linux-kernel - [PATCH v6 06/10] media: hantro/cedrus: Remove unneeded slice size and slice offset

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Date:   Mon, 26 Apr 2021 00:35:18 -0300
From:   Ezequiel Garcia <ezequiel@...labora.com>
To:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     kernel@...labora.com, Jonas Karlman <jonas@...boo.se>,
        Hans Verkuil <hverkuil@...all.nl>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Maxime Ripard <mripard@...nel.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Daniel Almeida <daniel.almeida@...labora.com>,
        Ezequiel Garcia <ezequiel@...labora.com>
Subject: [PATCH v6 06/10] media: hantro/cedrus: Remove unneeded slice size and slice offset

The MPEG2_SLICE_PARAMS control is designed to refer to a
single slice. However, the Hantro and Cedrus drivers operate
in per-frame mode, and so does the current Ffmpeg and GStreamer
implementations that are tested with these two drivers.

In other words, the drivers are expecting all the slices in a picture
(with either frame or field structure) to be contained in
the OUTPUT buffer, which means the slice size and offset shouldn't be used.

Signed-off-by: Ezequiel Garcia <ezequiel@...labora.com>
---
 drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c     | 4 ++--
 drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c | 4 ++--
 drivers/staging/media/sunxi/cedrus/cedrus_mpeg2.c      | 7 +++----
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c b/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
index d35071e88116..c4040fba7c80 100644
--- a/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
+++ b/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
@@ -203,7 +203,7 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
 	      G1_REG_TOPFIELDFIRST_E(pic->flags & V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST);
 	vdpu_write_relaxed(vpu, reg, G1_SWREG(4));
 
-	reg = G1_REG_STRM_START_BIT(slice_params->data_bit_offset) |
+	reg = G1_REG_STRM_START_BIT(0) |
 	      G1_REG_QSCALE_TYPE(pic->flags & V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE) |
 	      G1_REG_CON_MV_E(pic->flags & V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV) |
 	      G1_REG_INTRA_DC_PREC(pic->intra_dc_precision) |
@@ -212,7 +212,7 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
 	vdpu_write_relaxed(vpu, reg, G1_SWREG(5));
 
 	reg = G1_REG_INIT_QP(1) |
-	      G1_REG_STREAM_LEN(slice_params->bit_size >> 3);
+	      G1_REG_STREAM_LEN(vb2_get_plane_payload(&src_buf->vb2_buf, 0));
 	vdpu_write_relaxed(vpu, reg, G1_SWREG(6));
 
 	reg = G1_REG_ALT_SCAN_FLAG_E(pic->flags & V4L2_MPEG2_PIC_FLAG_ALT_SCAN) |
diff --git a/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c b/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
index 18bd14704ebf..314269811244 100644
--- a/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
+++ b/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
@@ -177,7 +177,7 @@ void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx)
 	vdpu_write_relaxed(vpu, reg, VDPU_SWREG(50));
 
 	reg = VDPU_REG_INIT_QP(1) |
-	      VDPU_REG_STREAM_LEN(slice_params->bit_size >> 3);
+	      VDPU_REG_STREAM_LEN(vb2_get_plane_payload(&src_buf->vb2_buf, 0));
 	vdpu_write_relaxed(vpu, reg, VDPU_SWREG(51));
 
 	reg = VDPU_REG_APF_THRESHOLD(8) |
@@ -220,7 +220,7 @@ void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx)
 	      VDPU_REG_TOPFIELDFIRST_E(pic->flags & V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST);
 	vdpu_write_relaxed(vpu, reg, VDPU_SWREG(120));
 
-	reg = VDPU_REG_STRM_START_BIT(slice_params->data_bit_offset) |
+	reg = VDPU_REG_STRM_START_BIT(0) |
 	      VDPU_REG_QSCALE_TYPE(pic->flags & V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE) |
 	      VDPU_REG_CON_MV_E(pic->flags & V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV) |
 	      VDPU_REG_INTRA_DC_PREC(pic->intra_dc_precision) |
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_mpeg2.c b/drivers/staging/media/sunxi/cedrus/cedrus_mpeg2.c
index 16e99792cf42..fd71cb175318 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_mpeg2.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_mpeg2.c
@@ -152,10 +152,9 @@ static void cedrus_mpeg2_setup(struct cedrus_ctx *ctx, struct cedrus_run *run)
 
 	/* Source offset and length in bits. */
 
-	cedrus_write(dev, VE_DEC_MPEG_VLD_OFFSET,
-		     slice_params->data_bit_offset);
+	cedrus_write(dev, VE_DEC_MPEG_VLD_OFFSET, 0);
 
-	reg = slice_params->bit_size - slice_params->data_bit_offset;
+	reg = vb2_get_plane_payload(&run->src->vb2_buf, 0) * 8;
 	cedrus_write(dev, VE_DEC_MPEG_VLD_LEN, reg);
 
 	/* Source beginning and end addresses. */
@@ -169,7 +168,7 @@ static void cedrus_mpeg2_setup(struct cedrus_ctx *ctx, struct cedrus_run *run)
 
 	cedrus_write(dev, VE_DEC_MPEG_VLD_ADDR, reg);
 
-	reg = src_buf_addr + DIV_ROUND_UP(slice_params->bit_size, 8);
+	reg = src_buf_addr + vb2_get_plane_payload(&run->src->vb2_buf, 0);
 	cedrus_write(dev, VE_DEC_MPEG_VLD_END_ADDR, reg);
 
 	/* Macroblock address: start at the beginning. */
-- 
2.30.0