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drm/i915: cck reg used for checking DSI Pll locked 

Instead of pipe configuration reg, cck reg to be used for checking whether
DSI Pll is getting locked or not.

v2: dpio_lock unlocked now in case DSI PLL lock fails

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Gaurav K Singh 2014-12-05 14:16:58 +05:30 committed by Daniel Vetter
parent 58cf8887c9
commit 3770f0eec4
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/i915/intel_dsi_pll.c
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@ -272,12 +272,14 @@ void vlv_enable_dsi_pll(struct intel_encoder *encoder)
tmp |= DSI_PLL_VCO_EN;
vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_CONTROL, tmp);
mutex_unlock(&dev_priv->dpio_lock);
if (wait_for(vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL) &
DSI_PLL_LOCK, 20)) {
if (wait_for(I915_READ(PIPECONF(PIPE_A)) & PIPECONF_DSI_PLL_LOCKED, 20)) {
mutex_unlock(&dev_priv->dpio_lock);
DRM_ERROR("DSI PLL lock failed\n");
return;
}
mutex_unlock(&dev_priv->dpio_lock);
DRM_DEBUG_KMS("DSI PLL locked\n");
}