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Subject[PATCH] media: rkvdec: Fix H264 scaling list order
Date
The Rockchip Video Decoder driver is expecting that the values in a
scaling list are in zig-zag order and applies the inverse scanning process
to get the values in matrix order.

Commit 0b0393d59eb4 ("media: uapi: h264: clarify expected
scaling_list_4x4/8x8 order") clarified that the values in the scaling list
should already be in matrix order.

Fix this by removing the reordering and change to use two memcpy.

Fixes: cd33c830448b ("media: rkvdec: Add the rkvdec driver")
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
drivers/staging/media/rkvdec/rkvdec-h264.c | 70 +++++++---------------
1 file changed, 22 insertions(+), 48 deletions(-)

diff --git a/drivers/staging/media/rkvdec/rkvdec-h264.c b/drivers/staging/media/rkvdec/rkvdec-h264.c
index cd4980d06be7..2719f0c66a4a 100644
--- a/drivers/staging/media/rkvdec/rkvdec-h264.c
+++ b/drivers/staging/media/rkvdec/rkvdec-h264.c
@@ -18,11 +18,16 @@
/* Size with u32 units. */
#define RKV_CABAC_INIT_BUFFER_SIZE (3680 + 128)
#define RKV_RPS_SIZE ((128 + 128) / 4)
-#define RKV_SCALING_LIST_SIZE (6 * 16 + 6 * 64 + 128)
#define RKV_ERROR_INFO_SIZE (256 * 144 * 4)

#define RKVDEC_NUM_REFLIST 3

+struct rkvdec_scaling_matrix {
+ u8 scaling_list_4x4[6][16];
+ u8 scaling_list_8x8[6][64];
+ u8 padding[128];
+};
+
struct rkvdec_sps_pps_packet {
u32 info[8];
};
@@ -86,7 +91,7 @@ struct rkvdec_ps_field {
/* Data structure describing auxiliary buffer format. */
struct rkvdec_h264_priv_tbl {
s8 cabac_table[4][464][2];
- u8 scaling_list[RKV_SCALING_LIST_SIZE];
+ struct rkvdec_scaling_matrix scaling_list;
u32 rps[RKV_RPS_SIZE];
struct rkvdec_sps_pps_packet param_set[256];
u8 err_info[RKV_ERROR_INFO_SIZE];
@@ -785,56 +790,25 @@ static void assemble_hw_rps(struct rkvdec_ctx *ctx,
}
}

-/*
- * NOTE: The values in a scaling list are in zig-zag order, apply inverse
- * scanning process to get the values in matrix order.
- */
-static const u32 zig_zag_4x4[16] = {
- 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15
-};
-
-static const u32 zig_zag_8x8[64] = {
- 0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5,
- 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28,
- 35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51,
- 58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63
-};
-
-static void reorder_scaling_list(struct rkvdec_ctx *ctx,
- struct rkvdec_h264_run *run)
+static void assemble_hw_scaling_list(struct rkvdec_ctx *ctx,
+ struct rkvdec_h264_run *run)
{
const struct v4l2_ctrl_h264_scaling_matrix *scaling = run->scaling_matrix;
- 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 rkvdec_h264_ctx *h264_ctx = ctx->priv;
struct rkvdec_h264_priv_tbl *tbl = h264_ctx->priv_tbl.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;
- }
+ BUILD_BUG_ON(sizeof(tbl->scaling_list.scaling_list_4x4) !=
+ sizeof(scaling->scaling_list_4x4));
+ BUILD_BUG_ON(sizeof(tbl->scaling_list.scaling_list_8x8) !=
+ sizeof(scaling->scaling_list_8x8));
+
+ memcpy(tbl->scaling_list.scaling_list_4x4,
+ scaling->scaling_list_4x4,
+ sizeof(scaling->scaling_list_4x4));
+
+ memcpy(tbl->scaling_list.scaling_list_8x8,
+ scaling->scaling_list_8x8,
+ sizeof(scaling->scaling_list_8x8));
}

/*
@@ -1126,7 +1100,7 @@ static int rkvdec_h264_run(struct rkvdec_ctx *ctx)
v4l2_h264_build_b_ref_lists(&reflist_builder, h264_ctx->reflists.b0,
h264_ctx->reflists.b1);

- reorder_scaling_list(ctx, &run);
+ assemble_hw_scaling_list(ctx, &run);
assemble_hw_pps(ctx, &run);
assemble_hw_rps(ctx, &run);
config_registers(ctx, &run);
--
2.17.1
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