[PATCH 1/2] Input: goodix - Add support for touch-keys and keycode mapping

Subsystems: goodix touchscreen, input (keyboard, mouse, joystick, touchscreen) drivers, the rest

STALE2370d

6 messages, 2 authors, 2020-03-10 · open the first message on its own page

[PATCH 1/2] Input: goodix - Add support for touch-keys and keycode mapping

From: Dmitry Mastykin <hidden>
Date: 2020-03-10 14:17:15

KEY_LEFTMETA is assigned to the first touch-key (it will be the default
keycode for devices with a single touch-key).
KEY_F1, KEY_F2... are assigned to other touch-keys.
One may assign any keycodes via HWDB.

Previous press/release behavior has changed.
Before: both press/release events were generated on key touch.
Now: press/release events correspond to real touch and release now.

Signed-off-by: Dmitry Mastykin <redacted>
---
 drivers/input/touchscreen/goodix.c | 54 ++++++++++++++++++++++++------
 1 file changed, 44 insertions(+), 10 deletions(-)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index fdec508..6a7ecc6 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -38,6 +38,7 @@
 #define GOODIX_CONTACT_SIZE		8
 #define GOODIX_MAX_CONTACT_SIZE		9
 #define GOODIX_MAX_CONTACTS		10
+#define GOODIX_MAX_KEYS			7
 
 #define GOODIX_CONFIG_MIN_LENGTH	186
 #define GOODIX_CONFIG_911_LENGTH	186
@@ -55,6 +56,7 @@
 #define GOODIX_REG_ID			0x8140
 
 #define GOODIX_BUFFER_STATUS_READY	BIT(7)
+#define GOODIX_HAVE_KEY			BIT(4)
 #define GOODIX_BUFFER_STATUS_TIMEOUT	20
 
 #define RESOLUTION_LOC		1
@@ -100,6 +102,7 @@ struct goodix_ts_data {
 	enum goodix_irq_pin_access_method irq_pin_access_method;
 	unsigned int contact_size;
 	u8 config[GOODIX_CONFIG_MAX_LENGTH];
+	unsigned short keymap[GOODIX_MAX_KEYS];
 };
 
 static int goodix_check_cfg_8(struct goodix_ts_data *ts,
@@ -285,8 +288,14 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
 	 */
 	max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT);
 	do {
+		/*
+		 * We are going to read ts->contact_size * max(1, touch_num) + 2
+		 * bytes, where + 2 consists of reading 1 extra byte for the
+		 * header + 1 extra byte for the footer which contains the
+		 * touch-key code.
+		 */
 		error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR,
-					data, ts->contact_size + 1);
+					data, ts->contact_size + 2);
 		if (error) {
 			dev_err(&ts->client->dev, "I2C transfer error: %d\n",
 					error);
@@ -299,10 +308,10 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
 				return -EPROTO;
 
 			if (touch_num > 1) {
-				data += 1 + ts->contact_size;
+				data += 2 + ts->contact_size;
 				error = goodix_i2c_read(ts->client,
 						GOODIX_READ_COOR_ADDR +
-							1 + ts->contact_size,
+							2 + ts->contact_size,
 						data,
 						ts->contact_size *
 							(touch_num - 1));
@@ -353,6 +362,23 @@ static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
 	input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
 }
 
+static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data)
+{
+	int touch_num;
+	u8 key_value;
+	int i;
+
+	if (data[0] & GOODIX_HAVE_KEY) {
+		touch_num = data[0] & 0x0f;
+		key_value = data[1 + ts->contact_size * touch_num];
+		for (i = 0; i < GOODIX_MAX_KEYS; ++i)
+			if (key_value & (1 << i))
+				input_report_key(ts->input_dev, ts->keymap[i], 1);
+	} else
+		for (i = 0; i < GOODIX_MAX_KEYS; ++i)
+			input_report_key(ts->input_dev, ts->keymap[i], 0);
+}
+
 /**
  * goodix_process_events - Process incoming events
  *
@@ -363,7 +389,7 @@ static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
  */
 static void goodix_process_events(struct goodix_ts_data *ts)
 {
-	u8  point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
+	u8  point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
 	int touch_num;
 	int i;
 
