501 lines
12 KiB
C
501 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2014-2015 Broadcom
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* Copyright (C) 2013 Red Hat
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*/
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/**
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* DOC: Broadcom VC4 Graphics Driver
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*
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* The Broadcom VideoCore 4 (present in the Raspberry Pi) contains a
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* OpenGL ES 2.0-compatible 3D engine called V3D, and a highly
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* configurable display output pipeline that supports HDMI, DSI, DPI,
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* and Composite TV output.
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*
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* The 3D engine also has an interface for submitting arbitrary
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* compute shader-style jobs using the same shader processor as is
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* used for vertex and fragment shaders in GLES 2.0. However, given
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* that the hardware isn't able to expose any standard interfaces like
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* OpenGL compute shaders or OpenCL, it isn't supported by this
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* driver.
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <drm/drm_aperture.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fbdev_dma.h>
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#include <drm/drm_vblank.h>
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#include <soc/bcm2835/raspberrypi-firmware.h>
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#include "uapi/drm/vc4_drm.h"
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#include "vc4_drv.h"
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#include "vc4_regs.h"
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#define DRIVER_NAME "vc4"
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#define DRIVER_DESC "Broadcom VC4 graphics"
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#define DRIVER_DATE "20140616"
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#define DRIVER_MAJOR 0
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#define DRIVER_MINOR 0
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#define DRIVER_PATCHLEVEL 0
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/* Helper function for mapping the regs on a platform device. */
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void __iomem *vc4_ioremap_regs(struct platform_device *pdev, int index)
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{
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void __iomem *map;
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map = devm_platform_ioremap_resource(pdev, index);
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if (IS_ERR(map))
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return map;
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return map;
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}
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int vc4_dumb_fixup_args(struct drm_mode_create_dumb *args)
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{
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int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
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if (args->pitch < min_pitch)
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args->pitch = min_pitch;
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if (args->size < args->pitch * args->height)
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args->size = args->pitch * args->height;
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return 0;
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}
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static int vc5_dumb_create(struct drm_file *file_priv,
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struct drm_device *dev,
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struct drm_mode_create_dumb *args)
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{
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int ret;
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ret = vc4_dumb_fixup_args(args);
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if (ret)
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return ret;
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return drm_gem_dma_dumb_create_internal(file_priv, dev, args);
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}
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static int vc4_get_param_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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struct drm_vc4_get_param *args = data;
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int ret;
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if (args->pad != 0)
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return -EINVAL;
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if (WARN_ON_ONCE(vc4->is_vc5))
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return -ENODEV;
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if (!vc4->v3d)
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return -ENODEV;
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switch (args->param) {
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case DRM_VC4_PARAM_V3D_IDENT0:
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ret = vc4_v3d_pm_get(vc4);
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if (ret)
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return ret;
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args->value = V3D_READ(V3D_IDENT0);
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vc4_v3d_pm_put(vc4);
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break;
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case DRM_VC4_PARAM_V3D_IDENT1:
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ret = vc4_v3d_pm_get(vc4);
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if (ret)
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return ret;
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args->value = V3D_READ(V3D_IDENT1);
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vc4_v3d_pm_put(vc4);
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break;
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case DRM_VC4_PARAM_V3D_IDENT2:
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ret = vc4_v3d_pm_get(vc4);
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if (ret)
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return ret;
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args->value = V3D_READ(V3D_IDENT2);
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vc4_v3d_pm_put(vc4);
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break;
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case DRM_VC4_PARAM_SUPPORTS_BRANCHES:
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case DRM_VC4_PARAM_SUPPORTS_ETC1:
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case DRM_VC4_PARAM_SUPPORTS_THREADED_FS:
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case DRM_VC4_PARAM_SUPPORTS_FIXED_RCL_ORDER:
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case DRM_VC4_PARAM_SUPPORTS_MADVISE:
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case DRM_VC4_PARAM_SUPPORTS_PERFMON:
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args->value = true;
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break;
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default:
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DRM_DEBUG("Unknown parameter %d\n", args->param);
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return -EINVAL;
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}
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return 0;
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}
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static int vc4_open(struct drm_device *dev, struct drm_file *file)
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{
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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struct vc4_file *vc4file;
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if (WARN_ON_ONCE(vc4->is_vc5))
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return -ENODEV;
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vc4file = kzalloc(sizeof(*vc4file), GFP_KERNEL);
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if (!vc4file)
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return -ENOMEM;
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vc4file->dev = vc4;
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vc4_perfmon_open_file(vc4file);
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file->driver_priv = vc4file;
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return 0;
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}
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static void vc4_close(struct drm_device *dev, struct drm_file *file)
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{
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struct vc4_dev *vc4 = to_vc4_dev(dev);
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struct vc4_file *vc4file = file->driver_priv;
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if (WARN_ON_ONCE(vc4->is_vc5))
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return;
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if (vc4file->bin_bo_used)
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vc4_v3d_bin_bo_put(vc4);
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vc4_perfmon_close_file(vc4file);
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kfree(vc4file);
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}
