1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright 2015 Freescale Semiconductor, Inc.
4 *
5 * Freescale DCU drm device driver
6 */
7
8#include <linux/regmap.h>
9
10#include <drm/drm_atomic.h>
11#include <drm/drm_atomic_helper.h>
12#include <drm/drm_crtc.h>
13#include <drm/drm_fb_dma_helper.h>
14#include <drm/drm_fourcc.h>
15#include <drm/drm_framebuffer.h>
16#include <drm/drm_gem_dma_helper.h>
17#include <drm/drm_plane_helper.h>
18#include <drm/drm_probe_helper.h>
19
20#include "fsl_dcu_drm_drv.h"
21#include "fsl_dcu_drm_plane.h"
22
23static int fsl_dcu_drm_plane_index(struct drm_plane *plane)
24{
25 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
26 unsigned int total_layer = fsl_dev->soc->total_layer;
27 unsigned int index;
28
29 index = drm_plane_index(plane);
30 if (index < total_layer)
31 return total_layer - index - 1;
32
33 dev_err(fsl_dev->dev, "No more layer left\n");
34 return -EINVAL;
35}
36
37static int fsl_dcu_drm_plane_atomic_check(struct drm_plane *plane,
38 struct drm_atomic_state *state)
39{
40 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
41 plane);
42 struct drm_framebuffer *fb = new_plane_state->fb;
43
44 if (!new_plane_state->fb || !new_plane_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
63static void fsl_dcu_drm_plane_atomic_disable(struct drm_plane *plane,
64 struct drm_atomic_state *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(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), val: &value);
75 value &= ~DCU_LAYER_EN;
76 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 4), val: value);
77}
78
79static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
80 struct drm_atomic_state *state)
81
82{
83 struct fsl_dcu_drm_device *fsl_dev = plane->dev->dev_private;
84 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
85 plane);
86 struct drm_framebuffer *fb = plane->state->fb;
87 struct drm_gem_dma_object *gem;
88 unsigned int alpha = DCU_LAYER_AB_NONE, bpp;
89 int index;
90
91 if (!fb)
92 return;
93
94 index = fsl_dcu_drm_plane_index(plane);
95 if (index < 0)
96 return;
97
98 gem = drm_fb_dma_get_gem_obj(fb, plane: 0);
99
100 switch (fb->format->format) {
101 case DRM_FORMAT_RGB565:
102 bpp = FSL_DCU_RGB565;
103 break;
104 case DRM_FORMAT_RGB888:
105 bpp = FSL_DCU_RGB888;
106 break;
107 case DRM_FORMAT_ARGB8888:
108 alpha = DCU_LAYER_AB_WHOLE_FRAME;
109 fallthrough;
110 case DRM_FORMAT_XRGB8888:
111 bpp = FSL_DCU_ARGB8888;
112 break;
113 case DRM_FORMAT_ARGB4444:
114 alpha = DCU_LAYER_AB_WHOLE_FRAME;
115 fallthrough;
116 case DRM_FORMAT_XRGB4444:
117 bpp = FSL_DCU_ARGB4444;
118 break;
119 case DRM_FORMAT_ARGB1555:
120 alpha = DCU_LAYER_AB_WHOLE_FRAME;
121 fallthrough;
122 case DRM_FORMAT_XRGB1555:
123 bpp = FSL_DCU_ARGB1555;
124 break;
125 case DRM_FORMAT_YUV422:
126 bpp = FSL_DCU_YUV422;
127 break;
128 default:
129 return;
130 }
131
132 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 1),
133 DCU_LAYER_HEIGHT(new_state->crtc_h) |
134 DCU_LAYER_WIDTH(new_state->crtc_w));
135 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 2),
136 DCU_LAYER_POSY(new_state->crtc_y) |
137 DCU_LAYER_POSX(new_state->crtc_x));
138 regmap_write(map: fsl_dev->regmap,
139 DCU_CTRLDESCLN(index, 3), val: gem->dma_addr);
140 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 4),
141 DCU_LAYER_EN |
142 DCU_LAYER_TRANS(0xff) |
143 DCU_LAYER_BPP(bpp) |
144 alpha);
145 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 5),
146 DCU_LAYER_CKMAX_R(0xFF) |
147 DCU_LAYER_CKMAX_G(0xFF) |
148 DCU_LAYER_CKMAX_B(0xFF));
149 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 6),
150 DCU_LAYER_CKMIN_R(0) |
151 DCU_LAYER_CKMIN_G(0) |
152 DCU_LAYER_CKMIN_B(0));
153 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 7), val: 0);
154 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 8),
155 DCU_LAYER_FG_FCOLOR(0));
156 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 9),
157 DCU_LAYER_BG_BCOLOR(0));
158
159 if (!strcmp(fsl_dev->soc->name, "ls1021a")) {
160 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(index, 10),
161 DCU_LAYER_POST_SKIP(0) |
162 DCU_LAYER_PRE_SKIP(0));
163 }
164
165 return;
166}
167
168static const struct drm_plane_helper_funcs fsl_dcu_drm_plane_helper_funcs = {
169 .atomic_check = fsl_dcu_drm_plane_atomic_check,
170 .atomic_disable = fsl_dcu_drm_plane_atomic_disable,
171 .atomic_update = fsl_dcu_drm_plane_atomic_update,
172};
173
174static const struct drm_plane_funcs fsl_dcu_drm_plane_funcs = {
175 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
176 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
177 .destroy = drm_plane_helper_destroy,
178 .disable_plane = drm_atomic_helper_disable_plane,
179 .reset = drm_atomic_helper_plane_reset,
180 .update_plane = drm_atomic_helper_update_plane,
181};
182
183static const u32 fsl_dcu_drm_plane_formats[] = {
184 DRM_FORMAT_RGB565,
185 DRM_FORMAT_RGB888,
186 DRM_FORMAT_XRGB8888,
187 DRM_FORMAT_ARGB8888,
188 DRM_FORMAT_XRGB4444,
189 DRM_FORMAT_ARGB4444,
190 DRM_FORMAT_XRGB1555,
191 DRM_FORMAT_ARGB1555,
192 DRM_FORMAT_YUV422,
193};
194
195void fsl_dcu_drm_init_planes(struct drm_device *dev)
196{
197 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
198 int i, j;
199
200 for (i = 0; i < fsl_dev->soc->total_layer; i++) {
201 for (j = 1; j <= fsl_dev->soc->layer_regs; j++)
202 regmap_write(map: fsl_dev->regmap, DCU_CTRLDESCLN(i, j), val: 0);
203 }
204}
205
206struct drm_plane *fsl_dcu_drm_primary_create_plane(struct drm_device *dev)
207{
208 struct drm_plane *primary;
209 int ret;
210
211 primary = kzalloc(size: sizeof(*primary), GFP_KERNEL);
212 if (!primary) {
213 DRM_DEBUG_KMS("Failed to allocate primary plane\n");
214 return NULL;
215 }
216
217 /* possible_crtc's will be filled in later by crtc_init */
218 ret = drm_universal_plane_init(dev, plane: primary, possible_crtcs: 0,
219 funcs: &fsl_dcu_drm_plane_funcs,
220 formats: fsl_dcu_drm_plane_formats,
221 ARRAY_SIZE(fsl_dcu_drm_plane_formats),
222 NULL, type: DRM_PLANE_TYPE_PRIMARY, NULL);
223 if (ret) {
224 kfree(objp: primary);
225 primary = NULL;
226 }
227 drm_plane_helper_add(plane: primary, funcs: &fsl_dcu_drm_plane_helper_funcs);
228
229 return primary;
230}
231

source code of linux/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c