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Date:	Wed, 23 Jul 2014 18:41:35 -0700
From:	Christopher Heiny <cheiny@...aptics.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	<linux-input@...r.kernel.org>
CC:	Andrew Duggan <aduggan@...aptics.com>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Input: synaptics-rmi4 - fix compiler warnings in F11

On 07/22/2014 11:11 PM, Dmitry Torokhov wrote:
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

I've reviewed this, and can say:

Acked-by: Christopher Heiny <cheiny@...aptics.com>

but I haven't had a chance to apply it to my build tree.

Andrew - I'll be OOO for a couple of days.  Can you do that, and add a 
Tested-by: or rev the patch, as appropriate?

				Thanks,
					Chris

> ---
>   drivers/input/rmi4/rmi_f11.c | 135 +++++++++++++++++++++++--------------------
>   1 file changed, 71 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/input/rmi4/rmi_f11.c b/drivers/input/rmi4/rmi_f11.c
> index b739d31..7af4f68 100644
> --- a/drivers/input/rmi4/rmi_f11.c
> +++ b/drivers/input/rmi4/rmi_f11.c
> @@ -553,7 +553,7 @@ struct f11_data {
>   	unsigned long *result_bits;
>   };
>
> -enum finger_state_values {
> +enum f11_finger_state {
>   	F11_NO_FINGER	= 0x00,
>   	F11_PRESENT	= 0x01,
>   	F11_INACCURATE	= 0x02,
> @@ -563,12 +563,14 @@ enum finger_state_values {
>   /** F11_INACCURATE state is overloaded to indicate pen present. */
>   #define F11_PEN F11_INACCURATE
>
> -static int get_tool_type(struct f11_2d_sensor *sensor, u8 finger_state)
> +static int rmi_f11_get_tool_type(struct f11_2d_sensor *sensor,
> +				 enum f11_finger_state finger_state)
>   {
>   	if (IS_ENABLED(CONFIG_RMI4_F11_PEN) &&
>   			sensor->sens_query.has_pen &&
>   			finger_state == F11_PEN)
>   		return MT_TOOL_PEN;
> +
>   	return MT_TOOL_FINGER;
>   }
>
> @@ -603,36 +605,32 @@ static void rmi_f11_rel_pos_report(struct f11_2d_sensor *sensor, u8 n_finger)
>
>   static void rmi_f11_abs_pos_report(struct f11_data *f11,
>   				   struct f11_2d_sensor *sensor,
> -				   u8 finger_state, u8 n_finger)
> +				   enum f11_finger_state finger_state,
> +				   u8 n_finger)
>   {
>   	struct f11_2d_data *data = &sensor->data;
> +	struct input_dev *input = sensor->input;
>   	struct rmi_f11_2d_axis_alignment *axis_align = &sensor->axis_align;
> +	u8 *pos_data = &data->abs_pos[n_finger * RMI_F11_ABS_BYTES];
>   	u16 x, y, z;
>   	int w_x, w_y, w_max, w_min, orient;
> -	int temp;
> -	u8 abs_base = n_finger * RMI_F11_ABS_BYTES;
> +	int tool_type = rmi_f11_get_tool_type(sensor, finger_state);
> +
> +	if (sensor->type_a) {
> +		input_report_abs(input, ABS_MT_TRACKING_ID, n_finger);
> +		input_report_abs(input, ABS_MT_TOOL_TYPE, tool_type);
> +	} else {
> +		input_mt_slot(input, n_finger);
> +		input_mt_report_slot_state(input, tool_type,
> +					   finger_state != F11_NO_FINGER);
> +	}
>
>   	if (finger_state) {
> -		x = (data->abs_pos[abs_base] << 4) |
> -			(data->abs_pos[abs_base + 2] & 0x0F);
> -		y = (data->abs_pos[abs_base + 1] << 4) |
> -			(data->abs_pos[abs_base + 2] >> 4);
> -		w_x = data->abs_pos[abs_base + 3] & 0x0F;
> -		w_y = data->abs_pos[abs_base + 3] >> 4;
> -		w_max = max(w_x, w_y);
> -		w_min = min(w_x, w_y);
> -		z = data->abs_pos[abs_base + 4];
> -
> -		if (axis_align->swap_axes) {
> -			temp = x;
> -			x = y;
> -			y = temp;
> -			temp = w_x;
> -			w_x = w_y;
> -			w_y = temp;
> -		}
> +		x = (pos_data[0] << 4) | (pos_data[2] & 0x0F);
> +		y = (pos_data[1] << 4) | (pos_data[2] >> 4);
>
> -		orient = w_x > w_y ? 1 : 0;
> +		if (axis_align->swap_axes)
> +			swap(x, y);
>
>   		if (axis_align->flip_x)
>   			x = max(sensor->max_x - x, 0);
> @@ -641,13 +639,13 @@ static void rmi_f11_abs_pos_report(struct f11_data *f11,
>   			y = max(sensor->max_y - y, 0);
>
>   		/*
> -		* here checking if X offset or y offset are specified is
> -		*  redundant.  We just add the offsets or, clip the values
> -		*
> -		* note: offsets need to be done before clipping occurs,
> -		* or we could get funny values that are outside
> -		* clipping boundaries.
> -		*/
> +		 * Here checking if X offset or y offset are specified is
