We should set backlight mode register before set register to
enable the backlight.
Signed-off-by: Puthikorn Voravootivat <puthik@xxxxxxxxxxxx>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp_aux_backlight.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
index 5ee1d90a3263..a72893da78d0 100644
--- a/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/intel_dp_aux_backlight.c
@@ -103,8 +103,6 @@ static void intel_dp_aux_enable_backlight(struct intel_connector *connector)
uint8_t dpcd_buf = 0;
uint8_t edp_backlight_mode = 0;
- set_aux_backlight_enable(intel_dp, true);
-
if (drm_dp_dpcd_readb(&intel_dp->aux,
DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &dpcd_buf) != 1) {
DRM_DEBUG_KMS("Failed to read DPCD register 0x%x\n",
@@ -131,6 +129,8 @@ static void intel_dp_aux_enable_backlight(struct intel_connector *connector)
default:
break;
}
+
+ set_aux_backlight_enable(intel_dp, true);
}
static void intel_dp_aux_disable_backlight(struct intel_connector *connector)
--
2.13.0.rc2.291.g57267f2277-goog
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