linux-kernel - Re: [PATCH 3/6] input: elants: support common touchscreen DT properties

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Message-ID: <20191210023818.GB15246@qmqm.qmqm.pl>
Date:   Tue, 10 Dec 2019 03:38:18 +0100
From:   Michał Mirosław <mirq-linux@...e.qmqm.pl>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     linux-input@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] input: elants: support common touchscreen DT
 properties

On Tue, Dec 10, 2019 at 04:03:18AM +0300, Dmitry Osipenko wrote:
> 10.12.2019 03:19, Michał Mirosław пишет:
> > Support common DT properties like axis inversions to complement
> > information obtained from device's firmware.a
[...]
> > @@ -498,10 +498,10 @@ static int elants_i2c_query_ts_info(struct elants_data *ts)
> >  			 rows, cols, osr);
> >  	} else {
> >  		/* translate trace number to TS resolution */
> > -		ts->x_max = ELAN_TS_RESOLUTION(rows, osr);
> > -		ts->x_res = DIV_ROUND_CLOSEST(ts->x_max, phy_x);
> > -		ts->y_max = ELAN_TS_RESOLUTION(cols, osr);
> > -		ts->y_res = DIV_ROUND_CLOSEST(ts->y_max, phy_y);
> > +		ts->prop.max_x = ELAN_TS_RESOLUTION(rows, osr);
> > +		ts->x_res = DIV_ROUND_CLOSEST(ts->prop.max_x, phy_x);
> > +		ts->prop.max_y = ELAN_TS_RESOLUTION(cols, osr);
> > +		ts->y_res = DIV_ROUND_CLOSEST(ts->prop.max_y, phy_y);
> >  	}
> >  
> >  	return 0;
> > @@ -833,8 +833,7 @@ static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf,
> >  
> >  			input_mt_slot(input, i);
> >  			input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
> > -			input_event(input, EV_ABS, ABS_MT_POSITION_X, x);
> > -			input_event(input, EV_ABS, ABS_MT_POSITION_Y, y);
> > +			touchscreen_report_pos(input, &ts->prop, x, y, true);
> >  			input_event(input, EV_ABS, ABS_MT_PRESSURE, p);
> >  			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, w);
> >  
> > @@ -1251,13 +1250,15 @@ static int elants_i2c_probe(struct i2c_client *client,
> >  	ts->input->name = "Elan Touchscreen";
> >  	ts->input->id.bustype = BUS_I2C;
> >  
> > +	touchscreen_parse_properties(ts->input, true, &ts->prop);
> 
> Shouldn't this function be invoked after setting the max x/y sizes with
> the hardware values? That's what all other drivers do and then you won't
> need to set the ts->prop.max_x/y above in the code.

This is done later in the series - this patch only adds axis inversion
support and ignores DT-provided sizes.

Best Regards,
Michał Mirosław