drm: rockchip: Add basic drm driver (2048e328) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/gpu/drm/Kconfig

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		@@ -167,6 +167,8 @@ config DRM_SAVAGE

		source "drivers/gpu/drm/exynos/Kconfig"

		source "drivers/gpu/drm/rockchip/Kconfig"

		source "drivers/gpu/drm/vmwgfx/Kconfig"

		source "drivers/gpu/drm/gma500/Kconfig"

drivers/gpu/drm/Makefile

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Original line number	Diff line number	Diff line
		@@ -49,6 +49,7 @@ obj-$(CONFIG_DRM_VMWGFX)+= vmwgfx/
		obj-$(CONFIG_DRM_VIA) +=via/
		obj-$(CONFIG_DRM_NOUVEAU) +=nouveau/
		obj-$(CONFIG_DRM_EXYNOS) +=exynos/
		obj-$(CONFIG_DRM_ROCKCHIP) +=rockchip/
		obj-$(CONFIG_DRM_GMA500) += gma500/
		obj-$(CONFIG_DRM_UDL) += udl/
		obj-$(CONFIG_DRM_AST) += ast/

drivers/gpu/drm/rockchip/Kconfig

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		config DRM_ROCKCHIP
		tristate "DRM Support for Rockchip"
		depends on DRM && ROCKCHIP_IOMMU
		select DRM_KMS_HELPER
		select DRM_KMS_FB_HELPER
		select DRM_PANEL
		select FB_CFB_FILLRECT
		select FB_CFB_COPYAREA
		select FB_CFB_IMAGEBLIT
		select VT_HW_CONSOLE_BINDING if FRAMEBUFFER_CONSOLE
		select VIDEOMODE_HELPERS
		help
		Choose this option if you have a Rockchip soc chipset.
		This driver provides kernel mode setting and buffer
		management to userspace. This driver does not provide
		2D or 3D acceleration; acceleration is performed by other
		IP found on the SoC.

drivers/gpu/drm/rockchip/Makefile

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Original line number	Diff line number	Diff line
		#
		# Makefile for the drm device driver. This driver provides support for the
		# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.

		rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o rockchip_drm_fbdev.o \
		rockchip_drm_gem.o

		obj-$(CONFIG_DRM_ROCKCHIP) += rockchipdrm.o rockchip_drm_vop.o

drivers/gpu/drm/rockchip/rockchip_drm_drv.c

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+551 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
		* Author:Mark Yao <mark.yao@rock-chips.com>
		*
		* based on exynos_drm_drv.c
		*
		* This software is licensed under the terms of the GNU General Public
		* License version 2, as published by the Free Software Foundation, and
		* may be copied, distributed, and modified under those terms.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/

		#include <asm/dma-iommu.h>

		#include <drm/drmP.h>
		#include <drm/drm_crtc_helper.h>
		#include <drm/drm_fb_helper.h>
		#include <linux/dma-mapping.h>
		#include <linux/pm_runtime.h>
		#include <linux/of_graph.h>
		#include <linux/component.h>

		#include "rockchip_drm_drv.h"
		#include "rockchip_drm_fb.h"
		#include "rockchip_drm_fbdev.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

		/*
		* 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 dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
		int ret;

		ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
		if (ret)
		return ret;

		dma_set_max_seg_size(dev, DMA_BIT_MASK(32));

		return arm_iommu_attach_device(dev, mapping);
		}
		EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device);

		void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
		struct device *dev)
		{
		arm_iommu_detach_device(dev);
		}
		EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device);

		int rockchip_register_crtc_funcs(struct drm_device *dev,
		const struct rockchip_crtc_funcs *crtc_funcs,
		int pipe)
		{
		struct rockchip_drm_private *priv = dev->dev_private;

		if (pipe > ROCKCHIP_MAX_CRTC)
		return -EINVAL;

		priv->crtc_funcs[pipe] = crtc_funcs;

		return 0;
		}
		EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs);

