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drm/i915: Use intel_ggtt_read_entry() in the BIOS FB takeover

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Use intel_ggtt_read_entry() instead of open coding the PTE
read/decode in the BIOS FB takeover code. So far this codepath
only covers platforms with LMEMBAR.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250313140838.29742-6-ville.syrjala@linux.intel.com
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
This commit is contained in:
Ville Syrjälä
2025-03-13 16:08:33 +02:00
parent d1b14231aa
commit 50596bdd4e
1 changed files with 10 additions and 7 deletions
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17
drivers/gpu/drm/i915/display/intel_plane_initial.c
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@@ -57,24 +57,27 @@ initial_plane_phys_lmem(struct intel_display *display,
struct intel_initial_plane_config *plane_config)
{
struct drm_i915_private *i915 = to_i915(display->drm);
gen8_pte_t __iomem *gte = to_gt(i915)->ggtt->gsm;
struct i915_ggtt *ggtt = to_gt(i915)->ggtt;
struct intel_memory_region *mem;
bool is_present, is_local;
dma_addr_t dma_addr;
gen8_pte_t pte;
u32 base;
base = round_down(plane_config->base, I915_GTT_MIN_ALIGNMENT);
gte += base / I915_GTT_PAGE_SIZE;
dma_addr = intel_ggtt_read_entry(&ggtt->vm, base, &is_present, &is_local);
pte = ioread64(gte);
if (!(pte & GEN12_GGTT_PTE_LM)) {
if (!is_present) {
drm_err(display->drm,
"Initial plane programming missing PTE_LM bit\n");
"Initial plane FB PTE not present\n");
return false;
}
dma_addr = pte & GEN12_GGTT_PTE_ADDR_MASK;
if (!is_local) {
drm_err(display->drm,
"Initial plane FB PTE not LMEM\n");
return false;
}
if (IS_DGFX(i915))
mem = i915->mm.regions[INTEL_REGION_LMEM_0];