linux-kernel - Re: [PATCH 1/2] Input: atmel_mxt_ts - Implement support for T100 touch object

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Date:	Thu, 6 Aug 2015 12:51:28 +0200
From:	Dirk Behme <dirk.behme@...bosch.com>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Henrik Rydberg <rydberg@...omail.se>,
	Nick Dyer <nick.dyer@...ev.co.uk>,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olof@...om.net>,
	Yufeng Shen <miletus@...omium.org>,
	Benson Leung <bleung@...omium.org>,
	Chung-yih Wang <cywang@...omium.org>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] Input: atmel_mxt_ts - Implement support for T100
 touch object

On 17.03.2015 15:00, Javier Martinez Canillas wrote:
> From: Nick Dyer <nick.dyer@...ev.co.uk>
>
> Add support for the new T100 object which replaces the previous
> T9 multitouch touchscreen object in recent maXTouch devices.
> T100 provides improved reporting with selectable auxiliary
> information, and a type field for hover/stylus/glove reporting.
>
> The hovering finger support was based on Chung-Yih's work in
> the ChromiumOS downstream kernel:
>
> https://chromium-review.googlesource.com/#/c/219280/
>
> Signed-off-by: Nick Dyer <nick.dyer@...ev.co.uk>
> Acked-by: Yufeng Shen <miletus@...omium.org>
> [javier: Factor out T9 and T100 init functions and rework hover support]
> Signed-off-by: Javier Martinez Canillas <javier.martinez@...labora.co.uk>
> ---
>   drivers/input/touchscreen/atmel_mxt_ts.c | 323 +++++++++++++++++++++++++++++--
>   1 file changed, 302 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
> index 95ee92a91bd2..749371761669 100644
> --- a/drivers/input/touchscreen/atmel_mxt_ts.c
> +++ b/drivers/input/touchscreen/atmel_mxt_ts.c
...
> @@ -1612,9 +1856,8 @@ static int mxt_initialize_t9_input_device(struct mxt_data *data)
>   	input_dev->open = mxt_input_open;
>   	input_dev->close = mxt_input_close;
>
> -	__set_bit(EV_ABS, input_dev->evbit);
> -	__set_bit(EV_KEY, input_dev->evbit);
> -	__set_bit(BTN_TOUCH, input_dev->keybit);
> +	set_bit(EV_ABS, input_dev->evbit);
> +	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);


Having this patch in mainline as commit 
b23157dc74272ac8ebffd1a566e3e822dbc3e65f [1] breaks our Atmel touch.

It seems that above

+	set_bit(EV_ABS, input_dev->evbit);

is missing in the version which went into mainline? Re-adding it makes 
it work for us, again.

Opinions?

Best regards

Dirk

[1] 
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/input/touchscreen/atmel_mxt_ts.c?id=b23157dc74272ac8ebffd1a566e3e822dbc3e65f



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