video: omapfb: replace snprintf in show functions with sysfs_emit

coccicheck complains about the use of snprintf() in sysfs show functions.

Fix the coccicheck warning:
WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.
Signed-off-by: Qing Wang <wangqing@vivo.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1634095693-4428-1-git-send-email-wangqing@vivo.com

drivers/video/fbdev/omap2/omapfb/dss/display-sysfs.c

@@ -19,14 +19,14 @@
 
 static ssize_t display_name_show(struct omap_dss_device *dssdev, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%s\n",
+	return sysfs_emit(buf, "%s\n",
 			dssdev->name ?
 			dssdev->name : "");
 }
 
 static ssize_t display_enabled_show(struct omap_dss_device *dssdev, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 			omapdss_device_is_enabled(dssdev));
 }
 
@@ -59,7 +59,7 @@ static ssize_t display_enabled_store(struct omap_dss_device *dssdev,
 
 static ssize_t display_tear_show(struct omap_dss_device *dssdev, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 			dssdev->driver->get_te ?
 			dssdev->driver->get_te(dssdev) : 0);
 }
@@ -93,7 +93,7 @@ static ssize_t display_timings_show(struct omap_dss_device *dssdev, char *buf)
 
 	dssdev->driver->get_timings(dssdev, &t);
 
-	return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
+	return sysfs_emit(buf, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
 			t.pixelclock,
 			t.x_res, t.hfp, t.hbp, t.hsw,
 			t.y_res, t.vfp, t.vbp, t.vsw);
@@ -143,7 +143,7 @@ static ssize_t display_rotate_show(struct omap_dss_device *dssdev, char *buf)
 	if (!dssdev->driver->get_rotate)
 		return -ENOENT;
 	rotate = dssdev->driver->get_rotate(dssdev);
-	return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
+	return sysfs_emit(buf, "%u\n", rotate);
 }
 
 static ssize_t display_rotate_store(struct omap_dss_device *dssdev,
@@ -171,7 +171,7 @@ static ssize_t display_mirror_show(struct omap_dss_device *dssdev, char *buf)
 	if (!dssdev->driver->get_mirror)
 		return -ENOENT;
 	mirror = dssdev->driver->get_mirror(dssdev);
-	return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
+	return sysfs_emit(buf, "%u\n", mirror);
 }
 
 static ssize_t display_mirror_store(struct omap_dss_device *dssdev,
@@ -203,7 +203,7 @@ static ssize_t display_wss_show(struct omap_dss_device *dssdev, char *buf)
 
 	wss = dssdev->driver->get_wss(dssdev);
 
-	return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
+	return sysfs_emit(buf, "0x%05x\n", wss);
 }
 
 static ssize_t display_wss_store(struct omap_dss_device *dssdev,

drivers/video/fbdev/omap2/omapfb/dss/manager-sysfs.c

@@ -22,14 +22,14 @@
 
 static ssize_t manager_name_show(struct omap_overlay_manager *mgr, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%s\n", mgr->name);
+	return sysfs_emit(buf, "%s\n", mgr->name);
 }
 
 static ssize_t manager_display_show(struct omap_overlay_manager *mgr, char *buf)
 {
 	struct omap_dss_device *dssdev = mgr->get_device(mgr);
 
-	return snprintf(buf, PAGE_SIZE, "%s\n", dssdev ?
+	return sysfs_emit(buf, "%s\n", dssdev ?
 			dssdev->name : "<none>");
 }
 
@@ -120,7 +120,7 @@ static ssize_t manager_default_color_show(struct omap_overlay_manager *mgr,
 
 	mgr->get_manager_info(mgr, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%#x\n", info.default_color);
+	return sysfs_emit(buf, "%#x\n", info.default_color);
 }
 
 static ssize_t manager_default_color_store(struct omap_overlay_manager *mgr,
@@ -165,7 +165,7 @@ static ssize_t manager_trans_key_type_show(struct omap_overlay_manager *mgr,
 	key_type = info.trans_key_type;
 	BUG_ON(key_type >= ARRAY_SIZE(trans_key_type_str));
 
