From 528096963f4984230cbbbad8fe7d3ccc6904b187 Mon Sep 17 00:00:00 2001
From: Mark Yao <mark.yao@rock-chips.com>
Date: Fri, 30 Dec 2016 17:03:51 +0800
Subject: [PATCH] drm/rockchip: add drm summary debugfs node

With the summary debug node, show current display status would be easier.

Using step:
shell# cat /sys/kernel/debug/dri/0/summary

vop name: ff900000.vop status=active
Display mode: 1200x1920 fps[60] clk[160000] type[8] flag[a]
        H: 1200 1320 1340 1361
        V: 1920 1941 1944 1962
win0-0: status=active
        format: AB24 little-endian (0x34324241)
        zpos: 0
        src: pos[0x0] rect[1200x1920]
        dst: pos[0x0] rect[1200x1920]
        buf[0]: addr: 0x9e19000 pitch: 4800 offset: 0
win1-0: status=disabled
win2-0: status=disabled
win2-0: status=disabled
win2-1: status=disabled
win2-2: status=disabled
win3-0: status=disabled
win3-0: status=disabled
win3-1: status=disabled
win3-2: status=disabled
vop name: ff8f0000.vop status=disabled

Change-Id: I386398b0617f0c18902c4cadad5906be343cc4de
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 48 +++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index b32d625a790d..5ba50d469e4d 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -16,6 +16,7 @@
 #include <linux/console.h>
 #include <linux/iommu.h>
 
+#include <drm/drm_debugfs.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_cma_helper.h>
@@ -133,6 +134,50 @@ static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
 	iommu_domain_free(private->domain);
 }
 
+#ifdef CONFIG_DEBUG_FS
+static int rockchip_drm_summary_show(struct seq_file *s, void *data)
+{
+	struct drm_info_node *node = s->private;
+	struct drm_minor *minor = node->minor;
+	struct drm_device *drm_dev = minor->dev;
+	struct rockchip_drm_private *priv = drm_dev->dev_private;
+	struct drm_crtc *crtc;
+
+	drm_for_each_crtc(crtc, drm_dev) {
+		int pipe = drm_crtc_index(crtc);
+
+		if (priv->crtc_funcs[pipe] &&
+		    priv->crtc_funcs[pipe]->debugfs_dump)
+			priv->crtc_funcs[pipe]->debugfs_dump(crtc, s);
+	}
+
+	return 0;
+}
+
+static struct drm_info_list rockchip_debugfs_files[] = {
+	{ "summary", rockchip_drm_summary_show, 0, NULL },
+};
+
+static void rockchip_drm_debugfs_init(struct drm_minor *minor)
+{
+	struct drm_device *dev = minor->dev;
+	struct rockchip_drm_private *priv = dev->dev_private;
+	struct drm_crtc *crtc;
+
+	drm_debugfs_create_files(rockchip_debugfs_files,
+				 ARRAY_SIZE(rockchip_debugfs_files),
+				 minor->debugfs_root, minor);
+
+	drm_for_each_crtc(crtc, dev) {
+		int pipe = drm_crtc_index(crtc);
+
+		if (priv->crtc_funcs[pipe] &&
+		    priv->crtc_funcs[pipe]->debugfs_init)
+			priv->crtc_funcs[pipe]->debugfs_init(minor, crtc);
+	}
+}
+#endif
+
 static int rockchip_drm_bind(struct device *dev)
 {
 	struct drm_device *drm_dev;
@@ -247,6 +292,9 @@ static struct drm_driver rockchip_drm_driver = {
 	.gem_prime_vmap		= rockchip_gem_prime_vmap,
 	.gem_prime_vunmap	= rockchip_gem_prime_vunmap,
 	.gem_prime_mmap		= rockchip_gem_mmap_buf,
+#ifdef CONFIG_DEBUG_FS
+	.debugfs_init		= rockchip_drm_debugfs_init,
+#endif
 	.fops			= &rockchip_drm_driver_fops,
 	.name	= DRIVER_NAME,
 	.desc	= DRIVER_DESC,