1 files changed, 293 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dc/dc-drv.c b/drivers/gpu/drm/imx/dc/dc-drv.c
new file mode 100644
index 000000000000..04f021d2d6cf
--- /dev/null
+++ b/drivers/gpu/drm/imx/dc/dc-drv.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2024 NXP
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/clients/drm_client_setup.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_dma.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_modeset_helper.h>
+#include <drm/drm_of.h>
+
+#include "dc-de.h"
+#include "dc-drv.h"
+#include "dc-pe.h"
+
+struct dc_priv {
+	struct drm_device *drm;
+	struct clk *clk_cfg;
+};
+
+DEFINE_DRM_GEM_DMA_FOPS(dc_drm_driver_fops);
+
+static struct drm_driver dc_drm_driver = {
+	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
+	DRM_GEM_DMA_DRIVER_OPS,
+	DRM_FBDEV_DMA_DRIVER_OPS,
+	.fops = &dc_drm_driver_fops,
+	.name = "imx8-dc",
+	.desc = "i.MX8 DC DRM graphics",
+	.major = 1,
+	.minor = 0,
+	.patchlevel = 0,
+};
+
+static void
+dc_add_components(struct device *dev, struct component_match **matchptr)
+{
+	struct device_node *child, *grandchild;
+
+	for_each_available_child_of_node(dev->of_node, child) {
+		/* The interrupt controller is not a component. */
+		if (of_device_is_compatible(child, "fsl,imx8qxp-dc-intc"))
+			continue;
+
+		drm_of_component_match_add(dev, matchptr, component_compare_of,
+					   child);
+
+		for_each_available_child_of_node(child, grandchild)
+			drm_of_component_match_add(dev, matchptr,
+						   component_compare_of,
+						   grandchild);
+	}
+}
+
+static int dc_drm_component_bind_all(struct dc_drm_device *dc_drm)
+{
+	struct drm_device *drm = &dc_drm->base;
+	int ret;
+
+	ret = component_bind_all(drm->dev, dc_drm);
+	if (ret)
+		return ret;
+
+	dc_de_post_bind(dc_drm);
+	dc_pe_post_bind(dc_drm);
+
+	return 0;
+}
+
+static void dc_drm_component_unbind_all(void *ptr)
+{
+	struct dc_drm_device *dc_drm = ptr;
+	struct drm_device *drm = &dc_drm->base;
+
+	component_unbind_all(drm->dev, dc_drm);
+}
+
+static int dc_drm_bind(struct device *dev)
+{
+	struct dc_priv *priv = dev_get_drvdata(dev);
+	struct dc_drm_device *dc_drm;
+	struct drm_device *drm;
+	int ret;
+
+	dc_drm = devm_drm_dev_alloc(dev, &dc_drm_driver, struct dc_drm_device,
+				    base);
+	if (IS_ERR(dc_drm))
+		return PTR_ERR(dc_drm);
+
+	drm = &dc_drm->base;
+
+	ret = dc_drm_component_bind_all(dc_drm);
+	if (ret)
+		return ret;
+
+	ret = devm_add_action_or_reset(dev, dc_drm_component_unbind_all,
+				       dc_drm);
+	if (ret)
+		return ret;
+
+	ret = dc_kms_init(dc_drm);
+	if (ret)
+		return ret;
+
+	ret = drm_dev_register(drm, 0);
+	if (ret) {
+		dev_err(dev, "failed to register drm device: %d\n", ret);
+		goto err;
+	}
+
+	drm_client_setup_with_fourcc(drm, DRM_FORMAT_XRGB8888);
+
+	priv->drm = drm;
+
+	return 0;
+
+err:
+	dc_kms_uninit(dc_drm);
+
+	return ret;
+}
+
+static void dc_drm_unbind(struct device *dev)
+{
+	struct dc_priv *priv = dev_get_drvdata(dev);
+	struct dc_drm_device *dc_drm = to_dc_drm_device(priv->drm);
+	struct drm_device *drm = &dc_drm->base;
+
+	priv->drm = NULL;
+	drm_dev_unplug(drm);
+	dc_kms_uninit(dc_drm);
