[PATCH] drm/i915: Consistently use enum pipe for PCH transcoders

[Matthias Kaehlcke]

The current code uses two different enum types for PCH transcoders and
performs implicit conversions between the two types. This is error prone
and causes clang to raise 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@xxxxxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_irq.c            | 10 +++++-----
 drivers/gpu/drm/i915/intel_display.c       | 24 ++++++++++--------------
 drivers/gpu/drm/i915/intel_drv.h           |  6 +++---
 drivers/gpu/drm/i915/intel_fifo_underrun.c |  6 +++---
 4 files changed, 21 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 190f6aa5d15e..7960d2170750 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2132,10 +2132,10 @@ 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)
@@ -2169,13 +2169,13 @@ 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);
 }
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 9106ea32b048..21a8fea46ad9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1782,7 +1782,7 @@ 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));
@@ -1858,16 +1858,16 @@ void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv)
 	I915_WRITE(TRANS_CHICKEN2(PIPE_A), val);
 }
 
-enum transcoder intel_crtc_pch_transcoder(struct intel_crtc *crtc)
+enum pipe intel_crtc_pch_transcoder(struct intel_crtc *crtc)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 
 	WARN_ON(!crtc->config->has_pch_encoder);
 
 	if (HAS_PCH_LPT(dev_priv))
-		return TRANSCODER_A;
+		return PIPE_A;
 	else
-		return (enum transcoder) crtc->pipe;
+		return crtc->pipe;
 }
 
 /**
@@ -1906,7 +1906,7 @@ static void intel_enable_pipe(struct intel_crtc *crtc)
 		if (crtc->config->has_pch_encoder) {
 			/* if driving the PCH, we need FDI enabled */
 			assert_fdi_rx_pll_enabled(dev_priv,
-						  (enum pipe) intel_crtc_pch_transcoder(crtc));
+						  intel_crtc_pch_transcoder(crtc));
 			assert_fdi_tx_pll_enabled(dev_priv,
 						  (enum pipe) cpu_transcoder);
 		}
@@ -4573,7 +4573,7 @@ static void lpt_pch_enable(const struct intel_crtc_state *crtc_state)
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 
-	assert_pch_transcoder_disabled(dev_priv, TRANSCODER_A);
+	assert_pch_transcoder_disabled(dev_priv, PIPE_A);
 
 	lpt_program_iclkip(crtc);
 
@@ -5329,8 +5329,7 @@ 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,
-						      false);
+		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
 
 	intel_encoders_pre_pll_enable(crtc, pipe_config, old_state);
 
@@ -5415,8 +5414,7 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config,
 		intel_wait_for_vblank(dev_priv, pipe);
 		intel_wait_for_vblank(dev_priv, pipe);
 		intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
-		intel_set_pch_fifo_underrun_reporting(dev_priv, TRANSCODER_A,
-						      true);
+		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true);
 	}
 
 	/* If we change the relative order between pipe/planes enabling, we need
@@ -5513,8 +5511,7 @@ 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,
-						      false);
+		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, false);
 
 	intel_encoders_disable(crtc, old_crtc_state, old_state);
 
@@ -5542,8 +5539,7 @@ 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,
-						      true);
+		intel_set_pch_fifo_underrun_reporting(dev_priv, PIPE_A, true);
 }
 
 static void i9xx_pfit_enable(struct intel_crtc *crtc)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index f630c7af5020..d337ca88faed 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1169,12 +1169,12 @@ hdmi_to_dig_port(struct intel_hdmi *intel_hdmi)
 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);
 
@@ -1280,7 +1280,7 @@ void intel_set_cdclk(struct drm_i915_private *dev_priv,
 		     const struct intel_cdclk_state *cdclk_state);
 
 /* intel_display.c */
-enum transcoder intel_crtc_pch_transcoder(struct intel_crtc *crtc);
+enum pipe intel_crtc_pch_transcoder(struct intel_crtc *crtc);
 void intel_update_rawclk(struct drm_i915_private *dev_priv);
 int vlv_get_hpll_vco(struct drm_i915_private *dev_priv);
 int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
diff --git a/drivers/gpu/drm/i915/intel_fifo_underrun.c b/drivers/gpu/drm/i915/intel_fifo_underrun.c
index 966e255ca053..6c4054de4fda 100644
--- a/drivers/gpu/drm/i915/intel_fifo_underrun.c
+++ b/drivers/gpu/drm/i915/intel_fifo_underrun.c
@@ -313,11 +313,11 @@ 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 intel_crtc *crtc =
-		intel_get_crtc_for_pipe(dev_priv, (enum pipe) pch_transcoder);
+		intel_get_crtc_for_pipe(dev_priv, pch_transcoder);
 	unsigned long flags;
 	bool old;
 
@@ -390,7 +390,7 @@ 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)) {
-- 
2.13.2.932.g7449e964c-goog