In order to avoid any probe ordering issue, the best practice is to move the secondary MIPI-DSI device registration and attachment to the MIPI-DSI host at probe time. Let's do this.
Acked-by: Sam Ravnborg sam@ravnborg.org Tested-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/bridge/ti-sn65dsi83.c | 80 +++++++++++++++------------ 1 file changed, 46 insertions(+), 34 deletions(-)
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi83.c b/drivers/gpu/drm/bridge/ti-sn65dsi83.c index 539edd2c19f5..945f08de45f1 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi83.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi83.c @@ -245,40 +245,6 @@ static int sn65dsi83_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { struct sn65dsi83 *ctx = bridge_to_sn65dsi83(bridge); - struct device *dev = ctx->dev; - struct mipi_dsi_device *dsi; - struct mipi_dsi_host *host; - int ret = 0; - - const struct mipi_dsi_device_info info = { - .type = "sn65dsi83", - .channel = 0, - .node = NULL, - }; - - host = of_find_mipi_dsi_host_by_node(ctx->host_node); - if (!host) { - dev_err(dev, "failed to find dsi host\n"); - return -EPROBE_DEFER; - } - - dsi = devm_mipi_dsi_device_register_full(dev, host, &info); - if (IS_ERR(dsi)) { - return dev_err_probe(dev, PTR_ERR(dsi), - "failed to create dsi device\n"); - } - - ctx->dsi = dsi; - - dsi->lanes = ctx->dsi_lanes; - dsi->format = MIPI_DSI_FMT_RGB888; - dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST; - - ret = devm_mipi_dsi_attach(dev, dsi); - if (ret < 0) { - dev_err(dev, "failed to attach dsi to host\n"); - return ret; - }
return drm_bridge_attach(bridge->encoder, ctx->panel_bridge, &ctx->bridge, flags); @@ -636,6 +602,44 @@ static int sn65dsi83_parse_dt(struct sn65dsi83 *ctx, enum sn65dsi83_model model) return 0; }
+static int sn65dsi83_host_attach(struct sn65dsi83 *ctx) +{ + struct device *dev = ctx->dev; + struct mipi_dsi_device *dsi; + struct mipi_dsi_host *host; + const struct mipi_dsi_device_info info = { + .type = "sn65dsi83", + .channel = 0, + .node = NULL, + }; + int ret; + + host = of_find_mipi_dsi_host_by_node(ctx->host_node); + if (!host) { + dev_err(dev, "failed to find dsi host\n"); + return -EPROBE_DEFER; + } + + dsi = devm_mipi_dsi_device_register_full(dev, host, &info); + if (IS_ERR(dsi)) + return dev_err_probe(dev, PTR_ERR(dsi), + "failed to create dsi device\n"); + + ctx->dsi = dsi; + + dsi->lanes = ctx->dsi_lanes; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST; + + ret = devm_mipi_dsi_attach(dev, dsi); + if (ret < 0) { + dev_err(dev, "failed to attach dsi to host: %d\n", ret); + return ret; + } + + return 0; +} + static int sn65dsi83_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -679,7 +683,15 @@ static int sn65dsi83_probe(struct i2c_client *client, ctx->bridge.of_node = dev->of_node; drm_bridge_add(&ctx->bridge);
+ ret = sn65dsi83_host_attach(ctx); + if (ret) + goto err_remove_bridge; + return 0; + +err_remove_bridge: + drm_bridge_remove(&ctx->bridge); + return ret; }
static int sn65dsi83_remove(struct i2c_client *client)