[PATCH 4/7] drm/bridge: analogic_dp: drop panel_lock

Dmitry Baryshkov
2025-04-01T05:12:04Z

The analogix_dp_prepare_panel() function is called from bridge's
atomic_pre_enable() and atomic_post_disable() callbacks, which can not
happen simultaneously. Drop the useless mutex.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 5 -----
drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 2 --
2 files changed, 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 704c6169116eb2601d2ad02dc7294455ceff5460..1ec4d277fe6bb03ad9eb8451ae2af5ad5ada0978 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -974,14 +974,11 @@ static int analogix_dp_prepare_panel(struct analogix_dp_device *dp,
if (!dp->plat_data->panel)
return 0;

- mutex_lock(&dp->panel_lock);
-
if (prepare)
ret = drm_panel_prepare(dp->plat_data->panel);
else
ret = drm_panel_unprepare(dp->plat_data->panel);

- mutex_unlock(&dp->panel_lock);
return ret;
}

@@ -1523,8 +1520,6 @@ analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
dp->dev = &pdev->dev;
dp->dpms_mode = DRM_MODE_DPMS_OFF;

- mutex_init(&dp->panel_lock);
-
/*
* platform dp driver need containor_of the plat_data to get
* the driver private data, so we need to store the point of
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
index b679d5b71d276f458d905c936160f107225bc6c5..2b54120ba4a3ef55af518a0629a5c8469f275a0f 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h
@@ -169,8 +169,6 @@ struct analogix_dp_device {
bool fast_train_enable;
bool psr_supported;

- struct mutex panel_lock;
-
struct analogix_dp_plat_data *plat_data;
};

--
2.39.5