1/*
2 * Copyright 2009 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Author: Ben Skeggs
23 */
24
25#include "drmP.h"
26#include "drm.h"
27#include "drm_crtc_helper.h"
28
29#include "nouveau_drv.h"
30#include "nouveau_fb.h"
31#include "nouveau_hw.h"
32#include "nouveau_encoder.h"
33#include "nouveau_connector.h"
34
35static void nv04_vblank_crtc0_isr(struct drm_device *);
36static void nv04_vblank_crtc1_isr(struct drm_device *);
37
38static void
39nv04_display_store_initial_head_owner(struct drm_device *dev)
40{
41	struct drm_nouveau_private *dev_priv = dev->dev_private;
42
43	if (dev_priv->chipset != 0x11) {
44		dev_priv->crtc_owner = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_44);
45		return;
46	}
47
48	/* reading CR44 is broken on nv11, so we attempt to infer it */
49	if (nvReadMC(dev, NV_PBUS_DEBUG_1) & (1 << 28))	/* heads tied, restore both */
50		dev_priv->crtc_owner = 0x4;
51	else {
52		uint8_t slaved_on_A, slaved_on_B;
53		bool tvA = false;
54		bool tvB = false;
55
56		slaved_on_B = NVReadVgaCrtc(dev, 1, NV_CIO_CRE_PIXEL_INDEX) &
57									0x80;
58		if (slaved_on_B)
59			tvB = !(NVReadVgaCrtc(dev, 1, NV_CIO_CRE_LCD__INDEX) &
60					MASK(NV_CIO_CRE_LCD_LCD_SELECT));
61
62		slaved_on_A = NVReadVgaCrtc(dev, 0, NV_CIO_CRE_PIXEL_INDEX) &
63									0x80;
64		if (slaved_on_A)
65			tvA = !(NVReadVgaCrtc(dev, 0, NV_CIO_CRE_LCD__INDEX) &
66					MASK(NV_CIO_CRE_LCD_LCD_SELECT));
67
68		if (slaved_on_A && !tvA)
69			dev_priv->crtc_owner = 0x0;
70		else if (slaved_on_B && !tvB)
71			dev_priv->crtc_owner = 0x3;
72		else if (slaved_on_A)
73			dev_priv->crtc_owner = 0x0;
74		else if (slaved_on_B)
75			dev_priv->crtc_owner = 0x3;
76		else
77			dev_priv->crtc_owner = 0x0;
78	}
79}
80
81int
82nv04_display_early_init(struct drm_device *dev)
83{
84	/* Make the I2C buses accessible. */
85	if (!nv_gf4_disp_arch(dev)) {
86		uint32_t pmc_enable = nv_rd32(dev, NV03_PMC_ENABLE);
87
88		if (!(pmc_enable & 1))
89			nv_wr32(dev, NV03_PMC_ENABLE, pmc_enable | 1);
90	}
91
92	/* Unlock the VGA CRTCs. */
93	NVLockVgaCrtcs(dev, false);
94
95	/* Make sure the CRTCs aren't in slaved mode. */
96	if (nv_two_heads(dev)) {
97		nv04_display_store_initial_head_owner(dev);
98		NVSetOwner(dev, 0);
99	}
100
101	return 0;
102}
103
104void
105nv04_display_late_takedown(struct drm_device *dev)
106{
107	struct drm_nouveau_private *dev_priv = dev->dev_private;
108
109	if (nv_two_heads(dev))
110		NVSetOwner(dev, dev_priv->crtc_owner);
111
112	NVLockVgaCrtcs(dev, true);
113}
114
115int
116nv04_display_create(struct drm_device *dev)
117{
118	struct drm_nouveau_private *dev_priv = dev->dev_private;
119	struct dcb_table *dcb = &dev_priv->vbios.dcb;
120	struct drm_connector *connector, *ct;
121	struct drm_encoder *encoder;
122	struct drm_crtc *crtc;
123	int i, ret;
124
125	NV_DEBUG_KMS(dev, "\n");
126
127	nouveau_hw_save_vga_fonts(dev, 1);
128
129	nv04_crtc_create(dev, 0);
130	if (nv_two_heads(dev))
131		nv04_crtc_create(dev, 1);
132
133	for (i = 0; i < dcb->entries; i++) {
134		struct dcb_entry *dcbent = &dcb->entry[i];
135
136		connector = nouveau_connector_create(dev, dcbent->connector);
137		if (IS_ERR(connector))
138			continue;
139
140		switch (dcbent->type) {
