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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2016 BayLibre, SAS4 * Author: Neil Armstrong <narmstrong@baylibre.com>5 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.6 * Copyright (C) 2014 Endless Mobile7 *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 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/* Supported Modes */44 45struct 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 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 enum drm_mode_status120meson_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 130static 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 141static 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 193static 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 210static 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 222int 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 288void 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