Display drivers kernel project initial snapshot

This change brings msm display driver including sde,
dp, dsi, rotator, dsi pll and dp pll from base 4.19 kernel
project. It is first source code snapshot from base kernel project.

Change-Id: Iec864c064ce5ea04e170f24414c728684002f284
Signed-off-by: Narendra Muppalla <NarendraM@codeaurora.org>

msm/dsi/dsi_display_test.c

@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include "dsi_display_test.h"
+
+static void dsi_display_test_dump_modes(struct dsi_display_mode *mode, u32
+					count)
+{
+}
+
+static void dsi_display_test_work(struct work_struct *work)
+{
+	struct dsi_display_test *test;
+	struct dsi_display *display;
+	struct dsi_display_mode *modes;
+	u32 count = 0;
+	int rc = 0;
+
+	test = container_of(work, struct dsi_display_test, test_work);
+
+	display = test->display;
+	rc = dsi_display_get_mode_count(display, &count);
+	if (rc) {
+		pr_err("failed to get modes count, rc=%d\n", rc);
+		goto test_fail;
+	}
+
+	rc = dsi_display_get_modes(display, &modes);
+	if (rc) {
+		pr_err("failed to get modes, rc=%d\n", rc);
+		goto test_fail_free_modes;
+	}
+
+	dsi_display_test_dump_modes(modes, count);
+
+	rc = dsi_display_set_mode(display, &modes[0], 0x0);
+	if (rc) {
+		pr_err("failed to set mode, rc=%d\n", rc);
+		goto test_fail_free_modes;
+	}
+
+	rc = dsi_display_prepare(display);
+	if (rc) {
+		pr_err("failed to prepare display, rc=%d\n", rc);
+		goto test_fail_free_modes;
+	}
+
+	rc = dsi_display_enable(display);
+	if (rc) {
+		pr_err("failed to enable display, rc=%d\n", rc);
+		goto test_fail_unprep_disp;
+	}
+	return;
+
+test_fail_unprep_disp:
+	if (rc) {
+		pr_err("failed to unprep display, rc=%d\n", rc);
+		goto test_fail_free_modes;
+	}
+
+test_fail_free_modes:
+	kfree(modes);
+test_fail:
+	return;
+}
+
+int dsi_display_test_init(struct dsi_display *display)
+{
+	static int done;
+	int rc = 0;
+	struct dsi_display_test *test;
+
+	if (done)
+		return rc;
+
+	done = 1;
+	if (!display) {
+		pr_err("Invalid params\n");
+		return -EINVAL;
+	}
+
+	test = kzalloc(sizeof(*test), GFP_KERNEL);
+	if (!test)
+		return -ENOMEM;
+
+	test->display = display;
+	INIT_WORK(&test->test_work, dsi_display_test_work);
+
+	dsi_display_test_work(&test->test_work);
+	return rc;
+}