drm/panel: sharp-lq101r1sx01: Don't call disable at shutdown/remove

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

Cc: Thierry Reding <treding@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20240604172305.v3.18.I6a87fce1ee027c96f71c7adf74248b865f50b336@changeid
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240604172305.v3.18.I6a87fce1ee027c96f71c7adf74248b865f50b336@changeid

diff --git a/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c b/drivers/gpu/drm/panel/panel-sharp-lq101r1sx01.c
index 8f6c21b99522e9feb97472d5b68ab7c7a051b222..edc9425bb1434c0aafe156eb1cda9dd068b48e4a 100644 (file)
--- 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);