linux-kernel - Re: [PATCH v9 1/3] media: tpg: change char argument to const char

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Message-ID: <e7027fdf-de35-3c14-8e1a-9f0ba8a162ad@ideasonboard.com>
Date:   Thu, 2 Jul 2020 00:08:16 +0100
From:   Kieran Bingham <kieran.bingham@...asonboard.com>
To:     Kaaira Gupta <kgupta@...iitr.ac.in>,
        Helen Koike <helen.koike@...labora.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        hverkuil@...all.nl
Subject: Re: [PATCH v9 1/3] media: tpg: change char argument to const char

Hi Kaaira,

On 01/07/2020 14:29, Kaaira Gupta wrote:
> Change the argument of type char * to const char * for function
> tpg_gen_text().
> 
> This function should take in a const char pointer as opposed to a char
> * as there is no modification. This issue was found while passing the 
> order of colors of tpg generated test image (which is a const char *)
> to this function.
> 
> Signed-off-by: Kaaira Gupta <kgupta@...iitr.ac.in>
> Reviewed-by: Helen Koike <helen.koike@...labora.com>

Reviewed-by: Kieran Bingham <kieran.bingham@...asonboard.com>

> ---
>  drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 10 +++++-----
>  include/media/tpg/v4l2-tpg.h                  |  2 +-
>  2 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> index 50f1e0b28b25..dde22a4cbd6c 100644
> --- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> +++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
> @@ -1927,34 +1927,34 @@ typedef struct { u16 __; u8 _; } __packed x24;
>  
>  static noinline void tpg_print_str_2(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
>  			unsigned p, unsigned first, unsigned div, unsigned step,
> -			int y, int x, char *text, unsigned len)
> +			int y, int x, const char *text, unsigned len)
>  {
>  	PRINTSTR(u8);
>  }
>  
>  static noinline void tpg_print_str_4(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
>  			unsigned p, unsigned first, unsigned div, unsigned step,
> -			int y, int x, char *text, unsigned len)
> +			int y, int x, const char *text, unsigned len)
>  {
>  	PRINTSTR(u16);
>  }
>  
>  static noinline void tpg_print_str_6(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
>  			unsigned p, unsigned first, unsigned div, unsigned step,
> -			int y, int x, char *text, unsigned len)
> +			int y, int x, const char *text, unsigned len)
>  {
>  	PRINTSTR(x24);
>  }
>  
>  static noinline void tpg_print_str_8(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
>  			unsigned p, unsigned first, unsigned div, unsigned step,
> -			int y, int x, char *text, unsigned len)
> +			int y, int x, const char *text, unsigned len)
>  {
>  	PRINTSTR(u32);
>  }
>  
>  void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
> -		  int y, int x, char *text)
> +		  int y, int x, const char *text)
>  {
>  	unsigned step = V4L2_FIELD_HAS_T_OR_B(tpg->field) ? 2 : 1;
>  	unsigned div = step;
> diff --git a/include/media/tpg/v4l2-tpg.h b/include/media/tpg/v4l2-tpg.h
> index eb191e85d363..9749ed409856 100644
> --- a/include/media/tpg/v4l2-tpg.h
> +++ b/include/media/tpg/v4l2-tpg.h
> @@ -241,7 +241,7 @@ void tpg_log_status(struct tpg_data *tpg);
>  
>  void tpg_set_font(const u8 *f);
>  void tpg_gen_text(const struct tpg_data *tpg,
> -		u8 *basep[TPG_MAX_PLANES][2], int y, int x, char *text);
> +		u8 *basep[TPG_MAX_PLANES][2], int y, int x, const char *text);
>  void tpg_calc_text_basep(struct tpg_data *tpg,
>  		u8 *basep[TPG_MAX_PLANES][2], unsigned p, u8 *vbuf);
>  unsigned tpg_g_interleaved_plane(const struct tpg_data *tpg, unsigned buf_line);
> 

-- 
Regards
--
Kieran