1 /*
2  * Copyright 2007-8 Advanced Micro Devices, Inc.
3  * Copyright 2008 Red Hat Inc.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included in
13  * all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  *
23  * Authors: Dave Airlie
24  *          Alex Deucher
25  */
26 
27 #include <drm/drm_crtc_helper.h>
28 #include <drm/amdgpu_drm.h>
29 #include "amdgpu.h"
30 #include "amdgpu_connectors.h"
31 #include "amdgpu_display.h"
32 #include "atom.h"
33 #include "atombios_encoders.h"
34 
35 void
36 amdgpu_link_encoder_connector(struct drm_device *dev)
37 {
38 	struct amdgpu_device *adev = dev->dev_private;
39 	struct drm_connector *connector;
40 	struct drm_connector_list_iter iter;
41 	struct amdgpu_connector *amdgpu_connector;
42 	struct drm_encoder *encoder;
43 	struct amdgpu_encoder *amdgpu_encoder;
44 
45 	drm_connector_list_iter_begin(dev, &iter);
46 	/* walk the list and link encoders to connectors */
47 	drm_for_each_connector_iter(connector, &iter) {
48 		amdgpu_connector = to_amdgpu_connector(connector);
49 		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
50 			amdgpu_encoder = to_amdgpu_encoder(encoder);
51 			if (amdgpu_encoder->devices & amdgpu_connector->devices) {
52 				drm_connector_attach_encoder(connector, encoder);
53 				if (amdgpu_encoder->devices & (ATOM_DEVICE_LCD_SUPPORT)) {
54 					amdgpu_atombios_encoder_init_backlight(amdgpu_encoder, connector);
55 					adev->mode_info.bl_encoder = amdgpu_encoder;
56 				}
57 			}
58 		}
59 	}
60 	drm_connector_list_iter_end(&iter);
61 }
62 
63 void amdgpu_encoder_set_active_device(struct drm_encoder *encoder)
64 {
65 	struct drm_device *dev = encoder->dev;
66 	struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
67 	struct drm_connector *connector;
68 	struct drm_connector_list_iter iter;
69 
70 	drm_connector_list_iter_begin(dev, &iter);
71 	drm_for_each_connector_iter(connector, &iter) {
72 		if (connector->encoder == encoder) {
73 			struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
74 			amdgpu_encoder->active_device = amdgpu_encoder->devices & amdgpu_connector->devices;
75 			DRM_DEBUG_KMS("setting active device to %08x from %08x %08x for encoder %d\n",
76 				  amdgpu_encoder->active_device, amdgpu_encoder->devices,
77 				  amdgpu_connector->devices, encoder->encoder_type);
78 		}
79 	}
80 	drm_connector_list_iter_end(&iter);
81 }
82 
83 struct drm_connector *
84 amdgpu_get_connector_for_encoder(struct drm_encoder *encoder)
85 {
86 	struct drm_device *dev = encoder->dev;
87 	struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
88 	struct drm_connector *connector, *found = NULL;
89 	struct drm_connector_list_iter iter;
90 	struct amdgpu_connector *amdgpu_connector;
91 
92 	drm_connector_list_iter_begin(dev, &iter);
93 	drm_for_each_connector_iter(connector, &iter) {
94 		amdgpu_connector = to_amdgpu_connector(connector);
95 		if (amdgpu_encoder->active_device & amdgpu_connector->devices) {
96 			found = connector;
97 			break;
98 		}
99 	}
100 	drm_connector_list_iter_end(&iter);
101 	return found;
102 }
103 
104 struct drm_connector *
105 amdgpu_get_connector_for_encoder_init(struct drm_encoder *encoder)
106 {
107 	struct drm_device *dev = encoder->dev;
108 	struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
109 	struct drm_connector *connector, *found = NULL;
110 	struct drm_connector_list_iter iter;
111 	struct amdgpu_connector *amdgpu_connector;
112 
113 	drm_connector_list_iter_begin(dev, &iter);
114 	drm_for_each_connector_iter(connector, &iter) {
115 		amdgpu_connector = to_amdgpu_connector(connector);
116 		if (amdgpu_encoder->devices & amdgpu_connector->devices) {
117 			found = connector;
118 			break;
119 		}
120 	}
121 	drm_connector_list_iter_end(&iter);
122 	return found;
123 }
124 
125 struct drm_encoder *amdgpu_get_external_encoder(struct drm_encoder *encoder)
126 {
127 	struct drm_device *dev = encoder->dev;
128 	struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
129 	struct drm_encoder *other_encoder;
130 	struct amdgpu_encoder *other_amdgpu_encoder;
131 
132 	if (amdgpu_encoder->is_ext_encoder)
133 		return NULL;
134 
135 	list_for_each_entry(other_encoder, &dev->mode_config.encoder_list, head) {
136 		if (other_encoder == encoder)
137 			continue;
138 		other_amdgpu_encoder = to_amdgpu_encoder(other_encoder);
139 		if (other_amdgpu_encoder->is_ext_encoder &&
140 		    (amdgpu_encoder->devices & other_amdgpu_encoder->devices))
