| // 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_aperture.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)) |
| 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); |
| } |
| |
| DEFINE_DRM_GEM_FOPS(vc4_drm_fops); |
| |
| 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, |
| |
| #if defined(CONFIG_DEBUG_FS) |
| .debugfs_init = vc4_debugfs_init, |
| #endif |
| |
| .gem_create_object = vc4_create_object, |
| |
| DRM_GEM_CMA_DRIVER_OPS_WITH_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; |
| |
| ret = drm_aperture_remove_framebuffers(false, &vc4_drm_driver); |
| if (ret) |
| goto unbind_all; |
| |
| 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, |
| }; |
| |
| /* |
| * This list determines the binding order of our components, and we have |
| * a few constraints: |
| * - The TXP driver needs to be bound before the PixelValves (CRTC) |
| * but after the HVS to set the possible_crtc field properly |
| * - The HDMI driver needs to be bound after the HVS so that we can |
| * lookup the HVS maximum core clock rate and figure out if we |
| * support 4kp60 or not. |
| */ |
| static struct platform_driver *const component_drivers[] = { |
| &vc4_hvs_driver, |
| &vc4_hdmi_driver, |
| &vc4_vec_driver, |
| &vc4_dpi_driver, |
| &vc4_dsi_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"); |