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| author | Mahesh Kumar <mahesh1.kumar@intel.com> | 2018-08-24 15:02:25 +0530 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2018-09-13 14:33:03 -0700 |
| commit | 8a6c5447635c4039eb51801fb5dcdb8c7ef93cfb (patch) | |
| tree | 4f2b2be7a3dc2d8d6eb2a87469e13d102762ae34 /drivers/gpu/drm/i915/intel_pm.c | |
| parent | f361912aa9bfefbdf875b185fc93f2454d917b4a (diff) | |
| download | linux-stable-8a6c5447635c4039eb51801fb5dcdb8c7ef93cfb.tar.gz linux-stable-8a6c5447635c4039eb51801fb5dcdb8c7ef93cfb.tar.bz2 linux-stable-8a6c5447635c4039eb51801fb5dcdb8c7ef93cfb.zip | |
drm/i915/kbl+: Enable IPC only for symmetric memory configurations
IPC may cause underflows if not used with dual channel symmetric
memory configuration. Disable IPC for non symmetric configurations in
affected platforms.
Display WA #1141
Changes Since V1:
- Re-arrange the code.
- update wrapper to return if memory is symmetric (Rodrigo)
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/20180824093225.12598-6-mahesh1.kumar@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_pm.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index ac8177032faf..1db9b8328275 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -6121,6 +6121,11 @@ void intel_enable_ipc(struct drm_i915_private *dev_priv) if (IS_SKYLAKE(dev_priv)) dev_priv->ipc_enabled = false; + /* Display WA #1141: SKL:all KBL:all CFL */ + if ((IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) && + !dev_priv->dram_info.symmetric_memory) + dev_priv->ipc_enabled = false; + val = I915_READ(DISP_ARB_CTL2); if (dev_priv->ipc_enabled) |