Re: [PATCH 11/11] [media] coda: mark constant structures as such

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On 07/17/2014 06:05 PM, Philipp Zabel wrote:
> The format and codec lists and the ops structures are read-only.
> Mark them as const.
> 
> Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>

Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>

Regards,

	Hans

> ---
>  drivers/media/platform/coda.c | 38 +++++++++++++++++++-------------------
>  1 file changed, 19 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
> index ed5fa4c..b644f2b 100644
> --- a/drivers/media/platform/coda.c
> +++ b/drivers/media/platform/coda.c
> @@ -102,7 +102,7 @@ struct coda_codec {
>  struct coda_devtype {
>  	char			*firmware;
>  	enum coda_product	product;
> -	struct coda_codec	*codecs;
> +	const struct coda_codec	*codecs;
>  	unsigned int		num_codecs;
>  	size_t			workbuf_size;
>  	size_t			tempbuf_size;
> @@ -225,7 +225,7 @@ struct coda_ctx {
>  	u32				sequence_offset;
>  	struct coda_q_data		q_data[2];
>  	enum coda_inst_type		inst_type;
> -	struct coda_codec		*codec;
> +	const struct coda_codec		*codec;
>  	enum v4l2_colorspace		colorspace;
>  	struct coda_params		params;
>  	struct v4l2_ctrl_handler	ctrls;
> @@ -390,7 +390,7 @@ static struct coda_q_data *get_q_data(struct coda_ctx *ctx,
>  /*
>   * Array of all formats supported by any version of Coda:
>   */
> -static struct coda_fmt coda_formats[] = {
> +static const struct coda_fmt coda_formats[] = {
>  	{
>  		.name = "YUV 4:2:0 Planar, YCbCr",
>  		.fourcc = V4L2_PIX_FMT_YUV420,
> @@ -419,19 +419,19 @@ static struct coda_fmt coda_formats[] = {
>   *  i.MX6  -> coda960
>   * Use V4L2_PIX_FMT_YUV420 as placeholder for all supported YUV 4:2:0 variants
>   */
> -static struct coda_codec codadx6_codecs[] = {
> +static const struct coda_codec codadx6_codecs[] = {
>  	CODA_CODEC(CODADX6_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,  720, 576),
>  	CODA_CODEC(CODADX6_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4, 720, 576),
>  };
>  
> -static struct coda_codec coda7_codecs[] = {
> +static const struct coda_codec coda7_codecs[] = {
>  	CODA_CODEC(CODA7_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   1280, 720),
>  	CODA_CODEC(CODA7_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4,  1280, 720),
>  	CODA_CODEC(CODA7_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1080),
>  	CODA_CODEC(CODA7_MODE_DECODE_MP4,  V4L2_PIX_FMT_MPEG4,  V4L2_PIX_FMT_YUV420, 1920, 1080),
>  };
>  
> -static struct coda_codec coda9_codecs[] = {
> +static const struct coda_codec coda9_codecs[] = {
>  	CODA_CODEC(CODA9_MODE_ENCODE_H264, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_H264,   1920, 1080),
>  	CODA_CODEC(CODA9_MODE_ENCODE_MP4,  V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_MPEG4,  1920, 1080),
>  	CODA_CODEC(CODA9_MODE_DECODE_H264, V4L2_PIX_FMT_H264,   V4L2_PIX_FMT_YUV420, 1920, 1080),
> @@ -458,10 +458,10 @@ static u32 coda_format_normalize_yuv(u32 fourcc)
>  	return coda_format_is_yuv(fourcc) ? V4L2_PIX_FMT_YUV420 : fourcc;
>  }
>  
> -static struct coda_codec *coda_find_codec(struct coda_dev *dev, int src_fourcc,
> -					  int dst_fourcc)
> +static const struct coda_codec *coda_find_codec(struct coda_dev *dev,
> +						int src_fourcc, int dst_fourcc)
>  {
> -	struct coda_codec *codecs = dev->devtype->codecs;
> +	const struct coda_codec *codecs = dev->devtype->codecs;
>  	int num_codecs = dev->devtype->num_codecs;
>  	int k;
>  
> @@ -483,10 +483,10 @@ static struct coda_codec *coda_find_codec(struct coda_dev *dev, int src_fourcc,
>  }
>  
>  static void coda_get_max_dimensions(struct coda_dev *dev,
> -				    struct coda_codec *codec,
> +				    const struct coda_codec *codec,
>  				    int *max_w, int *max_h)
>  {
> -	struct coda_codec *codecs = dev->devtype->codecs;
> +	const struct coda_codec *codecs = dev->devtype->codecs;
>  	int num_codecs = dev->devtype->num_codecs;
>  	unsigned int w, h;
>  	int k;
> @@ -546,9 +546,9 @@ static int coda_enum_fmt(struct file *file, void *priv,
>  			 struct v4l2_fmtdesc *f)
>  {
>  	struct coda_ctx *ctx = fh_to_ctx(priv);
> -	struct coda_codec *codecs = ctx->dev->devtype->codecs;
> -	struct coda_fmt *formats = coda_formats;
> -	struct coda_fmt *fmt;
> +	const struct coda_codec *codecs = ctx->dev->devtype->codecs;
> +	const struct coda_fmt *formats = coda_formats;
> +	const struct coda_fmt *fmt;
>  	int num_codecs = ctx->dev->devtype->num_codecs;
>  	int num_formats = ARRAY_SIZE(coda_formats);
>  	int i, k, num = 0;
> @@ -621,7 +621,7 @@ static int coda_g_fmt(struct file *file, void *priv,
>  	return 0;
>  }
>  
> -static int coda_try_fmt(struct coda_ctx *ctx, struct coda_codec *codec,
> +static int coda_try_fmt(struct coda_ctx *ctx, const struct coda_codec *codec,
>  			struct v4l2_format *f)
>  {
>  	struct coda_dev *dev = ctx->dev;
> @@ -685,7 +685,7 @@ static int coda_try_fmt_vid_cap(struct file *file, void *priv,
>  				struct v4l2_format *f)
>  {
>  	struct coda_ctx *ctx = fh_to_ctx(priv);
> -	struct coda_codec *codec = NULL;
> +	const struct coda_codec *codec = NULL;
>  	struct vb2_queue *src_vq;
>  	int ret;
>  
> @@ -733,7 +733,7 @@ static int coda_try_fmt_vid_out(struct file *file, void *priv,
>  				struct v4l2_format *f)
>  {
>  	struct coda_ctx *ctx = fh_to_ctx(priv);
> -	struct coda_codec *codec;
> +	const struct coda_codec *codec;
>  
>  	/* Determine codec by encoded format, returns NULL if raw or invalid */
>  	codec = coda_find_codec(ctx->dev, f->fmt.pix.pixelformat,
> @@ -1531,7 +1531,7 @@ static void coda_unlock(void *m2m_priv)
>  	mutex_unlock(&pcdev->dev_mutex);
>  }
>  
> -static struct v4l2_m2m_ops coda_m2m_ops = {
> +static const struct v4l2_m2m_ops coda_m2m_ops = {
>  	.device_run	= coda_device_run,
>  	.job_ready	= coda_job_ready,
>  	.job_abort	= coda_job_abort,
> @@ -2805,7 +2805,7 @@ static int coda_s_ctrl(struct v4l2_ctrl *ctrl)
>  	return 0;
>  }
>  
> -static struct v4l2_ctrl_ops coda_ctrl_ops = {
> +static const struct v4l2_ctrl_ops coda_ctrl_ops = {
>  	.s_ctrl = coda_s_ctrl,
>  };
>  
> 

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