1 /*
2  * Copyright (C) 2013 Red Hat
3  * Author: Rob Clark <robdclark@gmail.com>
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 as published by
7  * the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * You should have received a copy of the GNU General Public License along with
15  * this program.  If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #include "mdp4_kms.h"
19 
20 #define DOWN_SCALE_MAX	8
21 #define UP_SCALE_MAX	8
22 
23 struct mdp4_plane {
24 	struct drm_plane base;
25 	const char *name;
26 
27 	enum mdp4_pipe pipe;
28 
29 	uint32_t caps;
30 	uint32_t nformats;
31 	uint32_t formats[32];
32 
33 	bool enabled;
34 };
35 #define to_mdp4_plane(x) container_of(x, struct mdp4_plane, base)
36 
37 /* MDP format helper functions */
38 static inline
39 enum mdp4_frame_format mdp4_get_frame_format(struct drm_framebuffer *fb)
40 {
41 	bool is_tile = false;
42 
43 	if (fb->modifier == DRM_FORMAT_MOD_SAMSUNG_64_32_TILE)
44 		is_tile = true;
45 
46 	if (fb->format->format == DRM_FORMAT_NV12 && is_tile)
47 		return FRAME_TILE_YCBCR_420;
48 
49 	return FRAME_LINEAR;
50 }
51 
52 static void mdp4_plane_set_scanout(struct drm_plane *plane,
53 		struct drm_framebuffer *fb);
54 static int mdp4_plane_mode_set(struct drm_plane *plane,
55 		struct drm_crtc *crtc, struct drm_framebuffer *fb,
56 		int crtc_x, int crtc_y,
57 		unsigned int crtc_w, unsigned int crtc_h,
58 		uint32_t src_x, uint32_t src_y,
59 		uint32_t src_w, uint32_t src_h);
60 
61 static struct mdp4_kms *get_kms(struct drm_plane *plane)
62 {
63 	struct msm_drm_private *priv = plane->dev->dev_private;
64 	return to_mdp4_kms(to_mdp_kms(priv->kms));
65 }
66 
67 static void mdp4_plane_destroy(struct drm_plane *plane)
68 {
69 	struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
70 
71 	drm_plane_helper_disable(plane, NULL);
72 	drm_plane_cleanup(plane);
73 
74 	kfree(mdp4_plane);
75 }
76 
77 /* helper to install properties which are common to planes and crtcs */
78 static void mdp4_plane_install_properties(struct drm_plane *plane,
79 		struct drm_mode_object *obj)
80 {
81 	// XXX
82 }
83 
84 static int mdp4_plane_set_property(struct drm_plane *plane,
85 		struct drm_property *property, uint64_t val)
86 {
87 	// XXX
88 	return -EINVAL;
89 }
90 
91 static const struct drm_plane_funcs mdp4_plane_funcs = {
92 		.update_plane = drm_atomic_helper_update_plane,
93 		.disable_plane = drm_atomic_helper_disable_plane,
94 		.destroy = mdp4_plane_destroy,
95 		.set_property = mdp4_plane_set_property,
96 		.reset = drm_atomic_helper_plane_reset,
97 		.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
98 		.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
99 };
100 
101 static void mdp4_plane_cleanup_fb(struct drm_plane *plane,
102 				  struct drm_plane_state *old_state)
103 {
104 	struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
105 	struct mdp4_kms *mdp4_kms = get_kms(plane);
106 	struct msm_kms *kms = &mdp4_kms->base.base;
107 	struct drm_framebuffer *fb = old_state->fb;
108 
109 	if (!fb)
110 		return;
111 
112 	DBG("%s: cleanup: FB[%u]", mdp4_plane->name, fb->base.id);
113 	msm_framebuffer_cleanup(fb, kms->aspace);
114 }
115 
116 
117 static int mdp4_plane_atomic_check(struct drm_plane *plane,
