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fb: use timeout instead of microdelay for restart logo

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Change-Id: I1cb192aae502ed917e757cf17f67a9a355d0059a
This commit is contained in:
Thomas Veerman 2013-02-21 17:03:30 +01:00
parent 2b793e4945
commit 67434e545b
1 changed files with 35 additions and 2 deletions
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37
drivers/fb/fb.c
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@ -2,6 +2,7 @@
#include <minix/chardriver.h>
#include <minix/drivers.h>
#include <minix/ds.h>
#include <minix/sysutil.h>
#include <minix/type.h>
#include <minix/vm.h>
#include <sys/ioc_fb.h>
@ -35,6 +36,7 @@ static int do_get_varscreeninfo(int minor, endpoint_t ep, cp_grant_id_t gid);
static int do_put_varscreeninfo(int minor, endpoint_t ep, cp_grant_id_t gid);
static int do_get_fixscreeninfo(int minor, endpoint_t ep, cp_grant_id_t gid);
static int do_pan_display(int minor, endpoint_t ep, cp_grant_id_t gid);
static int keep_displaying_restarted(void);
/* SEF functions and variables. */
static void sef_local_startup(void);
@ -60,6 +62,7 @@ static struct chardriver fb_tab =
/** Represents the /dev/fb device. */
static struct device fb_device[FB_DEV_NR];
static int fb_minor, has_restarted = 0;
static u64_t has_restarted_t1, has_restarted_t2;
static int open_counter[FB_DEV_NR]; /* Open count */
@ -74,8 +77,8 @@ fb_open(message *m)
open_counter[m->DEVICE]++;
if (!initialized) {
if (has_restarted) {
read_frclock_64(&has_restarted_t1);
paint_restartlogo(m->DEVICE);
has_restarted = 0;
} else {
paint_bootlogo(m->DEVICE);
}
@ -211,6 +214,10 @@ do_put_varscreeninfo(int minor, endpoint_t ep, cp_grant_id_t gid)
int r;
struct fb_var_screeninfo fbvs_copy;
if (has_restarted && keep_displaying_restarted()) {
return EAGAIN;
}
if ((r = sys_safecopyfrom(ep, gid, 0, (vir_bytes) &fbvs_copy,
sizeof(fbvs_copy))) != OK) {
return r;
@ -225,6 +232,10 @@ do_pan_display(int minor, endpoint_t ep, cp_grant_id_t gid)
int r;
struct fb_var_screeninfo fbvs_copy;
if (has_restarted && keep_displaying_restarted()) {
return EAGAIN;
}
if ((r = sys_safecopyfrom(ep, gid, 0, (vir_bytes) &fbvs_copy,
sizeof(fbvs_copy))) != OK) {
return r;
@ -267,6 +278,10 @@ fb_do_write(endpoint_t ep, iovec_t *iov, int minor, u64_t pos, size_t *io_bytes)
return OK;
}
if (has_restarted && keep_displaying_restarted()) {
return EAGAIN;
}
return sys_safecopyfrom(ep, (cp_grant_id_t) iov->iov_addr, 0,
(vir_bytes) (dev.dv_base + ex64lo(pos)),
*io_bytes);
@ -355,6 +370,25 @@ main(void)
return OK;
}
static int
keep_displaying_restarted()
{
u64_t delta;
u32_t micro_delta;
read_frclock_64(&has_restarted_t2);
delta = delta_frclock_64(has_restarted_t1, has_restarted_t2);
micro_delta = frclock_64_to_micros(delta);
#define DISPLAY_1SEC 1000000 /* 1 second in microseconds */
if (micro_delta < DISPLAY_1SEC) {
return 1;
}
has_restarted = 0;
return 0;
}
static void
paint_bootlogo(int minor)
{
@ -366,7 +400,6 @@ paint_restartlogo(int minor)
{
paint_centered(minor, restartlogo_data, restartlogo_width,
restartlogo_height);
micro_delay(1 * 1000000); /* 1 second */
}
static void