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a3376e3e RC |
1 | /* |
2 | * Copyright (C) 2013 Red Hat | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
18 | #include "hdmi.h" | |
19 | ||
20 | struct hdmi_bridge { | |
21 | struct drm_bridge base; | |
22 | ||
23 | struct hdmi *hdmi; | |
dada25bd | 24 | bool power_on; |
a3376e3e RC |
25 | |
26 | unsigned long int pixclock; | |
27 | }; | |
28 | #define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base) | |
29 | ||
30 | static void hdmi_bridge_destroy(struct drm_bridge *bridge) | |
31 | { | |
32 | struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); | |
33 | hdmi_unreference(hdmi_bridge->hdmi); | |
34 | drm_bridge_cleanup(bridge); | |
35 | kfree(hdmi_bridge); | |
36 | } | |
37 | ||
dada25bd RC |
38 | static void power_on(struct drm_bridge *bridge) |
39 | { | |
40 | struct drm_device *dev = bridge->dev; | |
41 | struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); | |
42 | struct hdmi *hdmi = hdmi_bridge->hdmi; | |
43 | const struct hdmi_platform_config *config = hdmi->config; | |
44 | int i, ret; | |
45 | ||
46 | for (i = 0; i < config->pwr_reg_cnt; i++) { | |
47 | ret = regulator_enable(hdmi->pwr_regs[i]); | |
48 | if (ret) { | |
49 | dev_err(dev->dev, "failed to enable pwr regulator: %s (%d)\n", | |
50 | config->pwr_reg_names[i], ret); | |
51 | } | |
52 | } | |
53 | ||
54 | if (config->pwr_clk_cnt > 0) { | |
55 | DBG("pixclock: %lu", hdmi_bridge->pixclock); | |
56 | ret = clk_set_rate(hdmi->pwr_clks[0], hdmi_bridge->pixclock); | |
57 | if (ret) { | |
58 | dev_err(dev->dev, "failed to set pixel clk: %s (%d)\n", | |
59 | config->pwr_clk_names[0], ret); | |
60 | } | |
61 | } | |
62 | ||
63 | for (i = 0; i < config->pwr_clk_cnt; i++) { | |
64 | ret = clk_prepare_enable(hdmi->pwr_clks[i]); | |
65 | if (ret) { | |
66 | dev_err(dev->dev, "failed to enable pwr clk: %s (%d)\n", | |
67 | config->pwr_clk_names[i], ret); | |
68 | } | |
69 | } | |
70 | } | |
71 | ||
72 | static void power_off(struct drm_bridge *bridge) | |
73 | { | |
74 | struct drm_device *dev = bridge->dev; | |
75 | struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); | |
76 | struct hdmi *hdmi = hdmi_bridge->hdmi; | |
77 | const struct hdmi_platform_config *config = hdmi->config; | |
78 | int i, ret; | |
79 | ||
80 | /* TODO do we need to wait for final vblank somewhere before | |
81 | * cutting the clocks? | |
82 | */ | |
83 | mdelay(16 + 4); | |
84 | ||
85 | for (i = 0; i < config->pwr_clk_cnt; i++) | |
86 | clk_disable_unprepare(hdmi->pwr_clks[i]); | |
87 | ||
88 | for (i = 0; i < config->pwr_reg_cnt; i++) { | |
89 | ret = regulator_disable(hdmi->pwr_regs[i]); | |
90 | if (ret) { | |
91 | dev_err(dev->dev, "failed to disable pwr regulator: %s (%d)\n", | |
92 | config->pwr_reg_names[i], ret); | |
93 | } | |
94 | } | |
95 | } | |
96 | ||
a3376e3e RC |
97 | static void hdmi_bridge_pre_enable(struct drm_bridge *bridge) |
98 | { | |
99 | struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); | |
100 | struct hdmi *hdmi = hdmi_bridge->hdmi; | |
101 | struct hdmi_phy *phy = hdmi->phy; | |
102 | ||
103 | DBG("power up"); | |
dada25bd RC |
104 | |
105 | if (!hdmi_bridge->power_on) { | |
106 | power_on(bridge); | |
107 | hdmi_bridge->power_on = true; | |
108 | } | |
109 | ||
a3376e3e RC |
110 | phy->funcs->powerup(phy, hdmi_bridge->pixclock); |
111 | hdmi_set_mode(hdmi, true); | |
112 | } | |
113 | ||
114 | static void hdmi_bridge_enable(struct drm_bridge *bridge) | |
115 | { | |
116 | } | |
117 | ||
118 | static void hdmi_bridge_disable(struct drm_bridge *bridge) | |
119 | { | |
120 | } | |
121 | ||
122 | static void hdmi_bridge_post_disable(struct drm_bridge *bridge) | |
123 | { | |
124 | struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); | |
125 | struct hdmi *hdmi = hdmi_bridge->hdmi; | |
126 | struct hdmi_phy *phy = hdmi->phy; | |
127 | ||
128 | DBG("power down"); | |
129 | hdmi_set_mode(hdmi, false); | |
