1 files changed, 22 insertions, 3 deletions

diff --git a/drivers/media/video/cx2341x.c b/drivers/media/video/cx2341x.c
index 65f00fc08fa9..657e0b969145 100644
--- a/drivers/media/video/cx2341x.c
+++ b/drivers/media/video/cx2341x.c
@@ -691,7 +691,7 @@ void cx2341x_fill_defaults(struct cx2341x_mpeg_params *p)
         .video_luma_spatial_filter_type = V4L2_MPEG_CX2341X_VIDEO_LUMA_SPATIAL_FILTER_TYPE_1D_HOR,
         .video_chroma_spatial_filter_type = V4L2_MPEG_CX2341X_VIDEO_CHROMA_SPATIAL_FILTER_TYPE_1D_HOR,
         .video_temporal_filter_mode = V4L2_MPEG_CX2341X_VIDEO_TEMPORAL_FILTER_MODE_MANUAL,
-        .video_temporal_filter = 0,
+        .video_temporal_filter = 8,
         .video_median_filter_type = V4L2_MPEG_CX2341X_VIDEO_MEDIAN_FILTER_TYPE_OFF,
         .video_luma_median_filter_top = 255,
         .video_luma_median_filter_bottom = 0,
@@ -731,6 +731,7 @@ int cx2341x_update(void *priv, cx2341x_mbox_func func,
         };
 
         int err = 0;
+        u16 temporal = new->video_temporal_filter;
 
         cx2341x_api(priv, func, CX2341X_ENC_SET_OUTPUT_PORT, 2, new->port, 0);
 
@@ -741,6 +742,7 @@ int cx2341x_update(void *priv, cx2341x_mbox_func func,
 
         if (old == NULL || old->width != new->width || old->height != new->height ||
                         old->video_encoding != new->video_encoding) {
+                int is_scaling;
                 u16 w = new->width;
                 u16 h = new->height;
 
@@ -750,6 +752,20 @@ int cx2341x_update(void *priv, cx2341x_mbox_func func,
                 }
                 err = cx2341x_api(priv, func, CX2341X_ENC_SET_FRAME_SIZE, 2, h, w);
                 if (err) return err;
+
+                /* Adjust temporal filter if necessary. The problem with the temporal
+                   filter is that it works well with full resolution capturing, but
+                   not when the capture window is scaled (the filter introduces
+                   a ghosting effect). So if the capture window changed, and there is
+                   no updated filter value, then the filter is set depending on whether
+                   the new window is full resolution or not.
+
+                   For full resolution a setting of 8 really improves the video
+                   quality, especially if the original video quality is suboptimal. */
+                is_scaling = new->width != 720 || new->height != (new->is_50hz ? 576 : 480);
+                if (old && old->video_temporal_filter == temporal) {
+                        temporal = is_scaling ? 0 : 8;
+                }
         }
 
         if (old == NULL || old->stream_type != new->stream_type) {
@@ -815,9 +831,9 @@ int cx2341x_update(void *priv, cx2341x_mbox_func func,
         }
         if (old == NULL ||
                 old->video_spatial_filter != new->video_spatial_filter ||
-                old->video_temporal_filter != new->video_temporal_filter) {
+                old->video_temporal_filter != temporal) {
                 err = cx2341x_api(priv, func, CX2341X_ENC_SET_DNR_FILTER_PROPS, 2,
-                        new->video_spatial_filter, new->video_temporal_filter);
+                        new->video_spatial_filter, temporal);
                 if (err) return err;
         }
         if (old == NULL || old->video_temporal_decimation != new->video_temporal_decimation) {
@@ -855,6 +871,9 @@ void cx2341x_log_status(struct cx2341x_mpeg_params *p, const char *prefix)
         printk(KERN_INFO "%s: Stream: %s\n",
                 prefix,
                 cx2341x_menu_item(p, V4L2_CID_MPEG_STREAM_TYPE));
+        printk(KERN_INFO "%s: VBI Format: %s\n",
+                prefix,
+                cx2341x_menu_item(p, V4L2_CID_MPEG_STREAM_VBI_FMT));
 
         /* Video */
         printk(KERN_INFO "%s: Video:  %dx%d, %d fps\n",