media: hantro: Prevent encoders from using post-processing

The post-processing feature is meant to be used by decoding
only. Prevent encoding jobs from enabling it.

Fixes: 8c2d66b0 ("media: hantro: Support color conversion via post-processing")
Signed-off-by: Ezequiel Garcia <ezequiel@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.h

@@ -423,7 +423,7 @@ hantro_get_dst_buf(struct hantro_ctx *ctx)
 static inline bool
 hantro_needs_postproc(struct hantro_ctx *ctx, const struct hantro_fmt *fmt)
 {
-	return fmt->fourcc != V4L2_PIX_FMT_NV12;
+	return !hantro_is_encoder_ctx(ctx) && fmt->fourcc != V4L2_PIX_FMT_NV12;
 }
 
 static inline dma_addr_t