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(dev: 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(fb_modifier: 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(fb_modifier: 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(file: filp, handle: mode_cmd->handles[0]); |
85 | if (!obj) |
86 | return ERR_PTR(error: -ENOENT); |
87 | |
88 | /* object is backed with LMEM for discrete */ |
89 | if (HAS_LMEM(i915) && !i915_gem_object_can_migrate(obj, id: 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(error: -EREMOTE); |
94 | } |
95 | |
96 | return obj; |
97 | } |
98 | |