1 /*
2 * shmob_drm_plane.c -- SH Mobile DRM Planes
3 *
4 * Copyright (C) 2012 Renesas Electronics Corporation
5 *
6 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <drm/drmP.h>
15 #include <drm/drm_crtc.h>
16 #include <drm/drm_crtc_helper.h>
17 #include <drm/drm_fb_cma_helper.h>
18 #include <drm/drm_gem_cma_helper.h>
19
20 #include <video/sh_mobile_meram.h>
21
22 #include "shmob_drm_drv.h"
23 #include "shmob_drm_kms.h"
24 #include "shmob_drm_plane.h"
25 #include "shmob_drm_regs.h"
26
27 struct shmob_drm_plane {
28 struct drm_plane plane;
29 unsigned int index;
30 unsigned int alpha;
31
32 const struct shmob_drm_format_info *format;
33 unsigned long dma[2];
34
35 unsigned int src_x;
36 unsigned int src_y;
37 unsigned int crtc_x;
38 unsigned int crtc_y;
39 unsigned int crtc_w;
40 unsigned int crtc_h;
41 };
42
43 #define to_shmob_plane(p) container_of(p, struct shmob_drm_plane, plane)
44
shmob_drm_plane_compute_base(struct shmob_drm_plane * splane,struct drm_framebuffer * fb,int x,int y)45 static void shmob_drm_plane_compute_base(struct shmob_drm_plane *splane,
46 struct drm_framebuffer *fb,
47 int x, int y)
48 {
49 struct drm_gem_cma_object *gem;
50 unsigned int bpp;
51
52 bpp = splane->format->yuv ? 8 : splane->format->bpp;
53 gem = drm_fb_cma_get_gem_obj(fb, 0);
54 splane->dma[0] = gem->paddr + fb->offsets[0]
55 + y * fb->pitches[0] + x * bpp / 8;
56
57 if (splane->format->yuv) {
58 bpp = splane->format->bpp - 8;
59 gem = drm_fb_cma_get_gem_obj(fb, 1);
60 splane->dma[1] = gem->paddr + fb->offsets[1]
61 + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
62 + x * (bpp == 16 ? 2 : 1);
63 }
64 }
65
__shmob_drm_plane_setup(struct shmob_drm_plane * splane,struct drm_framebuffer * fb)66 static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
67 struct drm_framebuffer *fb)
68 {
69 struct shmob_drm_device *sdev = splane->plane.dev->dev_private;
70 u32 format;
71
72 /* TODO: Support ROP3 mode */
73 format = LDBBSIFR_EN | (splane->alpha << LDBBSIFR_LAY_SHIFT);
74
75 switch (splane->format->fourcc) {
76 case DRM_FORMAT_RGB565:
77 case DRM_FORMAT_NV21:
78 case DRM_FORMAT_NV61:
79 case DRM_FORMAT_NV42:
80 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
81 break;
82 case DRM_FORMAT_RGB888:
83 case DRM_FORMAT_NV12:
84 case DRM_FORMAT_NV16:
85 case DRM_FORMAT_NV24:
86 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
87 break;
88 case DRM_FORMAT_ARGB8888:
89 default:
90 format |= LDBBSIFR_SWPL;
91 break;
92 }
93
94 switch (splane->format->fourcc) {
95 case DRM_FORMAT_RGB565:
96 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
97 break;
98 case DRM_FORMAT_RGB888:
99 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
100 break;
101 case DRM_FORMAT_ARGB8888:
102 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
103 break;
104 case DRM_FORMAT_NV12:
105 case DRM_FORMAT_NV21:
106 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
107 break;
108 case DRM_FORMAT_NV16:
109 case DRM_FORMAT_NV61:
110 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
111 break;
112 case DRM_FORMAT_NV24:
113 case DRM_FORMAT_NV42:
114 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
115 break;
116 }
117
118 #define plane_reg_dump(sdev, splane, reg) \
119 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x 0x%08x\n", __func__, \
120 splane->index, #reg, \
121 lcdc_read(sdev, reg(splane->index)), \
122 lcdc_read(sdev, reg(splane->index) + LCDC_SIDE_B_OFFSET))
123
124 plane_reg_dump(sdev, splane, LDBnBSIFR);
125 plane_reg_dump(sdev, splane, LDBnBSSZR);
126 plane_reg_dump(sdev, splane, LDBnBLOCR);
127 plane_reg_dump(sdev, splane, LDBnBSMWR);
128 plane_reg_dump(sdev, splane, LDBnBSAYR);
129 plane_reg_dump(sdev, splane, LDBnBSACR);
130
131 lcdc_write(sdev, LDBCR, LDBCR_UPC(splane->index));
132 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
133 "LDBCR", lcdc_read(sdev, LDBCR));
134
135 lcdc_write(sdev, LDBnBSIFR(splane->index), format);
136
137 lcdc_write(sdev, LDBnBSSZR(splane->index),
