1 /*
2 * Copyright 2015 Freescale Semiconductor, Inc.
3 *
4 * Freescale DCU drm device driver
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12 #include <linux/regmap.h>
13
14 #include <drm/drmP.h>
15 #include <drm/drm_atomic_helper.h>
16 #include <drm/drm_crtc.h>
17 #include <drm/drm_crtc_helper.h>
18 #include <drm/drm_fb_cma_helper.h>
19 #include <drm/drm_gem_cma_helper.h>
20 #include <drm/drm_plane_helper.h>
21
22 #include "fsl_dcu_drm_drv.h"
23 #include "fsl_dcu_drm_plane.h"
24
fsl_dcu_drm_plane_index(struct drm_plane * plane)25 static int fsl_dcu_drm_plane_index(struct drm_plane *plane)
26 {
27 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
28 unsigned int total_layer = fsl_dev->soc->total_layer;
29 unsigned int index;
30
31 index = drm_plane_index(plane);
32 if (index < total_layer)
33 return total_layer - index - 1;
34
35 dev_err(fsl_dev->dev, "No more layer left\n");
36 return -EINVAL;
37 }
38
fsl_dcu_drm_plane_atomic_check(struct drm_plane * plane,struct drm_plane_state * state)39 static int fsl_dcu_drm_plane_atomic_check(struct drm_plane *plane,
40 struct drm_plane_state *state)
41 {
42 struct drm_framebuffer *fb = state->fb;
43
44 if (!state->fb || !state->crtc)
45 return 0;
46
47 switch (fb->format->format) {
48 case DRM_FORMAT_RGB565:
49 case DRM_FORMAT_RGB888:
50 case DRM_FORMAT_XRGB8888:
51 case DRM_FORMAT_ARGB8888:
52 case DRM_FORMAT_XRGB4444:
53 case DRM_FORMAT_ARGB4444:
54 case DRM_FORMAT_XRGB1555:
55 case DRM_FORMAT_ARGB1555:
56 case DRM_FORMAT_YUV422:
57 return 0;
58 default:
59 return -EINVAL;
60 }
61 }
62
fsl_dcu_drm_plane_atomic_disable(struct drm_plane * plane,struct drm_plane_state * old_state)63 static void fsl_dcu_drm_plane_atomic_disable(struct drm_plane *plane,
64 struct drm_plane_state *old_state)
65 {
66 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
67 unsigned int value;
68 int index;
69
70 index = fsl_dcu_drm_plane_index(plane);
71 if (index < 0)
72 return;
73
74 regmap_read(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), &value);
75 value &= ~DCU_LAYER_EN;
76 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), value);
77 }
78
fsl_dcu_drm_plane_atomic_update(struct drm_plane * plane,struct drm_plane_state * old_state)79 static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
80 struct drm_plane_state *old_state)
81
82 {
83 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
84 struct drm_plane_state *state = plane->state;
85 struct drm_framebuffer *fb = plane->state->fb;
86 struct drm_gem_cma_object *gem;
87 unsigned int alpha = DCU_LAYER_AB_NONE, bpp;
88 int index;
89
90 if (!fb)
91 return;
92
93 index = fsl_dcu_drm_plane_index(plane);
94 if (index < 0)
95 return;
96
97 gem = drm_fb_cma_get_gem_obj(fb, 0);
98
99 switch (fb->format->format) {
100 case DRM_FORMAT_RGB565:
101 bpp = FSL_DCU_RGB565;
102 break;
103 case DRM_FORMAT_RGB888:
104 bpp = FSL_DCU_RGB888;
105 break;
106 case DRM_FORMAT_ARGB8888:
107 alpha = DCU_LAYER_AB_WHOLE_FRAME;
108 /* fall-through */
109 case DRM_FORMAT_XRGB8888:
110 bpp = FSL_DCU_ARGB8888;
111 break;
112 case DRM_FORMAT_ARGB4444:
113 alpha = DCU_LAYER_AB_WHOLE_FRAME;
114 /* fall-through */
115 case DRM_FORMAT_XRGB4444:
116 bpp = FSL_DCU_ARGB4444;
117 break;
118 case DRM_FORMAT_ARGB1555:
119 alpha = DCU_LAYER_AB_WHOLE_FRAME;
120 /* fall-through */
121 case DRM_FORMAT_XRGB1555:
122 bpp = FSL_DCU_ARGB1555;
123 break;
124 case DRM_FORMAT_YUV422:
125 bpp = FSL_DCU_YUV422;
126 break;
127 default:
128 return;
129 }
130