141		case OUTPUT_ANALOG:
142			ret = nv04_dac_create(connector, dcbent);
143			break;
144		case OUTPUT_LVDS:
145		case OUTPUT_TMDS:
146			ret = nv04_dfp_create(connector, dcbent);
147			break;
148		case OUTPUT_TV:
149			if (dcbent->location == DCB_LOC_ON_CHIP)
150				ret = nv17_tv_create(connector, dcbent);
151			else
152				ret = nv04_tv_create(connector, dcbent);
153			break;
154		default:
155			NV_WARN(dev, "DCB type %d not known\n", dcbent->type);
156			continue;
157		}
158
159		if (ret)
160			continue;
161	}
162
163	list_for_each_entry_safe(connector, ct,
164				 &dev->mode_config.connector_list, head) {
165		if (!connector->encoder_ids[0]) {
166			NV_WARN(dev, "%s has no encoders, removing\n",
167				drm_get_connector_name(connector));
168			connector->funcs->destroy(connector);
169		}
170	}
171
172	/* Save previous state */
173	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
174		crtc->funcs->save(crtc);
175
176	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
177		struct drm_encoder_helper_funcs *func = encoder->helper_private;
178
179		func->save(encoder);
180	}
181
182	nouveau_irq_register(dev, 24, nv04_vblank_crtc0_isr);
183	nouveau_irq_register(dev, 25, nv04_vblank_crtc1_isr);
184	return 0;
185}
186
187void
188nv04_display_destroy(struct drm_device *dev)
189{
190	struct drm_encoder *encoder;
191	struct drm_crtc *crtc;
192
193	NV_DEBUG_KMS(dev, "\n");
194
195	nouveau_irq_unregister(dev, 24);
196	nouveau_irq_unregister(dev, 25);
197
198	/* Turn every CRTC off. */
199	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
200		struct drm_mode_set modeset = {
201			.crtc = crtc,
202		};
203
204		crtc->funcs->set_config(&modeset);
205	}
206
207	/* Restore state */
208	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
209		struct drm_encoder_helper_funcs *func = encoder->helper_private;
210
211		func->restore(encoder);
212	}
213
214	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
215		crtc->funcs->restore(crtc);
216
217	nouveau_hw_save_vga_fonts(dev, 0);
218}
219
220int
221nv04_display_init(struct drm_device *dev)
222{
223	struct drm_encoder *encoder;
224	struct drm_crtc *crtc;
225
226	/* meh.. modeset apparently doesn't setup all the regs and depends
227	 * on pre-existing state, for now load the state of the card *before*
228	 * nouveau was loaded, and then do a modeset.
229	 *
230	 * best thing to do probably is to make save/restore routines not
231	 * save/restore "pre-load" state, but more general so we can save
232	 * on suspend too.
233	 */
234	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
235		struct drm_encoder_helper_funcs *func = encoder->helper_private;
236
237		func->restore(encoder);
238	}
239
240	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
241		crtc->funcs->restore(crtc);
242
243	return 0;
244}
245
246void
247nv04_display_fini(struct drm_device *dev)
248{
249}
250
251static void
252nv04_vblank_crtc0_isr(struct drm_device *dev)
253{
254	nv_wr32(dev, NV_CRTC0_INTSTAT, NV_CRTC_INTR_VBLANK);
255	drm_handle_vblank(dev, 0);
256}
257
258static void
259nv04_vblank_crtc1_isr(struct drm_device *dev)
260{
261	nv_wr32(dev, NV_CRTC1_INTSTAT, NV_CRTC_INTR_VBLANK);
262	drm_handle_vblank(dev, 1);
263}
264