118 		struct drm_plane_state *state)
119 {
120 	return 0;
121 }
122 
123 static void mdp4_plane_atomic_update(struct drm_plane *plane,
124 				     struct drm_plane_state *old_state)
125 {
126 	struct drm_plane_state *state = plane->state;
127 	int ret;
128 
129 	ret = mdp4_plane_mode_set(plane,
130 			state->crtc, state->fb,
131 			state->crtc_x, state->crtc_y,
132 			state->crtc_w, state->crtc_h,
133 			state->src_x,  state->src_y,
134 			state->src_w, state->src_h);
135 	/* atomic_check should have ensured that this doesn't fail */
136 	WARN_ON(ret < 0);
137 }
138 
139 static const struct drm_plane_helper_funcs mdp4_plane_helper_funcs = {
140 		.prepare_fb = msm_atomic_prepare_fb,
141 		.cleanup_fb = mdp4_plane_cleanup_fb,
142 		.atomic_check = mdp4_plane_atomic_check,
143 		.atomic_update = mdp4_plane_atomic_update,
144 };
145 
146 static void mdp4_plane_set_scanout(struct drm_plane *plane,
147 		struct drm_framebuffer *fb)
148 {
149 	struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
150 	struct mdp4_kms *mdp4_kms = get_kms(plane);
151 	struct msm_kms *kms = &mdp4_kms->base.base;
152 	enum mdp4_pipe pipe = mdp4_plane->pipe;
153 
154 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_STRIDE_A(pipe),
155 			MDP4_PIPE_SRC_STRIDE_A_P0(fb->pitches[0]) |
156 			MDP4_PIPE_SRC_STRIDE_A_P1(fb->pitches[1]));
157 
158 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_STRIDE_B(pipe),
159 			MDP4_PIPE_SRC_STRIDE_B_P2(fb->pitches[2]) |
160 			MDP4_PIPE_SRC_STRIDE_B_P3(fb->pitches[3]));
161 
162 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP0_BASE(pipe),
163 			msm_framebuffer_iova(fb, kms->aspace, 0));
164 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP1_BASE(pipe),
165 			msm_framebuffer_iova(fb, kms->aspace, 1));
166 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP2_BASE(pipe),
167 			msm_framebuffer_iova(fb, kms->aspace, 2));
168 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRCP3_BASE(pipe),
169 			msm_framebuffer_iova(fb, kms->aspace, 3));
170 }
171 
172 static void mdp4_write_csc_config(struct mdp4_kms *mdp4_kms,
173 		enum mdp4_pipe pipe, struct csc_cfg *csc)
174 {
175 	int i;
176 
177 	for (i = 0; i < ARRAY_SIZE(csc->matrix); i++) {
178 		mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_MV(pipe, i),
179 				csc->matrix[i]);
180 	}
181 
182 	for (i = 0; i < ARRAY_SIZE(csc->post_bias) ; i++) {
183 		mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_PRE_BV(pipe, i),
184 				csc->pre_bias[i]);
185 
186 		mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_POST_BV(pipe, i),
187 				csc->post_bias[i]);
188 	}
189 
190 	for (i = 0; i < ARRAY_SIZE(csc->post_clamp) ; i++) {
191 		mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_PRE_LV(pipe, i),
192 				csc->pre_clamp[i]);
193 
194 		mdp4_write(mdp4_kms, REG_MDP4_PIPE_CSC_POST_LV(pipe, i),
195 				csc->post_clamp[i]);
196 	}
197 }
198 
199 #define MDP4_VG_PHASE_STEP_DEFAULT	0x20000000
200 
201 static int mdp4_plane_mode_set(struct drm_plane *plane,
202 		struct drm_crtc *crtc, struct drm_framebuffer *fb,
203 		int crtc_x, int crtc_y,
204 		unsigned int crtc_w, unsigned int crtc_h,
205 		uint32_t src_x, uint32_t src_y,
206 		uint32_t src_w, uint32_t src_h)
207 {
