1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * shmob_drm_plane.c -- SH Mobile DRM Planes
4 *
5 * Copyright (C) 2012 Renesas Electronics Corporation
6 *
7 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
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_dma_helper.h>
15
16 #include "shmob_drm_drv.h"
17 #include "shmob_drm_kms.h"
18 #include "shmob_drm_plane.h"
19 #include "shmob_drm_regs.h"
20
21 struct shmob_drm_plane {
22 struct drm_plane plane;
23 unsigned int index;
24 unsigned int alpha;
25
26 const struct shmob_drm_format_info *format;
27 unsigned long dma[2];
28
29 unsigned int src_x;
30 unsigned int src_y;
31 unsigned int crtc_x;
32 unsigned int crtc_y;
33 unsigned int crtc_w;
34 unsigned int crtc_h;
35 };
36
37 #define to_shmob_plane(p) container_of(p, struct shmob_drm_plane, plane)
38
shmob_drm_plane_compute_base(struct shmob_drm_plane * splane,struct drm_framebuffer * fb,int x,int y)39 static void shmob_drm_plane_compute_base(struct shmob_drm_plane *splane,
40 struct drm_framebuffer *fb,
41 int x, int y)
42 {
43 struct drm_gem_dma_object *gem;
44 unsigned int bpp;
45
46 bpp = splane->format->yuv ? 8 : splane->format->bpp;
47 gem = drm_fb_dma_get_gem_obj(fb, 0);
48 splane->dma[0] = gem->dma_addr + fb->offsets[0]
49 + y * fb->pitches[0] + x * bpp / 8;
50
51 if (splane->format->yuv) {
52 bpp = splane->format->bpp - 8;
53 gem = drm_fb_dma_get_gem_obj(fb, 1);
54 splane->dma[1] = gem->dma_addr + fb->offsets[1]
55 + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
56 + x * (bpp == 16 ? 2 : 1);
57 }
58 }
59
__shmob_drm_plane_setup(struct shmob_drm_plane * splane,struct drm_framebuffer * fb)60 static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
61 struct drm_framebuffer *fb)
62 {
63 struct shmob_drm_device *sdev = splane->plane.dev->dev_private;
64 u32 format;
65
66 /* TODO: Support ROP3 mode */
67 format = LDBBSIFR_EN | (splane->alpha << LDBBSIFR_LAY_SHIFT);
68
69 switch (splane->format->fourcc) {
70 case DRM_FORMAT_RGB565:
71 case DRM_FORMAT_NV21:
72 case DRM_FORMAT_NV61:
73 case DRM_FORMAT_NV42:
74 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
75 break;
76 case DRM_FORMAT_RGB888:
77 case DRM_FORMAT_NV12:
78 case DRM_FORMAT_NV16:
79 case DRM_FORMAT_NV24:
80 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
81 break;
82 case DRM_FORMAT_ARGB8888:
83 default:
84 format |= LDBBSIFR_SWPL;
85 break;
86 }
87
88 switch (splane->format->fourcc) {
89 case DRM_FORMAT_RGB565:
90 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
91 break;
92 case DRM_FORMAT_RGB888:
93 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
94 break;
95 case DRM_FORMAT_ARGB8888:
96 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
97 break;
98 case DRM_FORMAT_NV12:
99 case DRM_FORMAT_NV21:
100 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
101 break;
102 case DRM_FORMAT_NV16:
103 case DRM_FORMAT_NV61:
104 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
105 break;
106 case DRM_FORMAT_NV24:
107 case DRM_FORMAT_NV42:
108 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
109 break;
110 }
111
112 #define plane_reg_dump(sdev, splane, reg) \
113 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x 0x%08x\n", __func__, \
114 splane->index, #reg, \
115 lcdc_read(sdev, reg(splane->index)), \
116 lcdc_read(sdev, reg(splane->index) + LCDC_SIDE_B_OFFSET))
117
118 plane_reg_dump(sdev, splane, LDBnBSIFR);
119 plane_reg_dump(sdev, splane, LDBnBSSZR);
120 plane_reg_dump(sdev, splane, LDBnBLOCR);
121 plane_reg_dump(sdev, splane, LDBnBSMWR);
122 plane_reg_dump(sdev, splane, LDBnBSAYR);
123 plane_reg_dump(sdev, splane, LDBnBSACR);
124
125 lcdc_write(sdev, LDBCR, LDBCR_UPC(splane->index));
126 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
127 "LDBCR", lcdc_read(sdev, LDBCR));
128
129 lcdc_write(sdev, LDBnBSIFR(splane->index), format);
130
131 lcdc_write(sdev, LDBnBSSZR(splane->index),
132 (splane->crtc_h << LDBBSSZR_BVSS_SHIFT) |
133 (splane->crtc_w << LDBBSSZR_BHSS_SHIFT));
134 lcdc_write(sdev, LDBnBLOCR(splane->index),
135 (splane->crtc_y << LDBBLOCR_CVLC_SHIFT) |
136 (splane->crtc_x << LDBBLOCR_CHLC_SHIFT));
