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drm/i915/skl+: don't trust IPC value set by BIOS 

If KMS decide to disable IPC make sure we override IPC configuration set
by BIOS.

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180824093225.12598-5-mahesh1.kumar@intel.com
This commit is contained in:
Mahesh Kumar 2018-08-24 15:02:24 +05:30 committed by Rodrigo Vivi
parent 86b592876c
commit f361912aa9
1 changed files with 1 additions and 3 deletions
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4
drivers/gpu/drm/i915/intel_pm.c
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@ -6118,10 +6118,8 @@ void intel_enable_ipc(struct drm_i915_private *dev_priv)
u32 val;
/* Display WA #0477 WaDisableIPC: skl */
if (IS_SKYLAKE(dev_priv)) {
if (IS_SKYLAKE(dev_priv))
dev_priv->ipc_enabled = false;
return;
}
val = I915_READ(DISP_ARB_CTL2);