[Intel-gfx] [RFC 10/14] drm/i915: Enable Tearing effect trigger by GPIO pin

[Gaurav K Singh]

While enabling MIPI Port in command mode, enable tearing effect
by GPIO pin.

Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
Signed-off-by: Yogesh Mohan Marimuthu <yogesh.mohan.marimuthu at intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>
---
 drivers/gpu/drm/i915/intel_dsi.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index f2fb3fc..484ed38 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -352,7 +352,11 @@ static void intel_dsi_port_enable(struct intel_encoder *encoder)
 					LANE_CONFIGURATION_DUAL_LINK_A;
 		}
 		/* assert ip_tg_enable signal */
-		I915_WRITE(MIPI_PORT_CTRL(port), temp | DPI_ENABLE);
+		if (is_cmd_mode(intel_dsi))
+			I915_WRITE(MIPI_PORT_CTRL(port),
+				   temp | TEARING_EFFECT_GPIO);
+		else
+			I915_WRITE(MIPI_PORT_CTRL(port), temp | DPI_ENABLE);
 		POSTING_READ(MIPI_PORT_CTRL(port));
 	}
 }
-- 
1.7.9.5