[PATCH v2 21/28] drm: omapdrm: Move all debugfs code from core to dss

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

debugfs code is spread between the core and dss drivers. In preparation
for removal of the core driver, move it all to the dss driver.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/gpu/drm/omapdrm/dss/core.c | 80 --------------------------------------
 drivers/gpu/drm/omapdrm/dss/dss.c  | 77 ++++++++++++++++++++++++++++++++++--
 drivers/gpu/drm/omapdrm/dss/dss.h  | 13 +++++--
 3 files changed, 84 insertions(+), 86 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/core.c b/drivers/gpu/drm/omapdrm/dss/core.c
index ff6357df0588..dc2147ec78f6 100644
--- a/drivers/gpu/drm/omapdrm/dss/core.c
+++ b/drivers/gpu/drm/omapdrm/dss/core.c
@@ -27,8 +27,6 @@
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
-#include <linux/seq_file.h>
-#include <linux/debugfs.h>
 #include <linux/io.h>
 #include <linux/device.h>
 #include <linux/regulator/consumer.h>
@@ -50,72 +48,6 @@ enum omapdss_version omapdss_get_version(void)
 }
 EXPORT_SYMBOL(omapdss_get_version);
 
-#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
-static int dss_debug_show(struct seq_file *s, void *unused)
-{
-	void (*func)(struct seq_file *) = s->private;
-	func(s);
-	return 0;
-}
-
-static int dss_debug_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, dss_debug_show, inode->i_private);
-}
-
-static const struct file_operations dss_debug_fops = {
-	.open           = dss_debug_open,
-	.read           = seq_read,
-	.llseek         = seq_lseek,
-	.release        = single_release,
-};
-
-static struct dentry *dss_debugfs_dir;
-
-static int dss_initialize_debugfs(void)
-{
-	dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
-	if (IS_ERR(dss_debugfs_dir)) {
-		int err = PTR_ERR(dss_debugfs_dir);
-		dss_debugfs_dir = NULL;
-		return err;
-	}
-
-	debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
-			&dss_debug_dump_clocks, &dss_debug_fops);
-
-	return 0;
-}
-
-static void dss_uninitialize_debugfs(void)
-{
-	if (dss_debugfs_dir)
-		debugfs_remove_recursive(dss_debugfs_dir);
-}
-
-int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
-{
-	struct dentry *d;
-
-	d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
-			write, &dss_debug_fops);
-
-	return PTR_ERR_OR_ZERO(d);
-}
-#else /* CONFIG_OMAP2_DSS_DEBUGFS */
-static inline int dss_initialize_debugfs(void)
-{
-	return 0;
-}
-static inline void dss_uninitialize_debugfs(void)
-{
-}
-int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
-{
-	return 0;
-}
-#endif /* CONFIG_OMAP2_DSS_DEBUGFS */
-
 /* PLATFORM DEVICE */
 
 static void dss_disable_all_devices(void)
@@ -133,27 +65,15 @@ static void dss_disable_all_devices(void)
 
 static int __init omap_dss_probe(struct platform_device *pdev)
 {
-	int r;
-
 	core.pdev = pdev;
 
 	dss_features_init(omapdss_get_version());
 
-	r = dss_initialize_debugfs();
-	if (r)
-		goto err_debugfs;
-
 	return 0;
-
-err_debugfs:
-
-	return r;
 }
 
 static int omap_dss_remove(struct platform_device *pdev)
 {
-	dss_uninitialize_debugfs();
-
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/omapdrm/dss/dss.c b/drivers/gpu/drm/omapdrm/dss/dss.c
index 4fdb77dd90b8..618fd4dcbd5a 100644
--- a/drivers/gpu/drm/omapdrm/dss/dss.c
+++ b/drivers/gpu/drm/omapdrm/dss/dss.c
@@ -22,6 +22,7 @@
 
 #define DSS_SUBSYS_NAME "DSS"
 
+#include <linux/debugfs.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/io.h>
@@ -896,7 +897,7 @@ void dss_runtime_put(void)
 
 /* DEBUGFS */
 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
-void dss_debug_dump_clocks(struct seq_file *s)
+static void dss_debug_dump_clocks(struct seq_file *s)
 {
 	dss_dump_clocks(s);
 	dispc_dump_clocks(s);
@@ -904,8 +905,69 @@ void dss_debug_dump_clocks(struct seq_file *s)
 	dsi_dump_clocks(s);
 #endif
 }
-#endif
 
