Loading...
1// SPDX-License-Identifier: GPL-2.0+
2
3#include <linux/iosys-map.h>
4
5#include <drm/drm_atomic.h>
6#include <drm/drm_edid.h>
7#include <drm/drm_fourcc.h>
8#include <drm/drm_writeback.h>
9#include <drm/drm_probe_helper.h>
10#include <drm/drm_atomic_helper.h>
11#include <drm/drm_gem_framebuffer_helper.h>
12#include <drm/drm_gem_shmem_helper.h>
13
14#include "vkms_drv.h"
15#include "vkms_formats.h"
16
17static const u32 vkms_wb_formats[] = {
18 DRM_FORMAT_ARGB8888,
19 DRM_FORMAT_XRGB8888,
20 DRM_FORMAT_XRGB16161616,
21 DRM_FORMAT_ARGB16161616,
22 DRM_FORMAT_RGB565
23};
24
25static const struct drm_connector_funcs vkms_wb_connector_funcs = {
26 .fill_modes = drm_helper_probe_single_connector_modes,
27 .destroy = drm_connector_cleanup,
28 .reset = drm_atomic_helper_connector_reset,
29 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
30 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
31};
32
33static int vkms_wb_atomic_check(struct drm_connector *connector,
34 struct drm_atomic_state *state)
35{
36 struct drm_connector_state *conn_state =
37 drm_atomic_get_new_connector_state(state, connector);
38 struct drm_crtc_state *crtc_state;
39 struct drm_framebuffer *fb;
40 const struct drm_display_mode *mode;
41 int ret;
42
43 if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
44 return 0;
45
46 if (!conn_state->crtc)
47 return 0;
48
49 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
50 mode = &crtc_state->mode;
51
52 fb = conn_state->writeback_job->fb;
53 if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) {
54 DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n",
55 fb->width, fb->height);
56 return -EINVAL;
57 }
58
59 ret = drm_atomic_helper_check_wb_connector_state(connector, state);
60 if (ret < 0)
61 return ret;
62
63 return 0;
64}
65
66static int vkms_wb_connector_get_modes(struct drm_connector *connector)
67{
68 struct drm_device *dev = connector->dev;
69
70 return drm_add_modes_noedid(connector, dev->mode_config.max_width,
71 dev->mode_config.max_height);
72}
73
74static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector,
75 struct drm_writeback_job *job)
76{
77 struct vkms_writeback_job *vkmsjob;
78 int ret;
79
80 if (!job->fb)
81 return 0;
82
83 vkmsjob = kzalloc(sizeof(*vkmsjob), GFP_KERNEL);
84 if (!vkmsjob)
85 return -ENOMEM;
86
87 ret = drm_gem_fb_vmap(job->fb, vkmsjob->wb_frame_info.map, vkmsjob->data);
88 if (ret) {
89 DRM_ERROR("vmap failed: %d\n", ret);
90 goto err_kfree;
91 }
92
93 vkmsjob->wb_frame_info.fb = job->fb;
94 drm_framebuffer_get(vkmsjob->wb_frame_info.fb);
95
96 job->priv = vkmsjob;
97
98 return 0;
99
100err_kfree:
101 kfree(vkmsjob);
102 return ret;
103}
104
105static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
106 struct drm_writeback_job *job)
107{
108 struct vkms_writeback_job *vkmsjob = job->priv;
109 struct vkms_device *vkmsdev;
110
111 if (!job->fb)
112 return;
113
114 drm_gem_fb_vunmap(job->fb, vkmsjob->wb_frame_info.map);
115
116 drm_framebuffer_put(vkmsjob->wb_frame_info.fb);
117
118 vkmsdev = drm_device_to_vkms_device(job->fb->dev);
119 vkms_set_composer(&vkmsdev->output, false);
120 kfree(vkmsjob);
121}
122
123static void vkms_wb_atomic_commit(struct drm_connector *conn,
124 struct drm_atomic_state *state)
125{
126 struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
127 conn);
128 struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev);
129 struct vkms_output *output = &vkmsdev->output;
130 struct drm_writeback_connector *wb_conn = &output->wb_connector;
131 struct drm_connector_state *conn_state = wb_conn->base.state;
