[RFT PATCH v2 39/48] drm/panel: sharp-lq101r1sx01: Don't call disable at shutdown/remove

[Douglas Anderson]

It's the responsibility of a correctly written DRM modeset driver to
call drm_atomic_helper_shutdown() at shutdown time and that should be
disabling / unpreparing the panel if needed. Panel drivers shouldn't
be calling these functions themselves.

A recent effort was made to fix as many DRM modeset drivers as
possible [1] [2] [3] and most drivers are fixed now.

A grep through mainline for compatible strings used by this driver
indicates that it is used by Tegra boards. The Tegra driver appears to
be correctly calling drm_atomic_helper_shutdown() so we can remove the
calls.

[1] https://lore.kernel.org/r/20230901234015.566018-1-dianders@xxxxxxxxxxxx
[2] https://lore.kernel.org/r/20230901234202.566951-1-dianders@xxxxxxxxxxxx
[3] https://lore.kernel.org/r/20230921192749.1542462-1-dianders@xxxxxxxxxxxx

Cc: Thierry Reding <treding@xxxxxxxxxx>
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
---

Changes in v2:
- Only handle 1 panel per patch.
- Split removal of prepared/enabled from handling of remove/shutdown.

 .../gpu/drm/panel/panel-sharp-lq101r1sx01.c   | 24 ++-----------------
 1 file changed, 2 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
index 8f6c21b99522..edc9425bb143 100644
--- a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
@@ -357,32 +357,13 @@ static void sharp_panel_remove(struct mipi_dsi_device *dsi)
 	struct sharp_panel *sharp = mipi_dsi_get_drvdata(dsi);
 	int err;
 
-	/* only detach from host for the DSI-LINK2 interface */
-	if (!sharp) {
-		mipi_dsi_detach(dsi);
-		return;
-	}
-
-	err = drm_panel_disable(&sharp->base);
-	if (err < 0)
-		dev_err(&dsi->dev, "failed to disable panel: %d\n", err);
-
 	err = mipi_dsi_detach(dsi);
 	if (err < 0)
 		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
 
-	sharp_panel_del(sharp);
-}
-
-static void sharp_panel_shutdown(struct mipi_dsi_device *dsi)
-{
-	struct sharp_panel *sharp = mipi_dsi_get_drvdata(dsi);
-
-	/* nothing to do for DSI-LINK2 */
+	/* only detach from host for the DSI-LINK2 interface */
 	if (!sharp)
-		return;
-
-	drm_panel_disable(&sharp->base);
+		sharp_panel_del(sharp);
 }
 
 static struct mipi_dsi_driver sharp_panel_driver = {
@@ -392,7 +373,6 @@ static struct mipi_dsi_driver sharp_panel_driver = {
 	},
 	.probe = sharp_panel_probe,
 	.remove = sharp_panel_remove,
-	.shutdown = sharp_panel_shutdown,
 };
 module_mipi_dsi_driver(sharp_panel_driver);
 
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog