> On Tue, Jul 07, 2026 at 04:57:04PM +0800, LIOU, Mei Fan wrote: > > When eDP connector is forced off (video=eDP-1:d), > > intel_edp_init_connector() ignores the force flag and still probes the > > AUX channel for DPCD and EDID. > > > > video=eDP-1:d sets connector->force = DRM_FORCE_OFF via > > drm_connector_get_cmdline_mode() inside drm_connector_init_with_ddc(), > > which logs 'forcing eDP-1 connector off'. However, > > intel_edp_init_connector() is called immediately after and ignores the > > force flag, so AUX/PPS probing still occurs. > > > > Fix this by checking connector->base.force == DRM_FORCE_OFF in > > intel_edp_init_connector() after the intel_dp_is_edp() check, before > > any AUX/DPCD probing is attempted. When the connector is forced off, > > log an informational message and goto out_vdd_off to properly clean up > > PPS state and skip all remaining hardware probing. > > > > Suggested-by: Arun R Murthy <[email protected]> > > Signed-off-by: LIOU, Mei Fan <[email protected]> > > --- > > drivers/gpu/drm/i915/display/intel_dp.c | 11 +++++++++++ > > 1 file changed, 11 insertions(+) > > > > diff --git a/drivers/gpu/drm/i915/display/intel_dp.c > > b/drivers/gpu/drm/i915/display/intel_dp.c > > index 3569e61e7fee..fa61b299f83e 100644 > > --- a/drivers/gpu/drm/i915/display/intel_dp.c > > +++ b/drivers/gpu/drm/i915/display/intel_dp.c > > @@ -7057,6 +7057,17 @@ static bool intel_edp_init_connector(struct > > intel_dp *intel_dp, > > > > intel_alpm_init(intel_dp); > > > > + /* > > + * If the connector has been forced off via the kernel cmdline > > + * (e.g. video=eDP-1:d), skip DPCD/AUX probing. > > + */ > > + if (connector->base.force == DRM_FORCE_OFF) { > > + drm_info(display->drm, > > + "[ENCODER:%d:%s] eDP disabled via cmdline, skipping > eDP init\n", > > + encoder->base.base.id, encoder->base.name); > > + goto out_vdd_off; > > + } > > This doesn't looks sane if the eDP panel is actually there. We need to turn > it off > gracefully. > eDP panel is not connected. Hence adding the parameter video=edp-1:d should bypass the edp probe. But even with adding this parameter edp is being probed and failure/error messages are being cascaded in dmesg. Eventually trying to fix the parameter video=edp-1:d !
Thanks and Regards, Arun R Murthy ------------------- > > + > > /* Cache DPCD and EDID for edp. */ > > has_dpcd = intel_edp_init_dpcd(intel_dp, connector); > > > > -- > > 2.52.0 > > -- > Ville Syrjälä > Intel
