1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2016 BayLibre, SAS 4 * Author: Neil Armstrong <narmstrong@baylibre.com> 5 * Copyright (C) 2015 Amlogic, Inc. All rights reserved. 6 * Copyright (C) 2014 Endless Mobile 7 * 8 * Written by: 9 * Jasper St. Pierre <jstpierre@mecheye.net> 10 */ 11 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 /* HHI VDAC Registers */ 28 #define HHI_VDAC_CNTL0 0x2F4 /* 0xbd offset in data sheet */ 29 #define HHI_VDAC_CNTL0_G12A 0x2EC /* 0xbd offset in data sheet */ 30 #define HHI_VDAC_CNTL1 0x2F8 /* 0xbe offset in data sheet */ 31 #define HHI_VDAC_CNTL1_G12A 0x2F0 /* 0xbe offset in data sheet */ 32 33 struct 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 /* Supported Modes */ 44 45 struct meson_cvbs_mode meson_cvbs_modes[MESON_CVBS_MODES_COUNT] = { 46 { /* PAL */ 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 { /* NTSC */ 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 66 static const struct meson_cvbs_mode * 67 meson_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 85 static 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 95 static 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 } 118 119 static enum drm_mode_status 120 meson_encoder_cvbs_mode_valid(struct drm_bridge *bridge, 121 const struct drm_display_info *display_info, 122 const struct drm_display_mode *mode) 123 { 124 if (meson_cvbs_get_mode(mode)) 125 return MODE_OK; 126 127 return MODE_BAD; 128 } 129 130 static int meson_encoder_cvbs_atomic_check(struct drm_bridge *bridge, 131 struct drm_bridge_state *bridge_state, 132 struct drm_crtc_state *crtc_state, 133 struct drm_connector_state *conn_state) 134 { 135 if (meson_cvbs_get_mode(&crtc_state->mode)) 136 return 0; 137 138 return -EINVAL; 139 } 140 141 static void meson_encoder_cvbs_atomic_enable(struct drm_bridge *bridge, 142 struct drm_bridge_state *bridge_state) 143 { 144 struct meson_encoder_cvbs *encoder_cvbs = bridge_to_meson_encoder_cvbs(bridge); 145 struct drm_atomic_state *state = bridge_state->base.state; 146 struct meson_drm *priv = encoder_cvbs->priv; 147 const struct meson_cvbs_mode *meson_mode; 148 struct drm_connector_state *conn_state; 149 struct drm_crtc_state *crtc_state; 150 struct drm_connector *connector; 151 152 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder); 153 if (WARN_ON(!connector)) 154 return; 155 156 conn_state = drm_atomic_get_new_connector_state(state, connector); 157 if (WARN_ON(!conn_state)) 158 return; 159 160 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); 161 if (WARN_ON(!crtc_state)) 162 return; 163 164 meson_mode = meson_cvbs_get_mode(&crtc_state->adjusted_mode); 165 if (WARN_ON(!meson_mode)) 166 return; 167 168 meson_venci_cvbs_mode_set(priv, meson_mode->enci); 169 170 /* Setup 27MHz vclk2 for ENCI and VDAC */ 171 meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS, 172 MESON_VCLK_CVBS, MESON_VCLK_CVBS, 173 MESON_VCLK_CVBS, MESON_VCLK_CVBS, 174 true); 175 176 /* VDAC0 source is not from ATV */ 177 writel_bits_relaxed(VENC_VDAC_SEL_ATV_DMD, 0, 178 priv->io_base + _REG(VENC_VDAC_DACSEL0)); 179 180 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXBB)) { 181 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1); 182 regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0); 183 } else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) || 184 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL)) { 185 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001); 186 regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0); 187 } else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) { 188 regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0x906001); 