From: Rob Clark robdclark@chromium.org

Otherwise we don't get another shot at it if the bridge probes before the dsi host is registered. It seems like this is what *most* (but not all) of the other bridges do.

It looks like this was missed in the conversion to attach dsi host at probe time.

Fixes: c3b75d4734cb ("drm/bridge: sn65dsi86: Register and attach our DSI device at probe") Signed-off-by: Rob Clark robdclark@chromium.org Reviewed-by: Doug Anderson dianders@chromium.org --- v2: Drop DRM_ERROR() in favor of drm_err_probe() and shift around the spot where we report the error v3: Add \n and cull error msgs a bit further

drivers/gpu/drm/bridge/ti-sn65dsi86.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 02b490671f8f..c2928a6409b1 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -714,16 +714,12 @@ static int ti_sn_attach_host(struct ti_sn65dsi86 *pdata) };

host = of_find_mipi_dsi_host_by_node(pdata->host_node); - if (!host) { - DRM_ERROR("failed to find dsi host\n"); - return -ENODEV; - } + if (!host) + return -EPROBE_DEFER;

dsi = devm_mipi_dsi_device_register_full(dev, host, &info); - if (IS_ERR(dsi)) { - DRM_ERROR("failed to create dsi device\n"); + if (IS_ERR(dsi)) return PTR_ERR(dsi); - }

/* TODO: setting to 4 MIPI lanes always for now */ dsi->lanes = 4; @@ -740,10 +736,8 @@ static int ti_sn_attach_host(struct ti_sn65dsi86 *pdata) pdata->dsi = dsi;

ret = devm_mipi_dsi_attach(dev, dsi); - if (ret < 0) { - DRM_ERROR("failed to attach dsi to host\n"); + if (ret < 0) return ret; - }

return 0; } @@ -1267,8 +1261,10 @@ static int ti_sn_bridge_probe(struct auxiliary_device *adev, drm_bridge_add(&pdata->bridge);

ret = ti_sn_attach_host(pdata); - if (ret) + if (ret) { + dev_err_probe(pdata->dev, ret, "failed to attach dsi host\n"); goto err_remove_bridge; + }

return 0;