tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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_crtc_helper.h>
12#include <drm/drm_fb_cma_helper.h>
13#include <drm/drm_fourcc.h>
14#include <drm/drm_framebuffer.h>
15#include <drm/drm_gem_cma_helper.h>
16
17#include "shmob_drm_drv.h"
18#include "shmob_drm_kms.h"
19#include "shmob_drm_plane.h"
20#include "shmob_drm_regs.h"
21
22struct shmob_drm_plane {
23 struct drm_plane plane;
24 unsigned int index;
25 unsigned int alpha;
26
27 const struct shmob_drm_format_info *format;
28 unsigned long dma[2];
29
30 unsigned int src_x;
31 unsigned int src_y;
32 unsigned int crtc_x;
33 unsigned int crtc_y;
34 unsigned int crtc_w;
35 unsigned int crtc_h;
36};
37
38#define to_shmob_plane(p) container_of(p, struct shmob_drm_plane, plane)
39
40static void shmob_drm_plane_compute_base(struct shmob_drm_plane *splane,
41 struct drm_framebuffer *fb,
42 int x, int y)
43{
44 struct drm_gem_cma_object *gem;
45 unsigned int bpp;
46
47 bpp = splane->format->yuv ? 8 : splane->format->bpp;
48 gem = drm_fb_cma_get_gem_obj(fb, 0);
49 splane->dma[0] = gem->paddr + fb->offsets[0]
50 + y * fb->pitches[0] + x * bpp / 8;
51
52 if (splane->format->yuv) {
53 bpp = splane->format->bpp - 8;
54 gem = drm_fb_cma_get_gem_obj(fb, 1);
55 splane->dma[1] = gem->paddr + fb->offsets[1]
56 + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
57 + x * (bpp == 16 ? 2 : 1);
58 }
59}
60
61static void __shmob_drm_plane_setup(struct shmob_drm_plane *splane,
62 struct drm_framebuffer *fb)
63{
64 struct shmob_drm_device *sdev = splane->plane.dev->dev_private;
65 u32 format;
66
67 /* TODO: Support ROP3 mode */
68 format = LDBBSIFR_EN | (splane->alpha << LDBBSIFR_LAY_SHIFT);
69
70 switch (splane->format->fourcc) {
71 case DRM_FORMAT_RGB565:
72 case DRM_FORMAT_NV21:
73 case DRM_FORMAT_NV61:
74 case DRM_FORMAT_NV42:
75 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
76 break;
77 case DRM_FORMAT_RGB888:
78 case DRM_FORMAT_NV12:
79 case DRM_FORMAT_NV16:
80 case DRM_FORMAT_NV24:
81 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
82 break;
83 case DRM_FORMAT_ARGB8888:
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_NV12:
100 case DRM_FORMAT_NV21:
101 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
102 break;
103 case DRM_FORMAT_NV16:
104 case DRM_FORMAT_NV61:
105 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
106 break;
107 case DRM_FORMAT_NV24:
108 case DRM_FORMAT_NV42:
109 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
110 break;
111 }
112
113#define plane_reg_dump(sdev, splane, reg) \
114 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x 0x%08x\n", __func__, \
115 splane->index, #reg, \
116 lcdc_read(sdev, reg(splane->index)), \
117 lcdc_read(sdev, reg(splane->index) + LCDC_SIDE_B_OFFSET))
118
119 plane_reg_dump(sdev, splane, LDBnBSIFR);
120 plane_reg_dump(sdev, splane, LDBnBSSZR);
121 plane_reg_dump(sdev, splane, LDBnBLOCR);
122 plane_reg_dump(sdev, splane, LDBnBSMWR);
123 plane_reg_dump(sdev, splane, LDBnBSAYR);
124 plane_reg_dump(sdev, splane, LDBnBSACR);
125
126 lcdc_write(sdev, LDBCR, LDBCR_UPC(splane->index));
127 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
128 "LDBCR", lcdc_read(sdev, LDBCR));
129
130 lcdc_write(sdev, LDBnBSIFR(splane->index), format);
131
132 lcdc_write(sdev, LDBnBSSZR(splane->index),
133 (splane->crtc_h << LDBBSSZR_BVSS_SHIFT) |
134 (splane->crtc_w << LDBBSSZR_BHSS_SHIFT));
135 lcdc_write(sdev, LDBnBLOCR(splane->index),
136 (splane->crtc_y << LDBBLOCR_CVLC_SHIFT) |
137 (splane->crtc_x << LDBBLOCR_CHLC_SHIFT));
