1 files changed, 311 insertions, 0 deletions

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
new file mode 100644
index 000000000..73ee7f25f
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
@@ -0,0 +1,311 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Hisilicon Kirin SoCs drm master driver
+ *
+ * Copyright (c) 2016 Linaro Limited.
+ * Copyright (c) 2014-2016 HiSilicon Limited.
+ *
+ * Author:
+ *	Xinliang Liu <z.liuxinliang@hisilicon.com>
+ *	Xinliang Liu <xinliang.liu@linaro.org>
+ *	Xinwei Kong <kong.kongxinwei@hisilicon.com>
+ */
+
+#include <linux/of_platform.h>
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_module.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "kirin_drm_drv.h"
+
+#define KIRIN_MAX_PLANE	2
+
+struct kirin_drm_private {
+	struct kirin_crtc crtc;
+	struct kirin_plane planes[KIRIN_MAX_PLANE];
+	void *hw_ctx;
+};
+
+static int kirin_drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
+			       struct drm_plane *plane,
+			       const struct kirin_drm_data *driver_data)
+{
+	struct device_node *port;
+	int ret;
+
+	/* set crtc port so that
+	 * drm_of_find_possible_crtcs call works
+	 */
+	port = of_get_child_by_name(dev->dev->of_node, "port");
+	if (!port) {
+		DRM_ERROR("no port node found in %pOF\n", dev->dev->of_node);
+		return -EINVAL;
+	}
+	of_node_put(port);
+	crtc->port = port;
+
+	ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
+					driver_data->crtc_funcs, NULL);
+	if (ret) {
+		DRM_ERROR("failed to init crtc.\n");
+		return ret;
+	}
+
+	drm_crtc_helper_add(crtc, driver_data->crtc_helper_funcs);
+
+	return 0;
+}
+
+static int kirin_drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
+				enum drm_plane_type type,
+				const struct kirin_drm_data *data)
+{
+	int ret = 0;
+
+	ret = drm_universal_plane_init(dev, plane, 1, data->plane_funcs,
+				       data->channel_formats,
+				       data->channel_formats_cnt,
+				       NULL, type, NULL);
+	if (ret) {
+		DRM_ERROR("fail to init plane, ch=%d\n", 0);
+		return ret;
+	}
+
+	drm_plane_helper_add(plane, data->plane_helper_funcs);
+
+	return 0;
+}
+
+static void kirin_drm_private_cleanup(struct drm_device *dev)
+{
+	struct kirin_drm_private *kirin_priv = dev->dev_private;
+	struct kirin_drm_data *data;
+
+	data = (struct kirin_drm_data *)of_device_get_match_data(dev->dev);
+	if (data->cleanup_hw_ctx)
+		data->cleanup_hw_ctx(kirin_priv->hw_ctx);
+
+	devm_kfree(dev->dev, kirin_priv);
+	dev->dev_private = NULL;
+}
+
+static int kirin_drm_private_init(struct drm_device *dev,
+				  const struct kirin_drm_data *driver_data)
+{
+	struct platform_device *pdev = to_platform_device(dev->dev);
+	struct kirin_drm_private *kirin_priv;
+	struct drm_plane *prim_plane;
+	enum drm_plane_type type;
+	void *ctx;
+	int ret;
+	u32 ch;
+
+	kirin_priv = devm_kzalloc(dev->dev, sizeof(*kirin_priv), GFP_KERNEL);
+	if (!kirin_priv) {
+		DRM_ERROR("failed to alloc kirin_drm_private\n");
+		return -ENOMEM;
+	}
+
+	ctx = driver_data->alloc_hw_ctx(pdev, &kirin_priv->crtc.base);
+	if (IS_ERR(ctx)) {
+		DRM_ERROR("failed to initialize kirin_priv hw ctx\n");
+		return -EINVAL;
+	}
+	kirin_priv->hw_ctx = ctx;
+
+	/*
+	 * plane init
+	 * TODO: Now only support primary plane, overlay planes
+	 * need to do.