@@ -371,11 +397,7 @@ static void goodix_process_events(struct goodix_ts_data *ts)
 	if (touch_num < 0)
 		return;
 
-	/*
-	 * Bit 4 of the first byte reports the status of the capacitive
-	 * Windows/Home button.
-	 */
-	input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4));
+	goodix_ts_report_key(ts, point_data);
 
 	for (i = 0; i < touch_num; i++)
 		if (ts->contact_size == 9)
@@ -961,6 +983,7 @@ static int goodix_i2c_test(struct i2c_client *client)
 static int goodix_configure_dev(struct goodix_ts_data *ts)
 {
 	int error;
+	int i;
 
 	ts->int_trigger_type = GOODIX_INT_TRIGGER;
 	ts->max_touch_num = GOODIX_MAX_CONTACTS;
@@ -978,8 +1001,19 @@ static int goodix_configure_dev(struct goodix_ts_data *ts)
 	ts->input_dev->id.product = ts->id;
 	ts->input_dev->id.version = ts->version;
 
+	ts->input_dev->keycode = ts->keymap;
+	ts->input_dev->keycodesize = sizeof(ts->keymap[0]);
+	ts->input_dev->keycodemax = GOODIX_MAX_KEYS;
+
 	/* Capacitive Windows/Home button on some devices */
-	input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA);
+	for (i = 0; i < GOODIX_MAX_KEYS; ++i) {
+		if (i == 0)
+			ts->keymap[i] = KEY_LEFTMETA;
+		else
+			ts->keymap[i] = KEY_F1 + (i - 1);
+
+		input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]);
+	}
 
 	input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
 	input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
-- 
2.23.0

[PATCH 2/2] Input: goodix - Ignore spurious interrupts

From: Dmitry Mastykin <hidden>
Date: 2020-03-10 14:17:17

Signed-off-by: Dmitry Mastykin <redacted>
---
 drivers/input/touchscreen/goodix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 6a7ecc6..7f8ad6d 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -329,7 +329,7 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
 	 * The Goodix panel will send spurious interrupts after a
 	 * 'finger up' event, which will always cause a timeout.
 	 */
-	return 0;
+	return -ENOMSG;
 }
 
 static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data)
-- 
2.23.0

Re: [PATCH 1/2] Input: goodix - Add support for touch-keys and keycode mapping

From: Hans de Goede <hidden>
Date: 2020-03-10 14:40:55

Hi,

Thank you for your patches.

On 3/10/20 2:17 PM, Dmitry Mastykin wrote:
KEY_LEFTMETA is assigned to the first touch-key (it will be the default
keycode for devices with a single touch-key).
KEY_F1, KEY_F2... are assigned to other touch-keys.
One may assign any keycodes via HWDB.
I think the commit message could use some work, e.g. something like this:

###

Subj: Input: goodix - Add support for more then one touch-key

Some devices with a goodix touchscreen have more then 1 capacitive
touch-key. This commit replaces the current support for a single
touch-key, which ignored the reported key-code. With support for
up to 7 touch-keys, based upon checking the key-code which is
post-fixed to any reported touch-data.

KEY_LEFTMETA is assigned to the first touch-key (it will still be
the default keycode for devices with a single touch-key).
KEY_F1, KEY_F2... are assigned as default keycode for the other
touch-keys.

This commit also add supports for keycode remapping, so that
systemd-udev's hwdb can be used to remap the codes to send
keycodes to match the icons on the buttons for devices with more
then 1 touch-key.

###
Previous press/release behavior has changed.
Before: both press/release events were generated on key touch.
Now: press/release events correspond to real touch and release now.
Looking at the old code I do not think that this is correct,
the old code keeps reporting KEY_LEFTMETA as pressed as long as
the GOODIX_HAVE_KEY is set. I guess the undesirable behavior you
describe here was the result of an earlier version of your
patch to support more then one touch key.
Signed-off-by: Dmitry Mastykin <redacted>
Other then the remarks about the commit message this looks
good to me.

