1 /*
2 * Samsung TV Mixer driver
3 *
4 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
5 *
6 * Tomasz Stanislawski, <t.stanislaws@samsung.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
10 * by the Free Software Foundiation. either version 2 of the License,
11 * or (at your option) any later version
12 */
13
14 #include "mixer.h"
15
16 #include "regs-vp.h"
17
18 #include <media/videobuf2-dma-contig.h>
19
20 /* FORMAT DEFINITIONS */
21 static const struct mxr_format mxr_fmt_nv12 = {
22 .name = "NV12",
23 .fourcc = V4L2_PIX_FMT_NV12,
24 .colorspace = V4L2_COLORSPACE_JPEG,
25 .num_planes = 2,
26 .plane = {
27 { .width = 1, .height = 1, .size = 1 },
28 { .width = 2, .height = 2, .size = 2 },
29 },
30 .num_subframes = 1,
31 .cookie = VP_MODE_NV12 | VP_MODE_MEM_LINEAR,
32 };
33
34 static const struct mxr_format mxr_fmt_nv21 = {
35 .name = "NV21",
36 .fourcc = V4L2_PIX_FMT_NV21,
37 .colorspace = V4L2_COLORSPACE_JPEG,
38 .num_planes = 2,
39 .plane = {
40 { .width = 1, .height = 1, .size = 1 },
41 { .width = 2, .height = 2, .size = 2 },
42 },
43 .num_subframes = 1,
44 .cookie = VP_MODE_NV21 | VP_MODE_MEM_LINEAR,
45 };
46
47 static const struct mxr_format mxr_fmt_nv12m = {
48 .name = "NV12 (mplane)",
49 .fourcc = V4L2_PIX_FMT_NV12M,
50 .colorspace = V4L2_COLORSPACE_JPEG,
51 .num_planes = 2,
52 .plane = {
53 { .width = 1, .height = 1, .size = 1 },
54 { .width = 2, .height = 2, .size = 2 },
55 },
56 .num_subframes = 2,
57 .plane2subframe = {0, 1},
58 .cookie = VP_MODE_NV12 | VP_MODE_MEM_LINEAR,
59 };
60
61 static const struct mxr_format mxr_fmt_nv12mt = {
62 .name = "NV12 tiled (mplane)",
63 .fourcc = V4L2_PIX_FMT_NV12MT,
64 .colorspace = V4L2_COLORSPACE_JPEG,
65 .num_planes = 2,
66 .plane = {
67 { .width = 128, .height = 32, .size = 4096 },
68 { .width = 128, .height = 32, .size = 2048 },
69 },
70 .num_subframes = 2,
71 .plane2subframe = {0, 1},
72 .cookie = VP_MODE_NV12 | VP_MODE_MEM_TILED,
73 };
74
75 static const struct mxr_format *mxr_video_format[] = {
76 &mxr_fmt_nv12,
77 &mxr_fmt_nv21,
78 &mxr_fmt_nv12m,
79 &mxr_fmt_nv12mt,
80 };
81
82 /* AUXILIARY CALLBACKS */
83
mxr_vp_layer_release(struct mxr_layer * layer)84 static void mxr_vp_layer_release(struct mxr_layer *layer)
85 {
86 mxr_base_layer_unregister(layer);
87 mxr_base_layer_release(layer);
88 }
89
mxr_vp_buffer_set(struct mxr_layer * layer,struct mxr_buffer * buf)90 static void mxr_vp_buffer_set(struct mxr_layer *layer,
91 struct mxr_buffer *buf)
92 {
93 dma_addr_t luma_addr[2] = {0, 0};
94 dma_addr_t chroma_addr[2] = {0, 0};
95
96 if (buf == NULL) {
97 mxr_reg_vp_buffer(layer->mdev, luma_addr, chroma_addr);
98 return;
99 }
100 luma_addr[0] = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
101 if (layer->fmt->num_subframes == 2) {
102 chroma_addr[0] =
103 vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 1);
104 } else {
105 /* FIXME: mxr_get_plane_size compute integer division,
106 * which is slow and should not be performed in interrupt */
107 chroma_addr[0] = luma_addr[0] + mxr_get_plane_size(
108 &layer->fmt->plane[0], layer->geo.src.full_width,
109 layer->geo.src.full_height);
110 }
111 if (layer->fmt->cookie & VP_MODE_MEM_TILED) {
112 luma_addr[1] = luma_addr[0] + 0x40;
113 chroma_addr[1] = chroma_addr[0] + 0x40;
114 } else {
115 luma_addr[1] = luma_addr[0] + layer->geo.src.full_width;
116 chroma_addr[1] = chroma_addr[0];
117 }
118 mxr_reg_vp_buffer(layer->mdev, luma_addr, chroma_addr);
119 }
120
mxr_vp_stream_set(struct mxr_layer * layer,int en)121 static void mxr_vp_stream_set(struct mxr_layer *layer, int en)
122 {
123 mxr_reg_vp_layer_stream(layer->mdev, en);
124 }
125
mxr_vp_format_set(struct mxr_layer * layer)126 static void mxr_vp_format_set(struct mxr_layer *layer)
