[PATCH v7 00/11] media: hantro: Add support for H264 decoding

[PATCH v7 00/11] media: hantro: Add support for H264 decoding

[Ezequiel Garcia]

Yet another small respin of H264 uAPI review and Hantro G1 H264
decoding support, addressing some last minute feedback from Hans.

It would be awesome if we can get this first part merged for v5.4.
We have lots of changes and improvements in the pipeline for this
driver!

Thanks,
Ezequiel

Boris Brezillon (3):
  media: uapi: h264: Add the concept of decoding mode
  media: uapi: h264: Get rid of the p0/b0/b1 ref-lists
  media: hantro: Move copy_metadata() before doing a decode operation

Ezequiel Garcia (4):
  media: uapi: h264: Rename pixel format
  media: uapi: h264: Add the concept of start code
  media: cedrus: Cleanup control initialization
  media: cedrus: Specify H264 startcode and decoding mode

Hertz Wong (3):
  media: hantro: Add core bits to support H264 decoding
  media: hantro: Add support for H264 decoding on G1
  media: hantro: Enable H264 decoding on rk3288

Rasmus Villemoes (1):
  lib/sort.c: implement sort() variant taking context argument

 .../media/uapi/v4l/ext-ctrls-codec.rst        |  99 ++-
 .../media/uapi/v4l/pixfmt-compressed.rst      |  11 +-
 drivers/media/v4l2-core/v4l2-ctrls.c          |  18 +
 drivers/media/v4l2-core/v4l2-ioctl.c          |   2 +-
 drivers/staging/media/hantro/Makefile         |   2 +
 drivers/staging/media/hantro/hantro.h         |   9 +-
 drivers/staging/media/hantro/hantro_drv.c     |  50 +-
 .../staging/media/hantro/hantro_g1_h264_dec.c | 292 ++++++++
 drivers/staging/media/hantro/hantro_h264.c    | 646 ++++++++++++++++++
 drivers/staging/media/hantro/hantro_hw.h      |  56 ++
 drivers/staging/media/hantro/hantro_v4l2.c    |  10 +
 drivers/staging/media/hantro/rk3288_vpu_hw.c  |  21 +-
 drivers/staging/media/sunxi/cedrus/cedrus.c   |  63 +-
 drivers/staging/media/sunxi/cedrus/cedrus.h   |   3 +-
 .../staging/media/sunxi/cedrus/cedrus_dec.c   |   2 +-
 .../staging/media/sunxi/cedrus/cedrus_video.c |   6 +-
 include/linux/sort.h                          |   5 +
 include/media/h264-ctrls.h                    |  21 +-
 lib/sort.c                                    |  34 +-
 19 files changed, 1294 insertions(+), 56 deletions(-)
 create mode 100644 drivers/staging/media/hantro/hantro_g1_h264_dec.c
 create mode 100644 drivers/staging/media/hantro/hantro_h264.c

-- 
2.22.0

[PATCH v7 01/11] lib/sort.c: implement sort() variant taking context argument

[Ezequiel Garcia]

From: Rasmus Villemoes <linux@rasmusvillemoes.dk>

Our list_sort() utility has always supported a context argument that
is passed through to the comparison routine. Now there's a use case
for the similar thing for sort().

This implements sort_r by simply extending the existing sort function
in the obvious way. To avoid code duplication, we want to implement
sort() in terms of sort_r(). The naive way to do that is

static int cmp_wrapper(const void *a, const void *b, const void *ctx)
{
  int (*real_cmp)(const void*, const void*) = ctx;
  return real_cmp(a, b);
}

sort(..., cmp) { sort_r(..., cmp_wrapper, cmp) }

but this would do two indirect calls for each comparison. Instead, do
as is done for the default swap functions - that only adds a cost of a
single easily predicted branch to each comparison call.

Aside from introducing support for the context argument, this also
serves as preparation for patches that will eliminate the indirect
comparison calls in common cases.

Requested-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 include/linux/sort.h |  5 +++++
 lib/sort.c           | 34 ++++++++++++++++++++++++++++------
 2 files changed, 33 insertions(+), 6 deletions(-)

diff --git a/include/linux/sort.h b/include/linux/sort.h
index 2b99a5dd073d..61b96d0ebc44 100644
--- a/include/linux/sort.h
+++ b/include/linux/sort.h
@@ -4,6 +4,11 @@
 
 #include <linux/types.h>
 
+void sort_r(void *base, size_t num, size_t size,
+	    int (*cmp)(const void *, const void *, const void *),
+	    void (*swap)(void *, void *, int),
+	    const void *priv);
+
 void sort(void *base, size_t num, size_t size,
 	  int (*cmp)(const void *, const void *),
 	  void (*swap)(void *, void *, int));
diff --git a/lib/sort.c b/lib/sort.c
index cf408aec3733..d54cf97e9548 100644
--- a/lib/sort.c
+++ b/lib/sort.c
@@ -144,6 +144,18 @@ static void do_swap(void *a, void *b, size_t size, swap_func_t swap_func)
 		swap_func(a, b, (int)size);
 }
 
+typedef int (*cmp_func_t)(const void *, const void *);
+typedef int (*cmp_r_func_t)(const void *, const void *, const void *);
+#define _CMP_WRAPPER ((cmp_r_func_t)0L)
+
+static int do_cmp(const void *a, const void *b,
+		  cmp_r_func_t cmp, const void *priv)
+{
+	if (cmp == _CMP_WRAPPER)
+		return ((cmp_func_t)(priv))(a, b);
+	return cmp(a, b, priv);
+}
+
 /**
  * parent - given the offset of the child, find the offset of the parent.
  * @i: the offset of the heap element whose parent is sought.  Non-zero.
@@ -171,12 +183,13 @@ static size_t parent(size_t i, unsigned int lsbit, size_t size)
 }
 
 /**
- * sort - sort an array of elements
+ * sort_r - sort an array of elements
  * @base: pointer to data to sort
  * @num: number of elements
  * @size: size of each element
  * @cmp_func: pointer to comparison function
  * @swap_func: pointer to swap function or NULL
+ * @priv: third argument passed to comparison function
  *
  * This function does a heapsort on the given array.  You may provide
  * a swap_func function if you need to do something more than a memory
@@ -188,9 +201,10 @@ static size_t parent(size_t i, unsigned int lsbit, size_t size)
  * O(n*n) worst-case behavior and extra memory requirements that make
  * it less suitable for kernel use.
  */
-void sort(void *base, size_t num, size_t size,
-	  int (*cmp_func)(const void *, const void *),
-	  void (*swap_func)(void *, void *, int size))
+void sort_r(void *base, size_t num, size_t size,
+	    int (*cmp_func)(const void *, const void *, const void *),
+	    void (*swap_func)(void *, void *, int size),
+	    const void *priv)
 {
 	/* pre-scale counters for performance */
 	size_t n = num * size, a = (num/2) * size;
@@ -238,12 +252,12 @@ void sort(void *base, size_t num, size_t size,
 		 * average, 3/4 worst-case.)
 		 */
 		for (b = a; c = 2*b + size, (d = c + size) < n;)
-			b = cmp_func(base + c, base + d) >= 0 ? c : d;
+			b = do_cmp(base + c, base + d, cmp_func, priv) >= 0 ? c : d;
 		if (d == n)	/* Special case last leaf with no sibling */
 			b = c;
 
 		/* Now backtrack from "b" to the correct location for "a" */
-		while (b != a && cmp_func(base + a, base + b) >= 0)
+		while (b != a && do_cmp(base + a, base + b, cmp_func, priv) >= 0)
 			b = parent(b, lsbit, size);
 		c = b;			/* Where "a" belongs */
 		while (b != a) {	/* Shift it into place */
@@ -252,4 +266,12 @@ void sort(void *base, size_t num, size_t size,
 		}
 	}
 }
+EXPORT_SYMBOL(sort_r);
+
+void sort(void *base, size_t num, size_t size,
+	  int (*cmp_func)(const void *, const void *),
+	  void (*swap_func)(void *, void *, int size))
+{
+	return sort_r(base, num, size, _CMP_WRAPPER, swap_func, cmp_func);
+}
 EXPORT_SYMBOL(sort);
-- 
2.22.0

[PATCH v7 02/11] media: uapi: h264: Rename pixel format

[Ezequiel Garcia]

The V4L2_PIX_FMT_H264_SLICE_RAW name was originally suggested
because the pixel format would represent H264 slices without any
start code.

However, as we will now introduce a start code menu control,
give the pixel format a more meaningful name, while it's
still early enough to do so.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes in v7:
* None.
Changes in v6:
* None.
Changes in v5:
* None.
Changes in v4:
* New patch.
---
 Documentation/media/uapi/v4l/pixfmt-compressed.rst | 4 ++--
 drivers/media/v4l2-core/v4l2-ioctl.c               | 2 +-
 drivers/staging/media/sunxi/cedrus/cedrus_dec.c    | 2 +-
 drivers/staging/media/sunxi/cedrus/cedrus_video.c  | 6 +++---
 include/media/h264-ctrls.h                         | 2 +-
 5 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
index f52a7b67023d..9b65473a2288 100644
--- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
+++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
@@ -52,9 +52,9 @@ Compressed Formats
       - ``V4L2_PIX_FMT_H264_MVC``
       - 'M264'
       - H264 MVC video elementary stream.
-    * .. _V4L2-PIX-FMT-H264-SLICE-RAW:
+    * .. _V4L2-PIX-FMT-H264-SLICE:
 
-      - ``V4L2_PIX_FMT_H264_SLICE_RAW``
+      - ``V4L2_PIX_FMT_H264_SLICE``
       - 'S264'
       - H264 parsed slice data, without the start code and as
 	extracted from the H264 bitstream.  This format is adapted for
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index bb5b4926538a..39f10621c91b 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1343,7 +1343,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
 		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
 		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
-		case V4L2_PIX_FMT_H264_SLICE_RAW:	descr = "H.264 Parsed Slice Data"; break;
+		case V4L2_PIX_FMT_H264_SLICE:	descr = "H.264 Parsed Slice Data"; break;
 		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
 		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
 		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
index bdad87eb9d79..56ca4c9ad01c 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
@@ -46,7 +46,7 @@ void cedrus_device_run(void *priv)
 			V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION);
 		break;
 
-	case V4L2_PIX_FMT_H264_SLICE_RAW:
+	case V4L2_PIX_FMT_H264_SLICE:
 		run.h264.decode_params = cedrus_find_control_data(ctx,
 			V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS);
 		run.h264.pps = cedrus_find_control_data(ctx,
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
index 681dfe3367a6..eeee3efd247b 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
@@ -38,7 +38,7 @@ static struct cedrus_format cedrus_formats[] = {
 		.directions	= CEDRUS_DECODE_SRC,
 	},
 	{
-		.pixelformat	= V4L2_PIX_FMT_H264_SLICE_RAW,
+		.pixelformat	= V4L2_PIX_FMT_H264_SLICE,
 		.directions	= CEDRUS_DECODE_SRC,
 	},
 	{
@@ -104,7 +104,7 @@ static void cedrus_prepare_format(struct v4l2_pix_format *pix_fmt)
 
 	switch (pix_fmt->pixelformat) {
 	case V4L2_PIX_FMT_MPEG2_SLICE:
-	case V4L2_PIX_FMT_H264_SLICE_RAW:
+	case V4L2_PIX_FMT_H264_SLICE:
 		/* Zero bytes per line for encoded source. */
 		bytesperline = 0;
 
@@ -449,7 +449,7 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count)
 		ctx->current_codec = CEDRUS_CODEC_MPEG2;
 		break;
 
-	case V4L2_PIX_FMT_H264_SLICE_RAW:
+	case V4L2_PIX_FMT_H264_SLICE:
 		ctx->current_codec = CEDRUS_CODEC_H264;
 		break;
 
diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
index e1404d78d6ff..6160a69c0143 100644
--- a/include/media/h264-ctrls.h
+++ b/include/media/h264-ctrls.h
@@ -14,7 +14,7 @@
 #include <linux/videodev2.h>
 
 /* Our pixel format isn't stable at the moment */
-#define V4L2_PIX_FMT_H264_SLICE_RAW v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
+#define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
 
 /*
  * This is put insanely high to avoid conflicting with controls that
-- 
2.22.0

[PATCH v7 03/11] media: uapi: h264: Add the concept of decoding mode

[Ezequiel Garcia]

From: Boris Brezillon <boris.brezillon@collabora.com>

Some stateless decoders don't support per-slice decoding granularity
(or at least not in a way that would make them efficient or easy to use).

Expose a menu to control the supported decoding modes. Drivers are
allowed to support only one decoding but they can support both too.

To fully specify the decoding operation, we need to introduce
a start_byte_offset, to indicate where slices start.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes in v7:
* Further specify start_byte_offset in slice- and frame-based
  decoding modes.
Changes in v6:
* Fix spec, specifiying the decode-mode pixelformat modifier
  needs to be set once, as suggested by Hans.
* Rename, as suggested by Paul.
Changes in v5:
* Improve specification as suggested by Hans.
Changes in v4:
* Typos/rewording fixes
Changes in v3:
* s/per-{slice,frame} decoding/{slice,frame}-based decoding/
* Add Paul's R-b
Changes in v2:
* Allow decoding multiple slices in per-slice decoding mode
* Minor doc improvement/fixes

doc api ext-ctrls-codec

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
 .../media/uapi/v4l/ext-ctrls-codec.rst        | 57 ++++++++++++++++++-
 .../media/uapi/v4l/pixfmt-compressed.rst      |  6 +-
 drivers/media/v4l2-core/v4l2-ctrls.c          |  9 +++
 include/media/h264-ctrls.h                    | 10 ++++
 4 files changed, 79 insertions(+), 3 deletions(-)

diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index c5f39dd50043..7e7447d9998c 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -1747,6 +1747,14 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
     * - __u32
       - ``size``
       -
+    * - __u32
+      - ``start_byte_offset``
+        Offset (in bytes) from the beginning of the OUTPUT buffer to the start
+        of the slice. If the slice starts with a start code, then this is the
+        offset to such start code. When operating in slice-based decoding mode
+        (see :c:type:`v4l2_mpeg_video_h264_decode_mode`), this field should
+        be set to 0. When operating in frame-based decoding mode, this field
+        should be 0, for the first slice.
     * - __u32
       - ``header_bit_size``
       -
@@ -1930,7 +1938,10 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
       -
     * - __u16
       - ``num_slices``
-      - Number of slices needed to decode the current frame
+      - Number of slices needed to decode the current frame/field. When
+        operating in slice-based decoding mode (see
+        :c:type:`v4l2_mpeg_video_h264_decode_mode`), this field
+        should always be set to one.
     * - __u16
       - ``nal_ref_idc``
       - NAL reference ID value coming from the NAL Unit header
@@ -2021,6 +2032,50 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
       - 0x00000004
       - The DPB entry is a long term reference frame
 
+``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE (enum)``
+    Specifies the decoding mode to use. Currently exposes slice-based and
+    frame-based decoding but new modes might be added later on.
+    This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
+    pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
+    are required to set this control in order to specify the decoding mode
+    that is expected for the buffer.
+    Drivers may expose a single or multiple decoding modes, depending
+    on what they can support.
+
+    .. note::
+
+       This menu control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_mpeg_video_h264_decode_mode
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED``
+      - 0
+      - Decoding is done at the slice granularity.
+        In this mode, ``num_slices`` field in struct
+        :c:type:`v4l2_ctrl_h264_decode_params` should be set to 1,
+        and ``start_byte_offset`` in struct
+        :c:type:`v4l2_ctrl_h264_slice_params` should be set to 0.
+        The OUTPUT buffer must contain a single slice.
+    * - ``V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED``
+      - 1
+      - Decoding is done at the frame granularity.
+        In this mode, ``num_slices`` field in struct
+        :c:type:`v4l2_ctrl_h264_decode_params` should be set to the number
+        of slices in the frame, and ``start_byte_offset`` in struct
+        :c:type:`v4l2_ctrl_h264_slice_params` should be set accordingly
+        for each slice. For the first slice, ``start_byte_offset`` should
+        be zero.
+        The OUTPUT buffer must contain all slices needed to decode the
+        frame. The OUTPUT buffer must also contain both fields.
+
 .. _v4l2-mpeg-mpeg2:
 
 ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)``
diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
index 9b65473a2288..d666eb51741a 100644
--- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
+++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
@@ -60,8 +60,10 @@ Compressed Formats
 	extracted from the H264 bitstream.  This format is adapted for
 	stateless video decoders that implement an H264 pipeline
 	(using the :ref:`mem2mem` and :ref:`media-request-api`).
-	Metadata associated with the frame to decode are required to
-	be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``,
+	This pixelformat has a modifier that must be set at least once
+	through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE`` control.
+	In addition, metadata associated with the frame to decode are
+	required to be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``,
 	``V4L2_CID_MPEG_VIDEO_H264_PPS``,
 	``V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX``,
 	``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS`` and
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index cd1ae016706f..2c67f9fc4d5b 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -402,6 +402,11 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
 		"Explicit",
 		NULL,
 	};
+	static const char * const h264_decode_mode[] = {
+		"Slice-Based",
+		"Frame-Based",
+		NULL,
+	};
 	static const char * const mpeg_mpeg2_level[] = {
 		"Low",
 		"Main",
@@ -633,6 +638,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
 		return h264_fp_arrangement_type;
 	case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
 		return h264_fmo_map_type;
+	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:
+		return h264_decode_mode;
 	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
 		return mpeg_mpeg2_level;
 	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
@@ -852,6 +859,7 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX:		return "H264 Scaling Matrix";
 	case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS:		return "H264 Slice Parameters";
 	case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS:		return "H264 Decode Parameters";
+	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:		return "H264 Decode Mode";
 	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:			return "MPEG2 Level";
 	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:			return "MPEG2 Profile";
 	case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:		return "MPEG4 I-Frame QP Value";
@@ -1220,6 +1228,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
 	case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
 	case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
+	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:
 	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
 	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
 	case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
index 6160a69c0143..928c48c57282 100644
--- a/include/media/h264-ctrls.h
+++ b/include/media/h264-ctrls.h
@@ -26,6 +26,7 @@
 #define V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX	(V4L2_CID_MPEG_BASE+1002)
 #define V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS	(V4L2_CID_MPEG_BASE+1003)
 #define V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS	(V4L2_CID_MPEG_BASE+1004)
+#define V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE	(V4L2_CID_MPEG_BASE+1005)
 
 /* enum v4l2_ctrl_type type values */
 #define V4L2_CTRL_TYPE_H264_SPS			0x0110
@@ -34,6 +35,11 @@
 #define V4L2_CTRL_TYPE_H264_SLICE_PARAMS	0x0113
 #define V4L2_CTRL_TYPE_H264_DECODE_PARAMS	0x0114
 
+enum v4l2_mpeg_video_h264_decode_mode {
+	V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED,
+	V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
+};
+
 #define V4L2_H264_SPS_CONSTRAINT_SET0_FLAG			0x01
 #define V4L2_H264_SPS_CONSTRAINT_SET1_FLAG			0x02
 #define V4L2_H264_SPS_CONSTRAINT_SET2_FLAG			0x04
@@ -125,6 +131,10 @@ struct v4l2_h264_pred_weight_table {
 struct v4l2_ctrl_h264_slice_params {
 	/* Size in bytes, including header */
 	__u32 size;
+
+	/* Offset in bytes to the start of slice in the OUTPUT buffer. */
+	__u32 start_byte_offset;
+
 	/* Offset in bits to slice_data() from the beginning of this slice. */
 	__u32 header_bit_size;
 
-- 
2.22.0

[PATCH v7 04/11] media: uapi: h264: Add the concept of start code

[Ezequiel Garcia]

Stateless decoders have different expectations about the
start code that is prepended on H264 slices. Add a
menu control to express the supported start code types
(including no start code).

Drivers are allowed to support only one start code type,
but they can support both too.

Note that this is independent of the H264 decoding mode,
which specifies the granularity of the decoding operations.
Either in frame-based or slice-based mode, this new control
will allow to define the start code expected on H264 slices.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes in v7:
* None.
Changes in v6:
* Rename to START_CODE and enum values
  as suggested by Hand and Paul.
Changes in v5:
* Improve specification as suggested by Hans.
Changes in v4:
* New patch.
---
 .../media/uapi/v4l/ext-ctrls-codec.rst        | 33 +++++++++++++++++++
 .../media/uapi/v4l/pixfmt-compressed.rst      |  5 +--
 drivers/media/v4l2-core/v4l2-ctrls.c          |  9 +++++
 include/media/h264-ctrls.h                    |  6 ++++
 4 files changed, 51 insertions(+), 2 deletions(-)

diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index 7e7447d9998c..3703c705286f 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -2076,6 +2076,39 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
         The OUTPUT buffer must contain all slices needed to decode the
         frame. The OUTPUT buffer must also contain both fields.
 
