This is a wrapper around the ZynqMP Display and DisplayPort drivers.
Signed-off-by: Hyun Kwon <hyun.kwon@xxxxxxxxxx>
Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
v8
- Support reserved memory through memory-region dt binding
v6
- Accomodate the migration of logical master from platform device to device
- Remove the duplicate license paragraphs
- Do complete forward declaration in the header
v5
- Add an error handling of pipeline initialization
v4
- Use the newly added xlnx pipeline calls to initialize drm device
v2
- Change the SPDX identifier format
---
---
drivers/gpu/drm/xlnx/Kconfig | 11 +++
drivers/gpu/drm/xlnx/Makefile | 3 +
drivers/gpu/drm/xlnx/zynqmp_dpsub.c | 158 ++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/xlnx/zynqmp_dpsub.h | 23 ++++++
4 files changed, 195 insertions(+)
create mode 100644 drivers/gpu/drm/xlnx/zynqmp_dpsub.c
create mode 100644 drivers/gpu/drm/xlnx/zynqmp_dpsub.h
diff --git a/drivers/gpu/drm/xlnx/Kconfig b/drivers/gpu/drm/xlnx/Kconfig
index 19fd7cd..7c5529c 100644
--- a/drivers/gpu/drm/xlnx/Kconfig
+++ b/drivers/gpu/drm/xlnx/Kconfig
@@ -10,3 +10,14 @@ config DRM_XLNX
display pipeline using Xilinx IPs in FPGA. This module
provides the kernel mode setting functionalities
for Xilinx display drivers.
+
+config DRM_ZYNQMP_DPSUB
+ tristate "ZynqMP DP Subsystem Driver"
+ depends on ARCH_ZYNQMP && OF && DRM_XLNX && COMMON_CLK
+ select DMA_ENGINE
+ select GENERIC_PHY
+ help
+ DRM KMS driver for ZynqMP DP Subsystem controller. Choose
+ this option if you have a Xilinx ZynqMP SoC with DisplayPort
+ subsystem. The driver provides the kernel mode setting
+ functionlaities for ZynqMP DP subsystem.
diff --git a/drivers/gpu/drm/xlnx/Makefile b/drivers/gpu/drm/xlnx/Makefile
index c60a281..064a05a 100644
--- a/drivers/gpu/drm/xlnx/Makefile
+++ b/drivers/gpu/drm/xlnx/Makefile
@@ -1,2 +1,5 @@
xlnx_drm-objs += xlnx_crtc.o xlnx_drv.o xlnx_fb.o xlnx_gem.o
obj-$(CONFIG_DRM_XLNX) += xlnx_drm.o
+
+zynqmp-dpsub-objs += zynqmp_disp.o zynqmp_dpsub.o zynqmp_dp.o
+obj-$(CONFIG_DRM_ZYNQMP_DPSUB) += zynqmp-dpsub.o
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
new file mode 100644
index 0000000..34e81d0
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP DP Subsystem Driver
+ *
+ * Copyright (C) 2017 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xxxxxxxxxx>
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include "xlnx_drv.h"
+
+#include "zynqmp_disp.h"
+#include "zynqmp_dp.h"
+#include "zynqmp_dpsub.h"
+
+static int
+zynqmp_dpsub_bind(struct device *dev, struct device *master, void *data)
+{
+ int ret;
+
+ ret = zynqmp_disp_bind(dev, master, data);
+ if (ret)
+ return ret;
+
+ /* zynqmp_disp should bind first, so zynqmp_dp encoder can find crtc */
+ ret = zynqmp_dp_bind(dev, master, data);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static void
+zynqmp_dpsub_unbind(struct device *dev, struct device *master, void *data)
+{
+ zynqmp_dp_unbind(dev, master, data);
+ zynqmp_disp_unbind(dev, master, data);
+}
+
+static const struct component_ops zynqmp_dpsub_component_ops = {
+ .bind = zynqmp_dpsub_bind,
+ .unbind = zynqmp_dpsub_unbind,
+};
+
+static int zynqmp_dpsub_probe(struct platform_device *pdev)
+{
+ struct zynqmp_dpsub *dpsub;
+ int ret;
+
+ dpsub = devm_kzalloc(&pdev->dev, sizeof(*dpsub), GFP_KERNEL);
+ if (!dpsub)
+ return -ENOMEM;
+
+ /* Sub-driver will access dpsub from drvdata */
+ platform_set_drvdata(pdev, dpsub);
+ pm_runtime_enable(&pdev->dev);
+
+ /*
+ * DP should be probed first so that the zynqmp_disp can set the output
+ * format accordingly.
