cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/armada/armada_drv.c

/*
 * Copyright (C) 2012 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_of.h>
#include "armada_crtc.h"
#include "armada_drm.h"
#include "armada_gem.h"
#include "armada_hw.h"
#include <drm/armada_drm.h>
#include "armada_ioctlP.h"


static void armada_drm_unref_work(struct work_struct *work) { struct armada_private *priv = container_of(work, struct armada_private, fb_unref_work); struct drm_framebuffer *fb; while (kfifo_get(&priv->fb_unref, &fb)) drm_framebuffer_unreference(fb); }

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/* Must be called with dev->event_lock held */
void __armada_drm_queue_unref_work(struct drm_device *dev, struct drm_framebuffer *fb) { struct armada_private *priv = dev->dev_private; WARN_ON(!kfifo_put(&priv->fb_unref, fb)); schedule_work(&priv->fb_unref_work); }

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Russell King46100.00%2100.00%
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void armada_drm_queue_unref_work(struct drm_device *dev, struct drm_framebuffer *fb) { unsigned long flags; spin_lock_irqsave(&dev->event_lock, flags); __armada_drm_queue_unref_work(dev, fb); spin_unlock_irqrestore(&dev->event_lock, flags); }

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/* These are called under the vbl_lock. */
static int armada_drm_enable_vblank(struct drm_device *dev, unsigned int pipe) { struct armada_private *priv = dev->dev_private; armada_drm_crtc_enable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA); return 0; }

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static void armada_drm_disable_vblank(struct drm_device *dev, unsigned int pipe) { struct armada_private *priv = dev->dev_private; armada_drm_crtc_disable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA); }

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Russell King36100.00%2100.00%
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static struct drm_ioctl_desc armada_ioctls[] = { DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0), DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0), DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0), };
static void armada_drm_lastclose(struct drm_device *dev) { armada_fbdev_lastclose(dev); }

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static const struct file_operations armada_drm_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .read = drm_read, .poll = drm_poll, .unlocked_ioctl = drm_ioctl, .mmap = drm_gem_mmap, .open = drm_open, .release = drm_release, }; static struct drm_driver armada_drm_driver = { .lastclose = armada_drm_lastclose, .get_vblank_counter = drm_vblank_no_hw_counter, .enable_vblank = armada_drm_enable_vblank, .disable_vblank = armada_drm_disable_vblank, .gem_free_object_unlocked = armada_gem_free_object, .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_export = armada_gem_prime_export, .gem_prime_import = armada_gem_prime_import, .dumb_create = armada_gem_dumb_create, .dumb_map_offset = armada_gem_dumb_map_offset, .dumb_destroy = armada_gem_dumb_destroy, .gem_vm_ops = &armada_gem_vm_ops, .major = 1, .minor = 0, .name = "armada-drm", .desc = "Armada SoC DRM", .date = "20120730", .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME, .ioctls = armada_ioctls, .fops = &armada_drm_fops, };
static int armada_drm_bind(struct device *dev) { struct armada_private *priv; struct resource *mem = NULL; int ret, n; for (n = 0; ; n++) { struct resource *r = platform_get_resource(to_platform_device(dev), IORESOURCE_MEM, n); if (!r) break; /* Resources above 64K are graphics memory */ if (resource_size(r) > SZ_64K) mem = r; else return -EINVAL; } if (!mem) return -ENXIO; if (!devm_request_mem_region(dev, mem->start, resource_size(mem), "armada-drm")) return -EBUSY; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; /* * The drm_device structure must be at the start of * armada_private for drm_dev_unref() to work correctly. */ BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0); ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev); if (ret) { dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n", __func__, ret); kfree(priv); return ret; } priv->drm.platformdev = to_platform_device(dev); priv->drm.dev_private = priv; platform_set_drvdata(priv->drm.platformdev, &priv->drm); INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work); INIT_KFIFO(priv->fb_unref); /* Mode setting support */ drm_mode_config_init(&priv->drm); priv->drm.mode_config.min_width = 320; priv->drm.mode_config.min_height = 200; /* * With vscale enabled, the maximum width is 1920 due to the * 1920 by 3 lines RAM */ priv->drm.mode_config.max_width = 1920; priv->drm.mode_config.max_height = 2048; priv->drm.mode_config.preferred_depth = 24; priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs; drm_mm_init(&priv->linear, mem->start, resource_size(mem)); mutex_init(&priv->linear_lock); ret = component_bind_all(dev, &priv->drm); if (ret) goto err_kms; ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc); if (ret) goto err_comp; priv->drm.irq_enabled = true; ret = armada_fbdev_init(&priv->drm); if (ret) goto err_comp; drm_kms_helper_poll_init(&priv->drm); ret = drm_dev_register(&priv->drm, 0); if (ret) goto err_poll; #ifdef CONFIG_DEBUG_FS armada_drm_debugfs_init(priv->drm.primary); #endif return 0; err_poll: drm_kms_helper_poll_fini(&priv->drm); armada_fbdev_fini(&priv->drm); err_comp: component_unbind_all(dev, &priv->drm); err_kms: drm_mode_config_cleanup(&priv->drm); drm_mm_takedown(&priv->linear); flush_work(&priv->fb_unref_work); drm_dev_unref(&priv->drm); return ret; }

