Follow generla eDP backlight enable control sequence. Add T8 (valid video
data to backlight enable) delay before turn backlight_enable on.
And T9 (backlight disable to end of valida video data) delay after
backlight_enable off.
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Jose Roberto de Souza <jose.souza@xxxxxxxxx>
Cc: Cooper Chiou <cooper.chiou@xxxxxxxxx>
Signed-off-by: Lee, Shawn C <shawn.c.lee@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
index 98210ae17285..b008e887f4e9 100644
--- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
@@ -217,12 +217,25 @@ static void intel_dp_aux_enable_backlight(const struct intel_crtc_state *crtc_st
}
intel_dp_aux_set_backlight(conn_state, connector->panel.backlight.level);
+
+ wait_remaining_ms_from_jiffies(intel_dp->last_power_on,
+ intel_dp->backlight_on_delay);
+
set_aux_backlight_enable(intel_dp, true);
}
static void intel_dp_aux_disable_backlight(const struct drm_connector_state *old_conn_state)
{
+ struct intel_connector *connector = to_intel_connector(old_conn_state->connector);
+ struct intel_dp *intel_dp = enc_to_intel_dp(&connector->encoder->base);
+
+ intel_dp->last_backlight_off = jiffies;
+
set_aux_backlight_enable(enc_to_intel_dp(old_conn_state->best_encoder), false);
+
+ wait_remaining_ms_from_jiffies(intel_dp->last_backlight_off,
+ intel_dp->backlight_off_delay);
+
intel_dp_aux_set_backlight(old_conn_state, 0);
}
--
2.7.4
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