On Thu, Mar 31, 2022 at 09:15:03PM +0530, Jagan Teki wrote: > devm_drm_of_get_bridge is capable of looking up the downstream > bridge and panel and trying to add a panel bridge if the panel > is found. > > Replace explicit finding calls with devm_drm_of_get_bridge. > > Cc: Linus Walleij <[email protected]> > Signed-off-by: Jagan Teki <[email protected]> > Reviewed-by: Linus Walleij <[email protected]> > --- > Changes for v4: > - collect r-b > Changes for v3: > - fix commit head > - drop panel.h > - use drm_bridge_remove > Changes for v2: > - split the patch > > drivers/gpu/drm/mcde/mcde_dsi.c | 44 +++++---------------------------- > 1 file changed, 6 insertions(+), 38 deletions(-) > > diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c > index 5651734ce977..083a4728654d 100644 > --- a/drivers/gpu/drm/mcde/mcde_dsi.c > +++ b/drivers/gpu/drm/mcde/mcde_dsi.c > @@ -19,7 +19,6 @@ > #include <drm/drm_mipi_dsi.h> > #include <drm/drm_modeset_helper_vtables.h> > #include <drm/drm_of.h> > -#include <drm/drm_panel.h> > #include <drm/drm_print.h> > #include <drm/drm_probe_helper.h> > > @@ -39,7 +38,6 @@ struct mcde_dsi { > struct device *dev; > struct mcde *mcde; > struct drm_bridge bridge; > - struct drm_panel *panel; > struct drm_bridge *bridge_out; > struct mipi_dsi_host dsi_host; > struct mipi_dsi_device *mdsi; > @@ -1073,9 +1071,7 @@ static int mcde_dsi_bind(struct device *dev, struct > device *master, > struct drm_device *drm = data; > struct mcde *mcde = to_mcde(drm); > struct mcde_dsi *d = dev_get_drvdata(dev); > - struct device_node *child; > - struct drm_panel *panel = NULL; > - struct drm_bridge *bridge = NULL; > + struct drm_bridge *bridge; > > if (!of_get_available_child_count(dev->of_node)) { > dev_info(dev, "unused DSI interface\n"); > @@ -1100,37 +1096,10 @@ static int mcde_dsi_bind(struct device *dev, struct > device *master, > return PTR_ERR(d->lp_clk); > } > > - /* Look for a panel as a child to this node */ > - for_each_available_child_of_node(dev->of_node, child) { > - panel = of_drm_find_panel(child); > - if (IS_ERR(panel)) { > - dev_err(dev, "failed to find panel try bridge (%ld)\n", > - PTR_ERR(panel)); > - panel = NULL; > - > - bridge = of_drm_find_bridge(child); > - if (!bridge) { > - dev_err(dev, "failed to find bridge\n"); > - return -EINVAL; > - } > - } > - } > - if (panel) { > - bridge = drm_panel_bridge_add_typed(panel, > - DRM_MODE_CONNECTOR_DSI); > - if (IS_ERR(bridge)) { > - dev_err(dev, "error adding panel bridge\n"); > - return PTR_ERR(bridge); > - } > - dev_info(dev, "connected to panel\n"); > - d->panel = panel; > - } else if (bridge) { > - /* TODO: AV8100 HDMI encoder goes here for example */ > - dev_info(dev, "connected to non-panel bridge (unsupported)\n"); > - return -ENODEV; > - } else { > - dev_err(dev, "no panel or bridge\n"); > - return -ENODEV; > + bridge = devm_drm_of_get_bridge(dev, dev->of_node, 0, 0); > + if (IS_ERR(bridge)) { > + dev_err(dev, "error to get bridge\n"); > + return PTR_ERR(bridge); > } > > d->bridge_out = bridge; > @@ -1153,8 +1122,7 @@ static void mcde_dsi_unbind(struct device *dev, struct > device *master, > { > struct mcde_dsi *d = dev_get_drvdata(dev); > > - if (d->panel) > - drm_panel_bridge_remove(d->bridge_out); > + drm_bridge_remove(d->bridge_out);
You don't need drm_bridge_remove if you used devm_drm_of_get_bridge Maxime
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