| // 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_fbdev_generic.h> |
| #include <drm/drm_vblank.h> |
| |
| #include <soc/bcm2835/raspberrypi-firmware.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 *pdev, int index) |
| { |
| void __iomem *map; |
| |
| map = devm_platform_ioremap_resource(pdev, index); |
| if (IS_ERR(map)) |
| return map; |
| |
| return map; |
| } |
| |
| int vc4_dumb_fixup_args(struct drm_mode_create_dumb *args) |
| { |
| int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); |
| |
| if (args->pitch < min_pitch) |
| args->pitch = min_pitch; |
| |
| if (args->size < args->pitch * args->height) |
| args->size = args->pitch * args->height; |
| |
| return 0; |
| } |
| |
| static int vc5_dumb_create(struct drm_file *file_priv, |
| struct drm_device *dev, |
| struct drm_mode_create_dumb *args) |
| { |
| int ret; |
| |
| ret = vc4_dumb_fixup_args(args); |
| if (ret) |
| return ret; |
| |
| return drm_gem_dma_dumb_create_internal(file_priv, dev, args); |
| } |
| |
| 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 (WARN_ON_ONCE(vc4->is_vc5)) |
| return -ENODEV; |
| |
| 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_dev *vc4 = to_vc4_dev(dev); |
| struct vc4_file *vc4file; |
| |
| if (WARN_ON_ONCE(vc4->is_vc5)) |
| return -ENODEV; |
| |
| vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL); |
| if (!vc4file) |
| return -ENOMEM; |
| vc4file->dev = vc4; |
| |
| 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 (WARN_ON_ONCE(vc4->is_vc5)) |
| return; |
| |
| 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), |
| }; |
| |
| const 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_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc4_bo_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, |
| }; |
| |
| const struct drm_driver vc5_drm_driver = { |
| .driver_features = (DRIVER_MODESET | |
| DRIVER_ATOMIC | |
| DRIVER_GEM), |
| |
| #if defined(CONFIG_DEBUG_FS) |
| .debugfs_init = vc4_debugfs_init, |
| #endif |
| |
| DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc5_dumb_create), |
| |
| .fops = &vc4_drm_fops, |
| |
| .name = DRIVER_NAME, |
| .desc = DRIVER_DESC, |
| .date = DRIVER_DATE, |
| .major = DRIVER_MAJOR, |
| .minor = DRIVER_MINOR, |
| .patchlevel = DRIVER_PATCHLEVEL, |
| }; |
| |
| 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, component_compare_dev, d); |
| p = d; |
| } |
| put_device(p); |
| } |
| } |
| |
| static void vc4_component_unbind_all(void *ptr) |
| { |
| struct vc4_dev *vc4 = ptr; |
| |
| component_unbind_all(vc4->dev, &vc4->base); |
| } |
| |
| static const struct of_device_id vc4_dma_range_matches[] = { |
| { .compatible = "brcm,bcm2711-hvs" }, |
| { .compatible = "brcm,bcm2835-hvs" }, |
| { .compatible = "brcm,bcm2835-v3d" }, |
| { .compatible = "brcm,cygnus-v3d" }, |
| { .compatible = "brcm,vc4-v3d" }, |
| {} |
| }; |
| |
| static int vc4_drm_bind(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| const struct drm_driver *driver; |
| struct rpi_firmware *firmware = NULL; |
| struct drm_device *drm; |
| struct vc4_dev *vc4; |
| struct device_node *node; |
| struct drm_crtc *crtc; |
| bool is_vc5; |
| int ret = 0; |
| |
| dev->coherent_dma_mask = DMA_BIT_MASK(32); |
| |
| is_vc5 = of_device_is_compatible(dev->of_node, "brcm,bcm2711-vc5"); |
| if (is_vc5) |
| driver = &vc5_drm_driver; |
| else |
| driver = &vc4_drm_driver; |
| |
| node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches, |
| NULL); |
| if (node) { |
| ret = of_dma_configure(dev, node, true); |
| of_node_put(node); |
| |
| if (ret) |
| return ret; |
| } |
| |
| vc4 = devm_drm_dev_alloc(dev, driver, struct vc4_dev, base); |
| if (IS_ERR(vc4)) |
| return PTR_ERR(vc4); |
| vc4->is_vc5 = is_vc5; |
| vc4->dev = dev; |
| |
| drm = &vc4->base; |
| platform_set_drvdata(pdev, drm); |
| |
| if (!is_vc5) { |
| ret = drmm_mutex_init(drm, &vc4->bin_bo_lock); |
| if (ret) |
| return ret; |
| |
| ret = vc4_bo_cache_init(drm); |
| if (ret) |
| return ret; |
| } |
| |
| ret = drmm_mode_config_init(drm); |
| if (ret) |
| return ret; |
| |
| if (!is_vc5) { |
| ret = vc4_gem_init(drm); |
| if (ret) |
| return ret; |
| } |
| |
| node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware"); |
| if (node) { |
| firmware = rpi_firmware_get(node); |
| of_node_put(node); |
| |
| if (!firmware) |
| return -EPROBE_DEFER; |
| } |
| |
| ret = drm_aperture_remove_framebuffers(false, driver); |
| if (ret) |
| return ret; |
| |
| if (firmware) { |
| ret = rpi_firmware_property(firmware, |
| RPI_FIRMWARE_NOTIFY_DISPLAY_DONE, |
| NULL, 0); |
| if (ret) |
| drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret); |
| |
| rpi_firmware_put(firmware); |
| } |
| |
| ret = component_bind_all(dev, drm); |
| if (ret) |
| return ret; |
| |
| ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4); |
| if (ret) |
| return ret; |
| |
| ret = vc4_plane_create_additional_planes(drm); |
| 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: |
| return ret; |
| } |
| |
| static void vc4_drm_unbind(struct device *dev) |
| { |
| struct drm_device *drm = dev_get_drvdata(dev); |
| |
| drm_dev_unplug(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; |
| |
| if (drm_firmware_drivers_only()) |
| return -ENODEV; |
| |
| ret = platform_register_drivers(component_drivers, |
| ARRAY_SIZE(component_drivers)); |
| if (ret) |
| return ret; |
| |
| ret = platform_driver_register(&vc4_platform_driver); |
| if (ret) |
| platform_unregister_drivers(component_drivers, |
| ARRAY_SIZE(component_drivers)); |
| |
| return ret; |
| } |
| |
| 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_SOFTDEP("pre: snd-soc-hdmi-codec"); |
| MODULE_DESCRIPTION("Broadcom VC4 DRM Driver"); |
| MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); |
| MODULE_LICENSE("GPL v2"); |