drm/panel: osd-osd101t2587-53ts: 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.

Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240604172305.v3.7.Ic7f6b4ae48027668940a756090cfc454645d3da4@changeidSigned-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240604172305.v3.7.Ic7f6b4ae48027668940a756090cfc454645d3da4@changeid

drivers/gpu/drm/panel/panel-osd-osd101t2587-53ts.c

@@ -21,9 +21,6 @@ struct osd101t2587_panel {
 
 	struct regulator *supply;
 
-	bool prepared;
-	bool enabled;
-
 	const struct drm_display_mode *default_mode;
 };
 
@@ -37,13 +34,8 @@ static int osd101t2587_panel_disable(struct drm_panel *panel)
 	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
 	int ret;
 
-	if (!osd101t2587->enabled)
-		return 0;
-
 	ret = mipi_dsi_shutdown_peripheral(osd101t2587->dsi);
 
-	osd101t2587->enabled = false;
-
 	return ret;
 }
 
@@ -51,11 +43,7 @@ static int osd101t2587_panel_unprepare(struct drm_panel *panel)
 {
 	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
 
-	if (!osd101t2587->prepared)
-		return 0;
-
 	regulator_disable(osd101t2587->supply);
-	osd101t2587->prepared = false;
 
 	return 0;
 }
@@ -63,16 +51,8 @@ static int osd101t2587_panel_unprepare(struct drm_panel *panel)
 static int osd101t2587_panel_prepare(struct drm_panel *panel)
 {
 	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
-	int ret;
 
-	if (osd101t2587->prepared)
-		return 0;
-
-	ret = regulator_enable(osd101t2587->supply);
-	if (!ret)
-		osd101t2587->prepared = true;
-
-	return ret;
+	return regulator_enable(osd101t2587->supply);
 }
 
 static int osd101t2587_panel_enable(struct drm_panel *panel)
@@ -80,15 +60,10 @@ static int osd101t2587_panel_enable(struct drm_panel *panel)
 	struct osd101t2587_panel *osd101t2587 = ti_osd_panel(panel);
 	int ret;
 
-	if (osd101t2587->enabled)
-		return 0;
-
 	ret = mipi_dsi_turn_on_peripheral(osd101t2587->dsi);
 	if (ret)
 		return ret;
 
-	osd101t2587->enabled = true;
-
 	return ret;
 }