1 files changed, 501 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
new file mode 100644
index 000000000..b6384a5df
--- /dev/null
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -0,0 +1,501 @@
+// 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_helper.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),
+};
+
+static 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,
+};
+
+static 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);
+	INIT_LIST_HEAD(&vc4->debugfs_list);
+
+	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(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");