131 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 1),
132 DCU_LAYER_HEIGHT(state->crtc_h) |
133 DCU_LAYER_WIDTH(state->crtc_w));
134 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 2),
135 DCU_LAYER_POSY(state->crtc_y) |
136 DCU_LAYER_POSX(state->crtc_x));
137 regmap_write(fsl_dev->regmap,
138 DCU_CTRLDESCLN(index, 3), gem->paddr);
139 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 4),
140 DCU_LAYER_EN |
141 DCU_LAYER_TRANS(0xff) |
142 DCU_LAYER_BPP(bpp) |
143 alpha);
144 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 5),
145 DCU_LAYER_CKMAX_R(0xFF) |
146 DCU_LAYER_CKMAX_G(0xFF) |
147 DCU_LAYER_CKMAX_B(0xFF));
148 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 6),
149 DCU_LAYER_CKMIN_R(0) |
150 DCU_LAYER_CKMIN_G(0) |
151 DCU_LAYER_CKMIN_B(0));
152 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 7), 0);
153 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 8),
154 DCU_LAYER_FG_FCOLOR(0));
155 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 9),
156 DCU_LAYER_BG_BCOLOR(0));
157
158 if (!strcmp(fsl_dev->soc->name, "ls1021a")) {
159 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(index, 10),
160 DCU_LAYER_POST_SKIP(0) |
161 DCU_LAYER_PRE_SKIP(0));
162 }
163
164 return;
165 }
166
167 static const struct drm_plane_helper_funcs fsl_dcu_drm_plane_helper_funcs = {
168 .atomic_check = fsl_dcu_drm_plane_atomic_check,
169 .atomic_disable = fsl_dcu_drm_plane_atomic_disable,
170 .atomic_update = fsl_dcu_drm_plane_atomic_update,
171 };
172
fsl_dcu_drm_plane_destroy(struct drm_plane * plane)173 static void fsl_dcu_drm_plane_destroy(struct drm_plane *plane)
174 {
175 drm_plane_cleanup(plane);
176 kfree(plane);
177 }
178
179 static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = {
180 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
181 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
182 .destroy = fsl_dcu_drm_plane_destroy,
183 .disable_plane = drm_atomic_helper_disable_plane,
184 .reset = drm_atomic_helper_plane_reset,
185 .update_plane = drm_atomic_helper_update_plane,
186 };
187
188 static const u32 fsl_dcu_drm_plane_formats[] = {
189 DRM_FORMAT_RGB565,
190 DRM_FORMAT_RGB888,
191 DRM_FORMAT_XRGB8888,
192 DRM_FORMAT_ARGB8888,
193 DRM_FORMAT_XRGB4444,
194 DRM_FORMAT_ARGB4444,
195 DRM_FORMAT_XRGB1555,
196 DRM_FORMAT_ARGB1555,
197 DRM_FORMAT_YUV422,
198 };
199
fsl_dcu_drm_init_planes(struct drm_device * dev)200 void fsl_dcu_drm_init_planes(struct drm_device *dev)
201 {
202 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
203 int i, j;
204
205 for (i = 0; i < fsl_dev->soc->total_layer; i++) {
206 for (j = 1; j <= fsl_dev->soc->layer_regs; j++)
207 regmap_write(fsl_dev->regmap, DCU_CTRLDESCLN(i, j), 0);
208 }
209 }
210
fsl_dcu_drm_primary_create_plane(struct drm_device * dev)211 struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev)
212 {
213 struct drm_plane *primary;
214 int ret;
215
216 primary = kzalloc(sizeof(*primary), GFP_KERNEL);
217 if (!primary) {
218 DRM_DEBUG_KMS("Failed to allocate primary plane\n");
219 return NULL;
220 }
221
222 /* possible_crtc's will be filled in later by crtc_init */
223 ret = drm_universal_plane_init(dev, primary, 0,
224 &fsl_dcu_drm_plane_funcs,
225 fsl_dcu_drm_plane_formats,
226 ARRAY_SIZE(fsl_dcu_drm_plane_formats),
227 NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
228 if (ret) {
229 kfree(primary);
230 primary = NULL;
231 }
232 drm_plane_helper_add(primary, &fsl_dcu_drm_plane_helper_funcs);
233
234 return primary;
235 }
236
