drm/i915: ELiminate intel_pipe_to_cpu_transcoder() from assert_fdi_tx()

Let's start to eliminate intel_pipe_to_cpu_transcoder() so that
we can get rid of one more crtc->config usage (which we will want
to nuke as well).

In the case of assert_fdi_tx() we know that we're never
dealing with the EDP transcoder so we can simply replace
this with a cast.

v2: Fix poor English in comment

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191112163812.22075-3-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 9c47454..e5f725b 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1146,11 +1146,15 @@ static void assert_fdi_tx(struct drm_i915_private *dev_priv,
                          enum pipe pipe, bool state)
 {
        bool cur_state;
-       enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
-                                                                     pipe);
 
        if (HAS_DDI(dev_priv)) {
-               /* DDI does not have a specific FDI_TX register */
+               /*
+                * DDI does not have a specific FDI_TX register.
+                *
+                * FDI is never fed from EDP transcoder
+                * so pipe->transcoder cast is fine here.
+                */
+               enum transcoder cpu_transcoder = (enum transcoder)pipe;
                u32 val = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
                cur_state = !!(val & TRANS_DDI_FUNC_ENABLE);
        } else {