msm: mdss: Create sysfs node for partial update state

Create a sysfs node for partial update state. This dyn_pu sysfs node will
be used to show whether partial update feature is enabled or not,
so the we can dynamically enable/disable post processing features
accordingly.

Change-Id: I7012e7830575942299ae07c956eb27244e622365
Signed-off-by: Ping Li <pingli@codeaurora.org>

2 files changed, 39 insertions, 0 deletions

diff --git a/drivers/video/fbdev/msm/mdss_mdp.h b/drivers/video/fbdev/msm/mdss_mdp.h
index 4df2d78756af..be42b9a652d4 100644
--- a/drivers/video/fbdev/msm/mdss_mdp.h
+++ b/drivers/video/fbdev/msm/mdss_mdp.h
@@ -505,6 +505,7 @@ struct mdss_overlay_private {
 	struct mdss_mdp_data free_list[MAX_FREE_LIST_SIZE];
 	int free_list_size;
 	int ad_state;
+	int dyn_pu_state;
 
 	bool handoff;
 	u32 splash_mem_addr;
diff --git a/drivers/video/fbdev/msm/mdss_mdp_overlay.c b/drivers/video/fbdev/msm/mdss_mdp_overlay.c
index a416e6cf417d..a17d7bcc047a 100644
--- a/drivers/video/fbdev/msm/mdss_mdp_overlay.c
+++ b/drivers/video/fbdev/msm/mdss_mdp_overlay.c
@@ -2365,14 +2365,51 @@ static ssize_t mdss_mdp_ad_store(struct device *dev,
 	return count;
 }
 
+static ssize_t mdss_mdp_dyn_pu_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct fb_info *fbi = dev_get_drvdata(dev);
+	struct msm_fb_data_type *mfd = fbi->par;
+	struct mdss_overlay_private *mdp5_data = mfd_to_mdp5_data(mfd);
+	int ret, state;
+
+	state = (mdp5_data->dyn_pu_state >= 0) ? mdp5_data->dyn_pu_state : -1;
+
+	ret = scnprintf(buf, PAGE_SIZE, "%d", state);
+
+	return ret;
+}
+
+static ssize_t mdss_mdp_dyn_pu_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct fb_info *fbi = dev_get_drvdata(dev);
+	struct msm_fb_data_type *mfd = fbi->par;
+	struct mdss_overlay_private *mdp5_data = mfd_to_mdp5_data(mfd);
+	int ret, dyn_pu;
+
+	ret = kstrtoint(buf, 10, &dyn_pu);
+	if (ret) {
+		pr_err("Invalid input for partial udpate: ret = %d\n", ret);
+		return ret;
+	}
+
+	mdp5_data->dyn_pu_state = dyn_pu;
+	sysfs_notify(&dev->kobj, NULL, "dyn_pu");
+
+	return count;
+}
 
 static DEVICE_ATTR(vsync_event, S_IRUGO, mdss_mdp_vsync_show_event, NULL);
 static DEVICE_ATTR(ad, S_IRUGO | S_IWUSR | S_IWGRP, mdss_mdp_ad_show,
 	mdss_mdp_ad_store);
+static DEVICE_ATTR(dyn_pu, S_IRUGO | S_IWUSR | S_IWGRP, mdss_mdp_dyn_pu_show,
+	mdss_mdp_dyn_pu_store);
 
 static struct attribute *mdp_overlay_sysfs_attrs[] = {
 	&dev_attr_vsync_event.attr,
 	&dev_attr_ad.attr,
+	&dev_attr_dyn_pu.attr,
 	NULL,
 };
 
@@ -4037,6 +4074,7 @@ int mdss_mdp_overlay_init(struct msm_fb_data_type *mfd)
 			rc = 0;
 		}
 	}
+	mdp5_data->dyn_pu_state = mfd->panel_info->partial_update_enabled;
 
 	if (mdss_mdp_pp_overlay_init(mfd))
 		pr_warn("Failed to initialize pp overlay data.\n");