disp: msm: dp: add support to request dp link clk through mmrm

This change adds the support to request the dp link clk rate
through the mmrm driver. In the case the system can not
support the rate, user space is notified of the failure and
dp is diconnected.

Change-Id: I4a074054ce42425ca940d4aec505723724736b44
Signed-off-by: Christina Oliveira <coliveir@codeaurora.org>

msm/dp/dp_parser.c

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2021, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/of_gpio.h>
@@ -609,6 +609,7 @@ static int dp_parser_clock(struct dp_parser *parser)
 	int core_clk_count = 0, link_clk_count = 0;
 	int strm0_clk_index = 0, strm1_clk_index = 0;
 	int strm0_clk_count = 0, strm1_clk_count = 0;
+	int clock_mmrm = 0;
 	const char *clk_name;
 	const char *core_clk = "core";
 	const char *strm0_clk = "strm0";
@@ -656,11 +657,16 @@ static int dp_parser_clock(struct dp_parser *parser)
 				&link_power->clk_config[link_clk_index];
 			strlcpy(clk->clk_name, clk_name, sizeof(clk->clk_name));
 			link_clk_index++;
-
-			if (!strcmp(clk_name, "link_clk"))
+			clock_mmrm = 0;
+			of_property_read_u32_index(dev->of_node, "clock-mmrm", i, &clock_mmrm);
+			if (clock_mmrm) {
+				clk->type = DSS_CLK_MMRM;
+				clk->mmrm.clk_id = clock_mmrm;
+			} else if (!strcmp(clk_name, "link_clk")) {
 				clk->type = DSS_CLK_PCLK;
-			else
+			} else {
 				clk->type = DSS_CLK_AHB;
+			}
 		} else if (dp_parser_check_prefix(strm0_clk, clk_name) &&
 			   strm0_clk_index < strm0_clk_count) {
 			struct dss_clk *clk =