+``V4L2_CID_MPEG_VIDEO_H264_START_CODE (enum)``
+    Specifies the H264 slice start code expected for each slice.
+    This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
+    pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
+    are required to set this control in order to specify the start code
+    that is expected for the buffer.
+    Drivers may expose a single or multiple start codes, depending
+    on what they can support.
+
+    .. note::
+
+       This menu control is not yet part of the public kernel API and
+       it is expected to change.
+
+.. c:type:: v4l2_mpeg_video_h264_start_code
+
+.. cssclass:: longtable
+
+.. flat-table::
+    :header-rows:  0
+    :stub-columns: 0
+    :widths:       1 1 2
+
+    * - ``V4L2_MPEG_VIDEO_H264_START_CODE_NONE``
+      - 0
+      - Selecting this value specifies that H264 slices are passed
+        to the driver without any start code.
+    * - ``V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B``
+      - 1
+      - Selecting this value specifies that H264 slices are expected
+        to be prefixed by Annex B start codes. According to :ref:`h264`
+        valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
+
 .. _v4l2-mpeg-mpeg2:
 
 ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)``
diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
index d666eb51741a..493b6020107d 100644
--- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
+++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
@@ -60,8 +60,9 @@ Compressed Formats
 	extracted from the H264 bitstream.  This format is adapted for
 	stateless video decoders that implement an H264 pipeline
 	(using the :ref:`mem2mem` and :ref:`media-request-api`).
-	This pixelformat has a modifier that must be set at least once
-	through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE`` control.
+	This pixelformat has two modifiers that must be set at least once
+	through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE``
+        and ``V4L2_CID_MPEG_VIDEO_H264_START_CODE`` controls.
 	In addition, metadata associated with the frame to decode are
 	required to be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``,
 	``V4L2_CID_MPEG_VIDEO_H264_PPS``,
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 2c67f9fc4d5b..1d8f38824631 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -407,6 +407,11 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
 		"Frame-Based",
 		NULL,
 	};
+	static const char * const h264_start_code[] = {
+		"No Start Code",
+		"Annex B Start Code",
+		NULL,
+	};
 	static const char * const mpeg_mpeg2_level[] = {
 		"Low",
 		"Main",
@@ -640,6 +645,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
 		return h264_fmo_map_type;
 	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:
 		return h264_decode_mode;
+	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:
+		return h264_start_code;
 	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
 		return mpeg_mpeg2_level;
 	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
@@ -860,6 +867,7 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS:		return "H264 Slice Parameters";
 	case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS:		return "H264 Decode Parameters";
 	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:		return "H264 Decode Mode";
+	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:		return "H264 Start Code";
 	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:			return "MPEG2 Level";
 	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:			return "MPEG2 Profile";
 	case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:		return "MPEG4 I-Frame QP Value";
@@ -1229,6 +1237,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
 	case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
 	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:
+	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:
 	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
 	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
 	case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
index 928c48c57282..ba2876a64cf6 100644
--- a/include/media/h264-ctrls.h
+++ b/include/media/h264-ctrls.h
@@ -27,6 +27,7 @@
 #define V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS	(V4L2_CID_MPEG_BASE+1003)
 #define V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS	(V4L2_CID_MPEG_BASE+1004)
 #define V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE	(V4L2_CID_MPEG_BASE+1005)
+#define V4L2_CID_MPEG_VIDEO_H264_START_CODE	(V4L2_CID_MPEG_BASE+1006)
 
 /* enum v4l2_ctrl_type type values */
 #define V4L2_CTRL_TYPE_H264_SPS			0x0110
@@ -40,6 +41,11 @@ enum v4l2_mpeg_video_h264_decode_mode {
 	V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
 };
 
+enum v4l2_mpeg_video_h264_start_code {
+	V4L2_MPEG_VIDEO_H264_START_CODE_NONE,
+	V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
+};
+
 #define V4L2_H264_SPS_CONSTRAINT_SET0_FLAG			0x01
 #define V4L2_H264_SPS_CONSTRAINT_SET1_FLAG			0x02
 #define V4L2_H264_SPS_CONSTRAINT_SET2_FLAG			0x04
-- 
2.22.0

[PATCH v7 05/11] media: uapi: h264: Get rid of the p0/b0/b1 ref-lists

[Ezequiel Garcia]

From: Boris Brezillon <boris.brezillon@collabora.com>

Those lists can be extracted from the dpb, let's simplify userspace
life and build that list kernel-side (generic helpers will be provided
for drivers that need this list).

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes in v7:
* None.
Changes in v6:
* None.
Changes in v5:
* None.
Changes in v4:
* Add R-b
* Remove the reflist from the struct
Changes in v3:
* None
Changes in v2:
* None
---
 Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 9 ---------
 include/media/h264-ctrls.h                       | 3 ---
 2 files changed, 12 deletions(-)

diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index 3703c705286f..94aea8fb1999 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -1945,15 +1945,6 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
     * - __u16
       - ``nal_ref_idc``
       - NAL reference ID value coming from the NAL Unit header
-    * - __u8
-      - ``ref_pic_list_p0[32]``
-      - Backward reference list used by P-frames in the original bitstream order
-    * - __u8
-      - ``ref_pic_list_b0[32]``
-      - Backward reference list used by B-frames in the original bitstream order
-    * - __u8
-      - ``ref_pic_list_b1[32]``
-      - Forward reference list used by B-frames in the original bitstream order
     * - __s32
       - ``top_field_order_cnt``
       - Picture Order Count for the coded top field
diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
index ba2876a64cf6..e877bf1d537c 100644
--- a/include/media/h264-ctrls.h
+++ b/include/media/h264-ctrls.h
@@ -202,9 +202,6 @@ struct v4l2_ctrl_h264_decode_params {
 	struct v4l2_h264_dpb_entry dpb[16];
 	__u16 num_slices;
 	__u16 nal_ref_idc;
-	__u8 ref_pic_list_p0[32];
-	__u8 ref_pic_list_b0[32];
-	__u8 ref_pic_list_b1[32];
 	__s32 top_field_order_cnt;
 	__s32 bottom_field_order_cnt;
 	__u32 flags; /* V4L2_H264_DECODE_PARAM_FLAG_* */
-- 
2.22.0

[PATCH v7 06/11] media: cedrus: Cleanup control initialization

[Ezequiel Garcia]

In order to introduce other controls, the control initialization
needs to support an initial struct v4l2_ctrl_control.

While here, let's cleanup the control initialization,
removing unneeded fields.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
Changes in v7:
* None.
Changes in v6:
* None.
Changes in v5:
* None.
Changes in v4:
* New patch.
---
 drivers/staging/media/sunxi/cedrus/cedrus.c | 45 +++++++++++----------
 drivers/staging/media/sunxi/cedrus/cedrus.h |  3 +-
 2 files changed, 25 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
index 370937edfc14..7bdc413bf727 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
@@ -29,44 +29,51 @@
 
 static const struct cedrus_control cedrus_controls[] = {
 	{
-		.id		= V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
-		.elem_size	= sizeof(struct v4l2_ctrl_mpeg2_slice_params),
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
+		},
 		.codec		= CEDRUS_CODEC_MPEG2,
 		.required	= true,
 	},
 	{
-		.id		= V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION,
-		.elem_size	= sizeof(struct v4l2_ctrl_mpeg2_quantization),
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION,
+		},
 		.codec		= CEDRUS_CODEC_MPEG2,
 		.required	= false,
 	},
 	{
-		.id		= V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_decode_params),
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS,
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
 	{
-		.id		= V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_slice_params),
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS,
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
 	{
-		.id		= V4L2_CID_MPEG_VIDEO_H264_SPS,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_sps),
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_H264_SPS,
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
 	{
-		.id		= V4L2_CID_MPEG_VIDEO_H264_PPS,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_pps),
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_H264_PPS,
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
 	{
-		.id		= V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX,
-		.elem_size	= sizeof(struct v4l2_ctrl_h264_scaling_matrix),
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX,
+		},
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
@@ -106,12 +113,8 @@ static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx)
 		return -ENOMEM;
 
 	for (i = 0; i < CEDRUS_CONTROLS_COUNT; i++) {
-		struct v4l2_ctrl_config cfg = {};
-
-		cfg.elem_size = cedrus_controls[i].elem_size;
-		cfg.id = cedrus_controls[i].id;
-
-		ctrl = v4l2_ctrl_new_custom(hdl, &cfg, NULL);
+		ctrl = v4l2_ctrl_new_custom(hdl, &cedrus_controls[i].cfg,
+					    NULL);
 		if (hdl->error) {
 			v4l2_err(&dev->v4l2_dev,
 				 "Failed to create new custom control\n");
@@ -178,7 +181,7 @@ static int cedrus_request_validate(struct media_request *req)
 			continue;
 
 		ctrl_test = v4l2_ctrl_request_hdl_ctrl_find(hdl,
-							    cedrus_controls[i].id);
+							    cedrus_controls[i].cfg.id);
 		if (!ctrl_test) {
 			v4l2_info(&ctx->dev->v4l2_dev,
 				  "Missing required codec control\n");
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.h b/drivers/staging/media/sunxi/cedrus/cedrus.h
index d8e6777e5e27..2f017a651848 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus.h
+++ b/drivers/staging/media/sunxi/cedrus/cedrus.h
@@ -49,8 +49,7 @@ enum cedrus_h264_pic_type {
 };
 
 struct cedrus_control {
-	u32			id;
-	u32			elem_size;
+	struct v4l2_ctrl_config cfg;
 	enum cedrus_codec	codec;
 	unsigned char		required:1;
 };
-- 
2.22.0

[PATCH v7 07/11] media: cedrus: Specify H264 startcode and decoding mode

[Ezequiel Garcia]

The cedrus VPU is slice-based and expects V4L2_PIX_FMT_H264_SLICE
buffers to contain H264 slices with no start code.

Expose this to userspace with the newly added menu control.

These two controls are specified as mandatory for applications,
but we mark them as non-required on the driver side for
backwards compatibility.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
Changes in v7:
* None.
Changes in v6:
* Remove incorrect menu_skip_mask.
Changes in v6:
* Adjust to control renames.
Changes in v5:
* Clarify commit log.
Changes in v4:
* New patch.
---
 drivers/staging/media/sunxi/cedrus/cedrus.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
index 7bdc413bf727..2d3ea8b74dfd 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
@@ -77,6 +77,24 @@ static const struct cedrus_control cedrus_controls[] = {
 		.codec		= CEDRUS_CODEC_H264,
 		.required	= true,
 	},
+	{
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE,
+			.max	= V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED,
+			.def	= V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED,
+		},
+		.codec		= CEDRUS_CODEC_H264,
+		.required	= false,
+	},
+	{
+		.cfg = {
+			.id	= V4L2_CID_MPEG_VIDEO_H264_START_CODE,
+			.max	= V4L2_MPEG_VIDEO_H264_START_CODE_NONE,
+			.def	= V4L2_MPEG_VIDEO_H264_START_CODE_NONE,
+		},
+		.codec		= CEDRUS_CODEC_H264,
+		.required	= false,
+	},
 };
 
 #define CEDRUS_CONTROLS_COUNT	ARRAY_SIZE(cedrus_controls)
-- 
2.22.0

[PATCH v7 08/11] media: hantro: Move copy_metadata() before doing a decode operation

[Ezequiel Garcia]

From: Boris Brezillon <boris.brezillon@collabora.com>

Some decoders use intra slice/frame references. The capture buffer
pointed by these references might be new and thus have invalid
timestamp which prevents the decoder logic from retrieving the
vb2_buffer object based on the output buf timestamp.
Copy all metadata (including the timestamp) before starting the decode
operation.

Suggested-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes in v7:
* None.
Changes in v6:
* None.
Changes in v5:
* None.
Changes in v4:
* None.
---
 drivers/staging/media/hantro/hantro_drv.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
index 4af6ee80229e..6e2351e46750 100644
--- a/drivers/staging/media/hantro/hantro_drv.c
+++ b/drivers/staging/media/hantro/hantro_drv.c
@@ -111,8 +111,6 @@ static void hantro_job_finish(struct hantro_dev *vpu,
 	src->sequence = ctx->sequence_out++;
 	dst->sequence = ctx->sequence_cap++;
 
-	v4l2_m2m_buf_copy_metadata(src, dst, true);
-
 	ret = ctx->buf_finish(ctx, &dst->vb2_buf, bytesused);
 	if (ret)
 		result = VB2_BUF_STATE_ERROR;
@@ -178,8 +176,12 @@ void hantro_finish_run(struct hantro_ctx *ctx)
 static void device_run(void *priv)
 {
 	struct hantro_ctx *ctx = priv;
+	struct vb2_v4l2_buffer *src, *dst;
 	int ret;
 
+	src = hantro_get_src_buf(ctx);
+	dst = hantro_get_dst_buf(ctx);
+
 	ret = clk_bulk_enable(ctx->dev->variant->num_clocks, ctx->dev->clocks);
 	if (ret)
 		goto err_cancel_job;
@@ -187,6 +189,8 @@ static void device_run(void *priv)
 	if (ret < 0)
 		goto err_cancel_job;
 
+	v4l2_m2m_buf_copy_metadata(src, dst, true);
+
 	ctx->codec_ops->run(ctx);
 	return;
 
-- 
2.22.0

[PATCH v7 09/11] media: hantro: Add core bits to support H264 decoding

[Ezequiel Garcia]

From: Hertz Wong <hertz.wong@rock-chips.com>

Add helpers and patch hantro_{drv,v4l2}.c to prepare addition of H264
decoding support.

Signed-off-by: Hertz Wong <hertz.wong@rock-chips.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes in v7:
* Comment on the source of the CABAC constant table.
* Remove unneeded menu_skip_mask.
Changes in v6:
* Fixed duplicated CABAC table memcpy.
* Adjust to renamed controls.
Changes in v5:
* None.
Changes in v4:
* Rework extra_size0, exposing the size via TRY_FMT/S_FMT
  to allow buffer importation, as suggested by Tomasz.
* Drop max slice limit.
* Use a ternary operator instead of substracting POCs,
  to avoid an overflow as pointed out by Rasmus.
* Specify annex B slice start code.
* Add missing extra_size0 to sizeimage
* Swap the first 2 entries of list B1 when B0 and B1 match (mandated by
  the spec)
* Move the update_dpb() call before the prepare_table() one to make the
  POCs stored in the private table match the content of the new DPB
---
 drivers/staging/media/hantro/Makefile      |   1 +
 drivers/staging/media/hantro/hantro.h      |   9 +-
 drivers/staging/media/hantro/hantro_drv.c  |  42 ++
 drivers/staging/media/hantro/hantro_h264.c | 646 +++++++++++++++++++++
 drivers/staging/media/hantro/hantro_hw.h   |  55 ++
 drivers/staging/media/hantro/hantro_v4l2.c |  10 +
 6 files changed, 762 insertions(+), 1 deletion(-)
 create mode 100644 drivers/staging/media/hantro/hantro_h264.c

diff --git a/drivers/staging/media/hantro/Makefile b/drivers/staging/media/hantro/Makefile
index f5ec597d9e08..0f0d3afb1cca 100644
--- a/drivers/staging/media/hantro/Makefile
+++ b/drivers/staging/media/hantro/Makefile
@@ -10,6 +10,7 @@ hantro-vpu-y += \
 		rk3399_vpu_hw_mpeg2_dec.o \
 		rk3399_vpu_hw_vp8_dec.o \
 		hantro_jpeg.o \
+		hantro_h264.o \
 		hantro_mpeg2.o \
 		hantro_vp8.o
 
diff --git a/drivers/staging/media/hantro/hantro.h b/drivers/staging/media/hantro/hantro.h
index c4c86c32ea2d..f670bbde4159 100644
--- a/drivers/staging/media/hantro/hantro.h
+++ b/drivers/staging/media/hantro/hantro.h
@@ -30,6 +30,10 @@
 #define VP8_MB_WIDTH(w)			DIV_ROUND_UP(w, VP8_MB_DIM)
 #define VP8_MB_HEIGHT(h)		DIV_ROUND_UP(h, VP8_MB_DIM)
 
+#define H264_MB_DIM			16
+#define H264_MB_WIDTH(w)		DIV_ROUND_UP(w, H264_MB_DIM)
+#define H264_MB_HEIGHT(h)		DIV_ROUND_UP(h, H264_MB_DIM)
+
 #define MPEG2_MB_DIM			16
 #define MPEG2_MB_WIDTH(w)		DIV_ROUND_UP(w, MPEG2_MB_DIM)
 #define MPEG2_MB_HEIGHT(h)		DIV_ROUND_UP(h, MPEG2_MB_DIM)
@@ -43,9 +47,9 @@ struct hantro_codec_ops;
 
 #define HANTRO_JPEG_ENCODER	BIT(0)
 #define HANTRO_ENCODERS		0x0000ffff
-
 #define HANTRO_MPEG2_DECODER	BIT(16)
 #define HANTRO_VP8_DECODER	BIT(17)
+#define HANTRO_H264_DECODER	BIT(18)
 #define HANTRO_DECODERS		0xffff0000
 
 /**
@@ -102,12 +106,14 @@ struct hantro_variant {
  * enum hantro_codec_mode - codec operating mode.
  * @HANTRO_MODE_NONE:  No operating mode. Used for RAW video formats.
  * @HANTRO_MODE_JPEG_ENC: JPEG encoder.
+ * @HANTRO_MODE_H264_DEC: H264 decoder.
  * @HANTRO_MODE_MPEG2_DEC: MPEG-2 decoder.
  * @HANTRO_MODE_VP8_DEC: VP8 decoder.
  */
 enum hantro_codec_mode {
 	HANTRO_MODE_NONE = -1,
 	HANTRO_MODE_JPEG_ENC,
+	HANTRO_MODE_H264_DEC,
 	HANTRO_MODE_MPEG2_DEC,
 	HANTRO_MODE_VP8_DEC,
 };
@@ -246,6 +252,7 @@ struct hantro_ctx {
 
