[Intel-gfx] [PATCH v8 35/38] HACK: drm/i915/icl: Configure backlight functions for DSI

[Jani Nikula]

From: Madhav Chauhan <madhav.chauhan at intel.com>

Gen11 DSI doesn't use DCS commands based functionality
for enabling/disabling backlight but uses PWM based
functions similar to eDP.

Note by Jani: This should be decided by VBT, not hard coded. DCS
brightness control is still a thing.

Signed-off-by: Madhav Chauhan <madhav.chauhan at intel.com>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/intel_panel.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index ad88008f8dd0..60ccae68b27a 100644
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1835,7 +1835,8 @@ intel_panel_init_backlight_funcs(struct intel_panel *panel)
 	    intel_dp_aux_init_backlight_funcs(connector) == 0)
 		return;
 
-	if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI &&
+	if (IS_GEN9_LP(dev_priv) &&
+	    connector->base.connector_type == DRM_MODE_CONNECTOR_DSI &&
 	    intel_dsi_dcs_init_backlight_funcs(connector) == 0)
 		return;
 
-- 
2.11.0