[Intel-gfx] [PATCH v8 11/38] drm/i915/icl: Disable DDI function

[Jani Nikula]

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

This patch disables DDI function by writing to
TRANS_DDI_FUNC_CTL registers of DSI ports as part
of DSI disable sequence.

Signed-off-by: Madhav Chauhan <madhav.chauhan at intel.com>
Reviewed-by: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/icl_dsi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index 83c422d5976c..0041f57d3c0b 100644
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -833,6 +833,14 @@ static void gen11_dsi_deconfigure_trancoder(struct intel_encoder *encoder)
 				10))
 			DRM_ERROR("DSI link not in ULPS\n");
 	}
+
+	/* disable ddi function */
+	for_each_dsi_port(port, intel_dsi->ports) {
+		dsi_trans = dsi_port_to_transcoder(port);
+		tmp = I915_READ(TRANS_DDI_FUNC_CTL(dsi_trans));
+		tmp &= ~TRANS_DDI_FUNC_ENABLE;
+		I915_WRITE(TRANS_DDI_FUNC_CTL(dsi_trans), tmp);
+	}
 }
 
 static void __attribute__((unused)) gen11_dsi_disable(
-- 
2.11.0