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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/aperture.h>
#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_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_client_setup.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_dma.h>
#include <drm/drm_fourcc.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->gen > VC4_GEN_4))
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->gen > VC4_GEN_4))
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->gen > VC4_GEN_4))
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),
DRM_FBDEV_DMA_DRIVER_OPS,
.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),
DRM_FBDEV_DMA_DRIVER_OPS,
.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;
enum vc4_gen gen;
int ret = 0;
dev->coherent_dma_mask = DMA_BIT_MASK(32);
if (of_device_is_compatible(dev->of_node, "brcm,bcm2711-vc5"))
gen = VC4_GEN_5;
else
gen = VC4_GEN_4;
if (gen > VC4_GEN_4)
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->gen = gen;
vc4->dev = dev;
drm = &vc4->base;
platform_set_drvdata(pdev, drm);
if (gen == VC4_GEN_4) {
ret = drmm_mutex_init(drm, &vc4->bin_bo_lock);
if (ret)
goto err;
ret = vc4_bo_cache_init(drm);
if (ret)
goto err;
}
ret = drmm_mode_config_init(drm);
if (ret)
goto err;
if (gen == VC4_GEN_4) {
ret = vc4_gem_init(drm);
if (ret)
goto err;
}
node = of_find_compatible_node(NULL, NULL, "raspberrypi,bcm2835-firmware");
if (node) {
firmware = rpi_firmware_get(node);
of_node_put(node);
if (!firmware) {
ret = -EPROBE_DEFER;
goto err;
}
}
ret = aperture_remove_all_conflicting_devices(driver->name);
if (ret)
goto err;
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)
goto err;
ret = devm_add_action_or_reset(dev, vc4_component_unbind_all, vc4);
if (ret)
goto err;
ret = vc4_plane_create_additional_planes(drm);
if (ret)
goto err;
ret = vc4_kms_load(drm);
if (ret < 0)
goto err;
drm_for_each_crtc(crtc, drm)
vc4_crtc_disable_at_boot(crtc);
ret = drm_dev_register(drm, 0);
if (ret < 0)
goto err;
drm_client_setup_with_fourcc(drm, DRM_FORMAT_RGB565);
return 0;
err:
platform_set_drvdata(pdev, NULL);
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);
dev_set_drvdata(dev, NULL);
}
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 void vc4_platform_drm_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &vc4_drm_ops);
}
static void vc4_platform_drm_shutdown(struct platform_device *pdev)
{
drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
}
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_new = vc4_platform_drm_remove,
.shutdown = vc4_platform_drm_shutdown,
.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");
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