130 | phy->funcs->powerdown(phy); | |
dada25bd RC |
131 | |
132 | if (hdmi_bridge->power_on) { | |
133 | power_off(bridge); | |
134 | hdmi_bridge->power_on = false; | |
135 | } | |
a3376e3e RC |
136 | } |
137 | ||
138 | static void hdmi_bridge_mode_set(struct drm_bridge *bridge, | |
139 | struct drm_display_mode *mode, | |
140 | struct drm_display_mode *adjusted_mode) | |
141 | { | |
142 | struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); | |
143 | struct hdmi *hdmi = hdmi_bridge->hdmi; | |
144 | int hstart, hend, vstart, vend; | |
145 | uint32_t frame_ctrl; | |
146 | ||
147 | mode = adjusted_mode; | |
148 | ||
149 | hdmi_bridge->pixclock = mode->clock * 1000; | |
150 | ||
151 | hdmi->hdmi_mode = drm_match_cea_mode(mode) > 1; | |
152 | ||
153 | hstart = mode->htotal - mode->hsync_start; | |
154 | hend = mode->htotal - mode->hsync_start + mode->hdisplay; | |
155 | ||
156 | vstart = mode->vtotal - mode->vsync_start - 1; | |
157 | vend = mode->vtotal - mode->vsync_start + mode->vdisplay - 1; | |
158 | ||
159 | DBG("htotal=%d, vtotal=%d, hstart=%d, hend=%d, vstart=%d, vend=%d", | |
160 | mode->htotal, mode->vtotal, hstart, hend, vstart, vend); | |
161 | ||
162 | hdmi_write(hdmi, REG_HDMI_TOTAL, | |
163 | HDMI_TOTAL_H_TOTAL(mode->htotal - 1) | | |
164 | HDMI_TOTAL_V_TOTAL(mode->vtotal - 1)); | |
165 | ||
166 | hdmi_write(hdmi, REG_HDMI_ACTIVE_HSYNC, | |
167 | HDMI_ACTIVE_HSYNC_START(hstart) | | |
168 | HDMI_ACTIVE_HSYNC_END(hend)); | |
169 | hdmi_write(hdmi, REG_HDMI_ACTIVE_VSYNC, | |
170 | HDMI_ACTIVE_VSYNC_START(vstart) | | |
171 | HDMI_ACTIVE_VSYNC_END(vend)); | |
172 | ||
173 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) { | |
174 | hdmi_write(hdmi, REG_HDMI_VSYNC_TOTAL_F2, | |
175 | HDMI_VSYNC_TOTAL_F2_V_TOTAL(mode->vtotal)); | |
176 | hdmi_write(hdmi, REG_HDMI_VSYNC_ACTIVE_F2, | |
177 | HDMI_VSYNC_ACTIVE_F2_START(vstart + 1) | | |
178 | HDMI_VSYNC_ACTIVE_F2_END(vend + 1)); | |
179 | } else { | |
180 | hdmi_write(hdmi, REG_HDMI_VSYNC_TOTAL_F2, | |
181 | HDMI_VSYNC_TOTAL_F2_V_TOTAL(0)); | |
182 | hdmi_write(hdmi, REG_HDMI_VSYNC_ACTIVE_F2, | |
183 | HDMI_VSYNC_ACTIVE_F2_START(0) | | |
184 | HDMI_VSYNC_ACTIVE_F2_END(0)); | |
185 | } | |
186 | ||
187 | frame_ctrl = 0; | |
188 | if (mode->flags & DRM_MODE_FLAG_NHSYNC) | |
189 | frame_ctrl |= HDMI_FRAME_CTRL_HSYNC_LOW; | |
190 | if (mode->flags & DRM_MODE_FLAG_NVSYNC) | |
191 | frame_ctrl |= HDMI_FRAME_CTRL_VSYNC_LOW; | |
192 | if (mode->flags & DRM_MODE_FLAG_INTERLACE) | |
193 | frame_ctrl |= HDMI_FRAME_CTRL_INTERLACED_EN; | |
194 | DBG("frame_ctrl=%08x", frame_ctrl); | |
195 | hdmi_write(hdmi, REG_HDMI_FRAME_CTRL, frame_ctrl); | |
196 | ||
197 | // TODO until we have audio, this might be safest: | |
198 | if (hdmi->hdmi_mode) | |
199 | hdmi_write(hdmi, REG_HDMI_GC, HDMI_GC_MUTE); | |
200 | } | |
201 | ||
202 | static const struct drm_bridge_funcs hdmi_bridge_funcs = { | |
203 | .pre_enable = hdmi_bridge_pre_enable, | |
204 | .enable = hdmi_bridge_enable, | |
205 | .disable = hdmi_bridge_disable, | |
206 | .post_disable = hdmi_bridge_post_disable, | |
207 | .mode_set = hdmi_bridge_mode_set, | |
208 | .destroy = hdmi_bridge_destroy, | |
209 | }; | |
210 | ||
211 | ||
212 | /* initialize bridge */ | |
213 | struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi) | |
214 | { | |
215 | struct drm_bridge *bridge = NULL; | |
216 | struct hdmi_bridge *hdmi_bridge; | |
217 | int ret; | |
218 | ||
219 | hdmi_bridge = kzalloc(sizeof(*hdmi_bridge), GFP_KERNEL); | |
220 | if (!hdmi_bridge) { | |
221 | ret = -ENOMEM; | |
222 | goto fail; | |
223 | } | |
224 | ||
225 | hdmi_bridge->hdmi = hdmi_reference(hdmi); | |
226 | ||
227 | bridge = &hdmi_bridge->base; | |
228 | ||
229 | drm_bridge_init(hdmi->dev, bridge, &hdmi_bridge_funcs); | |
230 | ||
231 | return bridge; | |
232 | ||
233 | fail: | |
234 | if (bridge) | |
235 | hdmi_bridge_destroy(bridge); | |
236 | ||
237 | return ERR_PTR(ret); | |
238 | } |