		void rockchip_unregister_crtc_funcs(struct drm_device *dev, int pipe)
		{
		struct rockchip_drm_private *priv = dev->dev_private;

		if (pipe > ROCKCHIP_MAX_CRTC)
		return;

		priv->crtc_funcs[pipe] = NULL;
		}
		EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs);

		static struct drm_crtc rockchip_crtc_from_pipe(struct drm_device drm,
		int pipe)
		{
		struct drm_crtc *crtc;
		int i = 0;

		list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
		if (i++ == pipe)
		return crtc;

		return NULL;
		}

		static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
		{
		struct rockchip_drm_private *priv = dev->dev_private;
		struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);

		if (crtc && priv->crtc_funcs[pipe] &&
		priv->crtc_funcs[pipe]->enable_vblank)
		return priv->crtc_funcs[pipe]->enable_vblank(crtc);

		return 0;
		}

		static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
		{
		struct rockchip_drm_private *priv = dev->dev_private;
		struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);

		if (crtc && priv->crtc_funcs[pipe] &&
		priv->crtc_funcs[pipe]->enable_vblank)
		priv->crtc_funcs[pipe]->disable_vblank(crtc);
		}

		static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
		{
		struct rockchip_drm_private *private;
		struct dma_iommu_mapping *mapping;
		struct device *dev = drm_dev->dev;
		int ret;

		private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
		if (!private)
		return -ENOMEM;

		drm_dev->dev_private = private;

		drm_mode_config_init(drm_dev);

		rockchip_drm_mode_config_init(drm_dev);

		dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
		GFP_KERNEL);
		if (!dev->dma_parms) {
		ret = -ENOMEM;
		goto err_config_cleanup;
		}

		/* TODO(djkurtz): fetch the mapping start/size from somewhere */
		mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
		SZ_2G);
		if (IS_ERR(mapping)) {
		ret = PTR_ERR(mapping);
		goto err_config_cleanup;
		}

		ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
		if (ret)
		goto err_release_mapping;

		dma_set_max_seg_size(dev, DMA_BIT_MASK(32));

		ret = arm_iommu_attach_device(dev, mapping);
		if (ret)
		goto err_release_mapping;

		/* Try to bind all sub drivers. */
		ret = component_bind_all(dev, drm_dev);
		if (ret)
		goto err_detach_device;

		/* init kms poll for handling hpd */
		drm_kms_helper_poll_init(drm_dev);

		/*
		* enable drm irq mode.
		* - with irq_enabled = true, we can use the vblank feature.
		*/
		drm_dev->irq_enabled = true;

		ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
		if (ret)
		goto err_kms_helper_poll_fini;

		/*
		* with vblank_disable_allowed = true, vblank interrupt will be disabled
		* by drm timer once a current process gives up ownership of
		* vblank event.(after drm_vblank_put function is called)
		*/
		drm_dev->vblank_disable_allowed = true;

		ret = rockchip_drm_fbdev_init(drm_dev);
		if (ret)
		goto err_vblank_cleanup;

		return 0;
		err_vblank_cleanup:
		drm_vblank_cleanup(drm_dev);
		err_kms_helper_poll_fini:
		drm_kms_helper_poll_fini(drm_dev);
		component_unbind_all(dev, drm_dev);
		err_detach_device:
		arm_iommu_detach_device(dev);
		err_release_mapping:
		arm_iommu_release_mapping(dev->archdata.mapping);
		err_config_cleanup:
		drm_mode_config_cleanup(drm_dev);
		drm_dev->dev_private = NULL;
		return ret;
		}

		static int rockchip_drm_unload(struct drm_device *drm_dev)
		{
		struct device *dev = drm_dev->dev;

		rockchip_drm_fbdev_fini(drm_dev);
		drm_vblank_cleanup(drm_dev);
		drm_kms_helper_poll_fini(drm_dev);
		component_unbind_all(dev, drm_dev);
		arm_iommu_detach_device(dev);
		arm_iommu_release_mapping(dev->archdata.mapping);
		drm_mode_config_cleanup(drm_dev);
		drm_dev->dev_private = NULL;

