tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2015 MediaTek Inc.
4 * Author: CK Hu <ck.hu@mediatek.com>
5 */
6
7#include <drm/drm_atomic.h>
8#include <drm/drm_atomic_helper.h>
9#include <drm/drm_atomic_uapi.h>
10#include <drm/drm_fourcc.h>
11#include <drm/drm_gem_atomic_helper.h>
12#include <drm/drm_plane_helper.h>
13
14#include "mtk_drm_crtc.h"
15#include "mtk_drm_ddp_comp.h"
16#include "mtk_drm_drv.h"
17#include "mtk_drm_gem.h"
18#include "mtk_drm_plane.h"
19
20static const u32 formats[] = {
21 DRM_FORMAT_XRGB8888,
22 DRM_FORMAT_ARGB8888,
23 DRM_FORMAT_BGRX8888,
24 DRM_FORMAT_BGRA8888,
25 DRM_FORMAT_ABGR8888,
26 DRM_FORMAT_XBGR8888,
27 DRM_FORMAT_RGB888,
28 DRM_FORMAT_BGR888,
29 DRM_FORMAT_RGB565,
30 DRM_FORMAT_UYVY,
31 DRM_FORMAT_YUYV,
32};
33
34static void mtk_plane_reset(struct drm_plane *plane)
35{
36 struct mtk_plane_state *state;
37
38 if (plane->state) {
39 __drm_atomic_helper_plane_destroy_state(plane->state);
40
41 state = to_mtk_plane_state(plane->state);
42 memset(state, 0, sizeof(*state));
43 } else {
44 state = kzalloc(sizeof(*state), GFP_KERNEL);
45 if (!state)
46 return;
47 plane->state = &state->base;
48 }
49
50 state->base.plane = plane;
51 state->pending.format = DRM_FORMAT_RGB565;
52}
53
54static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
55{
56 struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
57 struct mtk_plane_state *state;
58
59 state = kzalloc(sizeof(*state), GFP_KERNEL);
60 if (!state)
61 return NULL;
62
63 __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
64
65 WARN_ON(state->base.plane != plane);
66
67 state->pending = old_state->pending;
68
69 return &state->base;
70}
71
72static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
73 struct drm_plane_state *state)
74{
75 __drm_atomic_helper_plane_destroy_state(state);
76 kfree(to_mtk_plane_state(state));
77}
78
79static int mtk_plane_atomic_async_check(struct drm_plane *plane,
80 struct drm_atomic_state *state)
81{
82 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
83 plane);
84 struct drm_crtc_state *crtc_state;
85 int ret;
86
87 if (plane != new_plane_state->crtc->cursor)
88 return -EINVAL;
89
90 if (!plane->state)
91 return -EINVAL;
92
93 if (!plane->state->fb)
94 return -EINVAL;
95
96 ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
97 to_mtk_plane_state(new_plane_state));
98 if (ret)
99 return ret;
100
101 if (state)
102 crtc_state = drm_atomic_get_existing_crtc_state(state,
103 new_plane_state->crtc);
104 else /* Special case for asynchronous cursor updates. */
105 crtc_state = new_plane_state->crtc->state;
106
107 return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
108 DRM_PLANE_HELPER_NO_SCALING,
109 DRM_PLANE_HELPER_NO_SCALING,
110 true, true);
111}
112
113static void mtk_plane_atomic_async_update(struct drm_plane *plane,
114 struct drm_atomic_state *state)
115{
116 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
117 plane);
118 struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
119
120 plane->state->crtc_x = new_state->crtc_x;
121 plane->state->crtc_y = new_state->crtc_y;
122 plane->state->crtc_h = new_state->crtc_h;
123 plane->state->crtc_w = new_state->crtc_w;
124 plane->state->src_x = new_state->src_x;
125 plane->state->src_y = new_state->src_y;
126 plane->state->src_h = new_state->src_h;
127 plane->state->src_w = new_state->src_w;
128 swap(plane->state->fb, new_state->fb);
129 new_plane_state->pending.async_dirty = true;
130
131 mtk_drm_crtc_async_update(new_state->crtc, plane, state);
132}
133
134static const struct drm_plane_funcs mtk_plane_funcs = {
135 .update_plane = drm_atomic_helper_update_plane,
136 .disable_plane = drm_atomic_helper_disable_plane,
137 .destroy = drm_plane_cleanup,
138 .reset = mtk_plane_reset,
139 .atomic_duplicate_state = mtk_plane_duplicate_state,
