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drm/i915: Fix and clean BDW PCH identification

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It seems in the past we have BDW with PCH not been propperly identified
and we force it to be LPT and we were warning !IS_HASWELL on propper identification.

Now that products are out there we are receiveing logs with this incorrect WARN.
And also according to local tests on all production BDW here ULT or HALO we don't
need this force anymore. So let's clean this block for real.

v2: Fix LPT_LP WARNs to avoid wrong warns on BDW_ULT (By Jani).

Reference: https://bugs.freedesktop.org/attachment.cgi?id=110972

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Xion Zhang <xiong.y.zhang@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Rodrigo Vivi 2015-01-21 10:33:53 -08:00 committed by Jani Nikula
parent af1a7301c7
commit a35cc9d0c0
1 changed files with 4 additions and 10 deletions
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14
drivers/gpu/drm/i915/i915_drv.c
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@ -462,19 +462,13 @@ void intel_detect_pch(struct drm_device *dev)
} else if (id == INTEL_PCH_LPT_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_LPT;
DRM_DEBUG_KMS("Found LynxPoint PCH\n");
WARN_ON(!IS_HASWELL(dev));
WARN_ON(IS_HSW_ULT(dev));
} else if (IS_BROADWELL(dev)) {
dev_priv->pch_type = PCH_LPT;
dev_priv->pch_id =
INTEL_PCH_LPT_LP_DEVICE_ID_TYPE;
DRM_DEBUG_KMS("This is Broadwell, assuming "
"LynxPoint LP PCH\n");
WARN_ON(!IS_HASWELL(dev) && !IS_BROADWELL(dev));
WARN_ON(IS_HSW_ULT(dev) || IS_BDW_ULT(dev));
} else if (id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_LPT;
DRM_DEBUG_KMS("Found LynxPoint LP PCH\n");
WARN_ON(!IS_HASWELL(dev));
WARN_ON(!IS_HSW_ULT(dev));
WARN_ON(!IS_HASWELL(dev) && !IS_BROADWELL(dev));
WARN_ON(!IS_HSW_ULT(dev) && !IS_BDW_ULT(dev));
} else if (id == INTEL_PCH_SPT_DEVICE_ID_TYPE) {
dev_priv->pch_type = PCH_SPT;
DRM_DEBUG_KMS("Found SunrisePoint PCH\n");