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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-11-07 03:43:33 +0300 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-12-14 10:27:46 +0300 |
| commit | d4ca26ac4be0d9aea7005c40df75e6775749671b (patch) | |
| tree | b18c7e7170a7e0ca949b9985613c90c6bcdb1300 /drivers/gpu/drm/msm/dp | |
| parent | 3313c23f3eab698bc6b904520ee608fc0f7b03d0 (diff) | |
| download | linux-d4ca26ac4be0d9aea7005c40df75e6775749671b.tar.xz | |
drm/msm/dp: call dp_display_get_next_bridge() during probe
The funcion dp_display_get_next_bridge() can return -EPROBE_DEFER if the
next bridge is not (yet) available. However returning -EPROBE_DEFER from
msm_dp_modeset_init() is not ideal. This leads to -EPROBE return from
component_bind, which can easily result in -EPROBE_DEFR loops.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Konrad Dybcio <konrad.dybcio@linaro.org> # sc8180x-primus
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/566208/
Link: https://lore.kernel.org/r/20231107004424.2112698-1-dmitry.baryshkov@linaro.org
Diffstat (limited to 'drivers/gpu/drm/msm/dp')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_display.c | 36 |
1 files changed, 21 insertions, 15 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 0405ff08d762..d37d599aec27 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1210,15 +1210,27 @@ static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pde return NULL; } -static int dp_auxbus_done_probe(struct drm_dp_aux *aux) +static int dp_display_get_next_bridge(struct msm_dp *dp); + +static int dp_display_probe_tail(struct device *dev) { - int rc; + struct msm_dp *dp = dev_get_drvdata(dev); + int ret; - rc = component_add(aux->dev, &dp_display_comp_ops); - if (rc) - DRM_ERROR("eDP component add failed, rc=%d\n", rc); + ret = dp_display_get_next_bridge(dp); + if (ret) + return ret; - return rc; + ret = component_add(dev, &dp_display_comp_ops); + if (ret) + DRM_ERROR("component add failed, rc=%d\n", ret); + + return ret; +} + +static int dp_auxbus_done_probe(struct drm_dp_aux *aux) +{ + return dp_display_probe_tail(aux->dev); } static int dp_display_probe(struct platform_device *pdev) @@ -1293,11 +1305,9 @@ static int dp_display_probe(struct platform_device *pdev) goto err; } } else { - rc = component_add(&pdev->dev, &dp_display_comp_ops); - if (rc) { - DRM_ERROR("component add failed, rc=%d\n", rc); + rc = dp_display_probe_tail(&pdev->dev); + if (rc) goto err; - } } return rc; @@ -1428,7 +1438,7 @@ static int dp_display_get_next_bridge(struct msm_dp *dp) * For DisplayPort interfaces external bridges are optional, so * silently ignore an error if one is not present (-ENODEV). */ - rc = devm_dp_parser_find_next_bridge(dp->drm_dev->dev, dp_priv->parser); + rc = devm_dp_parser_find_next_bridge(&dp->pdev->dev, dp_priv->parser); if (!dp->is_edp && rc == -ENODEV) return 0; @@ -1448,10 +1458,6 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev, dp_priv = container_of(dp_display, struct dp_display_private, dp_display); - ret = dp_display_get_next_bridge(dp_display); - if (ret) - return ret; - ret = dp_bridge_init(dp_display, dev, encoder); if (ret) { DRM_DEV_ERROR(dev->dev, |