 	/* Specific for particular codec modes. */
 	union {
+		struct hantro_h264_dec_hw_ctx h264_dec;
 		struct hantro_jpeg_enc_hw_ctx jpeg_enc;
 		struct hantro_mpeg2_dec_hw_ctx mpeg2_dec;
 		struct hantro_vp8_dec_hw_ctx vp8_dec;
diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
index 6e2351e46750..d8b6816b643b 100644
--- a/drivers/staging/media/hantro/hantro_drv.c
+++ b/drivers/staging/media/hantro/hantro_drv.c
@@ -314,6 +314,48 @@ static const struct hantro_ctrl controls[] = {
 		.cfg = {
 			.id = V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER,
 		},
+	}, {
+		.codec = HANTRO_H264_DECODER,
+		.cfg = {
+			.id = V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS,
+		},
+	}, {
+		.codec = HANTRO_H264_DECODER,
+		.cfg = {
+			.id = V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS,
+		},
+	}, {
+		.codec = HANTRO_H264_DECODER,
+		.cfg = {
+			.id = V4L2_CID_MPEG_VIDEO_H264_SPS,
+		},
+	}, {
+		.codec = HANTRO_H264_DECODER,
+		.cfg = {
+			.id = V4L2_CID_MPEG_VIDEO_H264_PPS,
+		},
+	}, {
+		.codec = HANTRO_H264_DECODER,
+		.cfg = {
+			.id = V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX,
+		},
+	}, {
+		.codec = HANTRO_H264_DECODER,
+		.cfg = {
+			.id = V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE,
+			.min = V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
+			.def = V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
+			.max = V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
+		},
+	}, {
+		.codec = HANTRO_H264_DECODER,
+		.cfg = {
+			.id = V4L2_CID_MPEG_VIDEO_H264_START_CODE,
+			.min = V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
+			.def = V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
+			.max = V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
+		},
+	}, {
 	},
 };
 
diff --git a/drivers/staging/media/hantro/hantro_h264.c b/drivers/staging/media/hantro/hantro_h264.c
new file mode 100644
index 000000000000..0d758e0c0f99
--- /dev/null
+++ b/drivers/staging/media/hantro/hantro_h264.c
@@ -0,0 +1,646 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Rockchip RK3288 VPU codec driver
+ *
+ * Copyright (c) 2014 Rockchip Electronics Co., Ltd.
+ *	Hertz Wong <hertz.wong@rock-chips.com>
+ *	Herman Chen <herman.chen@rock-chips.com>
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *	Tomasz Figa <tfiga@chromium.org>
+ */
+
+#include <linux/types.h>
+#include <linux/sort.h>
+#include <media/v4l2-mem2mem.h>
+
+#include "hantro.h"
+#include "hantro_hw.h"
+
+/* Size with u32 units. */
+#define CABAC_INIT_BUFFER_SIZE		(460 * 2)
+#define POC_BUFFER_SIZE			34
+#define SCALING_LIST_SIZE		(6 * 16 + 6 * 64)
+
+#define POC_CMP(p0, p1) ((p0) < (p1) ? -1 : 1)
+
+/* Data structure describing auxiliary buffer format. */
+struct hantro_h264_dec_priv_tbl {
+	u32 cabac_table[CABAC_INIT_BUFFER_SIZE];
+	u32 poc[POC_BUFFER_SIZE];
+	u8 scaling_list[SCALING_LIST_SIZE];
+};
+
+/*
+ * Constant CABAC table.
+ * From drivers/media/platform/rk3288-vpu/rk3288_vpu_hw_h264d.c
+ * in https://chromium.googlesource.com/chromiumos/third_party/kernel,
+ * chromeos-3.14 branch.
+ */
+static const u32 h264_cabac_table[] = {
+	0x14f10236, 0x034a14f1, 0x0236034a, 0xe47fe968, 0xfa35ff36, 0x07330000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
+	0x0029003f, 0x003f003f, 0xf7530456, 0x0061f948, 0x0d29033e, 0x000b0137,
+	0x0045ef7f, 0xf3660052, 0xf94aeb6b, 0xe57fe17f, 0xe87fee5f, 0xe57feb72,
+	0xe27fef7b, 0xf473f07a, 0xf573f43f, 0xfe44f154, 0xf368fd46, 0xf85df65a,
+	0xe27fff4a, 0xfa61f95b, 0xec7ffc38, 0xfb52f94c, 0xea7df95d, 0xf557fd4d,
+	0xfb47fc3f, 0xfc44f454, 0xf93ef941, 0x083d0538, 0xfe420140, 0x003dfe4e,
+	0x01320734, 0x0a23002c, 0x0b26012d, 0x002e052c, 0x1f110133, 0x07321c13,
+	0x10210e3e, 0xf36cf164, 0xf365f35b, 0xf45ef658, 0xf054f656, 0xf953f357,
+	0xed5e0146, 0x0048fb4a, 0x123bf866, 0xf164005f, 0xfc4b0248, 0xf54bfd47,
+	0x0f2ef345, 0x003e0041, 0x1525f148, 0x09391036, 0x003e0c48, 0x18000f09,
+	0x08190d12, 0x0f090d13, 0x0a250c12, 0x061d1421, 0x0f1e042d, 0x013a003e,
+	0x073d0c26, 0x0b2d0f27, 0x0b2a0d2c, 0x102d0c29, 0x0a311e22, 0x122a0a37,
+	0x1133112e, 0x00591aed, 0x16ef1aef, 0x1ee71cec, 0x21e925e5, 0x21e928e4,
+	0x26ef21f5, 0x28f129fa, 0x26012911, 0x1efa1b03, 0x1a1625f0, 0x23fc26f8,
+	0x26fd2503, 0x26052a00, 0x23102716, 0x0e301b25, 0x153c0c44, 0x0261fd47,
+	0xfa2afb32, 0xfd36fe3e, 0x003a013f, 0xfe48ff4a, 0xf75bfb43, 0xfb1bfd27,
+	0xfe2c002e, 0xf040f844, 0xf64efa4d, 0xf656f45c, 0xf137f63c, 0xfa3efc41,
+	0xf449f84c, 0xf950f758, 0xef6ef561, 0xec54f54f, 0xfa49fc4a, 0xf356f360,
+	0xf561ed75, 0xf84efb21, 0xfc30fe35, 0xfd3ef347, 0xf64ff456, 0xf35af261,
+	0x0000fa5d, 0xfa54f84f, 0x0042ff47, 0x003efe3c, 0xfe3bfb4b, 0xfd3efc3a,
+	0xf742ff4f, 0x00470344, 0x0a2cf93e, 0x0f240e28, 0x101b0c1d, 0x012c1424,
+	0x1220052a, 0x01300a3e, 0x112e0940, 0xf468f561, 0xf060f958, 0xf855f955,
+	0xf755f358, 0x0442fd4d, 0xfd4cfa4c, 0x0a3aff4c, 0xff53f963, 0xf25f025f,
+	0x004cfb4a, 0x0046f54b, 0x01440041, 0xf249033e, 0x043eff44, 0xf34b0b37,
+	0x05400c46, 0x0f060613, 0x07100c0e, 0x120d0d0b, 0x0d0f0f10, 0x0c170d17,
+	0x0f140e1a, 0x0e2c1128, 0x112f1811, 0x15151916, 0x1f1b161d, 0x13230e32,
+	0x0a39073f, 0xfe4dfc52, 0xfd5e0945, 0xf46d24dd, 0x24de20e6, 0x25e22ce0,
+	0x22ee22f1, 0x28f121f9, 0x23fb2100, 0x2602210d, 0x17230d3a, 0x1dfd1a00,
+	0x161e1ff9, 0x23f122fd, 0x220324ff, 0x2205200b, 0x2305220c, 0x270b1e1d,
+	0x221a1d27, 0x13421f15, 0x1f1f1932, 0xef78ec70, 0xee72f555, 0xf15cf259,
+	0xe647f151, 0xf2500044, 0xf246e838, 0xe944e832, 0xf54a17f3, 0x1af328f1,
+	0x31f22c03, 0x2d062c22, 0x21361352, 0xfd4bff17, 0x0122012b, 0x0036fe37,
+	0x003d0140, 0x0044f75c, 0xf26af361, 0xf15af45a, 0xee58f649, 0xf74ff256,
+	0xf649f646, 0xf645fb42, 0xf740fb3a, 0x023b15f6, 0x18f51cf8, 0x1cff1d03,
+	0x1d092314, 0x1d240e43, 0x14f10236, 0x034a14f1, 0x0236034a, 0xe47fe968,
+	0xfa35ff36, 0x07331721, 0x17021500, 0x01090031, 0xdb760539, 0xf34ef541,
+	0x013e0c31, 0xfc491132, 0x1240092b, 0x1d001a43, 0x105a0968, 0xd27fec68,
+	0x0143f34e, 0xf541013e, 0xfa56ef5f, 0xfa3d092d, 0xfd45fa51, 0xf5600637,
+	0x0743fb56, 0x0258003a, 0xfd4cf65e, 0x05360445, 0xfd510058, 0xf943fb4a,
+	0xfc4afb50, 0xf948013a, 0x0029003f, 0x003f003f, 0xf7530456, 0x0061f948,
+	0x0d29033e, 0x002dfc4e, 0xfd60e57e, 0xe462e765, 0xe943e452, 0xec5ef053,
+	0xea6eeb5b, 0xee66f35d, 0xe37ff95c, 0xfb59f960, 0xf36cfd2e, 0xff41ff39,
+	0xf75dfd4a, 0xf75cf857, 0xe97e0536, 0x063c063b, 0x0645ff30, 0x0044fc45,
+	0xf858fe55, 0xfa4eff4b, 0xf94d0236, 0x0532fd44, 0x0132062a, 0xfc51013f,
+	0xfc460043, 0x0239fe4c, 0x0b230440, 0x013d0b23, 0x12190c18, 0x0d1d0d24,
+	0xf65df949, 0xfe490d2e, 0x0931f964, 0x09350235, 0x0535fe3d, 0x00380038,
+	0xf33ffb3c, 0xff3e0439, 0xfa450439, 0x0e270433, 0x0d440340, 0x013d093f,
+	0x07321027, 0x052c0434, 0x0b30fb3c, 0xff3b003b, 0x1621052c, 0x0e2bff4e,
+	0x003c0945, 0x0b1c0228, 0x032c0031, 0x002e022c, 0x0233002f, 0x0427023e,
+	0x062e0036, 0x0336023a, 0x043f0633, 0x06390735, 0x06340637, 0x0b2d0e24,
+	0x0835ff52, 0x0737fd4e, 0x0f2e161f, 0xff541907, 0x1ef91c03, 0x1c042000,
+	0x22ff1e06, 0x1e062009, 0x1f131a1b, 0x1a1e2514, 0x1c221146, 0x0143053b,
+	0x0943101e, 0x12201223, 0x161d181f, 0x1726122b, 0x14290b3f, 0x093b0940,
+	0xff5efe59, 0xf76cfa4c, 0xfe2c002d, 0x0034fd40, 0xfe3bfc46, 0xfc4bf852,
+	0xef66f74d, 0x0318002a, 0x00300037, 0xfa3bf947, 0xf453f557, 0xe277013a,
+	0xfd1dff24, 0x0126022b, 0xfa37003a, 0x0040fd4a, 0xf65a0046, 0xfc1d051f,
+	0x072a013b, 0xfe3afd48, 0xfd51f561, 0x003a0805, 0x0a0e0e12, 0x0d1b0228,
+	0x003afd46, 0xfa4ff855, 0x0000f36a, 0xf06af657, 0xeb72ee6e, 0xf262ea6e,
+	0xeb6aee67, 0xeb6be96c, 0xe670f660, 0xf45ffb5b, 0xf75dea5e, 0xfb560943,
+	0xfc50f655, 0xff46073c, 0x093a053d, 0x0c320f32, 0x12311136, 0x0a29072e,
+	0xff330731, 0x08340929, 0x062f0237, 0x0d290a2c, 0x06320535, 0x0d31043f,
+	0x0640fe45, 0xfe3b0646, 0x0a2c091f, 0x0c2b0335, 0x0e220a26, 0xfd340d28,
+	0x1120072c, 0x07260d32, 0x0a391a2b, 0x0e0b0b0e, 0x090b120b, 0x150917fe,
+	0x20f120f1, 0x22eb27e9, 0x2adf29e1, 0x2ee426f4, 0x151d2de8, 0x35d330e6,
+	0x41d52bed, 0x27f61e09, 0x121a141b, 0x0039f252, 0xfb4bed61, 0xdd7d1b00,
+	0x1c001ffc, 0x1b062208, 0x1e0a1816, 0x21131620, 0x1a1f1529, 0x1a2c172f,
+	0x10410e47, 0x083c063f, 0x11411518, 0x17141a17, 0x1b201c17, 0x1c181728,
+	0x18201c1d, 0x172a1339, 0x1635163d, 0x0b560c28, 0x0b330e3b, 0xfc4ff947,
+	0xfb45f746, 0xf842f644, 0xed49f445, 0xf046f143, 0xec3eed46, 0xf042ea41,
+	0xec3f09fe, 0x1af721f7, 0x27f929fe, 0x2d033109, 0x2d1b243b, 0xfa42f923,
+	0xf92af82d, 0xfb30f438, 0xfa3cfb3e, 0xf842f84c, 0xfb55fa51, 0xf64df951,
+	0xef50ee49, 0xfc4af653, 0xf747f743, 0xff3df842, 0xf242003b, 0x023b15f3,
+	0x21f227f9, 0x2efe3302, 0x3c063d11, 0x37222a3e, 0x14f10236, 0x034a14f1,
+	0x0236034a, 0xe47fe968, 0xfa35ff36, 0x07331619, 0x22001000, 0xfe090429,
+	0xe3760241, 0xfa47f34f, 0x05340932, 0xfd460a36, 0x1a221316, 0x28003902,
+	0x29241a45, 0xd37ff165, 0xfc4cfa47, 0xf34f0534, 0x0645f35a, 0x0034082b,
+	0xfe45fb52, 0xf660023b, 0x024bfd57, 0xfd640138, 0xfd4afa55, 0x003bfd51,
+	0xf956fb5f, 0xff42ff4d, 0x0146fe56, 0xfb48003d, 0x0029003f, 0x003f003f,
+	0xf7530456, 0x0061f948, 0x0d29033e, 0x0d0f0733, 0x0250d97f, 0xee5bef60,
+	0xe651dd62, 0xe866e961, 0xe577e863, 0xeb6eee66, 0xdc7f0050, 0xfb59f95e,
+	0xfc5c0027, 0x0041f154, 0xdd7ffe49, 0xf468f75b, 0xe17f0337, 0x07380737,
+	0x083dfd35, 0x0044f94a, 0xf758f367, 0xf35bf759, 0xf25cf84c, 0xf457e96e,
+	0xe869f64e, 0xec70ef63, 0xb27fba7f, 0xce7fd27f, 0xfc42fb4e, 0xfc47f848,
+	0x023bff37, 0xf946fa4b, 0xf859de77, 0xfd4b2014, 0x1e16d47f, 0x0036fb3d,
+	0x003aff3c, 0xfd3df843, 0xe754f24a, 0xfb410534, 0x0239003d, 0xf745f546,
+	0x1237fc47, 0x003a073d, 0x09291219, 0x0920052b, 0x092f002c, 0x0033022e,
+	0x1326fc42, 0x0f260c2a, 0x09220059, 0x042d0a1c, 0x0a1f21f5, 0x34d5120f,
+	0x1c0023ea, 0x26e72200, 0x27ee20f4, 0x66a20000, 0x38f121fc, 0x1d0a25fb,
+	0x33e327f7, 0x34de45c6, 0x43c12cfb, 0x200737e3, 0x20010000, 0x1b2421e7,
+	0x22e224e4, 0x26e426e5, 0x22ee23f0, 0x22f220f8, 0x25fa2300, 0x1e0a1c12,
+	0x1a191d29, 0x004b0248, 0x084d0e23, 0x121f1123, 0x151e112d, 0x142a122d,
+	0x1b1a1036, 0x07421038, 0x0b490a43, 0xf674e970, 0xf147f93d, 0x0035fb42,
+	0xf54df750, 0xf754f657, 0xde7feb65, 0xfd27fb35, 0xf93df54b, 0xf14def5b,
+	0xe76be76f, 0xe47af54c, 0xf62cf634, 0xf639f73a, 0xf048f945, 0xfc45fb4a,
+	0xf7560242, 0xf7220120, 0x0b1f0534, 0xfe37fe43, 0x0049f859, 0x03340704,
+	0x0a081108, 0x10130325, 0xff3dfb49, 0xff46fc4e, 0x0000eb7e, 0xe97cec6e,
+	0xe67ee77c, 0xef69e579, 0xe575ef66, 0xe675e574, 0xdf7af65f, 0xf264f85f,
+	0xef6fe472, 0xfa59fe50, 0xfc52f755, 0xf851ff48, 0x05400143, 0x09380045,
+	0x01450745, 0xf945fa43, 0xf04dfe40, 0x023dfa43, 0xfd400239, 0xfd41fd42,
+	0x003e0933, 0xff42fe47, 0xfe4bff46, 0xf7480e3c, 0x1025002f, 0x12230b25,
+	0x0c290a29, 0x02300c29, 0x0d29003b, 0x03321328, 0x03421232, 0x13fa12fa,
+	0x0e001af4, 0x1ff021e7, 0x21ea25e4, 0x27e22ae2, 0x2fd62ddc, 0x31de29ef,
+	0x200945b9, 0x3fc142c0, 0x4db636d9, 0x34dd29f6, 0x240028ff, 0x1e0e1c1a,
+	0x17250c37, 0x0b4125df, 0x27dc28db, 0x26e22edf, 0x2ae228e8, 0x31e326f4,
+	0x28f626fd, 0x2efb1f14, 0x1d1e192c, 0x0c300b31, 0x1a2d1616, 0x17161b15,
+	0x21141a1c, 0x1e181b22, 0x122a1927, 0x12320c46, 0x15360e47, 0x0b531920,
+	0x15311536, 0xfb55fa51, 0xf64df951, 0xef50ee49, 0xfc4af653, 0xf747f743,
+	0xff3df842, 0xf242003b, 0x023b11f6, 0x20f32af7, 0x31fb3500, 0x4003440a,
+	0x421b2f39, 0xfb470018, 0xff24fe2a, 0xfe34f739, 0xfa3ffc41, 0xfc43f952,
+	0xfd51fd4c, 0xf948fa4e, 0xf448f244, 0xfd46fa4c, 0xfb42fb3e, 0x0039fc3d,
+	0xf73c0136, 0x023a11f6, 0x20f32af7, 0x31fb3500, 0x4003440a, 0x421b2f39,
+	0x14f10236, 0x034a14f1, 0x0236034a, 0xe47fe968, 0xfa35ff36, 0x07331d10,
+	0x19000e00, 0xf633fd3e, 0xe5631a10, 0xfc55e866, 0x05390639, 0xef490e39,
+	0x1428140a, 0x1d003600, 0x252a0c61, 0xe07fea75, 0xfe4afc55, 0xe8660539,
+	0xfa5df258, 0xfa2c0437, 0xf559f167, 0xeb741339, 0x143a0454, 0x0660013f,
+	0xfb55f36a, 0x053f064b, 0xfd5aff65, 0x0337fc4f, 0xfe4bf461, 0xf932013c,
+	0x0029003f, 0x003f003f, 0xf7530456, 0x0061f948, 0x0d29033e, 0x0722f758,
+	0xec7fdc7f, 0xef5bf25f, 0xe754e756, 0xf459ef5b, 0xe17ff24c, 0xee67f35a,
+	0xdb7f0b50, 0x054c0254, 0x054efa37, 0x043df253, 0xdb7ffb4f, 0xf568f55b,
+	0xe27f0041, 0xfe4f0048, 0xfc5cfa38, 0x0344f847, 0xf362fc56, 0xf458fb52,
+	0xfd48fc43, 0xf848f059, 0xf745ff3b, 0x05420439, 0xfc47fe47, 0x023aff4a,
+	0xfc2cff45, 0x003ef933, 0xfc2ffa2a, 0xfd29fa35, 0x084cf74e, 0xf5530934,
+	0x0043fb5a, 0x0143f148, 0xfb4bf850, 0xeb53eb40, 0xf31fe740, 0xe35e094b,
+	0x113ff84a, 0xfb23fe1b, 0x0d5b0341, 0xf945084d, 0xf642033e, 0xfd44ec51,
+	0x001e0107, 0xfd17eb4a, 0x1042e97c, 0x11252cee, 0x32deea7f, 0x0427002a,
+	0x07220b1d, 0x081f0625, 0x072a0328, 0x08210d2b, 0x0d24042f, 0x0337023a,
+	0x063c082c, 0x0b2c0e2a, 0x07300438, 0x04340d25, 0x0931133a, 0x0a300c2d,
+	0x00451421, 0x083f23ee, 0x21e71cfd, 0x180a1b00, 0x22f234d4, 0x27e81311,
+	0x1f19241d, 0x1821220f, 0x1e141649, 0x1422131f, 0x1b2c1310, 0x0f240f24,
+	0x151c1915, 0x1e141f0c, 0x1b10182a, 0x005d0e38, 0x0f391a26, 0xe87fe873,
+	0xea52f73e, 0x0035003b, 0xf255f359, 0xf35ef55c, 0xe37feb64, 0xf239f443,
+	0xf547f64d, 0xeb55f058, 0xe968f162, 0xdb7ff652, 0xf830f83d, 0xf842f946,
+	0xf24bf64f, 0xf753f45c, 0xee6cfc4f, 0xea45f04b, 0xfe3a013a, 0xf34ef753,
+	0xfc51f363, 0xf351fa26, 0xf33efa3a, 0xfe3bf049, 0xf64cf356, 0xf753f657,
+	0x0000ea7f, 0xe77fe778, 0xe57fed72, 0xe975e776, 0xe675e871, 0xe476e178,
+	0xdb7cf65e, 0xf166f663, 0xf36ace7f, 0xfb5c1139, 0xfb56f35e, 0xf45bfe4d,
+	0x0047ff49, 0x0440f951, 0x05400f39, 0x01430044, 0xf6430144, 0x004d0240,
+	0x0044fb4e, 0x0737053b, 0x02410e36, 0x0f2c053c, 0x0246fe4c, 0xee560c46,
+	0x0540f446, 0x0b370538, 0x00450241, 0xfa4a0536, 0x0736fa4c, 0xf552fe4d,
+	0xfe4d192a, 0x11f310f7, 0x11f41beb, 0x25e229d8, 0x2ad730d1, 0x27e02ed8,
+	0x34cd2ed7, 0x34d92bed, 0x200b3dc9, 0x38d23ece, 0x51bd2dec, 0x23fe1c0f,
+	0x22012701, 0x1e111426, 0x122d0f36, 0x004f24f0, 0x25f225ef, 0x2001220f,
+	0x1d0f1819, 0x22161f10, 0x23121f1c, 0x2129241c, 0x1b2f153e, 0x121f131a,
+	0x24181817, 0x1b10181e, 0x1f1d1629, 0x162a103c, 0x0f340e3c, 0x034ef07b,
+	0x15351638, 0x193d1521, 0x1332113d, 0xfd4ef84a, 0xf748f648, 0xee4bf447,
+	0xf53ffb46, 0xef4bf248, 0xf043f835, 0xf23bf734, 0xf54409fe, 0x1ef61ffc,
+	0x21ff2107, 0x1f0c2517, 0x1f261440, 0xf747f925, 0xf82cf531, 0xf638f43b,
+	0xf83ff743, 0xfa44f64f, 0xfd4ef84a, 0xf748f648, 0xee4bf447, 0xf53ffb46,
+	0xef4bf248, 0xf043f835, 0xf23bf734, 0xf54409fe, 0x1ef61ffc, 0x21ff2107,
+	0x1f0c2517, 0x1f261440
+};
+
+/*
+ * NOTE: The scaling lists are in zig-zag order, apply inverse scanning process
+ * to get the values in matrix order. In addition, the hardware requires bytes
+ * swapped within each subsequent 4 bytes. Both arrays below include both
+ * transformations.
+ */
+static const u32 zig_zag_4x4[] = {
+	3, 2, 7, 11, 6, 1, 0, 5, 10, 15, 14, 9, 4, 8, 13, 12
+};
+
+static const u32 zig_zag_8x8[] = {
+	3, 2, 11, 19, 10, 1, 0, 9, 18, 27, 35, 26, 17, 8, 7, 6,
+	15, 16, 25, 34, 43, 51, 42, 33, 24, 23, 14, 5, 4, 13, 22, 31,
+	32, 41, 50, 59, 58, 49, 40, 39, 30, 21, 12, 20, 29, 38, 47, 48,
+	57, 56, 55, 46, 37, 28, 36, 45, 54, 63, 62, 53, 44, 52, 61, 60
+};
+
+static void
+reorder_scaling_list(struct hantro_ctx *ctx)
+{
+	const struct hantro_h264_dec_ctrls *ctrls = &ctx->h264_dec.ctrls;
+	const struct v4l2_ctrl_h264_scaling_matrix *scaling = ctrls->scaling;
+	const size_t num_list_4x4 = ARRAY_SIZE(scaling->scaling_list_4x4);
+	const size_t list_len_4x4 = ARRAY_SIZE(scaling->scaling_list_4x4[0]);
+	const size_t num_list_8x8 = ARRAY_SIZE(scaling->scaling_list_8x8);
+	const size_t list_len_8x8 = ARRAY_SIZE(scaling->scaling_list_8x8[0]);
+	struct hantro_h264_dec_priv_tbl *tbl = ctx->h264_dec.priv.cpu;
+	u8 *dst = tbl->scaling_list;
+	const u8 *src;
+	int i, j;
+
+	BUILD_BUG_ON(ARRAY_SIZE(zig_zag_4x4) != list_len_4x4);
+	BUILD_BUG_ON(ARRAY_SIZE(zig_zag_8x8) != list_len_8x8);
+	BUILD_BUG_ON(ARRAY_SIZE(tbl->scaling_list) !=
+		     num_list_4x4 * list_len_4x4 +
+		     num_list_8x8 * list_len_8x8);
+
+	src = &scaling->scaling_list_4x4[0][0];
+	for (i = 0; i < num_list_4x4; ++i) {
+		for (j = 0; j < list_len_4x4; ++j)
+			dst[zig_zag_4x4[j]] = src[j];
+		src += list_len_4x4;
+		dst += list_len_4x4;
+	}
+
+	src = &scaling->scaling_list_8x8[0][0];
+	for (i = 0; i < num_list_8x8; ++i) {
+		for (j = 0; j < list_len_8x8; ++j)
+			dst[zig_zag_8x8[j]] = src[j];
+		src += list_len_8x8;
+		dst += list_len_8x8;
+	}
+}
+
+static void prepare_table(struct hantro_ctx *ctx)
+{
+	const struct hantro_h264_dec_ctrls *ctrls = &ctx->h264_dec.ctrls;
+	const struct v4l2_ctrl_h264_decode_params *dec_param = ctrls->decode;
+	struct hantro_h264_dec_priv_tbl *tbl = ctx->h264_dec.priv.cpu;
+	const struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
+	int i;
+
+	for (i = 0; i < HANTRO_H264_DPB_SIZE; ++i) {
+		tbl->poc[i * 2] = dpb[i].top_field_order_cnt;
+		tbl->poc[i * 2 + 1] = dpb[i].bottom_field_order_cnt;
+	}
+
+	tbl->poc[32] = dec_param->top_field_order_cnt;
+	tbl->poc[33] = dec_param->bottom_field_order_cnt;
+
+	reorder_scaling_list(ctx);
+}
+
+struct hantro_h264_reflist_builder {
+	const struct v4l2_h264_dpb_entry *dpb;
+	s32 pocs[HANTRO_H264_DPB_SIZE];
+	u8 unordered_reflist[HANTRO_H264_DPB_SIZE];
+	s32 curpoc;
+	u8 num_valid;
+};
+
+static s32 get_poc(enum v4l2_field field, s32 top_field_order_cnt,
+		   s32 bottom_field_order_cnt)
+{
+	switch (field) {
+	case V4L2_FIELD_TOP:
+		return top_field_order_cnt;
+	case V4L2_FIELD_BOTTOM:
+		return bottom_field_order_cnt;
+	default:
+		break;
+	}
+
+	return min(top_field_order_cnt, bottom_field_order_cnt);
+}
+
+static void
+init_reflist_builder(struct hantro_ctx *ctx,
+		     struct hantro_h264_reflist_builder *b)
+{
+	const struct v4l2_ctrl_h264_decode_params *dec_param;
+	struct vb2_v4l2_buffer *buf = hantro_get_dst_buf(ctx);
+	const struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
+	struct vb2_queue *cap_q = &ctx->fh.m2m_ctx->cap_q_ctx.q;
+	unsigned int i;
+
+	dec_param = ctx->h264_dec.ctrls.decode;
+
+	memset(b, 0, sizeof(*b));
+	b->dpb = dpb;
+	b->curpoc = get_poc(buf->field, dec_param->top_field_order_cnt,
+			    dec_param->bottom_field_order_cnt);
+
+	for (i = 0; i < ARRAY_SIZE(ctx->h264_dec.dpb); i++) {
+		int buf_idx;
+
+		if (!(dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE))
+			continue;
+
+		buf_idx = vb2_find_timestamp(cap_q, dpb[i].reference_ts, 0);
+		if (buf_idx < 0)
+			continue;
+
+		buf = to_vb2_v4l2_buffer(vb2_get_buffer(cap_q, buf_idx));
+		b->pocs[i] = get_poc(buf->field, dpb[i].top_field_order_cnt,
+				     dpb[i].bottom_field_order_cnt);
+		b->unordered_reflist[b->num_valid] = i;
+		b->num_valid++;
+	}
+
+	for (i = b->num_valid; i < ARRAY_SIZE(ctx->h264_dec.dpb); i++)
+		b->unordered_reflist[i] = i;
+}
+
+static int p_ref_list_cmp(const void *ptra, const void *ptrb, const void *data)
+{
+	const struct hantro_h264_reflist_builder *builder = data;
+	const struct v4l2_h264_dpb_entry *a, *b;
+	u8 idxa, idxb;
+
+	idxa = *((u8 *)ptra);
+	idxb = *((u8 *)ptrb);
+	a = &builder->dpb[idxa];
+	b = &builder->dpb[idxb];
+
+	if ((a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM) !=
+	    (b->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)) {
+		/* Short term pics firt. */
+		if (!(a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM))
+			return -1;
+		else
+			return 1;
+	}
+
+	/*
+	 * Short term pics in descending pic num order, long term ones in
+	 * ascending order.
+	 */
+	if (!(a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM))
+		return b->frame_num - a->frame_num;
+
+	return a->pic_num - b->pic_num;
+}
+
+static int b0_ref_list_cmp(const void *ptra, const void *ptrb, const void *data)
+{
+	const struct hantro_h264_reflist_builder *builder = data;
+	const struct v4l2_h264_dpb_entry *a, *b;
+	s32 poca, pocb;
+	u8 idxa, idxb;
+
+	idxa = *((u8 *)ptra);
+	idxb = *((u8 *)ptrb);
+	a = &builder->dpb[idxa];
+	b = &builder->dpb[idxb];
+
+	if ((a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM) !=
+	    (b->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)) {
+		/* Short term pics firt. */
+		if (!(a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM))
+			return -1;
+		else
+			return 1;
+	}
+
+	/* Long term pics in ascending pic num order. */
+	if (a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
+		return a->pic_num - b->pic_num;
+
+	poca = builder->pocs[idxa];
+	pocb = builder->pocs[idxb];
+
+	/*
+	 * Short term pics with POC < cur POC first in POC descending order
+	 * followed by short term pics with POC > cur POC in POC ascending
+	 * order.
+	 */
+	if ((poca < builder->curpoc) != (pocb < builder->curpoc))
+		return POC_CMP(poca, pocb);
+	else if (poca < builder->curpoc)
+		return POC_CMP(pocb, poca);
+
+	return POC_CMP(poca, pocb);
+}
+
+static int b1_ref_list_cmp(const void *ptra, const void *ptrb, const void *data)
+{
+	const struct hantro_h264_reflist_builder *builder = data;
+	const struct v4l2_h264_dpb_entry *a, *b;
+	s32 poca, pocb;
+	u8 idxa, idxb;
+
+	idxa = *((u8 *)ptra);
+	idxb = *((u8 *)ptrb);
+	a = &builder->dpb[idxa];
+	b = &builder->dpb[idxb];
+
+	if ((a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM) !=
+	    (b->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)) {
+		/* Short term pics firt. */
+		if (!(a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM))
+			return -1;
+		else
+			return 1;
+	}
+
+	/* Long term pics in ascending pic num order. */
+	if (a->flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
+		return a->pic_num - b->pic_num;
+
+	poca = builder->pocs[idxa];
+	pocb = builder->pocs[idxb];
+
+	/*
+	 * Short term pics with POC > cur POC first in POC ascending order
+	 * followed by short term pics with POC > cur POC in POC descending
+	 * order.
+	 */
+	if ((poca < builder->curpoc) != (pocb < builder->curpoc))
+		return POC_CMP(pocb, poca);
+	else if (poca < builder->curpoc)
+		return POC_CMP(pocb, poca);
+
+	return POC_CMP(poca, pocb);
+}
+
+static void
+build_p_ref_list(const struct hantro_h264_reflist_builder *builder,
+		 u8 *reflist)
+{
+	memcpy(reflist, builder->unordered_reflist,
+	       sizeof(builder->unordered_reflist));
+	sort_r(reflist, builder->num_valid, sizeof(*reflist),
+	       p_ref_list_cmp, NULL, builder);
+}
+
+static void
+build_b_ref_lists(const struct hantro_h264_reflist_builder *builder,
+		  u8 *b0_reflist, u8 *b1_reflist)
+{
+	memcpy(b0_reflist, builder->unordered_reflist,
+	       sizeof(builder->unordered_reflist));
+	sort_r(b0_reflist, builder->num_valid, sizeof(*b0_reflist),
+	       b0_ref_list_cmp, NULL, builder);
+
+	memcpy(b1_reflist, builder->unordered_reflist,
+	       sizeof(builder->unordered_reflist));
+	sort_r(b1_reflist, builder->num_valid, sizeof(*b1_reflist),
+	       b1_ref_list_cmp, NULL, builder);
+
+	if (builder->num_valid > 1 &&
+	    !memcmp(b1_reflist, b0_reflist, builder->num_valid))
+		swap(b1_reflist[0], b1_reflist[1]);
+}
+
+static bool dpb_entry_match(const struct v4l2_h264_dpb_entry *a,
+			    const struct v4l2_h264_dpb_entry *b)
+{
+	return a->top_field_order_cnt == b->top_field_order_cnt &&
+	       a->bottom_field_order_cnt == b->bottom_field_order_cnt;
+}
+
+static void update_dpb(struct hantro_ctx *ctx)
+{
+	const struct v4l2_ctrl_h264_decode_params *dec_param;
+	DECLARE_BITMAP(new, ARRAY_SIZE(dec_param->dpb)) = { 0, };
+	DECLARE_BITMAP(used, ARRAY_SIZE(dec_param->dpb)) = { 0, };
+	unsigned int i, j;
+
+	dec_param = ctx->h264_dec.ctrls.decode;
+
+	/* Disable all entries by default. */
+	for (i = 0; i < ARRAY_SIZE(ctx->h264_dec.dpb); i++)
+		ctx->h264_dec.dpb[i].flags &= ~V4L2_H264_DPB_ENTRY_FLAG_ACTIVE;
+
+	/* Try to match new DPB entries with existing ones by their POCs. */
+	for (i = 0; i < ARRAY_SIZE(dec_param->dpb); i++) {
+		const struct v4l2_h264_dpb_entry *ndpb = &dec_param->dpb[i];
+
+		if (!(ndpb->flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE))
+			continue;
+
+		/*
+		 * To cut off some comparisons, iterate only on target DPB
+		 * entries which are not used yet.
+		 */
+		for_each_clear_bit(j, used, ARRAY_SIZE(ctx->h264_dec.dpb)) {
+			struct v4l2_h264_dpb_entry *cdpb;
+
+			cdpb = &ctx->h264_dec.dpb[j];
+			if (cdpb->flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE ||
+			    !dpb_entry_match(cdpb, ndpb))
+				continue;
+
+			*cdpb = *ndpb;
+			set_bit(j, used);
+			break;
+		}
+
+		if (j == ARRAY_SIZE(ctx->h264_dec.dpb))
+			set_bit(i, new);
+	}
+
+	/* For entries that could not be matched, use remaining free slots. */
+	for_each_set_bit(i, new, ARRAY_SIZE(dec_param->dpb)) {
+		const struct v4l2_h264_dpb_entry *ndpb = &dec_param->dpb[i];
+		struct v4l2_h264_dpb_entry *cdpb;
+
+		/*
+		 * Both arrays are of the same sizes, so there is no way
+		 * we can end up with no space in target array, unless
+		 * something is buggy.
+		 */
+		j = find_first_zero_bit(used, ARRAY_SIZE(ctx->h264_dec.dpb));
+		if (WARN_ON(j >= ARRAY_SIZE(ctx->h264_dec.dpb)))
+			return;
+
+		cdpb = &ctx->h264_dec.dpb[j];
+		*cdpb = *ndpb;
+		set_bit(j, used);
+	}
+}
+
+struct vb2_buffer *hantro_h264_get_ref_buf(struct hantro_ctx *ctx,
+					   unsigned int dpb_idx)
+{
+	struct vb2_queue *cap_q = &ctx->fh.m2m_ctx->cap_q_ctx.q;
+	struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
+	struct vb2_buffer *buf;
+	int buf_idx = -1;
+
+	if (dpb[dpb_idx].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE)
+		buf_idx = vb2_find_timestamp(cap_q,
+					     dpb[dpb_idx].reference_ts, 0);
+
+	if (buf_idx >= 0) {
+		buf = vb2_get_buffer(cap_q, buf_idx);
+	} else {
+		struct vb2_v4l2_buffer *dst_buf;
+
+		/*
+		 * If a DPB entry is unused or invalid, address of current
+		 * destination buffer is returned.
+		 */
+		dst_buf = hantro_get_dst_buf(ctx);
+		buf = &dst_buf->vb2_buf;
+	}
+
+	return buf;
+}
+
+int hantro_h264_dec_prepare_run(struct hantro_ctx *ctx)
+{
+	struct hantro_h264_dec_hw_ctx *h264_ctx = &ctx->h264_dec;
+	struct hantro_h264_dec_ctrls *ctrls = &h264_ctx->ctrls;
+	struct hantro_h264_reflist_builder reflist_builder;
+
+	hantro_prepare_run(ctx);
+
+	ctrls->scaling =
+		hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX);
+	if (WARN_ON(!ctrls->scaling))
+		return -EINVAL;
+
+	ctrls->decode =
+		hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS);
+	if (WARN_ON(!ctrls->decode))
+		return -EINVAL;
+
+	ctrls->slices =
+		hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS);
+	if (WARN_ON(!ctrls->slices))
+		return -EINVAL;
+
+	ctrls->sps =
+		hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_H264_SPS);
+	if (WARN_ON(!ctrls->sps))
+		return -EINVAL;
+
+	ctrls->pps =
+		hantro_get_ctrl(ctx, V4L2_CID_MPEG_VIDEO_H264_PPS);
+	if (WARN_ON(!ctrls->pps))
+		return -EINVAL;
+
+	/* Update the DPB with new refs. */
+	update_dpb(ctx);
+
+	/* Prepare data in memory. */
+	prepare_table(ctx);
+
+	/* Build the P/B{0,1} ref lists. */
+	init_reflist_builder(ctx, &reflist_builder);
+	build_p_ref_list(&reflist_builder, h264_ctx->reflists.p);
+	build_b_ref_lists(&reflist_builder, h264_ctx->reflists.b0,
+			  h264_ctx->reflists.b1);
+	return 0;
+}
+
+void hantro_h264_dec_exit(struct hantro_ctx *ctx)
+{
+	struct hantro_dev *vpu = ctx->dev;
+	struct hantro_h264_dec_hw_ctx *h264_dec = &ctx->h264_dec;
+	struct hantro_aux_buf *priv = &h264_dec->priv;
+
+	dma_free_coherent(vpu->dev, priv->size, priv->cpu, priv->dma);
+}
+
+int hantro_h264_dec_init(struct hantro_ctx *ctx)
+{
+	struct hantro_dev *vpu = ctx->dev;
+	struct hantro_h264_dec_hw_ctx *h264_dec = &ctx->h264_dec;
+	struct hantro_aux_buf *priv = &h264_dec->priv;
+	struct hantro_h264_dec_priv_tbl *tbl;
+	struct v4l2_pix_format_mplane pix_mp;
+
+	priv->cpu = dma_alloc_coherent(vpu->dev, sizeof(*tbl), &priv->dma,
+				       GFP_KERNEL);
+	if (!priv->cpu)
+		return -ENOMEM;
+
+	priv->size = sizeof(*tbl);
+	tbl = priv->cpu;
+	memcpy(tbl->cabac_table, h264_cabac_table, sizeof(tbl->cabac_table));
+
+	v4l2_fill_pixfmt_mp(&pix_mp, ctx->dst_fmt.pixelformat,
+			    ctx->dst_fmt.width, ctx->dst_fmt.height);
+	h264_dec->pic_size = pix_mp.plane_fmt[0].sizeimage;
+
+	return 0;
+}
diff --git a/drivers/staging/media/hantro/hantro_hw.h b/drivers/staging/media/hantro/hantro_hw.h
index 2b8029674a75..75f1ce45a21f 100644
--- a/drivers/staging/media/hantro/hantro_hw.h
+++ b/drivers/staging/media/hantro/hantro_hw.h
@@ -11,6 +11,7 @@
 
