Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932119AbbBYXed (ORCPT ); Wed, 25 Feb 2015 18:34:33 -0500 Received: from mx1.scotdoyle.com ([23.226.141.211]:35860 "EHLO mx1.scotdoyle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753263AbbBYXeb (ORCPT ); Wed, 25 Feb 2015 18:34:31 -0500 Date: Wed, 25 Feb 2015 23:32:00 +0000 (UTC) From: Scot Doyle To: Pavel Machek cc: Jean-Christophe Plagniol-Villard , Tomi Valkeinen , Geert Uytterhoeven , linux-fbdev@vger.kernel.org, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/2] fbcon: expose cursor blink interval via sysfs In-Reply-To: <20150225094946.GA24627@amd> Message-ID: References: <20150225094946.GA24627@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: 5102 Lines: 129 On Wed, 25 Feb 2015, Pavel Machek wrote: > On Mon 2015-01-26 20:41:53, Scot Doyle wrote: > > The fbcon cursor, when set to blink, is hardcoded to toggle display state > > five times per second. Expose this setting via > > /sys/class/graphics/fbcon/cursor_blink_ms > > > > Values written to the interface set the approximate time interval in > > milliseconds between cursor toggles, from 1 to 32767. Since the interval > > is stored internally as a number of jiffies, the millisecond value read > > from the interface may not exactly match the entered value. > > > > An outstanding blink timer is reset after a new value is entered. > > > > If the cursor blink is disabled, either via the 'cursor_blink' boolean > > setting or some other mechanism, the 'cursor_blink_ms' setting may still > > be modified. The new value will be used if the blink is reactivated. > > > > Signed-off-by: Scot Doyle > > Normally, this would be set by ansi escape sequences, no? We can hide > cursor using them, set its appearance.. makes sense to change timing > value there, too.... > Pavel Hi Pavel, what about something like this? For example, "echo -e '\033[16;500]' would set the blink interval to 500 milliseconds. The duration is stored twice to avoid locking the console in cursor_timer_handler(). diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 6e00572..f117966 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] > 0 && + 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/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index b972106..05b1d1a 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -402,7 +402,7 @@ static void cursor_timer_handler(unsigned long dev_addr) struct fbcon_ops *ops = info->fbcon_par; queue_work(system_power_efficient_wq, &info->queue); - mod_timer(&ops->cursor_timer, jiffies + HZ/5); + mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); } static void fbcon_add_cursor_timer(struct fb_info *info) @@ -417,7 +417,7 @@ static void fbcon_add_cursor_timer(struct fb_info *info) init_timer(&ops->cursor_timer); ops->cursor_timer.function = cursor_timer_handler; - ops->cursor_timer.expires = jiffies + HZ / 5; + ops->cursor_timer.expires = jiffies + ops->cur_blink_jiffies; ops->cursor_timer.data = (unsigned long ) info; add_timer(&ops->cursor_timer); ops->flags |= FBCON_FLAGS_CURSOR_TIMER; @@ -1309,9 +1309,9 @@ static void fbcon_cursor(struct vc_data *vc, int mode) if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) return; - if (vc->vc_cursor_type & 0x10) - fbcon_del_cursor_timer(info); - else + ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); + fbcon_del_cursor_timer(info); + if (!(vc->vc_cursor_type & 0x10)) fbcon_add_cursor_timer(info); ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; diff --git a/drivers/video/console/fbcon.h b/drivers/video/console/fbcon.h index 6bd2e0c..7aaa4ea 100644 --- a/drivers/video/console/fbcon.h +++ b/drivers/video/console/fbcon.h @@ -70,6 +70,7 @@ struct fbcon_ops { struct fb_cursor cursor_state; struct display *p; int currcon; /* Current VC. */ + int cur_blink_jiffies; int cursor_flash; int cursor_reset; int blank_state; 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 */ -- 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/