Regards,

Hans

quoted hunk
---
  drivers/input/touchscreen/goodix.c | 54 ++++++++++++++++++++++++------
  1 file changed, 44 insertions(+), 10 deletions(-)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index fdec508..6a7ecc6 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -38,6 +38,7 @@
  #define GOODIX_CONTACT_SIZE		8
  #define GOODIX_MAX_CONTACT_SIZE		9
  #define GOODIX_MAX_CONTACTS		10
+#define GOODIX_MAX_KEYS			7
  
  #define GOODIX_CONFIG_MIN_LENGTH	186
  #define GOODIX_CONFIG_911_LENGTH	186
@@ -55,6 +56,7 @@
  #define GOODIX_REG_ID			0x8140
  
  #define GOODIX_BUFFER_STATUS_READY	BIT(7)
+#define GOODIX_HAVE_KEY			BIT(4)
  #define GOODIX_BUFFER_STATUS_TIMEOUT	20
  
  #define RESOLUTION_LOC		1
@@ -100,6 +102,7 @@ struct goodix_ts_data {
  	enum goodix_irq_pin_access_method irq_pin_access_method;
  	unsigned int contact_size;
  	u8 config[GOODIX_CONFIG_MAX_LENGTH];
+	unsigned short keymap[GOODIX_MAX_KEYS];
  };
  
  static int goodix_check_cfg_8(struct goodix_ts_data *ts,
@@ -285,8 +288,14 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
  	 */
  	max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT);
  	do {
+		/*
+		 * We are going to read ts->contact_size * max(1, touch_num) + 2
+		 * bytes, where + 2 consists of reading 1 extra byte for the
+		 * header + 1 extra byte for the footer which contains the
+		 * touch-key code.
+		 */
  		error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR,
-					data, ts->contact_size + 1);
+					data, ts->contact_size + 2);
  		if (error) {
  			dev_err(&ts->client->dev, "I2C transfer error: %d\n",
  					error);
@@ -299,10 +308,10 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
  				return -EPROTO;
  
  			if (touch_num > 1) {
-				data += 1 + ts->contact_size;
+				data += 2 + ts->contact_size;
  				error = goodix_i2c_read(ts->client,
  						GOODIX_READ_COOR_ADDR +
-							1 + ts->contact_size,
+							2 + ts->contact_size,
  						data,
  						ts->contact_size *
  							(touch_num - 1));
@@ -353,6 +362,23 @@ static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
  	input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
  }
  
+static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data)
+{
+	int touch_num;
+	u8 key_value;
+	int i;
+
+	if (data[0] & GOODIX_HAVE_KEY) {
+		touch_num = data[0] & 0x0f;
+		key_value = data[1 + ts->contact_size * touch_num];
+		for (i = 0; i < GOODIX_MAX_KEYS; ++i)
+			if (key_value & (1 << i))
+				input_report_key(ts->input_dev, ts->keymap[i], 1);
+	} else
+		for (i = 0; i < GOODIX_MAX_KEYS; ++i)
+			input_report_key(ts->input_dev, ts->keymap[i], 0);
+}
+
  /**
   * goodix_process_events - Process incoming events
   *
@@ -363,7 +389,7 @@ static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
   */
  static void goodix_process_events(struct goodix_ts_data *ts)
  {
-	u8  point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
+	u8  point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
  	int touch_num;
  	int i;
  
@@ -371,11 +397,7 @@ static void goodix_process_events(struct goodix_ts_data *ts)
  	if (touch_num < 0)
  		return;
  
-	/*
-	 * Bit 4 of the first byte reports the status of the capacitive
-	 * Windows/Home button.
-	 */
-	input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4));
+	goodix_ts_report_key(ts, point_data);
  
  	for (i = 0; i < touch_num; i++)
  		if (ts->contact_size == 9)
@@ -961,6 +983,7 @@ static int goodix_i2c_test(struct i2c_client *client)
  static int goodix_configure_dev(struct goodix_ts_data *ts)
  {
  	int error;
+	int i;
  
  	ts->int_trigger_type = GOODIX_INT_TRIGGER;
  	ts->max_touch_num = GOODIX_MAX_CONTACTS;
@@ -978,8 +1001,19 @@ static int goodix_configure_dev(struct goodix_ts_data *ts)
  	ts->input_dev->id.product = ts->id;
  	ts->input_dev->id.version = ts->version;
  
