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| author | Chris Zhong <zyw@rock-chips.com> | 2016-09-10 04:15:44 +0200 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2016-09-13 03:08:47 +0200 |
| commit | c7914e8dfa4032d24ef7af4c86b9c841ec6b74e6 (patch) | |
| tree | aa5def75ff343fa6f7c70ff96f588a12ec6141a6 | |
| parent | extcon: Introduce EXTCON_PROP_USB_SS property for SuperSpeed mode (diff) | |
| download | linux-c7914e8dfa4032d24ef7af4c86b9c841ec6b74e6.tar.xz linux-c7914e8dfa4032d24ef7af4c86b9c841ec6b74e6.zip | |
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: Chris Zhong <zyw@rock-chips.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
[cw00.choi: Add the description of HPD and full name of HPD]
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
| -rw-r--r-- | include/linux/extcon.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/extcon.h b/include/linux/extcon.h index b34d1ae9011f..5c35f9d1822c 100644 --- a/include/linux/extcon.h +++ b/include/linux/extcon.h @@ -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) /* |