diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/805-display-0052-LF-323-1-drm-bridge-cdns-move-link-training-to-bridg.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/805-display-0052-LF-323-1-drm-bridge-cdns-move-link-training-to-bridg.patch | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/805-display-0052-LF-323-1-drm-bridge-cdns-move-link-training-to-bridg.patch b/target/linux/layerscape/patches-5.4/805-display-0052-LF-323-1-drm-bridge-cdns-move-link-training-to-bridg.patch new file mode 100644 index 0000000000..4dcd5c86d6 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/805-display-0052-LF-323-1-drm-bridge-cdns-move-link-training-to-bridg.patch @@ -0,0 +1,74 @@ +From fa76cd6f0ed305fb2870083842b1ff7bcf027655 Mon Sep 17 00:00:00 2001 +From: Sandor Yu <Sandor.yu@nxp.com> +Date: Mon, 9 Dec 2019 17:52:35 +0800 +Subject: [PATCH] LF-323-1: drm/bridge/cdns: move link training to bridge + enable function + +Move link training and video enable functions from mode_set to +bridge_enable. it is more reasonable. +cdns_dp_mode_set don't needed in HPD thread, DP link training will +resetup in bridge_enable when cable connecting. + +Signed-off-by: Sandor Yu <Sandor.yu@nxp.com> +Reviewed-by: Robby Cai <robby.cai@nxp.com> +--- + drivers/gpu/drm/bridge/cadence/cdns-dp-core.c | 34 +++++++++++++-------------- + 1 file changed, 16 insertions(+), 18 deletions(-) + +--- a/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c ++++ b/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c +@@ -178,19 +178,6 @@ static void cdns_dp_mode_set(struct cdns + return; + } + +- /* Link trainning */ +- ret = cdns_mhdp_train_link(mhdp); +- if (ret) { +- DRM_DEV_ERROR(mhdp->dev, "Failed link train %d\n", ret); +- return; +- } +- +- ret = cdns_mhdp_set_video_status(mhdp, CONTROL_VIDEO_VALID); +- if (ret) { +- DRM_DEV_ERROR(mhdp->dev, "Failed to valid video %d\n", ret); +- return; +- } +- + return; + } + +@@ -339,6 +326,21 @@ static void cdns_dp_bridge_mode_set(stru + + static void cdn_hdp_bridge_enable(struct drm_bridge *bridge) + { ++ struct cdns_mhdp_device *mhdp = bridge->driver_private; ++ int ret; ++ ++ /* Link trainning */ ++ ret = cdns_mhdp_train_link(mhdp); ++ if (ret) { ++ DRM_DEV_ERROR(mhdp->dev, "Failed link train %d\n", ret); ++ return; ++ } ++ ++ ret = cdns_mhdp_set_video_status(mhdp, CONTROL_VIDEO_VALID); ++ if (ret) { ++ DRM_DEV_ERROR(mhdp->dev, "Failed to valid video %d\n", ret); ++ return; ++ } + } + + static void cdn_hdp_bridge_disable(struct drm_bridge *bridge) +@@ -366,11 +368,7 @@ static void hotplug_work_func(struct wor + drm_helper_hpd_irq_event(connector->dev); + + if (connector->status == connector_status_connected) { +- /* reset video mode after cable plugin */ +- mutex_lock(&mhdp->lock); +- cdns_dp_mode_set(mhdp); +- mutex_unlock(&mhdp->lock); +- ++ /* Cable connedted */ + DRM_INFO("HDMI/DP Cable Plug In\n"); + enable_irq(mhdp->irq[IRQ_OUT]); + } else if (connector->status == connector_status_disconnected) { |