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_display_types.h" 12 #include "intel_fb.h" 13 #include "intel_fb_bo.h" 14 15 void intel_fb_bo_framebuffer_fini(struct drm_gem_object *obj) 16 { 17 /* Nothing to do for i915 */ 18 } 19 20 int intel_fb_bo_framebuffer_init(struct drm_framebuffer *fb, 21 struct drm_gem_object *_obj, 22 struct drm_mode_fb_cmd2 *mode_cmd) 23 { 24 struct drm_i915_gem_object *obj = to_intel_bo(_obj); 25 struct intel_display *display = to_intel_display(obj->base.dev); 26 unsigned int tiling, stride; 27 28 i915_gem_object_lock(obj, NULL); 29 tiling = i915_gem_object_get_tiling(obj); 30 stride = i915_gem_object_get_stride(obj); 31 i915_gem_object_unlock(obj); 32 33 if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) { 34 /* 35 * If there's a fence, enforce that 36 * the fb modifier and tiling mode match. 37 */ 38 if (tiling != I915_TILING_NONE && 39 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 40 drm_dbg_kms(display->drm, 41 "tiling_mode doesn't match fb modifier\n"); 42 return -EINVAL; 43 } 44 } else { 45 if (tiling == I915_TILING_X) { 46 mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED; 47 } else if (tiling == I915_TILING_Y) { 48 drm_dbg_kms(display->drm, 49 "No Y tiling for legacy addfb\n"); 50 return -EINVAL; 51 } 52 } 53 54 /* 55 * gen2/3 display engine uses the fence if present, 56 * so the tiling mode must match the fb modifier exactly. 57 */ 58 if (DISPLAY_VER(display) < 4 && 59 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 60 drm_dbg_kms(display->drm, 61 "tiling_mode must match fb modifier exactly on gen2/3\n"); 62 return -EINVAL; 63 } 64 65 /* 66 * If there's a fence, enforce that 67 * the fb pitch and fence stride match. 68 */ 69 if (tiling != I915_TILING_NONE && mode_cmd->pitches[0] != stride) { 70 drm_dbg_kms(display->drm, 71 "pitch (%d) must match tiling stride (%d)\n", 72 mode_cmd->pitches[0], stride); 73 return -EINVAL; 74 } 75 76 return 0; 77 } 78 79 struct drm_gem_object * 80 intel_fb_bo_lookup_valid_bo(struct drm_device *drm, 81 struct drm_file *filp, 82 const struct drm_mode_fb_cmd2 *mode_cmd) 83 { 84 struct drm_i915_private *i915 = to_i915(drm); 85 struct drm_i915_gem_object *obj; 86 87 obj = i915_gem_object_lookup(filp, mode_cmd->handles[0]); 88 if (!obj) 89 return ERR_PTR(-ENOENT); 90 91 /* object is backed with LMEM for discrete */ 92 if (HAS_LMEM(i915) && !i915_gem_object_can_migrate(obj, INTEL_REGION_LMEM_0)) { 93 /* object is "remote", not in local memory */ 94 i915_gem_object_put(obj); 95 drm_dbg_kms(&i915->drm, "framebuffer must reside in local memory\n"); 96 return ERR_PTR(-EREMOTE); 97 } 98 99 return intel_bo_to_drm_bo(obj); 100 } 101