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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (C) 2014-2015 Broadcom
- * Copyright (C) 2013 Red Hat
- */
- /**
- * DOC: Broadcom VC4 Graphics Driver
- *
- * The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
- * OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
- * configurable display output pipeline that supports HDMI, DSI, DPI,
- * and Composite TV output.
- *
- * The 3D engine also has an interface for submitting arbitrary
- * compute shader-style jobs using the same shader processor as is
- * used for vertex and fragment shaders in GLES 2.0. However, given
- * that the hardware isn't able to expose any standard interfaces like
- * OpenGL compute shaders or OpenCL, it isn't supported by this
- * driver.
- */
- #include <linux/clk.h>
- #include <linux/component.h>
- #include <linux/device.h>
- #include <linux/dma-mapping.h>
- #include <linux/io.h>
- #include <linux/module.h>
- #include <linux/of_platform.h>
- #include <linux/platform_device.h>
- #include <linux/pm_runtime.h>
- #include <drm/drm_atomic_helper.h>
- #include <drm/drm_drv.h>
- #include <drm/drm_fb_cma_helper.h>
- #include <drm/drm_fb_helper.h>
- #include <drm/drm_vblank.h>
- #include "uapi/drm/vc4_drm.h"
- #include "vc4_drv.h"
- #include "vc4_regs.h"
- #define DRIVER_NAME "vc4"
- #define DRIVER_DESC "Broadcom VC4 graphics"
- #define DRIVER_DATE "20140616"
- #define DRIVER_MAJOR 0
- #define DRIVER_MINOR 0
- #define DRIVER_PATCHLEVEL 0
- /* Helper function for mapping the regs on a platform device. */
- void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index)
- {
- struct resource *res;
- void __iomem *map;
- res = platform_get_resource(dev, IORESOURCE_MEM, index);
- map = devm_ioremap_resource(&dev->dev, res);
- if (IS_ERR(map)) {
- DRM_ERROR("Failed to map registers: %ld\n", PTR_ERR(map));
- return map;
- }
- return map;
- }
- static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
- struct drm_file *file_priv)
- {
- struct vc4_dev *vc4 = to_vc4_dev(dev);
- struct drm_vc4_get_param *args = data;
- int ret;
- if (args->pad != 0)
- return -EINVAL;
- if (!vc4->v3d)
- return -ENODEV;
- switch (args->param) {
- case DRM_VC4_PARAM_V3D_IDENT0:
- ret = vc4_v3d_pm_get(vc4);
- if (ret)
- return ret;
- args->value = V3D_READ(V3D_IDENT0);
- vc4_v3d_pm_put(vc4);
- break;
- case DRM_VC4_PARAM_V3D_IDENT1:
- ret = vc4_v3d_pm_get(vc4);
- if (ret)
- return ret;
- args->value = V3D_READ(V3D_IDENT1);
- vc4_v3d_pm_put(vc4);
- break;
- case DRM_VC4_PARAM_V3D_IDENT2:
- ret = vc4_v3d_pm_get(vc4);
- if (ret)
- return ret;
- args->value = V3D_READ(V3D_IDENT2);
- vc4_v3d_pm_put(vc4);
- break;
- case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
- case DRM_VC4_PARAM_SUPPORTS_ETC1:
- case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
- case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
- case DRM_VC4_PARAM_SUPPORTS_MADVISE:
- case DRM_VC4_PARAM_SUPPORTS_PERFMON:
- args->value = true;
- break;
- default:
- DRM_DEBUG("Unknown parameter %d\n", args->param);
- return -EINVAL;
- }
- return 0;
- }
- static int vc4_open(struct drm_device *dev, struct drm_file *file)
- {
- struct vc4_file *vc4file;
- vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
- if (!vc4file)
- return -ENOMEM;
- vc4_perfmon_open_file(vc4file);
- file->driver_priv = vc4file;
- return 0;
- }
- static void vc4_close(struct drm_device *dev, struct drm_file *file)
- {
- struct vc4_dev *vc4 = to_vc4_dev(dev);
- struct vc4_file *vc4file = file->driver_priv;
- if (vc4file->bin_bo_used)
- vc4_v3d_bin_bo_put(vc4);
- vc4_perfmon_close_file(vc4file);
- kfree(vc4file);
- }
- static const struct vm_operations_struct vc4_vm_ops = {
- .fault = vc4_fault,
- .open = drm_gem_vm_open,
- .close = drm_gem_vm_close,
- };
- static const struct file_operations vc4_drm_fops = {
- .owner = THIS_MODULE,
- .open = drm_open,
- .release = drm_release,
- .unlocked_ioctl = drm_ioctl,
- .mmap = vc4_mmap,
- .poll = drm_poll,
- .read = drm_read,
- .compat_ioctl = drm_compat_ioctl,
- .llseek = noop_llseek,
- };
- static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
- DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
- DRM_ROOT_ONLY),
- DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
- DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
- };
- static struct drm_driver vc4_drm_driver = {
- .driver_features = (DRIVER_MODESET |
- DRIVER_ATOMIC |
- DRIVER_GEM |
- DRIVER_RENDER |
- DRIVER_SYNCOBJ),
- .open = vc4_open,
- .postclose = vc4_close,
- .irq_handler = vc4_irq,
- .irq_preinstall = vc4_irq_preinstall,
- .irq_postinstall = vc4_irq_postinstall,
- .irq_uninstall = vc4_irq_uninstall,
- #if defined(CONFIG_DEBUG_FS)
- .debugfs_init = vc4_debugfs_init,
- #endif
- .gem_create_object = vc4_create_object,
- .gem_free_object_unlocked = vc4_free_object,