 #include <linux/interrupt.h>
 #include <linux/v4l2-controls.h>
+#include <media/h264-ctrls.h>
 #include <media/mpeg2-ctrls.h>
 #include <media/vp8-ctrls.h>
 #include <media/videobuf2-core.h>
@@ -42,6 +43,54 @@ struct hantro_jpeg_enc_hw_ctx {
 	struct hantro_aux_buf bounce_buffer;
 };
 
+/* Max. number of entries in the DPB (HW limitation). */
+#define HANTRO_H264_DPB_SIZE		16
+
+/**
+ * struct hantro_h264_dec_ctrls
+ * @decode:	Decode params
+ * @scaling:	Scaling info
+ * @slice:	Slice params
+ * @sps:	SPS info
+ * @pps:	PPS info
+ */
+struct hantro_h264_dec_ctrls {
+	const struct v4l2_ctrl_h264_decode_params *decode;
+	const struct v4l2_ctrl_h264_scaling_matrix *scaling;
+	const struct v4l2_ctrl_h264_slice_params *slices;
+	const struct v4l2_ctrl_h264_sps *sps;
+	const struct v4l2_ctrl_h264_pps *pps;
+};
+
+/**
+ * struct hantro_h264_dec_reflists
+ * @p:		P reflist
+ * @b0:		B0 reflist
+ * @b1:		B1 reflist
+ */
+struct hantro_h264_dec_reflists {
+	u8 p[HANTRO_H264_DPB_SIZE];
+	u8 b0[HANTRO_H264_DPB_SIZE];
+	u8 b1[HANTRO_H264_DPB_SIZE];
+};
+
+/**
+ * struct hantro_h264_dec_hw_ctx
+ * @priv:	Private auxiliary buffer for hardware.
+ * @dpb:	DPB
+ * @reflists:	P/B0/B1 reflists
+ * @ctrls:	V4L2 controls attached to a run
+ * @pic_size:	Size in bytes of decoded picture, this is needed
+ *		to pass the location of motion vectors.
+ */
+struct hantro_h264_dec_hw_ctx {
+	struct hantro_aux_buf priv;
+	struct v4l2_h264_dpb_entry dpb[HANTRO_H264_DPB_SIZE];
+	struct hantro_h264_dec_reflists reflists;
+	struct hantro_h264_dec_ctrls ctrls;
+	size_t pic_size;
+};
+
 /**
  * struct hantro_mpeg2_dec_hw_ctx
  * @qtable:		Quantization table
@@ -109,6 +158,12 @@ void rk3399_vpu_jpeg_enc_run(struct hantro_ctx *ctx);
 int hantro_jpeg_enc_init(struct hantro_ctx *ctx);
 void hantro_jpeg_enc_exit(struct hantro_ctx *ctx);
 
+struct vb2_buffer *hantro_h264_get_ref_buf(struct hantro_ctx *ctx,
+					   unsigned int dpb_idx);
+int hantro_h264_dec_prepare_run(struct hantro_ctx *ctx);
+int hantro_h264_dec_init(struct hantro_ctx *ctx);
+void hantro_h264_dec_exit(struct hantro_ctx *ctx);
+
 void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx);
 void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx);
 void hantro_mpeg2_dec_copy_qtable(u8 *qtable,
diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c
index cd4eaa256e8b..3dae52abb96c 100644
--- a/drivers/staging/media/hantro/hantro_v4l2.c
+++ b/drivers/staging/media/hantro/hantro_v4l2.c
@@ -239,6 +239,15 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f,
 		/* Fill remaining fields */
 		v4l2_fill_pixfmt_mp(pix_mp, fmt->fourcc, pix_mp->width,
 				    pix_mp->height);
+		/*
+		 * The H264 decoder needs extra space on the output buffers
+		 * to store motion vectors. This is needed for reference
+		 * frames.
+		 */
+		if (ctx->vpu_src_fmt->fourcc == V4L2_PIX_FMT_H264_SLICE)
+			pix_mp->plane_fmt[0].sizeimage +=
+				128 * DIV_ROUND_UP(pix_mp->width, 16) *
+				      DIV_ROUND_UP(pix_mp->height, 16);
 	} else if (!pix_mp->plane_fmt[0].sizeimage) {
 		/*
 		 * For coded formats the application can specify
@@ -345,6 +354,7 @@ hantro_update_requires_request(struct hantro_ctx *ctx, u32 fourcc)
 		break;
 	case V4L2_PIX_FMT_MPEG2_SLICE:
 	case V4L2_PIX_FMT_VP8_FRAME:
+	case V4L2_PIX_FMT_H264_SLICE:
 		ctx->fh.m2m_ctx->out_q_ctx.q.requires_requests = true;
 		break;
 	default:
-- 
2.22.0

[PATCH v7 10/11] media: hantro: Add support for H264 decoding on G1

[Ezequiel Garcia]

From: Hertz Wong <hertz.wong@rock-chips.com>

Add the G1 specific bits to support H264 decoding.

