1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
5 */
6
7 #include <drm/drm_atomic.h>
8 #include <drm/drm_atomic_helper.h>
9 #include <drm/drm_blend.h>
10 #include <drm/drm_crtc.h>
11 #include <drm/drm_fb_dma_helper.h>
12 #include <drm/drm_fourcc.h>
13 #include <drm/drm_framebuffer.h>
14 #include <drm/drm_gem_atomic_helper.h>
15
16 #include "tidss_crtc.h"
17 #include "tidss_dispc.h"
18 #include "tidss_drv.h"
19 #include "tidss_plane.h"
20
tidss_plane_error_irq(struct drm_plane * plane,u64 irqstatus)21 void tidss_plane_error_irq(struct drm_plane *plane, u64 irqstatus)
22 {
23 struct tidss_plane *tplane = to_tidss_plane(plane);
24
25 dev_err_ratelimited(plane->dev->dev, "Plane%u underflow (irq %llx)\n",
26 tplane->hw_plane_id, irqstatus);
27 }
28
29 /* drm_plane_helper_funcs */
30
tidss_plane_atomic_check(struct drm_plane * plane,struct drm_atomic_state * state)31 static int tidss_plane_atomic_check(struct drm_plane *plane,
32 struct drm_atomic_state *state)
33 {
34 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
35 plane);
36 struct drm_device *ddev = plane->dev;
37 struct tidss_device *tidss = to_tidss(ddev);
38 struct tidss_plane *tplane = to_tidss_plane(plane);
39 const struct drm_format_info *finfo;
40 struct drm_crtc_state *crtc_state;
41 u32 hw_plane = tplane->hw_plane_id;
42 u32 hw_videoport;
43 int ret;
44
45 if (!new_plane_state->crtc) {
46 /*
47 * The visible field is not reset by the DRM core but only
48 * updated by drm_atomic_helper_check_plane_state(), set it
49 * manually.
50 */
51 new_plane_state->visible = false;
52 return 0;
53 }
54
55 crtc_state = drm_atomic_get_crtc_state(state,
56 new_plane_state->crtc);
57 if (IS_ERR(crtc_state))
58 return PTR_ERR(crtc_state);
59
60 ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
61 0,
62 INT_MAX, true, true);
63 if (ret < 0)
64 return ret;
65
66 /*
67 * The HW is only able to start drawing at subpixel boundary
68 * (the two first checks below). At the end of a row the HW
69 * can only jump integer number of subpixels forward to the
70 * beginning of the next row. So we can only show picture with
71 * integer subpixel width (the third check). However, after
72 * reaching the end of the drawn picture the drawing starts
73 * again at the absolute memory address where top left corner
74 * position of the drawn picture is (so there is no need to
75 * check for odd height).
76 */
77
78 finfo = drm_format_info(new_plane_state->fb->format->format);
79
80 if ((new_plane_state->src_x >> 16) % finfo->hsub != 0) {
81 dev_dbg(ddev->dev,
82 "%s: x-position %u not divisible subpixel size %u\n",
83 __func__, (new_plane_state->src_x >> 16), finfo->hsub);
84 return -EINVAL;
85 }
86
87 if ((new_plane_state->src_y >> 16) % finfo->vsub != 0) {
88 dev_dbg(ddev->dev,
89 "%s: y-position %u not divisible subpixel size %u\n",
90 __func__, (new_plane_state->src_y >> 16), finfo->vsub);
91 return -EINVAL;
92 }
93
94 if ((new_plane_state->src_w >> 16) % finfo->hsub != 0) {
95 dev_dbg(ddev->dev,
96 "%s: src width %u not divisible by subpixel size %u\n",
97 __func__, (new_plane_state->src_w >> 16),
98 finfo->hsub);
99 return -EINVAL;
100 }
101
102 if (!new_plane_state->visible)
103 return 0;
104
105 hw_videoport = to_tidss_crtc(new_plane_state->crtc)->hw_videoport;
106
107 ret = dispc_plane_check(tidss->dispc, hw_plane, new_plane_state,
108 hw_videoport);
109 if (ret)
110 return ret;
111
112 return 0;
113 }
114
tidss_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)115 static void tidss_plane_atomic_update(struct drm_plane *plane,
116 struct drm_atomic_state *state)
117 {
118 struct drm_device *ddev = plane->dev;
119 struct tidss_device *tidss = to_tidss(ddev);
120 struct tidss_plane *tplane = to_tidss_plane(plane);
121 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
122 plane);
123 u32 hw_videoport;
124
125 if (!new_state->visible) {
126 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
127 return;
128 }
129
130 hw_videoport = to_tidss_crtc(new_state->crtc)->hw_videoport;
131
132 dispc_plane_setup(tidss->dispc, tplane->hw_plane_id, new_state, hw_videoport);
