From: Madhav Chauhan <madhav.chau...@intel.com>

This patch adds a helper function to retrieve DSI
transcoder for a given DSI port using newly defined
enum names for DSI transcoders.

Signed-off-by: Madhav Chauhan <madhav.chau...@intel.com>
Reviewed-by: Jani Nikula <jani.nik...@intel.com>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
 drivers/gpu/drm/i915/icl_dsi.c       | 8 ++++++++
 drivers/gpu/drm/i915/intel_display.h | 6 ++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index f9df3a7fa66b..407c3065d08d 100644
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -27,6 +27,14 @@
 
 #include "intel_dsi.h"
 
+static enum transcoder __attribute__((unused)) dsi_port_to_transcoder(enum 
port port)
+{
+       if (port == PORT_A)
+               return TRANSCODER_DSI_0;
+       else
+               return TRANSCODER_DSI_1;
+}
+
 static void dsi_program_swing_and_deemphasis(struct intel_encoder *encoder)
 {
        struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
diff --git a/drivers/gpu/drm/i915/intel_display.h 
b/drivers/gpu/drm/i915/intel_display.h
index 9fac67e31205..54087130f67e 100644
--- a/drivers/gpu/drm/i915/intel_display.h
+++ b/drivers/gpu/drm/i915/intel_display.h
@@ -61,8 +61,10 @@ enum transcoder {
        TRANSCODER_B,
        TRANSCODER_C,
        TRANSCODER_EDP,
-       TRANSCODER_DSI_A,
-       TRANSCODER_DSI_C,
+       TRANSCODER_DSI_0,
+       TRANSCODER_DSI_1,
+       TRANSCODER_DSI_A = TRANSCODER_DSI_0,    /* legacy DSI */
+       TRANSCODER_DSI_C = TRANSCODER_DSI_1,    /* legacy DSI */
 
        I915_MAX_TRANSCODERS
 };
-- 
2.11.0

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