Signed-off-by: Hertz Wong <hertz.wong@rock-chips.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
---
Changes from v7:
* None.
Changes from v6:
* None.
Changes from v5:
* None.
Changes from v4:
* Update to use pic_size from the H264 private context struct.
* Remove unused variable.
---
 drivers/staging/media/hantro/Makefile         |   1 +
 .../staging/media/hantro/hantro_g1_h264_dec.c | 292 ++++++++++++++++++
 drivers/staging/media/hantro/hantro_hw.h      |   1 +
 3 files changed, 294 insertions(+)
 create mode 100644 drivers/staging/media/hantro/hantro_g1_h264_dec.c

diff --git a/drivers/staging/media/hantro/Makefile b/drivers/staging/media/hantro/Makefile
index 0f0d3afb1cca..5d6b0383d280 100644
--- a/drivers/staging/media/hantro/Makefile
+++ b/drivers/staging/media/hantro/Makefile
@@ -4,6 +4,7 @@ hantro-vpu-y += \
 		hantro_drv.o \
 		hantro_v4l2.o \
 		hantro_h1_jpeg_enc.o \
+		hantro_g1_h264_dec.o \
 		hantro_g1_mpeg2_dec.o \
 		hantro_g1_vp8_dec.o \
 		rk3399_vpu_hw_jpeg_enc.o \
diff --git a/drivers/staging/media/hantro/hantro_g1_h264_dec.c b/drivers/staging/media/hantro/hantro_g1_h264_dec.c
new file mode 100644
index 000000000000..7ab534936843
--- /dev/null
+++ b/drivers/staging/media/hantro/hantro_g1_h264_dec.c
@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Rockchip RK3288 VPU codec driver
+ *
+ * Copyright (c) 2014 Rockchip Electronics Co., Ltd.
+ *	Hertz Wong <hertz.wong@rock-chips.com>
+ *	Herman Chen <herman.chen@rock-chips.com>
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *	Tomasz Figa <tfiga@chromium.org>
+ */
+
+#include <linux/types.h>
+#include <linux/sort.h>
+
+#include <media/v4l2-mem2mem.h>
+
+#include "hantro_g1_regs.h"
+#include "hantro_hw.h"
+#include "hantro_v4l2.h"
+
+static void set_params(struct hantro_ctx *ctx)
+{
+	const struct hantro_h264_dec_ctrls *ctrls = &ctx->h264_dec.ctrls;
+	const struct v4l2_ctrl_h264_decode_params *dec_param = ctrls->decode;
+	const struct v4l2_ctrl_h264_slice_params *slices = ctrls->slices;
+	const struct v4l2_ctrl_h264_sps *sps = ctrls->sps;
+	const struct v4l2_ctrl_h264_pps *pps = ctrls->pps;
+	struct vb2_v4l2_buffer *src_buf = hantro_get_src_buf(ctx);
+	struct hantro_dev *vpu = ctx->dev;
+	u32 reg;
+
+	/* Decoder control register 0. */
+	reg = G1_REG_DEC_CTRL0_DEC_AXI_WR_ID(0x0);
+	if (sps->flags & V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD)
+		reg |= G1_REG_DEC_CTRL0_SEQ_MBAFF_E;
+	reg |= G1_REG_DEC_CTRL0_PICORD_COUNT_E;
+	if (dec_param->nal_ref_idc)
+		reg |= G1_REG_DEC_CTRL0_WRITE_MVS_E;
+
+	if (!(sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY) &&
+	    (sps->flags & V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD ||
+	     slices[0].flags & V4L2_H264_SLICE_FLAG_FIELD_PIC))
+		reg |= G1_REG_DEC_CTRL0_PIC_INTERLACE_E;
+	if (slices[0].flags & V4L2_H264_SLICE_FLAG_FIELD_PIC)
+		reg |= G1_REG_DEC_CTRL0_PIC_FIELDMODE_E;
+	if (!(slices[0].flags & V4L2_H264_SLICE_FLAG_BOTTOM_FIELD))
+		reg |= G1_REG_DEC_CTRL0_PIC_TOPFIELD_E;
+	vdpu_write_relaxed(vpu, reg, G1_REG_DEC_CTRL0);
+
+	/* Decoder control register 1. */
+	reg = G1_REG_DEC_CTRL1_PIC_MB_WIDTH(sps->pic_width_in_mbs_minus1 + 1) |
+	      G1_REG_DEC_CTRL1_PIC_MB_HEIGHT_P(sps->pic_height_in_map_units_minus1 + 1) |
+	      G1_REG_DEC_CTRL1_REF_FRAMES(sps->max_num_ref_frames);
+	vdpu_write_relaxed(vpu, reg, G1_REG_DEC_CTRL1);
+
+	/* Decoder control register 2. */
+	reg = G1_REG_DEC_CTRL2_CH_QP_OFFSET(pps->chroma_qp_index_offset) |
+	      G1_REG_DEC_CTRL2_CH_QP_OFFSET2(pps->second_chroma_qp_index_offset);
+
+	/* always use the matrix sent from userspace */
+	reg |= G1_REG_DEC_CTRL2_TYPE1_QUANT_E;
+
+	if (slices[0].flags &  V4L2_H264_SLICE_FLAG_FIELD_PIC)
+		reg |= G1_REG_DEC_CTRL2_FIELDPIC_FLAG_E;
+	vdpu_write_relaxed(vpu, reg, G1_REG_DEC_CTRL2);
+
+	/* Decoder control register 3. */
+	reg = G1_REG_DEC_CTRL3_START_CODE_E |
+	      G1_REG_DEC_CTRL3_INIT_QP(pps->pic_init_qp_minus26 + 26) |
+	      G1_REG_DEC_CTRL3_STREAM_LEN(vb2_get_plane_payload(&src_buf->vb2_buf, 0));
+	vdpu_write_relaxed(vpu, reg, G1_REG_DEC_CTRL3);
+
+	/* Decoder control register 4. */
+	reg = G1_REG_DEC_CTRL4_FRAMENUM_LEN(sps->log2_max_frame_num_minus4 + 4) |
+	      G1_REG_DEC_CTRL4_FRAMENUM(slices[0].frame_num) |
+	      G1_REG_DEC_CTRL4_WEIGHT_BIPR_IDC(pps->weighted_bipred_idc);
+	if (pps->flags & V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE)
+		reg |= G1_REG_DEC_CTRL4_CABAC_E;
+	if (sps->flags & V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE)
+		reg |= G1_REG_DEC_CTRL4_DIR_8X8_INFER_E;
+	if (sps->chroma_format_idc == 0)
+		reg |= G1_REG_DEC_CTRL4_BLACKWHITE_E;
+	if (pps->flags & V4L2_H264_PPS_FLAG_WEIGHTED_PRED)
+		reg |= G1_REG_DEC_CTRL4_WEIGHT_PRED_E;
+	vdpu_write_relaxed(vpu, reg, G1_REG_DEC_CTRL4);
+
+	/* Decoder control register 5. */
+	reg = G1_REG_DEC_CTRL5_REFPIC_MK_LEN(slices[0].dec_ref_pic_marking_bit_size) |
+	      G1_REG_DEC_CTRL5_IDR_PIC_ID(slices[0].idr_pic_id);
+	if (pps->flags & V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED)
+		reg |= G1_REG_DEC_CTRL5_CONST_INTRA_E;
+	if (pps->flags & V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT)
+		reg |= G1_REG_DEC_CTRL5_FILT_CTRL_PRES;
+	if (pps->flags & V4L2_H264_PPS_FLAG_REDUNDANT_PIC_CNT_PRESENT)
+		reg |= G1_REG_DEC_CTRL5_RDPIC_CNT_PRES;
+	if (pps->flags & V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE)
+		reg |= G1_REG_DEC_CTRL5_8X8TRANS_FLAG_E;
+	if (dec_param->flags & V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC)
+		reg |= G1_REG_DEC_CTRL5_IDR_PIC_E;
+	vdpu_write_relaxed(vpu, reg, G1_REG_DEC_CTRL5);
+
+	/* Decoder control register 6. */
+	reg = G1_REG_DEC_CTRL6_PPS_ID(slices[0].pic_parameter_set_id) |
+	      G1_REG_DEC_CTRL6_REFIDX0_ACTIVE(pps->num_ref_idx_l0_default_active_minus1 + 1) |
+	      G1_REG_DEC_CTRL6_REFIDX1_ACTIVE(pps->num_ref_idx_l1_default_active_minus1 + 1) |
+	      G1_REG_DEC_CTRL6_POC_LENGTH(slices[0].pic_order_cnt_bit_size);
+	vdpu_write_relaxed(vpu, reg, G1_REG_DEC_CTRL6);
+
+	/* Error concealment register. */
+	vdpu_write_relaxed(vpu, 0, G1_REG_ERR_CONC);
+
+	/* Prediction filter tap register. */
+	vdpu_write_relaxed(vpu,
+			   G1_REG_PRED_FLT_PRED_BC_TAP_0_0(1) |
+			   G1_REG_PRED_FLT_PRED_BC_TAP_0_1(-5 & 0x3ff) |
+			   G1_REG_PRED_FLT_PRED_BC_TAP_0_2(20),
+			   G1_REG_PRED_FLT);
+
+	/* Reference picture buffer control register. */
+	vdpu_write_relaxed(vpu, 0, G1_REG_REF_BUF_CTRL);
+
+	/* Reference picture buffer control register 2. */
+	vdpu_write_relaxed(vpu, G1_REG_REF_BUF_CTRL2_APF_THRESHOLD(8),
+			   G1_REG_REF_BUF_CTRL2);
+}
+
+static void set_ref(struct hantro_ctx *ctx)
+{
+	struct v4l2_h264_dpb_entry *dpb = ctx->h264_dec.dpb;
+	const u8 *b0_reflist, *b1_reflist, *p_reflist;
+	struct hantro_dev *vpu = ctx->dev;
+	u32 dpb_longterm = 0;
+	u32 dpb_valid = 0;
+	int reg_num;
+	u32 reg;
+	int i;
+
+	/*
+	 * Set up bit maps of valid and long term DPBs.
+	 * NOTE: The bits are reversed, i.e. MSb is DPB 0.
+	 */
+	for (i = 0; i < HANTRO_H264_DPB_SIZE; ++i) {
+		if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE)
+			dpb_valid |= BIT(HANTRO_H264_DPB_SIZE - 1 - i);
+
+		if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
+			dpb_longterm |= BIT(HANTRO_H264_DPB_SIZE - 1 - i);
+	}
+	vdpu_write_relaxed(vpu, dpb_valid << 16, G1_REG_VALID_REF);
+	vdpu_write_relaxed(vpu, dpb_longterm << 16, G1_REG_LT_REF);
+
+	/*
+	 * Set up reference frame picture numbers.
+	 *
+	 * Each G1_REG_REF_PIC(x) register contains numbers of two
+	 * subsequential reference pictures.
+	 */
+	for (i = 0; i < HANTRO_H264_DPB_SIZE; i += 2) {
+		reg = 0;
+		if (dpb[i].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
+			reg |= G1_REG_REF_PIC_REFER0_NBR(dpb[i].pic_num);
+		else
+			reg |= G1_REG_REF_PIC_REFER0_NBR(dpb[i].frame_num);
+
+		if (dpb[i + 1].flags & V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM)
+			reg |= G1_REG_REF_PIC_REFER1_NBR(dpb[i + 1].pic_num);
+		else
+			reg |= G1_REG_REF_PIC_REFER1_NBR(dpb[i + 1].frame_num);
+
+		vdpu_write_relaxed(vpu, reg, G1_REG_REF_PIC(i / 2));
+	}
+
+	b0_reflist = ctx->h264_dec.reflists.b0;
+	b1_reflist = ctx->h264_dec.reflists.b1;
+	p_reflist = ctx->h264_dec.reflists.p;
+
+	/*
+	 * Each G1_REG_BD_REF_PIC(x) register contains three entries
+	 * of each forward and backward picture list.
+	 */
+	reg_num = 0;
+	for (i = 0; i < 15; i += 3) {
+		reg = G1_REG_BD_REF_PIC_BINIT_RLIST_F0(b0_reflist[i]) |
+		      G1_REG_BD_REF_PIC_BINIT_RLIST_F1(b0_reflist[i + 1]) |
+		      G1_REG_BD_REF_PIC_BINIT_RLIST_F2(b0_reflist[i + 2]) |
+		      G1_REG_BD_REF_PIC_BINIT_RLIST_B0(b1_reflist[i]) |
+		      G1_REG_BD_REF_PIC_BINIT_RLIST_B1(b1_reflist[i + 1]) |
+		      G1_REG_BD_REF_PIC_BINIT_RLIST_B2(b1_reflist[i + 2]);
+		vdpu_write_relaxed(vpu, reg, G1_REG_BD_REF_PIC(reg_num++));
+	}
+
+	/*
+	 * G1_REG_BD_P_REF_PIC register contains last entries (index 15)
+	 * of forward and backward reference picture lists and first 4 entries
+	 * of P forward picture list.
+	 */
+	reg = G1_REG_BD_P_REF_PIC_BINIT_RLIST_F15(b0_reflist[15]) |
+	      G1_REG_BD_P_REF_PIC_BINIT_RLIST_B15(b1_reflist[15]) |
+	      G1_REG_BD_P_REF_PIC_PINIT_RLIST_F0(p_reflist[0]) |
+	      G1_REG_BD_P_REF_PIC_PINIT_RLIST_F1(p_reflist[1]) |
+	      G1_REG_BD_P_REF_PIC_PINIT_RLIST_F2(p_reflist[2]) |
+	      G1_REG_BD_P_REF_PIC_PINIT_RLIST_F3(p_reflist[3]);
+	vdpu_write_relaxed(vpu, reg, G1_REG_BD_P_REF_PIC);
+
+	/*
+	 * Each G1_REG_FWD_PIC(x) register contains six consecutive
+	 * entries of P forward picture list, starting from index 4.
+	 */
+	reg_num = 0;
+	for (i = 4; i < HANTRO_H264_DPB_SIZE; i += 6) {
+		reg = G1_REG_FWD_PIC_PINIT_RLIST_F0(p_reflist[i]) |
+		      G1_REG_FWD_PIC_PINIT_RLIST_F1(p_reflist[i + 1]) |
+		      G1_REG_FWD_PIC_PINIT_RLIST_F2(p_reflist[i + 2]) |
+		      G1_REG_FWD_PIC_PINIT_RLIST_F3(p_reflist[i + 3]) |
+		      G1_REG_FWD_PIC_PINIT_RLIST_F4(p_reflist[i + 4]) |
+		      G1_REG_FWD_PIC_PINIT_RLIST_F5(p_reflist[i + 5]);
+		vdpu_write_relaxed(vpu, reg, G1_REG_FWD_PIC(reg_num++));
+	}
+
+	/* Set up addresses of DPB buffers. */
+	for (i = 0; i < HANTRO_H264_DPB_SIZE; i++) {
+		struct vb2_buffer *buf =  hantro_h264_get_ref_buf(ctx, i);
+
+		vdpu_write_relaxed(vpu, vb2_dma_contig_plane_dma_addr(buf, 0),
+				   G1_REG_ADDR_REF(i));
+	}
+}
+
+static void set_buffers(struct hantro_ctx *ctx)
+{
+	const struct hantro_h264_dec_ctrls *ctrls = &ctx->h264_dec.ctrls;
+	struct vb2_v4l2_buffer *src_buf, *dst_buf;
+	struct hantro_dev *vpu = ctx->dev;
+	dma_addr_t src_dma, dst_dma;
+
+	src_buf = hantro_get_src_buf(ctx);
+	dst_buf = hantro_get_dst_buf(ctx);
+
+	/* Source (stream) buffer. */
+	src_dma = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
+	vdpu_write_relaxed(vpu, src_dma, G1_REG_ADDR_STR);
+
+	/* Destination (decoded frame) buffer. */
+	dst_dma = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
+	vdpu_write_relaxed(vpu, dst_dma, G1_REG_ADDR_DST);
+
+	/* Higher profiles require DMV buffer appended to reference frames. */
+	if (ctrls->sps->profile_idc > 66) {
+		size_t pic_size = ctx->h264_dec.pic_size;
+		size_t mv_offset = round_up(pic_size, 8);
+
+		if (ctrls->slices[0].flags & V4L2_H264_SLICE_FLAG_BOTTOM_FIELD)
+			mv_offset += 32 * H264_MB_WIDTH(ctx->dst_fmt.width);
+
+		vdpu_write_relaxed(vpu, dst_dma + mv_offset,
+				   G1_REG_ADDR_DIR_MV);
+	}
+
+	/* Auxiliary buffer prepared in hantro_g1_h264_dec_prepare_table(). */
+	vdpu_write_relaxed(vpu, ctx->h264_dec.priv.dma, G1_REG_ADDR_QTABLE);
+}
+
+void hantro_g1_h264_dec_run(struct hantro_ctx *ctx)
+{
+	struct hantro_dev *vpu = ctx->dev;
+
+	/* Prepare the H264 decoder context. */
+	if (hantro_h264_dec_prepare_run(ctx))
+		return;
+
+	/* Configure hardware registers. */
+	set_params(ctx);
+	set_ref(ctx);
+	set_buffers(ctx);
+
+	hantro_finish_run(ctx);
+
+	/* Start decoding! */
+	vdpu_write_relaxed(vpu,
+			   G1_REG_CONFIG_DEC_AXI_RD_ID(0xffu) |
+			   G1_REG_CONFIG_DEC_TIMEOUT_E |
+			   G1_REG_CONFIG_DEC_OUT_ENDIAN |
+			   G1_REG_CONFIG_DEC_STRENDIAN_E |
+			   G1_REG_CONFIG_DEC_MAX_BURST(16) |
+			   G1_REG_CONFIG_DEC_OUTSWAP32_E |
+			   G1_REG_CONFIG_DEC_INSWAP32_E |
+			   G1_REG_CONFIG_DEC_STRSWAP32_E |
+			   G1_REG_CONFIG_DEC_CLK_GATE_E,
+			   G1_REG_CONFIG);
+	vdpu_write(vpu, G1_REG_INTERRUPT_DEC_E, G1_REG_INTERRUPT);
+}
diff --git a/drivers/staging/media/hantro/hantro_hw.h b/drivers/staging/media/hantro/hantro_hw.h
index 75f1ce45a21f..2fab655bf098 100644
--- a/drivers/staging/media/hantro/hantro_hw.h
+++ b/drivers/staging/media/hantro/hantro_hw.h
@@ -161,6 +161,7 @@ void hantro_jpeg_enc_exit(struct hantro_ctx *ctx);
 struct vb2_buffer *hantro_h264_get_ref_buf(struct hantro_ctx *ctx,
 					   unsigned int dpb_idx);
 int hantro_h264_dec_prepare_run(struct hantro_ctx *ctx);
+void hantro_g1_h264_dec_run(struct hantro_ctx *ctx);
 int hantro_h264_dec_init(struct hantro_ctx *ctx);
 void hantro_h264_dec_exit(struct hantro_ctx *ctx);
 
-- 
2.22.0

[PATCH v7 11/11] media: hantro: Enable H264 decoding on rk3288

[Ezequiel Garcia]

From: Hertz Wong <hertz.wong@rock-chips.com>

Now that the generic bits have been added, we can activate H264 decoding
on rk3288.