- .gem_vm_ops = &vc4_vm_ops,
- .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
- .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
- .gem_prime_export = vc4_prime_export,
- .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
- .gem_prime_import_sg_table = vc4_prime_import_sg_table,
- .gem_prime_vmap = vc4_prime_vmap,
- .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
- .gem_prime_mmap = vc4_prime_mmap,
- .dumb_create = vc4_dumb_create,
- .ioctls = vc4_drm_ioctls,
- .num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
- .fops = &vc4_drm_fops,
- .name = DRIVER_NAME,
- .desc = DRIVER_DESC,
- .date = DRIVER_DATE,
- .major = DRIVER_MAJOR,
- .minor = DRIVER_MINOR,
- .patchlevel = DRIVER_PATCHLEVEL,
- };
- static int compare_dev(struct device *dev, void *data)
- {
- return dev == data;
- }
- static void vc4_match_add_drivers(struct device *dev,
- struct component_match **match,
- struct platform_driver *const *drivers,
- int count)
- {
- int i;
- for (i = 0; i < count; i++) {
- struct device_driver *drv = &drivers[i]->driver;
- struct device *p = NULL, *d;
- while ((d = platform_find_device_by_driver(p, drv))) {
- put_device(p);
- component_match_add(dev, match, compare_dev, d);
- p = d;
- }
- put_device(p);
- }
- }
- static int vc4_drm_bind(struct device *dev)
- {
- struct platform_device *pdev = to_platform_device(dev);
- struct drm_device *drm;
- struct vc4_dev *vc4;
- struct device_node *node;
- struct drm_crtc *crtc;
- int ret = 0;
- dev->coherent_dma_mask = DMA_BIT_MASK(32);
- /* If VC4 V3D is missing, don't advertise render nodes. */
- node = of_find_matching_node_and_match(NULL, vc4_v3d_dt_match, NULL);
- if (!node || !of_device_is_available(node))
- vc4_drm_driver.driver_features &= ~DRIVER_RENDER;
- of_node_put(node);
- vc4 = devm_drm_dev_alloc(dev, &vc4_drm_driver, struct vc4_dev, base);
- if (IS_ERR(vc4))
- return PTR_ERR(vc4);
- drm = &vc4->base;
- platform_set_drvdata(pdev, drm);
- INIT_LIST_HEAD(&vc4->debugfs_list);
- mutex_init(&vc4->bin_bo_lock);
- ret = vc4_bo_cache_init(drm);
- if (ret)
- return ret;
- ret = drmm_mode_config_init(drm);
- if (ret)
- return ret;
- ret = vc4_gem_init(drm);
- if (ret)
- return ret;
- ret = component_bind_all(dev, drm);
- if (ret)
- return ret;
- ret = vc4_plane_create_additional_planes(drm);
- if (ret)
- goto unbind_all;
- drm_fb_helper_remove_conflicting_framebuffers(NULL, "vc4drmfb", false);
- ret = vc4_kms_load(drm);
- if (ret < 0)
- goto unbind_all;
- drm_for_each_crtc(crtc, drm)
- vc4_crtc_disable_at_boot(crtc);
- ret = drm_dev_register(drm, 0);
- if (ret < 0)
- goto unbind_all;
- drm_fbdev_generic_setup(drm, 16);
- return 0;
- unbind_all:
- component_unbind_all(dev, drm);
- return ret;
- }
- static void vc4_drm_unbind(struct device *dev)
- {
- struct drm_device *drm = dev_get_drvdata(dev);
- drm_dev_unregister(drm);
- drm_atomic_helper_shutdown(drm);
- }
- static const struct component_master_ops vc4_drm_ops = {
- .bind = vc4_drm_bind,
- .unbind = vc4_drm_unbind,
- };
- static struct platform_driver *const component_drivers[] = {
- &vc4_hdmi_driver,
- &vc4_vec_driver,
- &vc4_dpi_driver,
- &vc4_dsi_driver,
- &vc4_hvs_driver,
- &vc4_txp_driver,
- &vc4_crtc_driver,
- &vc4_v3d_driver,
- };
- static int vc4_platform_drm_probe(struct platform_device *pdev)
- {
- struct component_match *match = NULL;
- struct device *dev = &pdev->dev;
- vc4_match_add_drivers(dev, &match,
- component_drivers, ARRAY_SIZE(component_drivers));
- return component_master_add_with_match(dev, &vc4_drm_ops, match);
- }
- static int vc4_platform_drm_remove(struct platform_device *pdev)
- {
- component_master_del(&pdev->dev, &vc4_drm_ops);
- return 0;
- }
- static const struct of_device_id vc4_of_match[] = {
- { .compatible = "brcm,bcm2711-vc5", },
- { .compatible = "brcm,bcm2835-vc4", },
- { .compatible = "brcm,cygnus-vc4", },
- {},
- };
- MODULE_DEVICE_TABLE(of, vc4_of_match);
- static struct platform_driver vc4_platform_driver = {
- .probe = vc4_platform_drm_probe,
- .remove = vc4_platform_drm_remove,
- .driver = {
- .name = "vc4-drm",
- .of_match_table = vc4_of_match,
- },
- };
- static int __init vc4_drm_register(void)
- {
- int ret;
- ret = platform_register_drivers(component_drivers,
- ARRAY_SIZE(component_drivers));
- if (ret)
- return ret;
- return platform_driver_register(&vc4_platform_driver);
- }
- static void __exit vc4_drm_unregister(void)
- {
- platform_unregister_drivers(component_drivers,
- ARRAY_SIZE(component_drivers));
- platform_driver_unregister(&vc4_platform_driver);
- }
- module_init(vc4_drm_register);
- module_exit(vc4_drm_unregister);
- MODULE_ALIAS("platform:vc4-drm");
- MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
- MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
- MODULE_LICENSE("GPL v2");
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