Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 542 insertions, 0 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
new file mode 100644
index 0000000000..ab55d71325
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -0,0 +1,542 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:Mark Yao <mark.yao@rock-chips.com>
+ *
+ * based on exynos_drm_drv.c
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+#include <linux/component.h>
+#include <linux/console.h>
+#include <linux/iommu.h>
+
+#include <drm/drm_aperture.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_generic.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#if defined(CONFIG_ARM_DMA_USE_IOMMU)
+#include <asm/dma-iommu.h>
+#else
+#define arm_iommu_detach_device(...)	({ })
+#define arm_iommu_release_mapping(...)	({ })
+#define to_dma_iommu_mapping(dev) NULL
+#endif
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_fb.h"
+#include "rockchip_drm_gem.h"
+
+#define DRIVER_NAME	"rockchip"
+#define DRIVER_DESC	"RockChip Soc DRM"
+#define DRIVER_DATE	"20140818"
+#define DRIVER_MAJOR	1
+#define DRIVER_MINOR	0
+
+static const struct drm_driver rockchip_drm_driver;
+
+/*
+ * Attach a (component) device to the shared drm dma mapping from master drm
+ * device.  This is used by the VOPs to map GEM buffers to a common DMA
+ * mapping.
+ */
+int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
+				   struct device *dev)
+{
+	struct rockchip_drm_private *private = drm_dev->dev_private;
+	int ret;
+
+	if (!private->domain)
+		return 0;
+
+	if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)) {
+		struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
+
+		if (mapping) {
+			arm_iommu_detach_device(dev);
+			arm_iommu_release_mapping(mapping);
+		}
+	}
+
+	ret = iommu_attach_device(private->domain, dev);
+	if (ret) {
+		DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
+				    struct device *dev)
+{
+	struct rockchip_drm_private *private = drm_dev->dev_private;
+
+	if (!private->domain)
+		return;
+
+	iommu_detach_device(private->domain, dev);
+}
+
+void rockchip_drm_dma_init_device(struct drm_device *drm_dev,
+				  struct device *dev)
+{
+	struct rockchip_drm_private *private = drm_dev->dev_private;
+
+	if (!device_iommu_mapped(dev))
+		private->iommu_dev = ERR_PTR(-ENODEV);
+	else if (!private->iommu_dev)
+		private->iommu_dev = dev;
+}
+
+static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
+{
+	struct rockchip_drm_private *private = drm_dev->dev_private;
+	struct iommu_domain_geometry *geometry;
+	u64 start, end;
+
+	if (IS_ERR_OR_NULL(private->iommu_dev))
+		return 0;
+
+	private->domain = iommu_domain_alloc(private->iommu_dev->bus);
+	if (!private->domain)
+		return -ENOMEM;
+
+	geometry = &private->domain->geometry;
+	start = geometry->aperture_start;
+	end = geometry->aperture_end;
+
+	DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
+		  start, end);
+	drm_mm_init(&private->mm, start, end - start + 1);
+	mutex_init(&private->mm_lock);
+
+	return 0;
+}
+
+static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
+{
+	struct rockchip_drm_private *private = drm_dev->dev_private;
+
+	if (!private->domain)
+		return;
+
+	drm_mm_takedown(&private->mm);
+	iommu_domain_free(private->domain);
+}
+
+static int rockchip_drm_bind(struct device *dev)
+{
+	struct drm_device *drm_dev;
+	struct rockchip_drm_private *private;
+	int ret;
+
+	/* Remove existing drivers that may own the framebuffer memory. */
+	ret = drm_aperture_remove_framebuffers(&rockchip_drm_driver);
+	if (ret) {
+		DRM_DEV_ERROR(dev,
+			      "Failed to remove existing framebuffers - %d.\n",
+			      ret);
+		return ret;
+	}
+
+	drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
+	if (IS_ERR(drm_dev))
+		return PTR_ERR(drm_dev);
+
+	dev_set_drvdata(dev, drm_dev);
+
+	private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
+	if (!private) {
+		ret = -ENOMEM;
+		goto err_free;
+	}
+
+	drm_dev->dev_private = private;
+
+	ret = drmm_mode_config_init(drm_dev);
+	if (ret)
+		goto err_free;
+