138 lcdc_write(sdev, LDBnBSMWR(splane->index),
139 fb->pitches[0] << LDBBSMWR_BSMW_SHIFT);
140
141 shmob_drm_plane_compute_base(splane, fb, splane->src_x, splane->src_y);
142
143 lcdc_write(sdev, LDBnBSAYR(splane->index), splane->dma[0]);
144 if (splane->format->yuv)
145 lcdc_write(sdev, LDBnBSACR(splane->index), splane->dma[1]);
146
147 lcdc_write(sdev, LDBCR,
148 LDBCR_UPF(splane->index) | LDBCR_UPD(splane->index));
149 dev_dbg(sdev->ddev->dev, "%s(%u): %s 0x%08x\n", __func__, splane->index,
150 "LDBCR", lcdc_read(sdev, LDBCR));
151
152 plane_reg_dump(sdev, splane, LDBnBSIFR);
153 plane_reg_dump(sdev, splane, LDBnBSSZR);
154 plane_reg_dump(sdev, splane, LDBnBLOCR);
155 plane_reg_dump(sdev, splane, LDBnBSMWR);
156 plane_reg_dump(sdev, splane, LDBnBSAYR);
157 plane_reg_dump(sdev, splane, LDBnBSACR);
158}
159
160void shmob_drm_plane_setup(struct drm_plane *plane)
161{
162 struct shmob_drm_plane *splane = to_shmob_plane(plane);
163
164 if (plane->fb == NULL)
165 return;
166
167 __shmob_drm_plane_setup(splane, plane->fb);
168}
169
170static int
171shmob_drm_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
172 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
173 unsigned int crtc_w, unsigned int crtc_h,
174 uint32_t src_x, uint32_t src_y,
175 uint32_t src_w, uint32_t src_h,
176 struct drm_modeset_acquire_ctx *ctx)
177{
178 struct shmob_drm_plane *splane = to_shmob_plane(plane);
179 struct shmob_drm_device *sdev = plane->dev->dev_private;
180 const struct shmob_drm_format_info *format;
181
182 format = shmob_drm_format_info(fb->format->format);
183 if (format == NULL) {
184 dev_dbg(sdev->dev, "update_plane: unsupported format %08x\n",
185 fb->format->format);
186 return -EINVAL;
187 }
188
189 if (src_w >> 16 != crtc_w || src_h >> 16 != crtc_h) {
190 dev_dbg(sdev->dev, "%s: scaling not supported\n", __func__);
191 return -EINVAL;
192 }
193
194 splane->format = format;
195
196 splane->src_x = src_x >> 16;
197 splane->src_y = src_y >> 16;
198 splane->crtc_x = crtc_x;
199 splane->crtc_y = crtc_y;
200 splane->crtc_w = crtc_w;
201 splane->crtc_h = crtc_h;
202
203 __shmob_drm_plane_setup(splane, fb);
204 return 0;
205}
206
207static int shmob_drm_plane_disable(struct drm_plane *plane,
208 struct drm_modeset_acquire_ctx *ctx)
209{
210 struct shmob_drm_plane *splane = to_shmob_plane(plane);
211 struct shmob_drm_device *sdev = plane->dev->dev_private;
212
213 splane->format = NULL;
214
215 lcdc_write(sdev, LDBnBSIFR(splane->index), 0);
216 return 0;
217}
218
219static void shmob_drm_plane_destroy(struct drm_plane *plane)
220{
221 drm_plane_force_disable(plane);
222 drm_plane_cleanup(plane);
223}
224
225static const struct drm_plane_funcs shmob_drm_plane_funcs = {
226 .update_plane = shmob_drm_plane_update,
227 .disable_plane = shmob_drm_plane_disable,
228 .destroy = shmob_drm_plane_destroy,
229};
230
231static const uint32_t formats[] = {
232 DRM_FORMAT_RGB565,
233 DRM_FORMAT_RGB888,
234 DRM_FORMAT_ARGB8888,
235 DRM_FORMAT_NV12,
236 DRM_FORMAT_NV21,
237 DRM_FORMAT_NV16,
238 DRM_FORMAT_NV61,
239 DRM_FORMAT_NV24,
240 DRM_FORMAT_NV42,
241};
242
243int shmob_drm_plane_create(struct shmob_drm_device *sdev, unsigned int index)
244{
245 struct shmob_drm_plane *splane;
246 int ret;
247
248 splane = devm_kzalloc(sdev->dev, sizeof(*splane), GFP_KERNEL);
249 if (splane == NULL)
250 return -ENOMEM;
251
252 splane->index = index;
253 splane->alpha = 255;
254
255 ret = drm_plane_init(sdev->ddev, &splane->plane, 1,
256 &shmob_drm_plane_funcs, formats,
257 ARRAY_SIZE(formats), false);
258
259 return ret;
260}