1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2021 Intel Corporation 4 */ 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 14 void intel_fb_bo_framebuffer_fini(struct drm_gem_object *obj) 15 { 16 /* Nothing to do for i915 */ 17 } 18 19 int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb, 20 struct drm_gem_object *_obj, 21 struct drm_mode_fb_cmd2 *mode_cmd) 22 { 23 struct drm_i915_gem_object *obj = to_intel_bo(_obj); 24 struct drm_i915_private *i915 = to_i915(obj->base.dev); 25 unsigned int tiling, stride; 26 27 i915_gem_object_lock(obj, NULL); 28 tiling = i915_gem_object_get_tiling(obj); 29 stride = i915_gem_object_get_stride(obj); 30 i915_gem_object_unlock(obj); 31 32 if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) { 33 /* 34 * If there's a fence, enforce that 35 * the fb modifier and tiling mode match. 36 */ 37 if (tiling != I915_TILING_NONE && 38 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 39 drm_dbg_kms(&i915->drm, 40 "tiling_mode doesn't match fb modifier\n"); 41 return -EINVAL; 42 } 43 } else { 44 if (tiling == I915_TILING_X) { 45 mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED; 46 } else if (tiling == I915_TILING_Y) { 47 drm_dbg_kms(&i915->drm, 48 "No Y tiling for legacy addfb\n"); 49 return -EINVAL; 50 } 51 } 52 53 /* 54 * gen2/3 display engine uses the fence if present, 55 * so the tiling mode must match the fb modifier exactly. 56 */ 57 if (DISPLAY_VER(i915) < 4 && 58 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 59 drm_dbg_kms(&i915->drm, 60 "tiling_mode must match fb modifier exactly on gen2/3\n"); 61 return -EINVAL; 62 } 63 64 /* 65 * If there's a fence, enforce that 66 * the fb pitch and fence stride match. 67 */ 68 if (tiling != I915_TILING_NONE && mode_cmd->pitches[0] != stride) { 69 drm_dbg_kms(&i915->drm, 70 "pitch (%d) must match tiling stride (%d)\n", 71 mode_cmd->pitches[0], stride); 72 return -EINVAL; 73 } 74 75 return 0; 76 } 77 78 struct drm_gem_object * 79 intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915, 80 struct drm_file *filp, 81 const struct drm_mode_fb_cmd2 *mode_cmd) 82 { 83 struct drm_i915_gem_object *obj; 84 85 obj = i915_gem_object_lookup(filp, mode_cmd->handles[0]); 86 if (!obj) 87 return ERR_PTR(-ENOENT); 88 89 /* object is backed with LMEM for discrete */ 90 if (HAS_LMEM(i915) && !i915_gem_object_can_migrate(obj, INTEL_REGION_LMEM_0)) { 91 /* object is "remote", not in local memory */ 92 i915_gem_object_put(obj); 93 drm_dbg_kms(&i915->drm, "framebuffer must reside in local memory\n"); 94 return ERR_PTR(-EREMOTE); 95 } 96 97 return intel_bo_to_drm_bo(obj); 98 } 99