Add support for retrieving a single node of data at high rate.
---
drivers/input/touchscreen/atmel_mxt_ts.c | 79 ++++++++++++++++++++++++++++----
1 file changed, 70 insertions(+), 9 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c
b/drivers/input/touchscreen/atmel_mxt_ts.c
index 6a35d94..3bb1179 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -239,6 +239,7 @@ struct mxt_dbg {
struct t37_debug *t37_buf;
unsigned int t37_pages;
unsigned int t37_nodes;
+ unsigned int single_node_ofs;
struct v4l2_device v4l2;
struct v4l2_pix_format format;
@@ -251,6 +252,8 @@ struct mxt_dbg {
enum v4l_dbg_inputs {
MXT_V4L_INPUT_DELTAS,
MXT_V4L_INPUT_REFS,
+ MXT_V4L_INPUT_DELTAS_SINGLE,
+ MXT_V4L_INPUT_REFS_SINGLE,
MXT_V4L_INPUT_MAX,
};
@@ -2197,17 +2200,19 @@ static int mxt_convert_debug_pages(struct mxt_data
*data, u16 *outbuf)
}
static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode,
- u16 *outbuf)
+ u16 *outbuf, bool single_node)
{
struct mxt_dbg *dbg = &data->dbg;
int retries = 0;
int page;
+ int pages = single_node ? 1 : dbg->t37_pages;
int ret;
u8 cmd = mode;
struct t37_debug *p;
u8 cmd_poll;
- for (page = 0; page < dbg->t37_pages; page++) {
+
+ for (page = 0; page < pages; page++) {
p = dbg->t37_buf + page;
ret = mxt_write_reg(data->client, dbg->diag_cmd_address,
@@ -2251,7 +2256,15 @@ wait_cmd:
cmd = MXT_DIAGNOSTIC_PAGEUP;
}
- return mxt_convert_debug_pages(data, outbuf);
+ if (single_node) {
+ *outbuf = get_unaligned_le16(&dbg->t37_buf[0]
+ .data[dbg->single_node_ofs]);
+ ret = 0;
+ } else {
+ ret = mxt_convert_debug_pages(data, outbuf);
+ }
+
+ return ret;
}
static int mxt_queue_setup(struct vb2_queue *q,
@@ -2278,6 +2291,7 @@ static void mxt_buffer_queue(struct vb2_buffer *vb)
u16 *ptr;
int ret;
u8 mode;
+ bool single_node = false;
ptr = vb2_plane_vaddr(vb, 0);
if (!ptr) {
@@ -2286,17 +2300,21 @@ static void mxt_buffer_queue(struct vb2_buffer *vb)
}
switch (data->dbg.input) {
+ case MXT_V4L_INPUT_DELTAS_SINGLE:
+ single_node = true; /* fall through */
case MXT_V4L_INPUT_DELTAS:
default:
mode = MXT_DIAGNOSTIC_DELTAS;
break;
+ case MXT_V4L_INPUT_REFS_SINGLE:
+ single_node = true; /* fall through */
case MXT_V4L_INPUT_REFS:
mode = MXT_DIAGNOSTIC_REFS;
break;
}
- ret = mxt_read_diagnostic_debug(data, mode, ptr);
+ ret = mxt_read_diagnostic_debug(data, mode, ptr, single_node);
if (ret)
goto fault;
@@ -2360,6 +2378,12 @@ static int mxt_vidioc_enum_input(struct file *file, void
*priv,
case MXT_V4L_INPUT_DELTAS:
strlcpy(i->name, "Mutual Deltas", sizeof(i->name));
break;
+ case MXT_V4L_INPUT_REFS_SINGLE:
+ strlcpy(i->name, "Single node refs", sizeof(i->name));
+ break;
+ case MXT_V4L_INPUT_DELTAS_SINGLE:
+ strlcpy(i->name, "Single node deltas", sizeof(i->name));
+ break;
}
return 0;
@@ -2372,8 +2396,20 @@ static int mxt_set_input(struct mxt_data *data, unsigned
int i)
if (i >= MXT_V4L_INPUT_MAX)
return -EINVAL;
- f->width = data->xy_switch ? data->ysize : data->xsize;
- f->height = data->xy_switch ? data->xsize : data->ysize;
+ switch (i) {
+ case MXT_V4L_INPUT_REFS:
+ case MXT_V4L_INPUT_DELTAS:
+ f->width = data->xy_switch ? data->ysize : data->xsize;
+ f->height = data->xy_switch ? data->xsize : data->ysize;
+ break;
+
+ case MXT_V4L_INPUT_REFS_SINGLE:
+ case MXT_V4L_INPUT_DELTAS_SINGLE:
+ f->width = 1;
+ f->height = 1;
+ break;
+ }
+
f->pixelformat = V4L2_PIX_FMT_Y16;
f->field = V4L2_FIELD_NONE;
f->colorspace = V4L2_COLORSPACE_SRGB;
@@ -2426,11 +2462,21 @@ static int mxt_vidioc_enum_framesizes(struct file
*file, void *priv,
{
struct mxt_data *data = video_drvdata(file);
- if (f->index > 0)
+ switch (f->index) {
+ case 0:
+ f->discrete.width = data->xy_switch ? data->ysize:data->xsize;
+ f->discrete.height = data->xy_switch ? data->xsize:data->ysize;
+ break;
+
+ case 1:
+ f->discrete.width = 1;
+ f->discrete.height = 1;
+ break;
+
+ default:
return -EINVAL;
+ }
- f->discrete.width = data->xy_switch ? data->ysize : data->xsize;
- f->discrete.height = data->xy_switch ? data->xsize : data->ysize;
f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
return 0;
}
@@ -2479,6 +2525,19 @@ static const struct video_device mxt_video_device = {
.release = video_device_release_empty,
};
+static void mxt_debugfs_calc_single_node_ofs(struct mxt_data *data)
+{
+ struct mxt_info *info = &data->info;
+ int ofs = data->ysize / 2;
+
+ while ((ofs + info->matrix_ysize) <= (MXT_DIAGNOSTIC_SIZE/sizeof(u16)))
+ ofs += info->matrix_ysize;
+
+ dev_dbg(&data->client->dev, "Single node ofs: %d\n", ofs);
+
+ data->dbg.single_node_ofs = ofs;
+}
+
static void mxt_debug_init(struct mxt_data *data)
{
struct mxt_info *info = &data->info;
@@ -2519,6 +2578,8 @@ static void mxt_debug_init(struct mxt_data *data)
if (!dbg->t37_buf)
goto error;
+ mxt_debugfs_calc_single_node_ofs(data);
+
/* init channel to zero */
mxt_set_input(data, 0);
--
2.5.0
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