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tty: vt: define an enum for CSI+J codes

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Decrypt the constant values by proper enum names. This time in csi_J().

Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Tested-by: Helge Deller <deller@gmx.de> # parisc STI console
Link: https://lore.kernel.org/r/20240122110401.7289-12-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiri Slaby (SUSE)
2024-01-22 12:03:25 +01:00
committed by Greg Kroah-Hartman
parent 76ec3a7a51
commit 4b8f936185
1 changed files with 15 additions and 8 deletions
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23
drivers/tty/vt/vt.c
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@@ -1498,13 +1498,20 @@ static inline void del(struct vc_data *vc)
/* ignored */
}
static void csi_J(struct vc_data *vc, int vpar)
enum CSI_J {
CSI_J_CURSOR_TO_END = 0,
CSI_J_START_TO_CURSOR = 1,
CSI_J_VISIBLE = 2,
CSI_J_FULL = 3,
};
static void csi_J(struct vc_data *vc, enum CSI_J vpar)
{
unsigned int count;
unsigned short * start;
switch (vpar) {
case 0: /* erase from cursor to end of display */
case CSI_J_CURSOR_TO_END:
vc_uniscr_clear_line(vc, vc->state.x,
vc->vc_cols - vc->state.x);
vc_uniscr_clear_lines(vc, vc->state.y + 1,
@@ -1512,16 +1519,16 @@ static void csi_J(struct vc_data *vc, int vpar)
count = (vc->vc_scr_end - vc->vc_pos) >> 1;
start = (unsigned short *)vc->vc_pos;
break;
case 1: /* erase from start to cursor */
case CSI_J_START_TO_CURSOR:
vc_uniscr_clear_line(vc, 0, vc->state.x + 1);
vc_uniscr_clear_lines(vc, 0, vc->state.y);
count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
start = (unsigned short *)vc->vc_origin;
break;
case 3: /* include scrollback */
case CSI_J_FULL:
flush_scrollback(vc);
fallthrough;
case 2: /* erase whole display */
case CSI_J_VISIBLE:
vc_uniscr_clear_lines(vc, 0, vc->vc_rows);
count = vc->vc_cols * vc->vc_rows;
start = (unsigned short *)vc->vc_origin;
@@ -2110,7 +2117,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
gotoxy(vc, 0, 0);
save_cur(vc);
if (do_clear)
csi_J(vc, 2);
csi_J(vc, CSI_J_VISIBLE);
}
static void vc_setGx(struct vc_data *vc, unsigned int which, int c)
@@ -2526,7 +2533,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
/* DEC screen alignment test. kludge :-) */
vc->vc_video_erase_char =
(vc->vc_video_erase_char & 0xff00) | 'E';
csi_J(vc, 2);
csi_J(vc, CSI_J_VISIBLE);
vc->vc_video_erase_char =
(vc->vc_video_erase_char & 0xff00) | ' ';
do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
@@ -3498,7 +3505,7 @@ static int __init con_init(void)
set_origin(vc);
save_screen(vc);
gotoxy(vc, vc->state.x, vc->state.y);
csi_J(vc, 0);
csi_J(vc, CSI_J_CURSOR_TO_END);
update_screen(vc);
pr_info("Console: %s %s %dx%d\n",
vc->vc_can_do_color ? "colour" : "mono",