1 files changed, 111 insertions, 0 deletions
diff --git a/drivers/gpu/drm/armada/armada_debugfs.c b/drivers/gpu/drm/armada/armada_debugfs.c
new file mode 100644
index 000000000..29f4b52e3
--- /dev/null
+++ b/drivers/gpu/drm/armada/armada_debugfs.c
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2012 Russell King
+ *  Rewritten from the dovefb driver, and Armada510 manuals.
+ */
+
+#include <linux/ctype.h>
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>
+
+#include <drm/drm_debugfs.h>
+#include <drm/drm_file.h>
+
+#include "armada_crtc.h"
+#include "armada_drm.h"
+
+static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = m->private;
+	struct drm_device *dev = node->minor->dev;
+	struct armada_private *priv = drm_to_armada_dev(dev);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	mutex_lock(&priv->linear_lock);
+	drm_mm_print(&priv->linear, &p);
+	mutex_unlock(&priv->linear_lock);
+
+	return 0;
+}
+
+static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
+{
+	struct armada_crtc *dcrtc = m->private;
+	int i;
+
+	for (i = 0x84; i <= 0x1c4; i += 4) {
+		u32 v = readl_relaxed(dcrtc->base + i);
+		seq_printf(m, "0x%04x: 0x%08x\n", i, v);
+	}
+
+	return 0;
+}
+
+static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, armada_debugfs_crtc_reg_show,
+			   inode->i_private);
+}
+
+static int armada_debugfs_crtc_reg_write(struct file *file,
+	const char __user *ptr, size_t len, loff_t *off)
+{
+	struct armada_crtc *dcrtc;
+	unsigned long reg, mask, val;
+	char buf[32];
+	int ret;
+	u32 v;
+
+	if (*off != 0)
+		return 0;
+
+	if (len > sizeof(buf) - 1)
+		len = sizeof(buf) - 1;
+
+	ret = strncpy_from_user(buf, ptr, len);
+	if (ret < 0)
+		return ret;
+	buf[len] = '\0';
+
+	if (sscanf(buf, "%lx %lx %lx", &reg, &mask, &val) != 3)
+		return -EINVAL;
+	if (reg < 0x84 || reg > 0x1c4 || reg & 3)
+		return -ERANGE;
+
+	dcrtc = ((struct seq_file *)file->private_data)->private;
+	v = readl(dcrtc->base + reg);
+	v &= ~mask;
+	v |= val & mask;
+	writel(v, dcrtc->base + reg);
+
+	return len;
+}
+
+static const struct file_operations armada_debugfs_crtc_reg_fops = {
+	.owner = THIS_MODULE,
+	.open = armada_debugfs_crtc_reg_open,
+	.read = seq_read,
+	.write = armada_debugfs_crtc_reg_write,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)
+{
+	debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,
+			    dcrtc, &armada_debugfs_crtc_reg_fops);
+}
+
+static struct drm_info_list armada_debugfs_list[] = {
+	{ "gem_linear", armada_debugfs_gem_linear_show, 0 },
+};
+#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
+
+int armada_drm_debugfs_init(struct drm_minor *minor)
+{
+	drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
+				 minor->debugfs_root, minor);
+
+	return 0;
+}