From: Nick Dyer <nick.dyer@itdev.co.uk>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Yufeng Shen <miletus@google.com>,
Benson Leung <bleung@chromium.org>,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org,
Alan Bowens <Alan.Bowens@atmel.com>,
Javier Martinez Canillas <javier@osg.samsung.com>,
Chris Healy <cphealy@gmail.com>,
Nick Dyer <nick.dyer@itdev.co.uk>
Subject: [PATCH RFC 3/8] Input: atmel_mxt_ts - read touchscreen position in matrix
Date: Wed, 2 Dec 2015 20:42:26 +0000 [thread overview]
Message-ID: <1449088951-7069-4-git-send-email-nick.dyer@itdev.co.uk> (raw)
In-Reply-To: <1449088951-7069-1-git-send-email-nick.dyer@itdev.co.uk>
The touchscreen may have a margin where not all the matrix is used. Read
the parameters from T9 and T100 and take account of the difference.
Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 41 ++++++++++++++++++++++++++++----
1 file changed, 36 insertions(+), 5 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index a96fec4..9bc42f4 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -100,6 +100,8 @@ struct t7_config {
/* MXT_TOUCH_MULTI_T9 field */
#define MXT_T9_CTRL 0
+#define MXT_T9_XSIZE 3
+#define MXT_T9_YSIZE 4
#define MXT_T9_ORIENT 9
#define MXT_T9_RANGE 18
@@ -145,7 +147,9 @@ struct t37_debug {
#define MXT_T100_CTRL 0
#define MXT_T100_CFG1 1
#define MXT_T100_TCHAUX 3
+#define MXT_T100_XSIZE 9
#define MXT_T100_XRANGE 13
+#define MXT_T100_YSIZE 20
#define MXT_T100_YRANGE 24
#define MXT_T100_CFG_SWITCHXY BIT(5)
@@ -243,6 +247,8 @@ struct mxt_data {
unsigned int max_x;
unsigned int max_y;
bool xy_switch;
+ u8 xsize;
+ u8 ysize;
bool in_bootloader;
u16 mem_size;
u8 t100_aux_ampl;
@@ -1688,6 +1694,18 @@ static int mxt_read_t9_resolution(struct mxt_data *data)
return -EINVAL;
error = __mxt_read_reg(client,
+ object->start_address + MXT_T9_XSIZE,
+ sizeof(data->xsize), &data->xsize);
+ if (error)
+ return error;
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T9_YSIZE,
+ sizeof(data->ysize), &data->ysize);
+ if (error)
+ return error;
+
+ error = __mxt_read_reg(client,
object->start_address + MXT_T9_RANGE,
sizeof(range), &range);
if (error)
@@ -1737,6 +1755,18 @@ static int mxt_read_t100_config(struct mxt_data *data)
data->max_y = get_unaligned_le16(&range_y);
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_XSIZE,
+ sizeof(data->xsize), &data->xsize);
+ if (error)
+ return error;
+
+ error = __mxt_read_reg(client,
+ object->start_address + MXT_T100_YSIZE,
+ sizeof(data->ysize), &data->ysize);
+ if (error)
+ return error;
+
/* read orientation config */
error = __mxt_read_reg(client,
object->start_address + MXT_T100_CFG1,
@@ -2077,7 +2107,7 @@ static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x,
struct mxt_dbg *dbg = &data->dbg;
unsigned int ofs, page;
- ofs = (y + (x * (data->info.matrix_ysize))) * sizeof(u16);
+ ofs = (y + (x * data->info.matrix_ysize)) * sizeof(u16);
page = ofs / MXT_DIAGNOSTIC_SIZE;
ofs %= MXT_DIAGNOSTIC_SIZE;
@@ -2095,7 +2125,7 @@ static void mxt_convert_debug_pages(struct mxt_data *data)
dbg->debug_buf[i] = mxt_get_debug_value(data, x, y);
/* Next value */
- if (++x >= data->info.matrix_xsize) {
+ if (++x >= data->xsize) {
x = 0;
y++;
}
@@ -2213,9 +2243,10 @@ static void mxt_debugfs_init(struct mxt_data *data)
}
/* Calculate size of data and allocate buffer */
- dbg->t37_nodes = data->info.matrix_xsize * data->info.matrix_ysize;
- dbg->t37_pages = dbg->t37_nodes * sizeof(u16)
- / sizeof(dbg->t37_buf->data) + 1;
+ dbg->t37_nodes = data->xsize * data->ysize;
+ dbg->t37_pages = ((data->xsize * data->info.matrix_ysize)
+ * sizeof(u16) / sizeof(dbg->t37_buf->data)) + 1;
+
dbg->debug_buf = devm_kzalloc(&data->client->dev,
dbg->t37_nodes * sizeof(u16),
GFP_KERNEL);
--
2.5.0
next prev parent reply other threads:[~2015-12-02 20:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-02 20:42 [PATCH RFC 0/8] Input: atmel_mxt_ts - raw data via debugfs Nick Dyer
2015-12-02 20:42 ` [PATCH RFC 1/8] Input: atmel_mxt_ts - improve touchscreen size/orientation handling Nick Dyer
2015-12-02 20:42 ` [PATCH RFC 2/8] Input: atmel_mxt_ts - add diagnostic data retrieval via debugfs Nick Dyer
2015-12-02 20:42 ` Nick Dyer [this message]
2015-12-02 20:42 ` [PATCH RFC 4/8] Input: atmel_mxt_ts - handle diagnostic data orientation Nick Dyer
2015-12-02 20:42 ` [PATCH RFC 5/8] Input: atmel_mxt_ts - add diagnostic data support for mXT1386 Nick Dyer
2015-12-02 20:42 ` [PATCH RFC 6/8] Input: atmel_mxt_ts - Add support for reference data Nick Dyer
2015-12-02 20:42 ` [PATCH RFC 7/8] Input: atmel_mxt_ts - add metadata to debugfs Nick Dyer
2015-12-02 20:42 ` [PATCH RFC 8/8] Input: atmel_mxt_ts - create debugfs info file Nick Dyer
2015-12-17 17:22 ` [PATCH RFC 0/8] Input: atmel_mxt_ts - raw data via debugfs Nick Dyer
2016-01-11 23:24 ` Dmitry Torokhov
2016-01-12 8:10 ` Benjamin Tissoires
2016-01-13 17:20 ` Nick Dyer
2016-01-13 18:40 ` Dmitry Torokhov
[not found] ` <CAFXsbZrJg75Z1jRYmzac9grr5Oqqtq4gW9Cs8aDh15wvBjrKNg@mail.gmail.com>
2016-01-13 20:42 ` Henrik Rydberg
2016-02-08 21:38 ` Nick Dyer
2016-03-10 14:08 ` Nick Dyer
2016-01-13 18:35 ` Dmitry Torokhov
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