127 {
128 mxr_reg_vp_format(layer->mdev, layer->fmt, &layer->geo);
129 }
130
do_center(unsigned int center,unsigned int size,unsigned int upper,unsigned int flags)131 static inline unsigned int do_center(unsigned int center,
132 unsigned int size, unsigned int upper, unsigned int flags)
133 {
134 unsigned int lower;
135
136 if (flags & MXR_NO_OFFSET)
137 return 0;
138
139 lower = center - min(center, size / 2);
140 return min(lower, upper - size);
141 }
142
mxr_vp_fix_geometry(struct mxr_layer * layer,enum mxr_geometry_stage stage,unsigned long flags)143 static void mxr_vp_fix_geometry(struct mxr_layer *layer,
144 enum mxr_geometry_stage stage, unsigned long flags)
145 {
146 struct mxr_geometry *geo = &layer->geo;
147 struct mxr_crop *src = &geo->src;
148 struct mxr_crop *dst = &geo->dst;
149 unsigned long x_center, y_center;
150
151 switch (stage) {
152
153 case MXR_GEOMETRY_SINK: /* nothing to be fixed here */
154 case MXR_GEOMETRY_COMPOSE:
155 /* remember center of the area */
156 x_center = dst->x_offset + dst->width / 2;
157 y_center = dst->y_offset + dst->height / 2;
158
159 /* ensure that compose is reachable using 16x scaling */
160 dst->width = clamp(dst->width, 8U, 16 * src->full_width);
161 dst->height = clamp(dst->height, 1U, 16 * src->full_height);
162
163 /* setup offsets */
164 dst->x_offset = do_center(x_center, dst->width,
165 dst->full_width, flags);
166 dst->y_offset = do_center(y_center, dst->height,
167 dst->full_height, flags);
168 flags = 0; /* remove possible MXR_NO_OFFSET flag */
169 /* fall through */
170 case MXR_GEOMETRY_CROP:
171 /* remember center of the area */
172 x_center = src->x_offset + src->width / 2;
173 y_center = src->y_offset + src->height / 2;
174
175 /* ensure scaling is between 0.25x .. 16x */
176 src->width = clamp(src->width, round_up(dst->width / 16, 4),
177 dst->width * 4);
178 src->height = clamp(src->height, round_up(dst->height / 16, 4),
179 dst->height * 4);
180
181 /* hardware limits */
182 src->width = clamp(src->width, 32U, 2047U);
183 src->height = clamp(src->height, 4U, 2047U);
184
185 /* setup offsets */
186 src->x_offset = do_center(x_center, src->width,
187 src->full_width, flags);
188 src->y_offset = do_center(y_center, src->height,
189 src->full_height, flags);
190
191 /* setting scaling ratio */
192 geo->x_ratio = (src->width << 16) / dst->width;
193 geo->y_ratio = (src->height << 16) / dst->height;
194 /* fall through */
195
196 case MXR_GEOMETRY_SOURCE:
197 src->full_width = clamp(src->full_width,
198 ALIGN(src->width + src->x_offset, 8), 8192U);
199 src->full_height = clamp(src->full_height,
200 src->height + src->y_offset, 8192U);
201 }
202 }
203
204 /* PUBLIC API */
205
mxr_vp_layer_create(struct mxr_device * mdev,int idx)206 struct mxr_layer *mxr_vp_layer_create(struct mxr_device *mdev, int idx)
207 {
208 struct mxr_layer *layer;
209 int ret;
210 struct mxr_layer_ops ops = {
211 .release = mxr_vp_layer_release,
212 .buffer_set = mxr_vp_buffer_set,
213 .stream_set = mxr_vp_stream_set,
214 .format_set = mxr_vp_format_set,
215 .fix_geometry = mxr_vp_fix_geometry,
216 };
217 char name[32];
218
219 sprintf(name, "video%d", idx);
220
221 layer = mxr_base_layer_create(mdev, idx, name, &ops);
222 if (layer == NULL) {
223 mxr_err(mdev, "failed to initialize layer(%d) base\n", idx);
224 goto fail;
225 }
226
227 layer->fmt_array = mxr_video_format;
228 layer->fmt_array_size = ARRAY_SIZE(mxr_video_format);
229
230 ret = mxr_base_layer_register(layer);
231 if (ret)
232 goto fail_layer;
233
234 return layer;
235
236 fail_layer:
237 mxr_base_layer_release(layer);
238
239 fail:
240 return NULL;
241 }
242
243