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/sde/sde_irq.c

@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015-2019, The Linux Foundation. All rights reserved.
+ */
+
+#define pr_fmt(fmt)	"[drm:%s:%d] " fmt, __func__, __LINE__
+
+#include <linux/irqdomain.h>
+#include <linux/irq.h>
+#include <linux/kthread.h>
+
+#include "sde_irq.h"
+#include "sde_core_irq.h"
+
+uint32_t g_sde_irq_status;
+
+void sde_irq_update(struct msm_kms *msm_kms, bool enable)
+{
+	struct sde_kms *sde_kms = to_sde_kms(msm_kms);
+
+	if (!msm_kms || !sde_kms) {
+		SDE_ERROR("invalid kms arguments\n");
+		return;
+	}
+
+	sde_kms->irq_enabled = enable;
+
+	if (enable)
+		enable_irq(sde_kms->irq_num);
+	else
+		disable_irq(sde_kms->irq_num);
+}
+
+irqreturn_t sde_irq(struct msm_kms *kms)
+{
+	struct sde_kms *sde_kms = to_sde_kms(kms);
+	u32 interrupts;
+
+	sde_kms->hw_intr->ops.get_interrupt_sources(sde_kms->hw_intr,
+			&interrupts);
+
+	/* store irq status in case of irq-storm debugging */
+	g_sde_irq_status = interrupts;
+
+	/*
+	 * Taking care of MDP interrupt
+	 */
+	if (interrupts & IRQ_SOURCE_MDP) {
+		interrupts &= ~IRQ_SOURCE_MDP;
+		sde_core_irq(sde_kms);
+	}
+
+	/*
+	 * Routing all other interrupts to external drivers
+	 */
+	while (interrupts) {
+		irq_hw_number_t hwirq = fls(interrupts) - 1;
+		unsigned int mapping;
+		int rc;
+
+		mapping = irq_find_mapping(sde_kms->irq_controller.domain,
+				hwirq);
+		if (mapping == 0) {
+			SDE_EVT32(hwirq, SDE_EVTLOG_ERROR);
+			goto error;
+		}
+
+		rc = generic_handle_irq(mapping);
+		if (rc < 0) {
+			SDE_EVT32(hwirq, mapping, rc, SDE_EVTLOG_ERROR);
+			goto error;
+		}
+
+		interrupts &= ~(1 << hwirq);
+	}
+
+	return IRQ_HANDLED;
+
+error:
+	/* bad situation, inform irq system, it may disable overall MDSS irq */
+	return IRQ_NONE;
+}
+
+void sde_irq_preinstall(struct msm_kms *kms)
+{
+	struct sde_kms *sde_kms = to_sde_kms(kms);
+
+	if (!sde_kms->dev || !sde_kms->dev->dev) {
+		pr_err("invalid device handles\n");
+		return;
+	}
+
+	sde_core_irq_preinstall(sde_kms);
+
+	sde_kms->irq_num = platform_get_irq(
+				to_platform_device(sde_kms->dev->dev),
+				0);
+	if (sde_kms->irq_num < 0) {
+		SDE_ERROR("invalid irq number %d\n", sde_kms->irq_num);
+		return;
+	}
+
+	/* disable irq until power event enables it */
+	if (!sde_kms->splash_data.num_splash_displays && !sde_kms->irq_enabled)
+		irq_set_status_flags(sde_kms->irq_num, IRQ_NOAUTOEN);
+}
+
+int sde_irq_postinstall(struct msm_kms *kms)
+{
+	struct sde_kms *sde_kms = to_sde_kms(kms);
+	int rc;
+
+	if (!kms) {
+		SDE_ERROR("invalid parameters\n");
+		return -EINVAL;
+	}
+
+	rc = sde_core_irq_postinstall(sde_kms);
+
+	return rc;
+}
+
+void sde_irq_uninstall(struct msm_kms *kms)
+{
+	struct sde_kms *sde_kms = to_sde_kms(kms);
+
+	if (!kms) {
+		SDE_ERROR("invalid parameters\n");
+		return;
+	}
+
+	sde_core_irq_uninstall(sde_kms);
+	sde_core_irq_domain_fini(sde_kms);
+}