		return 0;
		}

		void rockchip_drm_lastclose(struct drm_device *dev)
		{
		struct rockchip_drm_private *priv = dev->dev_private;

		drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
		}

		static const struct file_operations rockchip_drm_driver_fops = {
		.owner = THIS_MODULE,
		.open = drm_open,
		.mmap = rockchip_gem_mmap,
		.poll = drm_poll,
		.read = drm_read,
		.unlocked_ioctl = drm_ioctl,
		#ifdef CONFIG_COMPAT
		.compat_ioctl = drm_compat_ioctl,
		#endif
		.release = drm_release,
		};

		const struct vm_operations_struct rockchip_drm_vm_ops = {
		.open = drm_gem_vm_open,
		.close = drm_gem_vm_close,
		};

		static struct drm_driver rockchip_drm_driver = {
		.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_PRIME,
		.load = rockchip_drm_load,
		.unload = rockchip_drm_unload,
		.lastclose = rockchip_drm_lastclose,
		.get_vblank_counter = drm_vblank_count,
		.enable_vblank = rockchip_drm_crtc_enable_vblank,
		.disable_vblank = rockchip_drm_crtc_disable_vblank,
		.gem_vm_ops = &rockchip_drm_vm_ops,
		.gem_free_object = rockchip_gem_free_object,
		.dumb_create = rockchip_gem_dumb_create,
		.dumb_map_offset = rockchip_gem_dumb_map_offset,
		.dumb_destroy = drm_gem_dumb_destroy,
		.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
		.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
		.gem_prime_import = drm_gem_prime_import,
		.gem_prime_export = drm_gem_prime_export,
		.gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
		.gem_prime_vmap = rockchip_gem_prime_vmap,
		.gem_prime_vunmap = rockchip_gem_prime_vunmap,
		.gem_prime_mmap = rockchip_gem_mmap_buf,
		.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);
		struct drm_connector *connector;

		if (!drm)
		return 0;

		drm_modeset_lock_all(drm);
		list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
		int old_dpms = connector->dpms;

		if (connector->funcs->dpms)
		connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);

		/* Set the old mode back to the connector for resume */
		connector->dpms = old_dpms;
		}
		drm_modeset_unlock_all(drm);

		return 0;
		}

		static int rockchip_drm_sys_resume(struct device *dev)
		{
		struct drm_device *drm = dev_get_drvdata(dev);
		struct drm_connector *connector;
		enum drm_connector_status status;
		bool changed = false;

		if (!drm)
		return 0;

		drm_modeset_lock_all(drm);
		list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
		int desired_mode = connector->dpms;

		/*
		* at suspend time, we save dpms to connector->dpms,
		* restore the old_dpms, and at current time, the connector
		* dpms status must be DRM_MODE_DPMS_OFF.
		*/
		connector->dpms = DRM_MODE_DPMS_OFF;

		/*
		* If the connector has been disconnected during suspend,
		* disconnect it from the encoder and leave it off. We'll notify
		* userspace at the end.
		*/
		if (desired_mode == DRM_MODE_DPMS_ON) {
		status = connector->funcs->detect(connector, true);
		if (status == connector_status_disconnected) {
		connector->encoder = NULL;
		connector->status = status;
		changed = true;
		continue;
		}
		}
		if (connector->funcs->dpms)
		connector->funcs->dpms(connector, desired_mode);
		}
		drm_modeset_unlock_all(drm);

		drm_helper_resume_force_mode(drm);

		if (changed)
		drm_kms_helper_hotplug_event(drm);

		return 0;
		}
		#endif

		static const struct dev_pm_ops rockchip_drm_pm_ops = {
		SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
		rockchip_drm_sys_resume)
		};

