drivers/gpu/drm/vc4/vc4_debugfs.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/vc4/vc4_debugfs.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/vc4/vc4_debugfs.c
Extension
.c
Size
1330 bytes
Lines
60
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Copyright © 2014 Broadcom
 */

#include <drm/drm_drv.h>
#include <drm/drm_print.h>

#include <linux/seq_file.h>
#include <linux/circ_buf.h>
#include <linux/ctype.h>
#include <linux/debugfs.h>
#include <linux/platform_device.h>

#include "vc4_drv.h"
#include "vc4_regs.h"

/*
 * Called at drm_dev_register() time on each of the minors registered
 * by the DRM device, to attach the debugfs files.
 */
void
vc4_debugfs_init(struct drm_minor *minor)
{
	struct vc4_dev *vc4 = to_vc4_dev(minor->dev);
	struct drm_device *drm = &vc4->base;

	drm_WARN_ON(drm, vc4_hvs_debugfs_init(minor));

	if (vc4->v3d) {
		drm_WARN_ON(drm, vc4_bo_debugfs_init(minor));
		drm_WARN_ON(drm, vc4_v3d_debugfs_init(minor));
	}
}

static int vc4_debugfs_regset32(struct seq_file *m, void *unused)
{
	struct drm_debugfs_entry *entry = m->private;
	struct drm_device *drm = entry->dev;
	struct debugfs_regset32 *regset = entry->file.data;
	struct drm_printer p = drm_seq_file_printer(m);
	int idx;

	if (!drm_dev_enter(drm, &idx))
		return -ENODEV;

	drm_print_regset32(&p, regset);

	drm_dev_exit(idx);

	return 0;
}

void vc4_debugfs_add_regset32(struct drm_device *drm,
			      const char *name,
			      struct debugfs_regset32 *regset)
{
	drm_debugfs_add_file(drm, name, vc4_debugfs_regset32, regset);
}

Annotation

Implementation Notes