drm/i915: fork lpt version of ironlake_{en, dis}able_pch_transcoder

For now the new functions are just copies. Differences will be added
later.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 204fa8e..97365b8 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1721,6 +1721,57 @@ static void ironlake_enable_pch_transcoder(struct drm_i915_private *dev_priv,
                DRM_ERROR("failed to enable transcoder %d\n", pipe);
 }
 
+static void lpt_enable_pch_transcoder(struct drm_i915_private *dev_priv,
+                                     enum pipe pipe)
+{
+       int reg;
+       u32 val, pipeconf_val;
+       struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
+
+       /* PCH only available on ILK+ */
+       BUG_ON(dev_priv->info->gen < 5);
+
+       /* Make sure PCH DPLL is enabled */
+       assert_pch_pll_enabled(dev_priv,
+                              to_intel_crtc(crtc)->pch_pll,
+                              to_intel_crtc(crtc));
+
+       /* FDI must be feeding us bits for PCH ports */
+       assert_fdi_tx_enabled(dev_priv, pipe);
+       assert_fdi_rx_enabled(dev_priv, pipe);
+
+       if (IS_HASWELL(dev_priv->dev) && pipe > 0) {
+               DRM_ERROR("Attempting to enable transcoder on Haswell with pipe > 0\n");
+               return;
+       }
+       reg = TRANSCONF(pipe);
+       val = I915_READ(reg);
+       pipeconf_val = I915_READ(PIPECONF(pipe));
+
+       if (HAS_PCH_IBX(dev_priv->dev)) {
+               /*
+                * make the BPC in transcoder be consistent with
+                * that in pipeconf reg.
+                */
+               val &= ~PIPE_BPC_MASK;
+               val |= pipeconf_val & PIPE_BPC_MASK;
+       }
+
+       val &= ~TRANS_INTERLACE_MASK;
+       if ((pipeconf_val & PIPECONF_INTERLACE_MASK) == PIPECONF_INTERLACED_ILK)
+               if (HAS_PCH_IBX(dev_priv->dev) &&
+                   intel_pipe_has_type(crtc, INTEL_OUTPUT_SDVO))
+                       val |= TRANS_LEGACY_INTERLACED_ILK;
+               else
+                       val |= TRANS_INTERLACED;
+       else
+               val |= TRANS_PROGRESSIVE;
+
+       I915_WRITE(reg, val | TRANS_ENABLE);
+       if (wait_for(I915_READ(reg) & TRANS_STATE_ENABLE, 100))
+               DRM_ERROR("failed to enable transcoder %d\n", pipe);
+}
+
 static void ironlake_disable_pch_transcoder(struct drm_i915_private *dev_priv,
                                            enum pipe pipe)
 {
@@ -1743,6 +1794,28 @@ static void ironlake_disable_pch_transcoder(struct drm_i915_private *dev_priv,
                DRM_ERROR("failed to disable transcoder %d\n", pipe);
 }
 
+static void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv,
+                                      enum pipe pipe)
+{
+       int reg;
+       u32 val;
+
+       /* FDI relies on the transcoder */
+       assert_fdi_tx_disabled(dev_priv, pipe);
+       assert_fdi_rx_disabled(dev_priv, pipe);
+
+       /* Ports must be off as well */
+       assert_pch_ports_disabled(dev_priv, pipe);
+
+       reg = TRANSCONF(pipe);
+       val = I915_READ(reg);
+       val &= ~TRANS_ENABLE;
+       I915_WRITE(reg, val);
+       /* wait for PCH transcoder off, transcoder state */
+       if (wait_for((I915_READ(reg) & TRANS_STATE_ENABLE) == 0, 50))
+               DRM_ERROR("failed to disable transcoder %d\n", pipe);
+}
+
 /**
  * intel_enable_pipe - enable a pipe, asserting requirements
  * @dev_priv: i915 private structure
@@ -3194,7 +3267,7 @@ static void lpt_pch_enable(struct drm_crtc *crtc)
        I915_WRITE(_TRANS_VSYNC_A,  I915_READ(VSYNC(cpu_transcoder)));
        I915_WRITE(_TRANS_VSYNCSHIFT_A, I915_READ(VSYNCSHIFT(cpu_transcoder)));
 
-       ironlake_enable_pch_transcoder(dev_priv, intel_crtc->pipe);
+       lpt_enable_pch_transcoder(dev_priv, intel_crtc->pipe);
 }
 
 static void intel_put_pch_pll(struct intel_crtc *intel_crtc)
@@ -3589,7 +3662,7 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
 
        if (is_pch_port) {
                ironlake_fdi_disable(crtc);
-               ironlake_disable_pch_transcoder(dev_priv, pipe);
+               lpt_disable_pch_transcoder(dev_priv, pipe);
                intel_disable_pch_pll(intel_crtc);
                ironlake_fdi_pll_disable(intel_crtc);
        }