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DEFINE_DRM_GEM_FOPS(vc4_drm_fops);
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static const struct drm_ioctl_desc vc4_drm_ioctls[] = {
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DRM_IOCTL_DEF_DRV(VC4_SUBMIT_CL, vc4_submit_cl_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_WAIT_SEQNO, vc4_wait_seqno_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_WAIT_BO, vc4_wait_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_CREATE_BO, vc4_create_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_MMAP_BO, vc4_mmap_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_CREATE_SHADER_BO, vc4_create_shader_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_GET_HANG_STATE, vc4_get_hang_state_ioctl,
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DRM_ROOT_ONLY),
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DRM_IOCTL_DEF_DRV(VC4_GET_PARAM, vc4_get_param_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_SET_TILING, vc4_set_tiling_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_GET_TILING, vc4_get_tiling_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_LABEL_BO, vc4_label_bo_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_GEM_MADVISE, vc4_gem_madvise_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_PERFMON_CREATE, vc4_perfmon_create_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_PERFMON_DESTROY, vc4_perfmon_destroy_ioctl, DRM_RENDER_ALLOW),
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DRM_IOCTL_DEF_DRV(VC4_PERFMON_GET_VALUES, vc4_perfmon_get_values_ioctl, DRM_RENDER_ALLOW),
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};
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const struct drm_driver vc4_drm_driver = {
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.driver_features = (DRIVER_MODESET |
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DRIVER_ATOMIC |
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DRIVER_GEM |
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DRIVER_RENDER |
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DRIVER_SYNCOBJ),
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.open = vc4_open,
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.postclose = vc4_close,
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#if defined(CONFIG_DEBUG_FS)
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.debugfs_init = vc4_debugfs_init,
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#endif
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.gem_create_object = vc4_create_object,
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DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc4_bo_dumb_create),
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.ioctls = vc4_drm_ioctls,
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.num_ioctls = ARRAY_SIZE(vc4_drm_ioctls),
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.fops = &vc4_drm_fops,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = DRIVER_DATE,
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.major = DRIVER_MAJOR,
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.minor = DRIVER_MINOR,
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.patchlevel = DRIVER_PATCHLEVEL,
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};
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const struct drm_driver vc5_drm_driver = {
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.driver_features = (DRIVER_MODESET |
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DRIVER_ATOMIC |
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DRIVER_GEM),
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#if defined(CONFIG_DEBUG_FS)
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.debugfs_init = vc4_debugfs_init,
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#endif
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DRM_GEM_DMA_DRIVER_OPS_WITH_DUMB_CREATE(vc5_dumb_create),
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.fops = &vc4_drm_fops,
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.name = DRIVER_NAME,
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.desc = DRIVER_DESC,
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.date = DRIVER_DATE,
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.major = DRIVER_MAJOR,
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.minor = DRIVER_MINOR,
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.patchlevel = DRIVER_PATCHLEVEL,
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};
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static void vc4_match_add_drivers(struct device *dev,
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struct component_match **match,
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struct platform_driver *const *drivers,
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int count)
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{
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int i;
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for (i = 0; i < count; i++) {
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struct device_driver *drv = &drivers[i]->driver;
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struct device *p = NULL, *d;
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while ((d = platform_find_device_by_driver(p, drv))) {
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put_device(p);
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component_match_add(dev, match, component_compare_dev, d);
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p = d;
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}
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put_device(p);
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}
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}
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static void vc4_component_unbind_all(void *ptr)
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{
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struct vc4_dev *vc4 = ptr;
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component_unbind_all(vc4->dev, &vc4->base);
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}
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static const struct of_device_id vc4_dma_range_matches[] = {
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{ .compatible = "brcm,bcm2711-hvs" },
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{ .compatible = "brcm,bcm2835-hvs" },
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{ .compatible = "brcm,bcm2835-v3d" },
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{ .compatible = "brcm,cygnus-v3d" },
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{ .compatible = "brcm,vc4-v3d" },
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{}
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};
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static int vc4_drm_bind(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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const struct drm_driver *driver;
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struct rpi_firmware *firmware = NULL;
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struct drm_device *drm;
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struct vc4_dev *vc4;
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struct device_node *node;
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struct drm_crtc *crtc;
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bool is_vc5;
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int ret = 0;
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dev->coherent_dma_mask = DMA_BIT_MASK(32);
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is_vc5 = of_device_is_compatible(dev->of_node, "brcm,bcm2711-vc5");
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if (is_vc5)
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driver = &vc5_drm_driver;
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else
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driver = &vc4_drm_driver;
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node = of_find_matching_node_and_match(NULL, vc4_dma_range_matches,
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NULL);
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if (node) {
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ret = of_dma_configure(dev, node, true);
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of_node_put(node);
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if (ret)
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return ret;
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}
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vc4 = devm_drm_dev_alloc(dev, driver, struct vc4_dev, base);
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if (IS_ERR(vc4))
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return PTR_ERR(vc4);
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vc4->is_vc5 = is_vc5;
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vc4->dev = dev;
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drm = &vc4->base;
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platform_set_drvdata(pdev, drm);
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if (!is_vc5) {
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ret = drmm_mutex_init(drm, &vc4->bin_bo_lock);
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if (ret)
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return ret;
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ret = vc4_bo_cache_init(drm);
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if (ret)
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return ret;
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}
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ret = drmm_mode_config_init(drm);
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if (ret)
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return ret;
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if (!is_vc5) {