-	return snprintf(buf, PAGE_SIZE, "%s\n", trans_key_type_str[key_type]);
+	return sysfs_emit(buf, "%s\n", trans_key_type_str[key_type]);
 }
 
 static ssize_t manager_trans_key_type_store(struct omap_overlay_manager *mgr,
@@ -200,7 +200,7 @@ static ssize_t manager_trans_key_value_show(struct omap_overlay_manager *mgr,
 
 	mgr->get_manager_info(mgr, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%#x\n", info.trans_key);
+	return sysfs_emit(buf, "%#x\n", info.trans_key);
 }
 
 static ssize_t manager_trans_key_value_store(struct omap_overlay_manager *mgr,
@@ -236,7 +236,7 @@ static ssize_t manager_trans_key_enabled_show(struct omap_overlay_manager *mgr,
 
 	mgr->get_manager_info(mgr, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", info.trans_enabled);
+	return sysfs_emit(buf, "%d\n", info.trans_enabled);
 }
 
 static ssize_t manager_trans_key_enabled_store(struct omap_overlay_manager *mgr,
@@ -275,7 +275,7 @@ static ssize_t manager_alpha_blending_enabled_show(
 
 	mgr->get_manager_info(mgr, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 		info.partial_alpha_enabled);
 }
 
@@ -316,7 +316,7 @@ static ssize_t manager_cpr_enable_show(struct omap_overlay_manager *mgr,
 
 	mgr->get_manager_info(mgr, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", info.cpr_enable);
+	return sysfs_emit(buf, "%d\n", info.cpr_enable);
 }
 
 static ssize_t manager_cpr_enable_store(struct omap_overlay_manager *mgr,
@@ -358,7 +358,7 @@ static ssize_t manager_cpr_coef_show(struct omap_overlay_manager *mgr,
 
 	mgr->get_manager_info(mgr, &info);
 
-	return snprintf(buf, PAGE_SIZE,
+	return sysfs_emit(buf,
 			"%d %d %d %d %d %d %d %d %d\n",
 			info.cpr_coefs.rr,
 			info.cpr_coefs.rg,

drivers/video/fbdev/omap2/omapfb/dss/overlay-sysfs.c

@@ -22,12 +22,12 @@
 
 static ssize_t overlay_name_show(struct omap_overlay *ovl, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%s\n", ovl->name);
+	return sysfs_emit(buf, "%s\n", ovl->name);
 }
 
 static ssize_t overlay_manager_show(struct omap_overlay *ovl, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%s\n",
+	return sysfs_emit(buf, "%s\n",
 			ovl->manager ? ovl->manager->name : "<none>");
 }
 
@@ -108,7 +108,7 @@ static ssize_t overlay_input_size_show(struct omap_overlay *ovl, char *buf)
 
 	ovl->get_overlay_info(ovl, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
+	return sysfs_emit(buf, "%d,%d\n",
 			info.width, info.height);
 }
 
@@ -118,7 +118,7 @@ static ssize_t overlay_screen_width_show(struct omap_overlay *ovl, char *buf)
 
 	ovl->get_overlay_info(ovl, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", info.screen_width);
+	return sysfs_emit(buf, "%d\n", info.screen_width);
 }
 
 static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
@@ -127,7 +127,7 @@ static ssize_t overlay_position_show(struct omap_overlay *ovl, char *buf)
 
 	ovl->get_overlay_info(ovl, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
+	return sysfs_emit(buf, "%d,%d\n",
 			info.pos_x, info.pos_y);
 }
 
@@ -166,7 +166,7 @@ static ssize_t overlay_output_size_show(struct omap_overlay *ovl, char *buf)
 
 	ovl->get_overlay_info(ovl, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d,%d\n",
+	return sysfs_emit(buf, "%d,%d\n",
 			info.out_width, info.out_height);
 }
 
