[PATCH v3 09/16] drm/i915: Fix MTL initial plane readout

[Ville Syrjala]

From: Ville Syrjälä <ville.syrj...@linux.intel.com>

MTL stolen memory looks more like local memory, so use the
(now fixed) lmem path when doing the initial plane readout.

Cc: Paz Zcharya <p...@chromium.org>
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
 .../drm/i915/display/intel_plane_initial.c    | 25 +++++++++++++------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.c 
b/drivers/gpu/drm/i915/display/intel_plane_initial.c
index db594ccf0323..c72d4cacf631 100644
--- a/drivers/gpu/drm/i915/display/intel_plane_initial.c
+++ b/drivers/gpu/drm/i915/display/intel_plane_initial.c
@@ -59,7 +59,7 @@ initial_plane_vma(struct drm_i915_private *i915,
                return NULL;
 
        base = round_down(plane_config->base, I915_GTT_MIN_ALIGNMENT);
-       if (IS_DGFX(i915)) {
+       if (IS_DGFX(i915) || HAS_LMEMBAR_SMEM_STOLEN(i915)) {
                gen8_pte_t __iomem *gte = to_gt(i915)->ggtt->gsm;
                gen8_pte_t pte;
 
@@ -73,11 +73,20 @@ initial_plane_vma(struct drm_i915_private *i915,
                }
 
                phys_base = pte & GEN12_GGTT_PTE_ADDR_MASK;
-               mem = i915->mm.regions[INTEL_REGION_LMEM_0];
+
+               if (IS_DGFX(i915))
+                       mem = i915->mm.regions[INTEL_REGION_LMEM_0];
+               else
+                       mem = i915->mm.stolen_region;
+               if (!mem) {
+                       drm_dbg_kms(&i915->drm,
+                                   "Initial plane memory region not 
initialized\n");
+                       return NULL;
+               }
 
                /*
-                * We don't currently expect this to ever be placed in the
-                * stolen portion.
+                * On lmem we don't currently expect this to
+                * ever be placed in the stolen portion.
                 */
                if (phys_base < mem->region.start || phys_base > 
mem->region.end) {
                        drm_err(&i915->drm,
@@ -94,11 +103,13 @@ initial_plane_vma(struct drm_i915_private *i915,
        } else {
                phys_base = base;
                mem = i915->mm.stolen_region;
+               if (!mem) {
+                       drm_dbg_kms(&i915->drm,
+                                   "Initial plane memory region not 
initialized\n");
+                       return NULL;
+               }
        }
 
-       if (!mem)
-               return NULL;
-
        size = round_up(plane_config->base + plane_config->size,
                        mem->min_page_size);
        size -= base;
-- 
2.41.0