sunxi_dwhdmi.c revision 1.3.4.3
1 /* $NetBSD: sunxi_dwhdmi.c,v 1.3.4.3 2020/04/08 14:07:31 martin 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 1.3.4.3 2020/04/08 14:07:31 martin 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 struct clk *sc_clk; 66 67 struct fdt_device_ports sc_ports; 68 struct drm_display_mode sc_curmode; 69 }; 70 71 #define to_sunxi_dwhdmi_softc(x) container_of(x, struct sunxi_dwhdmi_softc, sc_base) 72 73 static int 74 sunxi_dwhdmi_ep_activate(device_t dev, struct fdt_endpoint *ep, bool activate) 75 { 76 struct sunxi_dwhdmi_softc * const sc = device_private(dev); 77 struct fdt_endpoint *in_ep = fdt_endpoint_remote(ep); 78 struct fdt_endpoint *out_ep, *out_rep; 79 struct drm_encoder *encoder; 80 struct drm_bridge *bridge; 81 int error; 82 83 if (!activate) 84 return EINVAL; 85 86 if (fdt_endpoint_port_index(ep) != DWHDMI_PORT_INPUT) 87 return EINVAL; 88 89 switch (fdt_endpoint_type(in_ep)) { 90 case EP_DRM_ENCODER: 91 encoder = fdt_endpoint_get_data(in_ep); 92 break; 93 case EP_DRM_BRIDGE: 94 bridge = fdt_endpoint_get_data(in_ep); 95 encoder = bridge->encoder; 96 break; 97 default: 98 encoder = NULL; 99 break; 100 } 101 102 if (encoder == NULL) 103 return EINVAL; 104 105 if (sc->sc_regulator != NULL) { 106 error = fdtbus_regulator_enable(sc->sc_regulator); 107 if (error != 0) { 108 device_printf(dev, "couldn't enable supply\n"); 109 return error; 110 } 111 } 112 113 error = dwhdmi_bind(&sc->sc_base, encoder); 114 if (error != 0) 115 return error; 116 117 out_ep = fdt_endpoint_get_from_index(&sc->sc_ports, DWHDMI_PORT_OUTPUT, 0); 118 if (out_ep != NULL) { 119 /* Ignore downstream connectors, we have our own. */ 120 out_rep = fdt_endpoint_remote(out_ep); 121 if (out_rep != NULL && fdt_endpoint_type(out_rep) == EP_DRM_CONNECTOR) 122 return 0; 123 124 error = fdt_endpoint_activate(out_ep, activate); 125 if (error != 0) 126 return error; 127 } 128 129 return 0; 130 } 131 132 static void * 133 sunxi_dwhdmi_ep_get_data(device_t dev, struct fdt_endpoint *ep) 134 { 135 struct sunxi_dwhdmi_softc * const sc = device_private(dev); 136 137 return &sc->sc_base.sc_bridge; 138 } 139 140 static enum drm_connector_status 141 sunxi_dwhdmi_detect(struct dwhdmi_softc *dsc, bool force) 142 { 143 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 144 145 KASSERT(sc->sc_phy != NULL); 146 147 if (sunxi_hdmiphy_detect(sc->sc_phy, force)) 148 return connector_status_connected; 149 else 150 return connector_status_disconnected; 151 } 152 153 static void 154 sunxi_dwhdmi_enable(struct dwhdmi_softc *dsc) 155 { 156 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 157 int error; 158 159 KASSERT(sc->sc_phy != NULL); 160 161 error = fdtbus_phy_enable(sc->sc_phy, true); 162 if (error != 0) { 163 device_printf(dsc->sc_dev, "failed to enable phy: %d\n", error); 164 return; 165 } 166 167 error = sunxi_hdmiphy_config(sc->sc_phy, &sc->sc_curmode); 168 if (error != 0) 169 device_printf(dsc->sc_dev, "failed to configure phy: %d\n", error); 170 } 171 172 static void 173 sunxi_dwhdmi_disable(struct dwhdmi_softc *dsc) 174 { 175 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 176 int error; 177 178 KASSERT(sc->sc_phy != NULL); 179 180 error = fdtbus_phy_enable(sc->sc_phy, false); 181 if (error != 0) 182 device_printf(dsc->sc_dev, "failed to disable phy\n"); 183 } 184 185 static void 186 sunxi_dwhdmi_mode_set(struct dwhdmi_softc *dsc, struct drm_display_mode *mode, 187 struct drm_display_mode *adjusted_mode) 188 { 189 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 