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[media] Input: atmel_mxt_ts - read touchscreen size

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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.

Note: this does not read the XORIGIN/YORIGIN fields so it assumes that
the touchscreen starts at (0,0)

Signed-off-by: Nick Dyer <nick@shmanahar.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Nick Dyer 2016-07-18 18:10:33 -03:00 committed by Mauro Carvalho Chehab
parent ecfdd7e266
commit 2786489f32
1 changed files with 36 additions and 6 deletions
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42
drivers/input/touchscreen/atmel_mxt_ts.c
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@ -103,6 +103,8 @@ 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
@ -150,7 +152,9 @@ 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)
@ -259,6 +263,8 @@ 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;
@ -1713,6 +1719,18 @@ static int mxt_read_t9_resolution(struct mxt_data *data)
if (!object)
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);
@ -1763,6 +1781,18 @@ 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,
@ -2121,7 +2151,7 @@ static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf)
outbuf[i] = mxt_get_debug_value(data, x, y);
/* Next value */
if (++x >= data->info.matrix_xsize) {
if (++x >= data->xsize) {
x = 0;
y++;
}
@ -2276,8 +2306,8 @@ static int mxt_set_input(struct mxt_data *data, unsigned int i)
if (i > 0)
return -EINVAL;
f->width = data->info.matrix_xsize;
f->height = data->info.matrix_ysize;
f->width = data->xsize;
f->height = data->ysize;
f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
f->field = V4L2_FIELD_NONE;
f->colorspace = V4L2_COLORSPACE_RAW;
@ -2392,9 +2422,9 @@ static void mxt_debug_init(struct mxt_data *data)
dbg->t37_address = object->start_address;
/* Calculate size of data and allocate buffer */
dbg->t37_nodes = data->info.matrix_xsize * data->info.matrix_ysize;
dbg->t37_pages = DIV_ROUND_UP(dbg->t37_nodes * sizeof(u16),
sizeof(dbg->t37_buf->data));
dbg->t37_nodes = data->xsize * data->ysize;
dbg->t37_pages = DIV_ROUND_UP(data->xsize * data->info.matrix_ysize *
sizeof(u16), sizeof(dbg->t37_buf->data));
dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages,
sizeof(struct t37_debug), GFP_KERNEL);