@@ -201,7 +201,7 @@ static ssize_t overlay_output_size_store(struct omap_overlay *ovl,
 
 static ssize_t overlay_enabled_show(struct omap_overlay *ovl, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n", ovl->is_enabled(ovl));
+	return sysfs_emit(buf, "%d\n", ovl->is_enabled(ovl));
 }
 
 static ssize_t overlay_enabled_store(struct omap_overlay *ovl, const char *buf,
@@ -231,7 +231,7 @@ static ssize_t overlay_global_alpha_show(struct omap_overlay *ovl, char *buf)
 
 	ovl->get_overlay_info(ovl, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 			info.global_alpha);
 }
 
@@ -273,7 +273,7 @@ static ssize_t overlay_pre_mult_alpha_show(struct omap_overlay *ovl,
 
 	ovl->get_overlay_info(ovl, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 			info.pre_mult_alpha);
 }
 
@@ -314,7 +314,7 @@ static ssize_t overlay_zorder_show(struct omap_overlay *ovl, char *buf)
 
 	ovl->get_overlay_info(ovl, &info);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", info.zorder);
+	return sysfs_emit(buf, "%d\n", info.zorder);
 }
 
 static ssize_t overlay_zorder_store(struct omap_overlay *ovl,

drivers/video/fbdev/omap2/omapfb/omapfb-sysfs.c

@@ -29,7 +29,7 @@ static ssize_t show_rotate_type(struct device *dev,
 	struct fb_info *fbi = dev_get_drvdata(dev);
 	struct omapfb_info *ofbi = FB2OFB(fbi);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", ofbi->rotation_type);
+	return sysfs_emit(buf, "%d\n", ofbi->rotation_type);
 }
 
 static ssize_t store_rotate_type(struct device *dev,
@@ -83,7 +83,7 @@ static ssize_t show_mirror(struct device *dev,
 	struct fb_info *fbi = dev_get_drvdata(dev);
 	struct omapfb_info *ofbi = FB2OFB(fbi);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n", ofbi->mirror);
+	return sysfs_emit(buf, "%d\n", ofbi->mirror);
 }
 
 static ssize_t store_mirror(struct device *dev,
@@ -415,7 +415,7 @@ static ssize_t show_size(struct device *dev,
 	struct fb_info *fbi = dev_get_drvdata(dev);
 	struct omapfb_info *ofbi = FB2OFB(fbi);
 
-	return snprintf(buf, PAGE_SIZE, "%lu\n", ofbi->region->size);
+	return sysfs_emit(buf, "%lu\n", ofbi->region->size);
 }
 
 static ssize_t store_size(struct device *dev, struct device_attribute *attr,
@@ -492,7 +492,7 @@ static ssize_t show_phys(struct device *dev,
 	struct fb_info *fbi = dev_get_drvdata(dev);
 	struct omapfb_info *ofbi = FB2OFB(fbi);
 
-	return snprintf(buf, PAGE_SIZE, "%0x\n", ofbi->region->paddr);
+	return sysfs_emit(buf, "%0x\n", ofbi->region->paddr);
 }
 
 static ssize_t show_virt(struct device *dev,
@@ -501,7 +501,7 @@ static ssize_t show_virt(struct device *dev,
 	struct fb_info *fbi = dev_get_drvdata(dev);
 	struct omapfb_info *ofbi = FB2OFB(fbi);
 
-	return snprintf(buf, PAGE_SIZE, "%p\n", ofbi->region->vaddr);
+	return sysfs_emit(buf, "%p\n", ofbi->region->vaddr);
 }
 
 static ssize_t show_upd_mode(struct device *dev,
@@ -516,7 +516,7 @@ static ssize_t show_upd_mode(struct device *dev,
 	if (r)
 		return r;
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", (unsigned)mode);
+	return sysfs_emit(buf, "%u\n", (unsigned int)mode);
 }
 
 static ssize_t store_upd_mode(struct device *dev, struct device_attribute *attr,