drivers/gpu/drm/sti/sti_drv.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) STMicroelectronics SA 2014
  * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
  */

 #include <linux/component.h>
 #include <linux/debugfs.h>
 #include <linux/dma-mapping.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>

 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_debugfs.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fbdev_dma.h>
 #include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_of.h>
 #include <drm/drm_probe_helper.h>

 #include "sti_drv.h"
 #include "sti_plane.h"

 #define DRIVER_NAME	"sti"
 #define DRIVER_DESC	"STMicroelectronics SoC DRM"
 #define DRIVER_DATE	"20140601"
 #define DRIVER_MAJOR	1
 #define DRIVER_MINOR	0

 #define STI_MAX_FB_HEIGHT	4096
 #define STI_MAX_FB_WIDTH	4096

 static int sti_drm_fps_get(void *data, u64 *val)
 {
 	struct drm_device *drm_dev = data;
 	struct drm_plane *p;
 	unsigned int i = 0;

 	*val = 0;
 	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 		struct sti_plane *plane = to_sti_plane(p);

 		*val |= plane->fps_info.output << i;
 		i++;
 	}

 	return 0;
 }

 static int sti_drm_fps_set(void *data, u64 val)
 {
 	struct drm_device *drm_dev = data;
 	struct drm_plane *p;
 	unsigned int i = 0;

 	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
 		struct sti_plane *plane = to_sti_plane(p);

 		memset(&plane->fps_info, 0, sizeof(plane->fps_info));
 		plane->fps_info.output = (val >> i) & 1;

 		i++;
 	}

 	return 0;
 }

 DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
 			sti_drm_fps_get, sti_drm_fps_set, "%llu\n");

 static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)
 {
 	struct drm_info_node *node = s->private;
 	struct drm_device *dev = node->minor->dev;
 	struct drm_plane *p;

 	list_for_each_entry(p, &dev->mode_config.plane_list, head) {
 		struct sti_plane *plane = to_sti_plane(p);

 		seq_printf(s, "%s%s\n",
 			   plane->fps_info.fps_str,
 			   plane->fps_info.fips_str);
 	}

 	return 0;
 }

 static struct drm_info_list sti_drm_dbg_list[] = {
 	{"fps_get", sti_drm_fps_dbg_show, 0},
 };

 static void sti_drm_dbg_init(struct drm_minor *minor)
 {
 	drm_debugfs_create_files(sti_drm_dbg_list,
 				 ARRAY_SIZE(sti_drm_dbg_list),
 				 minor->debugfs_root, minor);

 	debugfs_create_file("fps_show", S_IRUGO | S_IWUSR, minor->debugfs_root,
 			    minor->dev, &sti_drm_fps_fops);

 	DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
 }

 static const struct drm_mode_config_funcs sti_mode_config_funcs = {
 	.fb_create = drm_gem_fb_create,
 	.atomic_check = drm_atomic_helper_check,
 	.atomic_commit = drm_atomic_helper_commit,
 };

 static void sti_mode_config_init(struct drm_device *dev)
 {
 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;

 	/*
 	 * set max width and height as default value.
 	 * this value would be used to check framebuffer size limitation
 	 * at drm_mode_addfb().
 	 */
 	dev->mode_config.max_width = STI_MAX_FB_WIDTH;
 	dev->mode_config.max_height = STI_MAX_FB_HEIGHT;

 	dev->mode_config.funcs = &sti_mode_config_funcs;

 	dev->mode_config.normalize_zpos = true;
 }

 DEFINE_DRM_GEM_DMA_FOPS(sti_driver_fops);

 static const struct drm_driver sti_driver = {
 	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
 	.fops = &sti_driver_fops,
 	DRM_GEM_DMA_DRIVER_OPS,

