Prevent bogus asserts on DDI-related paths.
Signed-off-by: Eugeni Dodonov <eugeni.dodonov at intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 35 ++++++++++++++++++++++++----------
1 file changed, 25 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index ca0edbf..b2d3dc1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -954,9 +954,16 @@ static void assert_fdi_tx(struct drm_i915_private *dev_priv,
u32 val;
bool cur_state;
- reg = FDI_TX_CTL(pipe);
- val = I915_READ(reg);
- cur_state = !!(val & FDI_TX_ENABLE);
+ if (IS_HASWELL(dev_priv->dev)) {
+ /* On Haswell, DDI is used instead of FDI_TX_CTL */
+ reg = DDI_FUNC_CTL(pipe);
+ val = I915_READ(reg);
+ cur_state = !!(val & PIPE_DDI_FUNC_ENABLE);
+ } else {
+ reg = FDI_TX_CTL(pipe);
+ val = I915_READ(reg);
+ cur_state = !!(val & FDI_TX_ENABLE);
+ }
WARN(cur_state != state,
"FDI TX state assertion failure (expected %s, current %s)\n",
state_string(state), state_string(cur_state));
@@ -991,6 +998,10 @@ static void assert_fdi_tx_pll_enabled(struct drm_i915_private *dev_priv,
if (dev_priv->info->gen == 5)
return;
+ /* On Haswell, DDI ports are responsible for the FDI PLL setup */
+ if (IS_HASWELL(dev_priv->dev))
+ return;
+
reg = FDI_TX_CTL(pipe);
val = I915_READ(reg);
WARN(!(val & FDI_TX_PLL_ENABLE), "FDI TX PLL assertion failure, should be active but is disabled\n");
@@ -2515,14 +2526,18 @@ static void ironlake_fdi_pll_enable(struct drm_crtc *crtc)
POSTING_READ(reg);
udelay(200);
- /* Enable CPU FDI TX PLL, always on for Ironlake */
- reg = FDI_TX_CTL(pipe);
- temp = I915_READ(reg);
- if ((temp & FDI_TX_PLL_ENABLE) == 0) {
- I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
+ /* On Haswell, the PLL configuration for ports and pipes is handled
+ * separately, as part of DDI setup */
+ if (!IS_HASWELL(dev)) {
+ /* Enable CPU FDI TX PLL, always on for Ironlake */
+ reg = FDI_TX_CTL(pipe);
+ temp = I915_READ(reg);
+ if ((temp & FDI_TX_PLL_ENABLE) == 0) {
+ I915_WRITE(reg, temp | FDI_TX_PLL_ENABLE);
- POSTING_READ(reg);
- udelay(100);
+ POSTING_READ(reg);
+ udelay(100);
+ }
}
}
--
1.7.10
