1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
5 *
6 */
7 #include <drm/drm_atomic.h>
8 #include <drm/drm_atomic_helper.h>
9 #include <drm/drm_plane_helper.h>
10 #include <drm/drm_print.h>
11 #include "komeda_dev.h"
12 #include "komeda_kms.h"
13 #include "komeda_framebuffer.h"
14
15 static int
komeda_plane_init_data_flow(struct drm_plane_state * st,struct komeda_crtc_state * kcrtc_st,struct komeda_data_flow_cfg * dflow)16 komeda_plane_init_data_flow(struct drm_plane_state *st,
17 struct komeda_crtc_state *kcrtc_st,
18 struct komeda_data_flow_cfg *dflow)
19 {
20 struct komeda_plane *kplane = to_kplane(st->plane);
21 struct drm_framebuffer *fb = st->fb;
22 const struct komeda_format_caps *caps = to_kfb(fb)->format_caps;
23 struct komeda_pipeline *pipe = kplane->layer->base.pipeline;
24
25 memset(dflow, 0, sizeof(*dflow));
26
27 dflow->blending_zorder = st->normalized_zpos;
28 if (pipe == to_kcrtc(st->crtc)->master)
29 dflow->blending_zorder -= kcrtc_st->max_slave_zorder;
30 if (dflow->blending_zorder < 0) {
31 DRM_DEBUG_ATOMIC("%s zorder:%d < max_slave_zorder: %d.\n",
32 st->plane->name, st->normalized_zpos,
33 kcrtc_st->max_slave_zorder);
34 return -EINVAL;
35 }
36
37 dflow->pixel_blend_mode = st->pixel_blend_mode;
38 dflow->layer_alpha = st->alpha >> 8;
39
40 dflow->out_x = st->crtc_x;
41 dflow->out_y = st->crtc_y;
42 dflow->out_w = st->crtc_w;
43 dflow->out_h = st->crtc_h;
44
45 dflow->in_x = st->src_x >> 16;
46 dflow->in_y = st->src_y >> 16;
47 dflow->in_w = st->src_w >> 16;
48 dflow->in_h = st->src_h >> 16;
49
50 dflow->rot = drm_rotation_simplify(st->rotation, caps->supported_rots);
51 if (!has_bits(dflow->rot, caps->supported_rots)) {
52 DRM_DEBUG_ATOMIC("rotation(0x%x) isn't supported by %p4cc with modifier: 0x%llx.\n",
53 dflow->rot, &caps->fourcc, fb->modifier);
54 return -EINVAL;
55 }
56
57 komeda_complete_data_flow_cfg(kplane->layer, dflow, fb);
58
59 return 0;
60 }
61
62 /**
63 * komeda_plane_atomic_check - build input data flow
64 * @plane: DRM plane
65 * @state: the plane state object
66 *
67 * RETURNS:
68 * Zero for success or -errno
69 */
70 static int
komeda_plane_atomic_check(struct drm_plane * plane,struct drm_atomic_state * state)71 komeda_plane_atomic_check(struct drm_plane *plane,
72 struct drm_atomic_state *state)
73 {
74 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
75 plane);
76 struct komeda_plane *kplane = to_kplane(plane);
77 struct komeda_plane_state *kplane_st = to_kplane_st(new_plane_state);
78 struct komeda_layer *layer = kplane->layer;
79 struct drm_crtc_state *crtc_st;
80 struct komeda_crtc_state *kcrtc_st;
81 struct komeda_data_flow_cfg dflow;
82 int err;
83
84 if (!new_plane_state->crtc || !new_plane_state->fb)
85 return 0;
86
87 crtc_st = drm_atomic_get_crtc_state(state,
88 new_plane_state->crtc);
89 if (IS_ERR(crtc_st) || !crtc_st->enable) {
90 DRM_DEBUG_ATOMIC("Cannot update plane on a disabled CRTC.\n");
91 return -EINVAL;
92 }
93
94 /* crtc is inactive, skip the resource assignment */
95 if (!crtc_st->active)
96 return 0;
97
98 kcrtc_st = to_kcrtc_st(crtc_st);
99
100 err = komeda_plane_init_data_flow(new_plane_state, kcrtc_st, &dflow);
101 if (err)
102 return err;
103
104 if (dflow.en_split)
105 err = komeda_build_layer_split_data_flow(layer,
106 kplane_st, kcrtc_st, &dflow);
107 else
108 err = komeda_build_layer_data_flow(layer,
109 kplane_st, kcrtc_st, &dflow);
110
111 return err;
112 }
113
114 /* plane doesn't represent a real HW, so there is no HW update for plane.
