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
imx6_dwhdmi_encoder_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)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
imx6_dwhdmi_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted)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
imx6_dwhdmi_encoder_enable(struct drm_encoder * encoder)99 imx6_dwhdmi_encoder_enable(struct drm_encoder *encoder)
100 {
101 }
102
103 static void
imx6_dwhdmi_encoder_disable(struct drm_encoder * encoder)104 imx6_dwhdmi_encoder_disable(struct drm_encoder *encoder)
105 {
106 }
107
108 static void
imx6_dwhdmi_encoder_prepare(struct drm_encoder * encoder)109 imx6_dwhdmi_encoder_prepare(struct drm_encoder *encoder)
110 {
111 }
112
113 static void
imx6_dwhdmi_encoder_commit(struct drm_encoder * encoder)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
imx6_dwhdmi_ep_activate(device_t dev,struct fdt_endpoint * ep,bool activate)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 *
imx6_dwhdmi_ep_get_data(device_t dev,struct fdt_endpoint * ep)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
imx6_dwhdmi_dai_get_tag(device_t dev,const void * data,size_t len)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
imx6_dwhdmi_match(device_t parent,cfdata_t cf,void * aux)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
imx6_dwhdmi_attach(device_t parent,device_t self,void * aux)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