media: verisilicon: Add AV1 entropy helpers

AV1 hardware decoder needs entropy parameters to decode frames.
They are computed from various arrays defined in AV1 section
"9.4. Default CDF tables".

Add helpers functions to init, store and get these parameters.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Author: Benjamin Gaignard

drivers/media/platform/verisilicon/Makefile

@@ -18,6 +18,7 @@ hantro-vpu-y += \
 		rockchip_vpu2_hw_h264_dec.o \
 		rockchip_vpu2_hw_mpeg2_dec.o \
 		rockchip_vpu2_hw_vp8_dec.o \
+		rockchip_av1_entropymode.o \
 		hantro_jpeg.o \
 		hantro_h264.o \
 		hantro_hevc.o \

drivers/media/platform/verisilicon/hantro.h

@@ -240,6 +240,7 @@ struct hantro_dev {
  * @vp8_dec:		VP8-decoding context.
  * @hevc_dec:		HEVC-decoding context.
  * @vp9_dec:		VP9-decoding context.
+ * @av1_dec:		AV1-decoding context.
  */
 struct hantro_ctx {
 	struct hantro_dev *dev;
@@ -268,6 +269,7 @@ struct hantro_ctx {
 		struct hantro_vp8_dec_hw_ctx vp8_dec;
 		struct hantro_hevc_dec_hw_ctx hevc_dec;
 		struct hantro_vp9_dec_hw_ctx vp9_dec;
+		struct hantro_av1_dec_hw_ctx av1_dec;
 	};
 };
 

drivers/media/platform/verisilicon/hantro_hw.h

@@ -15,6 +15,8 @@
 #include <media/v4l2-vp9.h>
 #include <media/videobuf2-core.h>
 
+#include "rockchip_av1_entropymode.h"
+
 #define DEC_8190_ALIGN_MASK	0x07U
 
 #define MB_DIM			16
@@ -247,6 +249,24 @@ struct hantro_vp9_dec_hw_ctx {
 	s16 feature_data[8][4];
 };
 
+/**
+ * hantro_av1_dec_hw_ctx
+ * @cdfs:		current probabilities structure
+ * @cdfs_ndvc:		current mv probabilities structure
+ * @default_cdfs:	default probabilities structure
+ * @default_cdfs_ndvc:	default mv probabilties structure
+ * @cdfs_last:		stored probabilities structures
+ * @cdfs_last_ndvc:	stored mv probabilities structures
+ */
+struct hantro_av1_dec_hw_ctx {
+	struct av1cdfs *cdfs;
+	struct mvcdfs  *cdfs_ndvc;
+	struct av1cdfs default_cdfs;
+	struct mvcdfs  default_cdfs_ndvc;
+	struct av1cdfs cdfs_last[NUM_REF_FRAMES];
+	struct mvcdfs  cdfs_last_ndvc[NUM_REF_FRAMES];
+};
+
 /**
  * struct hantro_postproc_ctx
  *