+	ts->input_dev->keycode = ts->keymap;
+	ts->input_dev->keycodesize = sizeof(ts->keymap[0]);
+	ts->input_dev->keycodemax = GOODIX_MAX_KEYS;
+
  	/* Capacitive Windows/Home button on some devices */
-	input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA);
+	for (i = 0; i < GOODIX_MAX_KEYS; ++i) {
+		if (i == 0)
+			ts->keymap[i] = KEY_LEFTMETA;
+		else
+			ts->keymap[i] = KEY_F1 + (i - 1);
+
+		input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]);
+	}
  
  	input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
  	input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);

Re: [PATCH 2/2] Input: goodix - Ignore spurious interrupts

From: Hans de Goede <hidden>
Date: 2020-03-10 14:55:42

Hi,

On 3/10/20 2:17 PM, Dmitry Mastykin wrote:

This patch completely lacks a "body" for the commit message,
please write a paragraph about why you are making this change
here.

Regards,

Hans

quoted hunk
Signed-off-by: Dmitry Mastykin <redacted>
---
  drivers/input/touchscreen/goodix.c | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 6a7ecc6..7f8ad6d 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -329,7 +329,7 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
  	 * The Goodix panel will send spurious interrupts after a
  	 * 'finger up' event, which will always cause a timeout.
  	 */
-	return 0;
+	return -ENOMSG;
  }
  
  static void goodix_ts_report_touch_8b(struct goodix_ts_data *ts, u8 *coor_data)

Re: [PATCH 1/2] Input: goodix - Add support for touch-keys and keycode mapping

From: Dmitry Mastykin <hidden>
Date: 2020-03-10 15:30:02

Hi Hans,

thank you for the suggested ideas for the patches, reviewing them, and 
for suggested commit message in the last mail.

Should I change patch to v2 after correcting the commit message?

 >> Previous press/release behavior has changed.
 >> Before: both press/release events were generated on key touch.
 >> Now: press/release events correspond to real touch and release now.
 >
 > Looking at the old code I do not think that this is correct,
 > the old code keeps reporting KEY_LEFTMETA as pressed as long as
 > the GOODIX_HAVE_KEY is set. I guess the undesirable behavior you
 > describe here was the result of an earlier version of your
 > patch to support more then one touch key.
 >
I've just tested the old code: it has wrong behavior. And the patch 2/2 
("Input: goodix - Ignore spurious interrupts", 2020-03-10) makes it correct.