 	.debugfs_init = sti_drm_dbg_init,

 	.name = DRIVER_NAME,
 	.desc = DRIVER_DESC,
 	.date = DRIVER_DATE,
 	.major = DRIVER_MAJOR,
 	.minor = DRIVER_MINOR,
 };

 static int sti_init(struct drm_device *ddev)
 {
 	struct sti_private *private;

 	private = kzalloc(sizeof(*private), GFP_KERNEL);
 	if (!private)
 		return -ENOMEM;

 	ddev->dev_private = (void *)private;
 	dev_set_drvdata(ddev->dev, ddev);
 	private->drm_dev = ddev;

 	drm_mode_config_init(ddev);

 	sti_mode_config_init(ddev);

 	drm_kms_helper_poll_init(ddev);

 	return 0;
 }

 static void sti_cleanup(struct drm_device *ddev)
 {
 	struct sti_private *private = ddev->dev_private;

 	drm_kms_helper_poll_fini(ddev);
 	drm_atomic_helper_shutdown(ddev);
 	drm_mode_config_cleanup(ddev);
 	component_unbind_all(ddev->dev, ddev);
 	dev_set_drvdata(ddev->dev, NULL);
 	kfree(private);
 	ddev->dev_private = NULL;
 }

 static int sti_bind(struct device *dev)
 {
 	struct drm_device *ddev;
 	int ret;

 	ddev = drm_dev_alloc(&sti_driver, dev);
 	if (IS_ERR(ddev))
 		return PTR_ERR(ddev);

 	ret = sti_init(ddev);
 	if (ret)
 		goto err_drm_dev_put;

 	ret = component_bind_all(ddev->dev, ddev);
 	if (ret)
 		goto err_cleanup;

 	ret = drm_dev_register(ddev, 0);
 	if (ret)
 		goto err_cleanup;

 	drm_mode_config_reset(ddev);

 	drm_fbdev_dma_setup(ddev, 32);

 	return 0;

 err_cleanup:
 	sti_cleanup(ddev);
 err_drm_dev_put:
 	drm_dev_put(ddev);
 	return ret;
 }

 static void sti_unbind(struct device *dev)
 {
 	struct drm_device *ddev = dev_get_drvdata(dev);

 	drm_dev_unregister(ddev);
 	sti_cleanup(ddev);
 	drm_dev_put(ddev);
 }

 static const struct component_master_ops sti_ops = {
 	.bind = sti_bind,
 	.unbind = sti_unbind,
 };

 static int sti_platform_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *node = dev->of_node;
 	struct device_node *child_np;
 	struct component_match *match = NULL;

 	dma_set_coherent_mask(dev, DMA_BIT_MASK(32));

 	devm_of_platform_populate(dev);

 	child_np = of_get_next_available_child(node, NULL);

 	while (child_np) {
 		drm_of_component_match_add(dev, &match, component_compare_of,
 					   child_np);
 		child_np = of_get_next_available_child(node, child_np);
 	}

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

 static void sti_platform_remove(struct platform_device *pdev)
 {
 	component_master_del(&pdev->dev, &sti_ops);
 }

 static void sti_platform_shutdown(struct platform_device *pdev)
 {
 	drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
 }

 static const struct of_device_id sti_dt_ids[] = {
 	{ .compatible = "st,sti-display-subsystem", },
 	{ /* end node */ },
 };
 MODULE_DEVICE_TABLE(of, sti_dt_ids);

 static struct platform_driver sti_platform_driver = {
 	.probe = sti_platform_probe,
 	.remove_new = sti_platform_remove,
 	.shutdown = sti_platform_shutdown,
 	.driver = {
 		.name = DRIVER_NAME,
 		.of_match_table = sti_dt_ids,
 	},
 };

 static struct platform_driver * const drivers[] = {
 	&sti_tvout_driver,
 	&sti_hqvdp_driver,
 	&sti_hdmi_driver,
 	&sti_hda_driver,
 	&sti_dvo_driver,
 	&sti_vtg_driver,
 	&sti_compositor_driver,
 	&sti_platform_driver,
 };

 static int sti_drm_init(void)
 {
 	if (drm_firmware_drivers_only())
 		return -ENODEV;

 	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
 }
 module_init(sti_drm_init);

 static void sti_drm_exit(void)
 {
 	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
 }
 module_exit(sti_drm_exit);

 MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
 MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright (C) STMicroelectronics SA 2014
	* Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
	*/

