drm/i915/icl: Don't wait for empty FIFO

For Gen11 DSI, we don't need to wait for getting
DSI FIFO empty after sending DCS commands.

Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/5e078a0274c1fba2521cb14d7d02fd1038ec1b0e.1540900289.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/intel_dsi_vbt.c b/drivers/gpu/drm/i915/intel_dsi_vbt.c
index 80bd56e96143f0e92c415ce7acf85e1e5dec65ed..a72de81f4832381e21900f72fdbbc3e116c75bae 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_vbt.c
@@ -111,6 +111,7 @@ static inline enum port intel_dsi_seq_port_to_port(u8 port)
 static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi,
                                       const u8 *data)
 {
+       struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
        struct mipi_dsi_device *dsi_device;
        u8 type, flags, seq_port;
        u16 len;
@@ -181,7 +182,8 @@ static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi,
                break;
        }
 
-       vlv_dsi_wait_for_fifo_empty(intel_dsi, port);
+       if (!IS_ICELAKE(dev_priv))
+               vlv_dsi_wait_for_fifo_empty(intel_dsi, port);
 
 out:
        data += len;