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Date: Wed, 20 Nov 2013 23:54:10 +0100
From: Friedrich Schöller <linux@...oeller.se>
To: Henrik Rydberg <rydberg@...omail.se>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
linux-input@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Friedrich Schöller <linux@...oeller.se>
Subject: [PATCH 1/3] Input: Fixed ABS_MT_TOUCH_MINOR scale factor in BCM5974 multitouch driver
On wellspring3 devices ABS_MT_TOUCH_MINOR was sometimes reported bigger than
ABS_MT_TOUCH_MAJOR. This is fixed by rescaling ABS_MT_TOUCH_MINOR by a factor of
0.85 instead of 2. Excessive tapping on the trackpad shows this to be the right
value. Circular touches should now lead to values for ABS_MT_TOUCH_MAJOR and
ABS_MT_TOUCH_MINOR that are similar, with ABS_MT_TOUCH_MINOR never greater than
ABS_MT_TOUCH_MAJOR.
---
drivers/input/mouse/bcm5974.c | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.c
index a73f961..af15410 100644
--- a/drivers/input/mouse/bcm5974.c
+++ b/drivers/input/mouse/bcm5974.c
@@ -235,6 +235,7 @@ struct bcm5974_config {
enum tp_type tp_type; /* type of trackpad interface */
int tp_offset; /* offset to trackpad finger data */
int tp_datalen; /* data length of the trackpad interface */
+ float touch_minor_f; /* factor for ABS_MT_TOUCH_MINOR */
struct bcm5974_param p; /* finger pressure limits */
struct bcm5974_param w; /* finger width limits */
struct bcm5974_param x; /* horizontal limits */
@@ -275,6 +276,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
0,
0x84, sizeof(struct bt_data),
0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 256 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4824, 5342 },
@@ -288,6 +290,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
0,
0x84, sizeof(struct bt_data),
0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 256 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4824, 4824 },
@@ -301,6 +304,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 0.85,
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4460, 5166 },
@@ -314,6 +318,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4620, 5140 },
@@ -327,6 +332,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4616, 5112 },
@@ -340,6 +346,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4415, 5050 },
@@ -353,6 +360,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4620, 5140 },
@@ -366,6 +374,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4750, 5280 },
@@ -379,6 +388,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4620, 5140 },
@@ -392,6 +402,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4750, 5280 },
@@ -405,6 +416,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0x84, sizeof(struct bt_data),
0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4750, 5280 },
@@ -418,6 +430,7 @@ static const struct bcm5974_config bcm5974_config_table[] = {
HAS_INTEGRATED_BUTTON,
0, sizeof(struct bt_data),
0x83, TYPE3, FINGER_TYPE3, FINGER_TYPE3 + SIZEOF_ALL_FINGERS,
+ 2, /* verify me! */
{ SN_PRESSURE, 0, 300 },
{ SN_WIDTH, 0, 2048 },
{ SN_COORD, -4620, 5140 },
@@ -502,7 +515,8 @@ static int report_bt_state(struct bcm5974 *dev, int size)
return 0;
}
-static void report_finger_data(struct input_dev *input, int slot,
+static void report_finger_data(struct input_dev *input,
+ const struct bcm5974_config *cfg, int slot,
const struct input_mt_pos *pos,
const struct tp_finger *f)
{
@@ -512,7 +526,7 @@ static void report_finger_data(struct input_dev *input, int slot,
input_report_abs(input, ABS_MT_TOUCH_MAJOR,
raw2int(f->touch_major) << 1);
input_report_abs(input, ABS_MT_TOUCH_MINOR,
- raw2int(f->touch_minor) << 1);
+ raw2int(f->touch_minor) * cfg->touch_minor_f);
input_report_abs(input, ABS_MT_WIDTH_MAJOR,
raw2int(f->tool_major) << 1);
input_report_abs(input, ABS_MT_WIDTH_MINOR,
@@ -568,7 +582,7 @@ static int report_tp_state(struct bcm5974 *dev, int size)
input_mt_assign_slots(input, dev->slots, dev->pos, n);
for (i = 0; i < n; i++)
- report_finger_data(input, dev->slots[i],
+ report_finger_data(input, c, dev->slots[i],
&dev->pos[i], dev->index[i]);
input_mt_sync_frame(input);
--
1.8.4.2
--
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