		/*
		* @node: device tree node containing encoder input ports
		* @encoder: drm_encoder
		*/
		int rockchip_drm_encoder_get_mux_id(struct device_node *node,
		struct drm_encoder *encoder)
		{
		struct device_node *ep = NULL;
		struct drm_crtc *crtc = encoder->crtc;
		struct of_endpoint endpoint;
		struct device_node *port;
		int ret;

		if (!node \|\| !crtc)
		return -EINVAL;

		do {
		ep = of_graph_get_next_endpoint(node, ep);
		if (!ep)
		break;

		port = of_graph_get_remote_port(ep);
		of_node_put(port);
		if (port == crtc->port) {
		ret = of_graph_parse_endpoint(ep, &endpoint);
		return ret ?: endpoint.id;
		}
		} while (ep);

		return -EINVAL;
		}

		static int compare_of(struct device dev, void data)
		{
		struct device_node *np = data;

		return dev->of_node == np;
		}

		static void rockchip_add_endpoints(struct device *dev,
		struct component_match **match,
		struct device_node *port)
		{
		struct device_node ep, remote;

		for_each_child_of_node(port, ep) {
		remote = of_graph_get_remote_port_parent(ep);
		if (!remote \|\| !of_device_is_available(remote)) {
		of_node_put(remote);
		continue;
		} else if (!of_device_is_available(remote->parent)) {
		dev_warn(dev, "parent device of %s is not available\n",
		remote->full_name);
		of_node_put(remote);
		continue;
		}

		component_match_add(dev, match, compare_of, remote);
		of_node_put(remote);
		}
		}

		static int rockchip_drm_bind(struct device *dev)
		{
		struct drm_device *drm;
		int ret;

		drm = drm_dev_alloc(&rockchip_drm_driver, dev);
		if (!drm)
		return -ENOMEM;

		ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
		if (ret)
		goto err_free;

		ret = drm_dev_register(drm, 0);
		if (ret)
		goto err_free;

		dev_set_drvdata(dev, drm);

		return 0;

		err_free:
		drm_dev_unref(drm);
		return ret;
		}

		static void rockchip_drm_unbind(struct device *dev)
		{
		struct drm_device *drm = dev_get_drvdata(dev);

		drm_dev_unregister(drm);
		drm_dev_unref(drm);
		dev_set_drvdata(dev, NULL);
		}

		static const struct component_master_ops rockchip_drm_ops = {
		.bind = rockchip_drm_bind,
		.unbind = rockchip_drm_unbind,
		};

		static int rockchip_drm_platform_probe(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct component_match *match = NULL;
		struct device_node *np = dev->of_node;
		struct device_node *port;
		int i;

		if (!np)
		return -ENODEV;
		/*
		* Bind the crtc ports first, so that
		* drm_of_find_possible_crtcs called from encoder .bind callbacks
		* works as expected.
		*/
		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;
		}

		component_match_add(dev, &match, compare_of, port->parent);
		of_node_put(port);
		}

		if (i == 0) {
		dev_err(dev, "missing 'ports' property\n");
		return -ENODEV;
		}

		if (!match) {
		dev_err(dev, "No available vop found for display-subsystem.\n");
		return -ENODEV;
		}
		/*
		* For each bound crtc, bind the encoders attached to its
		* remote endpoint.
		*/
		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;
		}

		rockchip_add_endpoints(dev, &match, port);
		of_node_put(port);
		}

		return component_master_add_with_match(dev, &rockchip_drm_ops, match);
		}

		static int rockchip_drm_platform_remove(struct platform_device *pdev)
		{
		component_master_del(&pdev->dev, &rockchip_drm_ops);

		return 0;
		}

		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 = rockchip_drm_platform_remove,
		.driver = {
		.owner = THIS_MODULE,
		.name = "rockchip-drm",
		.of_match_table = rockchip_drm_dt_ids,
		.pm = &rockchip_drm_pm_ops,
		},
		};

		module_platform_driver(rockchip_drm_platform_driver);

		MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
		MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
		MODULE_LICENSE("GPL v2");