drm/i915/display: Plane capability for 64k phys alignment

Some plane formats have been designed to require 64k physical alignment.
By returning whether this is the case for certain formats, we do not
need to hardcode this check inside Xe.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240826170117.327709-2-maarten.lankhorst@linux.intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
index d2716915d046..5be7bb43e2e0 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.c
+++ b/drivers/gpu/drm/i915/display/intel_fb.c
@@ -169,7 +169,7 @@ static const struct intel_modifier_desc intel_modifiers[] = {
 	}, {
 		.modifier = I915_FORMAT_MOD_4_TILED_BMG_CCS,
 		.display_ver = { 14, -1 },
-		.plane_caps = INTEL_PLANE_CAP_TILING_4,
+		.plane_caps = INTEL_PLANE_CAP_TILING_4 | INTEL_PLANE_CAP_NEED64K_PHYS,
 	}, {
 		.modifier = I915_FORMAT_MOD_4_TILED_MTL_MC_CCS,
 		.display_ver = { 14, 14 },
@@ -420,6 +420,24 @@ bool intel_fb_is_mc_ccs_modifier(u64 modifier)
 				      INTEL_PLANE_CAP_CCS_MC);
 }
 
+/**
+ * intel_fb_needs_64k_phys: Check if modifier requires 64k physical placement.
+ * @modifier: Modifier to check
+ *
+ * Returns:
+ * Returns %true if @modifier requires 64k aligned physical pages.
+ */
+bool intel_fb_needs_64k_phys(u64 modifier)
+{
+	const struct intel_modifier_desc *md = lookup_modifier_or_null(modifier);
+
+	if (!md)
+		return false;
+
+	return plane_caps_contain_any(md->plane_caps,
+				      INTEL_PLANE_CAP_NEED64K_PHYS);
+}
+
 static bool check_modifier_display_ver_range(const struct intel_modifier_desc *md,
 					     u8 display_ver_from, u8 display_ver_until)
 {