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Date: Tue, 13 Nov 2012 18:53:09 +0100
From: "Henrik Rydberg" <rydberg@...omail.se>
To: Alexandra Chin <Alexandra.Chin@...synaptics.com>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>,
Linux Kernel <linux-kernel@...r.kernel.org>,
Linux Input <linux-input@...r.kernel.org>,
Linus Walleij <linus.walleij@...ricsson.com>,
Naveen Kumar Gaddipati <naveen.gaddipati@...ricsson.com>,
Mahesh Srinivasan <msrinivasan@...aptics.com>,
Alex Chang <alex.chang@...synaptics.com>,
Scott Lin <scott.lin@...synaptics.com>,
Christopher Heiny <Cheiny@...aptics.com>
Subject: Re: [PATCH v6] staging: ste_rmi4: Convert to Type-B support
Hi Alexandra,
> Convert to MT-B because Synaptics touch devices are capable
> of tracking identifiable fingers.
>
> Signed-off-by: Alexandra Chin <alexandra.chin@...synaptics.com>
> ---
> This patch was tested on Pandaboard.
Thank you for making changes. One minor comment inline, but I am ok
with the patch as is. Looks like we have finally arrived. :-)
Reviewed-by: Henrik Rydberg <rydberg@...omail.se>
Thanks,
Henrik
> ---
> drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c | 76 +++++++++++--------------
> 1 files changed, 33 insertions(+), 43 deletions(-)
>
> diff --git a/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c b/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
> index 277491a..ed304e0 100644
> --- a/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
> +++ b/drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c
> @@ -31,6 +31,7 @@
> #include <linux/interrupt.h>
> #include <linux/regulator/consumer.h>
> #include <linux/module.h>
> +#include <linux/input/mt.h>
> #include "synaptics_i2c_rmi4.h"
>
> /* TODO: for multiple device support will need a per-device mutex */
> @@ -67,7 +68,6 @@
> #define PDT_START_SCAN_LOCATION (0x00E9)
> #define PDT_END_SCAN_LOCATION (0x000A)
> #define PDT_ENTRY_SIZE (0x0006)
> -#define RMI4_NUMBER_OF_MAX_FINGERS (8)
> #define SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM (0x11)
> #define SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM (0x01)
>
> @@ -164,6 +164,7 @@ struct synaptics_rmi4_device_info {
> * @regulator: pointer to the regulator structure
> * @wait: wait queue structure variable
> * @touch_stopped: flag to stop the thread function
> + * @fingers_supported: maximum supported fingers
> *
> * This structure gives the device data information.
> */
> @@ -184,6 +185,7 @@ struct synaptics_rmi4_data {
> struct regulator *regulator;
> wait_queue_head_t wait;
> bool touch_stopped;
> + unsigned char fingers_supported;
> };
>
> /**
> @@ -303,22 +305,21 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
> /* number of touch points - fingers down in this case */
> int touch_count = 0;
> int finger;
> - int fingers_supported;
> int finger_registers;
> int reg;
> int finger_shift;
> int finger_status;
> int retval;
> + int x, y;
> + int wx, wy;
> unsigned short data_base_addr;
> unsigned short data_offset;
> unsigned char data_reg_blk_size;
> unsigned char values[2];
> unsigned char data[DATA_LEN];
> - int x[RMI4_NUMBER_OF_MAX_FINGERS];
> - int y[RMI4_NUMBER_OF_MAX_FINGERS];
> - int wx[RMI4_NUMBER_OF_MAX_FINGERS];
> - int wy[RMI4_NUMBER_OF_MAX_FINGERS];
> + unsigned char fingers_supported = pdata->fingers_supported;
> struct i2c_client *client = pdata->i2c_client;
> + struct input_dev *input_dev = pdata->input_dev;
>
> /* get 2D sensor finger data */
> /*
> @@ -333,7 +334,6 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
> * 10 = finger present but data may not be accurate,
> * 11 = reserved for product use.