+	 */
+	for (ch = 0; ch < driver_data->num_planes; ch++) {
+		if (ch == driver_data->prim_plane)
+			type = DRM_PLANE_TYPE_PRIMARY;
+		else
+			type = DRM_PLANE_TYPE_OVERLAY;
+		ret = kirin_drm_plane_init(dev, &kirin_priv->planes[ch].base,
+					   type, driver_data);
+		if (ret)
+			return ret;
+		kirin_priv->planes[ch].ch = ch;
+		kirin_priv->planes[ch].hw_ctx = ctx;
+	}
+
+	/* crtc init */
+	prim_plane = &kirin_priv->planes[driver_data->prim_plane].base;
+	ret = kirin_drm_crtc_init(dev, &kirin_priv->crtc.base,
+				  prim_plane, driver_data);
+	if (ret)
+		return ret;
+	kirin_priv->crtc.hw_ctx = ctx;
+	dev->dev_private = kirin_priv;
+
+	return 0;
+}
+
+static int kirin_drm_kms_init(struct drm_device *dev,
+			      const struct kirin_drm_data *driver_data)
+{
+	int ret;
+
+	/* dev->mode_config initialization */
+	drm_mode_config_init(dev);
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+	dev->mode_config.max_width = driver_data->config_max_width;
+	dev->mode_config.max_height = driver_data->config_max_width;
+	dev->mode_config.funcs = driver_data->mode_config_funcs;
+
+	/* display controller init */
+	ret = kirin_drm_private_init(dev, driver_data);
+	if (ret)
+		goto err_mode_config_cleanup;
+
+	/* bind and init sub drivers */
+	ret = component_bind_all(dev->dev, dev);
+	if (ret) {
+		DRM_ERROR("failed to bind all component.\n");
+		goto err_private_cleanup;
+	}
+
+	/* vblank init */
+	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+	if (ret) {
+		DRM_ERROR("failed to initialize vblank.\n");
+		goto err_unbind_all;
+	}
+
+	/* reset all the states of crtc/plane/encoder/connector */
+	drm_mode_config_reset(dev);
+
+	/* init kms poll for handling hpd */
+	drm_kms_helper_poll_init(dev);
+
+	return 0;
+
+err_unbind_all:
+	component_unbind_all(dev->dev, dev);
+err_private_cleanup:
+	kirin_drm_private_cleanup(dev);
+err_mode_config_cleanup:
+	drm_mode_config_cleanup(dev);
+	return ret;
+}
+
+static int kirin_drm_kms_cleanup(struct drm_device *dev)
+{
+	drm_kms_helper_poll_fini(dev);
+	kirin_drm_private_cleanup(dev);
+	drm_mode_config_cleanup(dev);
+
+	return 0;
+}
+
+static int kirin_drm_bind(struct device *dev)
+{
+	struct kirin_drm_data *driver_data;
+	struct drm_device *drm_dev;
+	int ret;
+
+	driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
+	if (!driver_data)
+		return -EINVAL;
+
+	drm_dev = drm_dev_alloc(driver_data->driver, dev);
+	if (IS_ERR(drm_dev))
+		return PTR_ERR(drm_dev);
+	dev_set_drvdata(dev, drm_dev);
+
+	/* display controller init */
+	ret = kirin_drm_kms_init(drm_dev, driver_data);
+	if (ret)
+		goto err_drm_dev_put;
+
+	ret = drm_dev_register(drm_dev, 0);
+	if (ret)
+		goto err_kms_cleanup;
+
+	drm_fbdev_generic_setup(drm_dev, 32);
+
+	return 0;
+
+err_kms_cleanup:
+	kirin_drm_kms_cleanup(drm_dev);
+err_drm_dev_put:
+	drm_dev_put(drm_dev);
+
+	return ret;
+}
+
+static void kirin_drm_unbind(struct device *dev)
+{
+	struct drm_device *drm_dev = dev_get_drvdata(dev);
+
+	drm_dev_unregister(drm_dev);
+	kirin_drm_kms_cleanup(drm_dev);
+	drm_dev_put(drm_dev);
+}
+
+static const struct component_master_ops kirin_drm_ops = {
+	.bind = kirin_drm_bind,
+	.unbind = kirin_drm_unbind,
+};
+
+static int kirin_drm_platform_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct component_match *match = NULL;
+	struct device_node *remote;
+
+	remote = of_graph_get_remote_node(np, 0, 0);
+	if (!remote)
+		return -ENODEV;
+
+	drm_of_component_match_add(dev, &match, component_compare_of, remote);
+	of_node_put(remote);
+
+	return component_master_add_with_match(dev, &kirin_drm_ops, match);
+}
+
+static int kirin_drm_platform_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &kirin_drm_ops);
+	return 0;
+}
+
+static const struct of_device_id kirin_drm_dt_ids[] = {
+	{ .compatible = "hisilicon,hi6220-ade",
+	  .data = &ade_driver_data,
+	},
+	{ /* end node */ },
+};
+MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
+
+static struct platform_driver kirin_drm_platform_driver = {
+	.probe = kirin_drm_platform_probe,
+	.remove = kirin_drm_platform_remove,
+	.driver = {
+		.name = "kirin-drm",
+		.of_match_table = kirin_drm_dt_ids,
+	},
+};
+
+drm_module_platform_driver(kirin_drm_platform_driver);
+
+MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
+MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
+MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
+MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
+MODULE_LICENSE("GPL v2");