Kind regards
Dmitry Mastykin


On 3/10/20 5:40 PM, Hans de Goede wrote:
 > Hi,
 >
 > Thank you for your patches.
 >
 > On 3/10/20 2:17 PM, Dmitry Mastykin wrote:
 >> KEY_LEFTMETA is assigned to the first touch-key (it will be the default
 >> keycode for devices with a single touch-key).
 >> KEY_F1, KEY_F2... are assigned to other touch-keys.
 >> One may assign any keycodes via HWDB.
 >
 > I think the commit message could use some work, e.g. something like this:
 >
 > ###
 >
 > Subj: Input: goodix - Add support for more then one touch-key
 >
 > Some devices with a goodix touchscreen have more then 1 capacitive
 > touch-key. This commit replaces the current support for a single
 > touch-key, which ignored the reported key-code. With support for
 > up to 7 touch-keys, based upon checking the key-code which is
 > post-fixed to any reported touch-data.
 >
 > KEY_LEFTMETA is assigned to the first touch-key (it will still be
 > the default keycode for devices with a single touch-key).
 > KEY_F1, KEY_F2... are assigned as default keycode for the other
 > touch-keys.
 >
 > This commit also add supports for keycode remapping, so that
 > systemd-udev's hwdb can be used to remap the codes to send
 > keycodes to match the icons on the buttons for devices with more
 > then 1 touch-key.
 >
 > ###
 >
 >> Previous press/release behavior has changed.
 >> Before: both press/release events were generated on key touch.
 >> Now: press/release events correspond to real touch and release now.
 >
 > Looking at the old code I do not think that this is correct,
 > the old code keeps reporting KEY_LEFTMETA as pressed as long as
 > the GOODIX_HAVE_KEY is set. I guess the undesirable behavior you
 > describe here was the result of an earlier version of your
 > patch to support more then one touch key.
 >
 >> Signed-off-by: Dmitry Mastykin [off-list ref]
 >
 > Other then the remarks about the commit message this looks
 > good to me.
 >
 > Regards,
 >
 > Hans
 >
 >
 >> ---
 >>   drivers/input/touchscreen/goodix.c | 54 ++++++++++++++++++++++++------
 >>   1 file changed, 44 insertions(+), 10 deletions(-)
 >>
 >> diff --git a/drivers/input/touchscreen/goodix.c 
b/drivers/input/touchscreen/goodix.c
 >> index fdec508..6a7ecc6 100644
 >> --- a/drivers/input/touchscreen/goodix.c
 >> +++ b/drivers/input/touchscreen/goodix.c
 >> @@ -38,6 +38,7 @@
 >>   #define GOODIX_CONTACT_SIZE        8
 >>   #define GOODIX_MAX_CONTACT_SIZE        9
 >>   #define GOODIX_MAX_CONTACTS        10
 >> +#define GOODIX_MAX_KEYS            7
 >>   #define GOODIX_CONFIG_MIN_LENGTH    186
 >>   #define GOODIX_CONFIG_911_LENGTH    186
 >> @@ -55,6 +56,7 @@
 >>   #define GOODIX_REG_ID            0x8140
 >>   #define GOODIX_BUFFER_STATUS_READY    BIT(7)
 >> +#define GOODIX_HAVE_KEY            BIT(4)
 >>   #define GOODIX_BUFFER_STATUS_TIMEOUT    20
 >>   #define RESOLUTION_LOC        1
 >> @@ -100,6 +102,7 @@ struct goodix_ts_data {
 >>       enum goodix_irq_pin_access_method irq_pin_access_method;
 >>       unsigned int contact_size;
 >>       u8 config[GOODIX_CONFIG_MAX_LENGTH];
 >> +    unsigned short keymap[GOODIX_MAX_KEYS];
 >>   };
 >>   static int goodix_check_cfg_8(struct goodix_ts_data *ts,
 >> @@ -285,8 +288,14 @@ static int goodix_ts_read_input_report(struct 
goodix_ts_data *ts, u8 *data)
 >>        */
 >>       max_timeout = jiffies + 
msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT);
 >>       do {
 >> +        /*
 >> +         * We are going to read ts->contact_size * max(1, 
touch_num) + 2
 >> +         * bytes, where + 2 consists of reading 1 extra byte for the
 >> +         * header + 1 extra byte for the footer which contains the
 >> +         * touch-key code.
 >> +         */
 >>           error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR,
 >> -                    data, ts->contact_size + 1);
 >> +                    data, ts->contact_size + 2);
 >>           if (error) {
 >>               dev_err(&ts->client->dev, "I2C transfer error: %d\n",
 >>                       error);
 >> @@ -299,10 +308,10 @@ static int goodix_ts_read_input_report(struct 
goodix_ts_data *ts, u8 *data)
 >>                   return -EPROTO;
 >>               if (touch_num > 1) {
 >> -                data += 1 + ts->contact_size;
 >> +                data += 2 + ts->contact_size;
 >>                   error = goodix_i2c_read(ts->client,
 >>                           GOODIX_READ_COOR_ADDR +
 >> -                            1 + ts->contact_size,
 >> +                            2 + ts->contact_size,
 >>                           data,
 >>                           ts->contact_size *
 >>                               (touch_num - 1));
 >> @@ -353,6 +362,23 @@ static void goodix_ts_report_touch_9b(struct 
goodix_ts_data *ts, u8 *coor_data)
 >>       input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
 >>   }
 >> +static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data)
 >> +{
 >> +    int touch_num;
 >> +    u8 key_value;
 >> +    int i;
 >> +
 >> +    if (data[0] & GOODIX_HAVE_KEY) {
 >> +        touch_num = data[0] & 0x0f;
 >> +        key_value = data[1 + ts->contact_size * touch_num];
 >> +        for (i = 0; i < GOODIX_MAX_KEYS; ++i)
 >> +            if (key_value & (1 << i))
 >> +                input_report_key(ts->input_dev, ts->keymap[i], 1);
 >> +    } else
 >> +        for (i = 0; i < GOODIX_MAX_KEYS; ++i)
 >> +            input_report_key(ts->input_dev, ts->keymap[i], 0);
 >> +}
 >> +
 >>   /**
 >>    * goodix_process_events - Process incoming events
 >>    *
 >> @@ -363,7 +389,7 @@ static void goodix_ts_report_touch_9b(struct 
goodix_ts_data *ts, u8 *coor_data)
 >>    */
 >>   static void goodix_process_events(struct goodix_ts_data *ts)
 >>   {
 >> -    u8  point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
 >> +    u8  point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
 >>       int touch_num;
 >>       int i;
 >> @@ -371,11 +397,7 @@ static void goodix_process_events(struct 
goodix_ts_data *ts)
 >>       if (touch_num < 0)
 >>           return;
 >> -    /*
 >> -     * Bit 4 of the first byte reports the status of the capacitive
 >> -     * Windows/Home button.
 >> -     */
 >> -    input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & 
BIT(4));
 >> +    goodix_ts_report_key(ts, point_data);
 >>       for (i = 0; i < touch_num; i++)
 >>           if (ts->contact_size == 9)
 >> @@ -961,6 +983,7 @@ static int goodix_i2c_test(struct i2c_client 
*client)
 >>   static int goodix_configure_dev(struct goodix_ts_data *ts)
 >>   {
 >>       int error;
 >> +    int i;
 >>       ts->int_trigger_type = GOODIX_INT_TRIGGER;
 >>       ts->max_touch_num = GOODIX_MAX_CONTACTS;
 >> @@ -978,8 +1001,19 @@ static int goodix_configure_dev(struct 
goodix_ts_data *ts)
 >>       ts->input_dev->id.product = ts->id;
 >>       ts->input_dev->id.version = ts->version;
 >> +    ts->input_dev->keycode = ts->keymap;
 >> +    ts->input_dev->keycodesize = sizeof(ts->keymap[0]);
 >> +    ts->input_dev->keycodemax = GOODIX_MAX_KEYS;
 >> +
 >>       /* Capacitive Windows/Home button on some devices */
 >> -    input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA);
 >> +    for (i = 0; i < GOODIX_MAX_KEYS; ++i) {
 >> +        if (i == 0)
 >> +            ts->keymap[i] = KEY_LEFTMETA;
 >> +        else
 >> +            ts->keymap[i] = KEY_F1 + (i - 1);
 >> +
 >> +        input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]);
 >> +    }
 >>       input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
 >>       input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
 >>
 >