Signed-off-by: Hertz Wong <hertz.wong@rock-chips.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
---
Changes in v7:
* None.
Changes in v6:
* None.
Changes in v5:
* None.
Changes in v4:
* None.
---
 drivers/staging/media/hantro/rk3288_vpu_hw.c | 21 +++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/media/hantro/rk3288_vpu_hw.c b/drivers/staging/media/hantro/rk3288_vpu_hw.c
index f1b573a006ae..6bfcc47d1e58 100644
--- a/drivers/staging/media/hantro/rk3288_vpu_hw.c
+++ b/drivers/staging/media/hantro/rk3288_vpu_hw.c
@@ -61,6 +61,19 @@ static const struct hantro_fmt rk3288_vpu_dec_fmts[] = {
 		.fourcc = V4L2_PIX_FMT_NV12,
 		.codec_mode = HANTRO_MODE_NONE,
 	},
+	{
+		.fourcc = V4L2_PIX_FMT_H264_SLICE,
+		.codec_mode = HANTRO_MODE_H264_DEC,
+		.max_depth = 2,
+		.frmsize = {
+			.min_width = 48,
+			.max_width = 3840,
+			.step_width = H264_MB_DIM,
+			.min_height = 48,
+			.max_height = 2160,
+			.step_height = H264_MB_DIM,
+		},
+	},
 	{
 		.fourcc = V4L2_PIX_FMT_MPEG2_SLICE,
 		.codec_mode = HANTRO_MODE_MPEG2_DEC,
@@ -162,6 +175,12 @@ static const struct hantro_codec_ops rk3288_vpu_codec_ops[] = {
 		.init = hantro_jpeg_enc_init,
 		.exit = hantro_jpeg_enc_exit,
 	},
+	[HANTRO_MODE_H264_DEC] = {
+		.run = hantro_g1_h264_dec_run,
+		.reset = rk3288_vpu_dec_reset,
+		.init = hantro_h264_dec_init,
+		.exit = hantro_h264_dec_exit,
+	},
 	[HANTRO_MODE_MPEG2_DEC] = {
 		.run = hantro_g1_mpeg2_dec_run,
 		.reset = rk3288_vpu_dec_reset,
@@ -197,7 +216,7 @@ const struct hantro_variant rk3288_vpu_variant = {
 	.dec_fmts = rk3288_vpu_dec_fmts,
 	.num_dec_fmts = ARRAY_SIZE(rk3288_vpu_dec_fmts),
 	.codec = HANTRO_JPEG_ENCODER | HANTRO_MPEG2_DECODER |
-		 HANTRO_VP8_DECODER,
+		 HANTRO_VP8_DECODER | HANTRO_H264_DECODER,
 	.codec_ops = rk3288_vpu_codec_ops,
 	.irqs = rk3288_irqs,
 	.num_irqs = ARRAY_SIZE(rk3288_irqs),
-- 
2.22.0

Re: [PATCH v7 04/11] media: uapi: h264: Add the concept of start code

[Paul Kocialkowski]

[-- Attachment #1: Type: text/plain, Size: 7417 bytes --]

Hi,

On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
> Stateless decoders have different expectations about the
> start code that is prepended on H264 slices. Add a
> menu control to express the supported start code types
> (including no start code).
> 
> Drivers are allowed to support only one start code type,
> but they can support both too.
> 
> Note that this is independent of the H264 decoding mode,
> which specifies the granularity of the decoding operations.
> Either in frame-based or slice-based mode, this new control
> will allow to define the start code expected on H264 slices.

Looks good to me at this point:
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Thanks!

Paul

> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
> ---
> Changes in v7:
> * None.
> Changes in v6:
> * Rename to START_CODE and enum values
>   as suggested by Hand and Paul.
> Changes in v5:
> * Improve specification as suggested by Hans.
> Changes in v4:
> * New patch.
> ---
>  .../media/uapi/v4l/ext-ctrls-codec.rst        | 33 +++++++++++++++++++
>  .../media/uapi/v4l/pixfmt-compressed.rst      |  5 +--
>  drivers/media/v4l2-core/v4l2-ctrls.c          |  9 +++++
>  include/media/h264-ctrls.h                    |  6 ++++
>  4 files changed, 51 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> index 7e7447d9998c..3703c705286f 100644
> --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> @@ -2076,6 +2076,39 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
>          The OUTPUT buffer must contain all slices needed to decode the
>          frame. The OUTPUT buffer must also contain both fields.
>  
> +``V4L2_CID_MPEG_VIDEO_H264_START_CODE (enum)``
> +    Specifies the H264 slice start code expected for each slice.
> +    This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
> +    pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
> +    are required to set this control in order to specify the start code
> +    that is expected for the buffer.
> +    Drivers may expose a single or multiple start codes, depending
> +    on what they can support.
> +
> +    .. note::
> +
> +       This menu control is not yet part of the public kernel API and
> +       it is expected to change.
> +
> +.. c:type:: v4l2_mpeg_video_h264_start_code
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +    :widths:       1 1 2
> +
> +    * - ``V4L2_MPEG_VIDEO_H264_START_CODE_NONE``
> +      - 0
> +      - Selecting this value specifies that H264 slices are passed
> +        to the driver without any start code.
> +    * - ``V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B``
> +      - 1
> +      - Selecting this value specifies that H264 slices are expected
> +        to be prefixed by Annex B start codes. According to :ref:`h264`
> +        valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
> +
>  .. _v4l2-mpeg-mpeg2:
>  
>  ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)``
> diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> index d666eb51741a..493b6020107d 100644
> --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> @@ -60,8 +60,9 @@ Compressed Formats
>  	extracted from the H264 bitstream.  This format is adapted for
>  	stateless video decoders that implement an H264 pipeline
>  	(using the :ref:`mem2mem` and :ref:`media-request-api`).
> -	This pixelformat has a modifier that must be set at least once
> -	through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE`` control.
> +	This pixelformat has two modifiers that must be set at least once
> +	through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE``
> +        and ``V4L2_CID_MPEG_VIDEO_H264_START_CODE`` controls.
>  	In addition, metadata associated with the frame to decode are
>  	required to be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``,
>  	``V4L2_CID_MPEG_VIDEO_H264_PPS``,
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index 2c67f9fc4d5b..1d8f38824631 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -407,6 +407,11 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
>  		"Frame-Based",
>  		NULL,
>  	};
> +	static const char * const h264_start_code[] = {
> +		"No Start Code",
> +		"Annex B Start Code",
> +		NULL,
> +	};
>  	static const char * const mpeg_mpeg2_level[] = {
>  		"Low",
>  		"Main",
> @@ -640,6 +645,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
>  		return h264_fmo_map_type;
>  	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:
>  		return h264_decode_mode;
> +	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:
> +		return h264_start_code;
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
>  		return mpeg_mpeg2_level;
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
> @@ -860,6 +867,7 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS:		return "H264 Slice Parameters";
>  	case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS:		return "H264 Decode Parameters";
>  	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:		return "H264 Decode Mode";
> +	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:		return "H264 Start Code";
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:			return "MPEG2 Level";
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:			return "MPEG2 Profile";
>  	case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:		return "MPEG4 I-Frame QP Value";
> @@ -1229,6 +1237,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  	case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
>  	case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
>  	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:
> +	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
>  	case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
> diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
> index 928c48c57282..ba2876a64cf6 100644
> --- a/include/media/h264-ctrls.h
> +++ b/include/media/h264-ctrls.h
> @@ -27,6 +27,7 @@
>  #define V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS	(V4L2_CID_MPEG_BASE+1003)
>  #define V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS	(V4L2_CID_MPEG_BASE+1004)
>  #define V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE	(V4L2_CID_MPEG_BASE+1005)
> +#define V4L2_CID_MPEG_VIDEO_H264_START_CODE	(V4L2_CID_MPEG_BASE+1006)
>  
>  /* enum v4l2_ctrl_type type values */
>  #define V4L2_CTRL_TYPE_H264_SPS			0x0110
> @@ -40,6 +41,11 @@ enum v4l2_mpeg_video_h264_decode_mode {
>  	V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
>  };
>  
> +enum v4l2_mpeg_video_h264_start_code {
> +	V4L2_MPEG_VIDEO_H264_START_CODE_NONE,
> +	V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
> +};
> +
>  #define V4L2_H264_SPS_CONSTRAINT_SET0_FLAG			0x01
>  #define V4L2_H264_SPS_CONSTRAINT_SET1_FLAG			0x02
>  #define V4L2_H264_SPS_CONSTRAINT_SET2_FLAG			0x04
> -- 
> 2.22.0
> 

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

[-- Attachment #2: signature.asc --]
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Re: [PATCH v7 06/11] media: cedrus: Cleanup control initialization

[Paul Kocialkowski]

[-- Attachment #1: Type: text/plain, Size: 4443 bytes --]

Hi,

On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
> In order to introduce other controls, the control initialization
> needs to support an initial struct v4l2_ctrl_control.
> 
> While here, let's cleanup the control initialization,
> removing unneeded fields.

Thanks for the change!

Acked-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

Cheers,

Paul

> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> ---
> Changes in v7:
> * None.
> Changes in v6:
> * None.
> Changes in v5:
> * None.
> Changes in v4:
> * New patch.
> ---
>  drivers/staging/media/sunxi/cedrus/cedrus.c | 45 +++++++++++----------
>  drivers/staging/media/sunxi/cedrus/cedrus.h |  3 +-
>  2 files changed, 25 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
> index 370937edfc14..7bdc413bf727 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
> @@ -29,44 +29,51 @@
>  
>  static const struct cedrus_control cedrus_controls[] = {
>  	{
> -		.id		= V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
> -		.elem_size	= sizeof(struct v4l2_ctrl_mpeg2_slice_params),
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
> +		},
>  		.codec		= CEDRUS_CODEC_MPEG2,
>  		.required	= true,
>  	},
>  	{
> -		.id		= V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION,
> -		.elem_size	= sizeof(struct v4l2_ctrl_mpeg2_quantization),
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION,
> +		},
>  		.codec		= CEDRUS_CODEC_MPEG2,
>  		.required	= false,
>  	},
>  	{
> -		.id		= V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS,
> -		.elem_size	= sizeof(struct v4l2_ctrl_h264_decode_params),
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS,
> +		},
>  		.codec		= CEDRUS_CODEC_H264,
>  		.required	= true,
>  	},
>  	{
> -		.id		= V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS,
> -		.elem_size	= sizeof(struct v4l2_ctrl_h264_slice_params),
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS,
> +		},
>  		.codec		= CEDRUS_CODEC_H264,
>  		.required	= true,
>  	},
>  	{
> -		.id		= V4L2_CID_MPEG_VIDEO_H264_SPS,
> -		.elem_size	= sizeof(struct v4l2_ctrl_h264_sps),
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_H264_SPS,
> +		},
>  		.codec		= CEDRUS_CODEC_H264,
>  		.required	= true,
>  	},
>  	{
> -		.id		= V4L2_CID_MPEG_VIDEO_H264_PPS,
> -		.elem_size	= sizeof(struct v4l2_ctrl_h264_pps),
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_H264_PPS,
> +		},
>  		.codec		= CEDRUS_CODEC_H264,
>  		.required	= true,
>  	},
>  	{
> -		.id		= V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX,
> -		.elem_size	= sizeof(struct v4l2_ctrl_h264_scaling_matrix),
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX,
> +		},
>  		.codec		= CEDRUS_CODEC_H264,
>  		.required	= true,
>  	},
> @@ -106,12 +113,8 @@ static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx)
>  		return -ENOMEM;
>  
>  	for (i = 0; i < CEDRUS_CONTROLS_COUNT; i++) {
> -		struct v4l2_ctrl_config cfg = {};
> -
> -		cfg.elem_size = cedrus_controls[i].elem_size;
> -		cfg.id = cedrus_controls[i].id;
> -
> -		ctrl = v4l2_ctrl_new_custom(hdl, &cfg, NULL);
> +		ctrl = v4l2_ctrl_new_custom(hdl, &cedrus_controls[i].cfg,
> +					    NULL);
>  		if (hdl->error) {
>  			v4l2_err(&dev->v4l2_dev,
>  				 "Failed to create new custom control\n");
> @@ -178,7 +181,7 @@ static int cedrus_request_validate(struct media_request *req)
>  			continue;
>  
>  		ctrl_test = v4l2_ctrl_request_hdl_ctrl_find(hdl,
> -							    cedrus_controls[i].id);
> +							    cedrus_controls[i].cfg.id);
>  		if (!ctrl_test) {
>  			v4l2_info(&ctx->dev->v4l2_dev,
>  				  "Missing required codec control\n");
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.h b/drivers/staging/media/sunxi/cedrus/cedrus.h
> index d8e6777e5e27..2f017a651848 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.h
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.h
> @@ -49,8 +49,7 @@ enum cedrus_h264_pic_type {
>  };
>  
>  struct cedrus_control {
> -	u32			id;
> -	u32			elem_size;
> +	struct v4l2_ctrl_config cfg;
>  	enum cedrus_codec	codec;
>  	unsigned char		required:1;
>  };
> -- 
> 2.22.0
> 

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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Re: [PATCH v7 02/11] media: uapi: h264: Rename pixel format

[Paul Kocialkowski]

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Hi,

On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
> The V4L2_PIX_FMT_H264_SLICE_RAW name was originally suggested
> because the pixel format would represent H264 slices without any
> start code.
> 
> However, as we will now introduce a start code menu control,
> give the pixel format a more meaningful name, while it's
> still early enough to do so.

I definitely agree that SLICE_RAW is not the suffix we are looking for, but I'm
not sure that _SLICE is self-describing given that we can operate either
per-frame or per-slice, and _SLICE sort of implies the latter. Also, VP8 uses
_FRAME to clearly indicate that it operates per-frame.

In addition, the _SLICE suffix is used by MPEG-2 in the stable API. Since we
certainly want MPEG-2 to allow per-slice and per-frame decoding as well as
H.264 and that the _SLICE format is specified to be the broken "concatenated
slices" that cedrus expects, we probably want to use another suffix. This way,
we could deprecated MPEG2_SLICE and introduce a new format for MPEG-2 that would
have consistent naming with the other mpeg formats.

One suggestion I had was to call it H264_PARSED (and apply this to MPEG-2 and
HEVC when similar controls to H.264 are set in place for them). I think Hans had
another suggestion for the name but I don't recall what it was at this point.

Either way, if this has to be some debate, we could perhaps take it off your
series and stay with SLICE_RAW for now, as long as we do rename it before making
the API stable.

What do you think?

Cheers,

Paul

> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
> ---
> Changes in v7:
> * None.
> Changes in v6:
> * None.
> Changes in v5:
> * None.
> Changes in v4:
> * New patch.
> ---
>  Documentation/media/uapi/v4l/pixfmt-compressed.rst | 4 ++--
>  drivers/media/v4l2-core/v4l2-ioctl.c               | 2 +-
>  drivers/staging/media/sunxi/cedrus/cedrus_dec.c    | 2 +-
>  drivers/staging/media/sunxi/cedrus/cedrus_video.c  | 6 +++---
>  include/media/h264-ctrls.h                         | 2 +-
>  5 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> index f52a7b67023d..9b65473a2288 100644
> --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> @@ -52,9 +52,9 @@ Compressed Formats
>        - ``V4L2_PIX_FMT_H264_MVC``
>        - 'M264'
>        - H264 MVC video elementary stream.
> -    * .. _V4L2-PIX-FMT-H264-SLICE-RAW:
> +    * .. _V4L2-PIX-FMT-H264-SLICE:
>  
> -      - ``V4L2_PIX_FMT_H264_SLICE_RAW``
> +      - ``V4L2_PIX_FMT_H264_SLICE``
>        - 'S264'
>        - H264 parsed slice data, without the start code and as
>  	extracted from the H264 bitstream.  This format is adapted for
> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> index bb5b4926538a..39f10621c91b 100644
> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> @@ -1343,7 +1343,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>  		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
>  		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
>  		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
> -		case V4L2_PIX_FMT_H264_SLICE_RAW:	descr = "H.264 Parsed Slice Data"; break;
> +		case V4L2_PIX_FMT_H264_SLICE:	descr = "H.264 Parsed Slice Data"; break;
>  		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
>  		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
>  		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> index bdad87eb9d79..56ca4c9ad01c 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> @@ -46,7 +46,7 @@ void cedrus_device_run(void *priv)
>  			V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION);
>  		break;
>  
> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
> +	case V4L2_PIX_FMT_H264_SLICE:
>  		run.h264.decode_params = cedrus_find_control_data(ctx,
>  			V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS);
>  		run.h264.pps = cedrus_find_control_data(ctx,
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> index 681dfe3367a6..eeee3efd247b 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> @@ -38,7 +38,7 @@ static struct cedrus_format cedrus_formats[] = {
>  		.directions	= CEDRUS_DECODE_SRC,
>  	},
>  	{
> -		.pixelformat	= V4L2_PIX_FMT_H264_SLICE_RAW,
> +		.pixelformat	= V4L2_PIX_FMT_H264_SLICE,
>  		.directions	= CEDRUS_DECODE_SRC,
>  	},
>  	{
> @@ -104,7 +104,7 @@ static void cedrus_prepare_format(struct v4l2_pix_format *pix_fmt)
>  
>  	switch (pix_fmt->pixelformat) {
>  	case V4L2_PIX_FMT_MPEG2_SLICE:
> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
> +	case V4L2_PIX_FMT_H264_SLICE:
>  		/* Zero bytes per line for encoded source. */
>  		bytesperline = 0;
>  
> @@ -449,7 +449,7 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count)
>  		ctx->current_codec = CEDRUS_CODEC_MPEG2;
>  		break;
>  
> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
> +	case V4L2_PIX_FMT_H264_SLICE:
>  		ctx->current_codec = CEDRUS_CODEC_H264;
>  		break;
>  
> diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
> index e1404d78d6ff..6160a69c0143 100644
> --- a/include/media/h264-ctrls.h
> +++ b/include/media/h264-ctrls.h
> @@ -14,7 +14,7 @@
>  #include <linux/videodev2.h>
>  
>  /* Our pixel format isn't stable at the moment */
> -#define V4L2_PIX_FMT_H264_SLICE_RAW v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
> +#define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
>  
>  /*
>   * This is put insanely high to avoid conflicting with controls that
> -- 
> 2.22.0
> 

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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Re: [PATCH v7 02/11] media: uapi: h264: Rename pixel format

[Ezequiel Garcia]

On Mon, 2019-08-19 at 14:41 +0200, Paul Kocialkowski wrote:
> Hi,
> 
> On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
> > The V4L2_PIX_FMT_H264_SLICE_RAW name was originally suggested
> > because the pixel format would represent H264 slices without any
> > start code.
> > 
> > However, as we will now introduce a start code menu control,
> > give the pixel format a more meaningful name, while it's
> > still early enough to do so.
> 
> I definitely agree that SLICE_RAW is not the suffix we are looking for, but I'm
> not sure that _SLICE is self-describing given that we can operate either
> per-frame or per-slice, and _SLICE sort of implies the latter.

