drm/omap: Remove enable checks from display .enable() and .remove()

The displays (connectors, panels and encoders) bail out from their
.enable() and .disable() handlers if the dss device is already enabled
or disabled. Those safety checks are not needed when the functions are
called through the omapdss_device_ops, as the .enable() and .disable()
handlers are called from the DRM atomic helpers that already guarantee
that no double enabling or disabling can occur.

However, the handlers are also called directly from the .remove()
handler. While this shouldn't be needed either as the modules can't be
removed as long as the device is in use, it's still a good practice to
disable the device explicitly. There is currently a safety check in
.remove() in some drivers but not all of them.

Remove the safety checks from the .enable() and .disable() handlers, and
add missing ones in the .remove() handler.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c b/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
index 5a06fbb7984a..0c5b405b4c9e 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-sharp-ls037v7dw01.c
@@ -97,9 +97,6 @@ static void sharp_ls_disable(struct omap_dss_device *dssdev)
 	struct panel_drv_data *ddata = to_panel_data(dssdev);
 	struct omap_dss_device *src = dssdev->src;
 
-	if (!omapdss_device_is_enabled(dssdev))
-		return;
-
 	if (ddata->ini_gpio)
 		gpiod_set_value_cansleep(ddata->ini_gpio, 0);
 
@@ -233,7 +230,8 @@ static int __exit sharp_ls_remove(struct platform_device *pdev)
 
 	omapdss_device_unregister(dssdev);
 
-	sharp_ls_disable(dssdev);
+	if (omapdss_device_is_enabled(dssdev))
+		sharp_ls_disable(dssdev);
 
 	return 0;
 }