1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * RZ/G2L Display Unit VSP-Based Compositor
4 *
5 * Copyright (C) 2023 Renesas Electronics Corporation
6 *
7 * Based on rcar_du_vsp.c
8 */
9
10 #include <drm/drm_atomic.h>
11 #include <drm/drm_atomic_helper.h>
12 #include <drm/drm_blend.h>
13 #include <drm/drm_crtc.h>
14 #include <drm/drm_fb_dma_helper.h>
15 #include <drm/drm_fourcc.h>
16 #include <drm/drm_framebuffer.h>
17 #include <drm/drm_gem_atomic_helper.h>
18 #include <drm/drm_gem_dma_helper.h>
19 #include <drm/drm_managed.h>
20 #include <drm/drm_vblank.h>
21
22 #include <linux/bitops.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/of_platform.h>
25 #include <linux/platform_device.h>
26 #include <linux/scatterlist.h>
27
28 #include <media/vsp1.h>
29
30 #include "rzg2l_du_drv.h"
31 #include "rzg2l_du_kms.h"
32 #include "rzg2l_du_vsp.h"
33
rzg2l_du_vsp_complete(void * private,unsigned int status,u32 crc)34 static void rzg2l_du_vsp_complete(void *private, unsigned int status, u32 crc)
35 {
36 struct rzg2l_du_crtc *crtc = private;
37
38 if (crtc->vblank_enable)
39 drm_crtc_handle_vblank(&crtc->crtc);
40
41 if (status & VSP1_DU_STATUS_COMPLETE)
42 rzg2l_du_crtc_finish_page_flip(crtc);
43
44 drm_crtc_add_crc_entry(&crtc->crtc, false, 0, &crc);
45 }
46
rzg2l_du_vsp_enable(struct rzg2l_du_crtc * crtc)47 void rzg2l_du_vsp_enable(struct rzg2l_du_crtc *crtc)
48 {
49 const struct drm_display_mode *mode = &crtc->crtc.state->adjusted_mode;
50 struct vsp1_du_lif_config cfg = {
51 .width = mode->hdisplay,
52 .height = mode->vdisplay,
53 .interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE,
54 .callback = rzg2l_du_vsp_complete,
55 .callback_data = crtc,
56 };
57
58 vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
59 }
60
rzg2l_du_vsp_disable(struct rzg2l_du_crtc * crtc)61 void rzg2l_du_vsp_disable(struct rzg2l_du_crtc *crtc)
62 {
63 vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, NULL);
64 }
65
rzg2l_du_vsp_atomic_flush(struct rzg2l_du_crtc * crtc)66 void rzg2l_du_vsp_atomic_flush(struct rzg2l_du_crtc *crtc)
67 {
68 struct vsp1_du_atomic_pipe_config cfg = { { 0, } };
69
70 vsp1_du_atomic_flush(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
71 }
72
rzg2l_du_vsp_get_drm_plane(struct rzg2l_du_crtc * crtc,unsigned int pipe_index)73 struct drm_plane *rzg2l_du_vsp_get_drm_plane(struct rzg2l_du_crtc *crtc,
74 unsigned int pipe_index)
75 {
76 struct rzg2l_du_device *rcdu = crtc->vsp->dev;
77 struct drm_plane *plane = NULL;
78
79 drm_for_each_plane(plane, &rcdu->ddev) {
80 struct rzg2l_du_vsp_plane *vsp_plane = to_rzg2l_vsp_plane(plane);
81
82 if (vsp_plane->index == pipe_index)
83 break;
84 }
85
86 return plane ? plane : ERR_PTR(-EINVAL);
87 }
88
89 static const u32 rzg2l_du_vsp_formats[] = {
90 DRM_FORMAT_RGB332,
91 DRM_FORMAT_ARGB4444,
92 DRM_FORMAT_XRGB4444,
93 DRM_FORMAT_ARGB1555,
94 DRM_FORMAT_XRGB1555,
95 DRM_FORMAT_RGB565,
96 DRM_FORMAT_BGR888,
97 DRM_FORMAT_RGB888,
98 DRM_FORMAT_BGRA8888,
99 DRM_FORMAT_BGRX8888,
100 DRM_FORMAT_ARGB8888,
101 DRM_FORMAT_XRGB8888,
102 DRM_FORMAT_UYVY,
103 DRM_FORMAT_YUYV,
104 DRM_FORMAT_YVYU,
105 DRM_FORMAT_NV12,
106 DRM_FORMAT_NV21,
107 DRM_FORMAT_NV16,
108 DRM_FORMAT_NV61,
109 DRM_FORMAT_YUV420,
110 DRM_FORMAT_YVU420,
111 DRM_FORMAT_YUV422,
112 DRM_FORMAT_YVU422,
113 DRM_FORMAT_YUV444,
114 DRM_FORMAT_YVU444,
115 };
116
rzg2l_du_vsp_plane_setup(struct rzg2l_du_vsp_plane * plane)117 static void rzg2l_du_vsp_plane_setup(struct rzg2l_du_vsp_plane *plane)
118 {
119 struct rzg2l_du_vsp_plane_state *state =
120 to_rzg2l_vsp_plane_state(plane->plane.state);
