linux-kernel - [PATCH v2 07/12] staging: media: rkvdec: Add a routine to fetch SPS attributes as a callback

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Message-Id: <20230101-patch-series-v2-6-2-rc1-v2-7-fa1897efac14@collabora.com>
Date:   Thu, 12 Jan 2023 13:56:22 +0100
From:   Sebastian Fricke <sebastian.fricke@...labora.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
        Jonas Karlman <jonas@...boo.se>,
        Alex Bee <knaerzche@...il.com>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Collabora Kernel-domain <kernel@...labora.com>,
        Robert Beckett <bob.beckett@...labora.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Andrzej Pietrasiewicz <andrzej.p@...labora.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Sebastian Fricke <sebastian.fricke@...labora.com>
Subject: [PATCH v2 07/12] staging: media: rkvdec: Add a routine to fetch SPS
 attributes as a callback

Add a callback for each codec variant, that fetches basic information
like resolution, bit-depth and sub-sampling from a SPS structure. This
data is used to verify whether a new SPS structure is valid.

Signed-off-by: Sebastian Fricke <sebastian.fricke@...labora.com>
---
 drivers/staging/media/rkvdec/rkvdec.c | 10 ++++++++++
 drivers/staging/media/rkvdec/rkvdec.h | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
index a46f918926a2..e8c750a7343a 100644
--- a/drivers/staging/media/rkvdec/rkvdec.c
+++ b/drivers/staging/media/rkvdec/rkvdec.c
@@ -52,6 +52,16 @@ static int rkvdec_get_valid_fmt(struct rkvdec_ctx *ctx)
 	return ctx->coded_fmt_desc->decoded_fmts[0];
 }
 
+static int rkvdec_get_sps_attributes(struct rkvdec_ctx *ctx, void *sps,
+				     struct sps_attributes *attributes)
+{
+	const struct rkvdec_coded_fmt_desc *coded_desc = ctx->coded_fmt_desc;
+
+	if (coded_desc->ops->get_sps_attributes)
+		return coded_desc->ops->get_sps_attributes(ctx, sps, attributes);
+	return 0;
+}
+
 static int rkvdec_try_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct rkvdec_ctx *ctx = container_of(ctrl->handler, struct rkvdec_ctx, ctrl_hdl);
diff --git a/drivers/staging/media/rkvdec/rkvdec.h b/drivers/staging/media/rkvdec/rkvdec.h
index e353a4403e5b..7b6702c360fd 100644
--- a/drivers/staging/media/rkvdec/rkvdec.h
+++ b/drivers/staging/media/rkvdec/rkvdec.h
@@ -63,10 +63,20 @@ vb2_to_rkvdec_decoded_buf(struct vb2_buffer *buf)
 			    base.vb.vb2_buf);
 }
 
+struct sps_attributes {
+	unsigned int width;
+	unsigned int height;
+	unsigned int luma_bitdepth;
+	unsigned int chroma_bitdepth;
+	unsigned int subsampling;
+};
+
 struct rkvdec_coded_fmt_ops {
 	int (*adjust_fmt)(struct rkvdec_ctx *ctx,
 			  struct v4l2_format *f);
 	u32 (*valid_fmt)(struct rkvdec_ctx *ctx);
+	int (*get_sps_attributes)(struct rkvdec_ctx *ctx, void *sps,
+				  struct sps_attributes *attributes);
 	int (*start)(struct rkvdec_ctx *ctx);
 	void (*stop)(struct rkvdec_ctx *ctx);
 	int (*run)(struct rkvdec_ctx *ctx);

-- 
2.25.1