[PATCH v6 2/7] drm/bridge/synopsys: dsi: don't call __dw_mipi_dsi_probe from dw_mipi_dsi_bind

[Heiko Stuebner]

__dw_mipi_dsi_probe() does all the grabbing of resources and does it using
devm-helpers. So this is happening on each try of master bringup possibly
slowing down things a lot.

Drivers using the component framework may instead want to call
dw_mipi_dsi_probe separately in their probe function to setup resources
early. That way the dsi bus also gets created earlier and also not
recreated on each bind-try, so that attached panels can load their modules
and be probed way before the bridge-attach in the bind call.

So drop the call to __dw_mipi_dsi_probe and modify the function to take
a struct dw_mipi_dsi instead of the platform-device.

Signed-off-by: Heiko Stuebner <he...@sntech.de>
Reviewed-by: Andrzej Hajda <a.ha...@samsung.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 15 +++------------
 include/drm/bridge/dw_mipi_dsi.h              |  5 +----
 2 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c 
b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 07cde255cab2..bb4aeca5c0f9 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -966,31 +966,22 @@ EXPORT_SYMBOL_GPL(dw_mipi_dsi_remove);
 /*
  * Bind/unbind API, used from platforms based on the component framework.
  */
-struct dw_mipi_dsi *
-dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-                const struct dw_mipi_dsi_plat_data *plat_data)
+int dw_mipi_dsi_bind(struct dw_mipi_dsi *dsi, struct drm_encoder *encoder)
 {
-       struct dw_mipi_dsi *dsi;
        int ret;
 
-       dsi = __dw_mipi_dsi_probe(pdev, plat_data);
-       if (IS_ERR(dsi))
-               return dsi;
-
        ret = drm_bridge_attach(encoder, &dsi->bridge, NULL);
        if (ret) {
-               dw_mipi_dsi_remove(dsi);
                DRM_ERROR("Failed to initialize bridge with drm\n");
-               return ERR_PTR(ret);
+               return ret;
        }
 
-       return dsi;
+       return ret;
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind);
 
 void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi)
 {
-       __dw_mipi_dsi_remove(dsi);
 }
 EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind);
 
diff --git a/include/drm/bridge/dw_mipi_dsi.h b/include/drm/bridge/dw_mipi_dsi.h
index d9c6d549f971..6d7f8eb5d9f2 100644
--- a/include/drm/bridge/dw_mipi_dsi.h
+++ b/include/drm/bridge/dw_mipi_dsi.h
@@ -35,10 +35,7 @@ struct dw_mipi_dsi *dw_mipi_dsi_probe(struct platform_device 
*pdev,
                                      const struct dw_mipi_dsi_plat_data
                                      *plat_data);
 void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi);
-struct dw_mipi_dsi *dw_mipi_dsi_bind(struct platform_device *pdev,
-                                    struct drm_encoder *encoder,
-                                    const struct dw_mipi_dsi_plat_data
-                                    *plat_data);
+int dw_mipi_dsi_bind(struct dw_mipi_dsi *dsi, struct drm_encoder *encoder);
 void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi);
 
 #endif /* __DW_MIPI_DSI__ */
-- 
2.18.0

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel