| Message ID | 20230126144427.607098-3-jagan@amarulasolutions.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | drm: Add Samsung MIPI DSIM bridge | expand |
On Thu, Jan 26, 2023 at 08:14:11PM +0530, Jagan Teki wrote: > Add devm OF helper to return the next DSI bridge in the chain. > > Unlike general bridge return helper devm_drm_of_get_bridge, this > helper uses the dsi specific panel_or_bridge helper to find the > next DSI device in the pipeline. > > Helper lookup a given child DSI node or a DT node's port and > endpoint number, find the connected node and return either > the associated struct drm_panel or drm_bridge device. > > Cc: Maxime Ripard <mripard@kernel.org> > Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com> > Cc: Linus Walleij <linus.walleij@linaro.org> > Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> > --- > Changes for v12, v11: > - none > Changes for v10: > - new patch I sent you an email earlier today telling you to change this. Maxime
On Thu, Jan 26, 2023 at 8:17 PM Maxime Ripard <maxime@cerno.tech> wrote: > > On Thu, Jan 26, 2023 at 08:14:11PM +0530, Jagan Teki wrote: > > Add devm OF helper to return the next DSI bridge in the chain. > > > > Unlike general bridge return helper devm_drm_of_get_bridge, this > > helper uses the dsi specific panel_or_bridge helper to find the > > next DSI device in the pipeline. > > > > Helper lookup a given child DSI node or a DT node's port and > > endpoint number, find the connected node and return either > > the associated struct drm_panel or drm_bridge device. > > > > Cc: Maxime Ripard <mripard@kernel.org> > > Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com> > > Cc: Linus Walleij <linus.walleij@linaro.org> > > Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> > > Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> > > --- > > Changes for v12, v11: > > - none > > Changes for v10: > > - new patch > > I sent you an email earlier today telling you to change this. Ohh. Missed it, I will respond to that thread. Thanks, Jagan.
diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c index e8aae3cdc73d..be281eb26356 100644 --- a/drivers/gpu/drm/bridge/panel.c +++ b/drivers/gpu/drm/bridge/panel.c @@ -499,4 +499,38 @@ struct drm_bridge *drmm_of_get_bridge(struct drm_device *drm, } EXPORT_SYMBOL(drmm_of_get_bridge); +/** + * devm_drm_of_dsi_get_bridge - Return next DSI 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 + * + * Lookup a given child DSI node or a DT node's port and endpoint number, + * find the connected node and return either the associated struct drm_panel + * or drm_bridge device. Either @panel or @bridge must not be NULL. + * + * Returns a pointer to the bridge if successful, or an error pointer + * otherwise. + */ +struct drm_bridge *devm_drm_of_dsi_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_dsi_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_dsi_get_bridge); + #endif diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 42f86327b40a..ccb14e361d3f 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -931,6 +931,8 @@ struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, struct device_node u32 port, u32 endpoint); struct drm_bridge *drmm_of_get_bridge(struct drm_device *drm, struct device_node *node, u32 port, u32 endpoint); +struct drm_bridge *devm_drm_of_dsi_get_bridge(struct device *dev, struct device_node *node, + u32 port, u32 endpoint); #else static inline struct drm_bridge *devm_drm_of_get_bridge(struct device *dev, struct device_node *node,
Add devm OF helper to return the next DSI bridge in the chain. Unlike general bridge return helper devm_drm_of_get_bridge, this helper uses the dsi specific panel_or_bridge helper to find the next DSI device in the pipeline. Helper lookup a given child DSI node or a DT node's port and endpoint number, find the connected node and return either the associated struct drm_panel or drm_bridge device. Cc: Maxime Ripard <mripard@kernel.org> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> --- Changes for v12, v11: - none Changes for v10: - new patch drivers/gpu/drm/bridge/panel.c | 34 ++++++++++++++++++++++++++++++++++ include/drm/drm_bridge.h | 2 ++ 2 files changed, 36 insertions(+)