132 struct vkms_crtc_state *crtc_state = output->composer_state;
133 struct drm_framebuffer *fb = connector_state->writeback_job->fb;
134 u16 crtc_height = crtc_state->base.mode.vdisplay;
135 u16 crtc_width = crtc_state->base.mode.hdisplay;
136 struct vkms_writeback_job *active_wb;
137 struct vkms_frame_info *wb_frame_info;
138 u32 wb_format = fb->format->format;
139
140 if (!conn_state)
141 return;
142
143 vkms_set_composer(&vkmsdev->output, true);
144
145 active_wb = conn_state->writeback_job->priv;
146 wb_frame_info = &active_wb->wb_frame_info;
147
148 spin_lock_irq(&output->composer_lock);
149 crtc_state->active_writeback = active_wb;
150 crtc_state->wb_pending = true;
151 spin_unlock_irq(&output->composer_lock);
152
153 wb_frame_info->offset = fb->offsets[0];
154 wb_frame_info->pitch = fb->pitches[0];
155 wb_frame_info->cpp = fb->format->cpp[0];
156
157 drm_writeback_queue_job(wb_conn, connector_state);
158 active_wb->pixel_write = get_pixel_write_function(wb_format);
159 drm_rect_init(&wb_frame_info->src, 0, 0, crtc_width, crtc_height);
160 drm_rect_init(&wb_frame_info->dst, 0, 0, crtc_width, crtc_height);
161}
162
163static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
164 .get_modes = vkms_wb_connector_get_modes,
165 .prepare_writeback_job = vkms_wb_prepare_job,
166 .cleanup_writeback_job = vkms_wb_cleanup_job,
167 .atomic_commit = vkms_wb_atomic_commit,
168 .atomic_check = vkms_wb_atomic_check,
169};
170
171int vkms_enable_writeback_connector(struct vkms_device *vkmsdev)
172{
173 struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector;
174
175 drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs);
176
177 return drm_writeback_connector_init(&vkmsdev->drm, wb,
178 &vkms_wb_connector_funcs,
179 NULL,
180 vkms_wb_formats,
181 ARRAY_SIZE(vkms_wb_formats),
182 1);
183}
1// SPDX-License-Identifier: GPL-2.0+
2
3#include <linux/iosys-map.h>
4
5#include <drm/drm_atomic.h>
6#include <drm/drm_edid.h>
7#include <drm/drm_fourcc.h>
8#include <drm/drm_writeback.h>
9#include <drm/drm_probe_helper.h>
10#include <drm/drm_atomic_helper.h>
11#include <drm/drm_gem_framebuffer_helper.h>
12#include <drm/drm_gem_shmem_helper.h>
13
14#include "vkms_drv.h"
15#include "vkms_formats.h"
16
17static const u32 vkms_wb_formats[] = {
18 DRM_FORMAT_XRGB8888,
19 DRM_FORMAT_XRGB16161616,
20 DRM_FORMAT_ARGB16161616,
21 DRM_FORMAT_RGB565
22};
23
24static const struct drm_connector_funcs vkms_wb_connector_funcs = {
25 .fill_modes = drm_helper_probe_single_connector_modes,
26 .destroy = drm_connector_cleanup,
27 .reset = drm_atomic_helper_connector_reset,
28 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
29 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
30};
31
32static int vkms_wb_encoder_atomic_check(struct drm_encoder *encoder,
33 struct drm_crtc_state *crtc_state,
34 struct drm_connector_state *conn_state)
35{
36 struct drm_framebuffer *fb;
37 const struct drm_display_mode *mode = &crtc_state->mode;
38 int ret;
39
40 if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
41 return 0;
42
43 fb = conn_state->writeback_job->fb;
44 if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) {
45 DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n",
46 fb->width, fb->height);
47 return -EINVAL;
48 }
49
50 ret = drm_atomic_helper_check_wb_encoder_state(encoder, conn_state);
51 if (ret < 0)
52 return ret;
53
54 return 0;
55}
56
57static const struct drm_encoder_helper_funcs vkms_wb_encoder_helper_funcs = {
58 .atomic_check = vkms_wb_encoder_atomic_check,
59};
60
61static int vkms_wb_connector_get_modes(struct drm_connector *connector)
62{
