struct atana33xc20_panel {
struct drm_panel base;
- bool prepared;
- bool enabled;
bool el3_was_on;
bool no_hpd;
{
struct atana33xc20_panel *p = to_atana33xc20(panel);
- /* Disabling when already disabled is a no-op */
- if (!p->enabled)
- return 0;
-
gpiod_set_value_cansleep(p->el_on3_gpio, 0);
p->el_on3_off_time = ktime_get_boottime();
- p->enabled = false;
/*
* Keep track of the fact that EL_ON3 was on but we haven't power
{
struct atana33xc20_panel *p = to_atana33xc20(panel);
- /* Enabling when already enabled is a no-op */
- if (p->enabled)
- return 0;
-
/*
* Once EL_ON3 drops we absolutely need a power cycle before the next
* enable or the backlight will never come on again. The code ensures
atana33xc20_wait(p->powered_on_time, 400);
gpiod_set_value_cansleep(p->el_on3_gpio, 1);
- p->enabled = true;
return 0;
}
static int atana33xc20_unprepare(struct drm_panel *panel)
{
- struct atana33xc20_panel *p = to_atana33xc20(panel);
int ret;
- /* Unpreparing when already unprepared is a no-op */
- if (!p->prepared)
- return 0;
-
/*
* Purposely do a put_sync, don't use autosuspend. The panel's tcon
* seems to sometimes crash when you stop giving it data and this is
ret = pm_runtime_put_sync_suspend(panel->dev);
if (ret < 0)
return ret;
- p->prepared = false;
return 0;
}
static int atana33xc20_prepare(struct drm_panel *panel)
{
- struct atana33xc20_panel *p = to_atana33xc20(panel);
int ret;
- /* Preparing when already prepared is a no-op */
- if (p->prepared)
- return 0;
-
ret = pm_runtime_get_sync(panel->dev);
if (ret < 0) {
pm_runtime_put_autosuspend(panel->dev);
return ret;
}
- p->prepared = true;
return 0;
}