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 <drm/drmP.h>
28 #include "nouveau_drv.h"
29 #include "nouveau_reg.h"
30 #include "nouveau_encoder.h"
31 #include "nouveau_connector.h"
32 #include "nouveau_crtc.h"
33 #include "hw.h"
34 #include <drm/drm_crtc_helper.h>
35 
36 #include <drm/i2c/ch7006.h>
37 
38 static struct nvkm_i2c_bus_probe nv04_tv_encoder_info[] = {
39 	{
40 		{
41 			I2C_BOARD_INFO("ch7006", 0x75),
42 			.platform_data = &(struct ch7006_encoder_params) {
43 				CH7006_FORMAT_RGB24m12I, CH7006_CLOCK_MASTER,
44 				0, 0, 0,
45 				CH7006_SYNC_SLAVE, CH7006_SYNC_SEPARATED,
46 				CH7006_POUT_3_3V, CH7006_ACTIVE_HSYNC
47 			}
48 		},
49 		0
50 	},
51 	{ }
52 };
53 
54 int nv04_tv_identify(struct drm_device *dev, int i2c_index)
55 {
56 	struct nouveau_drm *drm = nouveau_drm(dev);
57 	struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
58 	struct nvkm_i2c_bus *bus = nvkm_i2c_bus_find(i2c, i2c_index);
59 	if (bus) {
60 		return nvkm_i2c_bus_probe(bus, "TV encoder",
61 					  nv04_tv_encoder_info,
62 					  NULL, NULL);
63 	}
64 	return -ENODEV;
65 }
66 
67 
68 #define PLLSEL_TV_CRTC1_MASK				\
69 	(NV_PRAMDAC_PLL_COEFF_SELECT_TV_VSCLK1		\
70 	 | NV_PRAMDAC_PLL_COEFF_SELECT_TV_PCLK1)
71 #define PLLSEL_TV_CRTC2_MASK				\
72 	(NV_PRAMDAC_PLL_COEFF_SELECT_TV_VSCLK2		\
73 	 | NV_PRAMDAC_PLL_COEFF_SELECT_TV_PCLK2)
74 
75 static void nv04_tv_dpms(struct drm_encoder *encoder, int mode)
76 {
77 	struct drm_device *dev = encoder->dev;
78 	struct nouveau_drm *drm = nouveau_drm(dev);
79 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
80 	struct nv04_mode_state *state = &nv04_display(dev)->mode_reg;
81 	uint8_t crtc1A;
82 
83 	NV_DEBUG(drm, "Setting dpms mode %d on TV encoder (output %d)\n",
84 		 mode, nv_encoder->dcb->index);
85 
86 	state->pllsel &= ~(PLLSEL_TV_CRTC1_MASK | PLLSEL_TV_CRTC2_MASK);
87 
88 	if (mode == DRM_MODE_DPMS_ON) {
89 		int head = nouveau_crtc(encoder->crtc)->index;
90 		crtc1A = NVReadVgaCrtc(dev, head, NV_CIO_CRE_RPC1_INDEX);
91 
92 		state->pllsel |= head ? PLLSEL_TV_CRTC2_MASK :
93 					PLLSEL_TV_CRTC1_MASK;
94 
95 		/* Inhibit hsync */
96 		crtc1A |= 0x80;
97 
98 		NVWriteVgaCrtc(dev, head, NV_CIO_CRE_RPC1_INDEX, crtc1A);
99 	}
100 
101 	NVWriteRAMDAC(dev, 0, NV_PRAMDAC_PLL_COEFF_SELECT, state->pllsel);
102 
103 	get_slave_funcs(encoder)->dpms(encoder, mode);
104 }
105 
106 static void nv04_tv_bind(struct drm_device *dev, int head, bool bind)
107 {
108 	struct nv04_crtc_reg *state = &nv04_display(dev)->mode_reg.crtc_reg[head];
109 
110 	state->tv_setup = 0;
111 
112 	if (bind)
113 		state->CRTC[NV_CIO_CRE_49] |= 0x10;
114 	else
115 		state->CRTC[NV_CIO_CRE_49] &= ~0x10;
116 
117 	NVWriteVgaCrtc(dev, head, NV_CIO_CRE_LCD__INDEX,
118 		       state->CRTC[NV_CIO_CRE_LCD__INDEX]);
119 	NVWriteVgaCrtc(dev, head, NV_CIO_CRE_49,
120 		       state->CRTC[NV_CIO_CRE_49]);
121 	NVWriteRAMDAC(dev, head, NV_PRAMDAC_TV_SETUP,
122 		      state->tv_setup);
123 }
124 
125 static void nv04_tv_prepare(struct drm_encoder *encoder)
126 {
127 	struct drm_device *dev = encoder->dev;
128 	int head = nouveau_crtc(encoder->crtc)->index;
129 	const struct drm_encoder_helper_funcs *helper = encoder->helper_private;
130 
131 	helper->dpms(encoder, DRM_MODE_DPMS_OFF);
132 
133 	nv04_dfp_disable(dev, head);
134 
135 	if (nv_two_heads(dev))
136 		nv04_tv_bind(dev, head ^ 1, false);
137 
138 	nv04_tv_bind(dev, head, true);
139 }
140 
141 static void nv04_tv_mode_set(struct drm_encoder *encoder,
142 			     struct drm_display_mode *mode,
143 			     struct drm_display_mode *adjusted_mode)
144 {
145 	struct drm_device *dev = encoder->dev;
146 	struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
147 	struct nv04_crtc_reg *regp = &nv04_display(dev)->mode_reg.crtc_reg[nv_crtc->index];
148 
149 	regp->tv_htotal = adjusted_mode->htotal;
150 	regp->tv_vtotal = adjusted_mode->vtotal;
151 
152 	/* These delay the TV signals with respect to the VGA port,
153 	 * they might be useful if we ever allow a CRTC to drive
154 	 * multiple outputs.