115 * komeda handles all the HW update in crtc->atomic_flush
116 */
117 static void
komeda_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)118 komeda_plane_atomic_update(struct drm_plane *plane,
119 struct drm_atomic_state *state)
120 {
121 }
122
123 static const struct drm_plane_helper_funcs komeda_plane_helper_funcs = {
124 .atomic_check = komeda_plane_atomic_check,
125 .atomic_update = komeda_plane_atomic_update,
126 };
127
komeda_plane_destroy(struct drm_plane * plane)128 static void komeda_plane_destroy(struct drm_plane *plane)
129 {
130 drm_plane_cleanup(plane);
131
132 kfree(to_kplane(plane));
133 }
134
komeda_plane_reset(struct drm_plane * plane)135 static void komeda_plane_reset(struct drm_plane *plane)
136 {
137 struct komeda_plane_state *state;
138 struct komeda_plane *kplane = to_kplane(plane);
139
140 if (plane->state)
141 __drm_atomic_helper_plane_destroy_state(plane->state);
142
143 kfree(plane->state);
144 plane->state = NULL;
145
146 state = kzalloc(sizeof(*state), GFP_KERNEL);
147 if (state) {
148 state->base.rotation = DRM_MODE_ROTATE_0;
149 state->base.pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
150 state->base.alpha = DRM_BLEND_ALPHA_OPAQUE;
151 state->base.zpos = kplane->layer->base.id;
152 state->base.color_encoding = DRM_COLOR_YCBCR_BT601;
153 state->base.color_range = DRM_COLOR_YCBCR_LIMITED_RANGE;
154 plane->state = &state->base;
155 plane->state->plane = plane;
156 }
157 }
158
159 static struct drm_plane_state *
komeda_plane_atomic_duplicate_state(struct drm_plane * plane)160 komeda_plane_atomic_duplicate_state(struct drm_plane *plane)
161 {
162 struct komeda_plane_state *new;
163
164 if (WARN_ON(!plane->state))
165 return NULL;
166
167 new = kzalloc(sizeof(*new), GFP_KERNEL);
168 if (!new)
169 return NULL;
170
171 __drm_atomic_helper_plane_duplicate_state(plane, &new->base);
172
173 return &new->base;
174 }
175
176 static void
komeda_plane_atomic_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)177 komeda_plane_atomic_destroy_state(struct drm_plane *plane,
178 struct drm_plane_state *state)
179 {
180 __drm_atomic_helper_plane_destroy_state(state);
181 kfree(to_kplane_st(state));
182 }
183
184 static bool
komeda_plane_format_mod_supported(struct drm_plane * plane,u32 format,u64 modifier)185 komeda_plane_format_mod_supported(struct drm_plane *plane,
186 u32 format, u64 modifier)
187 {
188 struct komeda_dev *mdev = plane->dev->dev_private;
189 struct komeda_plane *kplane = to_kplane(plane);
190 u32 layer_type = kplane->layer->layer_type;
191
192 return komeda_format_mod_supported(&mdev->fmt_tbl, layer_type,
193 format, modifier, 0);
194 }
195
196 static const struct drm_plane_funcs komeda_plane_funcs = {
197 .update_plane = drm_atomic_helper_update_plane,
198 .disable_plane = drm_atomic_helper_disable_plane,
199 .destroy = komeda_plane_destroy,
200 .reset = komeda_plane_reset,
201 .atomic_duplicate_state = komeda_plane_atomic_duplicate_state,
202 .atomic_destroy_state = komeda_plane_atomic_destroy_state,
203 .format_mod_supported = komeda_plane_format_mod_supported,
204 };
205
206 /* for komeda, which is pipeline can be share between crtcs */
get_possible_crtcs(struct komeda_kms_dev * kms,struct komeda_pipeline * pipe)207 static u32 get_possible_crtcs(struct komeda_kms_dev *kms,
208 struct komeda_pipeline *pipe)
209 {
210 struct komeda_crtc *crtc;
211 u32 possible_crtcs = 0;
212 int i;
213
214 for (i = 0; i < kms->n_crtcs; i++) {
215 crtc = &kms->crtcs[i];
216