	#include <linux/component.h>
	#include <linux/debugfs.h>
	#include <linux/dma-mapping.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/of_platform.h>
	#include <linux/platform_device.h>

	#include <drm/drm_atomic.h>
	#include <drm/drm_atomic_helper.h>
	#include <drm/drm_debugfs.h>
	#include <drm/drm_drv.h>
	#include <drm/drm_fbdev_dma.h>
	#include <drm/drm_gem_dma_helper.h>
	#include <drm/drm_gem_framebuffer_helper.h>
	#include <drm/drm_of.h>
	#include <drm/drm_probe_helper.h>

	#include "sti_drv.h"
	#include "sti_plane.h"

	#define DRIVER_NAME "sti"
	#define DRIVER_DESC "STMicroelectronics SoC DRM"
	#define DRIVER_DATE "20140601"
	#define DRIVER_MAJOR 1
	#define DRIVER_MINOR 0

	#define STI_MAX_FB_HEIGHT 4096
	#define STI_MAX_FB_WIDTH 4096

	static int sti_drm_fps_get(void data, u64 val)
	{
	struct drm_device *drm_dev = data;
	struct drm_plane *p;
	unsigned int i = 0;

	*val = 0;
	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
	struct sti_plane *plane = to_sti_plane(p);

	*val \|= plane->fps_info.output << i;
	i++;
	}

	return 0;
	}

	static int sti_drm_fps_set(void *data, u64 val)
	{
	struct drm_device *drm_dev = data;
	struct drm_plane *p;
	unsigned int i = 0;

	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
	struct sti_plane *plane = to_sti_plane(p);

	memset(&plane->fps_info, 0, sizeof(plane->fps_info));
	plane->fps_info.output = (val >> i) & 1;

	i++;
	}

	return 0;
	}

	DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
	sti_drm_fps_get, sti_drm_fps_set, "%llu\n");

	static int sti_drm_fps_dbg_show(struct seq_file s, void data)
	{
	struct drm_info_node *node = s->private;
	struct drm_device *dev = node->minor->dev;
	struct drm_plane *p;

	list_for_each_entry(p, &dev->mode_config.plane_list, head) {
	struct sti_plane *plane = to_sti_plane(p);

	seq_printf(s, "%s%s\n",
	plane->fps_info.fps_str,
	plane->fps_info.fips_str);
	}

	return 0;
	}

	static struct drm_info_list sti_drm_dbg_list[] = {
	{"fps_get", sti_drm_fps_dbg_show, 0},
	};

	static void sti_drm_dbg_init(struct drm_minor *minor)
	{
	drm_debugfs_create_files(sti_drm_dbg_list,
	ARRAY_SIZE(sti_drm_dbg_list),
	minor->debugfs_root, minor);

	debugfs_create_file("fps_show", S_IRUGO \| S_IWUSR, minor->debugfs_root,
	minor->dev, &sti_drm_fps_fops);

	DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
	}

	static const struct drm_mode_config_funcs sti_mode_config_funcs = {
	.fb_create = drm_gem_fb_create,
	.atomic_check = drm_atomic_helper_check,
	.atomic_commit = drm_atomic_helper_commit,
	};

	static void sti_mode_config_init(struct drm_device *dev)
	{
	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;

	/*
	* set max width and height as default value.
	* this value would be used to check framebuffer size limitation
	* at drm_mode_addfb().
	*/
	dev->mode_config.max_width = STI_MAX_FB_WIDTH;
	dev->mode_config.max_height = STI_MAX_FB_HEIGHT;

	dev->mode_config.funcs = &sti_mode_config_funcs;

	dev->mode_config.normalize_zpos = true;
	}

	DEFINE_DRM_GEM_DMA_FOPS(sti_driver_fops);

	static const struct drm_driver sti_driver = {
	.driver_features = DRIVER_MODESET \| DRIVER_GEM \| DRIVER_ATOMIC,
	.fops = &sti_driver_fops,
	DRM_GEM_DMA_DRIVER_OPS,