Re: [PATCH 1/2] Input: goodix - Add support for touch-keys and keycode mapping

From: Hans de Goede <hidden>
Date: 2020-03-10 15:37:23

Hi,

On 3/10/20 4:29 PM, Dmitry Mastykin wrote:
Hi Hans,

thank you for the suggested ideas for the patches, reviewing them, and for suggested commit message in the last mail.
You're welcome.
Should I change patch to v2 after correcting the commit message?
Yes the normal way to do this is to use:

git send-email --subject-prefix="PATCH v2" ...

When sending and add a changelog to the commit message after your
Signed-off-by, like this:

Signed-off-by: ...
---
Changes in v2:
- Improve commit message

When Dmitry Torokhov then applies these patches, git am will
automatically remove the changelog (which is mainly for reviewing
purposes) because it ignores everything after the first '---' line.

Regards,

Hans



 >> Previous press/release behavior has changed.
 >> Before: both press/release events were generated on key touch.
 >> Now: press/release events correspond to real touch and release now.
 >
 > Looking at the old code I do not think that this is correct,
 > the old code keeps reporting KEY_LEFTMETA as pressed as long as
 > the GOODIX_HAVE_KEY is set. I guess the undesirable behavior you
 > describe here was the result of an earlier version of your
 > patch to support more then one touch key.
 >
I've just tested the old code: it has wrong behavior. And the patch 2/2 ("Input: goodix - Ignore spurious interrupts", 2020-03-10) makes it correct.
Ah ok, that explains. Well then this bit should probably go to the
commit message of 2/2, since the problem will still exist after 1/2, right?




