Merge branch 'next' into for-linus
[sfrench/cifs-2.6.git] / drivers / input / touchscreen / goodix.c
index d3f44a8577f5f627c05dcb1546d7f5582a915de1..4d113c9e4b77103224924128d1d033af21b4e552 100644 (file)
@@ -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 coordinates 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 +254,11 @@ 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");
 }
 
 /**