drm/i915/icl: Get DSI transcoder for a given port

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.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/f88ff26fa10c68e37b7838bb7c8573c881474e73.1539613303.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index f9df3a7..407c306 100644 (file)
--- 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 9fac67e..5408713 100644 (file)
--- 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
 };