disp: msm: dp: Move required drm_dp_link functions to downstream

On the latest kernel, several drm_dp_link functions were removed.
This change moves the functions needed downstream.

Change-Id: I0a76c52edff450d8bd33edffb9da41c1933b9681
Signed-off-by: Samantha Tran <samtran@codeaurora.org>
Signed-off-by: Nilaan Gunabalachandran <ngunabal@codeaurora.org>

msm/dp/dp_link.h

@@ -1,6 +1,26 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
+ *
+ * Copyright (c) 2008 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
  */
 
 #ifndef _DP_LINK_H_
@@ -15,6 +35,22 @@
 #define DP_PHY_TEST_PATTERN_CP2520_2	0x6
 #define DP_PHY_TEST_PATTERN_CP2520_3	0x7
 
+struct drm_dp_aux;
+
+#define DP_LINK_CAP_ENHANCED_FRAMING (1 << 0)
+
+struct drm_dp_link {
+	unsigned char revision;
+	unsigned int rate;
+	unsigned int num_lanes;
+	unsigned long capabilities;
+};
+
+int dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link);
+int dp_link_power_up(struct drm_dp_aux *aux, struct drm_dp_link *link);
+int dp_link_power_down(struct drm_dp_aux *aux, struct drm_dp_link *link);
+int dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link);
+
 enum dp_link_voltage_level {
 	DP_LINK_VOLTAGE_LEVEL_0,
 	DP_LINK_VOLTAGE_LEVEL_1,