140 .atomic_destroy_state = mtk_drm_plane_destroy_state,
141};
142
143static int mtk_plane_atomic_check(struct drm_plane *plane,
144 struct drm_atomic_state *state)
145{
146 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
147 plane);
148 struct drm_framebuffer *fb = new_plane_state->fb;
149 struct drm_crtc_state *crtc_state;
150 int ret;
151
152 if (!fb)
153 return 0;
154
155 if (WARN_ON(!new_plane_state->crtc))
156 return 0;
157
158 ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane,
159 to_mtk_plane_state(new_plane_state));
160 if (ret)
161 return ret;
162
163 crtc_state = drm_atomic_get_crtc_state(state,
164 new_plane_state->crtc);
165 if (IS_ERR(crtc_state))
166 return PTR_ERR(crtc_state);
167
168 return drm_atomic_helper_check_plane_state(new_plane_state,
169 crtc_state,
170 DRM_PLANE_HELPER_NO_SCALING,
171 DRM_PLANE_HELPER_NO_SCALING,
172 true, true);
173}
174
175static void mtk_plane_atomic_disable(struct drm_plane *plane,
176 struct drm_atomic_state *state)
177{
178 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
179 plane);
180 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
181 mtk_plane_state->pending.enable = false;
182 wmb(); /* Make sure the above parameter is set before update */
183 mtk_plane_state->pending.dirty = true;
184}
185
186static void mtk_plane_atomic_update(struct drm_plane *plane,
187 struct drm_atomic_state *state)
188{
189 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
190 plane);
191 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
192 struct drm_crtc *crtc = new_state->crtc;
193 struct drm_framebuffer *fb = new_state->fb;
194 struct drm_gem_object *gem;
195 struct mtk_drm_gem_obj *mtk_gem;
196 unsigned int pitch, format;
197 dma_addr_t addr;
198
199 if (!crtc || WARN_ON(!fb))
200 return;
201
202 if (!new_state->visible) {
203 mtk_plane_atomic_disable(plane, state);
204 return;
205 }
206
207 gem = fb->obj[0];
208 mtk_gem = to_mtk_gem_obj(gem);
209 addr = mtk_gem->dma_addr;
210 pitch = fb->pitches[0];
211 format = fb->format->format;
212
213 addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
214 addr += (new_state->src.y1 >> 16) * pitch;
215
216 mtk_plane_state->pending.enable = true;
217 mtk_plane_state->pending.pitch = pitch;
218 mtk_plane_state->pending.format = format;
219 mtk_plane_state->pending.addr = addr;
220 mtk_plane_state->pending.x = new_state->dst.x1;
221 mtk_plane_state->pending.y = new_state->dst.y1;
222 mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
223 mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
224 mtk_plane_state->pending.rotation = new_state->rotation;
225 wmb(); /* Make sure the above parameters are set before update */
226 mtk_plane_state->pending.dirty = true;
227}
228
229static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
230 .prepare_fb = drm_gem_plane_helper_prepare_fb,
231 .atomic_check = mtk_plane_atomic_check,
232 .atomic_update = mtk_plane_atomic_update,
233 .atomic_disable = mtk_plane_atomic_disable,
234 .atomic_async_update = mtk_plane_atomic_async_update,
235 .atomic_async_check = mtk_plane_atomic_async_check,
236};
237
238int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
239 unsigned long possible_crtcs, enum drm_plane_type type,
240 unsigned int supported_rotations)
241{
242 int err;
243
244 err = drm_universal_plane_init(dev, plane, possible_crtcs,
245 &mtk_plane_funcs, formats,
246 ARRAY_SIZE(formats), NULL, type, NULL);
247 if (err) {
248 DRM_ERROR("failed to initialize plane\n");
249 return err;
250 }
251
252 if (supported_rotations & ~DRM_MODE_ROTATE_0) {
253 err = drm_plane_create_rotation_property(plane,
254 DRM_MODE_ROTATE_0,
255 supported_rotations);
256 if (err)
257 DRM_INFO("Create rotation property failed\n");
258 }
259
260 drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
261
262 return 0;
263}