platform/x86: touchscreen_dmi: Add swap-x-y quirk for Goodix touchscreen on Estar...

The Estar Beauty HD (MID 7316R) tablet uses a Goodix touchscreen,
with the X and Y coordinates swapped compared to the LCD panel.

Add a touchscreen_dmi entry for this adding a "touchscreen-swapped-x-y"
device-property to the i2c-client instantiated for this device before
the driver binds.

This is the first entry of a Goodix touchscreen to touchscreen_dmi.c,
so far DMI quirks for Goodix touchscreen's have been added directly
to drivers/input/touchscreen/goodix.c. Currently there are 3
DMI tables in goodix.c:
1. rotated_screen[] for devices where the touchscreen is rotated
   180 degrees vs the LCD panel
2. inverted_x_screen[] for devices where the X axis is inverted
3. nine_bytes_report[] for devices which use a non standard touch
   report size

Arguably only 3. really needs to be inside the driver and the other
2 cases are better handled through the generic touchscreen DMI quirk
mechanism from touchscreen_dmi.c, which allows adding device-props to
any i2c-client. Esp. now that goodix.c is using the generic
touchscreen_properties code.

Alternative to the approach from this patch we could add a 4th
dmi_system_id table for devices with swapped-x-y axis to goodix.c,
but that seems undesirable.

Cc: Bastien Nocera <hadess@hadess.net>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20201224135158.10976-1-hdegoede@redhat.com

diff --git a/drivers/platform/x86/touchscreen_dmi.c b/drivers/platform/x86/touchscreen_dmi.c
index 5783139..c4de932 100644 (file)
--- a/drivers/platform/x86/touchscreen_dmi.c
+++ b/drivers/platform/x86/touchscreen_dmi.c
@@ -263,6 +263,16 @@ static const struct ts_dmi_data digma_citi_e200_data = {
        .properties     = digma_citi_e200_props,
 };
 
+static const struct property_entry estar_beauty_hd_props[] = {
+       PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
+       { }
+};
+
+static const struct ts_dmi_data estar_beauty_hd_data = {
+       .acpi_name      = "GDIX1001:00",
+       .properties     = estar_beauty_hd_props,
+};
+
 static const struct property_entry gp_electronic_t701_props[] = {
        PROPERTY_ENTRY_U32("touchscreen-size-x", 960),
        PROPERTY_ENTRY_U32("touchscreen-size-y", 640),
@@ -943,6 +953,14 @@ const struct dmi_system_id touchscreen_dmi_table[] = {
                },
        },
        {
+               /* Estar Beauty HD (MID 7316R) */
+               .driver_data = (void *)&estar_beauty_hd_data,
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Estar"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "eSTAR BEAUTY HD Intel Quad core"),
+               },
+       },
+       {
                /* GP-electronic T701 */
                .driver_data = (void *)&gp_electronic_t701_data,
                .matches = {