1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright (C) Icenowy Zheng <icenowy@aosc.io>
4  *
5  * Based on sun4i_layer.h, which is:
6  *   Copyright (C) 2015 Free Electrons
7  *   Copyright (C) 2015 NextThing Co
8  *
9  *   Maxime Ripard <maxime.ripard@free-electrons.com>
10  */
11 
12 #include <drm/drm_atomic.h>
13 #include <drm/drm_atomic_helper.h>
14 #include <drm/drm_crtc.h>
15 #include <drm/drm_fb_cma_helper.h>
16 #include <drm/drm_fourcc.h>
17 #include <drm/drm_gem_cma_helper.h>
18 #include <drm/drm_gem_framebuffer_helper.h>
19 #include <drm/drm_plane_helper.h>
20 #include <drm/drm_probe_helper.h>
21 
22 #include "sun8i_mixer.h"
23 #include "sun8i_ui_layer.h"
24 #include "sun8i_ui_scaler.h"
25 
26 static void sun8i_ui_layer_enable(struct sun8i_mixer *mixer, int channel,
27 				  int overlay, bool enable, unsigned int zpos,
28 				  unsigned int old_zpos)
29 {
30 	u32 val, bld_base, ch_base;
31 
32 	bld_base = sun8i_blender_base(mixer);
33 	ch_base = sun8i_channel_base(mixer, channel);
34 
35 	DRM_DEBUG_DRIVER("%sabling channel %d overlay %d\n",
36 			 enable ? "En" : "Dis", channel, overlay);
37 
38 	if (enable)
39 		val = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN;
40 	else
41 		val = 0;
42 
43 	regmap_update_bits(mixer->engine.regs,
44 			   SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, overlay),
45 			   SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN, val);
46 
47 	if (!enable || zpos != old_zpos) {
48 		regmap_update_bits(mixer->engine.regs,
49 				   SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
50 				   SUN8I_MIXER_BLEND_PIPE_CTL_EN(old_zpos),
51 				   0);
52 
53 		regmap_update_bits(mixer->engine.regs,
54 				   SUN8I_MIXER_BLEND_ROUTE(bld_base),
55 				   SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(old_zpos),
56 				   0);
57 	}
58 
59 	if (enable) {
60 		val = SUN8I_MIXER_BLEND_PIPE_CTL_EN(zpos);
61 
62 		regmap_update_bits(mixer->engine.regs,
63 				   SUN8I_MIXER_BLEND_PIPE_CTL(bld_base),
64 				   val, val);
65 
66 		val = channel << SUN8I_MIXER_BLEND_ROUTE_PIPE_SHIFT(zpos);
67 
68 		regmap_update_bits(mixer->engine.regs,
69 				   SUN8I_MIXER_BLEND_ROUTE(bld_base),
70 				   SUN8I_MIXER_BLEND_ROUTE_PIPE_MSK(zpos),
71 				   val);
72 	}
73 }
74 
75 static int sun8i_ui_layer_update_coord(struct sun8i_mixer *mixer, int channel,
76 				       int overlay, struct drm_plane *plane,
77 				       unsigned int zpos)
78 {
79 	struct drm_plane_state *state = plane->state;
80 	u32 src_w, src_h, dst_w, dst_h;
81 	u32 bld_base, ch_base;
82 	u32 outsize, insize;
83 	u32 hphase, vphase;
84 
85 	DRM_DEBUG_DRIVER("Updating UI channel %d overlay %d\n",
86 			 channel, overlay);
87 
88 	bld_base = sun8i_blender_base(mixer);
89 	ch_base = sun8i_channel_base(mixer, channel);
90 
91 	src_w = drm_rect_width(&state->src) >> 16;
92 	src_h = drm_rect_height(&state->src) >> 16;
93 	dst_w = drm_rect_width(&state->dst);
94 	dst_h = drm_rect_height(&state->dst);
95 
96 	hphase = state->src.x1 & 0xffff;
97 	vphase = state->src.y1 & 0xffff;
98 
99 	insize = SUN8I_MIXER_SIZE(src_w, src_h);
100 	outsize = SUN8I_MIXER_SIZE(dst_w, dst_h);