	.debugfs_init = sti_drm_dbg_init,

	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	};

	static int sti_init(struct drm_device *ddev)
	{
	struct sti_private *private;

	private = kzalloc(sizeof(*private), GFP_KERNEL);
	if (!private)
	return -ENOMEM;

	ddev->dev_private = (void *)private;
	dev_set_drvdata(ddev->dev, ddev);
	private->drm_dev = ddev;

	drm_mode_config_init(ddev);

	sti_mode_config_init(ddev);

	drm_kms_helper_poll_init(ddev);

	return 0;
	}

	static void sti_cleanup(struct drm_device *ddev)
	{
	struct sti_private *private = ddev->dev_private;

	drm_kms_helper_poll_fini(ddev);
	drm_atomic_helper_shutdown(ddev);
	drm_mode_config_cleanup(ddev);
	component_unbind_all(ddev->dev, ddev);
	dev_set_drvdata(ddev->dev, NULL);
	kfree(private);
	ddev->dev_private = NULL;
	}

	static int sti_bind(struct device *dev)
	{
	struct drm_device *ddev;
	int ret;

	ddev = drm_dev_alloc(&sti_driver, dev);
	if (IS_ERR(ddev))
	return PTR_ERR(ddev);

	ret = sti_init(ddev);
	if (ret)
	goto err_drm_dev_put;

	ret = component_bind_all(ddev->dev, ddev);
	if (ret)
	goto err_cleanup;

	ret = drm_dev_register(ddev, 0);
	if (ret)
	goto err_cleanup;

	drm_mode_config_reset(ddev);

	drm_fbdev_dma_setup(ddev, 32);

	return 0;

	err_cleanup:
	sti_cleanup(ddev);
	err_drm_dev_put:
	drm_dev_put(ddev);
	return ret;
	}

	static void sti_unbind(struct device *dev)
	{
	struct drm_device *ddev = dev_get_drvdata(dev);

	drm_dev_unregister(ddev);
	sti_cleanup(ddev);
	drm_dev_put(ddev);
	}

	static const struct component_master_ops sti_ops = {
	.bind = sti_bind,
	.unbind = sti_unbind,
	};

	static int sti_platform_probe(struct platform_device *pdev)
	{
	struct device *dev = &pdev->dev;
	struct device_node *node = dev->of_node;
	struct device_node *child_np;
	struct component_match *match = NULL;

	dma_set_coherent_mask(dev, DMA_BIT_MASK(32));

	devm_of_platform_populate(dev);

	child_np = of_get_next_available_child(node, NULL);

	while (child_np) {
	drm_of_component_match_add(dev, &match, component_compare_of,
	child_np);
	child_np = of_get_next_available_child(node, child_np);
	}

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

	static void sti_platform_remove(struct platform_device *pdev)
	{
	component_master_del(&pdev->dev, &sti_ops);
	}

	static void sti_platform_shutdown(struct platform_device *pdev)
	{
	drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
	}

	static const struct of_device_id sti_dt_ids[] = {
	{ .compatible = "st,sti-display-subsystem", },
	{ /* end node */ },
	};
	MODULE_DEVICE_TABLE(of, sti_dt_ids);

	static struct platform_driver sti_platform_driver = {
	.probe = sti_platform_probe,
	.remove_new = sti_platform_remove,
	.shutdown = sti_platform_shutdown,
	.driver = {
	.name = DRIVER_NAME,
	.of_match_table = sti_dt_ids,
	},
	};

	static struct platform_driver * const drivers[] = {
	&sti_tvout_driver,
	&sti_hqvdp_driver,
	&sti_hdmi_driver,
	&sti_hda_driver,
	&sti_dvo_driver,
	&sti_vtg_driver,
	&sti_compositor_driver,
	&sti_platform_driver,
	};

	static int sti_drm_init(void)
	{
	if (drm_firmware_drivers_only())
	return -ENODEV;

	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
	}
	module_init(sti_drm_init);

	static void sti_drm_exit(void)
	{
	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
	}
	module_exit(sti_drm_exit);

	MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
	MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
	MODULE_LICENSE("GPL");