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 %s.\n",
53 dflow->rot,
54 komeda_get_format_name(caps->fourcc,
55 fb->modifier));
56 return -EINVAL;
57 }
58
59 komeda_complete_data_flow_cfg(kplane->layer, dflow, fb);
60
61 return 0;
62 }
63
64 /**
65 * komeda_plane_atomic_check - build input data flow
66 * @plane: DRM plane
67 * @state: the plane state object
68 *
69 * RETURNS:
70 * Zero for success or -errno
71 */
72 static int
komeda_plane_atomic_check(struct drm_plane * plane,struct drm_plane_state * state)73 komeda_plane_atomic_check(struct drm_plane *plane,
74 struct drm_plane_state *state)
75 {
76 struct komeda_plane *kplane = to_kplane(plane);
77 struct komeda_plane_state *kplane_st = to_kplane_st(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 (!state->crtc || !state->fb)
85 return 0;
86
87 crtc_st = drm_atomic_get_crtc_state(state->state, state->crtc);
88 if (IS_ERR(crtc_st) || !crtc_st->enable) {
89 DRM_DEBUG_ATOMIC("Cannot update plane on a disabled CRTC.\n");
90 return -EINVAL;
91 }
92
93 /* crtc is inactive, skip the resource assignment */
94 if (!crtc_st->active)
95 return 0;
96
97 kcrtc_st = to_kcrtc_st(crtc_st);
98
99 err = komeda_plane_init_data_flow(state, kcrtc_st, &dflow);
100 if (err)
101 return err;
102
103 if (dflow.en_split)
104 err = komeda_build_layer_split_data_flow(layer,
105 kplane_st, kcrtc_st, &dflow);
106 else
107 err = komeda_build_layer_data_flow(layer,
108 kplane_st, kcrtc_st, &dflow);
109
110 return err;
111 }
112
113 /* plane doesn't represent a real HW, so there is no HW update for plane.
114 * komeda handles all the HW update in crtc->atomic_flush
115 */
116 static void
komeda_plane_atomic_update(struct drm_plane * plane,struct drm_plane_state * old_state)117 komeda_plane_atomic_update(struct drm_plane *plane,
118 struct drm_plane_state *old_state)
119 {
120 }
121
122 static const struct drm_plane_helper_funcs komeda_plane_helper_funcs = {
123 .atomic_check = komeda_plane_atomic_check,
124 .atomic_update = komeda_plane_atomic_update,
125 };
126
komeda_plane_destroy(struct drm_plane * plane)127 static void komeda_plane_destroy(struct drm_plane *plane)
128 {
129 drm_plane_cleanup(plane);
130
131 kfree(to_kplane(plane));
132 }
133
komeda_plane_reset(struct drm_plane * plane)134 static void komeda_plane_reset(struct drm_plane *plane)
135 {
136 struct komeda_plane_state *state;
137 struct komeda_plane *kplane = to_kplane(plane);
138
139 if (plane->state)
140 __drm_atomic_helper_plane_destroy_state(plane->state);
141
142 kfree(plane->state);
143 plane->state = NULL;
144
145 state = kzalloc(sizeof(*state), GFP_KERNEL);
146 if (state) {
147 state->base.rotation = DRM_MODE_ROTATE_0;
148 state->base.pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
149 state->base.alpha = DRM_BLEND_ALPHA_OPAQUE;
150 state->base.zpos = kplane->layer->base.id;
151 state->base.color_encoding = DRM_COLOR_YCBCR_BT601;
152 state->base.color_range = DRM_COLOR_YCBCR_LIMITED_RANGE;
153 plane->state = &state->base;
154 plane->state->plane = plane;
155 }
156 }
157
158 static struct drm_plane_state *
komeda_plane_atomic_duplicate_state(struct drm_plane * plane)159 komeda_plane_atomic_duplicate_state(struct drm_plane *plane)
160 {
161 struct komeda_plane_state *new;
162
163 if (WARN_ON(!plane->state))
164 return NULL;
165
166 new = kzalloc(sizeof(*new), GFP_KERNEL);
167 if (!new)
168 return NULL;
169
170 __drm_atomic_helper_plane_duplicate_state(plane, &new->base);
171
172 return &new->base;
173 }
174
175 static void
komeda_plane_atomic_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)176 komeda_plane_atomic_destroy_state(struct drm_plane *plane,
177 struct drm_plane_state *state)
178 {
179 __drm_atomic_helper_plane_destroy_state(state);
180 kfree(to_kplane_st(state));
181 }
182
183 static bool
komeda_plane_format_mod_supported(struct drm_plane * plane,u32 format,u64 modifier)184 komeda_plane_format_mod_supported(struct drm_plane *plane,
185 u32 format, u64 modifier)
186 {
187 struct komeda_dev *mdev = plane->dev->dev_private;
188 struct komeda_plane *kplane = to_kplane(plane);
189 u32 layer_type = kplane->layer->layer_type;
190
191 return komeda_format_mod_supported(&mdev->fmt_tbl, layer_type,
192 format, modifier, 0);
193 }
194
195 static const struct drm_plane_funcs komeda_plane_funcs = {