Kind regards
Dmitry Mastykin


On 3/10/20 5:40 PM, Hans de Goede wrote:
 > Hi,
 >
 > Thank you for your patches.
 >
 > On 3/10/20 2:17 PM, Dmitry Mastykin wrote:
 >> KEY_LEFTMETA is assigned to the first touch-key (it will be the default
 >> keycode for devices with a single touch-key).
 >> KEY_F1, KEY_F2... are assigned to other touch-keys.
 >> One may assign any keycodes via HWDB.
 >
 > I think the commit message could use some work, e.g. something like this:
 >
 > ###
 >
 > Subj: Input: goodix - Add support for more then one touch-key
 >
 > Some devices with a goodix touchscreen have more then 1 capacitive
 > touch-key. This commit replaces the current support for a single
 > touch-key, which ignored the reported key-code. With support for
 > up to 7 touch-keys, based upon checking the key-code which is
 > post-fixed to any reported touch-data.
 >
 > KEY_LEFTMETA is assigned to the first touch-key (it will still be
 > the default keycode for devices with a single touch-key).
 > KEY_F1, KEY_F2... are assigned as default keycode for the other
 > touch-keys.
 >
 > This commit also add supports for keycode remapping, so that
 > systemd-udev's hwdb can be used to remap the codes to send
 > keycodes to match the icons on the buttons for devices with more
 > then 1 touch-key.
 >
 > ###
 >
 >> Previous press/release behavior has changed.
 >> Before: both press/release events were generated on key touch.
 >> Now: press/release events correspond to real touch and release now.
 >
 > Looking at the old code I do not think that this is correct,
 > the old code keeps reporting KEY_LEFTMETA as pressed as long as
 > the GOODIX_HAVE_KEY is set. I guess the undesirable behavior you
 > describe here was the result of an earlier version of your
 > patch to support more then one touch key.
 >
 >> Signed-off-by: Dmitry Mastykin [off-list ref]
 >
 > Other then the remarks about the commit message this looks
 > good to me.
 >
 > Regards,
 >
 > Hans
 >
 >
 >> ---
 >>   drivers/input/touchscreen/goodix.c | 54 ++++++++++++++++++++++++------
 >>   1 file changed, 44 insertions(+), 10 deletions(-)
 >>
 >> diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
 >> index fdec508..6a7ecc6 100644
 >> --- a/drivers/input/touchscreen/goodix.c
 >> +++ b/drivers/input/touchscreen/goodix.c
 >> @@ -38,6 +38,7 @@
 >>   #define GOODIX_CONTACT_SIZE        8
 >>   #define GOODIX_MAX_CONTACT_SIZE        9
 >>   #define GOODIX_MAX_CONTACTS        10
 >> +#define GOODIX_MAX_KEYS            7
 >>   #define GOODIX_CONFIG_MIN_LENGTH    186
 >>   #define GOODIX_CONFIG_911_LENGTH    186
 >> @@ -55,6 +56,7 @@
 >>   #define GOODIX_REG_ID            0x8140
 >>   #define GOODIX_BUFFER_STATUS_READY    BIT(7)
 >> +#define GOODIX_HAVE_KEY            BIT(4)
 >>   #define GOODIX_BUFFER_STATUS_TIMEOUT    20
 >>   #define RESOLUTION_LOC        1
 >> @@ -100,6 +102,7 @@ struct goodix_ts_data {
 >>       enum goodix_irq_pin_access_method irq_pin_access_method;
 >>       unsigned int contact_size;
 >>       u8 config[GOODIX_CONFIG_MAX_LENGTH];
 >> +    unsigned short keymap[GOODIX_MAX_KEYS];
 >>   };
 >>   static int goodix_check_cfg_8(struct goodix_ts_data *ts,
 >> @@ -285,8 +288,14 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
 >>        */
 >>       max_timeout = jiffies + msecs_to_jiffies(GOODIX_BUFFER_STATUS_TIMEOUT);
 >>       do {
 >> +        /*
 >> +         * We are going to read ts->contact_size * max(1, touch_num) + 2
 >> +         * bytes, where + 2 consists of reading 1 extra byte for the
 >> +         * header + 1 extra byte for the footer which contains the
 >> +         * touch-key code.
 >> +         */
 >>           error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR,
 >> -                    data, ts->contact_size + 1);
