This patch adds a new behavior to report touch major resolution
based on information provided by firmware.
In initial process, driver acquires touch information from touch ic.
It contains one byte about the resolution value of ABS_MT_TOUCH_MAJOR.
Touch driver will report touch major resolution by this information.
Signed-off-by: Johnny Chuang <[email protected]>
---
Changes in v2:
- register a real resolution value from firmware,
instead of hardcoding resolution value as 1 by flag.
Changes in v3:
- modify git log message from flag to real value.
- modify driver comment from flag to real value.
---
drivers/input/touchscreen/elants_i2c.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index b0bd5bb..661a3ee 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -151,6 +151,7 @@ struct elants_data {
bool wake_irq_enabled;
bool keep_power_in_suspend;
+ u8 report_major_resolution;
/* Must be last to be used for DMA operations */
u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned;
@@ -459,6 +460,9 @@ static int elants_i2c_query_ts_info(struct elants_data *ts)
rows = resp[2] + resp[6] + resp[10];
cols = resp[3] + resp[7] + resp[11];
+ /* get report resolution value of ABS_MT_TOUCH_MAJOR */
+ ts->report_major_resolution = resp[16];
+
/* Process mm_to_pixel information */
error = elants_i2c_execute_command(client,
get_osr_cmd, sizeof(get_osr_cmd),
@@ -1325,6 +1329,8 @@ static int elants_i2c_probe(struct i2c_client *client,
0, MT_TOOL_PALM, 0, 0);
input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res);
input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res);
+ if (ts->report_major_resolution > 0)
+ input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, ts->report_major_resolution);
touchscreen_parse_properties(ts->input, true, &ts->prop);
--
2.7.4
On Thu, 27 Aug 2020 at 19:20, Johnny Chuang <[email protected]> wrote:
>
> This patch adds a new behavior to report touch major resolution
> based on information provided by firmware.
>
> In initial process, driver acquires touch information from touch ic.
> It contains one byte about the resolution value of ABS_MT_TOUCH_MAJOR.
> Touch driver will report touch major resolution by this information.
>
> Signed-off-by: Johnny Chuang <[email protected]>
Thanks Johnny!
Reviewed-by: Harry Cutts <[email protected]>
Harry Cutts
Chrome OS Touch/Input team
> ---
> Changes in v2:
> - register a real resolution value from firmware,
> instead of hardcoding resolution value as 1 by flag.
> Changes in v3:
> - modify git log message from flag to real value.
> - modify driver comment from flag to real value.
> ---
> drivers/input/touchscreen/elants_i2c.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
> index b0bd5bb..661a3ee 100644
> --- a/drivers/input/touchscreen/elants_i2c.c
> +++ b/drivers/input/touchscreen/elants_i2c.c
> @@ -151,6 +151,7 @@ struct elants_data {
>
> bool wake_irq_enabled;
> bool keep_power_in_suspend;
> + u8 report_major_resolution;
>
> /* Must be last to be used for DMA operations */
> u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned;
> @@ -459,6 +460,9 @@ static int elants_i2c_query_ts_info(struct elants_data *ts)
> rows = resp[2] + resp[6] + resp[10];
> cols = resp[3] + resp[7] + resp[11];
>
> + /* get report resolution value of ABS_MT_TOUCH_MAJOR */
> + ts->report_major_resolution = resp[16];
> +
> /* Process mm_to_pixel information */
> error = elants_i2c_execute_command(client,
> get_osr_cmd, sizeof(get_osr_cmd),
> @@ -1325,6 +1329,8 @@ static int elants_i2c_probe(struct i2c_client *client,
> 0, MT_TOOL_PALM, 0, 0);
> input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res);
> input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res);
> + if (ts->report_major_resolution > 0)
> + input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, ts->report_major_resolution);
>
> touchscreen_parse_properties(ts->input, true, &ts->prop);
>
> --
> 2.7.4
>
> On Thu, 27 Aug 2020 at 19:20, Johnny Chuang
> <[email protected]> wrote:
> >
> > This patch adds a new behavior to report touch major resolution based
> > on information provided by firmware.
> >
> > In initial process, driver acquires touch information from touch ic.
> > It contains one byte about the resolution value of ABS_MT_TOUCH_MAJOR.
> > Touch driver will report touch major resolution by this information.
> >
> > Signed-off-by: Johnny Chuang <[email protected]>
>
> Thanks Johnny!
>
> Reviewed-by: Harry Cutts <[email protected]>
>
> Harry Cutts
> Chrome OS Touch/Input team
>
Hi Sirs,
Can you help to review this patch?
> > ---
> > Changes in v2:
> > - register a real resolution value from firmware,
> > instead of hardcoding resolution value as 1 by flag.
> > Changes in v3:
> > - modify git log message from flag to real value.
> > - modify driver comment from flag to real value.
> > ---
> > drivers/input/touchscreen/elants_i2c.c | 6 ++++++
> > 1 file changed, 6 insertions(+)
> >
> > diff --git a/drivers/input/touchscreen/elants_i2c.c
> > b/drivers/input/touchscreen/elants_i2c.c
> > index b0bd5bb..661a3ee 100644
> > --- a/drivers/input/touchscreen/elants_i2c.c
> > +++ b/drivers/input/touchscreen/elants_i2c.c
> > @@ -151,6 +151,7 @@ struct elants_data {
> >
> > bool wake_irq_enabled;
> > bool keep_power_in_suspend;
> > + u8 report_major_resolution;
> >
> > /* Must be last to be used for DMA operations */
> > u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned; @@ -459,6
> > +460,9 @@ static int elants_i2c_query_ts_info(struct elants_data *ts)
> > rows = resp[2] + resp[6] + resp[10];
> > cols = resp[3] + resp[7] + resp[11];
> >
> > + /* get report resolution value of ABS_MT_TOUCH_MAJOR */
> > + ts->report_major_resolution = resp[16];
> > +
> > /* Process mm_to_pixel information */
> > error = elants_i2c_execute_command(client,
> > get_osr_cmd,
> > sizeof(get_osr_cmd), @@ -1325,6 +1329,8 @@ static int
> elants_i2c_probe(struct i2c_client *client,
> > 0, MT_TOOL_PALM, 0, 0);
> > input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res);
> > input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res);
> > + if (ts->report_major_resolution > 0)
> > + input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR,
> > + ts->report_major_resolution);
> >
> > touchscreen_parse_properties(ts->input, true, &ts->prop);
> >
> > --
> > 2.7.4
> >
On Fri, Aug 28, 2020 at 10:19:55AM +0800, Johnny Chuang wrote:
> This patch adds a new behavior to report touch major resolution
> based on information provided by firmware.
>
> In initial process, driver acquires touch information from touch ic.
> It contains one byte about the resolution value of ABS_MT_TOUCH_MAJOR.
> Touch driver will report touch major resolution by this information.
>
> Signed-off-by: Johnny Chuang <[email protected]>
> ---
> Changes in v2:
> - register a real resolution value from firmware,
> instead of hardcoding resolution value as 1 by flag.
> Changes in v3:
> - modify git log message from flag to real value.
> - modify driver comment from flag to real value.
> ---
> drivers/input/touchscreen/elants_i2c.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
> index b0bd5bb..661a3ee 100644
> --- a/drivers/input/touchscreen/elants_i2c.c
> +++ b/drivers/input/touchscreen/elants_i2c.c
> @@ -151,6 +151,7 @@ struct elants_data {
>
> bool wake_irq_enabled;
> bool keep_power_in_suspend;
> + u8 report_major_resolution;
I renamed this to "major_res" to match x_res and y_res, and applied.
Thanks.
--
Dmitry