On Fri, Jul 24, 2015 at 01:18:14PM +0200, Bastien Nocera wrote:
> The touchscreen on the WinBook TW100 and TW700 don't match the default
> display, with 0,0 touches being reported when touching at the bottom
> right of the screen.
>
> 1280,800 0,800
> +-------------+
> | |
> | |
> | |
> +-------------+
> 1280,0 0,0
>
> It's unfortunately impossible to detect this problem with data from the
> DSDT, or other auxiliary metadata, so fallback to quirking this specific
> model of tablet instead.
>
> Signed-off-by: Bastien Nocera <[email protected]>
> Reviewed-by: Benjamin Tissoires <[email protected]>
Applied, thank you.
> ---
> drivers/input/touchscreen/goodix.c | 37 +++++++++++++++++++++++++++++++++++++
> 1 file changed, 37 insertions(+)
>
> diff --git a/drivers/input/touchscreen/goodix.c
> b/drivers/input/touchscreen/goodix.c
> index b4d12e2..50bf6b1 100644
> --- a/drivers/input/touchscreen/goodix.c
> +++ b/drivers/input/touchscreen/goodix.c
> @@ -15,6 +15,7 @@
> */
>
> #include <linux/kernel.h>
> +#include <linux/dmi.h>
> #include <linux/i2c.h>
> #include <linux/input.h>
> #include <linux/input/mt.h>
> @@ -34,6 +35,7 @@ struct goodix_ts_data {
> int abs_y_max;
> unsigned int max_touch_num;
> unsigned int int_trigger_type;
> + bool rotated_screen;
> };
>
> #define GOODIX_MAX_HEIGHT 4096
> @@ -60,6 +62,30 @@ static const unsigned long goodix_irq_flags[] = {
> IRQ_TYPE_LEVEL_HIGH,
> };
>
> +/*
> + * Those tablets have their coords origin at the bottom right
> + * of the tablet, as if rotated 180 degrees
> + */
> +static const struct dmi_system_id rotated_screen[] = {
> +#if defined(CONFIG_DMI) && defined(CONFIG_X86)
> + {
> + .ident = "WinBook TW100",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
> + DMI_MATCH(DMI_PRODUCT_NAME, "TW100")
> + }
> + },
> + {
> + .ident = "WinBook TW700",
> + .matches = {
> + DMI_MATCH(DMI_SYS_VENDOR, "WinBook"),
> + DMI_MATCH(DMI_PRODUCT_NAME, "TW700")
> + },
> + },
> +#endif
> + {}
> +};
> +
> /**
> * goodix_i2c_read - read data from a register of the i2c slave device.
> *
> @@ -129,6 +155,11 @@ static void goodix_ts_report_touch(struct goodix_ts_data
> *ts, u8 *coor_data)
> int input_y = get_unaligned_le16(&coor_data[3]);
> int input_w = get_unaligned_le16(&coor_data[5]);
>
> + if (ts->rotated_screen) {
> + input_x = ts->abs_x_max - input_x;
> + input_y = ts->abs_y_max - input_y;
> + }
> +
> input_mt_slot(ts->input_dev, id);
> input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
> input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x);
> @@ -223,6 +254,12 @@ static void goodix_read_config(struct goodix_ts_data *ts)
> ts->abs_y_max = GOODIX_MAX_HEIGHT;
> ts->max_touch_num = GOODIX_MAX_CONTACTS;
> }
> +
> + ts->rotated_screen = dmi_check_system(rotated_screen);
> + if (ts->rotated_screen) {
> + dev_dbg(&ts->client->dev,
> + "Applying '180 degrees rotated screen' quirk\n");
> + }
> }
>
> /**
> --
> 2.4.3
--
Dmitry
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