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 case DRM_FORMAT_XRGB8888:
84 default:
85 format |= LDBBSIFR_SWPL;
86 break;
87 }
88
89 switch (splane->format->fourcc) {
90 case DRM_FORMAT_RGB565:
91 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
92 break;
93 case DRM_FORMAT_RGB888:
94 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
95 break;
96 case DRM_FORMAT_ARGB8888:
97 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
98 break;
99 case DRM_FORMAT_XRGB8888:
100 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
101 break;
102 case DRM_FORMAT_NV12:
103 case DRM_FORMAT_NV21:
104 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
105 break;
106 case DRM_FORMAT_NV16:
107 case DRM_FORMAT_NV61:
108 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
109 break;
110 case DRM_FORMAT_NV24:
111 case DRM_FORMAT_NV42:
112 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
113 break;
114 }
115
116 #define plane_reg_dump(sdev, splane, reg) \
117 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x 0x%08x\n", __func__, \
118 splane->index, #reg, \
119 lcdc_read(sdev, reg(splane->index)), \
120 lcdc_read(sdev, reg(splane->index) + LCDC_SIDE_B_OFFSET))
121
122 plane_reg_dump(sdev, splane, LDBnBSIFR);
123 plane_reg_dump(sdev, splane, LDBnBSSZR);
124 plane_reg_dump(sdev, splane, LDBnBLOCR);
125 plane_reg_dump(sdev, splane, LDBnBSMWR);
126 plane_reg_dump(sdev, splane, LDBnBSAYR);
127 plane_reg_dump(sdev, splane, LDBnBSACR);
128
129 lcdc_write(sdev, LDBCR, LDBCR_UPC(splane->index));
130 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
131 "LDBCR", lcdc_read(sdev, LDBCR));
132
133 lcdc_write(sdev, LDBnBSIFR(splane->index), format);
134
135 lcdc_write(sdev, LDBnBSSZR(splane->index),
136 (splane->crtc_h << LDBBSSZR_BVSS_SHIFT) |
137 (splane->crtc_w << LDBBSSZR_BHSS_SHIFT));
138 lcdc_write(sdev, LDBnBLOCR(splane->index),
139 (splane->crtc_y << LDBBLOCR_CVLC_SHIFT) |
140 (splane->crtc_x << LDBBLOCR_CHLC_SHIFT));
141 lcdc_write(sdev, LDBnBSMWR(splane->index),
142 fb->pitches[0] << LDBBSMWR_BSMW_SHIFT);
143
144 shmob_drm_plane_compute_base(splane, fb, splane->src_x, splane->src_y);
145
146 lcdc_write(sdev, LDBnBSAYR(splane->index), splane->dma[0]);
147 if (splane->format->yuv)
148 lcdc_write(sdev, LDBnBSACR(splane->index), splane->dma[1]);
149
150 lcdc_write(sdev, LDBCR,
151 LDBCR_UPF(splane->index) | LDBCR_UPD(splane->index));
152 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
153 "LDBCR", lcdc_read(sdev, LDBCR));
154
155 plane_reg_dump(sdev, splane, LDBnBSIFR);
156 plane_reg_dump(sdev, splane, LDBnBSSZR);
157 plane_reg_dump(sdev, splane, LDBnBLOCR);
158 plane_reg_dump(sdev, splane, LDBnBSMWR);
159 plane_reg_dump(sdev, splane, LDBnBSAYR);
160 plane_reg_dump(sdev, splane, LDBnBSACR);
161 }
162
shmob_drm_plane_setup(struct drm_plane * plane)163 void shmob_drm_plane_setup(struct drm_plane *plane)
164 {
165 struct shmob_drm_plane *splane = to_shmob_plane(plane);
166
167 if (plane->fb == NULL)
168 return;
169
170 __shmob_drm_plane_setup(splane, plane->fb);
171 }
172
173 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)174 shmob_drm_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
175 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
176 unsigned int crtc_w, unsigned int crtc_h,
177 uint32_t src_x, uint32_t src_y,
178 uint32_t src_w, uint32_t src_h,
179 struct drm_modeset_acquire_ctx *ctx)
180 {
181 struct shmob_drm_plane *splane = to_shmob_plane(plane);
182 struct shmob_drm_device *sdev = plane->dev->dev_private;
183 const struct shmob_drm_format_info *format;
184
185 format = shmob_drm_format_info(fb->format->format);
186 if (format == NULL) {
187 dev_dbg(sdev->dev, "update_plane: unsupported format %08x\n",
188 fb->format->format);
189 return -EINVAL;
190 }
191
192 if (src_w >> 16 != crtc_w || src_h >> 16 != crtc_h) {
193 dev_dbg(sdev->dev, "%s: scaling not supported\n", __func__);
194 return -EINVAL;
195 }
196
197 splane->format = format;
198
199 splane->src_x = src_x >> 16;
200 splane->src_y = src_y >> 16;
201 splane->crtc_x = crtc_x;
202 splane->crtc_y = crtc_y;
203 splane->crtc_w = crtc_w;
204 splane->crtc_h = crtc_h;
205
206 __shmob_drm_plane_setup(splane, fb);
207 return 0;
208 }
209
shmob_drm_plane_disable(struct drm_plane * plane,struct drm_modeset_acquire_ctx * ctx)210 static int shmob_drm_plane_disable(struct drm_plane *plane,
211 struct drm_modeset_acquire_ctx *ctx)
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 drm_plane_force_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_XRGB8888,
239 DRM_FORMAT_NV12,
240 DRM_FORMAT_NV21,
241 DRM_FORMAT_NV16,
242 DRM_FORMAT_NV61,
243 DRM_FORMAT_NV24,
244 DRM_FORMAT_NV42,
245 };
246
shmob_drm_plane_create(struct shmob_drm_device * sdev,unsigned int index)247 int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index)
248 {
249 struct shmob_drm_plane *splane;
250 int ret;
251
252 splane = devm_kzalloc(sdev->dev, sizeof(*splane), GFP_KERNEL);
253 if (splane == NULL)
254 return -ENOMEM;
255
256 splane->index = index;
257 splane->alpha = 255;
258
259 ret = drm_universal_plane_init(sdev->ddev, &splane->plane, 1,
260 &shmob_drm_plane_funcs,
261 formats, ARRAY_SIZE(formats), NULL,
262 DRM_PLANE_TYPE_OVERLAY, NULL);
263
264 return ret;
265 }
266