From: Maxime Ripard <maxime@cerno.tech> To: Daniel Vetter <daniel.vetter@intel.com>, David Airlie <airlied@linux.ie>, Maarten Lankhorst <maarten.lankhorst@linux.intel.com>, Thomas Zimmermann <tzimmermann@suse.de>, Maxime Ripard <maxime@cerno.tech> Cc: dri-devel@lists.freedesktop.org, Stephen Rothwell <sfr@canb.auug.org.au> Subject: [PATCH] drm/bridge: Move devm_drm_of_get_bridge to bridge/panel.c Date: Fri, 17 Sep 2021 20:09:25 +0200 [thread overview] Message-ID: <20210917180925.2602266-1-maxime@cerno.tech> (raw) By depending on devm_drm_panel_bridge_add(), devm_drm_of_get_bridge() introduces a circular dependency between the modules drm (where devm_drm_of_get_bridge() ends up) and drm_kms_helper (where devm_drm_panel_bridge_add() is). Fix this by moving devm_drm_of_get_bridge() to bridge/panel.c and thus drm_kms_helper. Fixes: 87ea95808d53 ("drm/bridge: Add a function to abstract away panels") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Maxime Ripard <maxime@cerno.tech> --- Hi Stephen, I think it fixes the issue, but couldn't reproduce it here with my config for some reason. Let me know if it works for you. Maxime --- drivers/gpu/drm/bridge/panel.c | 36 ++++++++++++++++++++++++++++++++++ drivers/gpu/drm/drm_bridge.c | 34 -------------------------------- 2 files changed, 36 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c index c916f4b8907e..285a079cdef5 100644 --- a/drivers/gpu/drm/bridge/panel.c +++ b/drivers/gpu/drm/bridge/panel.c @@ -332,3 +332,39 @@ struct drm_connector *drm_panel_bridge_connector(struct drm_bridge *bridge) return &panel_bridge->connector; } EXPORT_SYMBOL(drm_panel_bridge_connector); + +#ifdef CONFIG_OF +/** + * devm_drm_of_get_bridge - Return next bridge in the chain + * @dev: device to tie the bridge lifetime to + * @np: device tree node containing encoder output ports + * @port: port in the device tree node + * @endpoint: endpoint in the device tree node + * + * Given a DT node's port and endpoint number, finds the connected node + * and returns the associated bridge if any, or creates and returns a + * drm panel bridge instance if a panel is connected. + * + * Returns a pointer to the bridge if successful, or an error pointer + * otherwise. + */ +struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, + struct device_node *np, + u32 port, u32 endpoint) +{ + struct drm_bridge *bridge; + struct drm_panel *panel; + int ret; + + ret = drm_of_find_panel_or_bridge(np, port, endpoint, + &panel, &bridge); + if (ret) + return ERR_PTR(ret); + + if (panel) + bridge = devm_drm_panel_bridge_add(dev, panel); + + return bridge; +} +EXPORT_SYMBOL(devm_drm_of_get_bridge); +#endif diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 4c68733fa660..7ee29f073857 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -1232,40 +1232,6 @@ struct drm_bridge *of_drm_find_bridge(struct device_node *np) return NULL; } EXPORT_SYMBOL(of_drm_find_bridge); - -/** - * devm_drm_of_get_bridge - Return next bridge in the chain - * @dev: device to tie the bridge lifetime to - * @np: device tree node containing encoder output ports - * @port: port in the device tree node - * @endpoint: endpoint in the device tree node - * - * Given a DT node's port and endpoint number, finds the connected node - * and returns the associated bridge if any, or creates and returns a - * drm panel bridge instance if a panel is connected. - * - * Returns a pointer to the bridge if successful, or an error pointer - * otherwise. - */ -struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, - struct device_node *np, - u32 port, u32 endpoint) -{ - struct drm_bridge *bridge; - struct drm_panel *panel; - int ret; - - ret = drm_of_find_panel_or_bridge(np, port, endpoint, - &panel, &bridge); - if (ret) - return ERR_PTR(ret); - - if (panel) - bridge = devm_drm_panel_bridge_add(dev, panel); - - return bridge; -} -EXPORT_SYMBOL(devm_drm_of_get_bridge); #endif MODULE_AUTHOR("Ajay Kumar <ajaykumar.rs@samsung.com>"); -- 2.31.1
next reply other threads:[~2021-09-17 18:09 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-09-17 18:09 Maxime Ripard [this message] 2021-09-20 8:08 ` Thomas Zimmermann 2021-09-20 20:49 ` Heiko Stübner 2021-09-22 8:22 ` Maxime Ripard
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