1 /*
2  * Copyright (C) 2009 Francisco Jerez.
3  * All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining
6  * a copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
8  * without limitation the rights to use, copy, modify, merge, publish,
9  * distribute, sublicense, and/or sell copies of the Software, and to
10  * permit persons to whom the Software is furnished to do so, subject to
11  * the following conditions:
12  *
13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial
15  * portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24  *
25  */
26 
27 #include "nouveau_drv.h"
28 #include "nouveau_reg.h"
29 #include "nouveau_encoder.h"
30 #include "nouveau_connector.h"
31 #include "nouveau_crtc.h"
32 #include "hw.h"
33 #include <drm/drm_modeset_helper_vtables.h>
34 
35 #include <drm/i2c/ch7006.h>
36 
37 static struct nvkm_i2c_bus_probe nv04_tv_encoder_info[] = {
38 	{
39 		{
40 			I2C_BOARD_INFO("ch7006", 0x75),
41 			.platform_data = &(struct ch7006_encoder_params) {
42 				CH7006_FORMAT_RGB24m12I, CH7006_CLOCK_MASTER,
43 				0, 0, 0,
44 				CH7006_SYNC_SLAVE, CH7006_SYNC_SEPARATED,
45 				CH7006_POUT_3_3V, CH7006_ACTIVE_HSYNC
46 			}
47 		},
48 		0
49 	},
50 	{ }
51 };
52 
53 int nv04_tv_identify(struct drm_device *dev, int i2c_index)
54 {
55 	struct nouveau_drm *drm = nouveau_drm(dev);
56 	struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
57 	struct nvkm_i2c_bus *bus = nvkm_i2c_bus_find(i2c, i2c_index);
58 	if (bus) {
59 		return nvkm_i2c_bus_probe(bus, "TV encoder",
60 					  nv04_tv_encoder_info,
61 					  NULL, NULL);
62 	}
63 	return -ENODEV;
64 }
65 
66 
67 #define PLLSEL_TV_CRTC1_MASK				\
68 	(NV_PRAMDAC_PLL_COEFF_SELECT_TV_VSCLK1		\
69 	 | NV_PRAMDAC_PLL_COEFF_SELECT_TV_PCLK1)
70 #define PLLSEL_TV_CRTC2_MASK				\
71 	(NV_PRAMDAC_PLL_COEFF_SELECT_TV_VSCLK2		\
72 	 | NV_PRAMDAC_PLL_COEFF_SELECT_TV_PCLK2)
73 
74 static void nv04_tv_dpms(struct drm_encoder *encoder, int mode)
75 {
76 	struct drm_device *dev = encoder->dev;
77 	struct nouveau_drm *drm = nouveau_drm(dev);
78 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
79 	struct nv04_mode_state *state = &nv04_display(dev)->mode_reg;
80 	uint8_t crtc1A;
81 
82 	NV_DEBUG(drm, "Setting dpms mode %d on TV encoder (output %d)\n",
83 		 mode, nv_encoder->dcb->index);
84 
85 	state->pllsel &= ~(PLLSEL_TV_CRTC1_MASK | PLLSEL_TV_CRTC2_MASK);
86 
87 	if (mode == DRM_MODE_DPMS_ON) {
88 		int head = nouveau_crtc(encoder->crtc)->index;
89 		crtc1A = NVReadVgaCrtc(dev, head, NV_CIO_CRE_RPC1_INDEX);
90 
91 		state->pllsel |= head ? PLLSEL_TV_CRTC2_MASK :
92 					PLLSEL_TV_CRTC1_MASK;
93 
94 		/* Inhibit hsync */
95 		crtc1A |= 0x80;
96 
97 		NVWriteVgaCrtc(dev, head, NV_CIO_CRE_RPC1_INDEX, crtc1A);
98 	}
99 
100 	NVWriteRAMDAC(dev, 0, NV_PRAMDAC_PLL_COEFF_SELECT, state->pllsel);
101 
102 	get_slave_funcs(encoder)->dpms(encoder, mode);
103 }
104 
105 static void nv04_tv_bind(struct drm_device *dev, int head, bool bind)
106 {
107 	struct nv04_crtc_reg *state = &nv04_display(dev)->mode_reg.crtc_reg[head];
108 
109 	state->tv_setup = 0;
110 
111 	if (bind)
112 		state->CRTC[NV_CIO_CRE_49] |= 0x10;
113 	else
114 		state->CRTC[NV_CIO_CRE_49] &= ~0x10;
115 
116 	NVWriteVgaCrtc(dev, head, NV_CIO_CRE_LCD__INDEX,
117 		       state->CRTC[NV_CIO_CRE_LCD__INDEX]);
118 	NVWriteVgaCrtc(dev, head, NV_CIO_CRE_49,
119 		       state->CRTC[NV_CIO_CRE_49]);
120 	NVWriteRAMDAC(dev, head, NV_PRAMDAC_TV_SETUP,
121 		      state->tv_setup);
122 }
123 
124 static void nv04_tv_prepare(struct drm_encoder *encoder)
125 {
126 	struct drm_device *dev = encoder->dev;
127 	int head = nouveau_crtc(encoder->crtc)->index;
128 	const struct drm_encoder_helper_funcs *helper = encoder->helper_private;
129 
130 	helper->dpms(encoder, DRM_MODE_DPMS_OFF);
131 
132 	nv04_dfp_disable(dev, head);
133 
134 	if (nv_two_heads(dev))
135 		nv04_tv_bind(dev, head ^ 1, false);
136 
137 	nv04_tv_bind(dev, head, true);
138 }
139 
140 static void nv04_tv_mode_set(struct drm_encoder *encoder,
141 			     struct drm_display_mode *mode,
142 			     struct drm_display_mode *adjusted_mode)
143 {
144 	struct drm_device *dev = encoder->dev;
145 	struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
146 	struct nv04_crtc_reg *regp = &nv04_display(dev)->mode_reg.crtc_reg[nv_crtc->index];
147 
148 	regp->tv_htotal = adjusted_mode->htotal;
149 	regp->tv_vtotal = adjusted_mode->vtotal;
150 
151 	/* These delay the TV signals with respect to the VGA port,
152 	 * they might be useful if we ever allow a CRTC to drive
153 	 * multiple outputs.