208 	struct drm_device *dev = plane->dev;
209 	struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
210 	struct mdp4_kms *mdp4_kms = get_kms(plane);
211 	enum mdp4_pipe pipe = mdp4_plane->pipe;
212 	const struct mdp_format *format;
213 	uint32_t op_mode = 0;
214 	uint32_t phasex_step = MDP4_VG_PHASE_STEP_DEFAULT;
215 	uint32_t phasey_step = MDP4_VG_PHASE_STEP_DEFAULT;
216 	enum mdp4_frame_format frame_type;
217 
218 	if (!(crtc && fb)) {
219 		DBG("%s: disabled!", mdp4_plane->name);
220 		return 0;
221 	}
222 
223 	frame_type = mdp4_get_frame_format(fb);
224 
225 	/* src values are in Q16 fixed point, convert to integer: */
226 	src_x = src_x >> 16;
227 	src_y = src_y >> 16;
228 	src_w = src_w >> 16;
229 	src_h = src_h >> 16;
230 
231 	DBG("%s: FB[%u] %u,%u,%u,%u -> CRTC[%u] %d,%d,%u,%u", mdp4_plane->name,
232 			fb->base.id, src_x, src_y, src_w, src_h,
233 			crtc->base.id, crtc_x, crtc_y, crtc_w, crtc_h);
234 
235 	format = to_mdp_format(msm_framebuffer_format(fb));
236 
237 	if (src_w > (crtc_w * DOWN_SCALE_MAX)) {
238 		dev_err(dev->dev, "Width down scaling exceeds limits!\n");
239 		return -ERANGE;
240 	}
241 
242 	if (src_h > (crtc_h * DOWN_SCALE_MAX)) {
243 		dev_err(dev->dev, "Height down scaling exceeds limits!\n");
244 		return -ERANGE;
245 	}
246 
247 	if (crtc_w > (src_w * UP_SCALE_MAX)) {
248 		dev_err(dev->dev, "Width up scaling exceeds limits!\n");
249 		return -ERANGE;
250 	}
251 
252 	if (crtc_h > (src_h * UP_SCALE_MAX)) {
253 		dev_err(dev->dev, "Height up scaling exceeds limits!\n");
254 		return -ERANGE;
255 	}
256 
257 	if (src_w != crtc_w) {
258 		uint32_t sel_unit = SCALE_FIR;
259 		op_mode |= MDP4_PIPE_OP_MODE_SCALEX_EN;
260 
261 		if (MDP_FORMAT_IS_YUV(format)) {
262 			if (crtc_w > src_w)
263 				sel_unit = SCALE_PIXEL_RPT;
264 			else if (crtc_w <= (src_w / 4))
265 				sel_unit = SCALE_MN_PHASE;
266 
267 			op_mode |= MDP4_PIPE_OP_MODE_SCALEX_UNIT_SEL(sel_unit);
268 			phasex_step = mult_frac(MDP4_VG_PHASE_STEP_DEFAULT,
269 					src_w, crtc_w);
270 		}
271 	}
272 
273 	if (src_h != crtc_h) {
274 		uint32_t sel_unit = SCALE_FIR;
275 		op_mode |= MDP4_PIPE_OP_MODE_SCALEY_EN;
276 
277 		if (MDP_FORMAT_IS_YUV(format)) {
278 
279 			if (crtc_h > src_h)
280 				sel_unit = SCALE_PIXEL_RPT;
281 			else if (crtc_h <= (src_h / 4))
282 				sel_unit = SCALE_MN_PHASE;
283 
284 			op_mode |= MDP4_PIPE_OP_MODE_SCALEY_UNIT_SEL(sel_unit);
285 			phasey_step = mult_frac(MDP4_VG_PHASE_STEP_DEFAULT,
286 					src_h, crtc_h);
287 		}
288 	}
289 
290 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_SIZE(pipe),
291 			MDP4_PIPE_SRC_SIZE_WIDTH(src_w) |
292 			MDP4_PIPE_SRC_SIZE_HEIGHT(src_h));
293 
294 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_XY(pipe),
295 			MDP4_PIPE_SRC_XY_X(src_x) |
296 			MDP4_PIPE_SRC_XY_Y(src_y));
297 
298 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_DST_SIZE(pipe),
299 			MDP4_PIPE_DST_SIZE_WIDTH(crtc_w) |
300 			MDP4_PIPE_DST_SIZE_HEIGHT(crtc_h));
301 
302 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_DST_XY(pipe),
303 			MDP4_PIPE_DST_XY_X(crtc_x) |
304 			MDP4_PIPE_DST_XY_Y(crtc_y));
305 
306 	mdp4_plane_set_scanout(plane, fb);
307 
308 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_FORMAT(pipe),
