1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
// SPDX-License-Identifier: GPL-2.0
/*
* rcar_du_writeback.c -- R-Car Display Unit Writeback Support
*
* Copyright (C) 2019 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_device.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_writeback.h>
#include "rcar_du_crtc.h"
#include "rcar_du_drv.h"
#include "rcar_du_kms.h"
/**
* struct rcar_du_wb_conn_state - Driver-specific writeback connector state
* @state: base DRM connector state
* @format: format of the writeback framebuffer
*/
struct rcar_du_wb_conn_state {
struct drm_connector_state state;
const struct rcar_du_format_info *format;
};
#define to_rcar_wb_conn_state(s) \
container_of(s, struct rcar_du_wb_conn_state, state)
/**
* struct rcar_du_wb_job - Driver-private data for writeback jobs
* @sg_tables: scatter-gather tables for the framebuffer memory
*/
struct rcar_du_wb_job {
struct sg_table sg_tables[3];
};
static int rcar_du_wb_conn_get_modes(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
return drm_add_modes_noedid(connector, dev->mode_config.max_width,
dev->mode_config.max_height);
}
static int rcar_du_wb_prepare_job(struct drm_writeback_connector *connector,
struct drm_writeback_job *job)
{
struct rcar_du_crtc *rcrtc = wb_to_rcar_crtc(connector);
struct rcar_du_wb_job *rjob;
int ret;
if (!job->fb)
return 0;
rjob = kzalloc(sizeof(*rjob), GFP_KERNEL);
if (!rjob)
return -ENOMEM;
/* Map the framebuffer to the VSP. */
ret = rcar_du_vsp_map_fb(rcrtc->vsp, job->fb, rjob->sg_tables);
if (ret < 0) {
kfree(rjob);
return ret;
}
job->priv = rjob;
return 0;
}
static void rcar_du_wb_cleanup_job(struct drm_writeback_connector *connector,
struct drm_writeback_job *job)
{
struct rcar_du_crtc *rcrtc = wb_to_rcar_crtc(connector);
struct rcar_du_wb_job *rjob = job->priv;
if (!job->fb)
return;
rcar_du_vsp_unmap_fb(rcrtc->vsp, job->fb, rjob->sg_tables);
kfree(rjob);
}
static const struct drm_connector_helper_funcs rcar_du_wb_conn_helper_funcs = {
.get_modes = rcar_du_wb_conn_get_modes,
.prepare_writeback_job = rcar_du_wb_prepare_job,
.cleanup_writeback_job = rcar_du_wb_cleanup_job,
};
static struct drm_connector_state *
rcar_du_wb_conn_duplicate_state(struct drm_connector *connector)
{
struct rcar_du_wb_conn_state *copy;
if (WARN_ON(!connector->state))
return NULL;
copy = kzalloc(sizeof(*copy), GFP_KERNEL);
if (!copy)
return NULL;
__drm_atomic_helper_connector_duplicate_state(connector, ©->state);
return ©->state;
}
static void rcar_du_wb_conn_destroy_state(struct drm_connector *connector,
struct drm_connector_state *state)
{
__drm_atomic_helper_connector_destroy_state(state);
kfree(to_rcar_wb_conn_state(state));
}
static void rcar_du_wb_conn_reset(struct drm_connector *connector)
{
struct rcar_du_wb_conn_state *state;
if (connector->state) {
rcar_du_wb_conn_destroy_state(connector, connector->state);
connector->state = NULL;
}
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (state == NULL)
return;
__drm_atomic_helper_connector_reset(connector, &state->state);
}
static const struct drm_connector_funcs rcar_du_wb_conn_funcs = {
.reset = rcar_du_wb_conn_reset,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.atomic_duplicate_state = rcar_du_wb_conn_duplicate_state,
.atomic_destroy_state = rcar_du_wb_conn_destroy_state,
};
static int rcar_du_wb_enc_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct rcar_du_wb_conn_state *wb_state =
to_rcar_wb_conn_state(conn_state);
const struct drm_display_mode *mode = &crtc_state->mode;
struct drm_device *dev = encoder->dev;
struct drm_framebuffer *fb;
if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
return 0;
fb = conn_state->writeback_job->fb;
/*
* Verify that the framebuffer format is supported and that its size
* matches the current mode.
*/
if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) {
dev_dbg(dev->dev, "%s: invalid framebuffer size %ux%u\n",
__func__, fb->width, fb->height);
return -EINVAL;
}
wb_state->format = rcar_du_format_info(fb->format->format);
if (wb_state->format == NULL) {
dev_dbg(dev->dev, "%s: unsupported format %08x\n", __func__,
fb->format->format);
return -EINVAL;
}
return 0;
}
static const struct drm_encoder_helper_funcs rcar_du_wb_enc_helper_funcs = {
.atomic_check = rcar_du_wb_enc_atomic_check,
};
/*
* Only RGB formats are currently supported as the VSP outputs RGB to the DU
* and can't convert to YUV separately for writeback.
*/
static const u32 writeback_formats[] = {
DRM_FORMAT_RGB332,
DRM_FORMAT_ARGB4444,
DRM_FORMAT_XRGB4444,
DRM_FORMAT_ARGB1555,
DRM_FORMAT_XRGB1555,
DRM_FORMAT_RGB565,
DRM_FORMAT_BGR888,
DRM_FORMAT_RGB888,
DRM_FORMAT_BGRA8888,
DRM_FORMAT_BGRX8888,
DRM_FORMAT_ARGB8888,
DRM_FORMAT_XRGB8888,
};
int rcar_du_writeback_init(struct rcar_du_device *rcdu,
struct rcar_du_crtc *rcrtc)
{
struct drm_writeback_connector *wb_conn = &rcrtc->writeback;
wb_conn->encoder.possible_crtcs = 1 << drm_crtc_index(&rcrtc->crtc);
drm_connector_helper_add(&wb_conn->base,
&rcar_du_wb_conn_helper_funcs);
return drm_writeback_connector_init(rcdu->ddev, wb_conn,
&rcar_du_wb_conn_funcs,
&rcar_du_wb_enc_helper_funcs,
writeback_formats,
ARRAY_SIZE(writeback_formats));
}
void rcar_du_writeback_setup(struct rcar_du_crtc *rcrtc,
struct vsp1_du_writeback_config *cfg)
{
struct rcar_du_wb_conn_state *wb_state;
struct drm_connector_state *state;
struct rcar_du_wb_job *rjob;
struct drm_framebuffer *fb;
unsigned int i;
state = rcrtc->writeback.base.state;
if (!state || !state->writeback_job || !state->writeback_job->fb)
return;
fb = state->writeback_job->fb;
rjob = state->writeback_job->priv;
wb_state = to_rcar_wb_conn_state(state);
cfg->pixelformat = wb_state->format->v4l2;
cfg->pitch = fb->pitches[0];
for (i = 0; i < wb_state->format->planes; ++i)
cfg->mem[i] = sg_dma_address(rjob->sg_tables[i].sgl)
+ fb->offsets[i];
drm_writeback_queue_job(&rcrtc->writeback, state);
}
void rcar_du_writeback_complete(struct rcar_du_crtc *rcrtc)
{
drm_writeback_signal_completion(&rcrtc->writeback, 0);
}
|