121 struct rzg2l_du_crtc *crtc = to_rzg2l_crtc(state->state.crtc);
122 struct drm_framebuffer *fb = plane->plane.state->fb;
123 const struct rzg2l_du_format_info *format;
124 struct vsp1_du_atomic_config cfg = {
125 .pixelformat = 0,
126 .pitch = fb->pitches[0],
127 .alpha = state->state.alpha >> 8,
128 .zpos = state->state.zpos,
129 };
130 u32 fourcc = state->format->fourcc;
131 unsigned int i;
132
133 cfg.src.left = state->state.src.x1 >> 16;
134 cfg.src.top = state->state.src.y1 >> 16;
135 cfg.src.width = drm_rect_width(&state->state.src) >> 16;
136 cfg.src.height = drm_rect_height(&state->state.src) >> 16;
137
138 cfg.dst.left = state->state.dst.x1;
139 cfg.dst.top = state->state.dst.y1;
140 cfg.dst.width = drm_rect_width(&state->state.dst);
141 cfg.dst.height = drm_rect_height(&state->state.dst);
142
143 for (i = 0; i < state->format->planes; ++i) {
144 struct drm_gem_dma_object *gem;
145
146 gem = drm_fb_dma_get_gem_obj(fb, i);
147 cfg.mem[i] = gem->dma_addr + fb->offsets[i];
148 }
149
150 if (state->state.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE) {
151 switch (fourcc) {
152 case DRM_FORMAT_ARGB1555:
153 fourcc = DRM_FORMAT_XRGB1555;
154 break;
155
156 case DRM_FORMAT_ARGB4444:
157 fourcc = DRM_FORMAT_XRGB4444;
158 break;
159
160 case DRM_FORMAT_ARGB8888:
161 fourcc = DRM_FORMAT_XRGB8888;
162 break;
163 }
164 }
165
166 format = rzg2l_du_format_info(fourcc);
167 cfg.pixelformat = format->v4l2;
168
169 cfg.premult = state->state.pixel_blend_mode == DRM_MODE_BLEND_PREMULTI;
170
171 vsp1_du_atomic_update(plane->vsp->vsp, crtc->vsp_pipe,
172 plane->index, &cfg);
173 }
174
__rzg2l_du_vsp_plane_atomic_check(struct drm_plane * plane,struct drm_plane_state * state,const struct rzg2l_du_format_info ** format)175 static int __rzg2l_du_vsp_plane_atomic_check(struct drm_plane *plane,
176 struct drm_plane_state *state,
177 const struct rzg2l_du_format_info **format)
178 {
179 struct drm_crtc_state *crtc_state;
180 int ret;
181
182 if (!state->crtc) {
183 /*
184 * The visible field is not reset by the DRM core but only
185 * updated by drm_atomic_helper_check_plane_state, set it
186 * manually.
187 */
188 state->visible = false;
189 *format = NULL;
190 return 0;
191 }
192
193 crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
194 if (IS_ERR(crtc_state))
195 return PTR_ERR(crtc_state);
196
197 ret = drm_atomic_helper_check_plane_state(state, crtc_state,
198 DRM_PLANE_NO_SCALING,
199 DRM_PLANE_NO_SCALING,
200 true, true);
201 if (ret < 0)
202 return ret;
203
204 if (!state->visible) {
205 *format = NULL;
206 return 0;
207 }
208
209 *format = rzg2l_du_format_info(state->fb->format->format);
210
211 return 0;
212 }
213
rzg2l_du_vsp_plane_atomic_check(struct drm_plane * plane,struct drm_atomic_state * state)214 static int rzg2l_du_vsp_plane_atomic_check(struct drm_plane *plane,
215 struct drm_atomic_state *state)
216 {
217 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
218 plane);
219 struct rzg2l_du_vsp_plane_state *rstate = to_rzg2l_vsp_plane_state(new_plane_state);
220
221 return __rzg2l_du_vsp_plane_atomic_check(plane, new_plane_state, &rstate->format);
222 }
223
rzg2l_du_vsp_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)224 static void rzg2l_du_vsp_plane_atomic_update(struct drm_plane *plane,
225 struct drm_atomic_state *state)
226 {
227 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
228 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
229 struct rzg2l_du_vsp_plane *rplane = to_rzg2l_vsp_plane(plane);
230 struct rzg2l_du_crtc *crtc = to_rzg2l_crtc(old_state->crtc);
