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drm/bridge: analogix_dp: Add support to get panel from the DP AUX bus

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The main modification is moving the DP AUX initialization from function
analogix_dp_bind() to analogix_dp_probe(). In order to get the EDID of
eDP panel during probing, it is also needed to advance PM operations to
ensure that eDP controller and phy are prepared for AUX transmission.

Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20250310104114.2608063-7-damon.ding@rock-chips.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
This commit is contained in:
Damon Ding 2025-03-10 18:41:07 +08:00 committed by Dmitry Baryshkov
parent fd073dffef
commit e5e9fa9f7a
1 changed files with 11 additions and 9 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

20
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
View file

@ -1646,6 +1646,17 @@ analogix_dp_probe(struct device *dev, struct analogix_dp_plat_data *plat_data)
goto err_disable_clk;
}
dp->aux.name = "DP-AUX";
dp->aux.transfer = analogix_dpaux_transfer;
dp->aux.dev = dp->dev;
drm_dp_aux_init(&dp->aux);
pm_runtime_use_autosuspend(dp->dev);
pm_runtime_set_autosuspend_delay(dp->dev, 100);
ret = devm_pm_runtime_enable(dp->dev);
if (ret)
goto err_disable_clk;
return dp;
err_disable_clk:
@ -1696,15 +1707,6 @@ int analogix_dp_bind(struct analogix_dp_device *dp, struct drm_device *drm_dev)
dp->drm_dev = drm_dev;
dp->encoder = dp->plat_data->encoder;
pm_runtime_use_autosuspend(dp->dev);
pm_runtime_set_autosuspend_delay(dp->dev, 100);
ret = devm_pm_runtime_enable(dp->dev);
if (ret)
return ret;
dp->aux.name = "DP-AUX";
dp->aux.transfer = analogix_dpaux_transfer;
dp->aux.dev = dp->dev;
dp->aux.drm_dev = drm_dev;
ret = drm_dp_aux_register(&dp->aux);