1 /* $NetBSD: imx6_dwhdmi.c,v 1.4 2021/12/19 11:25:39 riastradh Exp $ */ 2 /*- 3 * Copyright (c) 2020 Genetec Corporation. All rights reserved. 4 * Written by Hashimoto Kenichi for Genetec Corporation. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: imx6_dwhdmi.c,v 1.4 2021/12/19 11:25:39 riastradh Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/bus.h> 33 #include <sys/device.h> 34 #include <sys/intr.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/conf.h> 38 39 #include <drm/drm_crtc_helper.h> 40 41 #include <dev/fdt/fdtvar.h> 42 #include <dev/fdt/fdt_port.h> 43 #include <dev/fdt/syscon.h> 44 45 #include <dev/ic/dw_hdmi.h> 46 47 static const struct dwhdmi_mpll_config imx6_dwhdmi_mpll_config[] = { 48 { 45250, 0x01e0, 0x0000, 0x091c }, 49 { 92500, 0x0072, 0x0001, 0x06dc }, 50 { 148500, 0x0051, 0x0002, 0x091c }, 51 { 216000, 0x00a0, 0x000a, 0x06dc }, 52 { 0, 0x0000, 0x0000, 0x0000 }, 53 }; 54 55 static const struct dwhdmi_phy_config imx6_dwhdmi_phy_config[] = { 56 { 216000, 0x800d, 0x000a, 0x01ad }, 57 { 0, 0x0000, 0x0000, 0x0000 } 58 }; 59 60 enum { 61 DWHDMI_PORT_INPUT = 0, 62 DWHDMI_PORT_OUTPUT = 1, 63 }; 64 65 static const struct device_compatible_entry compat_data[] = { 66 { .compat = "fsl,imx6dl-hdmi" }, 67 { .compat = "fsl,imx6q-hdmi" }, 68 DEVICE_COMPAT_EOL 69 }; 70 71 struct imx6_dwhdmi_softc { 72 struct dwhdmi_softc sc_base; 73 int sc_phandle; 74 75 struct fdt_device_ports sc_ports; 76 struct drm_display_mode sc_curmode; 77 struct drm_encoder sc_encoder; 78 79 bool sc_activated; 80 }; 81 82 #define to_imx6_dwhdmi_softc(x) container_of(x, struct imx6_dwhdmi_softc, sc_base) 83 #define to_imx6_dwhdmi_encoder(x) container_of(x, struct imx6_dwhdmi_softc, sc_encoder) 84 85 static bool 86 imx6_dwhdmi_encoder_mode_fixup(struct drm_encoder *encoder, 87 const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) 88 { 89 return true; 90 } 91 92 static void 93 imx6_dwhdmi_encoder_mode_set(struct drm_encoder *encoder, 94 struct drm_display_mode *mode, struct drm_display_mode *adjusted) 95 { 96 } 97 98 static void 99 imx6_dwhdmi_encoder_enable(struct drm_encoder *encoder) 100 { 101 } 102 103 static void 104 imx6_dwhdmi_encoder_disable(struct drm_encoder *encoder) 105 { 106 } 107 108 static void 109 imx6_dwhdmi_encoder_prepare(struct drm_encoder *encoder) 110 { 111 } 112 113 static void 114 imx6_dwhdmi_encoder_commit(struct drm_encoder *encoder) 115 { 116 } 117 118 static const struct drm_encoder_funcs imx6_dwhdmi_encoder_funcs = { 119 .destroy = drm_encoder_cleanup, 120 }; 121 122 static const struct drm_encoder_helper_funcs imx6_dwhdmi_encoder_helper_funcs = { 123 .prepare = imx6_dwhdmi_encoder_prepare, 124 .mode_fixup = imx6_dwhdmi_encoder_mode_fixup, 125 .mode_set = imx6_dwhdmi_encoder_mode_set, 126 .enable = imx6_dwhdmi_encoder_enable, 127 .disable = imx6_dwhdmi_encoder_disable, 128 .commit = imx6_dwhdmi_encoder_commit, 129 }; 130 131 static int 132 imx6_dwhdmi_ep_activate(device_t dev, struct fdt_endpoint *ep, bool activate) 133 { 134 struct imx6_dwhdmi_softc * const sc = device_private(dev); 135 struct fdt_endpoint *in_ep = fdt_endpoint_remote(ep); 136 struct fdt_endpoint *out_ep, *out_rep; 137 struct drm_crtc *crtc; 138 int error; 139 140 if (sc->sc_activated != false) { 141 return 0; 142 } 143 144 if (!activate) 145 return EINVAL; 146 147 if (fdt_endpoint_port_index(ep) != DWHDMI_PORT_INPUT) 148 return EINVAL; 149 150 switch (fdt_endpoint_type(in_ep)) { 151 case EP_DRM_CRTC: 152 crtc = fdt_endpoint_get_data(in_ep); 153 break; 154 default: 155 crtc = NULL; 156 break; 157 } 158 159 if (crtc == NULL) 160 return EINVAL; 161 162 sc->sc_encoder.possible_crtcs = 3; // 1U << drm_crtc_index(crtc); /* XXX */ 163 drm_encoder_init(crtc->dev, &sc->sc_encoder, &imx6_dwhdmi_encoder_funcs, 