Why IMX8QXP spend too much time to Initialization ldb ?
should can we delete the delay time ?or decrease the time ? the code is follow：
static const struct panel_desc jdi_tx26d202vm0bwa = {
.timings = &jdi_tx26d202vm0bwa_timing,
.num_timings = 1,
.bpc = 8,
.size = {
.width = 300,
.height = 150,
},
.delay = {
/*
* The panel spec recommends one second delay
* to the below items. However, it's a bit too
* long in pratical. Based on tests, it turns
* out 100 milliseconds is fine.
*/
.prepare = 100,
.enable = 100,
.unprepare = 100,
.disable = 100,
},
.bus_format = MEDIA_BUS_FMT_ARGB8888_1X32,//MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
};
static int panel_simple_prepare(struct drm_panel *panel)
{
struct panel_simple *p = to_panel_simple(panel);
int err;
if (p->prepared)
return 0;
err = regulator_enable(p->supply);
if (err < 0) {
dev_err(panel->dev, "failed to enable supply: %d\n", err);
return err;
}
if (p->enable_gpio)
gpiod_set_value_cansleep(p->enable_gpio, 1);
printk("%s===========\n",__FUNCTION__);
if (p->desc->delay.prepare)
msleep(p->desc->delay.prepare);
printk("%s============p->desc->delay.prepare=%u\n",__FUNCTION__,p->desc->delay.prepare);
p->prepared = true;
return 0;
}
console log:
.....
[ 0.404633] panel_simple_prepare===========
[ 0.511409] panel_simple_prepare============p->desc->delay.prepare=100
.....
why delay 100ms ? can we decrease it to 10ms or less?
I replace msleep(p->desc->delay.prepare) with msleep(10) ，the OS could startup normally and the
lvds can show normal, Is there any problem ?Anyone could help me ?
