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_core.h" 12 #include "intel_display_types.h" 13 #include "intel_fb.h" 14 #include "intel_fb_bo.h" 15 16 void intel_fb_bo_framebuffer_fini(struct drm_gem_object *obj) 17 { 18 /* Nothing to do for i915 */ 19 } 20 21 int intel_fb_bo_framebuffer_init(struct drm_framebuffer *fb, 22 struct drm_gem_object *_obj, 23 struct drm_mode_fb_cmd2 *mode_cmd) 24 { 25 struct drm_i915_gem_object *obj = to_intel_bo(_obj); 26 struct intel_display *display = to_intel_display(obj->base.dev); 27 unsigned int tiling, stride; 28 29 i915_gem_object_lock(obj, NULL); 30 tiling = i915_gem_object_get_tiling(obj); 31 stride = i915_gem_object_get_stride(obj); 32 i915_gem_object_unlock(obj); 33 34 if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) { 35 /* 36 * If there's a fence, enforce that 37 * the fb modifier and tiling mode match. 38 */ 39 if (tiling != I915_TILING_NONE && 40 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 41 drm_dbg_kms(display->drm, 42 "tiling_mode doesn't match fb modifier\n"); 43 return -EINVAL; 44 } 45 } else { 46 if (tiling == I915_TILING_X) { 47 mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED; 48 } else if (tiling == I915_TILING_Y) { 49 drm_dbg_kms(display->drm, 50 "No Y tiling for legacy addfb\n"); 51 return -EINVAL; 52 } 53 } 54 55 /* 56 * gen2/3 display engine uses the fence if present, 57 * so the tiling mode must match the fb modifier exactly. 58 */ 59 if (DISPLAY_VER(display) < 4 && 60 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 61 drm_dbg_kms(display->drm, 62 "tiling_mode must match fb modifier exactly on gen2/3\n"); 63 return -EINVAL; 64 } 65 66 /* 67 * If there's a fence, enforce that 68 * the fb pitch and fence stride match. 69 */ 70 if (tiling != I915_TILING_NONE && mode_cmd->pitches[0] != stride) { 71 drm_dbg_kms(display->drm, 72 "pitch (%d) must match tiling stride (%d)\n", 73 mode_cmd->pitches[0], stride); 74 return -EINVAL; 75 } 76 77 return 0; 78 } 79 80 struct drm_gem_object * 81 intel_fb_bo_lookup_valid_bo(struct drm_device *drm, 82 struct drm_file *filp, 83 const struct drm_mode_fb_cmd2 *mode_cmd) 84 { 85 struct drm_i915_private *i915 = to_i915(drm); 86 struct drm_i915_gem_object *obj; 87 88 obj = i915_gem_object_lookup(filp, mode_cmd->handles[0]); 89 if (!obj) 90 return ERR_PTR(-ENOENT); 91 92 /* object is backed with LMEM for discrete */ 93 if (HAS_LMEM(i915) && !i915_gem_object_can_migrate(obj, INTEL_REGION_LMEM_0)) { 94 /* object is "remote", not in local memory */ 95 i915_gem_object_put(obj); 96 drm_dbg_kms(&i915->drm, "framebuffer must reside in local memory\n"); 97 return ERR_PTR(-EREMOTE); 98 } 99 100 return intel_bo_to_drm_bo(obj); 101 } 102