[PATCH v3 2/2] fbcon: expose cursor blink interval via sysfs
From: Scot Doyle <hidden>
Date: 2015-01-26 20:43:57
Also in:
lkml
Subsystem:
console subsystem, framebuffer layer, the rest · Maintainers:
Greg Kroah-Hartman, Helge Deller, Linus Torvalds
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 <redacted> --- drivers/video/console/fbcon.c | 79 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+)
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index 7a2030b..19620d2 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c@@ -3495,11 +3495,90 @@ err: return count; } +static ssize_t show_cursor_blink_ms(struct device *device, + struct device_attribute *attr, char *buf) +{ + struct fb_info *info; + struct fbcon_ops *ops; + int idx, ms = -1; + + if (fbcon_has_exited) { + pr_err("%s: framebuffer console exited", __func__); + return 0; + } + + console_lock(); + idx = con2fb_map[fg_console]; + + if (idx = -1 || registered_fb[idx] = NULL) { + pr_err("%s: no console to framebuffer mapping", __func__); + goto err; + } + + info = registered_fb[idx]; + + if ((ops = info->fbcon_par) = NULL) { + pr_err("%s: framebuffer has no device info", __func__); + goto err; + } + + ms = jiffies_to_msecs(ops->blink_jiffies); + +err: + console_unlock(); + return snprintf(buf, PAGE_SIZE, "%d\n", ms); +} + +static ssize_t store_cursor_blink_ms(struct device *device, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct fb_info *info; + struct fbcon_ops *ops; + int idx; + short ms; + + if (fbcon_has_exited) { + pr_err("%s: framebuffer console exited", __func__); + return count; + } + + console_lock(); + idx = con2fb_map[fg_console]; + + if (idx = -1 || registered_fb[idx] = NULL) { + pr_err("%s: no console to framebuffer mapping", __func__); + goto err; + } + + info = registered_fb[idx]; + + if ((ops = info->fbcon_par) = NULL) { + pr_err("%s: framebuffer has no device info", __func__); + goto err; + } + + if (!kstrtos16(buf, 0, &ms)) { + ops->blink_jiffies = max_t(int, msecs_to_jiffies(ms), 1); + if (info->queue.func = fb_flashcursor && + ops->flags & FBCON_FLAGS_CURSOR_TIMER) { + fbcon_del_cursor_timer(info); + fbcon_add_cursor_timer(info); + } + } + +err: + console_unlock(); + return count; +} + static struct device_attribute device_attrs[] = { __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, store_cursor_blink), + __ATTR(cursor_blink_ms, S_IRUGO|S_IWUSR, show_cursor_blink_ms, + store_cursor_blink_ms), }; static int fbcon_init_device(void)
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2.1.4