101 
102 	if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
103 		bool interlaced = false;
104 		u32 val;
105 
106 		DRM_DEBUG_DRIVER("Primary layer, updating global size W: %u H: %u\n",
107 				 dst_w, dst_h);
108 		regmap_write(mixer->engine.regs,
109 			     SUN8I_MIXER_GLOBAL_SIZE,
110 			     outsize);
111 		regmap_write(mixer->engine.regs,
112 			     SUN8I_MIXER_BLEND_OUTSIZE(bld_base), outsize);
113 
114 		if (state->crtc)
115 			interlaced = state->crtc->state->adjusted_mode.flags
116 				& DRM_MODE_FLAG_INTERLACE;
117 
118 		if (interlaced)
119 			val = SUN8I_MIXER_BLEND_OUTCTL_INTERLACED;
120 		else
121 			val = 0;
122 
123 		regmap_update_bits(mixer->engine.regs,
124 				   SUN8I_MIXER_BLEND_OUTCTL(bld_base),
125 				   SUN8I_MIXER_BLEND_OUTCTL_INTERLACED,
126 				   val);
127 
128 		DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
129 				 interlaced ? "on" : "off");
130 	}
131 
132 	/* Set height and width */
133 	DRM_DEBUG_DRIVER("Layer source offset X: %d Y: %d\n",
134 			 state->src.x1 >> 16, state->src.y1 >> 16);
135 	DRM_DEBUG_DRIVER("Layer source size W: %d H: %d\n", src_w, src_h);
136 	regmap_write(mixer->engine.regs,
137 		     SUN8I_MIXER_CHAN_UI_LAYER_SIZE(ch_base, overlay),
138 		     insize);
139 	regmap_write(mixer->engine.regs,
140 		     SUN8I_MIXER_CHAN_UI_OVL_SIZE(ch_base),
141 		     insize);
142 
143 	if (insize != outsize || hphase || vphase) {
144 		u32 hscale, vscale;
145 
146 		DRM_DEBUG_DRIVER("HW scaling is enabled\n");
147 
148 		hscale = state->src_w / state->crtc_w;
149 		vscale = state->src_h / state->crtc_h;
150 
151 		sun8i_ui_scaler_setup(mixer, channel, src_w, src_h, dst_w,
152 				      dst_h, hscale, vscale, hphase, vphase);
153 		sun8i_ui_scaler_enable(mixer, channel, true);
154 	} else {
155 		DRM_DEBUG_DRIVER("HW scaling is not needed\n");
156 		sun8i_ui_scaler_enable(mixer, channel, false);
157 	}
158 
159 	/* Set base coordinates */
160 	DRM_DEBUG_DRIVER("Layer destination coordinates X: %d Y: %d\n",
161 			 state->dst.x1, state->dst.y1);
162 	DRM_DEBUG_DRIVER("Layer destination size W: %d H: %d\n", dst_w, dst_h);
163 	regmap_write(mixer->engine.regs,
164 		     SUN8I_MIXER_BLEND_ATTR_COORD(bld_base, zpos),
165 		     SUN8I_MIXER_COORD(state->dst.x1, state->dst.y1));
166 	regmap_write(mixer->engine.regs,
167 		     SUN8I_MIXER_BLEND_ATTR_INSIZE(bld_base, zpos),
168 		     outsize);
169 
170 	return 0;
171 }
172 
173 static int sun8i_ui_layer_update_formats(struct sun8i_mixer *mixer, int channel,
174 					 int overlay, struct drm_plane *plane)
175 {
176 	struct drm_plane_state *state = plane->state;
177 	const struct drm_format_info *fmt;
178 	u32 val, ch_base, hw_fmt;
179 	int ret;
180 
181 	ch_base = sun8i_channel_base(mixer, channel);
182 
183 	fmt = state->fb->format;
184 	ret = sun8i_mixer_drm_format_to_hw(fmt->format, &hw_fmt);
185 	if (ret || fmt->is_yuv) {
186 		DRM_DEBUG_DRIVER("Invalid format\n");
187 		return -EINVAL;
188 	}
189 
190 	val = hw_fmt << SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_OFFSET;
191 	regmap_update_bits(mixer->engine.regs,
192 			   SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, overlay),