138 (splane->crtc_h << LDBBSSZR_BVSS_SHIFT) |
139 (splane->crtc_w << LDBBSSZR_BHSS_SHIFT));
140 lcdc_write(sdev, LDBnBLOCR(splane->index),
141 (splane->crtc_y << LDBBLOCR_CVLC_SHIFT) |
142 (splane->crtc_x << LDBBLOCR_CHLC_SHIFT));
143 lcdc_write(sdev, LDBnBSMWR(splane->index),
144 fb->pitches[0] << LDBBSMWR_BSMW_SHIFT);
145
146 shmob_drm_plane_compute_base(splane, fb, splane->src_x, splane->src_y);
147
148 lcdc_write(sdev, LDBnBSAYR(splane->index), splane->dma[0]);
149 if (splane->format->yuv)
150 lcdc_write(sdev, LDBnBSACR(splane->index), splane->dma[1]);
151
152 lcdc_write(sdev, LDBCR,
153 LDBCR_UPF(splane->index) | LDBCR_UPD(splane->index));
154 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
155 "LDBCR", lcdc_read(sdev, LDBCR));
156
157 plane_reg_dump(sdev, splane, LDBnBSIFR);
158 plane_reg_dump(sdev, splane, LDBnBSSZR);
159 plane_reg_dump(sdev, splane, LDBnBLOCR);
160 plane_reg_dump(sdev, splane, LDBnBSMWR);
161 plane_reg_dump(sdev, splane, LDBnBSAYR);
162 plane_reg_dump(sdev, splane, LDBnBSACR);
163 }
164
shmob_drm_plane_setup(struct drm_plane * plane)165 void shmob_drm_plane_setup(struct drm_plane *plane)
166 {
167 struct shmob_drm_plane *splane = to_shmob_plane(plane);
168
169 if (plane->fb == NULL)
170 return;
171
172 __shmob_drm_plane_setup(splane, plane->fb);
173 }
174
175 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)176 shmob_drm_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
177 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
178 unsigned int crtc_w, unsigned int crtc_h,
179 uint32_t src_x, uint32_t src_y,
180 uint32_t src_w, uint32_t src_h)
181 {
182 struct shmob_drm_plane *splane = to_shmob_plane(plane);
183 struct shmob_drm_device *sdev = plane->dev->dev_private;
184 const struct shmob_drm_format_info *format;
185
186 format = shmob_drm_format_info(fb->pixel_format);
187 if (format == NULL) {
188 dev_dbg(sdev->dev, "update_plane: unsupported format %08x\n",
189 fb->pixel_format);
190 return -EINVAL;
191 }
192
193 if (src_w >> 16 != crtc_w || src_h >> 16 != crtc_h) {
194 dev_dbg(sdev->dev, "%s: scaling not supported\n", __func__);
195 return -EINVAL;
196 }
197
198 splane->format = format;
199
200 splane->src_x = src_x >> 16;
201 splane->src_y = src_y >> 16;
202 splane->crtc_x = crtc_x;
203 splane->crtc_y = crtc_y;
204 splane->crtc_w = crtc_w;
205 splane->crtc_h = crtc_h;
206
207 __shmob_drm_plane_setup(splane, fb);
208 return 0;
209 }
210
shmob_drm_plane_disable(struct drm_plane * plane)211 static int shmob_drm_plane_disable(struct drm_plane *plane)
212 {
213 struct shmob_drm_plane *splane = to_shmob_plane(plane);
214 struct shmob_drm_device *sdev = plane->dev->dev_private;
215
216 splane->format = NULL;
217
218 lcdc_write(sdev, LDBnBSIFR(splane->index), 0);
219 return 0;
220 }
221
shmob_drm_plane_destroy(struct drm_plane * plane)222 static void shmob_drm_plane_destroy(struct drm_plane *plane)
223 {
224 shmob_drm_plane_disable(plane);
225 drm_plane_cleanup(plane);
226 }
227
228 static const struct drm_plane_funcs shmob_drm_plane_funcs = {
229 .update_plane = shmob_drm_plane_update,
230 .disable_plane = shmob_drm_plane_disable,
231 .destroy = shmob_drm_plane_destroy,
232 };
233
234 static const uint32_t formats[] = {
235 DRM_FORMAT_RGB565,
236 DRM_FORMAT_RGB888,
237 DRM_FORMAT_ARGB8888,
238 DRM_FORMAT_NV12,
239 DRM_FORMAT_NV21,
240 DRM_FORMAT_NV16,
241 DRM_FORMAT_NV61,
242 DRM_FORMAT_NV24,
243 DRM_FORMAT_NV42,
244 };
245
shmob_drm_plane_create(struct shmob_drm_device * sdev,unsigned int index)246 int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index)
247 {
248 struct shmob_drm_plane *splane;
249 int ret;
250
251 splane = devm_kzalloc(sdev->dev, sizeof(*splane), GFP_KERNEL);
252 if (splane == NULL)
253 return -ENOMEM;
254
255 splane->index = index;
256 splane->alpha = 255;
257
258 ret = drm_plane_init(sdev->ddev, &splane->plane, 1,
259 &shmob_drm_plane_funcs, formats,
260 ARRAY_SIZE(formats), false);
261
262 return ret;
263 }
264