+	drm_atomic_helper_shutdown(drm);
+}
+
+static const struct component_master_ops dc_drm_ops = {
+	.bind = dc_drm_bind,
+	.unbind = dc_drm_unbind,
+};
+
+static int dc_probe(struct platform_device *pdev)
+{
+	struct component_match *match = NULL;
+	struct dc_priv *priv;
+	int ret;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->clk_cfg = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(priv->clk_cfg))
+		return dev_err_probe(&pdev->dev, PTR_ERR(priv->clk_cfg),
+				     "failed to get cfg clock\n");
+
+	dev_set_drvdata(&pdev->dev, priv);
+
+	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	ret = devm_pm_runtime_enable(&pdev->dev);
+	if (ret)
+		return ret;
+
+	ret = devm_of_platform_populate(&pdev->dev);
+	if (ret)
+		return ret;
+
+	dc_add_components(&pdev->dev, &match);
+
+	ret = component_master_add_with_match(&pdev->dev, &dc_drm_ops, match);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret,
+				     "failed to add component master\n");
+
+	return 0;
+}
+
+static void dc_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &dc_drm_ops);
+}
+
+static int dc_runtime_suspend(struct device *dev)
+{
+	struct dc_priv *priv = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(priv->clk_cfg);
+
+	return 0;
+}
+
+static int dc_runtime_resume(struct device *dev)
+{
+	struct dc_priv *priv = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_prepare_enable(priv->clk_cfg);
+	if (ret)
+		dev_err(dev, "failed to enable cfg clock: %d\n", ret);
+
+	return ret;
+}
+
+static int dc_suspend(struct device *dev)
+{
+	struct dc_priv *priv = dev_get_drvdata(dev);
+
+	return drm_mode_config_helper_suspend(priv->drm);
+}
+
+static int dc_resume(struct device *dev)
+{
+	struct dc_priv *priv = dev_get_drvdata(dev);
+
+	return drm_mode_config_helper_resume(priv->drm);
+}
+
+static void dc_shutdown(struct platform_device *pdev)
+{
+	struct dc_priv *priv = dev_get_drvdata(&pdev->dev);
+
+	drm_atomic_helper_shutdown(priv->drm);
+}
+
+static const struct dev_pm_ops dc_pm_ops = {
+	RUNTIME_PM_OPS(dc_runtime_suspend, dc_runtime_resume, NULL)
+	SYSTEM_SLEEP_PM_OPS(dc_suspend, dc_resume)
+};
+
+static const struct of_device_id dc_dt_ids[] = {
+	{ .compatible = "fsl,imx8qxp-dc", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dc_dt_ids);
+
+static struct platform_driver dc_driver = {
+	.probe = dc_probe,
+	.remove = dc_remove,
+	.shutdown = dc_shutdown,
+	.driver = {
+		.name = "imx8-dc",
+		.of_match_table	= dc_dt_ids,
+		.pm = pm_sleep_ptr(&dc_pm_ops),
+	},
+};
+
+static struct platform_driver * const dc_drivers[] = {
+	&dc_cf_driver,
+	&dc_de_driver,
+	&dc_ed_driver,
+	&dc_fg_driver,
+	&dc_fl_driver,
+	&dc_fw_driver,
+	&dc_ic_driver,
+	&dc_lb_driver,
+	&dc_pe_driver,
+	&dc_tc_driver,
+	&dc_driver,
+};
+
+static int __init dc_drm_init(void)
+{
+	return platform_register_drivers(dc_drivers, ARRAY_SIZE(dc_drivers));
+}
+
+static void __exit dc_drm_exit(void)
+{
+	platform_unregister_drivers(dc_drivers, ARRAY_SIZE(dc_drivers));
+}
+
+module_init(dc_drm_init);
+module_exit(dc_drm_exit);
+
+MODULE_DESCRIPTION("i.MX8 Display Controller DRM Driver");
+MODULE_AUTHOR("Liu Ying <victor.liu@nxp.com>");
+MODULE_LICENSE("GPL");