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ret = vc4_gem_init(drm);
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if (ret)
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return ret;
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}
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node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware");
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if (node) {
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firmware = rpi_firmware_get(node);
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of_node_put(node);
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if (!firmware)
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return -EPROBE_DEFER;
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}
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ret = drm_aperture_remove_framebuffers(driver);
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if (ret)
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return ret;
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if (firmware) {
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ret = rpi_firmware_property(firmware,
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RPI_FIRMWARE_NOTIFY_DISPLAY_DONE,
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NULL, 0);
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if (ret)
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drm_warn(drm, "Couldn't stop firmware display driver: %d\n", ret);
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rpi_firmware_put(firmware);
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}
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ret = component_bind_all(dev, drm);
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if (ret)
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return ret;
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ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4);
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if (ret)
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return ret;
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ret = vc4_plane_create_additional_planes(drm);
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if (ret)
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goto unbind_all;
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ret = vc4_kms_load(drm);
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if (ret < 0)
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goto unbind_all;
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drm_for_each_crtc(crtc, drm)
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vc4_crtc_disable_at_boot(crtc);
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ret = drm_dev_register(drm, 0);
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if (ret < 0)
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goto unbind_all;
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drm_fbdev_dma_setup(drm, 16);
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return 0;
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unbind_all:
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return ret;
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}
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static void vc4_drm_unbind(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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drm_dev_unplug(drm);
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drm_atomic_helper_shutdown(drm);
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}
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static const struct component_master_ops vc4_drm_ops = {
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.bind = vc4_drm_bind,
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.unbind = vc4_drm_unbind,
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};
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/*
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* This list determines the binding order of our components, and we have
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* a few constraints:
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* - The TXP driver needs to be bound before the PixelValves (CRTC)
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* but after the HVS to set the possible_crtc field properly
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* - The HDMI driver needs to be bound after the HVS so that we can
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* lookup the HVS maximum core clock rate and figure out if we
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* support 4kp60 or not.
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*/
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static struct platform_driver *const component_drivers[] = {
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&vc4_hvs_driver,
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&vc4_hdmi_driver,
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&vc4_vec_driver,
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&vc4_dpi_driver,
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&vc4_dsi_driver,
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&vc4_txp_driver,
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&vc4_crtc_driver,
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&vc4_v3d_driver,
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};
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static int vc4_platform_drm_probe(struct platform_device *pdev)
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{
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struct component_match *match = NULL;
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struct device *dev = &pdev->dev;
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vc4_match_add_drivers(dev, &match,
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component_drivers, ARRAY_SIZE(component_drivers));
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return component_master_add_with_match(dev, &vc4_drm_ops, match);
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}
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static int vc4_platform_drm_remove(struct platform_device *pdev)
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{
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component_master_del(&pdev->dev, &vc4_drm_ops);
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return 0;
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}
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static const struct of_device_id vc4_of_match[] = {
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{ .compatible = "brcm,bcm2711-vc5", },
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{ .compatible = "brcm,bcm2835-vc4", },
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{ .compatible = "brcm,cygnus-vc4", },
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{},
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};
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MODULE_DEVICE_TABLE(of, vc4_of_match);
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static struct platform_driver vc4_platform_driver = {
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.probe = vc4_platform_drm_probe,
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.remove = vc4_platform_drm_remove,
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.driver = {
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.name = "vc4-drm",
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.of_match_table = vc4_of_match,
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},
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};
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static int __init vc4_drm_register(void)
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{
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int ret;
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if (drm_firmware_drivers_only())
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return -ENODEV;
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ret = platform_register_drivers(component_drivers,
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ARRAY_SIZE(component_drivers));
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if (ret)
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return ret;
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ret = platform_driver_register(&vc4_platform_driver);
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if (ret)
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platform_unregister_drivers(component_drivers,
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ARRAY_SIZE(component_drivers));
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return ret;
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}
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static void __exit vc4_drm_unregister(void)
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{
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platform_unregister_drivers(component_drivers,
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ARRAY_SIZE(component_drivers));
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platform_driver_unregister(&vc4_platform_driver);
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}
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module_init(vc4_drm_register);
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module_exit(vc4_drm_unregister);
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MODULE_ALIAS("platform:vc4-drm");
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MODULE_SOFTDEP("pre: snd-soc-hdmi-codec");
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MODULE_DESCRIPTION("Broadcom VC4 DRM Driver");
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MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
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MODULE_LICENSE("GPL v2");
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