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12#include <linux/export.h>
13#include <linux/of_graph.h>
14
15#include <drm/drm_atomic_helper.h>
16#include <drm/drm_bridge.h>
17#include <drm/drm_bridge_connector.h>
18#include <drm/drm_device.h>
19#include <drm/drm_edid.h>
20#include <drm/drm_probe_helper.h>
21#include <drm/drm_simple_kms_helper.h>
22
23#include "meson_registers.h"
24#include "meson_vclk.h"
25#include "meson_encoder_cvbs.h"
26
27
28#define HHI_VDAC_CNTL0 0x2F4
29#define HHI_VDAC_CNTL0_G12A 0x2EC
30#define HHI_VDAC_CNTL1 0x2F8
31#define HHI_VDAC_CNTL1_G12A 0x2F0
32
33struct meson_encoder_cvbs {
34 struct drm_encoder encoder;
35 struct drm_bridge bridge;
36 struct drm_bridge *next_bridge;
37 struct meson_drm *priv;
38};
39
40#define bridge_to_meson_encoder_cvbs(x) \
41 container_of(x, struct meson_encoder_cvbs, bridge)
42
43
44
45struct meson_cvbs_mode meson_cvbs_modes[MESON_CVBS_MODES_COUNT] = {
46 {
47 .enci = &meson_cvbs_enci_pal,
48 .mode = {
49 DRM_MODE("720x576i", DRM_MODE_TYPE_DRIVER, 13500,
50 720, 732, 795, 864, 0, 576, 580, 586, 625, 0,
51 DRM_MODE_FLAG_INTERLACE),
52 .picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
53 },
54 },
55 {
56 .enci = &meson_cvbs_enci_ntsc,
57 .mode = {
58 DRM_MODE("720x480i", DRM_MODE_TYPE_DRIVER, 13500,
59 720, 739, 801, 858, 0, 480, 488, 494, 525, 0,
60 DRM_MODE_FLAG_INTERLACE),
61 .picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
62 },
63 },
64};
65
66static const struct meson_cvbs_mode *
67meson_cvbs_get_mode(const struct drm_display_mode *req_mode)
68{
69 int i;
70
71 for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
72 struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
73
74 if (drm_mode_match(req_mode, &meson_mode->mode,
75 DRM_MODE_MATCH_TIMINGS |
76 DRM_MODE_MATCH_CLOCK |
77 DRM_MODE_MATCH_FLAGS |
78 DRM_MODE_MATCH_3D_FLAGS))
79 return meson_mode;
80 }
81
82 return NULL;
83}
84
85static int meson_encoder_cvbs_attach(struct drm_bridge *bridge,
86 enum drm_bridge_attach_flags flags)
87{
88 struct meson_encoder_cvbs *meson_encoder_cvbs =
89 bridge_to_meson_encoder_cvbs(bridge);
90
91 return drm_bridge_attach(bridge->encoder, meson_encoder_cvbs->next_bridge,
92 &meson_encoder_cvbs->bridge, flags);
93}
94
95static int meson_encoder_cvbs_get_modes(struct drm_bridge *bridge,
96 struct drm_connector *connector)
97{
98 struct meson_encoder_cvbs *meson_encoder_cvbs =
99 bridge_to_meson_encoder_cvbs(bridge);
100 struct meson_drm *priv = meson_encoder_cvbs->priv;
101 struct drm_display_mode *mode;
102 int i;
103
104 for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
105 struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
106
107 mode = drm_mode_duplicate(priv->drm, &meson_mode->mode);
108 if (!mode) {
109 dev_err(priv->dev, "Failed to create a new display mode\n");
110 return 0;
111 }
112
113 drm_mode_probed_add(connector, mode);
114 }
115
116 return i;
117}
118
119static int meson_encoder_cvbs_mode_valid(struct drm_bridge *bridge,
120 const struct drm_display_info *display_info,
121 const struct drm_display_mode *mode)
122{
123 if (meson_cvbs_get_mode(mode))
124 return MODE_OK;
125
126 return MODE_BAD;
127}
128
129static int meson_encoder_cvbs_atomic_check(struct drm_bridge *bridge,
130 struct drm_bridge_state *bridge_state,
131 struct drm_crtc_state *crtc_state,
132 struct drm_connector_state *conn_state)
133{
134 if (meson_cvbs_get_mode(&crtc_state->mode))
135 return 0;
136
137 return -EINVAL;
138}
139
140static void meson_encoder_cvbs_atomic_enable(struct drm_bridge *bridge,
141 struct drm_bridge_state *bridge_state)
142{
143 struct meson_encoder_cvbs *encoder_cvbs = bridge_to_meson_encoder_cvbs(bridge);
144 struct drm_atomic_state *state = bridge_state->base.state;
145 struct meson_drm *priv = encoder_cvbs->priv;
146 const struct meson_cvbs_mode *meson_mode;
147 struct drm_connector_state *conn_state;
148 struct drm_crtc_state *crtc_state;
149 struct drm_connector *connector;
150
151 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
152 if (WARN_ON(!connector))
153 return;
154
155 conn_state = drm_atomic_get_new_connector_state(state, connector);
156 if (WARN_ON(!conn_state))
157 return;
158
159 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
160 if (WARN_ON(!crtc_state))
161 return;
162
