[PATCH v5 5/9] Input: atmel_mxt_ts - handle diagnostic data orientation

[Nick Dyer]

Invert the diagnostic data to match the orientation of the input device.

Signed-off-by: Nick Dyer <nick.d...@itdev.co.uk>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c 
b/drivers/input/touchscreen/atmel_mxt_ts.c
index 8ef61d7..3f7e357 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -125,6 +125,8 @@ struct t9_range {
 
 /* MXT_TOUCH_MULTI_T9 orient */
 #define MXT_T9_ORIENT_SWITCH   (1 << 0)
+#define MXT_T9_ORIENT_INVERTX  (1 << 1)
+#define MXT_T9_ORIENT_INVERTY  (1 << 2)
 
 /* MXT_SPT_COMMSCONFIG_T18 */
 #define MXT_COMMS_CTRL         0
@@ -158,6 +160,8 @@ struct t37_debug {
 #define MXT_T100_YRANGE                24
 
 #define MXT_T100_CFG_SWITCHXY  BIT(5)
+#define MXT_T100_CFG_INVERTY   BIT(6)
+#define MXT_T100_CFG_INVERTX   BIT(7)
 
 #define MXT_T100_TCHAUX_VECT   BIT(0)
 #define MXT_T100_TCHAUX_AMPL   BIT(1)
@@ -262,6 +266,8 @@ struct mxt_data {
        unsigned int irq;
        unsigned int max_x;
        unsigned int max_y;
+       bool invertx;
+       bool inverty;
        bool xy_switch;
        u8 xsize;
        u8 ysize;
@@ -1747,6 +1753,8 @@ static int mxt_read_t9_resolution(struct mxt_data *data)
                return error;
 
        data->xy_switch = orient & MXT_T9_ORIENT_SWITCH;
+       data->invertx = orient & MXT_T9_ORIENT_INVERTX;
+       data->inverty = orient & MXT_T9_ORIENT_INVERTY;
 
        return 0;
 }
@@ -1801,6 +1809,8 @@ static int mxt_read_t100_config(struct mxt_data *data)
                return error;
 
        data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY;
+       data->invertx = cfg & MXT_T100_CFG_INVERTX;
+       data->inverty = cfg & MXT_T100_CFG_INVERTY;
 
        /* allocate aux bytes */
        error =  __mxt_read_reg(client,
@@ -2145,13 +2155,19 @@ static int mxt_convert_debug_pages(struct mxt_data 
*data, u16 *outbuf)
        struct mxt_dbg *dbg = &data->dbg;
        unsigned int x = 0;
        unsigned int y = 0;
-       unsigned int i;
+       unsigned int i, rx, ry;
 
        for (i = 0; i < dbg->t37_nodes; i++) {
-               outbuf[i] = mxt_get_debug_value(data, x, y);
+               /* Handle orientation */
+               rx = data->xy_switch ? y : x;
+               ry = data->xy_switch ? x : y;
+               rx = data->invertx ? (data->xsize - 1 - rx) : rx;
+               ry = data->inverty ? (data->ysize - 1 - ry) : ry;
+
+               outbuf[i] = mxt_get_debug_value(data, rx, ry);
 
                /* Next value */
-               if (++x >= data->xsize) {
+               if (++x >= (data->xy_switch ? data->ysize : data->xsize)) {
                        x = 0;
                        y++;
                }
@@ -2306,8 +2322,8 @@ static int mxt_set_input(struct mxt_data *data, unsigned 
int i)
        if (i > 0)
                return -EINVAL;
 
-       f->width = data->xsize;
-       f->height = data->ysize;
+       f->width = data->xy_switch ? data->ysize : data->xsize;
+       f->height = data->xy_switch ? data->xsize : data->ysize;
        f->pixelformat = V4L2_TCH_FMT_DELTA_TD16;
        f->field = V4L2_FIELD_NONE;
        f->colorspace = V4L2_COLORSPACE_RAW;
-- 
2.5.0

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