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
intel_fb_bo_framebuffer_fini(struct drm_gem_object * obj)15 void intel_fb_bo_framebuffer_fini(struct drm_gem_object *obj)
16 {
17 /* Nothing to do for i915 */
18 }
19
intel_fb_bo_framebuffer_init(struct drm_framebuffer * fb,struct drm_gem_object * _obj,struct drm_mode_fb_cmd2 * mode_cmd)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 *
intel_fb_bo_lookup_valid_bo(struct drm_device * drm,struct drm_file * filp,const struct drm_mode_fb_cmd2 * mode_cmd)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