163 meson_mode = meson_cvbs_get_mode(&crtc_state->adjusted_mode);
164 if (WARN_ON(!meson_mode))
165 return;
166
167 meson_venci_cvbs_mode_set(priv, meson_mode->enci);
168
169
170 meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS,
171 MESON_VCLK_CVBS, MESON_VCLK_CVBS,
172 MESON_VCLK_CVBS, MESON_VCLK_CVBS,
173 true);
174
175
176 writel_bits_relaxed(VENC_VDAC_SEL_ATV_DMD, 0,
177 priv->io_base + _REG(VENC_VDAC_DACSEL0));
178
179 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXBB)) {
180 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1);
181 regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
182 } else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) ||
183 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL)) {
184 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001);
185 regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
186 } else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
187 regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0x906001);
188 regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0);
189 }
190}
191
192static void meson_encoder_cvbs_atomic_disable(struct drm_bridge *bridge,
193 struct drm_bridge_state *bridge_state)
194{
195 struct meson_encoder_cvbs *meson_encoder_cvbs =
196 bridge_to_meson_encoder_cvbs(bridge);
197 struct meson_drm *priv = meson_encoder_cvbs->priv;
198
199
200 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
201 regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0);
202 regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0);
203 } else {
204 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0);
205 regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8);
206 }
207}
208
209static const struct drm_bridge_funcs meson_encoder_cvbs_bridge_funcs = {
210 .attach = meson_encoder_cvbs_attach,
211 .mode_valid = meson_encoder_cvbs_mode_valid,
212 .get_modes = meson_encoder_cvbs_get_modes,
213 .atomic_enable = meson_encoder_cvbs_atomic_enable,
214 .atomic_disable = meson_encoder_cvbs_atomic_disable,
215 .atomic_check = meson_encoder_cvbs_atomic_check,
216 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
217 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
218 .atomic_reset = drm_atomic_helper_bridge_reset,
219};
220
221int meson_encoder_cvbs_init(struct meson_drm *priv)
222{
223 struct drm_device *drm = priv->drm;
224 struct meson_encoder_cvbs *meson_encoder_cvbs;
225 struct drm_connector *connector;
226 struct device_node *remote;
227 int ret;
228
229 meson_encoder_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_encoder_cvbs), GFP_KERNEL);
230 if (!meson_encoder_cvbs)
231 return -ENOMEM;
232
233
234 remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0);
235 if (!remote) {
236 dev_info(drm->dev, "CVBS Output connector not available\n");
237 return 0;
238 }
239
240 meson_encoder_cvbs->next_bridge = of_drm_find_bridge(remote);
241 if (!meson_encoder_cvbs->next_bridge) {
242 dev_err(priv->dev, "Failed to find CVBS Connector bridge\n");
243 return -EPROBE_DEFER;
244 }
245
246
247 meson_encoder_cvbs->bridge.funcs = &meson_encoder_cvbs_bridge_funcs;
248 meson_encoder_cvbs->bridge.of_node = priv->dev->of_node;
249 meson_encoder_cvbs->bridge.type = DRM_MODE_CONNECTOR_Composite;
250 meson_encoder_cvbs->bridge.ops = DRM_BRIDGE_OP_MODES;
251 meson_encoder_cvbs->bridge.interlace_allowed = true;
252
253 drm_bridge_add(&meson_encoder_cvbs->bridge);
254
255 meson_encoder_cvbs->priv = priv;
256
257
258 ret = drm_simple_encoder_init(priv->drm, &meson_encoder_cvbs->encoder,
259 DRM_MODE_ENCODER_TVDAC);
260 if (ret) {
261 dev_err(priv->dev, "Failed to init CVBS encoder: %d\n", ret);
262 return ret;
263 }
264
265 meson_encoder_cvbs->encoder.possible_crtcs = BIT(0);
266
267
268 ret = drm_bridge_attach(&meson_encoder_cvbs->encoder, &meson_encoder_cvbs->bridge, NULL,
269 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
270 if (ret) {
271 dev_err(priv->dev, "Failed to attach bridge: %d\n", ret);
272 return ret;
273 }
274
275
276 connector = drm_bridge_connector_init(priv->drm, &meson_encoder_cvbs->encoder);
277 if (IS_ERR(connector)) {
278 dev_err(priv->dev, "Unable to create CVBS bridge connector\n");
279 return PTR_ERR(connector);
280 }
281 drm_connector_attach_encoder(connector, &meson_encoder_cvbs->encoder);
282
283 return 0;
284}
285
