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). At this mode, there
is some information need to be supplied by PowerDelivery or other
mode detecter: port orientation and pin assignments, so add these
2 virtual cable: EXTCON_TYPEC_POLARITY and EXTCON_TYPEC_PIN_ASSIGN.
If EXTCON_TYPEC_POLARITY is attached, the Type-C get flip orientation.
IF EXTCON_TYPEC_PIN_ASSIGN is attached, Type-C get Pin_Assignment_C(for
DP only mode) or Pin_Assignment_D(for DP + USB3 mode), the default
Assignment is A(for DP only mode) or B(for DP + USB3 mode).
Signed-off-by: Chris Zhong <z...@rock-chips.com>
---
Changes in v4:
- remove DP alt mode
Changes in v3: None
Changes in v2: None
Changes in v1: None
drivers/extcon/extcon.c | 5 +++++
include/linux/extcon.h | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 21a123c..44a575c 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -53,6 +53,10 @@ static const char *extcon_name[] = {
[EXTCON_CHG_USB_FAST] = "FAST-CHARGER",
[EXTCON_CHG_USB_SLOW] = "SLOW-CHARGER",
+ /* Type-c connector */
+ [EXTCON_TYPEC_POLARITY] = "TYPE-C-POLARITY",
+ [EXTCON_TYPEC_PIN_ASSIGN] = "TYPE-C-PIN-ASSIGN",
+
/* Jack external connector */
[EXTCON_JACK_MICROPHONE] = "MICROPHONE",
[EXTCON_JACK_HEADPHONE] = "HEADPHONE",
@@ -68,6 +72,7 @@ static const char *extcon_name[] = {
[EXTCON_DISP_MHL] = "MHL",
[EXTCON_DISP_DVI] = "DVI",
[EXTCON_DISP_VGA] = "VGA",
+ [EXTCON_DISP_DP] = "DP",
/* Miscellaneous external connector */
[EXTCON_DOCK] = "DOCK",
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 7abf674..38a5640 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -45,6 +45,10 @@
#define EXTCON_CHG_USB_FAST 9
#define EXTCON_CHG_USB_SLOW 10
+/* Type-c connector */
+#define EXTCON_TYPEC_POLARITY 11 /* Typec-C plug orientation */
+#define EXTCON_TYPEC_PIN_ASSIGN 12 /* Typec-C pin Assignment */
+
/* Jack external connector */
#define EXTCON_JACK_MICROPHONE 20
#define EXTCON_JACK_HEADPHONE 21
@@ -60,6 +64,7 @@
#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
--
2.6.3
