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authorChris Wilson2012-05-20 18:10:50 +0100
committerDaniel Vetter2012-05-24 17:54:00 +0200
commit92b27b088c51bd9a979e39e184c41b1f57352dca (patch)
treeda354a6cf9d4dd54f4149bb0d786533425c03507 /drivers/gpu
parent7b9e0ae6da0a7eaf2680a1a788f08df123724f3b (diff)
drm/i915: Fix PCH PLL assertions to not assume CRTC:PLL relationship
The existing assertions were written under the assumption that we wanted to test the related PLL to a CRTC. With the split of PLL into a separately managed entity which may be shared amongst CRTCs, we need to pass in both the CRTC and the PLL to the assertion routine. Occassionally, this means passing NULL for the CRTC as we wish to check the status of the PLL irrespective of the current CRTC. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/i915/intel_display.c56
1 files changed, 33 insertions, 23 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3c71850ddf20..67ed819220a4 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -910,9 +910,10 @@ static void assert_pll(struct drm_i915_private *dev_priv,
/* For ILK+ */
static void assert_pch_pll(struct drm_i915_private *dev_priv,
- struct intel_crtc *intel_crtc, bool state)
+ struct intel_pch_pll *pll,
+ struct intel_crtc *crtc,
+ bool state)
{
- int reg;
u32 val;
bool cur_state;
@@ -921,30 +922,37 @@ static void assert_pch_pll(struct drm_i915_private *dev_priv,
return;
}
- if (!intel_crtc->pch_pll) {
- WARN(1, "asserting PCH PLL enabled with no PLL\n");
+ if (WARN (!pll,
+ "asserting PCH PLL %s with no PLL\n", state_string(state)))
return;
- }
- if (HAS_PCH_CPT(dev_priv->dev)) {
+ val = I915_READ(pll->pll_reg);
+ cur_state = !!(val & DPLL_VCO_ENABLE);
+ WARN(cur_state != state,
+ "PCH PLL state for reg %x assertion failure (expected %s, current %s), val=%08x\n",
+ pll->pll_reg, state_string(state), state_string(cur_state), val);
+
+ /* Make sure the selected PLL is correctly attached to the transcoder */
+ if (crtc && HAS_PCH_CPT(dev_priv->dev)) {
u32 pch_dpll;
pch_dpll = I915_READ(PCH_DPLL_SEL);
-
- /* Make sure the selected PLL is enabled to the transcoder */
- WARN(!((pch_dpll >> (4 * intel_crtc->pipe)) & 8),
- "transcoder %d PLL not enabled\n", intel_crtc->pipe);
+ cur_state = pll->pll_reg == _PCH_DPLL_B;
+ if (!WARN(((pch_dpll >> (4 * crtc->pipe)) & 1) != cur_state,
+ "PLL[%d] not attached to this transcoder %d: %08x\n",
+ cur_state, crtc->pipe, pch_dpll)) {
+ cur_state = !!(val >> (4*crtc->pipe + 3));
+ WARN(cur_state != state,
+ "PLL[%d] not %s on this transcoder %d: %08x\n",
+ pll->pll_reg == _PCH_DPLL_B,
+ state_string(state),
+ crtc->pipe,
+ val);
+ }
}
-
- reg = intel_crtc->pch_pll->pll_reg;
- val = I915_READ(reg);
- cur_state = !!(val & DPLL_VCO_ENABLE);
- WARN(cur_state != state,
- "PCH PLL state assertion failure (expected %s, current %s)\n",
- state_string(state), state_string(cur_state));
}
-#define assert_pch_pll_enabled(d, p) assert_pch_pll(d, p, true)
-#define assert_pch_pll_disabled(d, p) assert_pch_pll(d, p, false)
+#define assert_pch_pll_enabled(d, p, c) assert_pch_pll(d, p, c, true)
+#define assert_pch_pll_disabled(d, p, c) assert_pch_pll(d, p, c, false)
static void assert_fdi_tx(struct drm_i915_private *dev_priv,
enum pipe pipe, bool state)
@@ -1424,7 +1432,7 @@ static void intel_enable_pch_pll(struct intel_crtc *intel_crtc)
assert_pch_refclk_enabled(dev_priv);
if (pll->active++ && pll->on) {
- assert_pch_pll_enabled(dev_priv, intel_crtc);
+ assert_pch_pll_enabled(dev_priv, pll, NULL);
return;
}
@@ -1460,12 +1468,12 @@ static void intel_disable_pch_pll(struct intel_crtc *intel_crtc)
intel_crtc->base.base.id);
if (WARN_ON(pll->active == 0)) {
- assert_pch_pll_disabled(dev_priv, intel_crtc);
+ assert_pch_pll_disabled(dev_priv, pll, NULL);
return;
}
if (--pll->active) {
- assert_pch_pll_enabled(dev_priv, intel_crtc);
+ assert_pch_pll_enabled(dev_priv, pll, NULL);
return;
}
@@ -1495,7 +1503,9 @@ static void intel_enable_transcoder(struct drm_i915_private *dev_priv,
BUG_ON(dev_priv->info->gen < 5);
/* Make sure PCH DPLL is enabled */
- assert_pch_pll_enabled(dev_priv, to_intel_crtc(crtc));
+ 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);