231
232 if (new_state->visible)
233 rzg2l_du_vsp_plane_setup(rplane);
234 else if (old_state->crtc)
235 vsp1_du_atomic_update(rplane->vsp->vsp, crtc->vsp_pipe,
236 rplane->index, NULL);
237 }
238
239 static const struct drm_plane_helper_funcs rzg2l_du_vsp_plane_helper_funcs = {
240 .atomic_check = rzg2l_du_vsp_plane_atomic_check,
241 .atomic_update = rzg2l_du_vsp_plane_atomic_update,
242 };
243
244 static struct drm_plane_state *
rzg2l_du_vsp_plane_atomic_duplicate_state(struct drm_plane * plane)245 rzg2l_du_vsp_plane_atomic_duplicate_state(struct drm_plane *plane)
246 {
247 struct rzg2l_du_vsp_plane_state *copy;
248
249 if (WARN_ON(!plane->state))
250 return NULL;
251
252 copy = kzalloc(sizeof(*copy), GFP_KERNEL);
253 if (!copy)
254 return NULL;
255
256 __drm_atomic_helper_plane_duplicate_state(plane, ©->state);
257
258 return ©->state;
259 }
260
rzg2l_du_vsp_plane_atomic_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)261 static void rzg2l_du_vsp_plane_atomic_destroy_state(struct drm_plane *plane,
262 struct drm_plane_state *state)
263 {
264 __drm_atomic_helper_plane_destroy_state(state);
265 kfree(to_rzg2l_vsp_plane_state(state));
266 }
267
rzg2l_du_vsp_plane_reset(struct drm_plane * plane)268 static void rzg2l_du_vsp_plane_reset(struct drm_plane *plane)
269 {
270 struct rzg2l_du_vsp_plane_state *state;
271
272 if (plane->state) {
273 rzg2l_du_vsp_plane_atomic_destroy_state(plane, plane->state);
274 plane->state = NULL;
275 }
276
277 state = kzalloc(sizeof(*state), GFP_KERNEL);
278 if (!state)
279 return;
280
281 __drm_atomic_helper_plane_reset(plane, &state->state);
282 }
283
284 static const struct drm_plane_funcs rzg2l_du_vsp_plane_funcs = {
285 .update_plane = drm_atomic_helper_update_plane,
286 .disable_plane = drm_atomic_helper_disable_plane,
287 .reset = rzg2l_du_vsp_plane_reset,
288 .atomic_duplicate_state = rzg2l_du_vsp_plane_atomic_duplicate_state,
289 .atomic_destroy_state = rzg2l_du_vsp_plane_atomic_destroy_state,
290 };
291
rzg2l_du_vsp_cleanup(struct drm_device * dev,void * res)292 static void rzg2l_du_vsp_cleanup(struct drm_device *dev, void *res)
293 {
294 struct rzg2l_du_vsp *vsp = res;
295
296 put_device(vsp->vsp);
297 }
298
rzg2l_du_vsp_init(struct rzg2l_du_vsp * vsp,struct device_node * np,unsigned int crtcs)299 int rzg2l_du_vsp_init(struct rzg2l_du_vsp *vsp, struct device_node *np,
300 unsigned int crtcs)
301 {
302 struct rzg2l_du_device *rcdu = vsp->dev;
303 struct platform_device *pdev;
304 unsigned int num_crtcs = hweight32(crtcs);
305 unsigned int num_planes = 2;
306 unsigned int i;
307 int ret;
308
309 /* Find the VSP device and initialize it. */
310 pdev = of_find_device_by_node(np);
311 if (!pdev)
312 return -ENXIO;
313
314 vsp->vsp = &pdev->dev;
315
316 ret = drmm_add_action_or_reset(&rcdu->ddev, rzg2l_du_vsp_cleanup, vsp);
317 if (ret < 0)
318 return ret;
319
320 ret = vsp1_du_init(vsp->vsp);
321 if (ret < 0)
322 return ret;
323
324 for (i = 0; i < num_planes; ++i) {
325 enum drm_plane_type type = i < num_crtcs
326 ? DRM_PLANE_TYPE_PRIMARY
327 : DRM_PLANE_TYPE_OVERLAY;
328 struct rzg2l_du_vsp_plane *plane;
329
330 plane = drmm_universal_plane_alloc(&rcdu->ddev, struct rzg2l_du_vsp_plane,
331 plane, crtcs, &rzg2l_du_vsp_plane_funcs,
332 rzg2l_du_vsp_formats,
333 ARRAY_SIZE(rzg2l_du_vsp_formats),
334 NULL, type, NULL);
335 if (IS_ERR(plane))
336 return PTR_ERR(plane);
337
338 plane->vsp = vsp;
339 plane->index = i;
340
341 drm_plane_helper_add(&plane->plane,
342 &rzg2l_du_vsp_plane_helper_funcs);
343 }
344
345 return 0;
346 }
347