+	rockchip_drm_mode_config_init(drm_dev);
+
+	/* Try to bind all sub drivers. */
+	ret = component_bind_all(dev, drm_dev);
+	if (ret)
+		goto err_free;
+
+	ret = rockchip_drm_init_iommu(drm_dev);
+	if (ret)
+		goto err_unbind_all;
+
+	ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
+	if (ret)
+		goto err_iommu_cleanup;
+
+	drm_mode_config_reset(drm_dev);
+
+	/* init kms poll for handling hpd */
+	drm_kms_helper_poll_init(drm_dev);
+
+	ret = drm_dev_register(drm_dev, 0);
+	if (ret)
+		goto err_kms_helper_poll_fini;
+
+	drm_fbdev_generic_setup(drm_dev, 0);
+
+	return 0;
+err_kms_helper_poll_fini:
+	drm_kms_helper_poll_fini(drm_dev);
+err_iommu_cleanup:
+	rockchip_iommu_cleanup(drm_dev);
+err_unbind_all:
+	component_unbind_all(dev, drm_dev);
+err_free:
+	drm_dev_put(drm_dev);
+	return ret;
+}
+
+static void rockchip_drm_unbind(struct device *dev)
+{
+	struct drm_device *drm_dev = dev_get_drvdata(dev);
+
+	drm_dev_unregister(drm_dev);
+
+	drm_kms_helper_poll_fini(drm_dev);
+
+	drm_atomic_helper_shutdown(drm_dev);
+	component_unbind_all(dev, drm_dev);
+	rockchip_iommu_cleanup(drm_dev);
+
+	drm_dev_put(drm_dev);
+}
+
+DEFINE_DRM_GEM_FOPS(rockchip_drm_driver_fops);
+
+static const struct drm_driver rockchip_drm_driver = {
+	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
+	.dumb_create		= rockchip_gem_dumb_create,
+	.gem_prime_import_sg_table	= rockchip_gem_prime_import_sg_table,
+	.fops			= &rockchip_drm_driver_fops,
+	.name	= DRIVER_NAME,
+	.desc	= DRIVER_DESC,
+	.date	= DRIVER_DATE,
+	.major	= DRIVER_MAJOR,
+	.minor	= DRIVER_MINOR,
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int rockchip_drm_sys_suspend(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
+
+	return drm_mode_config_helper_suspend(drm);
+}
+
+static int rockchip_drm_sys_resume(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
+
+	return drm_mode_config_helper_resume(drm);
+}
+#endif
+
+static const struct dev_pm_ops rockchip_drm_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
+				rockchip_drm_sys_resume)
+};
+
+#define MAX_ROCKCHIP_SUB_DRIVERS 16
+static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
+static int num_rockchip_sub_drivers;
+
+/*
+ * Get the endpoint id of the remote endpoint of the given encoder. This
+ * information is used by the VOP2 driver to identify the encoder.
+ *
+ * @rkencoder: The encoder to get the remote endpoint id from
+ * @np: The encoder device node
+ * @port: The number of the port leading to the VOP2
+ * @reg: The endpoint number leading to the VOP2
+ */
+int rockchip_drm_encoder_set_crtc_endpoint_id(struct rockchip_encoder *rkencoder,
+					      struct device_node *np, int port, int reg)
+{
+	struct of_endpoint ep;
+	struct device_node *en, *ren;
+	int ret;
+
+	en = of_graph_get_endpoint_by_regs(np, port, reg);
+	if (!en)
+		return -ENOENT;
+
+	ren = of_graph_get_remote_endpoint(en);
+	if (!ren)
+		return -ENOENT;
+
+	ret = of_graph_parse_endpoint(ren, &ep);
+	if (ret)
+		return ret;
+
+	rkencoder->crtc_endpoint_id = ep.id;
+
+	return 0;
+}
+
+/*
+ * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
+ * Should be called from the component bind stage of the drivers
+ * to ensure that all subdrivers are probed.
+ *
+ * @ep: endpoint of a rockchip vop
+ *
+ * returns true if subdriver, false if external bridge and -ENODEV
+ * if remote port does not contain a device.
+ */
+int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
+{
+	struct device_node *node = of_graph_get_remote_port_parent(ep);
+	struct platform_device *pdev;
+	struct device_driver *drv;
+	int i;
+
+	if (!node)
+		return -ENODEV;
+
+	/* status disabled will prevent creation of platform-devices */
+	if (!of_device_is_available(node)) {
+		of_node_put(node);
+		return -ENODEV;
+	}
+
+	pdev = of_find_device_by_node(node);
+	of_node_put(node);
+
+	/* enabled non-platform-devices can immediately return here */
+	if (!pdev)
+		return false;
+
+	/*
+	 * All rockchip subdrivers have probed at this point, so
+	 * any device not having a driver now is an external bridge.