+ */
+ ret = zynqmp_dp_probe(pdev);
+ if (ret)
+ goto err_pm;
+
+ ret = zynqmp_disp_probe(pdev);
+ if (ret)
+ goto err_dp;
+
+ ret = component_add(&pdev->dev, &zynqmp_dpsub_component_ops);
+ if (ret)
+ goto err_disp;
+
+ /* Try the reserved memory. Proceed if there's none */
+ of_reserved_mem_device_init(&pdev->dev);
+
+ /* Populate the sound child nodes */
+ ret = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to populate child nodes\n");
+ goto err_rmem;
+ }
+
+ dpsub->master = xlnx_drm_pipeline_init(&pdev->dev);
+ if (IS_ERR(dpsub->master)) {
+ dev_err(&pdev->dev, "failed to initialize the drm pipeline\n");
+ goto err_populate;
+ }
+
+ dev_info(&pdev->dev, "ZynqMP DisplayPort Subsystem driver probed");
+
+ return 0;
+
+err_populate:
+ of_platform_depopulate(&pdev->dev);
+err_rmem:
+ of_reserved_mem_device_release(&pdev->dev);
+ component_del(&pdev->dev, &zynqmp_dpsub_component_ops);
+err_disp:
+ zynqmp_disp_remove(pdev);
+err_dp:
+ zynqmp_dp_remove(pdev);
+err_pm:
+ pm_runtime_disable(&pdev->dev);
+ return ret;
+}
+
+static int zynqmp_dpsub_remove(struct platform_device *pdev)
+{
+ struct zynqmp_dpsub *dpsub = platform_get_drvdata(pdev);
+ int err, ret = 0;
+
+ xlnx_drm_pipeline_exit(dpsub->master);
+ of_platform_depopulate(&pdev->dev);
+ of_reserved_mem_device_release(&pdev->dev);
+ component_del(&pdev->dev, &zynqmp_dpsub_component_ops);
+
+ err = zynqmp_disp_remove(pdev);
+ if (err)
+ ret = -EIO;
+
+ err = zynqmp_dp_remove(pdev);
+ if (err)
+ ret = -EIO;
+
+ pm_runtime_disable(&pdev->dev);
+
+ return err;
+}
+
+static const struct of_device_id zynqmp_dpsub_of_match[] = {
+ { .compatible = "xlnx,zynqmp-dpsub-1.7", },
+ { /* end of table */ },
+};
+MODULE_DEVICE_TABLE(of, zynqmp_dpsub_of_match);
+
+static struct platform_driver zynqmp_dpsub_driver = {
+ .probe = zynqmp_dpsub_probe,
+ .remove = zynqmp_dpsub_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "zynqmp-display",
+ .of_match_table = zynqmp_dpsub_of_match,
+ },
+};
+
+module_platform_driver(zynqmp_dpsub_driver);
+
+MODULE_AUTHOR("Xilinx, Inc.");
+MODULE_DESCRIPTION("ZynqMP DP Subsystem Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.h b/drivers/gpu/drm/xlnx/zynqmp_dpsub.h
new file mode 100644
index 0000000..95239bb
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.h
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP DPSUB Subsystem Driver
+ *
+ * Copyright (C) 2017 - 2018 Xilinx, Inc.
+ *
+ * Author: Hyun Woo Kwon <hyun.kwon@xxxxxxxxxx>
+ */
+
+#ifndef _ZYNQMP_DPSUB_H_
+#define _ZYNQMP_DPSUB_H_
+
+struct device;
+struct zynqmp_dp;
+struct zynqmp_disp;
+
+struct zynqmp_dpsub {
+ struct zynqmp_dp *dp;
+ struct zynqmp_disp *disp;
+ struct device *master;
+};
+
+#endif /* _ZYNQMP_DPSUB_H_ */
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
