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-rw-r--r--drivers/gpu/drm/i915/intel_dsi.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 8f8b952eaa92..215d00429b04 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -177,7 +177,12 @@ static void intel_dsi_device_ready(struct intel_encoder *encoder)
usleep_range(2500, 3000);
val = I915_READ(MIPI_PORT_CTRL(port));
- I915_WRITE(MIPI_PORT_CTRL(port), val | LP_OUTPUT_HOLD);
+
+ /* Enable MIPI PHY transparent latch
+ * Common bit for both MIPI Port A & MIPI Port C
+ * No similar bit in MIPI Port C reg
+ */
+ I915_WRITE(MIPI_PORT_CTRL(PORT_A), val | LP_OUTPUT_HOLD);
usleep_range(1000, 1500);
I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_EXIT);