On Wed, Oct 16, 2024 at 04:23:59PM +0300, Imre Deak wrote:
> The sink's capabilities, like the DSC caps, depend on the source OUI
> written to the sink's DPCD registers and so this OUI value should be
> valid for the whole duration of the detection. An eDP sink will reset
> this OUI value when the panel power is disabled, so prevent the
> disabling - happening by default after a 1 sec idle period - for the
> whole duration of detection.
>
> Signed-off-by: Imre Deak <imre.d...@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_dp.c | 18 +++++++++++++-----
> drivers/gpu/drm/i915/display/intel_pps.c | 11 +++++++++++
> drivers/gpu/drm/i915/display/intel_pps.h | 1 +
> 3 files changed, 25 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index 977ff2ce18eeb..3da06d25bc4ef 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -5616,6 +5616,8 @@ intel_dp_detect(struct drm_connector *connector,
>
> intel_dp_flush_connector_commits(intel_connector);
>
> + intel_pps_vdd_on(intel_dp);
> +
> /* Can't disconnect eDP */
> if (intel_dp_is_edp(intel_dp))
> status = edp_detect(intel_dp);
> @@ -5646,12 +5648,15 @@ intel_dp_detect(struct drm_connector *connector,
>
> intel_dp_tunnel_disconnect(intel_dp);
>
> - goto out;
> + goto out_unset_edid;
> }
>
> ret = intel_dp_tunnel_detect(intel_dp, ctx);
> - if (ret == -EDEADLK)
> - return ret;
> + if (ret == -EDEADLK) {
> + status = ret;
> +
> + goto out_vdd_off;
> + }
>
> if (ret == 1)
> intel_connector->base.epoch_counter++;
> @@ -5679,7 +5684,7 @@ intel_dp_detect(struct drm_connector *connector,
> * with EDID on it
> */
> status = connector_status_disconnected;
> - goto out;
> + goto out_unset_edid;
> }
>
> /*
> @@ -5708,7 +5713,7 @@ intel_dp_detect(struct drm_connector *connector,
>
> intel_dp_check_device_service_irq(intel_dp);
>
> -out:
> +out_unset_edid:
> if (status != connector_status_connected && !intel_dp->is_mst)
> intel_dp_unset_edid(intel_dp);
>
> @@ -5717,6 +5722,9 @@ intel_dp_detect(struct drm_connector *connector,
> status,
> intel_dp->dpcd,
> intel_dp->downstream_ports);
> +out_vdd_off:
> + intel_pps_vdd_off(intel_dp);
> +
> return status;
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_pps.c
> b/drivers/gpu/drm/i915/display/intel_pps.c
> index ffeee9daa5689..64f1f7ea94993 100644
> --- a/drivers/gpu/drm/i915/display/intel_pps.c
> +++ b/drivers/gpu/drm/i915/display/intel_pps.c
> @@ -950,6 +950,17 @@ void intel_pps_vdd_off_unlocked(struct intel_dp
> *intel_dp, bool sync)
> edp_panel_vdd_schedule_off(intel_dp);
> }
>
> +void intel_pps_vdd_off(struct intel_dp *intel_dp)
> +{
> + intel_wakeref_t wakeref;
> +
> + if (!intel_dp_is_edp(intel_dp))
> + return;
> +
> + with_intel_pps_lock(intel_dp, wakeref)
> + intel_pps_vdd_off_unlocked(intel_dp, false);
> +}
> +
> void intel_pps_on_unlocked(struct intel_dp *intel_dp)
> {
> struct intel_display *display = to_intel_display(intel_dp);
> diff --git a/drivers/gpu/drm/i915/display/intel_pps.h
> b/drivers/gpu/drm/i915/display/intel_pps.h
> index bc5046d536264..c83007152f07d 100644
> --- a/drivers/gpu/drm/i915/display/intel_pps.h
> +++ b/drivers/gpu/drm/i915/display/intel_pps.h
> @@ -34,6 +34,7 @@ void intel_pps_off_unlocked(struct intel_dp *intel_dp);
> void intel_pps_check_power_unlocked(struct intel_dp *intel_dp);
>
> void intel_pps_vdd_on(struct intel_dp *intel_dp);
> +void intel_pps_vdd_off(struct intel_dp *intel_dp);
> void intel_pps_on(struct intel_dp *intel_dp);
> void intel_pps_off(struct intel_dp *intel_dp);
> void intel_pps_vdd_off_sync(struct intel_dp *intel_dp);
> --
> 2.44.2
--
Ville Syrjälä
Intel
