drm/i915: Consistently use enum pipe for PCH transcoders

commit a2196033 upstream.

The current code uses in some instances enum transcoder for PCH
transcoders and enum pipe in others. This is error prone and clang
raises warnings like this:

drivers/gpu/drm/i915/intel_dp.c:3546:51: warning: implicit conversion
  from enumeration type 'enum pipe' to different enumeration type
  'enum transcoder' [-Wenum-conversion]
    intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);

Consistently use the type enum pipe for PCH transcoders.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20170717181403.57324-1-mka@chromium.org
[nc: Backport to 4.9; adjust context and drop unneeded hunks]
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/gpu/drm/i915/i915_irq.c

@@ -1985,10 +1985,10 @@ static void ibx_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
 		DRM_DEBUG_DRIVER("PCH transcoder CRC error interrupt\n");
 
 	if (pch_iir & SDE_TRANSA_FIFO_UNDER)
-		intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
+		intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_A);
 
 	if (pch_iir & SDE_TRANSB_FIFO_UNDER)
-		intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
+		intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_B);
 }
 
 static void ivb_err_int_handler(struct drm_i915_private *dev_priv)
@@ -2022,13 +2022,13 @@ static void cpt_serr_int_handler(struct drm_i915_private *dev_priv)
 		DRM_ERROR("PCH poison interrupt\n");
 
 	if (serr_int & SERR_INT_TRANS_A_FIFO_UNDERRUN)
-		intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_A);
+		intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_A);
 
 	if (serr_int & SERR_INT_TRANS_B_FIFO_UNDERRUN)
-		intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_B);
+		intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_B);
 
 	if (serr_int & SERR_INT_TRANS_C_FIFO_UNDERRUN)
-		intel_pch_fifo_underrun_irq_handler(dev_priv, TRANSCODER_C);
+		intel_pch_fifo_underrun_irq_handler(dev_priv, PIPE_C);
 
 	I915_WRITE(SERR_INT, serr_int);
 }

drivers/gpu/drm/i915/intel_display.c

@@ -1849,7 +1849,7 @@ static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
 
 	/* FDI must be feeding us bits for PCH ports */
 	assert_fdi_tx_enabled(dev_priv, (enum pipe) cpu_transcoder);
-	assert_fdi_rx_enabled(dev_priv, TRANSCODER_A);
+	assert_fdi_rx_enabled(dev_priv, PIPE_A);
 
 	/* Workaround: set timing override bit. */
 	val = I915_READ(TRANS_CHICKEN2(PIPE_A));
@@ -1950,7 +1950,7 @@ static void intel_enable_pipe(struct intel_crtc *crtc)
 	assert_sprites_disabled(dev_priv, pipe);
 
 	if (HAS_PCH_LPT(dev_priv))
-		pch_transcoder = TRANSCODER_A;
+		pch_transcoder = PIPE_A;
 	else
 		pch_transcoder = pipe;
 
@@ -4636,7 +4636,7 @@ static void lpt_pch_enable(struct drm_crtc *crtc)
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
 
-	assert_pch_transcoder_disabled(dev_priv, TRANSCODER_A);
+	assert_pch_transcoder_disabled(dev_priv, PIPE_A);
 
 	lpt_program_iclkip(crtc);
 
@@ -5410,7 +5410,7 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config,
 		return;
 
 	if (intel_crtc->config->has_pch_encoder)
-		intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
+		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A,
 						      false);
 
 	intel_encoders_pre_pll_enable(crtc, pipe_config, old_state);
@@ -5498,7 +5498,7 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config,
 		intel_wait_for_vblank(dev, pipe);
 		intel_wait_for_vblank(dev, pipe);
 		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
-		intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
+		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A,
 						      true);
 	}
 
@@ -5597,7 +5597,7 @@ static void haswell_crtc_disable(struct intel_crtc_state *old_crtc_state,
 	enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder;
 
 	if (intel_crtc->config->has_pch_encoder)
-		intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
+		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A,
 						      false);
 
 	intel_encoders_disable(crtc, old_crtc_state, old_state);
@@ -5626,7 +5626,7 @@ static void haswell_crtc_disable(struct intel_crtc_state *old_crtc_state,
 	intel_encoders_post_disable(crtc, old_crtc_state, old_state);
 
 	if (old_crtc_state->has_pch_encoder)
-		intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
+		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A,
 						      true);
 }
 

drivers/gpu/drm/i915/intel_drv.h

@@ -1095,12 +1095,12 @@ static inline unsigned int intel_num_planes(struct intel_crtc *crtc)
 bool intel_set_cpu_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
 					   enum pipe pipe, bool enable);
 bool intel_set_pch_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
-					   enum transcoder pch_transcoder,
+					   enum pipe pch_transcoder,
 					   bool enable);
 void intel_cpu_fifo_underrun_irq_handler(struct drm_i915_private *dev_priv,
 					 enum pipe pipe);
 void intel_pch_fifo_underrun_irq_handler(struct drm_i915_private *dev_priv,
-					 enum transcoder pch_transcoder);
+					 enum pipe pch_transcoder);
 void intel_check_cpu_fifo_underruns(struct drm_i915_private *dev_priv);
 void intel_check_pch_fifo_underruns(struct drm_i915_private *dev_priv);
 

drivers/gpu/drm/i915/intel_fifo_underrun.c

@@ -311,7 +311,7 @@ bool intel_set_cpu_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
  * Returns the previous state of underrun reporting.
  */
 bool intel_set_pch_fifo_underrun_reporting(struct drm_i915_private *dev_priv,
-					   enum transcoder pch_transcoder,
+					   enum pipe pch_transcoder,
 					   bool enable)
 {
 	struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pch_transcoder];
@@ -384,7 +384,7 @@ void intel_cpu_fifo_underrun_irq_handler(struct drm_i915_private *dev_priv,
  * interrupt to avoid an irq storm.
  */
 void intel_pch_fifo_underrun_irq_handler(struct drm_i915_private *dev_priv,
-					 enum transcoder pch_transcoder)
+					 enum pipe pch_transcoder)
 {
 	if (intel_set_pch_fifo_underrun_reporting(dev_priv, pch_transcoder,
 						  false))