media: hantro: Hook up RK3399 JPEG encoder output

The JPEG encoder found in the Hantro H1 encoder block only produces a
raw entropy-encoded scan. The driver is responsible for building a JPEG
compliant bitstream and placing the entropy-encoded scan in it. Right
now the driver uses a bounce buffer for the hardware to output the raw
scan to.

In commit e765dba11e ("hantro: Move hantro_enc_buf_finish to JPEG
codec_ops.done"), the code that copies the raw scan from the bounce
buffer to the capture buffer was moved, but was only hooked up for the
Hantro H1 (then RK3288) variant. The RK3399 variant was broken,
producing a JPEG bitstream without the scan, and the capture buffer's
.bytesused field unset.

Fix this by duplicating the code that is executed when the JPEG encoder
finishes encoding a frame. As the encoded length is read back from
hardware, and the variants having different register layouts, the
code is duplicated rather than shared.

Fixes: e765dba11e ("hantro: Move hantro_enc_buf_finish to JPEG codec_ops.done")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Tested-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/hantro/hantro_h1_jpeg_enc.c

@@ -139,7 +139,7 @@ int hantro_h1_jpeg_enc_run(struct hantro_ctx *ctx)
 	return 0;
 }
 
-void hantro_jpeg_enc_done(struct hantro_ctx *ctx)
+void hantro_h1_jpeg_enc_done(struct hantro_ctx *ctx)
 {
 	struct hantro_dev *vpu = ctx->dev;
 	u32 bytesused = vepu_read(vpu, H1_REG_STR_BUF_LIMIT) / 8;

drivers/staging/media/hantro/hantro_hw.h

@@ -328,7 +328,8 @@ int hantro_h1_jpeg_enc_run(struct hantro_ctx *ctx);
 int rockchip_vpu2_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);
-void hantro_jpeg_enc_done(struct hantro_ctx *ctx);
+void hantro_h1_jpeg_enc_done(struct hantro_ctx *ctx);
+void rockchip_vpu2_jpeg_enc_done(struct hantro_ctx *ctx);
 
 dma_addr_t hantro_h264_get_ref_buf(struct hantro_ctx *ctx,
 				   unsigned int dpb_idx);

drivers/staging/media/hantro/rockchip_vpu2_hw_jpeg_enc.c

@@ -170,3 +170,20 @@ int rockchip_vpu2_jpeg_enc_run(struct hantro_ctx *ctx)
 
 	return 0;
 }
+
+void rockchip_vpu2_jpeg_enc_done(struct hantro_ctx *ctx)
+{
+	struct hantro_dev *vpu = ctx->dev;
+	u32 bytesused = vepu_read(vpu, VEPU_REG_STR_BUF_LIMIT) / 8;
+	struct vb2_v4l2_buffer *dst_buf = hantro_get_dst_buf(ctx);
+
+	/*
+	 * TODO: Rework the JPEG encoder to eliminate the need
+	 * for a bounce buffer.
+	 */
+	memcpy(vb2_plane_vaddr(&dst_buf->vb2_buf, 0) +
+	       ctx->vpu_dst_fmt->header_size,
+	       ctx->jpeg_enc.bounce_buffer.cpu, bytesused);
+	vb2_set_plane_payload(&dst_buf->vb2_buf, 0,
+			      ctx->vpu_dst_fmt->header_size + bytesused);
+}

drivers/staging/media/hantro/rockchip_vpu_hw.c

@@ -344,7 +344,7 @@ static const struct hantro_codec_ops rk3066_vpu_codec_ops[] = {
 		.run = hantro_h1_jpeg_enc_run,
 		.reset = rockchip_vpu1_enc_reset,
 		.init = hantro_jpeg_enc_init,
-		.done = hantro_jpeg_enc_done,
+		.done = hantro_h1_jpeg_enc_done,
 		.exit = hantro_jpeg_enc_exit,
 	},
 	[HANTRO_MODE_H264_DEC] = {
@@ -372,7 +372,7 @@ static const struct hantro_codec_ops rk3288_vpu_codec_ops[] = {
 		.run = hantro_h1_jpeg_enc_run,
 		.reset = rockchip_vpu1_enc_reset,
 		.init = hantro_jpeg_enc_init,
-		.done = hantro_jpeg_enc_done,
+		.done = hantro_h1_jpeg_enc_done,
 		.exit = hantro_jpeg_enc_exit,
 	},
 	[HANTRO_MODE_H264_DEC] = {
@@ -400,6 +400,7 @@ static const struct hantro_codec_ops rk3399_vpu_codec_ops[] = {
 		.run = rockchip_vpu2_jpeg_enc_run,
 		.reset = rockchip_vpu2_enc_reset,
 		.init = hantro_jpeg_enc_init,
+		.done = rockchip_vpu2_jpeg_enc_done,
 		.exit = hantro_jpeg_enc_exit,
 	},
 	[HANTRO_MODE_H264_DEC] = {