2c/spi interface for touchscreen. Android have it's own framework to
handle the touchscreens.

Regards,
vinay simha

On Wed, Nov 12, 2014 at 9:18 PM, vinay simha <
vinaysimha at inforcecomputing.com> wrote:

> added the respective driver of himax controller(based on i2c), to link
> this with x11 added the 69-himaxtouch.conf
>
> root at linaro-gnome:~# more /usr/share/X11/xorg.conf.d/69-himaxtouch.conf
> Section "InputClass"
>           Identifier  "himax-touchscreen"
>           Driver      "evdev"
>           #Driver      "himax8526a"
>           Option      "Type" "finger"
>           Option      "Device" "/dev/input/event1"
>           Option      "ScreenNo" "0"
>           Option      "MinimumXPosition" "0"
>           Option      "MaximumXPosition" "480"
>           Option      "MinimumYPosition" "0"
>           Option      "MaximumYPosition" "864"
>           Option      "Calibration" "0 480 0 864"
> EndSection
>
> When i touch the screen(cursor doesnt move accordigly) dmesg logs
> pmic8xxx_pwrkey: Attempted to start touch without x/y (driver bug)
>
> i do get responses to "cat /dev/input/event1"
> cat /proc/bus/input/devices
>
> I: Bus=0000 Vendor=0000 Product=0000 Version=0000
> N: Name="himax-touchscreen"
> P: Phys=
> S: Sysfs=/devices/virtual/input/input1
> U: Uniq=
> H: Handlers=event1 cpufreq
> B: PROP=2
> B: EV=b
> B: KEY=400 0 0 0 0 0 0 0 0 0 0
> B: ABS=2650000 10000000
>
>
> Regards,
> vinay simha
>
> On Wed, Nov 12, 2014 at 8:41 PM, Rob Clark <robdclark at gmail.com> wrote:
>
>> I don't really remember myself, but maybe someone else does.  But IIRC
>> the touchpad had some goofy userspace driver.
>>
>> I'm not an input expert, but I think if the touchscreen driver used
>> normal kernel evdev stuff, x11 should automatically detect it.  At
>> least on desktop/x86 that stuff should be plug-and-play.
>>
>> BR,
>> -R
>>
>> On Wed, Nov 12, 2014 at 4:32 AM, vinay simha
>> <vinaysimha at inforcecomputing.com> wrote:
>> > HI,
>> >
>> > What is the .conf used for touchscreen driver  for hp-touchpad ,
>> > usr/share/X11/xorg.conf.d/
>> >
>> > Is there any separate .conf used in /etc/X11/xorg.conf.d/ for
>> hp-touchpad
>> >
>> > Regards,
>> > vinay simha
>> >
>> > _______________________________________________
>> > Freedreno mailing list
>> > Freedreno at lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/freedreno
>> >
>>
>
>
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