[PATCH] drm/i915: Refine eDP aux backlight enable/disable sequence

Lee Shawn C
2019-06-21T02:56:49Z

Modify aux backlight enable/disable sequence just like what we
did for genernal eDP panel.
1. Setup PWM freq and brightness level before enable display backlight.
2. Set PWM to 0 after backlight enable was off.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Jose Roberto de Souza <jose.souza@intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>

Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
---
drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
index 6b0b73479fb8..bbc579734238 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -216,13 +216,14 @@ static void intel_dp_aux_enable_backlight(const struct intel_crtc_state *crtc_st
}
}

- set_aux_backlight_enable(intel_dp, true);
intel_dp_aux_set_backlight(conn_state, connector->panel.backlight.level);
+ set_aux_backlight_enable(intel_dp, true);
}

static void intel_dp_aux_disable_backlight(const struct drm_connector_state *old_conn_state)
{
set_aux_backlight_enable(enc_to_intel_dp(old_conn_state->best_encoder), false);
+ intel_dp_aux_set_backlight(old_conn_state, 0);
}

static int intel_dp_aux_setup_backlight(struct intel_connector *connector,
--
2.7.4