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. Unfortunately, grepping mainline for this panel's compatible string shows no hits, so we can't be 100% sure if the DRM modeset driver used with this panel has been fixed. If it is found that the DRM modeset driver hasn't been fixed then this patch could be temporarily reverted until it is. [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: "Heiko Stübner" <heiko@xxxxxxxxx> 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-leadtek-ltk500hd1829.c | 17 ----------------- 1 file changed, 17 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c index ef27cab08f1d..6b18cf00fd4a 100644 --- a/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c +++ b/drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c @@ -662,27 +662,11 @@ static int ltk500hd1829_probe(struct mipi_dsi_device *dsi) return 0; } -static void ltk500hd1829_shutdown(struct mipi_dsi_device *dsi) -{ - struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi); - int ret; - - ret = drm_panel_unprepare(&ctx->panel); - if (ret < 0) - dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret); - - ret = drm_panel_disable(&ctx->panel); - if (ret < 0) - dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret); -} - static void ltk500hd1829_remove(struct mipi_dsi_device *dsi) { struct ltk500hd1829 *ctx = mipi_dsi_get_drvdata(dsi); int ret; - ltk500hd1829_shutdown(dsi); - ret = mipi_dsi_detach(dsi); if (ret < 0) dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret); @@ -710,7 +694,6 @@ static struct mipi_dsi_driver ltk500hd1829_driver = { }, .probe = ltk500hd1829_probe, .remove = ltk500hd1829_remove, - .shutdown = ltk500hd1829_shutdown, }; module_mipi_dsi_driver(ltk500hd1829_driver); -- 2.45.0.rc1.225.g2a3ae87e7f-goog