This is not entirely so, per-frame or per-slice mode refer to the granularity
of the stateless API, the pixel format is still composed of H264 NALU slices.

As per the documentation, the decode_mode and the start_code are modifiers
of the pixel format. As long as this is properly speced, the
V4L2_PIX_FMT_H264_SLICE looks pretty OK to me.

>  Also, VP8 uses
> _FRAME to clearly indicate that it operates per-frame.
> 

This is because VP8 doesn't have any concept of slices, the encoded unit
is a video frame.

> In addition, the _SLICE suffix is used by MPEG-2 in the stable API. Since we
> certainly want MPEG-2 to allow per-slice and per-frame decoding as well as
> H.264 and that the _SLICE format is specified to be the broken "concatenated
> slices" that cedrus expects, we probably want to use another suffix. This way,
> we could deprecated MPEG2_SLICE and introduce a new format for MPEG-2 that would
> have consistent naming with the other mpeg formats.
> 
> One suggestion I had was to call it H264_PARSED (and apply this to MPEG-2 and
> HEVC when similar controls to H.264 are set in place for them). I think Hans had
> another suggestion for the name but I don't recall what it was at this point.
> 
> Either way, if this has to be some debate, we could perhaps take it off your
> series and stay with SLICE_RAW for now, as long as we do rename it before making
> the API stable.
> 
> What do you think?
> 

With the new pixel format modifiers (decode_mode and start_code), the _RAW suffix
now has no meaning. Now, we could name it _PARSED or _SLICE. As long as this is
properly documented (as it is now), that'd be fine.

Now, to be completely honest, this discussion sounds like
bikeshedding to me.

Thanks,
Eze

Re: [PATCH v7 02/11] media: uapi: h264: Rename pixel format

[Hans Verkuil]

On 8/19/19 2:41 PM, Paul Kocialkowski wrote:
> Hi,
> 
> On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
>> The V4L2_PIX_FMT_H264_SLICE_RAW name was originally suggested
>> because the pixel format would represent H264 slices without any
>> start code.
>>
>> However, as we will now introduce a start code menu control,
>> give the pixel format a more meaningful name, while it's
>> still early enough to do so.
> 
> I definitely agree that SLICE_RAW is not the suffix we are looking for, but I'm
> not sure that _SLICE is self-describing given that we can operate either
> per-frame or per-slice, and _SLICE sort of implies the latter. Also, VP8 uses
> _FRAME to clearly indicate that it operates per-frame.

Well, VP8 doesn't support slices at all.

> 
> In addition, the _SLICE suffix is used by MPEG-2 in the stable API. Since we

Regarding MPEG-2: while it has a concept of slices, it is my understanding
that you never process slices separately, but only full pictures. I may be
wrong here.

> certainly want MPEG-2 to allow per-slice and per-frame decoding as well as
> H.264 and that the _SLICE format is specified to be the broken "concatenated
> slices" that cedrus expects, we probably want to use another suffix. This way,
> we could deprecated MPEG2_SLICE and introduce a new format for MPEG-2 that would
> have consistent naming with the other mpeg formats.

I actually think that H264_SLICE is a decent name.

I'm less sure about MPEG2_SLICE since I am not sure if it means the same as
a H264 slice.

> 
> One suggestion I had was to call it H264_PARSED (and apply this to MPEG-2 and
> HEVC when similar controls to H.264 are set in place for them). I think Hans had
> another suggestion for the name but I don't recall what it was at this point.

I can't remember it either. In any case, I'm not that keen on _PARSED.

I think for H264 and HEVC the _SLICE suffix is good enough.

Regards,

	Hans

> 
> Either way, if this has to be some debate, we could perhaps take it off your
> series and stay with SLICE_RAW for now, as long as we do rename it before making
> the API stable.
> 
> What do you think?
> 
> Cheers,
> 
> Paul
> 
>> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
>> Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
>> ---
>> Changes in v7:
>> * None.
>> Changes in v6:
>> * None.
>> Changes in v5:
>> * None.
>> Changes in v4:
>> * New patch.
>> ---
>>  Documentation/media/uapi/v4l/pixfmt-compressed.rst | 4 ++--
>>  drivers/media/v4l2-core/v4l2-ioctl.c               | 2 +-
>>  drivers/staging/media/sunxi/cedrus/cedrus_dec.c    | 2 +-
>>  drivers/staging/media/sunxi/cedrus/cedrus_video.c  | 6 +++---
>>  include/media/h264-ctrls.h                         | 2 +-
>>  5 files changed, 8 insertions(+), 8 deletions(-)
>>
>> diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>> index f52a7b67023d..9b65473a2288 100644
>> --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>> +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>> @@ -52,9 +52,9 @@ Compressed Formats
>>        - ``V4L2_PIX_FMT_H264_MVC``
>>        - 'M264'
>>        - H264 MVC video elementary stream.
>> -    * .. _V4L2-PIX-FMT-H264-SLICE-RAW:
>> +    * .. _V4L2-PIX-FMT-H264-SLICE:
>>  
>> -      - ``V4L2_PIX_FMT_H264_SLICE_RAW``
>> +      - ``V4L2_PIX_FMT_H264_SLICE``
>>        - 'S264'
>>        - H264 parsed slice data, without the start code and as
>>  	extracted from the H264 bitstream.  This format is adapted for
>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
>> index bb5b4926538a..39f10621c91b 100644
>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
>> @@ -1343,7 +1343,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>>  		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
>>  		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
>>  		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
>> -		case V4L2_PIX_FMT_H264_SLICE_RAW:	descr = "H.264 Parsed Slice Data"; break;
>> +		case V4L2_PIX_FMT_H264_SLICE:	descr = "H.264 Parsed Slice Data"; break;
>>  		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
>>  		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
>>  		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
>> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
>> index bdad87eb9d79..56ca4c9ad01c 100644
>> --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
>> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
>> @@ -46,7 +46,7 @@ void cedrus_device_run(void *priv)
>>  			V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION);
>>  		break;
>>  
>> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
>> +	case V4L2_PIX_FMT_H264_SLICE:
>>  		run.h264.decode_params = cedrus_find_control_data(ctx,
>>  			V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS);
>>  		run.h264.pps = cedrus_find_control_data(ctx,
>> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
>> index 681dfe3367a6..eeee3efd247b 100644
>> --- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
>> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
>> @@ -38,7 +38,7 @@ static struct cedrus_format cedrus_formats[] = {
>>  		.directions	= CEDRUS_DECODE_SRC,
>>  	},
>>  	{
>> -		.pixelformat	= V4L2_PIX_FMT_H264_SLICE_RAW,
>> +		.pixelformat	= V4L2_PIX_FMT_H264_SLICE,
>>  		.directions	= CEDRUS_DECODE_SRC,
>>  	},
>>  	{
>> @@ -104,7 +104,7 @@ static void cedrus_prepare_format(struct v4l2_pix_format *pix_fmt)
>>  
>>  	switch (pix_fmt->pixelformat) {
>>  	case V4L2_PIX_FMT_MPEG2_SLICE:
>> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
>> +	case V4L2_PIX_FMT_H264_SLICE:
>>  		/* Zero bytes per line for encoded source. */
>>  		bytesperline = 0;
>>  
>> @@ -449,7 +449,7 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count)
>>  		ctx->current_codec = CEDRUS_CODEC_MPEG2;
>>  		break;
>>  
>> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
>> +	case V4L2_PIX_FMT_H264_SLICE:
>>  		ctx->current_codec = CEDRUS_CODEC_H264;
>>  		break;
>>  
>> diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
>> index e1404d78d6ff..6160a69c0143 100644
>> --- a/include/media/h264-ctrls.h
>> +++ b/include/media/h264-ctrls.h
>> @@ -14,7 +14,7 @@
>>  #include <linux/videodev2.h>
>>  
>>  /* Our pixel format isn't stable at the moment */
>> -#define V4L2_PIX_FMT_H264_SLICE_RAW v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
>> +#define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
>>  
>>  /*
>>   * This is put insanely high to avoid conflicting with controls that
>> -- 
>> 2.22.0
>>
> 

Re: [PATCH v7 02/11] media: uapi: h264: Rename pixel format

[Paul Kocialkowski]

[-- Attachment #1: Type: text/plain, Size: 8496 bytes --]

Hi,

On Mon 19 Aug 19, 17:53, Hans Verkuil wrote:
> On 8/19/19 2:41 PM, Paul Kocialkowski wrote:
> > Hi,
> > 
> > On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
> >> The V4L2_PIX_FMT_H264_SLICE_RAW name was originally suggested
> >> because the pixel format would represent H264 slices without any
> >> start code.
> >>
> >> However, as we will now introduce a start code menu control,
> >> give the pixel format a more meaningful name, while it's
> >> still early enough to do so.
> > 
> > I definitely agree that SLICE_RAW is not the suffix we are looking for, but I'm
> > not sure that _SLICE is self-describing given that we can operate either
> > per-frame or per-slice, and _SLICE sort of implies the latter. Also, VP8 uses
> > _FRAME to clearly indicate that it operates per-frame.
> 
> Well, VP8 doesn't support slices at all.
> 
> > 
> > In addition, the _SLICE suffix is used by MPEG-2 in the stable API. Since we
> 
> Regarding MPEG-2: while it has a concept of slices, it is my understanding
> that you never process slices separately, but only full pictures. I may be
> wrong here.

I don't think that is the case since ffmpeg clearly implements decoding on a
per-slice basis (mpeg_decode_slice).

Information is also passed on a per-slice basis to VAAPI 
(vaapi_mpeg2_decode_slice) with a distinct data buffer and slice parameter
buffer for each slice. Among other things, it contains the vertical and
horizontal positions for the slice, which we can set in the hardware.

> > certainly want MPEG-2 to allow per-slice and per-frame decoding as well as
> > H.264 and that the _SLICE format is specified to be the broken "concatenated
> > slices" that cedrus expects, we probably want to use another suffix. This way,
> > we could deprecated MPEG2_SLICE and introduce a new format for MPEG-2 that would
> > have consistent naming with the other mpeg formats.
> 
> I actually think that H264_SLICE is a decent name.
> 
> I'm less sure about MPEG2_SLICE since I am not sure if it means the same as
> a H264 slice.

The main problem I see is that we have already specified MPEG2_SLICE in a way
that is incompatible with the future improvments we want to bring to the API:
" The output buffer must contain the appropriate number of macroblocks to
decode a full corresponding frame to the matching capture buffer."

So I only see two possibilities: either we decide to change the specification
of the pixel format and we can keep using the _SLICE suffix, either we need to
introduce a new pixel format with another suffix, which should also be reflected
on other MPEG formats for consistency. Then we can deprecate MPEG2_SLICE and
have drivers stop using it.

What do you think?

Cheers,

Paul

> > One suggestion I had was to call it H264_PARSED (and apply this to MPEG-2 and
> > HEVC when similar controls to H.264 are set in place for them). I think Hans had
> > another suggestion for the name but I don't recall what it was at this point.
> 
> I can't remember it either. In any case, I'm not that keen on _PARSED.
> 
> I think for H264 and HEVC the _SLICE suffix is good enough.
> 
> Regards,
> 
> 	Hans
> 
> > 
> > Either way, if this has to be some debate, we could perhaps take it off your
> > series and stay with SLICE_RAW for now, as long as we do rename it before making
> > the API stable.
> > 
> > What do you think?
> > 
> > Cheers,
> > 
> > Paul
> > 
> >> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> >> Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
> >> ---
> >> Changes in v7:
> >> * None.
> >> Changes in v6:
> >> * None.
> >> Changes in v5:
> >> * None.
> >> Changes in v4:
> >> * New patch.
> >> ---
> >>  Documentation/media/uapi/v4l/pixfmt-compressed.rst | 4 ++--
> >>  drivers/media/v4l2-core/v4l2-ioctl.c               | 2 +-
> >>  drivers/staging/media/sunxi/cedrus/cedrus_dec.c    | 2 +-
> >>  drivers/staging/media/sunxi/cedrus/cedrus_video.c  | 6 +++---
> >>  include/media/h264-ctrls.h                         | 2 +-
> >>  5 files changed, 8 insertions(+), 8 deletions(-)
> >>
> >> diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> >> index f52a7b67023d..9b65473a2288 100644
> >> --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> >> +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> >> @@ -52,9 +52,9 @@ Compressed Formats
> >>        - ``V4L2_PIX_FMT_H264_MVC``
> >>        - 'M264'
> >>        - H264 MVC video elementary stream.
> >> -    * .. _V4L2-PIX-FMT-H264-SLICE-RAW:
> >> +    * .. _V4L2-PIX-FMT-H264-SLICE:
> >>  
> >> -      - ``V4L2_PIX_FMT_H264_SLICE_RAW``
> >> +      - ``V4L2_PIX_FMT_H264_SLICE``
> >>        - 'S264'
> >>        - H264 parsed slice data, without the start code and as
> >>  	extracted from the H264 bitstream.  This format is adapted for
> >> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
> >> index bb5b4926538a..39f10621c91b 100644
> >> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
> >> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
> >> @@ -1343,7 +1343,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
> >>  		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
> >>  		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
> >>  		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
> >> -		case V4L2_PIX_FMT_H264_SLICE_RAW:	descr = "H.264 Parsed Slice Data"; break;
> >> +		case V4L2_PIX_FMT_H264_SLICE:	descr = "H.264 Parsed Slice Data"; break;
> >>  		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
> >>  		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
> >>  		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
> >> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> >> index bdad87eb9d79..56ca4c9ad01c 100644
> >> --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> >> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> >> @@ -46,7 +46,7 @@ void cedrus_device_run(void *priv)
> >>  			V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION);
> >>  		break;
> >>  
> >> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
> >> +	case V4L2_PIX_FMT_H264_SLICE:
> >>  		run.h264.decode_params = cedrus_find_control_data(ctx,
> >>  			V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS);
> >>  		run.h264.pps = cedrus_find_control_data(ctx,
> >> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> >> index 681dfe3367a6..eeee3efd247b 100644
> >> --- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> >> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> >> @@ -38,7 +38,7 @@ static struct cedrus_format cedrus_formats[] = {
> >>  		.directions	= CEDRUS_DECODE_SRC,
> >>  	},
> >>  	{
> >> -		.pixelformat	= V4L2_PIX_FMT_H264_SLICE_RAW,
> >> +		.pixelformat	= V4L2_PIX_FMT_H264_SLICE,
> >>  		.directions	= CEDRUS_DECODE_SRC,
> >>  	},
> >>  	{
> >> @@ -104,7 +104,7 @@ static void cedrus_prepare_format(struct v4l2_pix_format *pix_fmt)
> >>  
> >>  	switch (pix_fmt->pixelformat) {
> >>  	case V4L2_PIX_FMT_MPEG2_SLICE:
> >> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
> >> +	case V4L2_PIX_FMT_H264_SLICE:
> >>  		/* Zero bytes per line for encoded source. */
> >>  		bytesperline = 0;
> >>  
> >> @@ -449,7 +449,7 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count)
> >>  		ctx->current_codec = CEDRUS_CODEC_MPEG2;
> >>  		break;
> >>  
> >> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
> >> +	case V4L2_PIX_FMT_H264_SLICE:
> >>  		ctx->current_codec = CEDRUS_CODEC_H264;
> >>  		break;
> >>  
> >> diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
> >> index e1404d78d6ff..6160a69c0143 100644
> >> --- a/include/media/h264-ctrls.h
> >> +++ b/include/media/h264-ctrls.h
> >> @@ -14,7 +14,7 @@
> >>  #include <linux/videodev2.h>
> >>  
> >>  /* Our pixel format isn't stable at the moment */
> >> -#define V4L2_PIX_FMT_H264_SLICE_RAW v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
> >> +#define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
> >>  
> >>  /*
> >>   * This is put insanely high to avoid conflicting with controls that
> >> -- 
> >> 2.22.0
> >>
> > 
> 

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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Re: [PATCH v7 07/11] media: cedrus: Specify H264 startcode and decoding mode

[Paul Kocialkowski]

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Hi,

On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
> The cedrus VPU is slice-based and expects V4L2_PIX_FMT_H264_SLICE
> buffers to contain H264 slices with no start code.

For clarification, cedrus does not expect any of the two options we have
specified but something in-between that is rather broken (a single frame
composed of a single slice only, in the format that our userspace currently
fills).

So at this point, the uAPI is not yet harmonized across cedrus and hantro
although the new controls from this series are exposed on both.

This situation makes me realize that perhaps we should have a formal discussion
on the roadmap we want to take for stabilizing the API. I see many points that
need significant adjustments and the new controls that allow Rockchip support
are just one aspect.

Having both drivers abide by the API seems like the next logical step (as far
as I understood, this is what Hans is expecting now), but I want to stress the
fact that it is really not enough to make a proper API and things are still
pretty broken all around.

Cheers,

Paul 

> Expose this to userspace with the newly added menu control.
> 
> These two controls are specified as mandatory for applications,
> but we mark them as non-required on the driver side for
> backwards compatibility.
> 
> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> ---
> Changes in v7:
> * None.
> Changes in v6:
> * Remove incorrect menu_skip_mask.
> Changes in v6:
> * Adjust to control renames.
> Changes in v5:
> * Clarify commit log.
> Changes in v4:
> * New patch.
> ---
>  drivers/staging/media/sunxi/cedrus/cedrus.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
> index 7bdc413bf727..2d3ea8b74dfd 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
> @@ -77,6 +77,24 @@ static const struct cedrus_control cedrus_controls[] = {
>  		.codec		= CEDRUS_CODEC_H264,
>  		.required	= true,
>  	},
> +	{
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE,
> +			.max	= V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED,
> +			.def	= V4L2_MPEG_VIDEO_H264_DECODE_MODE_SLICE_BASED,
> +		},
> +		.codec		= CEDRUS_CODEC_H264,
> +		.required	= false,
> +	},
> +	{
> +		.cfg = {
> +			.id	= V4L2_CID_MPEG_VIDEO_H264_START_CODE,
> +			.max	= V4L2_MPEG_VIDEO_H264_START_CODE_NONE,
> +			.def	= V4L2_MPEG_VIDEO_H264_START_CODE_NONE,
> +		},
> +		.codec		= CEDRUS_CODEC_H264,
> +		.required	= false,
> +	},
>  };
>  
>  #define CEDRUS_CONTROLS_COUNT	ARRAY_SIZE(cedrus_controls)
> -- 
> 2.22.0
> 

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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Re: [PATCH v7 02/11] media: uapi: h264: Rename pixel format

[Hans Verkuil]

On 8/22/19 1:54 PM, Paul Kocialkowski wrote:
> Hi,
> 
> On Mon 19 Aug 19, 17:53, Hans Verkuil wrote:
>> On 8/19/19 2:41 PM, Paul Kocialkowski wrote:
>>> Hi,
>>>
>>> On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
>>>> The V4L2_PIX_FMT_H264_SLICE_RAW name was originally suggested
>>>> because the pixel format would represent H264 slices without any
>>>> start code.
>>>>
>>>> However, as we will now introduce a start code menu control,
>>>> give the pixel format a more meaningful name, while it's
>>>> still early enough to do so.
>>>
>>> I definitely agree that SLICE_RAW is not the suffix we are looking for, but I'm
>>> not sure that _SLICE is self-describing given that we can operate either
>>> per-frame or per-slice, and _SLICE sort of implies the latter. Also, VP8 uses
>>> _FRAME to clearly indicate that it operates per-frame.
>>
>> Well, VP8 doesn't support slices at all.
>>
>>>
>>> In addition, the _SLICE suffix is used by MPEG-2 in the stable API. Since we
>>
>> Regarding MPEG-2: while it has a concept of slices, it is my understanding
>> that you never process slices separately, but only full pictures. I may be
>> wrong here.
> 
> I don't think that is the case since ffmpeg clearly implements decoding on a
> per-slice basis (mpeg_decode_slice).
> 
> Information is also passed on a per-slice basis to VAAPI 
> (vaapi_mpeg2_decode_slice) with a distinct data buffer and slice parameter
> buffer for each slice. Among other things, it contains the vertical and
> horizontal positions for the slice, which we can set in the hardware.
> 
>>> certainly want MPEG-2 to allow per-slice and per-frame decoding as well as
>>> H.264 and that the _SLICE format is specified to be the broken "concatenated
>>> slices" that cedrus expects, we probably want to use another suffix. This way,
>>> we could deprecated MPEG2_SLICE and introduce a new format for MPEG-2 that would
>>> have consistent naming with the other mpeg formats.
>>
>> I actually think that H264_SLICE is a decent name.
>>
>> I'm less sure about MPEG2_SLICE since I am not sure if it means the same as
>> a H264 slice.
> 
> The main problem I see is that we have already specified MPEG2_SLICE in a way
> that is incompatible with the future improvments we want to bring to the API:
> " The output buffer must contain the appropriate number of macroblocks to
> decode a full corresponding frame to the matching capture buffer."
> 
> So I only see two possibilities: either we decide to change the specification
> of the pixel format and we can keep using the _SLICE suffix, either we need to
> introduce a new pixel format with another suffix, which should also be reflected
> on other MPEG formats for consistency. Then we can deprecate MPEG2_SLICE and
> have drivers stop using it.
> 
> What do you think?

