extcon: Add EXTCON_DISP_DP and the property for USB Type-C

Add EXTCON_DISP_DP for the Display external connector. For Type-C
connector the DisplayPort can work as an Alternate Mode(VESA DisplayPort
Alt Mode on USB Type-C Standard). The Type-C support both normal
and flipped orientation, so add a property to extcon.

Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Chris Zhong <zyw@rock-chips.com>
Tested-by: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 8fde4be..a0a1eea 100644 (file)
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -157,6 +157,11 @@ struct __extcon_info {
                .id = EXTCON_DISP_VGA,
                .name = "VGA",
        },
+       [EXTCON_DISP_DP] = {
+               .type = EXTCON_TYPE_DISP | EXTCON_TYPE_USB,
+               .id = EXTCON_DISP_DP,
+               .name = "DP",
+       },
 
        /* Miscellaneous external connector */
        [EXTCON_DOCK] = {

diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 162c46a..ad7a160 100644 (file)
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -69,6 +69,7 @@
 #define EXTCON_DISP_MHL                41      /* Mobile High-Definition Link */
 #define EXTCON_DISP_DVI                42      /* Digital Visual Interface */
 #define EXTCON_DISP_VGA                43      /* Video Graphics Array */
+#define EXTCON_DISP_DP         44      /* Display Port */
 
 /* Miscellaneous external connector */
 #define EXTCON_DOCK            60
@@ -102,11 +103,16 @@
  * @type:      integer (intval)
  * @value:     0 (low) or 1 (high)
  * @default:   0 (low)
+ * - EXTCON_PROP_USB_TYPEC_POLARITY
+ * @type:      integer (intval)
+ * @value:     0 (normal) or 1 (flip)
+ * @default:   0 (normal)
  */
 #define EXTCON_PROP_USB_VBUS           0
+#define EXTCON_PROP_USB_TYPEC_POLARITY 1
 
 #define EXTCON_PROP_USB_MIN            0
-#define EXTCON_PROP_USB_MAX            0
+#define EXTCON_PROP_USB_MAX            1
 #define EXTCON_PROP_USB_CNT    (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
 
 /* Properties of EXTCON_TYPE_CHG. */