linux-kernel - Re: [PATCH v2] Input: goodix - Fix touch coords on WinBook TW100 and TW700

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Date:	Fri, 24 Jul 2015 13:13:24 +0200
From:	Bastien Nocera <hadess@...ess.net>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Input: goodix - Fix touch coords on WinBook TW100
 and TW700

On Thu, 2015-07-23 at 14:56 -0700, Dmitry Torokhov wrote:
> Hi Bastien,
> 
> On Thu, Jul 23, 2015 at 04:13:28PM +0200, Bastien Nocera wrote:
> > The touchscreen on the WinBook TW100 and TW700 don't match the 
> > default
> > display, with 0,0 touches being reported when touching at the 
> > bottom
> > right of the screen.
> > 
> >   1280,800             0,800
> >          +-------------+
> >          |             |
> >          |             |
> >          |             |
> >          +-------------+
> >     1280,0             0,0
> > 
> > It's unfortunately impossible to detect this problem with data from 
> > the
> > DSDT, or other auxiliary metadata, so fallback to quirking this 
> > specific
> > model of tablet instead.
> > 
> > Signed-off-by: Bastien Nocera <hadess@...ess.net>
> > Reviewed-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> > ---
> >  drivers/input/touchscreen/goodix.c | 31 
> > +++++++++++++++++++++++++++++++
> >  1 file changed, 31 insertions(+)
> > 
> > diff --git a/drivers/input/touchscreen/goodix.c 
> > b/drivers/input/touchscreen/goodix.c
> > index b4d12e2..3722806 100644
> > --- a/drivers/input/touchscreen/goodix.c
> > +++ b/drivers/input/touchscreen/goodix.c
> > @@ -15,6 +15,7 @@
> >   */
> >  
> >  #include <linux/kernel.h>
> > +#include <linux/dmi.h>
> >  #include <linux/i2c.h>
> >  #include <linux/input.h>
> >  #include <linux/input/mt.h>
> > @@ -34,6 +35,7 @@ struct goodix_ts_data {
> >  	int abs_y_max;
> >  	unsigned int max_touch_num;
> >  	unsigned int int_trigger_type;
> > +	bool rotated_screen;
> >  };
> >  
> >  #define GOODIX_MAX_HEIGHT		4096
> > @@ -60,6 +62,24 @@ static const unsigned long goodix_irq_flags[] = 
> > {
> >  	IRQ_TYPE_LEVEL_HIGH,
> >  };
> >  
> > +/* Those tablets have their coords origin at the bottom right
> > + * of the tablet, as if rotated 180 degrees */
> 
> /*
>  * Multi
>  * line
>  * comment
>  */
> 
> please.

Would be good if checkpatch could check for that, or is it a personal
request?

> > +static const struct dmi_system_id rotated_screen[] = {
> 
> #if defined(CONFIG_DMI) && defined(CONFIG_X86)

Sure.

> > +	{
> > +		.ident = "WinBook TW100",
> > +		.matches = {
> > +			DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
> > +			DMI_MATCH(DMI_PRODUCT_NAME, "TW100")
> > +		},
> > +		.ident = "WinBook TW700",
> > +		.matches = {
> > +			DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
> > +			DMI_MATCH(DMI_PRODUCT_NAME, "TW100")
> > +		},
> 
> This does not do what you want it to do... First of all you probably
> wanted TW700 on the second entry, second you need separate them into 
> 2
> entries into array (right now it is one still).


Duh!

Thanks, coming in v3 shortly.
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