Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755010AbbB0TQZ (ORCPT ); Fri, 27 Feb 2015 14:16:25 -0500 Received: from mx1.scotdoyle.com ([23.226.141.211]:42480 "EHLO mx1.scotdoyle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753340AbbB0TQX (ORCPT ); Fri, 27 Feb 2015 14:16:23 -0500 Date: Fri, 27 Feb 2015 19:13:48 +0000 (UTC) From: Scot Doyle To: Greg Kroah-Hartman , Jiri Slaby cc: Tomi Valkeinen , Jean-Christophe Plagniol-Villard , Michael Kerrisk , Pavel Machek , Geert Uytterhoeven , linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-api@vger.kernel.org, linux-man@vger.kernel.org Subject: [PATCH 1/2] vt: add cursor blink interval escape sequence In-Reply-To: Message-ID: References: <20150225094946.GA24627@amd> <20150226220243.GC9935@amd> User-Agent: Alpine 2.11 (LNX 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2678 Lines: 70 Add an escape sequence to specify the current console's cursor blink interval. The interval is specified as a number of milliseconds until the next cursor display state toggle, from 50 to 65535. /proc/loadavg did not show a difference with a one msec interval, but the lower bound is set to 50 msecs since slower hardware wasn't tested. Store the interval in the vc_data structure for later access by fbcon, initializing the value to fbcon's current hardcoded value of 200 msecs. Signed-off-by: Scot Doyle Acked-by: Pavel Machek --- drivers/tty/vt/vt.c | 9 +++++++++ include/linux/console_struct.h | 1 + 2 files changed, 10 insertions(+) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 6e00572..ab1f173 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -135,6 +135,7 @@ const struct consw *conswitchp; */ #define DEFAULT_BELL_PITCH 750 #define DEFAULT_BELL_DURATION (HZ/8) +#define DEFAULT_CURSOR_BLINK_MS 200 struct vc vc_cons [MAX_NR_CONSOLES]; @@ -1590,6 +1591,13 @@ static void setterm_command(struct vc_data *vc) case 15: /* activate the previous console */ set_console(last_console); break; + case 16: /* set cursor blink duration in msec */ + if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 && + vc->vc_par[1] <= USHRT_MAX) + vc->vc_cur_blink_ms = vc->vc_par[1]; + else + vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; + break; } } @@ -1717,6 +1725,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear) vc->vc_bell_pitch = DEFAULT_BELL_PITCH; vc->vc_bell_duration = DEFAULT_BELL_DURATION; + vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS; gotoxy(vc, 0, 0); save_cur(vc); diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h index e859c98..e329ee2 100644 --- a/include/linux/console_struct.h +++ b/include/linux/console_struct.h @@ -104,6 +104,7 @@ struct vc_data { unsigned int vc_resize_user; /* resize request from user */ unsigned int vc_bell_pitch; /* Console bell pitch */ unsigned int vc_bell_duration; /* Console bell duration */ + unsigned short vc_cur_blink_ms; /* Cursor blink duration */ struct vc_data **vc_display_fg; /* [!] Ptr to var holding fg console for this display */ struct uni_pagedir *vc_uni_pagedir; struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */ -- 2.3.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/