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drm/i915: Wait for LVDS panel power cycle delay on reboot

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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 <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201001151640.14590-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä 2020-10-01 18:16:39 +03:00
parent e219ef912a
commit d2008827d3
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/i915/display/intel_lvds.c
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@ -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);