193 			   SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_MASK, val);
194 
195 	return 0;
196 }
197 
198 static int sun8i_ui_layer_update_buffer(struct sun8i_mixer *mixer, int channel,
199 					int overlay, struct drm_plane *plane)
200 {
201 	struct drm_plane_state *state = plane->state;
202 	struct drm_framebuffer *fb = state->fb;
203 	struct drm_gem_cma_object *gem;
204 	dma_addr_t paddr;
205 	u32 ch_base;
206 	int bpp;
207 
208 	ch_base = sun8i_channel_base(mixer, channel);
209 
210 	/* Get the physical address of the buffer in memory */
211 	gem = drm_fb_cma_get_gem_obj(fb, 0);
212 
213 	DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->paddr);
214 
215 	/* Compute the start of the displayed memory */
216 	bpp = fb->format->cpp[0];
217 	paddr = gem->paddr + fb->offsets[0];
218 
219 	/* Fixup framebuffer address for src coordinates */
220 	paddr += (state->src.x1 >> 16) * bpp;
221 	paddr += (state->src.y1 >> 16) * fb->pitches[0];
222 
223 	/* Set the line width */
224 	DRM_DEBUG_DRIVER("Layer line width: %d bytes\n", fb->pitches[0]);
225 	regmap_write(mixer->engine.regs,
226 		     SUN8I_MIXER_CHAN_UI_LAYER_PITCH(ch_base, overlay),
227 		     fb->pitches[0]);
228 
229 	DRM_DEBUG_DRIVER("Setting buffer address to %pad\n", &paddr);
230 
231 	regmap_write(mixer->engine.regs,
232 		     SUN8I_MIXER_CHAN_UI_LAYER_TOP_LADDR(ch_base, overlay),
233 		     lower_32_bits(paddr));
234 
235 	return 0;
236 }
237 
238 static int sun8i_ui_layer_atomic_check(struct drm_plane *plane,
239 				       struct drm_plane_state *state)
240 {
241 	struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane);
242 	struct drm_crtc *crtc = state->crtc;
243 	struct drm_crtc_state *crtc_state;
244 	int min_scale, max_scale;
245 
246 	if (!crtc)
247 		return 0;
248 
249 	crtc_state = drm_atomic_get_existing_crtc_state(state->state, crtc);
250 	if (WARN_ON(!crtc_state))
251 		return -EINVAL;
252 
253 	min_scale = DRM_PLANE_HELPER_NO_SCALING;
254 	max_scale = DRM_PLANE_HELPER_NO_SCALING;
255 
256 	if (layer->mixer->cfg->scaler_mask & BIT(layer->channel)) {
257 		min_scale = SUN8I_UI_SCALER_SCALE_MIN;
258 		max_scale = SUN8I_UI_SCALER_SCALE_MAX;
259 	}
260 
261 	return drm_atomic_helper_check_plane_state(state, crtc_state,
262 						   min_scale, max_scale,
263 						   true, true);
264 }
265 
266 static void sun8i_ui_layer_atomic_disable(struct drm_plane *plane,
267 					  struct drm_plane_state *old_state)
268 {
269 	struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane);
270 	unsigned int old_zpos = old_state->normalized_zpos;
271 	struct sun8i_mixer *mixer = layer->mixer;
272 
273 	sun8i_ui_layer_enable(mixer, layer->channel, layer->overlay, false, 0,
274 			      old_zpos);
275 }
276 
277 static void sun8i_ui_layer_atomic_update(struct drm_plane *plane,
278 					 struct drm_plane_state *old_state)
279 {
280 	struct sun8i_ui_layer *layer = plane_to_sun8i_ui_layer(plane);
281 	unsigned int zpos = plane->state->normalized_zpos;
282 	unsigned int old_zpos = old_state->normalized_zpos;
283 	struct sun8i_mixer *mixer = layer->mixer;
284 
285 	if (!plane->state->visible) {
