+ }
+
+ /* modifier is only used for scanout surfaces, so safe to use LINEAR here */
+ return etna_resource_alloc(pscreen, layout, DRM_FORMAT_MOD_LINEAR, templat);
+}
+
+enum modifier_priority {
+ MODIFIER_PRIORITY_INVALID = 0,
+ MODIFIER_PRIORITY_LINEAR,
+ MODIFIER_PRIORITY_SPLIT_TILED,
+ MODIFIER_PRIORITY_SPLIT_SUPER_TILED,
+ MODIFIER_PRIORITY_TILED,
+ MODIFIER_PRIORITY_SUPER_TILED,
+};
+
+static const uint64_t priority_to_modifier[] = {
+ [MODIFIER_PRIORITY_INVALID] = DRM_FORMAT_MOD_INVALID,
+ [MODIFIER_PRIORITY_LINEAR] = DRM_FORMAT_MOD_LINEAR,
+ [MODIFIER_PRIORITY_SPLIT_TILED] = DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED,
+ [MODIFIER_PRIORITY_SPLIT_SUPER_TILED] = DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED,
+ [MODIFIER_PRIORITY_TILED] = DRM_FORMAT_MOD_VIVANTE_TILED,
+ [MODIFIER_PRIORITY_SUPER_TILED] = DRM_FORMAT_MOD_VIVANTE_SUPER_TILED,
+};
+
+static uint64_t
+select_best_modifier(const struct etna_screen * screen,
+ const uint64_t *modifiers, const unsigned count)
+{
+ enum modifier_priority prio = MODIFIER_PRIORITY_INVALID;
+
+ for (int i = 0; i < count; i++) {
+ switch (modifiers[i]) {
+ case DRM_FORMAT_MOD_VIVANTE_SUPER_TILED:
+ if ((screen->specs.pixel_pipes > 1 && !screen->specs.single_buffer) ||
+ !screen->specs.can_supertile)
+ break;
+ prio = MAX2(prio, MODIFIER_PRIORITY_SUPER_TILED);
+ break;
+ case DRM_FORMAT_MOD_VIVANTE_TILED:
+ if (screen->specs.pixel_pipes > 1 && !screen->specs.single_buffer)
+ break;
+ prio = MAX2(prio, MODIFIER_PRIORITY_TILED);
+ break;
+ case DRM_FORMAT_MOD_VIVANTE_SPLIT_SUPER_TILED:
+ if ((screen->specs.pixel_pipes < 2) || !screen->specs.can_supertile)
+ break;
+ prio = MAX2(prio, MODIFIER_PRIORITY_SPLIT_SUPER_TILED);
+ break;
+ case DRM_FORMAT_MOD_VIVANTE_SPLIT_TILED:
+ if (screen->specs.pixel_pipes < 2)
+ break;
+ prio = MAX2(prio, MODIFIER_PRIORITY_SPLIT_TILED);
+ break;
+ case DRM_FORMAT_MOD_LINEAR:
+ prio = MAX2(prio, MODIFIER_PRIORITY_LINEAR);
+ break;
+ case DRM_FORMAT_MOD_INVALID:
+ default:
+ break;
+ }
+ }
+
+ return priority_to_modifier[prio];
+}
+
+static struct pipe_resource *
+etna_resource_create_modifiers(struct pipe_screen *pscreen,
+ const struct pipe_resource *templat,
+ const uint64_t *modifiers, int count)
+{
+ struct etna_screen *screen = etna_screen(pscreen);
+ struct pipe_resource tmpl = *templat;
+ uint64_t modifier = select_best_modifier(screen, modifiers, count);
+
+ if (modifier == DRM_FORMAT_MOD_INVALID)
+ return NULL;
+
+ /*
+ * We currently assume that all buffers allocated through this interface
+ * should be scanout enabled.
+ */
+ tmpl.bind |= PIPE_BIND_SCANOUT;