From d926695cc5680edfff9cfef36a14933ee3585fbf Mon Sep 17 00:00:00 2001
From: Michal Simek <michal.simek@xilinx.com>
Date: Wed, 23 Feb 2022 15:52:03 +0100
Subject: [PATCH] dma: xilinx: Add Display Port DMA driver
Display Port (DP) has own dma driver that's why add this skeleton driver
only for handling power domain setting and send configuration object to
PMUFW to enable it.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/fe8bc313bcd430b04e9fa6fb770d5799ef28b350.1645627920.git.michal.simek@xilinx.com
---
drivers/dma/Kconfig | 7 +++++++
drivers/dma/Makefile | 1 +
drivers/dma/xilinx_dpdma.c | 43 ++++++++++++++++++++++++++++++++++++++
3 files changed, 51 insertions(+)
create mode 100644 drivers/dma/xilinx_dpdma.c
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 9cacea88d0..0af5460421 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -68,6 +68,13 @@ config APBH_DMA
help
Enable APBH DMA driver.
+config XILINX_DPDMA
+ bool "Enable ZynqMP Display Port DMA driver"
+ depends on DMA && ZYNQMP_POWER_DOMAIN
+ help
+ Enable support for Xilinx ZynqMP Display DMA driver. Currently
+ this file is used as placeholder for driver. The main reason is
+ to record compatible string and calling power domain driver.
if APBH_DMA
config APBH_DMA_BURST
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index afab324461..a75572fe5d 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -13,5 +13,6 @@ obj-$(CONFIG_SANDBOX_DMA) += sandbox-dma-test.o
obj-$(CONFIG_TI_KSNAV) += keystone_nav.o keystone_nav_cfg.o
obj-$(CONFIG_TI_EDMA3) += ti-edma3.o
obj-$(CONFIG_DMA_LPC32XX) += lpc32xx_dma.o
+obj-$(CONFIG_XILINX_DPDMA) += xilinx_dpdma.o
obj-y += ti/
diff --git a/drivers/dma/xilinx_dpdma.c b/drivers/dma/xilinx_dpdma.c
new file mode 100644
index 0000000000..d4ee21dfc0
--- /dev/null
+++ b/drivers/dma/xilinx_dpdma.c
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021 Xilinx Inc.
+ */
+
+#include <common.h>
+#include <cpu_func.h>
+#include <dm.h>
+#include <dma.h>
+#include <dma-uclass.h>
+#include <errno.h>
+#include <dm/device_compat.h>
+
+/**
+ * struct zynqmp_dpdma_priv - Private structure
+ * @dev: Device uclass for video_ops
+ */
+struct zynqmp_dpdma_priv {
+ struct udevice *dev;
+};
+
+static int zynqmp_dpdma_probe(struct udevice *dev)
+{
+ /* Only placeholder for power domain driver */
+ return 0;
+}
+
+static const struct dma_ops zynqmp_dpdma_ops = {
+};
+
+static const struct udevice_id zynqmp_dpdma_ids[] = {
+ { .compatible = "xlnx,zynqmp-dpdma" },
+ { }
+};
+
+U_BOOT_DRIVER(zynqmp_dpdma) = {
+ .name = "zynqmp_dpdma",
+ .id = UCLASS_DMA,
+ .of_match = zynqmp_dpdma_ids,
+ .ops = &zynqmp_dpdma_ops,
+ .probe = zynqmp_dpdma_probe,
+ .priv_auto = sizeof(struct zynqmp_dpdma_priv),
+};
--
2.39.5