286 		sun8i_ui_layer_enable(mixer, layer->channel,
287 				      layer->overlay, false, 0, old_zpos);
288 		return;
289 	}
290 
291 	sun8i_ui_layer_update_coord(mixer, layer->channel,
292 				    layer->overlay, plane, zpos);
293 	sun8i_ui_layer_update_formats(mixer, layer->channel,
294 				      layer->overlay, plane);
295 	sun8i_ui_layer_update_buffer(mixer, layer->channel,
296 				     layer->overlay, plane);
297 	sun8i_ui_layer_enable(mixer, layer->channel, layer->overlay,
298 			      true, zpos, old_zpos);
299 }
300 
301 static struct drm_plane_helper_funcs sun8i_ui_layer_helper_funcs = {
302 	.prepare_fb	= drm_gem_fb_prepare_fb,
303 	.atomic_check	= sun8i_ui_layer_atomic_check,
304 	.atomic_disable	= sun8i_ui_layer_atomic_disable,
305 	.atomic_update	= sun8i_ui_layer_atomic_update,
306 };
307 
308 static const struct drm_plane_funcs sun8i_ui_layer_funcs = {
309 	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
310 	.atomic_duplicate_state	= drm_atomic_helper_plane_duplicate_state,
311 	.destroy		= drm_plane_cleanup,
312 	.disable_plane		= drm_atomic_helper_disable_plane,
313 	.reset			= drm_atomic_helper_plane_reset,
314 	.update_plane		= drm_atomic_helper_update_plane,
315 };
316 
317 static const u32 sun8i_ui_layer_formats[] = {
318 	DRM_FORMAT_ABGR1555,
319 	DRM_FORMAT_ABGR4444,
320 	DRM_FORMAT_ABGR8888,
321 	DRM_FORMAT_ARGB1555,
322 	DRM_FORMAT_ARGB4444,
323 	DRM_FORMAT_ARGB8888,
324 	DRM_FORMAT_BGR565,
325 	DRM_FORMAT_BGR888,
326 	DRM_FORMAT_BGRA5551,
327 	DRM_FORMAT_BGRA4444,
328 	DRM_FORMAT_BGRA8888,
329 	DRM_FORMAT_BGRX8888,
330 	DRM_FORMAT_RGB565,
331 	DRM_FORMAT_RGB888,
332 	DRM_FORMAT_RGBA4444,
333 	DRM_FORMAT_RGBA5551,
334 	DRM_FORMAT_RGBA8888,
335 	DRM_FORMAT_RGBX8888,
336 	DRM_FORMAT_XBGR8888,
337 	DRM_FORMAT_XRGB8888,
338 };
339 
340 struct sun8i_ui_layer *sun8i_ui_layer_init_one(struct drm_device *drm,
341 					       struct sun8i_mixer *mixer,
342 					       int index)
343 {
344 	enum drm_plane_type type = DRM_PLANE_TYPE_OVERLAY;
345 	int channel = mixer->cfg->vi_num + index;
346 	struct sun8i_ui_layer *layer;
347 	unsigned int plane_cnt;
348 	int ret;
349 
350 	layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
351 	if (!layer)
352 		return ERR_PTR(-ENOMEM);
353 
354 	if (index == 0)
355 		type = DRM_PLANE_TYPE_PRIMARY;
356 
357 	/* possible crtcs are set later */
358 	ret = drm_universal_plane_init(drm, &layer->plane, 0,
359 				       &sun8i_ui_layer_funcs,
360 				       sun8i_ui_layer_formats,
361 				       ARRAY_SIZE(sun8i_ui_layer_formats),
362 				       NULL, type, NULL);
363 	if (ret) {
364 		dev_err(drm->dev, "Couldn't initialize layer\n");
365 		return ERR_PTR(ret);
366 	}
367 
368 	plane_cnt = mixer->cfg->ui_num + mixer->cfg->vi_num;
369 
370 	ret = drm_plane_create_zpos_property(&layer->plane, channel,
371 					     0, plane_cnt - 1);
372 	if (ret) {
373 		dev_err(drm->dev, "Couldn't add zpos property\n");
374 		return ERR_PTR(ret);
375 	}
376 
377 	drm_plane_helper_add(&layer->plane, &sun8i_ui_layer_helper_funcs);
378 	layer->mixer = mixer;
379 	layer->channel = channel;
380 	layer->overlay = 0;
381 
382 	return layer;
383 }
384