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The bridge's own link state goes down on removal, but nothing tells it to retrain when the cable comes back unless something above it issues a fresh atomic commit -- which these applications never do. Patch 1 (improve HPD interrupt handling) fixes the interrupt handler to clear all three IRQ status registers instead of just one, so the IRQ pin is fully de-asserted and doesn't stay stuck; adds detection of the bridge's separate replug event (a short unplug/replug that doesn't always cross the debounce threshold used for insertion/removal); and switches from polling every connector on the device to notifying only the DP connector that actually had the event. Patch 2 (retrain DP link directly on cable replug) adds a work handler that retrains the DP link and re-enables the video stream directly from the HPD interrupt path when the pipeline is still active, without waiting for a new atomic commit. This is the piece that actually fixes the recovery problem described above -- applications with no hotplug handling get their display back without doing anything. Yashas D (2): drm/bridge: ti-sn65dsi86: improve HPD interrupt handling drm/bridge: ti-sn65dsi86: retrain DP link directly on cable replug drivers/gpu/drm/bridge/ti-sn65dsi86.c | 227 ++++++++++++++++++++++---- 1 file changed, 193 insertions(+), 34 deletions(-) -- 2.34.1