linux-kernel - Re: [PATCH v8 1/3] media: tpg: change char argument to const char

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Message-ID: <94403bfb-6fb5-55b7-72ad-2e4afc74aa1e@collabora.com>
Date:   Tue, 30 Jun 2020 17:44:39 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     Kaaira Gupta <kgupta@...iitr.ac.in>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        hverkuil@...all.nl,
        Kieran Bingham <kieran.bingham@...asonboard.com>
Subject: Re: [PATCH v8 1/3] media: tpg: change char argument to const char



On 6/30/20 4:50 PM, Kaaira Gupta wrote:
> Change the argument of type char * to const char * for function
> tpg_gen_text().

I don't think it is required for this version, but it would be nicer
if you could add an explanation regarding why you are doing this change :)

> 
> Signed-off-by: Kaaira Gupta <kgupta@...iitr.ac.in>

lgtm

Reviewed-by: Helen Koike <helen.koike@...labora.com>

Thanks
Helen

> ---
>  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);
>