sunxi_dwhdmi.c revision 1.6
1 /* $NetBSD: sunxi_dwhdmi.c,v 1.6 2019/11/23 12:30:45 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: sunxi_dwhdmi.c,v 1.6 2019/11/23 12:30:45 jmcneill Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/bus.h> 34 #include <sys/device.h> 35 #include <sys/intr.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/conf.h> 39 40 #include <drm/drmP.h> 41 42 #include <dev/fdt/fdtvar.h> 43 #include <dev/fdt/fdt_port.h> 44 45 #include <dev/ic/dw_hdmi.h> 46 47 #include <arm/sunxi/sunxi_hdmiphy.h> 48 49 enum { 50 DWHDMI_PORT_INPUT = 0, 51 DWHDMI_PORT_OUTPUT = 1, 52 }; 53 54 static const char * const compatible[] = { 55 "allwinner,sun8i-h3-dw-hdmi", 56 "allwinner,sun50i-a64-dw-hdmi", 57 NULL 58 }; 59 60 struct sunxi_dwhdmi_softc { 61 struct dwhdmi_softc sc_base; 62 int sc_phandle; 63 struct fdtbus_phy *sc_phy; 64 struct fdtbus_regulator *sc_regulator; 65 66 struct fdt_device_ports sc_ports; 67 struct drm_display_mode sc_curmode; 68 }; 69 70 #define to_sunxi_dwhdmi_softc(x) container_of(x, struct sunxi_dwhdmi_softc, sc_base) 71 72 static int 73 sunxi_dwhdmi_ep_activate(device_t dev, struct fdt_endpoint *ep, bool activate) 74 { 75 struct sunxi_dwhdmi_softc * const sc = device_private(dev); 76 struct fdt_endpoint *in_ep = fdt_endpoint_remote(ep); 77 struct fdt_endpoint *out_ep, *out_rep; 78 struct drm_encoder *encoder; 79 struct drm_bridge *bridge; 80 int error; 81 82 if (!activate) 83 return EINVAL; 84 85 if (fdt_endpoint_port_index(ep) != DWHDMI_PORT_INPUT) 86 return EINVAL; 87 88 switch (fdt_endpoint_type(in_ep)) { 89 case EP_DRM_ENCODER: 90 encoder = fdt_endpoint_get_data(in_ep); 91 break; 92 case EP_DRM_BRIDGE: 93 bridge = fdt_endpoint_get_data(in_ep); 94 encoder = bridge->encoder; 95 break; 96 default: 97 encoder = NULL; 98 break; 99 } 100 101 if (encoder == NULL) 102 return EINVAL; 103 104 if (sc->sc_regulator != NULL) { 105 error = fdtbus_regulator_enable(sc->sc_regulator); 106 if (error != 0) { 107 device_printf(dev, "couldn't enable supply\n"); 108 return error; 109 } 110 } 111 112 error = dwhdmi_bind(&sc->sc_base, encoder); 113 if (error != 0) 114 return error; 115 116 out_ep = fdt_endpoint_get_from_index(&sc->sc_ports, DWHDMI_PORT_OUTPUT, 0); 117 if (out_ep != NULL) { 118 /* Ignore downstream connectors, we have our own. */ 119 out_rep = fdt_endpoint_remote(out_ep); 120 if (out_rep != NULL && fdt_endpoint_type(out_rep) == EP_DRM_CONNECTOR) 121 return 0; 122 123 error = fdt_endpoint_activate(out_ep, activate); 124 if (error != 0) 125 return error; 126 } 127 128 return 0; 129 } 130 131 static void * 132 sunxi_dwhdmi_ep_get_data(device_t dev, struct fdt_endpoint *ep) 133 { 134 struct sunxi_dwhdmi_softc * const sc = device_private(dev); 135 136 return &sc->sc_base.sc_bridge; 137 } 138 139 static enum drm_connector_status 140 sunxi_dwhdmi_detect(struct dwhdmi_softc *dsc, bool force) 141 { 142 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 143 144 KASSERT(sc->sc_phy != NULL); 145 146 if (sunxi_hdmiphy_detect(sc->sc_phy, force)) 147 return connector_status_connected; 148 else 149 return connector_status_disconnected; 150 } 151 152 static void 153 sunxi_dwhdmi_enable(struct dwhdmi_softc *dsc) 154 { 155 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 156 int error; 157 158 KASSERT(sc->sc_phy != NULL); 159 160 error = fdtbus_phy_enable(sc->sc_phy, true); 161 if (error != 0) { 162 device_printf(dsc->sc_dev, "failed to enable phy: %d\n", error); 163 return; 164 } 165 166 error = sunxi_hdmiphy_config(sc->sc_phy, &sc->sc_curmode); 167 if (error != 0) 168 device_printf(dsc->sc_dev, "failed to configure phy: %d\n", error); 169 } 170 171 static void 172 sunxi_dwhdmi_disable(struct dwhdmi_softc *dsc) 173 { 174 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 175 int error; 176 177 KASSERT(sc->sc_phy != NULL); 178 179 error = fdtbus_phy_enable(sc->sc_phy, false); 180 if (error != 0) 181 device_printf(dsc->sc_dev, "failed to disable phy\n"); 182 } 183 184 static void 185 sunxi_dwhdmi_mode_set(struct dwhdmi_softc *dsc, struct drm_display_mode *mode, 186 struct drm_display_mode *adjusted_mode) 187 { 188 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 189 190 sc->sc_curmode = *adjusted_mode; 191 } 192 193 static audio_dai_tag_t 194 sunxi_dwhdmi_dai_get_tag(device_t dev, const void *data, size_t len) 195 { 196 struct sunxi_dwhdmi_softc * const sc = device_private(dev); 197 198 if (len != 4) 199 return NULL; 200 201 return &sc->sc_base.sc_dai; 202 } 203 204 static struct fdtbus_dai_controller_func sunxi_dwhdmi_dai_funcs = { 205 .get_tag = sunxi_dwhdmi_dai_get_tag 206 }; 207 208 static int 209 sunxi_dwhdmi_match(device_t parent, cfdata_t cf, void *aux) 210 { 211 struct fdt_attach_args * const faa = aux; 212 213 return of_match_compatible(faa->faa_phandle, compatible); 214 } 215 216 static void 217 sunxi_dwhdmi_attach(device_t parent, device_t self, void *aux) 218 { 219 struct sunxi_dwhdmi_softc * const sc = device_private(self); 220 struct fdt_attach_args * const faa = aux; 221 const int phandle = faa->faa_phandle; 222 struct clk *clk_iahb, *clk_isfr, *clk_tmds; 223 struct fdtbus_reset *rst; 224 bus_addr_t addr; 225 bus_size_t size; 226 227 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 228 aprint_error(": couldn't get registers\n"); 229 return; 230 } 231 232 rst = fdtbus_reset_get(phandle, "ctrl"); 233 if (rst == NULL || fdtbus_reset_deassert(rst) != 0) { 234 aprint_error(": couldn't de-assert reset\n"); 235 return; 236 } 237 238 clk_iahb = fdtbus_clock_get(phandle, "iahb"); 239 if (clk_iahb == NULL || clk_enable(clk_iahb) != 0) { 240 aprint_error(": couldn't enable iahb clock\n"); 241 return; 242 } 243 244 clk_isfr = fdtbus_clock_get(phandle, "isfr"); 245 if (clk_isfr == NULL || clk_enable(clk_isfr) != 0) { 246 aprint_error(": couldn't enable isfr clock\n"); 247 return; 248 } 249 250 clk_tmds = fdtbus_clock_get(phandle, "tmds"); 251 if (clk_tmds == NULL || clk_enable(clk_tmds) != 0) { 252 aprint_error(": couldn't enable tmds clock\n"); 253 return; 254 } 255 256 sc->sc_base.sc_dev = self; 257 sc->sc_base.sc_reg_width = 1; 258 sc->sc_base.sc_bst = faa->faa_bst; 259 if (bus_space_map(sc->sc_base.sc_bst, addr, size, 0, &sc->sc_base.sc_bsh) != 0) { 260 aprint_error(": couldn't map registers\n"); 261 return; 262 } 263 sc->sc_base.sc_detect = sunxi_dwhdmi_detect; 264 sc->sc_base.sc_enable = sunxi_dwhdmi_enable; 265 sc->sc_base.sc_disable = sunxi_dwhdmi_disable; 266 sc->sc_base.sc_mode_set = sunxi_dwhdmi_mode_set; 267 sc->sc_base.sc_scl_hcnt = 0xd8; 268 sc->sc_base.sc_scl_lcnt = 0xfe; 269 sc->sc_phandle = faa->faa_phandle; 270 271 aprint_naive("\n"); 272 aprint_normal(": HDMI TX\n"); 273 274 sc->sc_regulator = fdtbus_regulator_acquire(sc->sc_phandle, "hvcc-supply"); 275 276 sc->sc_phy = fdtbus_phy_get(sc->sc_phandle, "hdmi-phy"); 277 if (sc->sc_phy == NULL) 278 sc->sc_phy = fdtbus_phy_get(sc->sc_phandle, "phy"); 279 if (sc->sc_phy == NULL) { 280 device_printf(self, "couldn't find PHY\n"); 281 return; 282 } 283 284 sunxi_hdmiphy_init(sc->sc_phy); 285 286 if (dwhdmi_attach(&sc->sc_base) != 0) { 287 aprint_error_dev(self, "failed to attach driver\n"); 288 return; 289 } 290 291 sc->sc_ports.dp_ep_activate = sunxi_dwhdmi_ep_activate; 292 sc->sc_ports.dp_ep_get_data = sunxi_dwhdmi_ep_get_data; 293 fdt_ports_register(&sc->sc_ports, self, phandle, EP_DRM_BRIDGE); 294 295 fdtbus_register_dai_controller(self, phandle, &sunxi_dwhdmi_dai_funcs); 296 } 297 298 CFATTACH_DECL_NEW(sunxi_dwhdmi, sizeof(struct sunxi_dwhdmi_softc), 299 sunxi_dwhdmi_match, sunxi_dwhdmi_attach, NULL, NULL); 300
Indexes created Wed Oct 22 13:09:56 GMT 2025