196 .update_plane = drm_atomic_helper_update_plane,
197 .disable_plane = drm_atomic_helper_disable_plane,
198 .destroy = komeda_plane_destroy,
199 .reset = komeda_plane_reset,
200 .atomic_duplicate_state = komeda_plane_atomic_duplicate_state,
201 .atomic_destroy_state = komeda_plane_atomic_destroy_state,
202 .format_mod_supported = komeda_plane_format_mod_supported,
203 };
204
205 /* for komeda, which is pipeline can be share between crtcs */
get_possible_crtcs(struct komeda_kms_dev * kms,struct komeda_pipeline * pipe)206 static u32 get_possible_crtcs(struct komeda_kms_dev *kms,
207 struct komeda_pipeline *pipe)
208 {
209 struct komeda_crtc *crtc;
210 u32 possible_crtcs = 0;
211 int i;
212
213 for (i = 0; i < kms->n_crtcs; i++) {
214 crtc = &kms->crtcs[i];
215
216 if ((pipe == crtc->master) || (pipe == crtc->slave))
217 possible_crtcs |= BIT(i);
218 }
219
220 return possible_crtcs;
221 }
222
223 static void
komeda_set_crtc_plane_mask(struct komeda_kms_dev * kms,struct komeda_pipeline * pipe,struct drm_plane * plane)224 komeda_set_crtc_plane_mask(struct komeda_kms_dev *kms,
225 struct komeda_pipeline *pipe,
226 struct drm_plane *plane)
227 {
228 struct komeda_crtc *kcrtc;
229 int i;
230
231 for (i = 0; i < kms->n_crtcs; i++) {
232 kcrtc = &kms->crtcs[i];
233
234 if (pipe == kcrtc->slave)
235 kcrtc->slave_planes |= BIT(drm_plane_index(plane));
236 }
237 }
238
239 /* use Layer0 as primary */
get_plane_type(struct komeda_kms_dev * kms,struct komeda_component * c)240 static u32 get_plane_type(struct komeda_kms_dev *kms,
241 struct komeda_component *c)
242 {
243 bool is_primary = (c->id == KOMEDA_COMPONENT_LAYER0);
244
245 return is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
246 }
247
komeda_plane_add(struct komeda_kms_dev * kms,struct komeda_layer * layer)248 static int komeda_plane_add(struct komeda_kms_dev *kms,
249 struct komeda_layer *layer)
250 {
251 struct komeda_dev *mdev = kms->base.dev_private;
252 struct komeda_component *c = &layer->base;
253 struct komeda_plane *kplane;
254 struct drm_plane *plane;
255 u32 *formats, n_formats = 0;
256 int err;
257
258 kplane = kzalloc(sizeof(*kplane), GFP_KERNEL);
259 if (!kplane)
260 return -ENOMEM;
261
262 plane = &kplane->base;
263 kplane->layer = layer;
264
265 formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl,
266 layer->layer_type, &n_formats);
267 if (!formats) {
268 kfree(kplane);
269 return -ENOMEM;
270 }
271
272 err = drm_universal_plane_init(&kms->base, plane,
273 get_possible_crtcs(kms, c->pipeline),
274 &komeda_plane_funcs,
275 formats, n_formats, komeda_supported_modifiers,
276 get_plane_type(kms, c),
277 "%s", c->name);
278
279 komeda_put_fourcc_list(formats);
280
281 if (err) {
282 kfree(kplane);
283 return err;
284 }
285
286 drm_plane_helper_add(plane, &komeda_plane_helper_funcs);
287
288 err = drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
289 layer->supported_rots);
290 if (err)
291 goto cleanup;
292
293 err = drm_plane_create_alpha_property(plane);
294 if (err)
295 goto cleanup;
296
297 err = drm_plane_create_blend_mode_property(plane,
298 BIT(DRM_MODE_BLEND_PIXEL_NONE) |
299 BIT(DRM_MODE_BLEND_PREMULTI) |
300 BIT(DRM_MODE_BLEND_COVERAGE));
301 if (err)
302 goto cleanup;
303
304 err = drm_plane_create_color_properties(plane,
305 BIT(DRM_COLOR_YCBCR_BT601) |
306 BIT(DRM_COLOR_YCBCR_BT709) |
307 BIT(DRM_COLOR_YCBCR_BT2020),
308 BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
309 BIT(DRM_COLOR_YCBCR_FULL_RANGE),
310 DRM_COLOR_YCBCR_BT601,
311 DRM_COLOR_YCBCR_LIMITED_RANGE);
312 if (err)
313 goto cleanup;
314
315 err = drm_plane_create_zpos_property(plane, layer->base.id, 0, 8);
316 if (err)
317 goto cleanup;
318
319 komeda_set_crtc_plane_mask(kms, c->pipeline, plane);
320
321 return 0;
322 cleanup:
323 komeda_plane_destroy(plane);
324 return err;
325 }
326
komeda_kms_add_planes(struct komeda_kms_dev * kms,struct komeda_dev * mdev)327 int komeda_kms_add_planes(struct komeda_kms_dev *kms, struct komeda_dev *mdev)
328 {
329 struct komeda_pipeline *pipe;
330 int i, j, err;
331
332 for (i = 0; i < mdev->n_pipelines; i++) {
333 pipe = mdev->pipelines[i];
334
335 for (j = 0; j < pipe->n_layers; j++) {
336 err = komeda_plane_add(kms, pipe->layers[j]);
337 if (err)
338 return err;
339 }
340 }
341
342 return 0;
343 }
344