> */
> - fingers_supported = rfi->num_of_data_points;
> finger_registers = (fingers_supported + 3)/4;
> data_base_addr = rfi->fn_desc.data_base_addr;
> retval = synaptics_rmi4_i2c_block_read(pdata, data_base_addr, values,
> @@ -358,7 +358,11 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
> * if finger status indicates a finger is present then
> * read the finger data and report it
> */
> - if (finger_status == 1 || finger_status == 2) {
> + input_mt_slot(input_dev, finger);
> + input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
> + finger_status != 0);
> +
> + if (finger_status) {
> /* Read the finger data */
> data_offset = data_base_addr +
> ((finger * data_reg_blk_size) +
> @@ -367,50 +371,33 @@ static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata,
> data_offset, data,
> data_reg_blk_size);
> if (retval != data_reg_blk_size) {
> - printk(KERN_ERR "%s:read data failed\n",
> + dev_err(&client->dev, "%s:read data failed\n",
Still not needed for this patch. Please try to refrain from making
unnecessary changes in the future.
> __func__);
> return 0;
> - } else {
> - x[touch_count] =
> - (data[0] << 4) | (data[2] & MASK_4BIT);
> - y[touch_count] =
> - (data[1] << 4) |
> - ((data[2] >> 4) & MASK_4BIT);
> - wy[touch_count] =
> - (data[3] >> 4) & MASK_4BIT;
> - wx[touch_count] =
> - (data[3] & MASK_4BIT);
> -
> - if (pdata->board->x_flip)
> - x[touch_count] =
> - pdata->sensor_max_x -
> - x[touch_count];
> - if (pdata->board->y_flip)
> - y[touch_count] =
> - pdata->sensor_max_y -
> - y[touch_count];
> }
> + x = (data[0] << 4) | (data[2] & MASK_4BIT);
> + y = (data[1] << 4) | ((data[2] >> 4) & MASK_4BIT);
> + wy = (data[3] >> 4) & MASK_4BIT;
> + wx = (data[3] & MASK_4BIT);
> +
> + if (pdata->board->x_flip)
> + x = pdata->sensor_max_x - x;
> + if (pdata->board->y_flip)
> + y = pdata->sensor_max_y - y;
> +
> + input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
> + max(wx, wy));
> + input_report_abs(input_dev, ABS_MT_POSITION_X, x);
> + input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
> +
> /* number of active touch points */
> touch_count++;
> }
> }
>
> - /* report to input subsystem */
> - if (touch_count) {
> - for (finger = 0; finger < touch_count; finger++) {
> - input_report_abs(pdata->input_dev, ABS_MT_TOUCH_MAJOR,
> - max(wx[finger] , wy[finger]));
> - input_report_abs(pdata->input_dev, ABS_MT_POSITION_X,
> - x[finger]);
> - input_report_abs(pdata->input_dev, ABS_MT_POSITION_Y,
> - y[finger]);
> - input_mt_sync(pdata->input_dev);
> - }
> - } else
> - input_mt_sync(pdata->input_dev);
> -
> /* sync after groups of events */
> - input_sync(pdata->input_dev);
> + input_mt_sync_frame(input_dev);
> + input_sync(input_dev);
> /* return the number of touch points */
> return touch_count;
> }
> @@ -575,6 +562,7 @@ static int synpatics_rmi4_touchpad_detect(struct synaptics_rmi4_data *pdata,
> if ((queries[1] & MASK_3BIT) == 5)
> rfi->num_of_data_points = 10;
> }
> + pdata->fingers_supported = rfi->num_of_data_points;
> /* Need to get interrupt info for handling interrupts */
> rfi->index_to_intr_reg = (interruptcount + 7)/8;
> if (rfi->index_to_intr_reg != 0)
> @@ -988,6 +976,8 @@ static int __devinit synaptics_rmi4_probe
> rmi4_data->sensor_max_y, 0, 0);
> input_set_abs_params(rmi4_data->input_dev, ABS_MT_TOUCH_MAJOR, 0,
> MAX_TOUCH_MAJOR, 0, 0);
> + input_mt_init_slots(rmi4_data->input_dev,
> + rmi4_data->fingers_supported, 0);
>
> /* Clear interrupts */
> synaptics_rmi4_i2c_block_read(rmi4_data,
> --
> 1.7.5.4
>
--
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