 >> +                    data, ts->contact_size + 2);
 >>           if (error) {
 >>               dev_err(&ts->client->dev, "I2C transfer error: %d\n",
 >>                       error);
 >> @@ -299,10 +308,10 @@ static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
 >>                   return -EPROTO;
 >>               if (touch_num > 1) {
 >> -                data += 1 + ts->contact_size;
 >> +                data += 2 + ts->contact_size;
 >>                   error = goodix_i2c_read(ts->client,
 >>                           GOODIX_READ_COOR_ADDR +
 >> -                            1 + ts->contact_size,
 >> +                            2 + ts->contact_size,
 >>                           data,
 >>                           ts->contact_size *
 >>                               (touch_num - 1));
 >> @@ -353,6 +362,23 @@ static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
 >>       input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
 >>   }
 >> +static void goodix_ts_report_key(struct goodix_ts_data *ts, u8 *data)
 >> +{
 >> +    int touch_num;
 >> +    u8 key_value;
 >> +    int i;
 >> +
 >> +    if (data[0] & GOODIX_HAVE_KEY) {
 >> +        touch_num = data[0] & 0x0f;
 >> +        key_value = data[1 + ts->contact_size * touch_num];
 >> +        for (i = 0; i < GOODIX_MAX_KEYS; ++i)
 >> +            if (key_value & (1 << i))
 >> +                input_report_key(ts->input_dev, ts->keymap[i], 1);
 >> +    } else
 >> +        for (i = 0; i < GOODIX_MAX_KEYS; ++i)
 >> +            input_report_key(ts->input_dev, ts->keymap[i], 0);
 >> +}
 >> +
 >>   /**
 >>    * goodix_process_events - Process incoming events
 >>    *
 >> @@ -363,7 +389,7 @@ static void goodix_ts_report_touch_9b(struct goodix_ts_data *ts, u8 *coor_data)
 >>    */
 >>   static void goodix_process_events(struct goodix_ts_data *ts)
 >>   {
 >> -    u8  point_data[1 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
 >> +    u8  point_data[2 + GOODIX_MAX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
 >>       int touch_num;
 >>       int i;
 >> @@ -371,11 +397,7 @@ static void goodix_process_events(struct goodix_ts_data *ts)
 >>       if (touch_num < 0)
 >>           return;
 >> -    /*
 >> -     * Bit 4 of the first byte reports the status of the capacitive
 >> -     * Windows/Home button.
 >> -     */
 >> -    input_report_key(ts->input_dev, KEY_LEFTMETA, point_data[0] & BIT(4));
 >> +    goodix_ts_report_key(ts, point_data);
 >>       for (i = 0; i < touch_num; i++)
 >>           if (ts->contact_size == 9)
 >> @@ -961,6 +983,7 @@ static int goodix_i2c_test(struct i2c_client *client)
 >>   static int goodix_configure_dev(struct goodix_ts_data *ts)
 >>   {
 >>       int error;
 >> +    int i;
 >>       ts->int_trigger_type = GOODIX_INT_TRIGGER;
 >>       ts->max_touch_num = GOODIX_MAX_CONTACTS;
 >> @@ -978,8 +1001,19 @@ static int goodix_configure_dev(struct goodix_ts_data *ts)
 >>       ts->input_dev->id.product = ts->id;
 >>       ts->input_dev->id.version = ts->version;
 >> +    ts->input_dev->keycode = ts->keymap;
 >> +    ts->input_dev->keycodesize = sizeof(ts->keymap[0]);
 >> +    ts->input_dev->keycodemax = GOODIX_MAX_KEYS;
 >> +
 >>       /* Capacitive Windows/Home button on some devices */
 >> -    input_set_capability(ts->input_dev, EV_KEY, KEY_LEFTMETA);
 >> +    for (i = 0; i < GOODIX_MAX_KEYS; ++i) {
 >> +        if (i == 0)
 >> +            ts->keymap[i] = KEY_LEFTMETA;
 >> +        else
 >> +            ts->keymap[i] = KEY_F1 + (i - 1);
 >> +
 >> +        input_set_capability(ts->input_dev, EV_KEY, ts->keymap[i]);
 >> +    }
 >>       input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_X);
 >>       input_set_capability(ts->input_dev, EV_ABS, ABS_MT_POSITION_Y);
 >>
 >

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