164 DRM_MODE_ENCODER_TMDS, NULL); 165 drm_encoder_helper_add(&sc->sc_encoder, &imx6_dwhdmi_encoder_helper_funcs); 166 167 sc->sc_base.sc_connector.base.connector_type = DRM_MODE_CONNECTOR_HDMIA; 168 error = dwhdmi_bind(&sc->sc_base, &sc->sc_encoder); 169 if (error != 0) 170 return error; 171 sc->sc_activated = true; 172 173 out_ep = fdt_endpoint_get_from_index(&sc->sc_ports, DWHDMI_PORT_OUTPUT, 0); 174 if (out_ep != NULL) { 175 /* Ignore downstream connectors, we have our own. */ 176 out_rep = fdt_endpoint_remote(out_ep); 177 if (out_rep != NULL && fdt_endpoint_type(out_rep) == EP_DRM_CONNECTOR) 178 return 0; 179 180 error = fdt_endpoint_activate(out_ep, activate); 181 if (error != 0) 182 return error; 183 } 184 185 return 0; 186 } 187 188 static void * 189 imx6_dwhdmi_ep_get_data(device_t dev, struct fdt_endpoint *ep) 190 { 191 struct imx6_dwhdmi_softc * const sc = device_private(dev); 192 193 return &sc->sc_encoder; 194 } 195 196 static audio_dai_tag_t 197 imx6_dwhdmi_dai_get_tag(device_t dev, const void *data, size_t len) 198 { 199 struct imx6_dwhdmi_softc * const sc = device_private(dev); 200 201 if (len != 4) 202 return NULL; 203 204 return &sc->sc_base.sc_dai; 205 } 206 207 static struct fdtbus_dai_controller_func imx6_dwhdmi_dai_funcs = { 208 .get_tag = imx6_dwhdmi_dai_get_tag 209 }; 210 211 static int 212 imx6_dwhdmi_match(device_t parent, cfdata_t cf, void *aux) 213 { 214 struct fdt_attach_args * const faa = aux; 215 216 return of_compatible_match(faa->faa_phandle, compat_data); 217 } 218 219 static void 220 imx6_dwhdmi_attach(device_t parent, device_t self, void *aux) 221 { 222 struct imx6_dwhdmi_softc * const sc = device_private(self); 223 struct fdt_attach_args * const faa = aux; 224 const int phandle = faa->faa_phandle; 225 bus_addr_t addr; 226 bus_size_t size; 227 228 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 229 aprint_error(": couldn't get registers\n"); 230 return; 231 } 232 233 /* Required */ 234 if (fdtbus_clock_enable(phandle, "iahb", true) != 0) { 235 aprint_error(": couldn't enable iahb clock\n"); 236 return; 237 } 238 239 /* Required */ 240 if (fdtbus_clock_enable(phandle, "isfr", true) != 0) { 241 aprint_error(": couldn't enable isfr clock\n"); 242 return; 243 } 244 245 sc->sc_base.sc_dev = self; 246 sc->sc_base.sc_reg_width = 1; 247 sc->sc_base.sc_bst = faa->faa_bst; 248 if (bus_space_map(sc->sc_base.sc_bst, addr, size, 0, &sc->sc_base.sc_bsh) != 0) { 249 aprint_error(": couldn't map registers\n"); 250 return; 251 } 252 sc->sc_phandle = faa->faa_phandle; 253 254 aprint_naive("\n"); 255 aprint_normal(": HDMI TX\n"); 256 257 sc->sc_base.sc_ic = fdtbus_i2c_acquire(phandle, "ddc-i2c-bus"); 258 if (of_hasprop(phandle, "ddc-i2c-bus") && sc->sc_base.sc_ic == NULL) { 259 aprint_error_dev(self, "couldn't find external I2C master\n"); 260 return; 261 } 262 263 sc->sc_base.sc_flags |= DWHDMI_USE_INTERNAL_PHY; 264 sc->sc_base.sc_detect = dwhdmi_phy_detect; 265 sc->sc_base.sc_enable = dwhdmi_phy_enable; 266 sc->sc_base.sc_disable = dwhdmi_phy_disable; 267 sc->sc_base.sc_mode_set = dwhdmi_phy_mode_set; 268 sc->sc_base.sc_mpll_config = imx6_dwhdmi_mpll_config; 269 sc->sc_base.sc_phy_config = imx6_dwhdmi_phy_config; 270 271 if (dwhdmi_attach(&sc->sc_base) != 0) { 272 aprint_error_dev(self, "failed to attach driver\n"); 273 return; 274 } 275 276 sc->sc_ports.dp_ep_activate = imx6_dwhdmi_ep_activate; 277 sc->sc_ports.dp_ep_get_data = imx6_dwhdmi_ep_get_data; 278 fdt_ports_register(&sc->sc_ports, self, phandle, EP_DRM_ENCODER); 279 280 fdtbus_register_dai_controller(self, phandle, &imx6_dwhdmi_dai_funcs); 281 } 282 283 CFATTACH_DECL_NEW(imx6_dwhdmi, sizeof(struct imx6_dwhdmi_softc), 284 imx6_dwhdmi_match, imx6_dwhdmi_attach, NULL, NULL); 285