From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933495AbcGLPKJ (ORCPT ); Tue, 12 Jul 2016 11:10:09 -0400 Received: from mail-pa0-f68.google.com ([209.85.220.68]:34611 "EHLO mail-pa0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933365AbcGLPKC (ORCPT ); Tue, 12 Jul 2016 11:10:02 -0400 From: Chris Zhong To: dianders@chromium.org, tfiga@chromium.org, heiko@sntech.de, yzq@rock-chips.com, groeck@chromium.org, myungjoo.ham@samsung.com, cw00.choi@samsung.com, wulf@rock-chips.com, marcheu@chromium.org Cc: linux-rockchip@lists.infradead.org, Chris Zhong , linux-kernel@vger.kernel.org Subject: [v5 PATCH 1/5] extcon: Add Type-C and DP support Date: Tue, 12 Jul 2016 23:09:44 +0800 Message-Id: <1468336188-565-2-git-send-email-zyw@rock-chips.com> X-Mailer: git-send-email 2.6.3 In-Reply-To: <1468336188-565-1-git-send-email-zyw@rock-chips.com> References: <1468336188-565-1-git-send-email-zyw@rock-chips.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Signe-off-by: Chris Zhong Signed-off-by: Chris Zhong --- Changes in v5: - support get property Changes in v4: None Changes in v3: None Changes in v2: None Changes in v1: None drivers/extcon/extcon.c | 28 ++++++++++++++++++++++++++++ include/linux/extcon.h | 13 +++++++++++++ 2 files changed, 41 insertions(+) diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c index a1117db..2591b28 100644 --- 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, + .id = EXTCON_DISP_DP, + .name = "DP", + }, /* Miscellaneous external connector */ [EXTCON_DOCK] = { @@ -270,6 +275,7 @@ static bool is_extcon_property_supported(unsigned int id, switch (prop) { case EXTCON_PROP_USB_ID: case EXTCON_PROP_USB_VBUS: + case EXTCON_PROP_TYPEC_POLARITY: return true; default: break; @@ -286,6 +292,8 @@ static bool is_extcon_property_supported(unsigned int id, } case EXTCON_TYPE_DISP: switch (prop) { + case EXTCON_PROP_TYPEC_POLARITY: + return true; default: break; } @@ -547,6 +555,26 @@ int extcon_get_cable_property(struct extcon_dev *edev, unsigned int id, enum extcon_property prop, union extcon_property_value *val) { + struct extcon_cable *cable; + int index; + + if (!edev) + return -EINVAL; + + /* Check the property whether is supported or not */ + if (!is_extcon_property_supported(id, prop)) + return -EINVAL; + + /* Find the cable index of external connector by using id */ + index = find_cable_index_by_id(edev, id); + if (index < 0) + return index; + + /* Store the property value */ + cable = &edev->cables[index]; + + val->intval = cable->propval[prop].intval; + return 0; } diff --git a/include/linux/extcon.h b/include/linux/extcon.h index f6f0a8d..50ef87f 100644 --- a/include/linux/extcon.h +++ b/include/linux/extcon.h @@ -77,6 +77,7 @@ enum extcon_type { #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 /* DisplayPort */ /* Miscellaneous external connector */ #define EXTCON_DOCK 60 @@ -108,9 +109,13 @@ enum extcon_property { * - EXTCON_PROP_USB_USB * @type: integer (int value) * @value: 0 (low) or 1 (high) + * - EXTCON_PROP_TYPEC_POLARITY, + * @type: integer (int value) + * @value: 0 (normal) or 1 (flip) */ EXTCON_PROP_USB_ID = 0, EXTCON_PROP_USB_VBUS, + EXTCON_PROP_TYPEC_POLARITY, /* Properties of EXTCON_TYPE_CHG. */ /* Properties of EXTCON_TYPE_JACK. */ @@ -225,6 +230,14 @@ extern int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id); extern int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id, bool cable_state); +extern int extcon_get_cable_property(struct extcon_dev *edev, unsigned int id, + enum extcon_property prop, + union extcon_property_value *val); + +extern int extcon_set_cable_property(struct extcon_dev *edev, unsigned int id, + enum extcon_property prop, + union extcon_property_value val); + /* * Following APIs are to monitor every action of a notifier. * Registrar gets notified for every external port of a connection device. -- 2.6.3