drm/armada: redo CRTC debugfs files

Move the CRTC debugfs files into the CRTC specific directory.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

drivers/gpu/drm/armada/armada_crtc.c

@@ -774,6 +774,14 @@ static void armada_drm_crtc_destroy(struct drm_crtc *crtc)
 	kfree(dcrtc);
 }
 
+static int armada_drm_crtc_late_register(struct drm_crtc *crtc)
+{
+	if (IS_ENABLED(CONFIG_DEBUG_FS))
+		armada_drm_crtc_debugfs_init(drm_to_armada_crtc(crtc));
+
+	return 0;
+}
+
 /* These are called under the vbl_lock. */
 static int armada_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 {
@@ -806,6 +814,7 @@ static const struct drm_crtc_funcs armada_crtc_funcs = {
 	.page_flip	= drm_atomic_helper_page_flip,
 	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+	.late_register	= armada_drm_crtc_late_register,
 	.enable_vblank	= armada_drm_crtc_enable_vblank,
 	.disable_vblank	= armada_drm_crtc_disable_vblank,
 };

drivers/gpu/drm/armada/armada_debugfs.c

@@ -28,50 +28,33 @@ static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
 	return 0;
 }
 
-static int armada_debugfs_reg_show(struct seq_file *m, void *data)
+static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
 {
-	struct drm_device *dev = m->private;
-	struct armada_private *priv = dev->dev_private;
-	int n, i;
-
-	if (priv) {
-		for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
-			struct armada_crtc *dcrtc = priv->dcrtc[n];
-			if (!dcrtc)
-				continue;
-
-			for (i = 0x84; i <= 0x1c4; i += 4) {
-				uint32_t v = readl_relaxed(dcrtc->base + i);
-				seq_printf(m, "%u: 0x%04x: 0x%08x\n", n, i, v);
-			}
-		}
+	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_reg_r_open(struct inode *inode, struct file *file)
+static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
 {
-	return single_open(file, armada_debugfs_reg_show, inode->i_private);
+	return single_open(file, armada_debugfs_crtc_reg_show,
+			   inode->i_private);
 }
 
-static const struct file_operations fops_reg_r = {
-	.owner = THIS_MODULE,
-	.open = armada_debugfs_reg_r_open,
-	.read = seq_read,
-	.llseek = seq_lseek,
-	.release = single_release,
-};
-
-static int armada_debugfs_write(struct file *file, const char __user *ptr,
-	size_t len, loff_t *off)
+static int armada_debugfs_crtc_reg_write(struct file *file,
+	const char __user *ptr, size_t len, loff_t *off)
 {
-	struct drm_device *dev = file->private_data;
-	struct armada_private *priv = dev->dev_private;
-	struct armada_crtc *dcrtc = priv->dcrtc[0];
-	char buf[32], *p;
-	uint32_t reg, val;
+	struct armada_crtc *dcrtc;
+	unsigned long reg, mask, val;
+	char buf[32];
 	int ret;
+	u32 v;
 
 	if (*off != 0)
 		return 0;
@@ -84,24 +67,35 @@ static int armada_debugfs_write(struct file *file, const char __user *ptr,
 		return ret;
 	buf[len] = '\0';
 
-	reg = simple_strtoul(buf, &p, 16);
-	if (!isspace(*p))
+	if (sscanf(buf, "%lx %lx %lx", &reg, &mask, &val) != 3)
 		return -EINVAL;
-	val = simple_strtoul(p + 1, NULL, 16);
+	if (reg < 0x84 || reg > 0x1c4 || reg & 3)
+		return -ERANGE;
 
-	if (reg >= 0x84 && reg <= 0x1c4)
-		writel(val, dcrtc->base + reg);
+	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 fops_reg_w = {
+static const struct file_operations armada_debugfs_crtc_reg_fops = {
 	.owner = THIS_MODULE,
-	.open = simple_open,
-	.write = armada_debugfs_write,
-	.llseek = noop_llseek,
+	.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 },
 };
@@ -109,24 +103,8 @@ static struct drm_info_list armada_debugfs_list[] = {
 
 int armada_drm_debugfs_init(struct drm_minor *minor)
 {
-	struct dentry *de;
-	int ret;
-
-	ret = drm_debugfs_create_files(armada_debugfs_list,
-				       ARMADA_DEBUGFS_ENTRIES,
-				       minor->debugfs_root, minor);
-	if (ret)
-		return ret;
-
-	de = debugfs_create_file("reg", S_IFREG | S_IRUSR,
-				 minor->debugfs_root, minor->dev, &fops_reg_r);
-	if (!de)
-		return -ENOMEM;
-
-	de = debugfs_create_file("reg_wr", S_IFREG | S_IWUSR,
-				 minor->debugfs_root, minor->dev, &fops_reg_w);
-	if (!de)
-		return -ENOMEM;
+	drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
+				 minor->debugfs_root, minor);
 
 	return 0;
 }

drivers/gpu/drm/armada/armada_drm.h

@@ -78,6 +78,7 @@ void armada_fbdev_fini(struct drm_device *);
 
 int armada_overlay_plane_create(struct drm_device *, unsigned long);
 
+void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc);
 int armada_drm_debugfs_init(struct drm_minor *);
 
 #endif