[PATCH v4 6/8] drm/msm: dp: handle the IRQ_HPD events reported by USB-C
Dmitry Baryshkov <[email protected]>
| Newsgroups | org.infradead.lists.linux-amlogic,org.freedesktop.lists.dri-devel,org.freedesktop.lists.intel-gfx,org.freedesktop.lists.intel-xe,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-arm-msm,org.kernel.vger.linux-kernel,org.kernel.vger.linux-usb |
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The DisplayPort standard defines a special kind of HPD events called IRQ_HPD. These events are used to notify DP Source about the events on the Sink side, for example DP MST events. Let the MSM DisplayPort driver properly track and handle IRQ_HPD delivered over the OOB events (e.g. from the USB-C AltMode handler). Signed-off-by: Dmitry Baryshkov <[email protected]> --- drivers/gpu/drm/msm/dp/dp_display.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index c0f6a8ff9b99..743d8fa40dc6 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1533,11 +1533,12 @@ void msm_dp_bridge_hpd_notify(struct drm_bridge *bridge, msm_dp_display->connector_type, hpd_link_status, status); if (status == connector_status_connected) { - if (hpd_link_status == ISR_HPD_REPLUG_COUNT) { + if (hpd_link_status == ISR_IRQ_HPD_PULSE_COUNT || + extra_status == DRM_CONNECTOR_DP_IRQ_HPD) { + msm_dp_irq_hpd_handle(dp); + } else if (hpd_link_status == ISR_HPD_REPLUG_COUNT) { msm_dp_hpd_unplug_handle(dp); msm_dp_hpd_plug_handle(dp); - } else if (hpd_link_status == ISR_IRQ_HPD_PULSE_COUNT) { - msm_dp_irq_hpd_handle(dp); } else { msm_dp_hpd_plug_handle(dp); } -- 2.47.3 _______________________________________________ linux-amlogic mailing list [email protected] http://lists.infradead.org/mailman/listinfo/linux-amlogic