[PATCH v3 20/24] drm/panel: sharp-ls043t1le01: Don't call disable at shutdown/remove

From: Douglas Anderson
Date: Tue Jun 04 2024 - 20:29:09 EST


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 Qualcomm boards. The Qualcomm 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: Werner Johansson <werner.johansson@xxxxxxxxxxxxxx>
Cc: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Acked-by: Maxime Ripard <mripard@xxxxxxxxxx>
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
---

(no changes since v2)

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

drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c | 12 ------------
1 file changed, 12 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
index c86337954ad7..729cbb0d8403 100644
--- a/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
+++ b/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
@@ -267,10 +267,6 @@ static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
int ret;

- ret = drm_panel_disable(&sharp_nt->base);
- if (ret < 0)
- dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);
-
ret = mipi_dsi_detach(dsi);
if (ret < 0)
dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
@@ -278,13 +274,6 @@ static void sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
sharp_nt_panel_del(sharp_nt);
}

-static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
-{
- struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
-
- drm_panel_disable(&sharp_nt->base);
-}
-
static const struct of_device_id sharp_nt_of_match[] = {
{ .compatible = "sharp,ls043t1le01-qhd", },
{ }
@@ -298,7 +287,6 @@ static struct mipi_dsi_driver sharp_nt_panel_driver = {
},
.probe = sharp_nt_panel_probe,
.remove = sharp_nt_panel_remove,
- .shutdown = sharp_nt_panel_shutdown,
};
module_mipi_dsi_driver(sharp_nt_panel_driver);

--
2.45.1.288.g0e0cd299f1-goog