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media: cedrus: Add helper for determining number of elements

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Now that controls can be dynamic arrays, we need to know how many
elements are in such array. Add a helper for that.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.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@kernel.org>
This commit is contained in:
Jernej Skrabec 2022-06-20 18:55:16 +01:00 committed by Mauro Carvalho Chehab
parent 0ede8c820a
commit c6618d2789
2 changed files with 12 additions and 0 deletions
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11
drivers/staging/media/sunxi/cedrus/cedrus.c
View file

@ -232,6 +232,17 @@ void *cedrus_find_control_data(struct cedrus_ctx *ctx, u32 id)
return NULL; return NULL;
} }
u32 cedrus_get_num_of_controls(struct cedrus_ctx *ctx, u32 id)
{
unsigned int i;
for (i = 0; ctx->ctrls[i]; i++)
if (ctx->ctrls[i]->id == id)
return ctx->ctrls[i]->elems;
return 0;
}
static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx) static int cedrus_init_ctrls(struct cedrus_dev *dev, struct cedrus_ctx *ctx)
{ {
struct v4l2_ctrl_handler *hdl = &ctx->hdl; struct v4l2_ctrl_handler *hdl = &ctx->hdl;

1
drivers/staging/media/sunxi/cedrus/cedrus.h
View file

@ -261,5 +261,6 @@ vb2_to_cedrus_buffer(const struct vb2_buffer *p)
} }
void *cedrus_find_control_data(struct cedrus_ctx *ctx, u32 id); void *cedrus_find_control_data(struct cedrus_ctx *ctx, u32 id);
u32 cedrus_get_num_of_controls(struct cedrus_ctx *ctx, u32 id);
#endif #endif