217 if ((pipe == crtc->master) || (pipe == crtc->slave))
218 possible_crtcs |= BIT(i);
219 }
220
221 return possible_crtcs;
222 }
223
224 static void
komeda_set_crtc_plane_mask(struct komeda_kms_dev * kms,struct komeda_pipeline * pipe,struct drm_plane * plane)225 komeda_set_crtc_plane_mask(struct komeda_kms_dev *kms,
226 struct komeda_pipeline *pipe,
227 struct drm_plane *plane)
228 {
229 struct komeda_crtc *kcrtc;
230 int i;
231
232 for (i = 0; i < kms->n_crtcs; i++) {
233 kcrtc = &kms->crtcs[i];
234
235 if (pipe == kcrtc->slave)
236 kcrtc->slave_planes |= BIT(drm_plane_index(plane));
237 }
238 }
239
240 /* use Layer0 as primary */
get_plane_type(struct komeda_kms_dev * kms,struct komeda_component * c)241 static u32 get_plane_type(struct komeda_kms_dev *kms,
242 struct komeda_component *c)
243 {
244 bool is_primary = (c->id == KOMEDA_COMPONENT_LAYER0);
245
246 return is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
247 }
248
komeda_plane_add(struct komeda_kms_dev * kms,struct komeda_layer * layer)249 static int komeda_plane_add(struct komeda_kms_dev *kms,
250 struct komeda_layer *layer)
251 {
252 struct komeda_dev *mdev = kms->base.dev_private;
253 struct komeda_component *c = &layer->base;
254 struct komeda_plane *kplane;
255 struct drm_plane *plane;
256 u32 *formats, n_formats = 0;
257 int err;
258
259 kplane = kzalloc(sizeof(*kplane), GFP_KERNEL);
260 if (!kplane)
261 return -ENOMEM;
262
263 plane = &kplane->base;
264 kplane->layer = layer;
265
266 formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
267 layer->layer_type, &n_formats);
268 if (!formats) {
269 kfree(kplane);
270 return -ENOMEM;
271 }
272
273 err = drm_universal_plane_init(&kms->base, plane,
274 get_possible_crtcs(kms, c->pipeline),
275 &komeda_plane_funcs,
276 formats, n_formats, komeda_supported_modifiers,
277 get_plane_type(kms, c),
278 "%s", c->name);
279
280 komeda_put_fourcc_list(formats);
281
282 if (err) {
283 kfree(kplane);
284 return err;
285 }
286
287 drm_plane_helper_add(plane, &komeda_plane_helper_funcs);
288
289 err = drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
290 layer->supported_rots);
291 if (err)
292 goto cleanup;
293
294 err = drm_plane_create_alpha_property(plane);
295 if (err)
296 goto cleanup;
297
298 err = drm_plane_create_blend_mode_property(plane,
299 BIT(DRM_MODE_BLEND_PIXEL_NONE) |
300 BIT(DRM_MODE_BLEND_PREMULTI) |
301 BIT(DRM_MODE_BLEND_COVERAGE));
302 if (err)
303 goto cleanup;
304
305 err = drm_plane_create_color_properties(plane,
306 BIT(DRM_COLOR_YCBCR_BT601) |
307 BIT(DRM_COLOR_YCBCR_BT709) |
308 BIT(DRM_COLOR_YCBCR_BT2020),
309 BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
310 BIT(DRM_COLOR_YCBCR_FULL_RANGE),
311 DRM_COLOR_YCBCR_BT601,
312 DRM_COLOR_YCBCR_LIMITED_RANGE);
313 if (err)
314 goto cleanup;
315
316 err = drm_plane_create_zpos_property(plane, layer->base.id, 0, 8);
317 if (err)
318 goto cleanup;
319
320 komeda_set_crtc_plane_mask(kms, c->pipeline, plane);
321
322 return 0;
323 cleanup:
324 komeda_plane_destroy(plane);
325 return err;
326 }
327
komeda_kms_add_planes(struct komeda_kms_dev * kms,struct komeda_dev * mdev)328 int komeda_kms_add_planes(struct komeda_kms_dev *kms, struct komeda_dev *mdev)
329 {
330 struct komeda_pipeline *pipe;
331 int i, j, err;
332
333 for (i = 0; i < mdev->n_pipelines; i++) {
334 pipe = mdev->pipelines[i];
335
336 for (j = 0; j < pipe->n_layers; j++) {
337 err = komeda_plane_add(kms, pipe->layers[j]);
338 if (err)
339 return err;
340 }
341 }
342
343 return 0;
344 }
345