I'd change the specification of the pixel format. So MPEG2_SLICE now supports
multiple slices if the hardware supports it as well.

We would need an MPEG2_DECODING_MODE control as well, that currently would
read FRAME based only.

Regards,

	Hans

> 
> Cheers,
> 
> Paul
> 
>>> One suggestion I had was to call it H264_PARSED (and apply this to MPEG-2 and
>>> HEVC when similar controls to H.264 are set in place for them). I think Hans had
>>> another suggestion for the name but I don't recall what it was at this point.
>>
>> I can't remember it either. In any case, I'm not that keen on _PARSED.
>>
>> I think for H264 and HEVC the _SLICE suffix is good enough.
>>
>> Regards,
>>
>> 	Hans
>>
>>>
>>> Either way, if this has to be some debate, we could perhaps take it off your
>>> series and stay with SLICE_RAW for now, as long as we do rename it before making
>>> the API stable.
>>>
>>> What do you think?
>>>
>>> Cheers,
>>>
>>> Paul
>>>
>>>> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
>>>> Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
>>>> ---
>>>> Changes in v7:
>>>> * None.
>>>> Changes in v6:
>>>> * None.
>>>> Changes in v5:
>>>> * None.
>>>> Changes in v4:
>>>> * New patch.
>>>> ---
>>>>  Documentation/media/uapi/v4l/pixfmt-compressed.rst | 4 ++--
>>>>  drivers/media/v4l2-core/v4l2-ioctl.c               | 2 +-
>>>>  drivers/staging/media/sunxi/cedrus/cedrus_dec.c    | 2 +-
>>>>  drivers/staging/media/sunxi/cedrus/cedrus_video.c  | 6 +++---
>>>>  include/media/h264-ctrls.h                         | 2 +-
>>>>  5 files changed, 8 insertions(+), 8 deletions(-)
>>>>
>>>> diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>>>> index f52a7b67023d..9b65473a2288 100644
>>>> --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>>>> +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
>>>> @@ -52,9 +52,9 @@ Compressed Formats
>>>>        - ``V4L2_PIX_FMT_H264_MVC``
>>>>        - 'M264'
>>>>        - H264 MVC video elementary stream.
>>>> -    * .. _V4L2-PIX-FMT-H264-SLICE-RAW:
>>>> +    * .. _V4L2-PIX-FMT-H264-SLICE:
>>>>  
>>>> -      - ``V4L2_PIX_FMT_H264_SLICE_RAW``
>>>> +      - ``V4L2_PIX_FMT_H264_SLICE``
>>>>        - 'S264'
>>>>        - H264 parsed slice data, without the start code and as
>>>>  	extracted from the H264 bitstream.  This format is adapted for
>>>> diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
>>>> index bb5b4926538a..39f10621c91b 100644
>>>> --- a/drivers/media/v4l2-core/v4l2-ioctl.c
>>>> +++ b/drivers/media/v4l2-core/v4l2-ioctl.c
>>>> @@ -1343,7 +1343,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
>>>>  		case V4L2_PIX_FMT_H264:		descr = "H.264"; break;
>>>>  		case V4L2_PIX_FMT_H264_NO_SC:	descr = "H.264 (No Start Codes)"; break;
>>>>  		case V4L2_PIX_FMT_H264_MVC:	descr = "H.264 MVC"; break;
>>>> -		case V4L2_PIX_FMT_H264_SLICE_RAW:	descr = "H.264 Parsed Slice Data"; break;
>>>> +		case V4L2_PIX_FMT_H264_SLICE:	descr = "H.264 Parsed Slice Data"; break;
>>>>  		case V4L2_PIX_FMT_H263:		descr = "H.263"; break;
>>>>  		case V4L2_PIX_FMT_MPEG1:	descr = "MPEG-1 ES"; break;
>>>>  		case V4L2_PIX_FMT_MPEG2:	descr = "MPEG-2 ES"; break;
>>>> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
>>>> index bdad87eb9d79..56ca4c9ad01c 100644
>>>> --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
>>>> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
>>>> @@ -46,7 +46,7 @@ void cedrus_device_run(void *priv)
>>>>  			V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION);
>>>>  		break;
>>>>  
>>>> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
>>>> +	case V4L2_PIX_FMT_H264_SLICE:
>>>>  		run.h264.decode_params = cedrus_find_control_data(ctx,
>>>>  			V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS);
>>>>  		run.h264.pps = cedrus_find_control_data(ctx,
>>>> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
>>>> index 681dfe3367a6..eeee3efd247b 100644
>>>> --- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
>>>> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
>>>> @@ -38,7 +38,7 @@ static struct cedrus_format cedrus_formats[] = {
>>>>  		.directions	= CEDRUS_DECODE_SRC,
>>>>  	},
>>>>  	{
>>>> -		.pixelformat	= V4L2_PIX_FMT_H264_SLICE_RAW,
>>>> +		.pixelformat	= V4L2_PIX_FMT_H264_SLICE,
>>>>  		.directions	= CEDRUS_DECODE_SRC,
>>>>  	},
>>>>  	{
>>>> @@ -104,7 +104,7 @@ static void cedrus_prepare_format(struct v4l2_pix_format *pix_fmt)
>>>>  
>>>>  	switch (pix_fmt->pixelformat) {
>>>>  	case V4L2_PIX_FMT_MPEG2_SLICE:
>>>> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
>>>> +	case V4L2_PIX_FMT_H264_SLICE:
>>>>  		/* Zero bytes per line for encoded source. */
>>>>  		bytesperline = 0;
>>>>  
>>>> @@ -449,7 +449,7 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count)
>>>>  		ctx->current_codec = CEDRUS_CODEC_MPEG2;
>>>>  		break;
>>>>  
>>>> -	case V4L2_PIX_FMT_H264_SLICE_RAW:
>>>> +	case V4L2_PIX_FMT_H264_SLICE:
>>>>  		ctx->current_codec = CEDRUS_CODEC_H264;
>>>>  		break;
>>>>  
>>>> diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
>>>> index e1404d78d6ff..6160a69c0143 100644
>>>> --- a/include/media/h264-ctrls.h
>>>> +++ b/include/media/h264-ctrls.h
>>>> @@ -14,7 +14,7 @@
>>>>  #include <linux/videodev2.h>
>>>>  
>>>>  /* Our pixel format isn't stable at the moment */
>>>> -#define V4L2_PIX_FMT_H264_SLICE_RAW v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
>>>> +#define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */
>>>>  
>>>>  /*
>>>>   * This is put insanely high to avoid conflicting with controls that
>>>> -- 
>>>> 2.22.0
>>>>
>>>
>>
> 

Re: [PATCH v7 02/11] media: uapi: h264: Rename pixel format

[Ezequiel Garcia]

On Thu, 2019-08-22 at 15:47 +0200, Hans Verkuil wrote:
> On 8/22/19 1:54 PM, Paul Kocialkowski wrote:
> > Hi,
> > 
> > On Mon 19 Aug 19, 17:53, Hans Verkuil wrote:
> > > On 8/19/19 2:41 PM, Paul Kocialkowski wrote:
> > > > Hi,
> > > > 
> > > > On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
> > > > > The V4L2_PIX_FMT_H264_SLICE_RAW name was originally suggested
> > > > > because the pixel format would represent H264 slices without any
> > > > > start code.
> > > > > 
> > > > > However, as we will now introduce a start code menu control,
> > > > > give the pixel format a more meaningful name, while it's
> > > > > still early enough to do so.
> > > > 
> > > > I definitely agree that SLICE_RAW is not the suffix we are looking for, but I'm
> > > > not sure that _SLICE is self-describing given that we can operate either
> > > > per-frame or per-slice, and _SLICE sort of implies the latter. Also, VP8 uses
> > > > _FRAME to clearly indicate that it operates per-frame.
> > > 
> > > Well, VP8 doesn't support slices at all.
> > > 
> > > > In addition, the _SLICE suffix is used by MPEG-2 in the stable API. Since we
> > > 
> > > Regarding MPEG-2: while it has a concept of slices, it is my understanding
> > > that you never process slices separately, but only full pictures. I may be
> > > wrong here.
> > 
> > I don't think that is the case since ffmpeg clearly implements decoding on a
> > per-slice basis (mpeg_decode_slice).
> > 
> > Information is also passed on a per-slice basis to VAAPI 
> > (vaapi_mpeg2_decode_slice) with a distinct data buffer and slice parameter
> > buffer for each slice. Among other things, it contains the vertical and
> > horizontal positions for the slice, which we can set in the hardware.
> > 
> > > > certainly want MPEG-2 to allow per-slice and per-frame decoding as well as
> > > > H.264 and that the _SLICE format is specified to be the broken "concatenated
> > > > slices" that cedrus expects, we probably want to use another suffix. This way,
> > > > we could deprecated MPEG2_SLICE and introduce a new format for MPEG-2 that would
> > > > have consistent naming with the other mpeg formats.
> > > 
> > > I actually think that H264_SLICE is a decent name.
> > > 
> > > I'm less sure about MPEG2_SLICE since I am not sure if it means the same as
> > > a H264 slice.
> > 
> > The main problem I see is that we have already specified MPEG2_SLICE in a way
> > that is incompatible with the future improvments we want to bring to the API:
> > " The output buffer must contain the appropriate number of macroblocks to
> > decode a full corresponding frame to the matching capture buffer."
> > 
> > So I only see two possibilities: either we decide to change the specification
> > of the pixel format and we can keep using the _SLICE suffix, either we need to
> > introduce a new pixel format with another suffix, which should also be reflected
> > on other MPEG formats for consistency. Then we can deprecate MPEG2_SLICE and
> > have drivers stop using it.
> > 
> > What do you think?
> 
> I'd change the specification of the pixel format. So MPEG2_SLICE now supports
> multiple slices if the hardware supports it as well.
> 
> We would need an MPEG2_DECODING_MODE control as well, that currently would
> read FRAME based only.
> 

That's exactly what I was about to suggest.

Regards,
Ezequiel

Re: [PATCH v7 02/11] media: uapi: h264: Rename pixel format

[Paul Kocialkowski]

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Hi,

On Thu 22 Aug 19, 11:38, Ezequiel Garcia wrote:
> On Thu, 2019-08-22 at 15:47 +0200, Hans Verkuil wrote:
> > On 8/22/19 1:54 PM, Paul Kocialkowski wrote:
> > > Hi,
> > > 
> > > On Mon 19 Aug 19, 17:53, Hans Verkuil wrote:
> > > > On 8/19/19 2:41 PM, Paul Kocialkowski wrote:
> > > > > Hi,
> > > > > 
> > > > > On Fri 16 Aug 19, 13:01, Ezequiel Garcia wrote:
> > > > > > The V4L2_PIX_FMT_H264_SLICE_RAW name was originally suggested
> > > > > > because the pixel format would represent H264 slices without any
> > > > > > start code.
> > > > > > 
> > > > > > However, as we will now introduce a start code menu control,
> > > > > > give the pixel format a more meaningful name, while it's
> > > > > > still early enough to do so.
> > > > > 
> > > > > I definitely agree that SLICE_RAW is not the suffix we are looking for, but I'm
> > > > > not sure that _SLICE is self-describing given that we can operate either
> > > > > per-frame or per-slice, and _SLICE sort of implies the latter. Also, VP8 uses
> > > > > _FRAME to clearly indicate that it operates per-frame.
> > > > 
> > > > Well, VP8 doesn't support slices at all.
> > > > 
> > > > > In addition, the _SLICE suffix is used by MPEG-2 in the stable API. Since we
> > > > 
> > > > Regarding MPEG-2: while it has a concept of slices, it is my understanding
> > > > that you never process slices separately, but only full pictures. I may be
> > > > wrong here.
> > > 
> > > I don't think that is the case since ffmpeg clearly implements decoding on a
> > > per-slice basis (mpeg_decode_slice).
> > > 
> > > Information is also passed on a per-slice basis to VAAPI 
> > > (vaapi_mpeg2_decode_slice) with a distinct data buffer and slice parameter
> > > buffer for each slice. Among other things, it contains the vertical and
> > > horizontal positions for the slice, which we can set in the hardware.
> > > 
> > > > > certainly want MPEG-2 to allow per-slice and per-frame decoding as well as
> > > > > H.264 and that the _SLICE format is specified to be the broken "concatenated
> > > > > slices" that cedrus expects, we probably want to use another suffix. This way,
> > > > > we could deprecated MPEG2_SLICE and introduce a new format for MPEG-2 that would
> > > > > have consistent naming with the other mpeg formats.
> > > > 
> > > > I actually think that H264_SLICE is a decent name.
> > > > 
> > > > I'm less sure about MPEG2_SLICE since I am not sure if it means the same as
> > > > a H264 slice.
> > > 
> > > The main problem I see is that we have already specified MPEG2_SLICE in a way
> > > that is incompatible with the future improvments we want to bring to the API:
> > > " The output buffer must contain the appropriate number of macroblocks to
> > > decode a full corresponding frame to the matching capture buffer."
> > > 
> > > So I only see two possibilities: either we decide to change the specification
> > > of the pixel format and we can keep using the _SLICE suffix, either we need to
> > > introduce a new pixel format with another suffix, which should also be reflected
> > > on other MPEG formats for consistency. Then we can deprecate MPEG2_SLICE and
> > > have drivers stop using it.
> > > 
> > > What do you think?
> > 
> > I'd change the specification of the pixel format. So MPEG2_SLICE now supports
> > multiple slices if the hardware supports it as well.
> > 
> > We would need an MPEG2_DECODING_MODE control as well, that currently would
> > read FRAME based only.
> > 
> 
> That's exactly what I was about to suggest.

Sounds perfect then!

I have started looking at the start-code situation to see if it shares
similarities with H.264, but did not go far enough to reach any conclusion
on that aspect.

Cheers,

Paul

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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Re: [PATCH v7 04/11] media: uapi: h264: Add the concept of start code

[Nicolas Dufresne]

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Le vendredi 16 août 2019 à 13:01 -0300, Ezequiel Garcia a écrit :
> Stateless decoders have different expectations about the
> start code that is prepended on H264 slices. Add a
> menu control to express the supported start code types
> (including no start code).
> 
> Drivers are allowed to support only one start code type,
> but they can support both too.
> 
> Note that this is independent of the H264 decoding mode,
> which specifies the granularity of the decoding operations.
> Either in frame-based or slice-based mode, this new control
> will allow to define the start code expected on H264 slices.
> 
> Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
> Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
> ---
> Changes in v7:
> * None.
> Changes in v6:
> * Rename to START_CODE and enum values
>   as suggested by Hand and Paul.
> Changes in v5:
> * Improve specification as suggested by Hans.
> Changes in v4:
> * New patch.
> ---
>  .../media/uapi/v4l/ext-ctrls-codec.rst        | 33 +++++++++++++++++++
>  .../media/uapi/v4l/pixfmt-compressed.rst      |  5 +--
>  drivers/media/v4l2-core/v4l2-ctrls.c          |  9 +++++
>  include/media/h264-ctrls.h                    |  6 ++++
>  4 files changed, 51 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> index 7e7447d9998c..3703c705286f 100644
> --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> @@ -2076,6 +2076,39 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
>          The OUTPUT buffer must contain all slices needed to decode the
>          frame. The OUTPUT buffer must also contain both fields.
>  
> +``V4L2_CID_MPEG_VIDEO_H264_START_CODE (enum)``

I believe we need to revisit the naming here. In most documents I've
read, start code refers to a header that allow parsing a bit stream
from a random location. In H264, this is used as synonyme of ANNEX B
NAL Headers. In this context, the obvious future value to this enum is
AVCc headers, which is not a start code.

I would suggest to revisite and rename to:

  V4L2_CID_MPEG_VIDEO_H264_NAL_HDR_TYPE


> +    Specifies the H264 slice start code expected for each slice.
> +    This control is used as a modifier for V4L2_PIX_FMT_H264_SLICE
> +    pixel format. Applications that support V4L2_PIX_FMT_H264_SLICE
> +    are required to set this control in order to specify the start code
> +    that is expected for the buffer.
> +    Drivers may expose a single or multiple start codes, depending
> +    on what they can support.
> +
> +    .. note::
> +
> +       This menu control is not yet part of the public kernel API and
> +       it is expected to change.
> +
> +.. c:type:: v4l2_mpeg_video_h264_start_code
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> +    :header-rows:  0
> +    :stub-columns: 0
> +    :widths:       1 1 2
> +
> +    * - ``V4L2_MPEG_VIDEO_H264_START_CODE_NONE``
> +      - 0
> +      - Selecting this value specifies that H264 slices are passed
> +        to the driver without any start code.
> +    * - ``V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B``
> +      - 1
> +      - Selecting this value specifies that H264 slices are expected
> +        to be prefixed by Annex B start codes. According to :ref:`h264`
> +        valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001.
> +
>  .. _v4l2-mpeg-mpeg2:
>  
>  ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)``
> diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> index d666eb51741a..493b6020107d 100644
> --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
> @@ -60,8 +60,9 @@ Compressed Formats
>  	extracted from the H264 bitstream.  This format is adapted for
>  	stateless video decoders that implement an H264 pipeline
>  	(using the :ref:`mem2mem` and :ref:`media-request-api`).
> -	This pixelformat has a modifier that must be set at least once
> -	through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE`` control.
> +	This pixelformat has two modifiers that must be set at least once
> +	through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE``
> +        and ``V4L2_CID_MPEG_VIDEO_H264_START_CODE`` controls.
>  	In addition, metadata associated with the frame to decode are
>  	required to be passed through the ``V4L2_CID_MPEG_VIDEO_H264_SPS``,
>  	``V4L2_CID_MPEG_VIDEO_H264_PPS``,
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index 2c67f9fc4d5b..1d8f38824631 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -407,6 +407,11 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
>  		"Frame-Based",
>  		NULL,
>  	};
> +	static const char * const h264_start_code[] = {
> +		"No Start Code",
> +		"Annex B Start Code",
> +		NULL,
> +	};
>  	static const char * const mpeg_mpeg2_level[] = {
>  		"Low",
>  		"Main",
> @@ -640,6 +645,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
>  		return h264_fmo_map_type;
>  	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:
>  		return h264_decode_mode;
> +	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:
> +		return h264_start_code;
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
>  		return mpeg_mpeg2_level;
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
> @@ -860,6 +867,7 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS:		return "H264 Slice Parameters";
>  	case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS:		return "H264 Decode Parameters";
>  	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:		return "H264 Decode Mode";
> +	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:		return "H264 Start Code";
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:			return "MPEG2 Level";
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:			return "MPEG2 Profile";
>  	case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP:		return "MPEG4 I-Frame QP Value";
> @@ -1229,6 +1237,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  	case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
>  	case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
>  	case V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE:
> +	case V4L2_CID_MPEG_VIDEO_H264_START_CODE:
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL:
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_PROFILE:
>  	case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
> diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
> index 928c48c57282..ba2876a64cf6 100644
> --- a/include/media/h264-ctrls.h
> +++ b/include/media/h264-ctrls.h
> @@ -27,6 +27,7 @@
>  #define V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS	(V4L2_CID_MPEG_BASE+1003)
>  #define V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS	(V4L2_CID_MPEG_BASE+1004)
>  #define V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE	(V4L2_CID_MPEG_BASE+1005)
> +#define V4L2_CID_MPEG_VIDEO_H264_START_CODE	(V4L2_CID_MPEG_BASE+1006)
>  
>  /* enum v4l2_ctrl_type type values */
>  #define V4L2_CTRL_TYPE_H264_SPS			0x0110
> @@ -40,6 +41,11 @@ enum v4l2_mpeg_video_h264_decode_mode {
>  	V4L2_MPEG_VIDEO_H264_DECODE_MODE_FRAME_BASED,
>  };
>  
> +enum v4l2_mpeg_video_h264_start_code {
> +	V4L2_MPEG_VIDEO_H264_START_CODE_NONE,
> +	V4L2_MPEG_VIDEO_H264_START_CODE_ANNEX_B,
> +};
> +
>  #define V4L2_H264_SPS_CONSTRAINT_SET0_FLAG			0x01
>  #define V4L2_H264_SPS_CONSTRAINT_SET1_FLAG			0x02
>  #define V4L2_H264_SPS_CONSTRAINT_SET2_FLAG			0x04

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