+static int dss_debug_show(struct seq_file *s, void *unused)
+{
+	void (*func)(struct seq_file *) = s->private;
+
+	func(s);
+	return 0;
+}
+
+static int dss_debug_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, dss_debug_show, inode->i_private);
+}
+
+static const struct file_operations dss_debug_fops = {
+	.open           = dss_debug_open,
+	.read           = seq_read,
+	.llseek         = seq_lseek,
+	.release        = single_release,
+};
+
+static struct dentry *dss_debugfs_dir;
+
+static int dss_initialize_debugfs(void)
+{
+	dss_debugfs_dir = debugfs_create_dir("omapdss", NULL);
+	if (IS_ERR(dss_debugfs_dir)) {
+		int err = PTR_ERR(dss_debugfs_dir);
+
+		dss_debugfs_dir = NULL;
+		return err;
+	}
+
+	debugfs_create_file("clk", S_IRUGO, dss_debugfs_dir,
+			&dss_debug_dump_clocks, &dss_debug_fops);
+
+	return 0;
+}
+
+static void dss_uninitialize_debugfs(void)
+{
+	if (dss_debugfs_dir)
+		debugfs_remove_recursive(dss_debugfs_dir);
+}
+
+int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))
+{
+	struct dentry *d;
+
+	d = debugfs_create_file(name, S_IRUGO, dss_debugfs_dir,
+			write, &dss_debug_fops);
+
+	return PTR_ERR_OR_ZERO(d);
+}
+#else /* CONFIG_OMAP2_DSS_DEBUGFS */
+static inline int dss_initialize_debugfs(void)
+{
+	return 0;
+}
+static inline void dss_uninitialize_debugfs(void)
+{
+}
+#endif /* CONFIG_OMAP2_DSS_DEBUGFS */
 
 static const struct dss_ops dss_ops_omap2_omap3 = {
 	.dpi_select_source = &dss_dpi_select_source_omap2_omap3,
@@ -1334,12 +1396,18 @@ static int dss_probe(struct platform_device *pdev)
 	else
 		dss.feat = of_match_device(dss_of_match, &pdev->dev)->data;
 
+	r = dss_initialize_debugfs();
+	if (r)
+		return r;
+
 	/* add all the child devices as components */
 	device_for_each_child(&pdev->dev, &match, dss_add_child_component);
 
 	r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
-	if (r)
+	if (r) {
+		dss_initialize_debugfs();
 		return r;
+	}
 
 	return 0;
 }
@@ -1347,6 +1415,9 @@ static int dss_probe(struct platform_device *pdev)
 static int dss_remove(struct platform_device *pdev)
 {
 	component_master_del(&pdev->dev, &dss_component_ops);
+
+	dss_uninitialize_debugfs();
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/omapdrm/dss/dss.h b/drivers/gpu/drm/omapdrm/dss/dss.h
index 1ef7c0e75d4c..eca7d731f5c8 100644
--- a/drivers/gpu/drm/omapdrm/dss/dss.h
+++ b/drivers/gpu/drm/omapdrm/dss/dss.h
@@ -236,8 +236,6 @@ static inline int dss_set_min_bus_tput(struct device *dev, unsigned long tput)
 	return 0;
 }
 
-int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *));
-
 static inline bool dss_mgr_is_lcd(enum omap_channel id)
 {
 	if (id == OMAP_DSS_CHANNEL_LCD || id == OMAP_DSS_CHANNEL_LCD2 ||
@@ -248,6 +246,16 @@ static inline bool dss_mgr_is_lcd(enum omap_channel id)
 }
 
 /* DSS */
+#if defined(CONFIG_OMAP2_DSS_DEBUGFS)
+int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *));
+#else
+static inline int dss_debugfs_create_file(const char *name,
+					  void (*write)(struct seq_file *))
+{
+	return 0;
+}
+#endif /* CONFIG_OMAP2_DSS_DEBUGFS */
+
 int dss_init_platform_driver(void) __init;
 void dss_uninit_platform_driver(void);
 
@@ -271,7 +279,6 @@ struct device_node *dss_of_port_get_parent_device(struct device_node *port);
 u32 dss_of_port_get_port_number(struct device_node *port);
 
 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
-void dss_debug_dump_clocks(struct seq_file *s);
 #endif
 
 void dss_ctrl_pll_enable(enum dss_pll_id pll_id, bool enable);
-- 
Regards,

Laurent Pinchart

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