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_i915_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_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 that 34 * 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 that 65 * 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 77 struct drm_i915_gem_object * 78 intel_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