media: hantro: move postproc enablement for old cores

Older G2 cores, like that in Allwinner H6, seem to have issue with
latching postproc register values if this is first thing done in job.
Moving that to the end solves the issue.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Author: jernejsk

drivers/staging/media/hantro/hantro.h

@@ -75,6 +75,7 @@ struct hantro_irq {
  * @num_regs:			number of register range names in the array
  * @double_buffer:		core needs double buffering
  * @legacy_regs:		core uses legacy register set
+ * @late_postproc:		postproc must be set up at the end of the job
  */
 struct hantro_variant {
 	unsigned int enc_offset;
@@ -98,6 +99,7 @@ struct hantro_variant {
 	int num_regs;
 	unsigned int double_buffer : 1;
 	unsigned int legacy_regs : 1;
+	unsigned int late_postproc : 1;
 };
 
 /**

drivers/staging/media/hantro/hantro_drv.c

@@ -130,7 +130,7 @@ void hantro_start_prepare_run(struct hantro_ctx *ctx)
 	v4l2_ctrl_request_setup(src_buf->vb2_buf.req_obj.req,
 				&ctx->ctrl_handler);
 
-	if (!ctx->is_encoder) {
+	if (!ctx->is_encoder && !ctx->dev->variant->late_postproc) {
 		if (hantro_needs_postproc(ctx, ctx->vpu_dst_fmt))
 			hantro_postproc_enable(ctx);
 		else
@@ -142,6 +142,13 @@ void hantro_end_prepare_run(struct hantro_ctx *ctx)
 {
 	struct vb2_v4l2_buffer *src_buf;
 
+	if (!ctx->is_encoder && ctx->dev->variant->late_postproc) {
+		if (hantro_needs_postproc(ctx, ctx->vpu_dst_fmt))
+			hantro_postproc_enable(ctx);
+		else
+			hantro_postproc_disable(ctx);
+	}
+
 	src_buf = hantro_get_src_buf(ctx);
 	v4l2_ctrl_request_complete(src_buf->vb2_buf.req_obj.req,
 				   &ctx->ctrl_handler);