drm/i915/dsi: move wait_for_dsi_fifo_empty to intel_dsi.c

wait_for_dsi_fifo_empty can be static in intel_dsi.c. No functional
changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-By: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index dac41046a0cc..94865eb22c93 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -42,6 +42,22 @@ static const struct intel_dsi_device intel_dsi_devices[] = {
         },
 };
 
+static void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi)
+{
+        struct drm_encoder *encoder = &intel_dsi->base.base;
+        struct drm_device *dev = encoder->dev;
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
+        enum port port = intel_dsi_pipe_to_port(intel_crtc->pipe);
+        u32 mask;
+
+        mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
+                LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
+
+        if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & mask) == mask, 100))
+                DRM_ERROR("DPI FIFOs are not empty\n");
+}
+
 static void band_gap_reset(struct drm_i915_private *dev_priv)
 {
         mutex_lock(&dev_priv->dpio_lock);