[media] omap3isp: ccdc: Add basic support for interlaced video

When the CCDC input is interlaced enable the alternate field order on
the CCDC output video node. The field signal polarity is specified
through platform data.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Enrico Butera <ebutera@users.sourceforge.net>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/platform/omap3isp/ispccdc.c b/drivers/media/platform/omap3isp/ispccdc.c
index 76d4fd73f5e8e4d8587b8ded0dc6e4ef13ceabbb..49d7256a7de34c6619823bf93e5c84b3745a7e9d 100644 (file)
--- a/drivers/media/platform/omap3isp/ispccdc.c
+++ b/drivers/media/platform/omap3isp/ispccdc.c
@@ -1001,6 +1001,9 @@ static void ccdc_config_sync_if(struct isp_ccdc_device *ccdc,
        if (pdata && pdata->vs_pol)
                syn_mode |= ISPCCDC_SYN_MODE_VDPOL;
 
+       if (pdata && pdata->fld_pol)
+               syn_mode |= ISPCCDC_SYN_MODE_FLDPOL;
+
        isp_reg_writel(isp, syn_mode, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE);
 
        /* The CCDC_CFG.Y8POS bit is used in YCbCr8 input mode only. The
@@ -1140,6 +1143,7 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc)
 
        omap3isp_configure_bridge(isp, ccdc->input, pdata, shift, bridge);
 
+       /* Configure the sync interface. */
        ccdc_config_sync_if(ccdc, pdata, depth_out);
 
        syn_mode = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_SYN_MODE);
@@ -1499,6 +1503,17 @@ static int ccdc_isr_buffer(struct isp_ccdc_device *ccdc)
                return 1;
        }
 
+       /* When capturing fields in alternate order read the current field
+        * identifier and store it in the pipeline.
+        */
+       if (ccdc->formats[CCDC_PAD_SOURCE_OF].field == V4L2_FIELD_ALTERNATE) {
+               u32 syn_mode = isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCDC,
+                                            ISPCCDC_SYN_MODE);
+
+               pipe->field = syn_mode & ISPCCDC_SYN_MODE_FLDSTAT
+                           ? V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP;
+       }
+
        if (ccdc_sbl_wait_idle(ccdc, 1000)) {
                dev_info(isp->dev, "CCDC won't become idle!\n");
                isp->crashed |= 1U << ccdc->subdev.entity.id;
@@ -1830,6 +1845,11 @@ ccdc_try_format(struct isp_ccdc_device *ccdc, struct v4l2_subdev_fh *fh,
                /* Clamp the input size. */
                fmt->width = clamp_t(u32, width, 32, 4096);
                fmt->height = clamp_t(u32, height, 32, 4096);
+
+               /* Default to progressive field order. */
+               if (fmt->field == V4L2_FIELD_ANY)
+                       fmt->field = V4L2_FIELD_NONE;
+
                break;
 
        case CCDC_PAD_SOURCE_OF:
@@ -1885,7 +1905,6 @@ ccdc_try_format(struct isp_ccdc_device *ccdc, struct v4l2_subdev_fh *fh,
         * stored on 2 bytes.
         */
        fmt->colorspace = V4L2_COLORSPACE_SRGB;
-       fmt->field = V4L2_FIELD_NONE;
 }
 
 /*

diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
index 756c1628ef86dd0b46014278b033cf949f3d6b56..c38f1d4cc5381c536108dc5c1a2077167aa526bc 100644 (file)
--- a/drivers/media/platform/omap3isp/ispvideo.c
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -482,6 +482,11 @@ struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
        else
                buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number);
 
+       if (pipe->field != V4L2_FIELD_NONE)
+               buf->vb.v4l2_buf.sequence /= 2;
+
+       buf->vb.v4l2_buf.field = pipe->field;
+
        /* Report pipeline errors to userspace on the capture device side. */
        if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
                state = VB2_BUF_STATE_ERROR;
@@ -1038,6 +1043,7 @@ isp_video_streamon(struct file *file, void *fh, enum v4l2_buf_type type)
        video->queue = &vfh->queue;
        INIT_LIST_HEAD(&video->dmaqueue);
        atomic_set(&pipe->frame_number, -1);
+       pipe->field = vfh->format.fmt.pix.field;
 
        mutex_lock(&video->queue_lock);
        ret = vb2_streamon(&vfh->queue, type);

diff --git a/drivers/media/platform/omap3isp/ispvideo.h b/drivers/media/platform/omap3isp/ispvideo.h
index a76124cd6431afec551148f37ba0b361ccf6f52b..0b7efedc3da990945bddc7e32389b55693df1ab3 100644 (file)
--- a/drivers/media/platform/omap3isp/ispvideo.h
+++ b/drivers/media/platform/omap3isp/ispvideo.h
@@ -78,6 +78,7 @@ enum isp_pipeline_state {
 
 /*
  * struct isp_pipeline - An ISP hardware pipeline
+ * @field: The field being processed by the pipeline
  * @error: A hardware error occurred during capture
  * @entities: Bitmask of entities in the pipeline (indexed by entity ID)
  */
@@ -91,6 +92,7 @@ struct isp_pipeline {
        u32 entities;
        unsigned long l3_ick;
        unsigned int max_rate;
+       enum v4l2_field field;
        atomic_t frame_number;
        bool do_propagation; /* of frame number */
        bool error;

diff --git a/include/media/omap3isp.h b/include/media/omap3isp.h
index c9d06d9f7e6eaa823eb4eb8b286ada0008abc176..398279dd1922b4b41959aa7966b0991d19fbb24b 100644 (file)
--- a/include/media/omap3isp.h
+++ b/include/media/omap3isp.h
@@ -57,6 +57,8 @@ enum {
  *             0 - Active high, 1 - Active low
  * @vs_pol: Vertical synchronization polarity
  *             0 - Active high, 1 - Active low
+ * @fld_pol: Field signal polarity
+ *             0 - Positive, 1 - Negative
  * @data_pol: Data polarity
  *             0 - Normal, 1 - One's complement
  */
@@ -65,6 +67,7 @@ struct isp_parallel_platform_data {
        unsigned int clk_pol:1;
        unsigned int hs_pol:1;
        unsigned int vs_pol:1;
+       unsigned int fld_pol:1;
        unsigned int data_pol:1;
 };