drivers/gpu/drm/msm/msm_debugfs.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/msm/msm_debugfs.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/msm/msm_debugfs.c
Extension
.c
Size
9040 bytes
Lines
415
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern 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

static const struct file_operations msm_gpu_fops = {
	.owner = THIS_MODULE,
	.open = msm_gpu_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = msm_gpu_release,
};

#ifdef CONFIG_DRM_MSM_KMS
static int msm_fb_show(struct seq_file *m, void *arg)
{
	struct drm_info_node *node = m->private;
	struct drm_device *dev = node->minor->dev;
	struct drm_framebuffer *fb, *fbdev_fb = NULL;

	if (dev->fb_helper && dev->fb_helper->fb) {
		seq_puts(m, "fbcon ");
		fbdev_fb = dev->fb_helper->fb;
		msm_framebuffer_describe(fbdev_fb, m);
	}

	mutex_lock(&dev->mode_config.fb_lock);
	list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
		if (fb == fbdev_fb)
			continue;

		seq_puts(m, "user ");
		msm_framebuffer_describe(fb, m);
	}
	mutex_unlock(&dev->mode_config.fb_lock);

	return 0;
}

static struct drm_info_list msm_kms_debugfs_list[] = {
		{ "fb", msm_fb_show },
};

/*
 * Display Snapshot:
 */

static int msm_kms_show(struct seq_file *m, void *arg)
{
	struct drm_printer p = drm_seq_file_printer(m);
	struct msm_disp_state *state = m->private;

	msm_disp_state_print(state, &p);

	return 0;
}

static int msm_kms_release(struct inode *inode, struct file *file)
{
	struct seq_file *m = file->private_data;
	struct msm_disp_state *state = m->private;

	msm_disp_state_free(state);

	return single_release(inode, file);
}

static int msm_kms_open(struct inode *inode, struct file *file)
{
	struct drm_device *dev = inode->i_private;
	struct msm_drm_private *priv = dev->dev_private;
	struct msm_disp_state *state;
	int ret;

	if (!priv->kms)
		return -ENODEV;

	ret = mutex_lock_interruptible(&priv->kms->dump_mutex);
	if (ret)
		return ret;

	state = msm_disp_snapshot_state_sync(priv->kms);

	mutex_unlock(&priv->kms->dump_mutex);

	if (IS_ERR(state)) {
		return PTR_ERR(state);
	}

	ret = single_open(file, msm_kms_show, state);
	if (ret) {
		msm_disp_state_free(state);
		return ret;
	}

Annotation

Implementation Notes