154 	 */
155 	regp->tv_hskew = 1;
156 	regp->tv_hsync_delay = 1;
157 	regp->tv_hsync_delay2 = 64;
158 	regp->tv_vskew = 1;
159 	regp->tv_vsync_delay = 1;
160 
161 	get_slave_funcs(encoder)->mode_set(encoder, mode, adjusted_mode);
162 }
163 
164 static void nv04_tv_commit(struct drm_encoder *encoder)
165 {
166 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
167 	struct drm_device *dev = encoder->dev;
168 	struct nouveau_drm *drm = nouveau_drm(dev);
169 	struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
170 	const struct drm_encoder_helper_funcs *helper = encoder->helper_private;
171 
172 	helper->dpms(encoder, DRM_MODE_DPMS_ON);
173 
174 	NV_DEBUG(drm, "Output %s is running on CRTC %d using output %c\n",
175 		 nv04_encoder_get_connector(nv_encoder)->base.name,
176 		 nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
177 }
178 
179 static void nv04_tv_destroy(struct drm_encoder *encoder)
180 {
181 	get_slave_funcs(encoder)->destroy(encoder);
182 	drm_encoder_cleanup(encoder);
183 
184 	kfree(encoder->helper_private);
185 	kfree(nouveau_encoder(encoder));
186 }
187 
188 static const struct drm_encoder_funcs nv04_tv_funcs = {
189 	.destroy = nv04_tv_destroy,
190 };
191 
192 static const struct drm_encoder_helper_funcs nv04_tv_helper_funcs = {
193 	.dpms = nv04_tv_dpms,
194 	.mode_fixup = drm_i2c_encoder_mode_fixup,
195 	.prepare = nv04_tv_prepare,
196 	.commit = nv04_tv_commit,
197 	.mode_set = nv04_tv_mode_set,
198 	.detect = drm_i2c_encoder_detect,
199 };
200 
201 int
202 nv04_tv_create(struct drm_connector *connector, struct dcb_output *entry)
203 {
204 	struct nouveau_encoder *nv_encoder;
205 	struct drm_encoder *encoder;
206 	struct drm_device *dev = connector->dev;
207 	struct nouveau_drm *drm = nouveau_drm(dev);
208 	struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
209 	struct nvkm_i2c_bus *bus = nvkm_i2c_bus_find(i2c, entry->i2c_index);
210 	int type, ret;
211 
212 	/* Ensure that we can talk to this encoder */
213 	type = nv04_tv_identify(dev, entry->i2c_index);
214 	if (type < 0)
215 		return type;
216 
217 	/* Allocate the necessary memory */
218 	nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
219 	if (!nv_encoder)
220 		return -ENOMEM;
221 
222 	/* Initialize the common members */
223 	encoder = to_drm_encoder(nv_encoder);
224 
225 	drm_encoder_init(dev, encoder, &nv04_tv_funcs, DRM_MODE_ENCODER_TVDAC,
226 			 NULL);
227 	drm_encoder_helper_add(encoder, &nv04_tv_helper_funcs);
228 
229 	nv_encoder->enc_save = drm_i2c_encoder_save;
230 	nv_encoder->enc_restore = drm_i2c_encoder_restore;
231 
232 	encoder->possible_crtcs = entry->heads;
233 	encoder->possible_clones = 0;
234 	nv_encoder->dcb = entry;
235 	nv_encoder->or = ffs(entry->or) - 1;
236 
237 	/* Run the slave-specific initialization */
238 	ret = drm_i2c_encoder_init(dev, to_encoder_slave(encoder),
239 				   &bus->i2c,
240 				   &nv04_tv_encoder_info[type].dev);
241 	if (ret < 0)
242 		goto fail_cleanup;
243 
244 	/* Attach it to the specified connector. */
245 	get_slave_funcs(encoder)->create_resources(encoder, connector);
246 	drm_connector_attach_encoder(connector, encoder);
247 
248 	return 0;
249 
250 fail_cleanup:
251 	drm_encoder_cleanup(encoder);
252 	kfree(nv_encoder);
253 	return ret;
254 }
255