| Message ID | 20211207215753.635841-1-robdclark@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v3] drm/bridge: sn65dsi86: defer if there is no dsi host | expand |
Quoting Rob Clark (2021-12-07 13:57:52) > 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> > --- Reviewed-by: Stephen Boyd <swboyd@chromium.org> One more nit below > 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 > @@ -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; This can be simplified further to return devm_mipi_dsi_attach(dev, dsi);
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;