video4linux2: Add MM21 support

This enables mtk-vcodec and MDP driver from mainline Linux kernel.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1567>

diff --git a/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c b/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
index be5276d..442a963 100644 (file)
--- a/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
+++ b/subprojects/gst-plugins-good/sys/v4l2/gstv4l2object.c
@@ -160,6 +160,7 @@ static const GstV4L2FormatDesc gst_v4l2_formats[] = {
   {V4L2_PIX_FMT_NV61M, TRUE, GST_V4L2_RAW},
   {V4L2_PIX_FMT_NV24, TRUE, GST_V4L2_RAW},
   {V4L2_PIX_FMT_NV42, TRUE, GST_V4L2_RAW},
+  {V4L2_PIX_FMT_MM21, TRUE, GST_V4L2_RAW},
 
   /* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */
   {V4L2_PIX_FMT_SBGGR8, TRUE, GST_V4L2_RAW},
@@ -1067,6 +1068,7 @@ gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
     case V4L2_PIX_FMT_NV61:    /* 16  Y/CrCb 4:2:2  */
     case V4L2_PIX_FMT_NV61M:   /* Same as NV61      */
     case V4L2_PIX_FMT_NV24:    /* 24  Y/CrCb 4:4:4  */
+    case V4L2_PIX_FMT_MM21:    /* NV12 Y 16x32, UV 16x16 tile */
       rank = YUV_ODD_BASE_RANK;
       break;
 
@@ -1343,6 +1345,9 @@ gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
     case V4L2_PIX_FMT_NV12MT:
       format = GST_VIDEO_FORMAT_NV12_64Z32;
       break;
+    case V4L2_PIX_FMT_MM21:
+      format = GST_VIDEO_FORMAT_NV12_16L32S;
+      break;
     case V4L2_PIX_FMT_NV21:
     case V4L2_PIX_FMT_NV21M:
       format = GST_VIDEO_FORMAT_NV21;
@@ -1511,6 +1516,7 @@ gst_v4l2_object_v4l2fourcc_to_bare_struct (guint32 fourcc)
     case V4L2_PIX_FMT_NV12:    /* 12  Y/CbCr 4:2:0  */
     case V4L2_PIX_FMT_NV12M:
     case V4L2_PIX_FMT_NV12MT:
+    case V4L2_PIX_FMT_MM21:
     case V4L2_PIX_FMT_NV21:    /* 12  Y/CrCb 4:2:0  */
     case V4L2_PIX_FMT_NV21M:
     case V4L2_PIX_FMT_NV16:    /* 16  Y/CbCr 4:2:2  */
@@ -1791,6 +1797,9 @@ gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
       case GST_VIDEO_FORMAT_NV12_64Z32:
         fourcc_nc = V4L2_PIX_FMT_NV12MT;
         break;
+      case GST_VIDEO_FORMAT_NV12_16L32S:
+        fourcc_nc = V4L2_PIX_FMT_MM21;
+        break;
       case GST_VIDEO_FORMAT_NV21:
         fourcc = V4L2_PIX_FMT_NV21;
         fourcc_nc = V4L2_PIX_FMT_NV21M;
@@ -3172,9 +3181,13 @@ gst_v4l2_object_set_stride (GstVideoInfo * info, GstVideoAlignment * align,
   if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
     gint x_tiles, y_tiles, ws, hs, tile_height, padded_height;
 
-
     ws = GST_VIDEO_FORMAT_INFO_TILE_WS (finfo);
     hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
+
+    /* this only works for what we support, NV12 subsampled tiles */
+    if (GST_VIDEO_FORMAT_INFO_HAS_SUBTILES (finfo) && plane == 1)
+      hs -= 1;
+
     tile_height = 1 << hs;
 
     padded_height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, plane,