drm/i915: fix PCH PLL assertion check for 3 pipes
Add a couple of checks now that we're using the 3rd transcoder:
1) make sure the transcoder PLL enable bit is set for the transcoder
in question
2) when checking actual PLL enable, use the selected PLL number rather
than the transcoder number (they could be different now)
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Tested-By: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-By: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3b62b91..63f8141 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -803,6 +803,19 @@
u32 val;
bool cur_state;
+ if (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 * pipe)) & 8),
+ "transcoder %d PLL not enabled\n", pipe);
+
+ /* Convert the transcoder pipe number to a pll pipe number */
+ pipe = (pch_dpll >> (4 * pipe)) & 1;
+ }
+
reg = PCH_DPLL(pipe);
val = I915_READ(reg);
cur_state = !!(val & DPLL_VCO_ENABLE);