137 lcdc_write(sdev, LDBnBSMWR(splane->index),
138 fb->pitches[0] << LDBBSMWR_BSMW_SHIFT);
139
140 shmob_drm_plane_compute_base(splane, fb, splane->src_x, splane->src_y);
141
142 lcdc_write(sdev, LDBnBSAYR(splane->index), splane->dma[0]);
143 if (splane->format->yuv)
144 lcdc_write(sdev, LDBnBSACR(splane->index), splane->dma[1]);
145
146 lcdc_write(sdev, LDBCR,
147 LDBCR_UPF(splane->index) | LDBCR_UPD(splane->index));
148 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
149 "LDBCR", lcdc_read(sdev, LDBCR));
150
151 plane_reg_dump(sdev, splane, LDBnBSIFR);
152 plane_reg_dump(sdev, splane, LDBnBSSZR);
153 plane_reg_dump(sdev, splane, LDBnBLOCR);
154 plane_reg_dump(sdev, splane, LDBnBSMWR);
155 plane_reg_dump(sdev, splane, LDBnBSAYR);
156 plane_reg_dump(sdev, splane, LDBnBSACR);
157 }
158
shmob_drm_plane_setup(struct drm_plane * plane)159 void shmob_drm_plane_setup(struct drm_plane *plane)
160 {
161 struct shmob_drm_plane *splane = to_shmob_plane(plane);
162
163 if (plane->fb == NULL)
164 return;
165
166 __shmob_drm_plane_setup(splane, plane->fb);
167 }
168
169 static int
shmob_drm_plane_update(struct drm_plane * plane,struct drm_crtc * crtc,struct drm_framebuffer * fb,int crtc_x,int crtc_y,unsigned int crtc_w,unsigned int crtc_h,uint32_t src_x,uint32_t src_y,uint32_t src_w,uint32_t src_h,struct drm_modeset_acquire_ctx * ctx)170 shmob_drm_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
171 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
172 unsigned int crtc_w, unsigned int crtc_h,
173 uint32_t src_x, uint32_t src_y,
174 uint32_t src_w, uint32_t src_h,
175 struct drm_modeset_acquire_ctx *ctx)
176 {
177 struct shmob_drm_plane *splane = to_shmob_plane(plane);
178 struct shmob_drm_device *sdev = plane->dev->dev_private;
179 const struct shmob_drm_format_info *format;
180
181 format = shmob_drm_format_info(fb->format->format);
182 if (format == NULL) {
183 dev_dbg(sdev->dev, "update_plane: unsupported format %08x\n",
184 fb->format->format);
185 return -EINVAL;
186 }
187
188 if (src_w >> 16 != crtc_w || src_h >> 16 != crtc_h) {
189 dev_dbg(sdev->dev, "%s: scaling not supported\n", __func__);
190 return -EINVAL;
191 }
192
193 splane->format = format;
194
195 splane->src_x = src_x >> 16;
196 splane->src_y = src_y >> 16;
197 splane->crtc_x = crtc_x;
198 splane->crtc_y = crtc_y;
199 splane->crtc_w = crtc_w;
200 splane->crtc_h = crtc_h;
201
202 __shmob_drm_plane_setup(splane, fb);
203 return 0;
204 }
205
shmob_drm_plane_disable(struct drm_plane * plane,struct drm_modeset_acquire_ctx * ctx)206 static int shmob_drm_plane_disable(struct drm_plane *plane,
207 struct drm_modeset_acquire_ctx *ctx)
208 {
209 struct shmob_drm_plane *splane = to_shmob_plane(plane);
210 struct shmob_drm_device *sdev = plane->dev->dev_private;
211
212 splane->format = NULL;
213
214 lcdc_write(sdev, LDBnBSIFR(splane->index), 0);
215 return 0;
216 }
217
shmob_drm_plane_destroy(struct drm_plane * plane)218 static void shmob_drm_plane_destroy(struct drm_plane *plane)
219 {
220 drm_plane_force_disable(plane);
221 drm_plane_cleanup(plane);
222 }
223
224 static const struct drm_plane_funcs shmob_drm_plane_funcs = {
225 .update_plane = shmob_drm_plane_update,
226 .disable_plane = shmob_drm_plane_disable,
227 .destroy = shmob_drm_plane_destroy,
228 };
229
230 static const uint32_t formats[] = {
231 DRM_FORMAT_RGB565,
232 DRM_FORMAT_RGB888,
233 DRM_FORMAT_ARGB8888,
234 DRM_FORMAT_NV12,
235 DRM_FORMAT_NV21,
236 DRM_FORMAT_NV16,
237 DRM_FORMAT_NV61,
238 DRM_FORMAT_NV24,
239 DRM_FORMAT_NV42,
240 };
241
shmob_drm_plane_create(struct shmob_drm_device * sdev,unsigned int index)242 int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index)
243 {
244 struct shmob_drm_plane *splane;
245 int ret;
246
247 splane = devm_kzalloc(sdev->dev, sizeof(*splane), GFP_KERNEL);
248 if (splane == NULL)
249 return -ENOMEM;
250
251 splane->index = index;
252 splane->alpha = 255;
253
254 ret = drm_universal_plane_init(sdev->ddev, &splane->plane, 1,
255 &shmob_drm_plane_funcs,
256 formats, ARRAY_SIZE(formats), NULL,
257 DRM_PLANE_TYPE_OVERLAY, NULL);
258
259 return ret;
260 }
261