media: hantro: Cleanup format negotiation helpers

Format negotiation helpers, hantro_find_format()
and hantro_get_default_fmt() can be simplified,
making the code a little bit clearer.

More importantly, this change is preparation work
for the post-processor usage.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Boris Brezillon <boris.brezillon@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_v4l2.c

@@ -47,23 +47,26 @@ hantro_get_formats(const struct hantro_ctx *ctx, unsigned int *num_fmts)
 }
 
 static const struct hantro_fmt *
-hantro_find_format(const struct hantro_fmt *formats, unsigned int num_fmts,
-		   u32 fourcc)
+hantro_find_format(const struct hantro_ctx *ctx, u32 fourcc)
 {
-	unsigned int i;
+	const struct hantro_fmt *formats;
+	unsigned int i, num_fmts;
 
+	formats = hantro_get_formats(ctx, &num_fmts);
 	for (i = 0; i < num_fmts; i++)
 		if (formats[i].fourcc == fourcc)
 			return &formats[i];
+
 	return NULL;
 }
 
 static const struct hantro_fmt *
-hantro_get_default_fmt(const struct hantro_fmt *formats, unsigned int num_fmts,
-		       bool bitstream)
+hantro_get_default_fmt(const struct hantro_ctx *ctx, bool bitstream)
 {
-	unsigned int i;
+	const struct hantro_fmt *formats;
+	unsigned int i, num_fmts;
 
+	formats = hantro_get_formats(ctx, &num_fmts);
 	for (i = 0; i < num_fmts; i++) {
 		if (bitstream == (formats[i].codec_mode !=
 				  HANTRO_MODE_NONE))
@@ -89,8 +92,7 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
 				  struct v4l2_frmsizeenum *fsize)
 {
 	struct hantro_ctx *ctx = fh_to_ctx(priv);
-	const struct hantro_fmt *formats, *fmt;
-	unsigned int num_fmts;
+	const struct hantro_fmt *fmt;
 
 	if (fsize->index != 0) {
 		vpu_debug(0, "invalid frame size index (expected 0, got %d)\n",
@@ -98,8 +100,7 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
 		return -EINVAL;
 	}
 
-	formats = hantro_get_formats(ctx, &num_fmts);
-	fmt = hantro_find_format(formats, num_fmts, fsize->pixel_format);
+	fmt = hantro_find_format(ctx, fsize->pixel_format);
 	if (!fmt) {
 		vpu_debug(0, "unsupported bitstream format (%08x)\n",
 			  fsize->pixel_format);
@@ -196,8 +197,7 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f,
 {
 	struct hantro_ctx *ctx = fh_to_ctx(priv);
 	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
-	const struct hantro_fmt *formats, *fmt, *vpu_fmt;
-	unsigned int num_fmts;
+	const struct hantro_fmt *fmt, *vpu_fmt;
 	bool coded;
 
 	coded = capture == hantro_is_encoder_ctx(ctx);
@@ -208,10 +208,9 @@ static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f,
 		  (pix_mp->pixelformat >> 16) & 0x7f,
 		  (pix_mp->pixelformat >> 24) & 0x7f);
 
-	formats = hantro_get_formats(ctx, &num_fmts);
-	fmt = hantro_find_format(formats, num_fmts, pix_mp->pixelformat);
+	fmt = hantro_find_format(ctx, pix_mp->pixelformat);
 	if (!fmt) {
-		fmt = hantro_get_default_fmt(formats, num_fmts, coded);
+		fmt = hantro_get_default_fmt(ctx, coded);
 		f->fmt.pix_mp.pixelformat = fmt->fourcc;
 	}
 
@@ -306,12 +305,10 @@ hantro_reset_fmt(struct v4l2_pix_format_mplane *fmt,
 static void
 hantro_reset_encoded_fmt(struct hantro_ctx *ctx)
 {
-	const struct hantro_fmt *vpu_fmt, *formats;
+	const struct hantro_fmt *vpu_fmt;
 	struct v4l2_pix_format_mplane *fmt;
-	unsigned int num_fmts;
 
-	formats = hantro_get_formats(ctx, &num_fmts);
-	vpu_fmt = hantro_get_default_fmt(formats, num_fmts, true);
+	vpu_fmt = hantro_get_default_fmt(ctx, true);
 
 	if (hantro_is_encoder_ctx(ctx)) {
 		ctx->vpu_dst_fmt = vpu_fmt;
@@ -332,12 +329,10 @@ hantro_reset_encoded_fmt(struct hantro_ctx *ctx)
 static void
 hantro_reset_raw_fmt(struct hantro_ctx *ctx)
 {
-	const struct hantro_fmt *raw_vpu_fmt, *formats;
+	const struct hantro_fmt *raw_vpu_fmt;
 	struct v4l2_pix_format_mplane *raw_fmt, *encoded_fmt;
-	unsigned int num_fmts;
 
-	formats = hantro_get_formats(ctx, &num_fmts);
-	raw_vpu_fmt = hantro_get_default_fmt(formats, num_fmts, false);
+	raw_vpu_fmt = hantro_get_default_fmt(ctx, false);
 
 	if (hantro_is_encoder_ctx(ctx)) {
 		ctx->vpu_src_fmt = raw_vpu_fmt;
@@ -384,8 +379,6 @@ vidioc_s_fmt_out_mplane(struct file *file, void *priv, struct v4l2_format *f)
 	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
 	struct hantro_ctx *ctx = fh_to_ctx(priv);
 	struct vb2_queue *vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
-	const struct hantro_fmt *formats;
-	unsigned int num_fmts;
 	int ret;
 
 	ret = vidioc_try_fmt_out_mplane(file, priv, f);
@@ -421,9 +414,7 @@ vidioc_s_fmt_out_mplane(struct file *file, void *priv, struct v4l2_format *f)
 			return -EBUSY;
 	}
 
-	formats = hantro_get_formats(ctx, &num_fmts);
-	ctx->vpu_src_fmt = hantro_find_format(formats, num_fmts,
-					      pix_mp->pixelformat);
+	ctx->vpu_src_fmt = hantro_find_format(ctx, pix_mp->pixelformat);
 	ctx->src_fmt = *pix_mp;
 
 	/*
@@ -457,9 +448,7 @@ static int vidioc_s_fmt_cap_mplane(struct file *file, void *priv,
 {
 	struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
 	struct hantro_ctx *ctx = fh_to_ctx(priv);
-	const struct hantro_fmt *formats;
 	struct vb2_queue *vq;
-	unsigned int num_fmts;
 	int ret;
 
 	/* Change not allowed if queue is busy. */
@@ -488,9 +477,7 @@ static int vidioc_s_fmt_cap_mplane(struct file *file, void *priv,
 	if (ret)
 		return ret;
 
-	formats = hantro_get_formats(ctx, &num_fmts);
-	ctx->vpu_dst_fmt = hantro_find_format(formats, num_fmts,
-					      pix_mp->pixelformat);
+	ctx->vpu_dst_fmt = hantro_find_format(ctx, pix_mp->pixelformat);
 	ctx->dst_fmt = *pix_mp;
 
 	/*