[RFC 03/15] drm/i915: Cache opregion asls pointer

[Radhakrishna Sripada]

Asls offset is used to calculate the relative offset of vbt in ASLE
mailbox. Cache the address read from PCI config space to use later during
vbt extraction.

Signed-off-by: Radhakrishna Sripada <radhakrishna.srip...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_opregion.c | 4 +++-
 drivers/gpu/drm/i915/display/intel_opregion.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c 
b/drivers/gpu/drm/i915/display/intel_opregion.c
index fa25007fac3a..bd654d773ca7 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.c
+++ b/drivers/gpu/drm/i915/display/intel_opregion.c
@@ -903,6 +903,7 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
                return -ENOTSUPP;
        }
 
+       opregion->asls = asls;
        INIT_WORK(&opregion->asle_work, asle_work);
 
        base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
@@ -987,7 +988,7 @@ int intel_opregion_setup(struct drm_i915_private *dev_priv)
                    opregion->header->over.minor >= 1) {
                        drm_WARN_ON(&dev_priv->drm, rvda < OPREGION_SIZE);
 
-                       rvda += asls;
+                       rvda += opregion->asls;
                }
 
                opregion->rvda = memremap(rvda, opregion->asle->rvds,
@@ -1262,6 +1263,7 @@ void intel_opregion_cleanup(struct drm_i915_private *i915)
        opregion->swsci = NULL;
        opregion->asle = NULL;
        opregion->asle_ext = NULL;
+       opregion->asls = 0;
        vbt->vbt = NULL;
        opregion->lid_state = NULL;
 }
diff --git a/drivers/gpu/drm/i915/display/intel_opregion.h 
b/drivers/gpu/drm/i915/display/intel_opregion.h
index 7e1c8f1c2da5..03838fa39d0d 100644
--- a/drivers/gpu/drm/i915/display/intel_opregion.h
+++ b/drivers/gpu/drm/i915/display/intel_opregion.h
@@ -48,6 +48,7 @@ struct intel_opregion {
        struct opregion_asle_ext *asle_ext;
        void *rvda;
        u32 *lid_state;
+       u32 asls;
        struct work_struct asle_work;
        struct notifier_block acpi_notifier;
 };
-- 
2.34.1