133 }
134
tidss_plane_atomic_enable(struct drm_plane * plane,struct drm_atomic_state * state)135 static void tidss_plane_atomic_enable(struct drm_plane *plane,
136 struct drm_atomic_state *state)
137 {
138 struct drm_device *ddev = plane->dev;
139 struct tidss_device *tidss = to_tidss(ddev);
140 struct tidss_plane *tplane = to_tidss_plane(plane);
141
142 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, true);
143 }
144
tidss_plane_atomic_disable(struct drm_plane * plane,struct drm_atomic_state * state)145 static void tidss_plane_atomic_disable(struct drm_plane *plane,
146 struct drm_atomic_state *state)
147 {
148 struct drm_device *ddev = plane->dev;
149 struct tidss_device *tidss = to_tidss(ddev);
150 struct tidss_plane *tplane = to_tidss_plane(plane);
151
152 dispc_plane_enable(tidss->dispc, tplane->hw_plane_id, false);
153 }
154
drm_plane_destroy(struct drm_plane * plane)155 static void drm_plane_destroy(struct drm_plane *plane)
156 {
157 struct tidss_plane *tplane = to_tidss_plane(plane);
158
159 drm_plane_cleanup(plane);
160 kfree(tplane);
161 }
162
163 static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = {
164 .atomic_check = tidss_plane_atomic_check,
165 .atomic_update = tidss_plane_atomic_update,
166 .atomic_enable = tidss_plane_atomic_enable,
167 .atomic_disable = tidss_plane_atomic_disable,
168 };
169
170 static const struct drm_plane_helper_funcs tidss_primary_plane_helper_funcs = {
171 .atomic_check = tidss_plane_atomic_check,
172 .atomic_update = tidss_plane_atomic_update,
173 .atomic_enable = tidss_plane_atomic_enable,
174 .atomic_disable = tidss_plane_atomic_disable,
175 .get_scanout_buffer = drm_fb_dma_get_scanout_buffer,
176 };
177
178 static const struct drm_plane_funcs tidss_plane_funcs = {
179 .update_plane = drm_atomic_helper_update_plane,
180 .disable_plane = drm_atomic_helper_disable_plane,
181 .reset = drm_atomic_helper_plane_reset,
182 .destroy = drm_plane_destroy,
183 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
184 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
185 };
186
tidss_plane_create(struct tidss_device * tidss,u32 hw_plane_id,u32 plane_type,u32 crtc_mask,const u32 * formats,u32 num_formats)187 struct tidss_plane *tidss_plane_create(struct tidss_device *tidss,
188 u32 hw_plane_id, u32 plane_type,
189 u32 crtc_mask, const u32 *formats,
190 u32 num_formats)
191 {
192 struct tidss_plane *tplane;
193 enum drm_plane_type type;
194 u32 possible_crtcs;
195 u32 num_planes = tidss->feat->num_vids;
196 u32 color_encodings = (BIT(DRM_COLOR_YCBCR_BT601) |
197 BIT(DRM_COLOR_YCBCR_BT709));
198 u32 color_ranges = (BIT(DRM_COLOR_YCBCR_FULL_RANGE) |
199 BIT(DRM_COLOR_YCBCR_LIMITED_RANGE));
200 u32 default_encoding = DRM_COLOR_YCBCR_BT601;
201 u32 default_range = DRM_COLOR_YCBCR_FULL_RANGE;
202 u32 blend_modes = (BIT(DRM_MODE_BLEND_PREMULTI) |
203 BIT(DRM_MODE_BLEND_COVERAGE));
204 int ret;
205
206 tplane = kzalloc_obj(*tplane);
207 if (!tplane)
208 return ERR_PTR(-ENOMEM);
209
210 tplane->hw_plane_id = hw_plane_id;
211
212 possible_crtcs = crtc_mask;
213 type = plane_type;
214
215 ret = drm_universal_plane_init(&tidss->ddev, &tplane->plane,
216 possible_crtcs,
217 &tidss_plane_funcs,
218 formats, num_formats,
219 NULL, type, NULL);
220 if (ret < 0)
221 goto err;
222
223 if (type == DRM_PLANE_TYPE_PRIMARY)
224 drm_plane_helper_add(&tplane->plane, &tidss_primary_plane_helper_funcs);
225 else
226 drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs);
227
228 drm_plane_create_zpos_property(&tplane->plane, tidss->num_planes, 0,
229 num_planes - 1);
230
231 ret = drm_plane_create_color_properties(&tplane->plane,
232 color_encodings,
233 color_ranges,
234 default_encoding,
235 default_range);
236 if (ret)
237 goto err;
238
239 ret = drm_plane_create_alpha_property(&tplane->plane);
240 if (ret)
241 goto err;
242
243 ret = drm_plane_create_blend_mode_property(&tplane->plane, blend_modes);
244 if (ret)
245 goto err;
246
247 return tplane;
248
249 err:
250 kfree(tplane);
251 return ERR_PTR(ret);
252 }
253