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Commit c7914e8d authored by Chris Zhong's avatar Chris Zhong Committed by Chanwoo Choi
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extcon: Introduce EXTCON_PROP_DISP_HPD property 



EXTCON_PROP_DISP_HPD is need by display port, if the system has no hpd
interrupt, this property can be used.
- HPD (Hot Plug Detect) send the signal whether display device is on or off
  to source device.

Signed-off-by: default avatarChris Zhong <zyw@rock-chips.com>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
[cw00.choi: Add the description of HPD and full name of HPD]
Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
parent 8457a1b4

include/linux/extcon.h

+12 −1
Original line number Diff line number Diff line
@@ -133,9 +133,20 @@ 
#define EXTCON_PROP_JACK_MAX		100

#define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)



/*

 * Properties of EXTCON_TYPE_DISP.

 *

 * - EXTCON_PROP_DISP_HPD (Hot Plug Detect)

 * @type:       integer (intval)

 * @value:      0 (no hpd) or 1 (hpd)

 * @default:    0 (no hpd)

 *

 */

#define EXTCON_PROP_DISP_HPD		150



/* Properties of EXTCON_TYPE_DISP. */

#define EXTCON_PROP_DISP_MIN		150

#define EXTCON_PROP_DISP_MAX		150

#define EXTCON_PROP_DISP_MAX		151

#define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)



/*