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Russell King51799.81%480.00%
Daniel Vetter10.19%120.00%
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static void armada_drm_unbind(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); struct armada_private *priv = drm->dev_private; drm_kms_helper_poll_fini(&priv->drm); armada_fbdev_fini(&priv->drm); #ifdef CONFIG_DEBUG_FS armada_drm_debugfs_cleanup(priv->drm.primary); #endif drm_dev_unregister(&priv->drm); component_unbind_all(dev, &priv->drm); drm_mode_config_cleanup(&priv->drm); drm_mm_takedown(&priv->linear); flush_work(&priv->fb_unref_work); drm_dev_unref(&priv->drm); }

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static int compare_of(struct device *dev, void *data) { return dev->of_node == data; }

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static int compare_dev_name(struct device *dev, void *data) { const char *name = data; return !strcmp(dev_name(dev), name); }

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static void armada_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; } drm_of_component_match_add(dev, match, compare_of, remote); of_node_put(remote); } }

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static const struct component_master_ops armada_master_ops = { .bind = armada_drm_bind, .unbind = armada_drm_unbind, };
static int armada_drm_probe(struct platform_device *pdev) { struct component_match *match = NULL; struct device *dev = &pdev->dev; int ret; ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops); if (ret != -EINVAL) return ret; if (dev->platform_data) { char **devices = dev->platform_data; struct device_node *port; struct device *d; int i; for (i = 0; devices[i]; i++) component_match_add(dev, &match, compare_dev_name, devices[i]); if (i == 0) { dev_err(dev, "missing 'ports' property\n"); return -ENODEV; } for (i = 0; devices[i]; i++) { d = bus_find_device_by_name(&platform_bus_type, NULL, devices[i]); if (d && d->of_node) { for_each_child_of_node(d->of_node, port) armada_add_endpoints(dev, &match, port); } put_device(d); } } return component_master_add_with_match(&pdev->dev, &armada_master_ops, match); }

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Russell King17283.09%266.67%
Liviu Dudau3516.91%133.33%
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static int armada_drm_remove(struct platform_device *pdev) { component_master_del(&pdev->dev, &armada_master_ops); return 0; }

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static const struct platform_device_id armada_drm_platform_ids[] = { { .name = "armada-drm", }, { .name = "armada-510-drm", }, { }, }; MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); static struct platform_driver armada_drm_platform_driver = { .probe = armada_drm_probe, .remove = armada_drm_remove, .driver = { .name = "armada-drm", }, .id_table = armada_drm_platform_ids, };
static int __init armada_drm_init(void) { int ret; armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls); ret = platform_driver_register(&armada_lcd_platform_driver); if (ret) return ret; ret = platform_driver_register(&armada_drm_platform_driver); if (ret) platform_driver_unregister(&armada_lcd_platform_driver); return ret; }

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Russell King5698.25%266.67%
Damien Lespiau11.75%133.33%
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module_init(armada_drm_init);
static void __exit armada_drm_exit(void) { platform_driver_unregister(&armada_drm_platform_driver); platform_driver_unregister(&armada_lcd_platform_driver); }

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module_exit(armada_drm_exit); MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); MODULE_DESCRIPTION("Armada DRM Driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:armada-drm");

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Russell King163096.39%969.23%
Liviu Dudau563.31%17.69%
Daniel Vetter40.24%215.38%
Damien Lespiau10.06%17.69%
Total1691100.00%13100.00%
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