141 			return other_encoder;
142 	}
143 	return NULL;
144 }
145 
146 u16 amdgpu_encoder_get_dp_bridge_encoder_id(struct drm_encoder *encoder)
147 {
148 	struct drm_encoder *other_encoder = amdgpu_get_external_encoder(encoder);
149 
150 	if (other_encoder) {
151 		struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(other_encoder);
152 
153 		switch (amdgpu_encoder->encoder_id) {
154 		case ENCODER_OBJECT_ID_TRAVIS:
155 		case ENCODER_OBJECT_ID_NUTMEG:
156 			return amdgpu_encoder->encoder_id;
157 		default:
158 			return ENCODER_OBJECT_ID_NONE;
159 		}
160 	}
161 	return ENCODER_OBJECT_ID_NONE;
162 }
163 
164 void amdgpu_panel_mode_fixup(struct drm_encoder *encoder,
165 			     struct drm_display_mode *adjusted_mode)
166 {
167 	struct amdgpu_encoder *amdgpu_encoder = to_amdgpu_encoder(encoder);
168 	struct drm_display_mode *native_mode = &amdgpu_encoder->native_mode;
169 	unsigned hblank = native_mode->htotal - native_mode->hdisplay;
170 	unsigned vblank = native_mode->vtotal - native_mode->vdisplay;
171 	unsigned hover = native_mode->hsync_start - native_mode->hdisplay;
172 	unsigned vover = native_mode->vsync_start - native_mode->vdisplay;
173 	unsigned hsync_width = native_mode->hsync_end - native_mode->hsync_start;
174 	unsigned vsync_width = native_mode->vsync_end - native_mode->vsync_start;
175 
176 	adjusted_mode->clock = native_mode->clock;
177 	adjusted_mode->flags = native_mode->flags;
178 
179 	adjusted_mode->hdisplay = native_mode->hdisplay;
180 	adjusted_mode->vdisplay = native_mode->vdisplay;
181 
182 	adjusted_mode->htotal = native_mode->hdisplay + hblank;
183 	adjusted_mode->hsync_start = native_mode->hdisplay + hover;
184 	adjusted_mode->hsync_end = adjusted_mode->hsync_start + hsync_width;
185 
186 	adjusted_mode->vtotal = native_mode->vdisplay + vblank;
187 	adjusted_mode->vsync_start = native_mode->vdisplay + vover;
188 	adjusted_mode->vsync_end = adjusted_mode->vsync_start + vsync_width;
189 
190 	drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
191 
192 	adjusted_mode->crtc_hdisplay = native_mode->hdisplay;
193 	adjusted_mode->crtc_vdisplay = native_mode->vdisplay;
194 
195 	adjusted_mode->crtc_htotal = adjusted_mode->crtc_hdisplay + hblank;
196 	adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hdisplay + hover;
197 	adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + hsync_width;
198 
199 	adjusted_mode->crtc_vtotal = adjusted_mode->crtc_vdisplay + vblank;
200 	adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vdisplay + vover;
201 	adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + vsync_width;
202 
203 }
204 
205 bool amdgpu_dig_monitor_is_duallink(struct drm_encoder *encoder,
206 				    u32 pixel_clock)
207 {
208 	struct drm_connector *connector;
209 	struct amdgpu_connector *amdgpu_connector;
210 	struct amdgpu_connector_atom_dig *dig_connector;
211 
212 	connector = amdgpu_get_connector_for_encoder(encoder);
213 	/* if we don't have an active device yet, just use one of
214 	 * the connectors tied to the encoder.
215 	 */
216 	if (!connector)
217 		connector = amdgpu_get_connector_for_encoder_init(encoder);
218 	amdgpu_connector = to_amdgpu_connector(connector);
219 
220 	switch (connector->connector_type) {
221 	case DRM_MODE_CONNECTOR_DVII:
222 	case DRM_MODE_CONNECTOR_HDMIB:
223 		if (amdgpu_connector->use_digital) {
224 			/* HDMI 1.3 supports up to 340 Mhz over single link */
225 			if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
226 				if (pixel_clock > 340000)
227 					return true;
228 				else
229 					return false;
230 			} else {
231 				if (pixel_clock > 165000)
232 					return true;
233 				else
234 					return false;
235 			}
236 		} else
237 			return false;
238 	case DRM_MODE_CONNECTOR_DVID:
239 	case DRM_MODE_CONNECTOR_HDMIA:
240 	case DRM_MODE_CONNECTOR_DisplayPort:
241 		dig_connector = amdgpu_connector->con_priv;
242 		if ((dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_DISPLAYPORT) ||
243 		    (dig_connector->dp_sink_type == CONNECTOR_OBJECT_ID_eDP))
244 			return false;
245 		else {
246 			/* HDMI 1.3 supports up to 340 Mhz over single link */
247 			if (drm_detect_hdmi_monitor(amdgpu_connector_edid(connector))) {
248 				if (pixel_clock > 340000)
249 					return true;
250 				else
251 					return false;
252 			} else {
253 				if (pixel_clock > 165000)
254 					return true;
255 				else
256 					return false;
257 			}
258 		}
259 	default:
260 		return false;
261 	}
262 }
263