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. The compatible strings used by this driver seem to show up across boards using a variety of DRM drivers. It appears that the relevant drivers have been converted, but at least one compatible string doesn't seem to be found in any mainline dts files so we can't be 100% sure. 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: "Guido Günther" <agx@xxxxxxxxxxx> Cc: "Ondřej Jirman" <megi@xxxxxx> Cc: Chris Morgan <macromorgan@xxxxxxxxxxx> Cc: Frank Oltmanns <frank@xxxxxxxxxxxx> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx> --- Changes in v2: - Split removal of prepared/enabled from handling of remove/shutdown. drivers/gpu/drm/panel/panel-sitronix-st7703.c | 17 ----------------- 1 file changed, 17 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c index 6b2d940640ca..77b30e045a57 100644 --- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c +++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c @@ -937,27 +937,11 @@ static int st7703_probe(struct mipi_dsi_device *dsi) return 0; } -static void st7703_shutdown(struct mipi_dsi_device *dsi) -{ - struct st7703 *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 st7703_remove(struct mipi_dsi_device *dsi) { struct st7703 *ctx = mipi_dsi_get_drvdata(dsi); int ret; - st7703_shutdown(dsi); - ret = mipi_dsi_detach(dsi); if (ret < 0) dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret); @@ -981,7 +965,6 @@ MODULE_DEVICE_TABLE(of, st7703_of_match); static struct mipi_dsi_driver st7703_driver = { .probe = st7703_probe, .remove = st7703_remove, - .shutdown = st7703_shutdown, .driver = { .name = DRV_NAME, .of_match_table = st7703_of_match, -- 2.45.0.rc1.225.g2a3ae87e7f-goog
