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1/* SPDX-License-Identifier: MIT */2/*3 * Copyright © 2021 Intel Corporation4 */5 6#include <drm/drm_framebuffer.h>7 8#include "gem/i915_gem_object.h"9 10#include "i915_drv.h"11#include "intel_fb.h"12#include "intel_fb_bo.h"13 14void intel_fb_bo_framebuffer_fini(struct drm_i915_gem_object *obj)15{16 /* Nothing to do for i915 */17}18 19int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,20 struct drm_i915_gem_object *obj,21 struct drm_mode_fb_cmd2 *mode_cmd)22{23 struct drm_i915_private *i915 = to_i915(obj->base.dev);24 unsigned int tiling, stride;25 26 i915_gem_object_lock(obj, NULL);27 tiling = i915_gem_object_get_tiling(obj);28 stride = i915_gem_object_get_stride(obj);29 i915_gem_object_unlock(obj);30 31 if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) {32 /*33 * If there's a fence, enforce that34 * the fb modifier and tiling mode match.35 */36 if (tiling != I915_TILING_NONE &&37 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) {38 drm_dbg_kms(&i915->drm,39 "tiling_mode doesn't match fb modifier\n");40 return -EINVAL;41 }42 } else {43 if (tiling == I915_TILING_X) {44 mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED;45 } else if (tiling == I915_TILING_Y) {46 drm_dbg_kms(&i915->drm,47 "No Y tiling for legacy addfb\n");48 return -EINVAL;49 }50 }51 52 /*53 * gen2/3 display engine uses the fence if present,54 * so the tiling mode must match the fb modifier exactly.55 */56 if (DISPLAY_VER(i915) < 4 &&57 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) {58 drm_dbg_kms(&i915->drm,59 "tiling_mode must match fb modifier exactly on gen2/3\n");60 return -EINVAL;61 }62 63 /*64 * If there's a fence, enforce that65 * the fb pitch and fence stride match.66 */67 if (tiling != I915_TILING_NONE && mode_cmd->pitches[0] != stride) {68 drm_dbg_kms(&i915->drm,69 "pitch (%d) must match tiling stride (%d)\n",70 mode_cmd->pitches[0], stride);71 return -EINVAL;72 }73 74 return 0;75}76 77struct drm_i915_gem_object *78intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,79 struct drm_file *filp,80 const struct drm_mode_fb_cmd2 *mode_cmd)81{82 struct drm_i915_gem_object *obj;83 84 obj = i915_gem_object_lookup(filp, mode_cmd->handles[0]);85 if (!obj)86 return ERR_PTR(-ENOENT);87 88 /* object is backed with LMEM for discrete */89 if (HAS_LMEM(i915) && !i915_gem_object_can_migrate(obj, INTEL_REGION_LMEM_0)) {90 /* object is "remote", not in local memory */91 i915_gem_object_put(obj);92 drm_dbg_kms(&i915->drm, "framebuffer must reside in local memory\n");93 return ERR_PTR(-EREMOTE);94 }95 96 return obj;97}98