linux-kernel - Re: [PATCH 08/11] Input: synaptics-rmi4 - f11: use the unified input node if available

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Date:	Thu, 2 Jul 2015 10:50:57 -0700
From:	Andrew Duggan <aduggan@...aptics.com>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Christopher Heiny <cheiny@...aptics.com>,
	Allie Xiong <axiong@...aptics.com>
CC:	Stephen Chandler Paul <cpaul@...hat.com>,
	<benjamin.tissoires@...il.com>, <linux-input@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	Vincent Huang <vincent.huang@...synaptics.com>
Subject: Re: [PATCH 08/11] Input: synaptics-rmi4 - f11: use the unified input
 node if available

On 06/23/2015 12:17 PM, Benjamin Tissoires wrote:
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> ---

Reviewed-by: Andrew Duggan <aduggan@...aptics.com>

>   drivers/input/rmi4/rmi_f11.c | 60 ++++++++++++++++++++++++++------------------
>   1 file changed, 35 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/input/rmi4/rmi_f11.c b/drivers/input/rmi4/rmi_f11.c
> index c3b757b..061530a 100644
> --- a/drivers/input/rmi4/rmi_f11.c
> +++ b/drivers/input/rmi4/rmi_f11.c
> @@ -34,7 +34,6 @@
>   #define DEFAULT_MAX_ABS_MT_ORIENTATION 1
>   #define DEFAULT_MIN_ABS_MT_TRACKING_ID 1
>   #define DEFAULT_MAX_ABS_MT_TRACKING_ID 10
> -#define NAME_BUFFER_SIZE 256
>   #define FUNCTION_NUMBER 0x11
>   
>   /** A note about RMI4 F11 register structure.
> @@ -518,6 +517,7 @@ struct f11_2d_sensor {
>   	u32 type_a;	/* boolean but debugfs API requires u32 */
>   	enum rmi_f11_sensor_type sensor_type;
>   	struct input_dev *input;
> +	bool unified_input;
>   	struct rmi_function *fn;
>   	char input_phys[NAME_BUFFER_SIZE];
>   	u8 report_abs;
> @@ -737,7 +737,8 @@ static void rmi_f11_finger_handler(struct f11_data *f11,
>   	}
>   
>   	input_mt_sync_frame(sensor->input);
> -	input_sync(sensor->input);
> +	if (!sensor->unified_input)
> +		input_sync(sensor->input);
>   }
>   
>   static int f11_2d_construct_data(struct f11_2d_sensor *sensor)
> @@ -1373,35 +1374,42 @@ static int rmi_f11_initialize(struct rmi_function *fn)
>   static int rmi_f11_register_devices(struct rmi_function *fn)
>   {
>   	struct rmi_device *rmi_dev = fn->rmi_dev;
> +	struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
>   	struct f11_data *f11 = dev_get_drvdata(&fn->dev);
>   	struct input_dev *input_dev;
>   	struct rmi_driver *driver = rmi_dev->driver;
>   	struct f11_2d_sensor *sensor = &f11->sensor;
>   	int rc;
>   
> -	input_dev = input_allocate_device();
> +	if (!drv_data->input) {
> +		input_dev = input_allocate_device();
> +	} else {
> +		input_dev = drv_data->input;
> +		sensor->unified_input = true;
> +	}
>   	if (!input_dev) {
>   		rc = -ENOMEM;
>   		goto error_unregister;
>   	}
>   
>   	sensor->input = input_dev;
> -	if (driver->set_input_params) {
> -		rc = driver->set_input_params(rmi_dev, input_dev);
> -		if (rc < 0) {
> -			dev_err(&fn->dev,
> -				"%s: Error in setting input device.\n",
> -				__func__);
> -			goto error_unregister;
> +
> +	if (!sensor->unified_input) {
> +		if (driver->set_input_params) {
> +			rc = driver->set_input_params(rmi_dev, input_dev);
> +			if (rc < 0) {
> +				dev_err(&fn->dev,
> +					"%s: Error in setting input device.\n",
> +					__func__);
> +				goto error_unregister;
> +			}
>   		}
> +		sprintf(sensor->input_phys, "%s.abs/input0",
> +			dev_name(&fn->dev));
> +		input_dev->phys = sensor->input_phys;
> +		input_dev->dev.parent = &rmi_dev->dev;
>   	}
> -	sprintf(sensor->input_phys, "%s.abs/input0",
> -		dev_name(&fn->dev));
> -	input_dev->phys = sensor->input_phys;
> -	input_dev->dev.parent = &rmi_dev->dev;
> -	input_set_drvdata(input_dev, f11);
>   
> -	set_bit(EV_SYN, input_dev->evbit);
>   	set_bit(EV_ABS, input_dev->evbit);
>   	input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
>   
> @@ -1413,19 +1421,21 @@ static int rmi_f11_register_devices(struct rmi_function *fn)
>   		set_bit(REL_X, input_dev->relbit);
>   		set_bit(REL_Y, input_dev->relbit);
>   	}
> -	rc = input_register_device(input_dev);
> -	if (rc) {
> -		input_free_device(input_dev);
> -		sensor->input = NULL;
> -		goto error_unregister;
> +	if (!sensor->unified_input) {
> +		rc = input_register_device(input_dev);
> +		if (rc) {
> +			input_free_device(input_dev);
> +			sensor->input = NULL;
> +			goto error_unregister;
> +		}
>   	}
>   
>   	return 0;
>   
>   error_unregister:
> -	if (f11->sensor.input) {
> -		input_unregister_device(f11->sensor.input);
> -		f11->sensor.input = NULL;
> +	if (!sensor->unified_input && sensor->input) {
> +		input_unregister_device(sensor->input);
> +		sensor->input = NULL;
>   	}
>   
>   	return rc;
> @@ -1525,7 +1535,7 @@ static void rmi_f11_remove(struct rmi_function *fn)
>   {
>   	struct f11_data *f11 = dev_get_drvdata(&fn->dev);
>   
> -	if (f11->sensor.input)
> +	if (!f11->sensor.unified_input && f11->sensor.input)
>   		input_unregister_device(f11->sensor.input);
>   }
>   

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