V4L/DVB (10089): Add interlace support to sh_mobile_ceu_camera.c

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Acked-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 46 insertions, 10 deletions

diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index 79eda0fed9f9..6750c49f4c04 100644
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -94,6 +94,7 @@ struct sh_mobile_ceu_dev {
         spinlock_t lock;
         struct list_head capture;
         struct videobuf_buffer *active;
+        int is_interlace;
 
         struct sh_mobile_ceu_info *pdata;
 
@@ -163,7 +164,7 @@ static void free_buffer(struct videobuf_queue *vq,
 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 {
         struct soc_camera_device *icd = pcdev->icd;
-        dma_addr_t phys_addr;
+        dma_addr_t phys_addr_top, phys_addr_bottom;
 
         /* The hardware is _very_ picky about this sequence. Especially
          * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
@@ -178,16 +179,24 @@ static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
         if (!pcdev->active)
                 return;
 
-        phys_addr = videobuf_to_dma_contig(pcdev->active);
-        ceu_write(pcdev, CDAYR, phys_addr);
+        phys_addr_top = videobuf_to_dma_contig(pcdev->active);
+        ceu_write(pcdev, CDAYR, phys_addr_top);
+        if (pcdev->is_interlace) {
+                phys_addr_bottom = phys_addr_top + icd->width;
+                ceu_write(pcdev, CDBYR, phys_addr_bottom);
+        }
 
         switch (icd->current_fmt->fourcc) {
         case V4L2_PIX_FMT_NV12:
         case V4L2_PIX_FMT_NV21:
         case V4L2_PIX_FMT_NV16:
         case V4L2_PIX_FMT_NV61:
-                phys_addr += icd->width * icd->height;
-                ceu_write(pcdev, CDACR, phys_addr);
+                phys_addr_top += icd->width * icd->height;
+                ceu_write(pcdev, CDACR, phys_addr_top);
+                if (pcdev->is_interlace) {
+                        phys_addr_bottom = phys_addr_top + icd->width;
+                        ceu_write(pcdev, CDBCR, phys_addr_bottom);
+                }
         }
 
         pcdev->active->state = VIDEOBUF_ACTIVE;
@@ -381,7 +390,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 {
         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
         struct sh_mobile_ceu_dev *pcdev = ici->priv;
-        int ret, buswidth, width, cfszr_width, cdwdr_width;
+        int ret, buswidth, width, height, cfszr_width, cdwdr_width;
         unsigned long camera_flags, common_flags, value;
         int yuv_mode, yuv_lineskip;
 
@@ -448,7 +457,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
         ceu_write(pcdev, CAMCR, value);
 
         ceu_write(pcdev, CAPCR, 0x00300000);
-        ceu_write(pcdev, CAIFR, 0);
+        ceu_write(pcdev, CAIFR, (pcdev->is_interlace) ? 0x101 : 0);
 
         mdelay(1);
 
@@ -463,10 +472,16 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
                 cdwdr_width = buswidth == 16 ? width * 2 : width;
         }
 
+        height = icd->height;
+        if (pcdev->is_interlace) {
+                height /= 2;
+                cdwdr_width *= 2;
+        }
+
         ceu_write(pcdev, CAMOR, 0);
-        ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
+        ceu_write(pcdev, CAPWR, (height << 16) | width);
         ceu_write(pcdev, CFLCR, 0); /* no scaling */
-        ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
+        ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
         ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
 
         /* A few words about byte order (observed in Big Endian mode)
@@ -615,8 +630,10 @@ static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
                                  struct v4l2_format *f)
 {
         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+        struct sh_mobile_ceu_dev *pcdev = ici->priv;
         const struct soc_camera_format_xlate *xlate;
         __u32 pixfmt = f->fmt.pix.pixelformat;
+        int ret;
 
         xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
         if (!xlate) {
@@ -642,7 +659,26 @@ static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
 
         /* limit to sensor capabilities */
-        return icd->ops->try_fmt(icd, f);
+        ret = icd->ops->try_fmt(icd, f);
+        if (ret < 0)
+                return ret;
+
+        switch (f->fmt.pix.field) {
+        case V4L2_FIELD_INTERLACED:
+                pcdev->is_interlace = 1;
+                break;
+        case V4L2_FIELD_ANY:
+                f->fmt.pix.field = V4L2_FIELD_NONE;
+                /* fall-through */
+        case V4L2_FIELD_NONE:
+                pcdev->is_interlace = 0;
+                break;
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        return ret;
 }
 
 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,