From: Ville Syrjälä Date: Thu, 1 Oct 2020 15:16:39 +0000 (+0300) Subject: drm/i915: Wait for LVDS panel power cycle delay on reboot X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d2008827d37a69fb6b21c66ea82999b4c4ab0c7c;p=linux.git drm/i915: Wait for LVDS panel power cycle delay on reboot Just like with eDP let's wait for the power sequencer power cycle delay before we reboot the machine, as otherwise we can't guarantee the panel's minimum power cycle delay will be respected. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20201001151640.14590-5-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/display/intel_lvds.c b/drivers/gpu/drm/i915/display/intel_lvds.c index e65c2de522c3c..c6c7c0b9989b9 100644 --- a/drivers/gpu/drm/i915/display/intel_lvds.c +++ b/drivers/gpu/drm/i915/display/intel_lvds.c @@ -371,6 +371,15 @@ static void pch_post_disable_lvds(struct intel_atomic_state *state, intel_disable_lvds(state, encoder, old_crtc_state, old_conn_state); } +static void intel_lvds_shutdown(struct intel_encoder *encoder) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + + if (intel_de_wait_for_clear(dev_priv, PP_STATUS(0), PP_CYCLE_DELAY_ACTIVE, 5000)) + drm_err(&dev_priv->drm, + "timed out waiting for panel power cycle delay\n"); +} + static enum drm_mode_status intel_lvds_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) @@ -897,6 +906,7 @@ void intel_lvds_init(struct drm_i915_private *dev_priv) intel_encoder->get_hw_state = intel_lvds_get_hw_state; intel_encoder->get_config = intel_lvds_get_config; intel_encoder->update_pipe = intel_panel_update_backlight; + intel_encoder->shutdown = intel_lvds_shutdown; intel_connector->get_hw_state = intel_connector_get_hw_state; intel_connector_attach_encoder(intel_connector, intel_encoder);