189 regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0); 190 } 191 } 192 193 static void meson_encoder_cvbs_atomic_disable(struct drm_bridge *bridge, 194 struct drm_bridge_state *bridge_state) 195 { 196 struct meson_encoder_cvbs *meson_encoder_cvbs = 197 bridge_to_meson_encoder_cvbs(bridge); 198 struct meson_drm *priv = meson_encoder_cvbs->priv; 199 200 /* Disable CVBS VDAC */ 201 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) { 202 regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0); 203 regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0); 204 } else { 205 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0); 206 regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8); 207 } 208 } 209 210 static const struct drm_bridge_funcs meson_encoder_cvbs_bridge_funcs = { 211 .attach = meson_encoder_cvbs_attach, 212 .mode_valid = meson_encoder_cvbs_mode_valid, 213 .get_modes = meson_encoder_cvbs_get_modes, 214 .atomic_enable = meson_encoder_cvbs_atomic_enable, 215 .atomic_disable = meson_encoder_cvbs_atomic_disable, 216 .atomic_check = meson_encoder_cvbs_atomic_check, 217 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 218 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 219 .atomic_reset = drm_atomic_helper_bridge_reset, 220 }; 221 222 int meson_encoder_cvbs_probe(struct meson_drm *priv) 223 { 224 struct drm_device *drm = priv->drm; 225 struct meson_encoder_cvbs *meson_encoder_cvbs; 226 struct drm_connector *connector; 227 struct device_node *remote; 228 int ret; 229 230 meson_encoder_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_encoder_cvbs), GFP_KERNEL); 231 if (!meson_encoder_cvbs) 232 return -ENOMEM; 233 234 /* CVBS Connector Bridge */ 235 remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0); 236 if (!remote) { 237 dev_info(drm->dev, "CVBS Output connector not available\n"); 238 return 0; 239 } 240 241 meson_encoder_cvbs->next_bridge = of_drm_find_bridge(remote); 242 of_node_put(remote); 243 if (!meson_encoder_cvbs->next_bridge) 244 return dev_err_probe(priv->dev, -EPROBE_DEFER, 245 "Failed to find CVBS Connector bridge\n"); 246 247 /* CVBS Encoder Bridge */ 248 meson_encoder_cvbs->bridge.funcs = &meson_encoder_cvbs_bridge_funcs; 249 meson_encoder_cvbs->bridge.of_node = priv->dev->of_node; 250 meson_encoder_cvbs->bridge.type = DRM_MODE_CONNECTOR_Composite; 251 meson_encoder_cvbs->bridge.ops = DRM_BRIDGE_OP_MODES; 252 meson_encoder_cvbs->bridge.interlace_allowed = true; 253 254 drm_bridge_add(&meson_encoder_cvbs->bridge); 255 256 meson_encoder_cvbs->priv = priv; 257 258 /* Encoder */ 259 ret = drm_simple_encoder_init(priv->drm, &meson_encoder_cvbs->encoder, 260 DRM_MODE_ENCODER_TVDAC); 261 if (ret) 262 return dev_err_probe(priv->dev, ret, 263 "Failed to init CVBS encoder\n"); 264 265 meson_encoder_cvbs->encoder.possible_crtcs = BIT(0); 266 267 /* Attach CVBS Encoder Bridge to Encoder */ 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 /* Initialize & attach Bridge Connector */ 276 connector = drm_bridge_connector_init(priv->drm, &meson_encoder_cvbs->encoder); 277 if (IS_ERR(connector)) 278 return dev_err_probe(priv->dev, PTR_ERR(connector), 279 "Unable to create CVBS bridge connector\n"); 280 281 drm_connector_attach_encoder(connector, &meson_encoder_cvbs->encoder); 282 283 priv->encoders[MESON_ENC_CVBS] = meson_encoder_cvbs; 284 285 return 0; 286 } 287 288 void meson_encoder_cvbs_remove(struct meson_drm *priv) 289 { 290 struct meson_encoder_cvbs *meson_encoder_cvbs; 291 292 if (priv->encoders[MESON_ENC_CVBS]) { 293 meson_encoder_cvbs = priv->encoders[MESON_ENC_CVBS]; 294 drm_bridge_remove(&meson_encoder_cvbs->bridge); 295 } 296 } 297