1 /* SPDX-License-Identifier: MIT */ 2 /* 3 * Copyright © 2021 Intel Corporation 4 */ 5 6 #include <drm/drm_framebuffer.h> 7 #include <drm/drm_print.h> 8 9 #include "gem/i915_gem_object.h" 10 11 #include "i915_drv.h" 12 #include "intel_display_core.h" 13 #include "intel_display_types.h" 14 #include "intel_fb.h" 15 #include "intel_fb_bo.h" 16 17 void intel_fb_bo_framebuffer_fini(struct drm_gem_object *obj) 18 { 19 /* Nothing to do for i915 */ 20 } 21 22 int intel_fb_bo_framebuffer_init(struct drm_framebuffer *fb, 23 struct drm_gem_object *_obj, 24 struct drm_mode_fb_cmd2 *mode_cmd) 25 { 26 struct drm_i915_gem_object *obj = to_intel_bo(_obj); 27 struct intel_display *display = to_intel_display(obj->base.dev); 28 unsigned int tiling, stride; 29 30 i915_gem_object_lock(obj, NULL); 31 tiling = i915_gem_object_get_tiling(obj); 32 stride = i915_gem_object_get_stride(obj); 33 i915_gem_object_unlock(obj); 34 35 if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) { 36 /* 37 * If there's a fence, enforce that 38 * the fb modifier and tiling mode match. 39 */ 40 if (tiling != I915_TILING_NONE && 41 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 42 drm_dbg_kms(display->drm, 43 "tiling_mode doesn't match fb modifier\n"); 44 return -EINVAL; 45 } 46 } else { 47 if (tiling == I915_TILING_X) { 48 mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED; 49 } else if (tiling == I915_TILING_Y) { 50 drm_dbg_kms(display->drm, 51 "No Y tiling for legacy addfb\n"); 52 return -EINVAL; 53 } 54 } 55 56 /* 57 * gen2/3 display engine uses the fence if present, 58 * so the tiling mode must match the fb modifier exactly. 59 */ 60 if (DISPLAY_VER(display) < 4 && 61 tiling != intel_fb_modifier_to_tiling(mode_cmd->modifier[0])) { 62 drm_dbg_kms(display->drm, 63 "tiling_mode must match fb modifier exactly on gen2/3\n"); 64 return -EINVAL; 65 } 66 67 /* 68 * If there's a fence, enforce that 69 * the fb pitch and fence stride match. 70 */ 71 if (tiling != I915_TILING_NONE && mode_cmd->pitches[0] != stride) { 72 drm_dbg_kms(display->drm, 73 "pitch (%d) must match tiling stride (%d)\n", 74 mode_cmd->pitches[0], stride); 75 return -EINVAL; 76 } 77 78 return 0; 79 } 80 81 struct drm_gem_object * 82 intel_fb_bo_lookup_valid_bo(struct drm_device *drm, 83 struct drm_file *filp, 84 const struct drm_mode_fb_cmd2 *mode_cmd) 85 { 86 struct drm_i915_private *i915 = to_i915(drm); 87 struct drm_i915_gem_object *obj; 88 89 obj = i915_gem_object_lookup(filp, mode_cmd->handles[0]); 90 if (!obj) 91 return ERR_PTR(-ENOENT); 92 93 /* object is backed with LMEM for discrete */ 94 if (HAS_LMEM(i915) && !i915_gem_object_can_migrate(obj, INTEL_REGION_LMEM_0)) { 95 /* object is "remote", not in local memory */ 96 i915_gem_object_put(obj); 97 drm_dbg_kms(&i915->drm, "framebuffer must reside in local memory\n"); 98 return ERR_PTR(-EREMOTE); 99 } 100 101 return intel_bo_to_drm_bo(obj); 102 } 103