drm/panel: samsung-atna33xc20: Stop tracking prepared/enabled

As talked about in commit d2aacaf0 ("drm/panel: Check for already
prepared/enabled in drm_panel"), we want to remove needless code from
panel drivers that was storing and double-checking the
prepared/enabled state. Even if someone was relying on the
double-check before, that double-check is now in the core and not
needed in individual drivers.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240503143327.RFT.v2.24.Ibb4f923363a27167c480a432e52884b117221974@changeid

drivers/gpu/drm/panel/panel-samsung-atna33xc20.c

@@ -25,8 +25,6 @@
 
 struct atana33xc20_panel {
 	struct drm_panel base;
-	bool prepared;
-	bool enabled;
 	bool el3_was_on;
 
 	bool no_hpd;
@@ -143,13 +141,8 @@ static int atana33xc20_disable(struct drm_panel *panel)
 {
 	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
@@ -173,10 +166,6 @@ static int atana33xc20_enable(struct drm_panel *panel)
 {
 	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
@@ -195,20 +184,14 @@ static int atana33xc20_enable(struct drm_panel *panel)
 	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
@@ -220,26 +203,19 @@ static int atana33xc20_unprepare(struct drm_panel *panel)
 	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;
 }