linux-kernel - [RFC v2 6/8] media: uapi: Remove bit_size field from v4l2_ctrl_hevc_slice

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Message-Id: <20220215110103.241297-7-benjamin.gaignard@collabora.com>
Date:   Tue, 15 Feb 2022 12:01:01 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     mchehab@...nel.org, ezequiel@...guardiasur.com.ar,
        p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
        mripard@...nel.org, paul.kocialkowski@...tlin.com, wens@...e.org,
        jernej.skrabec@...il.com, hverkuil-cisco@...all.nl,
        jonas@...boo.se, nicolas@...fresne.ca
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        kernel@...labora.com, knaerzche@...il.com, jc@...esim.co.uk,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: [RFC v2 6/8] media: uapi: Remove bit_size field from v4l2_ctrl_hevc_slice_params

The bit size of the slice could be deduced from the buffer payload
so remove bit_size field to avoid duplicated the information.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
---
 .../userspace-api/media/v4l/ext-ctrls-codec.rst       |  3 ---
 drivers/staging/media/sunxi/cedrus/cedrus_h265.c      | 11 ++++-------
 include/uapi/linux/v4l2-controls.h                    |  3 +--
 3 files changed, 5 insertions(+), 12 deletions(-)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 3296ac3b9fca..c3ae97657fa7 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -2965,9 +2965,6 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
     :stub-columns: 0
     :widths:       1 1 2
 
-    * - __u32
-      - ``bit_size``
-      - Size (in bits) of the current slice data.
     * - __u32
       - ``data_bit_offset``
       - Offset (in bits) to the video data in the current slice data.
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
index 8ab2d9c6f048..db8c7475eeb8 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
@@ -312,8 +312,8 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
 	const struct v4l2_hevc_pred_weight_table *pred_weight_table;
 	unsigned int width_in_ctb_luma, ctb_size_luma;
 	unsigned int log2_max_luma_coding_block_size;
+	size_t slice_bytes;
 	dma_addr_t src_buf_addr;
-	dma_addr_t src_buf_end_addr;
 	u32 chroma_log2_weight_denom;
 	u32 output_pic_list_index;
 	u32 pic_order_cnt[2];
@@ -370,8 +370,8 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
 
 	cedrus_write(dev, VE_DEC_H265_BITS_OFFSET, 0);
 
-	reg = slice_params->bit_size;
-	cedrus_write(dev, VE_DEC_H265_BITS_LEN, reg);
+	slice_bytes = vb2_get_plane_payload(&run->src->vb2_buf, 0);
+	cedrus_write(dev, VE_DEC_H265_BITS_LEN, slice_bytes);
 
 	/* Source beginning and end addresses. */
 
@@ -384,10 +384,7 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
 
 	cedrus_write(dev, VE_DEC_H265_BITS_ADDR, reg);
 
-	src_buf_end_addr = src_buf_addr +
-			   DIV_ROUND_UP(slice_params->bit_size, 8);
-
-	reg = VE_DEC_H265_BITS_END_ADDR_BASE(src_buf_end_addr);
+	reg = VE_DEC_H265_BITS_END_ADDR_BASE(src_buf_addr + slice_bytes);
 	cedrus_write(dev, VE_DEC_H265_BITS_END_ADDR, reg);
 
 	/* Coding tree block address */
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index b1a3dc05f02f..27f5d272dc43 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -2457,7 +2457,6 @@ struct v4l2_hevc_pred_weight_table {
 #define V4L2_HEVC_SLICE_PARAMS_FLAG_DEPENDENT_SLICE_SEGMENT	(1ULL << 9)
 
 struct v4l2_ctrl_hevc_slice_params {
-	__u32	bit_size;
 	__u32	data_bit_offset;
 
 	/* ISO/IEC 23008-2, ITU-T Rec. H.265: NAL unit header */
@@ -2484,7 +2483,7 @@ struct v4l2_ctrl_hevc_slice_params {
 	/* ISO/IEC 23008-2, ITU-T Rec. H.265: Picture timing SEI message */
 	__u8	pic_struct;
 
-	__u8	reserved;
+	__u8	reserved[5];
 
 	/* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
 	__u32	slice_segment_addr;
-- 
2.32.0