linux-kernel - Re: [RFC PATCH v1 3/5] sticon: Allow to get max font width and height

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Date: Fri, 16 Feb 2024 08:10:15 +0100
From: Jiri Slaby <jirislaby@...nel.org>
To: Alexey Gladkov <legion@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [RFC PATCH v1 3/5] sticon: Allow to get max font width and height

On 15. 02. 24, 16:37, Alexey Gladkov wrote:
> Signed-off-by: Alexey Gladkov <legion@...nel.org>
> ---
>   drivers/video/console/sticon.c | 21 +++++++++++++++++++--
>   1 file changed, 19 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/video/console/sticon.c b/drivers/video/console/sticon.c
> index 992a4fa431aa..63368b3ff9c5 100644
> --- a/drivers/video/console/sticon.c
> +++ b/drivers/video/console/sticon.c
> @@ -56,6 +56,11 @@
>   #define BLANK 0
>   static int vga_is_gfx;
>   
> +#define STICON_MIN_FONT_WIDTH 6
> +#define STICON_MIN_FONT_HEIGHT 6
> +#define STICON_MAX_FONT_WIDTH 32
> +#define STICON_MAX_FONT_HEIGHT 32
> +
>   #define STI_DEF_FONT	sticon_sti->font
>   
>   /* borrowed from fbcon.c */
> @@ -180,8 +185,10 @@ static int sticon_set_font(struct vc_data *vc, struct console_font *op,
>   	struct sti_cooked_font *cooked_font;
>   	unsigned char *data = op->data, *p;
>   
> -	if ((w < 6) || (h < 6) || (w > 32) || (h > 32) || (vpitch != 32)
> -	    || (op->charcount != 256 && op->charcount != 512))
> +	if ((w < STICON_MIN_FONT_WIDTH) || (h < STICON_MIN_FONT_HEIGHT) ||
> +	    (w > STICON_MAX_FONT_WIDTH) || (h > STICON_MAX_FONT_HEIGHT) ||

Will
!in_range(w, STICON_MIN_FONT_WIDTH, STICON_MAX_FONT_WIDTH)
look better?

> +	    (vpitch != 32) ||
> +	    (op->charcount != 256 && op->charcount != 512))
>   		return -EINVAL;
>   	pitch = ALIGN(w, 8) / 8;
>   	bpc = pitch * h;
> @@ -273,6 +280,15 @@ static int sticon_font_set(struct vc_data *vc, struct console_font *font,
>   	return sticon_set_font(vc, font, vpitch);
>   }
>   
> +static int sticon_font_info(struct vc_data *vc, struct console_font *font)
> +{
> +	font->width = STICON_MAX_FONT_WIDTH;
> +	font->height = STICON_MAX_FONT_HEIGHT;
> +	font->charcount = 512;

Why not to have a macro for this constant?

> +
> +	return 0;
> +}
> +
>   static void sticon_init(struct vc_data *c, int init)
>   {
>       struct sti_struct *sti = sticon_sti;
> @@ -371,6 +387,7 @@ static const struct consw sti_con = {
>   	.con_scroll		= sticon_scroll,
>   	.con_switch		= sticon_switch,
>   	.con_blank		= sticon_blank,
> +	.con_font_info		= sticon_font_info,
>   	.con_font_set		= sticon_font_set,
>   	.con_font_default	= sticon_font_default,
>   	.con_build_attr		= sticon_build_attr,

-- 
js
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