> +		 * redundant. We just add the offsets or clip the values.
> +		 *
> +		 * Note: offsets need to be applied before clipping occurs,
> +		 * or we could get funny values that are outside of
> +		 * clipping boundaries.
> +		 */
>   		x += axis_align->offset_x;
>   		y += axis_align->offset_y;
>   		x =  max(axis_align->clip_x_low, x);
> @@ -657,41 +655,44 @@ static void rmi_f11_abs_pos_report(struct f11_data *f11,
>   		if (axis_align->clip_y_high)
>   			y =  min(axis_align->clip_y_high, y);
>
> -	}
> +		w_x = pos_data[3] & 0x0f;
> +		w_y = pos_data[3] >> 4;
>
> -	/* Some UIs ignore W of zero, so we fudge it to 1 for pens.  This
> -	 * only appears to be an issue when reporting pens, not plain old
> -	 * fingers. */
> -	if (IS_ENABLED(CONFIG_RMI4_F11_PEN) &&
> -			get_tool_type(sensor, finger_state) == MT_TOOL_PEN) {
> -		w_max = max(1, w_max);
> -		w_min = max(1, w_min);
> -	}
> +		if (axis_align->swap_axes)
> +			swap(w_x, w_y);
>
> -	if (sensor->type_a) {
> -		input_report_abs(sensor->input, ABS_MT_TRACKING_ID, n_finger);
> -		input_report_abs(sensor->input, ABS_MT_TOOL_TYPE,
> -					get_tool_type(sensor, finger_state));
> -	} else {
> -		input_mt_slot(sensor->input, n_finger);
> -		input_mt_report_slot_state(sensor->input,
> -			get_tool_type(sensor, finger_state), finger_state);
> -	}
> +		orient = w_x > w_y ? 1 : 0;
> +
> +		w_max = max(w_x, w_y);
> +		w_min = min(w_x, w_y);
> +
> +		/*
> +		 * Some UIs ignore W of zero, so we fudge it to 1 for pens.  This
> +		 * only appears to be an issue when reporting pens, not plain old
> +		 * fingers.
> +		 */
> +		if (tool_type == MT_TOOL_PEN) {
> +			w_max = max(1, w_max);
> +			w_min = max(1, w_min);
> +		}
> +
> +		z = pos_data[4];
> +
> +		input_report_abs(input, ABS_MT_PRESSURE, z);
> +		input_report_abs(input, ABS_MT_TOUCH_MAJOR, w_max);
> +		input_report_abs(input, ABS_MT_TOUCH_MINOR, w_min);
> +		input_report_abs(input, ABS_MT_ORIENTATION, orient);
> +		input_report_abs(input, ABS_MT_POSITION_X, x);
> +		input_report_abs(input, ABS_MT_POSITION_Y, y);
>
> -	if (finger_state) {
> -		input_report_abs(sensor->input, ABS_MT_PRESSURE, z);
> -		input_report_abs(sensor->input, ABS_MT_TOUCH_MAJOR, w_max);
> -		input_report_abs(sensor->input, ABS_MT_TOUCH_MINOR, w_min);
> -		input_report_abs(sensor->input, ABS_MT_ORIENTATION, orient);
> -		input_report_abs(sensor->input, ABS_MT_POSITION_X, x);
> -		input_report_abs(sensor->input, ABS_MT_POSITION_Y, y);
>   		dev_dbg(&sensor->fn->dev,
>   			"finger[%d]:%d - x:%d y:%d z:%d w_max:%d w_min:%d\n",
>   			n_finger, finger_state, x, y, z, w_max, w_min);
>   	}
> +
>   	/* MT sync between fingers */
>   	if (sensor->type_a)
> -		input_mt_sync(sensor->input);
> +		input_mt_sync(input);
>   }
>
>   static void rmi_f11_finger_handler(struct f11_data *f11,
> @@ -710,25 +711,31 @@ static void rmi_f11_finger_handler(struct f11_data *f11,
>   		/* Possible of having 4 fingers per f_statet register */
>   		finger_state = (f_state[i / 4] >> (2 * (i % 4))) &
>   					FINGER_STATE_MASK;
> -		if (finger_state == F11_RESERVED) {
> -			pr_err("%s: Invalid finger state[%d]:0x%02x.", __func__,
> -					i, finger_state);
> +		switch (finger_state) {
> +		case F11_RESERVED:
> +			pr_err("Invalid finger state[%d]: 0x%02x", i, finger_state);
>   			continue;
> -		} else if ((finger_state == F11_PRESENT) ||
> -				(finger_state == F11_INACCURATE)) {
> +
> +		case F11_PRESENT:
> +		case F11_INACCURATE:
>   			finger_pressed_count++;
> +			break;
> +
> +		case F11_NO_FINGER:
> +			break;
>   		}
>
>   		abs_bits = bitmap_and(f11->result_bits, irq_bits, f11->abs_mask,
> -				num_irq_regs);
> +				      num_irq_regs);
>   		if (abs_bits)
>   			rmi_f11_abs_pos_report(f11, sensor, finger_state, i);
>
>   		rel_bits = bitmap_and(f11->result_bits, irq_bits, f11->rel_mask,
> -				num_irq_regs);
> +				      num_irq_regs);
>   		if (rel_bits)
>   			rmi_f11_rel_pos_report(sensor, i);
>   	}
> +
>   	input_mt_sync_frame(sensor->input);
>   	input_sync(sensor->input);
>   }
>


-- 

Christopher Heiny
Senior Staff Firmware Engineer
Synaptics Incorporated
--
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