linux-kernel - [RFC PATCH v2 3/5] sticon: Allow to get max font width and height

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Date: Mon, 26 Feb 2024 16:21:12 +0100
From: Alexey Gladkov <legion@...nel.org>
To: LKML <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>
Cc: linux-api@...r.kernel.org
Subject: [RFC PATCH v2 3/5] sticon: Allow to get max font width and height

Signed-off-by: Alexey Gladkov <legion@...nel.org>
---
 drivers/video/console/sticon.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/video/console/sticon.c b/drivers/video/console/sticon.c
index 992a4fa431aa..d32ca458eb77 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 (!in_range(w, STICON_MIN_FONT_WIDTH, STICON_MAX_FONT_WIDTH) ||
+	    !in_range(h, STICON_MIN_FONT_HEIGHT, STICON_MAX_FONT_HEIGHT) ||
+	    (vpitch != 32) ||
+	    (op->charcount != 256 && op->charcount != 512))
 		return -EINVAL;
 	pitch = ALIGN(w, 8) / 8;
 	bpc = pitch * h;
@@ -273,6 +280,19 @@ 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_info *info)
+{
+	info->min_width = STICON_MIN_FONT_WIDTH;
+	info->min_height = STICON_MIN_FONT_HEIGHT;
+
+	info->max_width = STICON_MAX_FONT_WIDTH;
+	info->max_height = STICON_MAX_FONT_HEIGHT;
+
+	info->flags = KD_FONT_INFO_FLAG_LOW_SIZE | KD_FONT_INFO_FLAG_HIGH_SIZE;
+
+	return 0;
+}
+
 static void sticon_init(struct vc_data *c, int init)
 {
     struct sti_struct *sti = sticon_sti;
@@ -371,6 +391,7 @@ 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,
-- 
2.44.0