sunxi_dwhdmi.c revision 1.2
1 /* $NetBSD: sunxi_dwhdmi.c,v 1.2 2019/01/31 01:49:28 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 1.2 2019/01/31 01:49:28 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 65 struct fdt_device_ports sc_ports; 66 struct drm_display_mode sc_curmode; 67 }; 68 69 #define to_sunxi_dwhdmi_softc(x) container_of(x, struct sunxi_dwhdmi_softc, sc_base) 70 71 static int 72 sunxi_dwhdmi_ep_activate(device_t dev, struct fdt_endpoint *ep, bool activate) 73 { 74 struct sunxi_dwhdmi_softc * const sc = device_private(dev); 75 struct fdt_endpoint *in_ep = fdt_endpoint_remote(ep); 76 struct fdt_endpoint *out_ep, *out_rep; 77 struct drm_encoder *encoder; 78 struct drm_bridge *bridge; 79 int error; 80 81 if (!activate) 82 return EINVAL; 83 84 if (fdt_endpoint_port_index(ep) != DWHDMI_PORT_INPUT) 85 return EINVAL; 86 87 switch (fdt_endpoint_type(in_ep)) { 88 case EP_DRM_ENCODER: 89 encoder = fdt_endpoint_get_data(in_ep); 90 break; 91 case EP_DRM_BRIDGE: 92 bridge = fdt_endpoint_get_data(in_ep); 93 encoder = bridge->encoder; 94 break; 95 default: 96 encoder = NULL; 97 break; 98 } 99 100 if (encoder == NULL) 101 return EINVAL; 102 103 sc->sc_phy = fdtbus_phy_get(sc->sc_phandle, "hdmi-phy"); 104 if (sc->sc_phy == NULL) { 105 device_printf(dev, "couldn't find hdmi-phy\n"); 106 return ENXIO; 107 } 108 109 error = dwhdmi_bind(&sc->sc_base, encoder); 110 if (error != 0) 111 return error; 112 113 out_ep = fdt_endpoint_get_from_index(&sc->sc_ports, DWHDMI_PORT_OUTPUT, 0); 114 if (out_ep != NULL) { 115 /* Ignore downstream connectors, we have our own. */ 116 out_rep = fdt_endpoint_remote(out_ep); 117 if (out_rep != NULL && fdt_endpoint_type(out_rep) == EP_DRM_CONNECTOR) 118 return 0; 119 120 error = fdt_endpoint_activate(out_ep, activate); 121 if (error != 0) 122 return error; 123 } 124 125 return 0; 126 } 127 128 static void * 129 sunxi_dwhdmi_ep_get_data(device_t dev, struct fdt_endpoint *ep) 130 { 131 struct sunxi_dwhdmi_softc * const sc = device_private(dev); 132 133 return &sc->sc_base.sc_bridge; 134 } 135 136 static enum drm_connector_status 137 sunxi_dwhdmi_detect(struct dwhdmi_softc *dsc, bool force) 138 { 139 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 140 141 KASSERT(sc->sc_phy != NULL); 142 143 if (sunxi_hdmiphy_detect(sc->sc_phy, force)) 144 return connector_status_connected; 145 else 146 return connector_status_disconnected; 147 } 148 149 static void 150 sunxi_dwhdmi_enable(struct dwhdmi_softc *dsc) 151 { 152 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 153 int error; 154 155 KASSERT(sc->sc_phy != NULL); 156 157 error = fdtbus_phy_enable(sc->sc_phy, true); 158 if (error != 0) { 159 device_printf(dsc->sc_dev, "failed to enable phy: %d\n", error); 160 return; 161 } 162 163 error = sunxi_hdmiphy_config(sc->sc_phy, &sc->sc_curmode); 164 if (error != 0) 165 device_printf(dsc->sc_dev, "failed to configure phy: %d\n", error); 166 } 167 168 static void 169 sunxi_dwhdmi_disable(struct dwhdmi_softc *dsc) 170 { 171 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 172 int error; 173 174 KASSERT(sc->sc_phy != NULL); 175 176 error = fdtbus_phy_enable(sc->sc_phy, false); 177 if (error != 0) 178 device_printf(dsc->sc_dev, "failed to disable phy\n"); 179 } 180 181 static void 182 sunxi_dwhdmi_mode_set(struct dwhdmi_softc *dsc, struct drm_display_mode *mode, 183 struct drm_display_mode *adjusted_mode) 184 { 185 struct sunxi_dwhdmi_softc * const sc = to_sunxi_dwhdmi_softc(dsc); 186 187 sc->sc_curmode = *adjusted_mode; 188 } 189 190 static int 191 sunxi_dwhdmi_match(device_t parent, cfdata_t cf, void *aux) 192 { 193 struct fdt_attach_args * const faa = aux; 194 195 return of_match_compatible(faa->faa_phandle, compatible); 196 } 197 198 static void 199 sunxi_dwhdmi_attach(device_t parent, device_t self, void *aux) 200 { 201 struct sunxi_dwhdmi_softc * const sc = device_private(self); 202 struct fdt_attach_args * const faa = aux; 203 const int phandle = faa->faa_phandle; 204 struct clk *clk_iahb, *clk_isfr; 205 struct fdtbus_reset *rst; 206 bus_addr_t addr; 207 bus_size_t size; 208 209 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) { 210 aprint_error(": couldn't get registers\n"); 211 return; 212 } 213 214 rst = fdtbus_reset_get(phandle, "ctrl"); 215 if (rst == NULL || fdtbus_reset_deassert(rst) != 0) { 216 aprint_error(": couldn't de-assert reset\n"); 217 return; 218 } 219 220 clk_iahb = fdtbus_clock_get(phandle, "iahb"); 221 if (clk_iahb == NULL || clk_enable(clk_iahb) != 0) { 222 aprint_error(": couldn't enable iahb clock\n"); 223 return; 224 } 225 226 clk_isfr = fdtbus_clock_get(phandle, "isfr"); 227 if (clk_isfr == NULL || clk_enable(clk_isfr) != 0) { 228 aprint_error(": couldn't enable isfr clock\n"); 229 return; 230 } 231 232 sc->sc_base.sc_dev = self; 233 sc->sc_base.sc_reg_width = 1; 234 sc->sc_base.sc_bst = faa->faa_bst; 235 if (bus_space_map(sc->sc_base.sc_bst, addr, size, 0, &sc->sc_base.sc_bsh) != 0) { 236 aprint_error(": couldn't map registers\n"); 237 return; 238 } 239 sc->sc_base.sc_detect = sunxi_dwhdmi_detect; 240 sc->sc_base.sc_enable = sunxi_dwhdmi_enable; 241 sc->sc_base.sc_disable = sunxi_dwhdmi_disable; 242 sc->sc_base.sc_mode_set = sunxi_dwhdmi_mode_set; 243 sc->sc_phandle = faa->faa_phandle; 244 245 aprint_naive("\n"); 246 aprint_normal(": HDMI TX\n"); 247 248 if (dwhdmi_attach(&sc->sc_base) != 0) { 249 aprint_error_dev(self, "failed to attach driver\n"); 250 return; 251 } 252 253 sc->sc_ports.dp_ep_activate = sunxi_dwhdmi_ep_activate; 254 sc->sc_ports.dp_ep_get_data = sunxi_dwhdmi_ep_get_data; 255 fdt_ports_register(&sc->sc_ports, self, phandle, EP_DRM_BRIDGE); 256 } 257 258 CFATTACH_DECL_NEW(sunxi_dwhdmi, sizeof(struct sunxi_dwhdmi_softc), 259 sunxi_dwhdmi_match, sunxi_dwhdmi_attach, NULL, NULL); 260
Indexes created Mon Oct 20 20:10:13 GMT 2025