+	 */
+	drv = pdev->dev.driver;
+	if (!drv) {
+		platform_device_put(pdev);
+		return false;
+	}
+
+	for (i = 0; i < num_rockchip_sub_drivers; i++) {
+		if (rockchip_sub_drivers[i] == to_platform_driver(drv)) {
+			platform_device_put(pdev);
+			return true;
+		}
+	}
+
+	platform_device_put(pdev);
+	return false;
+}
+
+static void rockchip_drm_match_remove(struct device *dev)
+{
+	struct device_link *link;
+
+	list_for_each_entry(link, &dev->links.consumers, s_node)
+		device_link_del(link);
+}
+
+static struct component_match *rockchip_drm_match_add(struct device *dev)
+{
+	struct component_match *match = NULL;
+	int i;
+
+	for (i = 0; i < num_rockchip_sub_drivers; i++) {
+		struct platform_driver *drv = rockchip_sub_drivers[i];
+		struct device *p = NULL, *d;
+
+		do {
+			d = platform_find_device_by_driver(p, &drv->driver);
+			put_device(p);
+			p = d;
+
+			if (!d)
+				break;
+
+			device_link_add(dev, d, DL_FLAG_STATELESS);
+			component_match_add(dev, &match, component_compare_dev, d);
+		} while (true);
+	}
+
+	if (IS_ERR(match))
+		rockchip_drm_match_remove(dev);
+
+	return match ?: ERR_PTR(-ENODEV);
+}
+
+static const struct component_master_ops rockchip_drm_ops = {
+	.bind = rockchip_drm_bind,
+	.unbind = rockchip_drm_unbind,
+};
+
+static int rockchip_drm_platform_of_probe(struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+	struct device_node *port;
+	bool found = false;
+	int i;
+
+	if (!np)
+		return -ENODEV;
+
+	for (i = 0;; i++) {
+		port = of_parse_phandle(np, "ports", i);
+		if (!port)
+			break;
+
+		if (!of_device_is_available(port->parent)) {
+			of_node_put(port);
+			continue;
+		}
+
+		found = true;
+		of_node_put(port);
+	}
+
+	if (i == 0) {
+		DRM_DEV_ERROR(dev, "missing 'ports' property\n");
+		return -ENODEV;
+	}
+
+	if (!found) {
+		DRM_DEV_ERROR(dev,
+			      "No available vop found for display-subsystem.\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int rockchip_drm_platform_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct component_match *match = NULL;
+	int ret;
+
+	ret = rockchip_drm_platform_of_probe(dev);
+	if (ret)
+		return ret;
+
+	match = rockchip_drm_match_add(dev);
+	if (IS_ERR(match))
+		return PTR_ERR(match);
+
+	ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
+	if (ret < 0) {
+		rockchip_drm_match_remove(dev);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void rockchip_drm_platform_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &rockchip_drm_ops);
+
+	rockchip_drm_match_remove(&pdev->dev);
+}
+
+static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
+{
+	struct drm_device *drm = platform_get_drvdata(pdev);
+
+	if (drm)
+		drm_atomic_helper_shutdown(drm);
+}
+
+static const struct of_device_id rockchip_drm_dt_ids[] = {
+	{ .compatible = "rockchip,display-subsystem", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
+
+static struct platform_driver rockchip_drm_platform_driver = {
+	.probe = rockchip_drm_platform_probe,
+	.remove_new = rockchip_drm_platform_remove,
+	.shutdown = rockchip_drm_platform_shutdown,
+	.driver = {
+		.name = "rockchip-drm",
+		.of_match_table = rockchip_drm_dt_ids,
+		.pm = &rockchip_drm_pm_ops,
+	},
+};
+
+#define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
+	if (IS_ENABLED(cond) && \
+	    !WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
+		rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
+}
+
+static int __init rockchip_drm_init(void)
+{
+	int ret;
+
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
+	num_rockchip_sub_drivers = 0;
+	ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_ROCKCHIP_VOP);
+	ADD_ROCKCHIP_SUB_DRIVER(vop2_platform_driver, CONFIG_ROCKCHIP_VOP2);
+	ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
+				CONFIG_ROCKCHIP_LVDS);
+	ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
+				CONFIG_ROCKCHIP_ANALOGIX_DP);
+	ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
+	ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
+				CONFIG_ROCKCHIP_DW_HDMI);
+	ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
+				CONFIG_ROCKCHIP_DW_MIPI_DSI);
+	ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
+	ADD_ROCKCHIP_SUB_DRIVER(rk3066_hdmi_driver,
+				CONFIG_ROCKCHIP_RK3066_HDMI);
+
+	ret = platform_register_drivers(rockchip_sub_drivers,
+					num_rockchip_sub_drivers);
+	if (ret)
+		return ret;
+
+	ret = platform_driver_register(&rockchip_drm_platform_driver);
+	if (ret)
+		goto err_unreg_drivers;
+
+	return 0;
+
+err_unreg_drivers:
+	platform_unregister_drivers(rockchip_sub_drivers,
+				    num_rockchip_sub_drivers);
+	return ret;
+}
+
+static void __exit rockchip_drm_fini(void)
+{
+	platform_driver_unregister(&rockchip_drm_platform_driver);
+
+	platform_unregister_drivers(rockchip_sub_drivers,
+				    num_rockchip_sub_drivers);
+}
+
+module_init(rockchip_drm_init);
+module_exit(rockchip_drm_fini);
+
+MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
+MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
+MODULE_LICENSE("GPL v2");