190 int error; 191 192 if (sc->sc_clk != NULL) { 193 error = clk_set_rate(sc->sc_clk, adjusted_mode->clock * 1000); 194 if (error != 0) 195 device_printf(sc->sc_base.sc_dev, 196 "couldn't set pixel clock to %u Hz: %d\n", 197 adjusted_mode->clock * 1000, error); 198 } 199 200 sc->sc_curmode = *adjusted_mode; 201 } 202 203 static int 204 sunxi_dwhdmi_match(device_t parent, cfdata_t cf, void *aux) 205 { 206 struct fdt_attach_args * const faa = aux; 207 208 return of_match_compatible(faa->faa_phandle, compatible); 209 } 210 211 static void 212 sunxi_dwhdmi_attach(device_t parent, device_t self, void *aux) 213 { 214 struct sunxi_dwhdmi_softc * const sc = device_private(self); 215 struct fdt_attach_args * const faa = aux; 216 prop_dictionary_t prop = device_properties(self); 217 const int phandle = faa->faa_phandle; 218 struct clk *clk_iahb, *clk_isfr, *clk_tmds; 219 struct fdtbus_reset *rst; 220 bool is_disabled; 221 bus_addr_t addr; 222 bus_size_t size; 223 224 if (prop_dictionary_get_bool(prop, "disabled", &is_disabled) && is_disabled) { 225 aprint_naive("\n"); 226 aprint_normal(": HDMI TX (disabled)\n"); 227 return; 228 } 229 230 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 231 aprint_error(": couldn't get registers\n"); 232 return; 233 } 234 235 clk_iahb = fdtbus_clock_get(phandle, "iahb"); 236 if (clk_iahb == NULL || clk_enable(clk_iahb) != 0) { 237 aprint_error(": couldn't enable iahb clock\n"); 238 return; 239 } 240 241 clk_isfr = fdtbus_clock_get(phandle, "isfr"); 242 if (clk_isfr == NULL || clk_enable(clk_isfr) != 0) { 243 aprint_error(": couldn't enable isfr clock\n"); 244 return; 245 } 246 247 clk_tmds = fdtbus_clock_get(phandle, "tmds"); 248 if (clk_tmds == NULL || clk_enable(clk_tmds) != 0) { 249 aprint_error(": couldn't enable tmds clock\n"); 250 return; 251 } 252 253 sc->sc_base.sc_dev = self; 254 sc->sc_base.sc_reg_width = 1; 255 sc->sc_base.sc_bst = faa->faa_bst; 256 if (bus_space_map(sc->sc_base.sc_bst, addr, size, 0, &sc->sc_base.sc_bsh) != 0) { 257 aprint_error(": couldn't map registers\n"); 258 return; 259 } 260 sc->sc_base.sc_detect = sunxi_dwhdmi_detect; 261 sc->sc_base.sc_enable = sunxi_dwhdmi_enable; 262 sc->sc_base.sc_disable = sunxi_dwhdmi_disable; 263 sc->sc_base.sc_mode_set = sunxi_dwhdmi_mode_set; 264 sc->sc_base.sc_scl_hcnt = 0xd8; 265 sc->sc_base.sc_scl_lcnt = 0xfe; 266 sc->sc_phandle = faa->faa_phandle; 267 sc->sc_clk = clk_tmds; 268 269 aprint_naive("\n"); 270 aprint_normal(": HDMI TX\n"); 271 272 sc->sc_regulator = fdtbus_regulator_acquire(sc->sc_phandle, "hvcc-supply"); 273 274 sc->sc_phy = fdtbus_phy_get(sc->sc_phandle, "hdmi-phy"); 275 if (sc->sc_phy == NULL) 276 sc->sc_phy = fdtbus_phy_get(sc->sc_phandle, "phy"); 277 if (sc->sc_phy == NULL) { 278 device_printf(self, "couldn't find PHY\n"); 279 return; 280 } 281 282 rst = fdtbus_reset_get(phandle, "ctrl"); 283 if (rst == NULL || fdtbus_reset_deassert(rst) != 0) { 284 aprint_error_dev(self, "couldn't de-assert reset\n"); 285 return; 286 } 287 288 sunxi_hdmiphy_init(sc->sc_phy); 289 290 if (dwhdmi_attach(&sc->sc_base) != 0) { 291 aprint_error_dev(self, "failed to attach driver\n"); 292 return; 293 } 294 295 sc->sc_ports.dp_ep_activate = sunxi_dwhdmi_ep_activate; 296 sc->sc_ports.dp_ep_get_data = sunxi_dwhdmi_ep_get_data; 297 fdt_ports_register(&sc->sc_ports, self, phandle, EP_DRM_BRIDGE); 298 } 299 300 CFATTACH_DECL_NEW(sunxi_dwhdmi, sizeof(struct sunxi_dwhdmi_softc), 301 sunxi_dwhdmi_match, sunxi_dwhdmi_attach, NULL, NULL); 302
Indexes created Wed Oct 22 13:09:56 GMT 2025