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 Rockchip boards. The Rockchip driver appear to be correctly calling drm_atomic_helper_shutdown() so we can remove the calls. [1] https://lore.kernel.org/r/20230901234015.566018-1-diand...@chromium.org [2] https://lore.kernel.org/r/20230901234202.566951-1-diand...@chromium.org [3] https://lore.kernel.org/r/20230921192749.1542462-1-diand...@chromium.org Cc: Brian Norris <briannor...@chromium.org> Cc: Chris Zhong <z...@rock-chips.com> Cc: Nickey Yang <nickey.y...@rock-chips.com> Cc: "Heiko Stübner" <he...@sntech.de> Signed-off-by: Douglas Anderson <diand...@chromium.org> --- Changes in v2: - Only handle 1 panel per patch. - Split removal of prepared/enabled from handling of remove/shutdown. .../gpu/drm/panel/panel-kingdisplay-kd097d04.c | 17 ----------------- 1 file changed, 17 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c index 88d775e000d4..d6b912277196 100644 --- a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c +++ b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c @@ -389,14 +389,6 @@ static void kingdisplay_panel_remove(struct mipi_dsi_device *dsi) struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi); int err; - err = drm_panel_unprepare(&kingdisplay->base); - if (err < 0) - dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err); - - err = drm_panel_disable(&kingdisplay->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); @@ -404,14 +396,6 @@ static void kingdisplay_panel_remove(struct mipi_dsi_device *dsi) kingdisplay_panel_del(kingdisplay); } -static void kingdisplay_panel_shutdown(struct mipi_dsi_device *dsi) -{ - struct kingdisplay_panel *kingdisplay = mipi_dsi_get_drvdata(dsi); - - drm_panel_unprepare(&kingdisplay->base); - drm_panel_disable(&kingdisplay->base); -} - static struct mipi_dsi_driver kingdisplay_panel_driver = { .driver = { .name = "panel-kingdisplay-kd097d04", @@ -419,7 +403,6 @@ static struct mipi_dsi_driver kingdisplay_panel_driver = { }, .probe = kingdisplay_panel_probe, .remove = kingdisplay_panel_remove, - .shutdown = kingdisplay_panel_shutdown, }; module_mipi_dsi_driver(kingdisplay_panel_driver); -- 2.45.0.rc1.225.g2a3ae87e7f-goog