155 	 */
156 	regp->tv_hskew = 1;
157 	regp->tv_hsync_delay = 1;
158 	regp->tv_hsync_delay2 = 64;
159 	regp->tv_vskew = 1;
160 	regp->tv_vsync_delay = 1;
161 
162 	get_slave_funcs(encoder)->mode_set(encoder, mode, adjusted_mode);
163 }
164 
165 static void nv04_tv_commit(struct drm_encoder *encoder)
166 {
167 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
168 	struct drm_device *dev = encoder->dev;
169 	struct nouveau_drm *drm = nouveau_drm(dev);
170 	struct nouveau_crtc *nv_crtc = nouveau_crtc(encoder->crtc);
171 	const struct drm_encoder_helper_funcs *helper = encoder->helper_private;
172 
173 	helper->dpms(encoder, DRM_MODE_DPMS_ON);
174 
175 	NV_DEBUG(drm, "Output %s is running on CRTC %d using output %c\n",
176 		 nouveau_encoder_connector_get(nv_encoder)->base.name,
177 		 nv_crtc->index, '@' + ffs(nv_encoder->dcb->or));
178 }
179 
180 static void nv04_tv_destroy(struct drm_encoder *encoder)
181 {
182 	get_slave_funcs(encoder)->destroy(encoder);
183 	drm_encoder_cleanup(encoder);
184 
185 	kfree(encoder->helper_private);
186 	kfree(nouveau_encoder(encoder));
187 }
188 
189 static const struct drm_encoder_funcs nv04_tv_funcs = {
190 	.destroy = nv04_tv_destroy,
191 };
192 
193 static const struct drm_encoder_helper_funcs nv04_tv_helper_funcs = {
194 	.dpms = nv04_tv_dpms,
195 	.mode_fixup = drm_i2c_encoder_mode_fixup,
196 	.prepare = nv04_tv_prepare,
197 	.commit = nv04_tv_commit,
198 	.mode_set = nv04_tv_mode_set,
199 	.detect = drm_i2c_encoder_detect,
200 };
201 
202 int
203 nv04_tv_create(struct drm_connector *connector, struct dcb_output *entry)
204 {
205 	struct nouveau_encoder *nv_encoder;
206 	struct drm_encoder *encoder;
207 	struct drm_device *dev = connector->dev;
208 	struct nouveau_drm *drm = nouveau_drm(dev);
209 	struct nvkm_i2c *i2c = nvxx_i2c(&drm->client.device);
210 	struct nvkm_i2c_bus *bus = nvkm_i2c_bus_find(i2c, entry->i2c_index);
211 	int type, ret;
212 
213 	/* Ensure that we can talk to this encoder */
214 	type = nv04_tv_identify(dev, entry->i2c_index);
215 	if (type < 0)
216 		return type;
217 
218 	/* Allocate the necessary memory */
219 	nv_encoder = kzalloc(sizeof(*nv_encoder), GFP_KERNEL);
220 	if (!nv_encoder)
221 		return -ENOMEM;
222 
223 	/* Initialize the common members */
224 	encoder = to_drm_encoder(nv_encoder);
225 
226 	drm_encoder_init(dev, encoder, &nv04_tv_funcs, DRM_MODE_ENCODER_TVDAC,
227 			 NULL);
228 	drm_encoder_helper_add(encoder, &nv04_tv_helper_funcs);
229 
230 	nv_encoder->enc_save = drm_i2c_encoder_save;
231 	nv_encoder->enc_restore = drm_i2c_encoder_restore;
232 
233 	encoder->possible_crtcs = entry->heads;
234 	encoder->possible_clones = 0;
235 	nv_encoder->dcb = entry;
236 	nv_encoder->or = ffs(entry->or) - 1;
237 
238 	/* Run the slave-specific initialization */
239 	ret = drm_i2c_encoder_init(dev, to_encoder_slave(encoder),
240 				   &bus->i2c,
241 				   &nv04_tv_encoder_info[type].dev);
242 	if (ret < 0)
243 		goto fail_cleanup;
244 
245 	/* Attach it to the specified connector. */
246 	get_slave_funcs(encoder)->create_resources(encoder, connector);
247 	drm_mode_connector_attach_encoder(connector, encoder);
248 
249 	return 0;
250 
251 fail_cleanup:
252 	drm_encoder_cleanup(encoder);
253 	kfree(nv_encoder);
254 	return ret;
255 }
256