309 			MDP4_PIPE_SRC_FORMAT_A_BPC(format->bpc_a) |
310 			MDP4_PIPE_SRC_FORMAT_R_BPC(format->bpc_r) |
311 			MDP4_PIPE_SRC_FORMAT_G_BPC(format->bpc_g) |
312 			MDP4_PIPE_SRC_FORMAT_B_BPC(format->bpc_b) |
313 			COND(format->alpha_enable, MDP4_PIPE_SRC_FORMAT_ALPHA_ENABLE) |
314 			MDP4_PIPE_SRC_FORMAT_CPP(format->cpp - 1) |
315 			MDP4_PIPE_SRC_FORMAT_UNPACK_COUNT(format->unpack_count - 1) |
316 			MDP4_PIPE_SRC_FORMAT_FETCH_PLANES(format->fetch_type) |
317 			MDP4_PIPE_SRC_FORMAT_CHROMA_SAMP(format->chroma_sample) |
318 			MDP4_PIPE_SRC_FORMAT_FRAME_FORMAT(frame_type) |
319 			COND(format->unpack_tight, MDP4_PIPE_SRC_FORMAT_UNPACK_TIGHT));
320 
321 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_SRC_UNPACK(pipe),
322 			MDP4_PIPE_SRC_UNPACK_ELEM0(format->unpack[0]) |
323 			MDP4_PIPE_SRC_UNPACK_ELEM1(format->unpack[1]) |
324 			MDP4_PIPE_SRC_UNPACK_ELEM2(format->unpack[2]) |
325 			MDP4_PIPE_SRC_UNPACK_ELEM3(format->unpack[3]));
326 
327 	if (MDP_FORMAT_IS_YUV(format)) {
328 		struct csc_cfg *csc = mdp_get_default_csc_cfg(CSC_YUV2RGB);
329 
330 		op_mode |= MDP4_PIPE_OP_MODE_SRC_YCBCR;
331 		op_mode |= MDP4_PIPE_OP_MODE_CSC_EN;
332 		mdp4_write_csc_config(mdp4_kms, pipe, csc);
333 	}
334 
335 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(pipe), op_mode);
336 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_PHASEX_STEP(pipe), phasex_step);
337 	mdp4_write(mdp4_kms, REG_MDP4_PIPE_PHASEY_STEP(pipe), phasey_step);
338 
339 	if (frame_type != FRAME_LINEAR)
340 		mdp4_write(mdp4_kms, REG_MDP4_PIPE_SSTILE_FRAME_SIZE(pipe),
341 				MDP4_PIPE_SSTILE_FRAME_SIZE_WIDTH(src_w) |
342 				MDP4_PIPE_SSTILE_FRAME_SIZE_HEIGHT(src_h));
343 
344 	return 0;
345 }
346 
347 static const char *pipe_names[] = {
348 		"VG1", "VG2",
349 		"RGB1", "RGB2", "RGB3",
350 		"VG3", "VG4",
351 };
352 
353 enum mdp4_pipe mdp4_plane_pipe(struct drm_plane *plane)
354 {
355 	struct mdp4_plane *mdp4_plane = to_mdp4_plane(plane);
356 	return mdp4_plane->pipe;
357 }
358 
359 /* initialize plane */
360 struct drm_plane *mdp4_plane_init(struct drm_device *dev,
361 		enum mdp4_pipe pipe_id, bool private_plane)
362 {
363 	struct drm_plane *plane = NULL;
364 	struct mdp4_plane *mdp4_plane;
365 	int ret;
366 	enum drm_plane_type type;
367 
368 	mdp4_plane = kzalloc(sizeof(*mdp4_plane), GFP_KERNEL);
369 	if (!mdp4_plane) {
370 		ret = -ENOMEM;
371 		goto fail;
372 	}
373 
374 	plane = &mdp4_plane->base;
375 
376 	mdp4_plane->pipe = pipe_id;
377 	mdp4_plane->name = pipe_names[pipe_id];
378 	mdp4_plane->caps = mdp4_pipe_caps(pipe_id);
379 
380 	mdp4_plane->nformats = mdp_get_formats(mdp4_plane->formats,
381 			ARRAY_SIZE(mdp4_plane->formats),
382 			!pipe_supports_yuv(mdp4_plane->caps));
383 
384 	type = private_plane ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
385 	ret = drm_universal_plane_init(dev, plane, 0xff, &mdp4_plane_funcs,
386 				 mdp4_plane->formats, mdp4_plane->nformats,
387 				 NULL, type, NULL);
388 	if (ret)
389 		goto fail;
390 
391 	drm_plane_helper_add(plane, &mdp4_plane_helper_funcs);
392 
393 	mdp4_plane_install_properties(plane, &plane->base);
394 
395 	return plane;
396 
397 fail:
398 	if (plane)
399 		mdp4_plane_destroy(plane);
400 
401 	return ERR_PTR(ret);
402 }
403