63 struct drm_device *dev = connector->dev;
64
65 return drm_add_modes_noedid(connector, dev->mode_config.max_width,
66 dev->mode_config.max_height);
67}
68
69static int vkms_wb_prepare_job(struct drm_writeback_connector *wb_connector,
70 struct drm_writeback_job *job)
71{
72 struct vkms_writeback_job *vkmsjob;
73 int ret;
74
75 if (!job->fb)
76 return 0;
77
78 vkmsjob = kzalloc(sizeof(*vkmsjob), GFP_KERNEL);
79 if (!vkmsjob)
80 return -ENOMEM;
81
82 ret = drm_gem_fb_vmap(job->fb, vkmsjob->wb_frame_info.map, vkmsjob->data);
83 if (ret) {
84 DRM_ERROR("vmap failed: %d\n", ret);
85 goto err_kfree;
86 }
87
88 vkmsjob->wb_frame_info.fb = job->fb;
89 drm_framebuffer_get(vkmsjob->wb_frame_info.fb);
90
91 job->priv = vkmsjob;
92
93 return 0;
94
95err_kfree:
96 kfree(vkmsjob);
97 return ret;
98}
99
100static void vkms_wb_cleanup_job(struct drm_writeback_connector *connector,
101 struct drm_writeback_job *job)
102{
103 struct vkms_writeback_job *vkmsjob = job->priv;
104 struct vkms_device *vkmsdev;
105
106 if (!job->fb)
107 return;
108
109 drm_gem_fb_vunmap(job->fb, vkmsjob->wb_frame_info.map);
110
111 drm_framebuffer_put(vkmsjob->wb_frame_info.fb);
112
113 vkmsdev = drm_device_to_vkms_device(job->fb->dev);
114 vkms_set_composer(&vkmsdev->output, false);
115 kfree(vkmsjob);
116}
117
118static void vkms_wb_atomic_commit(struct drm_connector *conn,
119 struct drm_atomic_state *state)
120{
121 struct drm_connector_state *connector_state = drm_atomic_get_new_connector_state(state,
122 conn);
123 struct vkms_device *vkmsdev = drm_device_to_vkms_device(conn->dev);
124 struct vkms_output *output = &vkmsdev->output;
125 struct drm_writeback_connector *wb_conn = &output->wb_connector;
126 struct drm_connector_state *conn_state = wb_conn->base.state;
127 struct vkms_crtc_state *crtc_state = output->composer_state;
128 struct drm_framebuffer *fb = connector_state->writeback_job->fb;
129 u16 crtc_height = crtc_state->base.crtc->mode.vdisplay;
130 u16 crtc_width = crtc_state->base.crtc->mode.hdisplay;
131 struct vkms_writeback_job *active_wb;
132 struct vkms_frame_info *wb_frame_info;
133 u32 wb_format = fb->format->format;
134
135 if (!conn_state)
136 return;
137
138 vkms_set_composer(&vkmsdev->output, true);
139
140 active_wb = conn_state->writeback_job->priv;
141 wb_frame_info = &active_wb->wb_frame_info;
142
143 spin_lock_irq(&output->composer_lock);
144 crtc_state->active_writeback = active_wb;
145 wb_frame_info->offset = fb->offsets[0];
146 wb_frame_info->pitch = fb->pitches[0];
147 wb_frame_info->cpp = fb->format->cpp[0];
148 crtc_state->wb_pending = true;
149 spin_unlock_irq(&output->composer_lock);
150 drm_writeback_queue_job(wb_conn, connector_state);
151 active_wb->wb_write = get_line_to_frame_function(wb_format);
152 drm_rect_init(&wb_frame_info->src, 0, 0, crtc_width, crtc_height);
153 drm_rect_init(&wb_frame_info->dst, 0, 0, crtc_width, crtc_height);
154}
155
156static const struct drm_connector_helper_funcs vkms_wb_conn_helper_funcs = {
157 .get_modes = vkms_wb_connector_get_modes,
158 .prepare_writeback_job = vkms_wb_prepare_job,
159 .cleanup_writeback_job = vkms_wb_cleanup_job,
160 .atomic_commit = vkms_wb_atomic_commit,
161};
162
163int vkms_enable_writeback_connector(struct vkms_device *vkmsdev)
164{
165 struct drm_writeback_connector *wb = &vkmsdev->output.wb_connector;
166
167 drm_connector_helper_add(&wb->base, &vkms_wb_conn_helper_funcs);
168
169 return drm_writeback_connector_init(&vkmsdev->drm, wb,
170 &vkms_wb_connector_funcs,
171 &vkms_wb_encoder_helper_funcs,
172 vkms_wb_formats,
173 ARRAY_SIZE(vkms_wb_formats),
174 1);
175}