Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <linux/delay.h>
8
9#include "hdmi.h"
10
11struct hdmi_bridge {
12 struct drm_bridge base;
13 struct hdmi *hdmi;
14};
15#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)
16
17void msm_hdmi_bridge_destroy(struct drm_bridge *bridge)
18{
19}
20
21static void msm_hdmi_power_on(struct drm_bridge *bridge)
22{
23 struct drm_device *dev = bridge->dev;
24 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
25 struct hdmi *hdmi = hdmi_bridge->hdmi;
26 const struct hdmi_platform_config *config = hdmi->config;
27 int i, ret;
28
29 pm_runtime_get_sync(&hdmi->pdev->dev);
30
31 for (i = 0; i < config->pwr_reg_cnt; i++) {
32 ret = regulator_enable(hdmi->pwr_regs[i]);
33 if (ret) {
34 DRM_DEV_ERROR(dev->dev, "failed to enable pwr regulator: %s (%d)\n",
35 config->pwr_reg_names[i], ret);
36 }
37 }
38
39 if (config->pwr_clk_cnt > 0) {
40 DBG("pixclock: %lu", hdmi->pixclock);
41 ret = clk_set_rate(hdmi->pwr_clks[0], hdmi->pixclock);
42 if (ret) {
43 DRM_DEV_ERROR(dev->dev, "failed to set pixel clk: %s (%d)\n",
44 config->pwr_clk_names[0], ret);
45 }
46 }
47
48 for (i = 0; i < config->pwr_clk_cnt; i++) {
49 ret = clk_prepare_enable(hdmi->pwr_clks[i]);
50 if (ret) {
51 DRM_DEV_ERROR(dev->dev, "failed to enable pwr clk: %s (%d)\n",
52 config->pwr_clk_names[i], ret);
53 }
54 }
55}
56
57static void power_off(struct drm_bridge *bridge)
58{
59 struct drm_device *dev = bridge->dev;
60 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
61 struct hdmi *hdmi = hdmi_bridge->hdmi;
62 const struct hdmi_platform_config *config = hdmi->config;
63 int i, ret;
64
65 /* TODO do we need to wait for final vblank somewhere before
66 * cutting the clocks?
67 */
68 mdelay(16 + 4);
69
70 for (i = 0; i < config->pwr_clk_cnt; i++)
71 clk_disable_unprepare(hdmi->pwr_clks[i]);
72
73 for (i = 0; i < config->pwr_reg_cnt; i++) {
74 ret = regulator_disable(hdmi->pwr_regs[i]);
75 if (ret) {
76 DRM_DEV_ERROR(dev->dev, "failed to disable pwr regulator: %s (%d)\n",
77 config->pwr_reg_names[i], ret);
78 }
79 }
80
81 pm_runtime_put_autosuspend(&hdmi->pdev->dev);
82}
83
84#define AVI_IFRAME_LINE_NUMBER 1
85
86static void msm_hdmi_config_avi_infoframe(struct hdmi *hdmi)
87{
88 struct drm_crtc *crtc = hdmi->encoder->crtc;
89 const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
90 union hdmi_infoframe frame;
91 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
92 u32 val;
93 int len;
94
95 drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
96 hdmi->connector, mode);
97
98 len = hdmi_infoframe_pack(&frame, buffer, sizeof(buffer));
99 if (len < 0) {
100 DRM_DEV_ERROR(&hdmi->pdev->dev,
101 "failed to configure avi infoframe\n");
102 return;
103 }
104
105 /*
106 * the AVI_INFOx registers don't map exactly to how the AVI infoframes
107 * are packed according to the spec. The checksum from the header is
108 * written to the LSB byte of AVI_INFO0 and the version is written to
109 * the third byte from the LSB of AVI_INFO3
110 */
111 hdmi_write(hdmi, REG_HDMI_AVI_INFO(0),
112 buffer[3] |
113 buffer[4] << 8 |
114 buffer[5] << 16 |
115 buffer[6] << 24);
116
117 hdmi_write(hdmi, REG_HDMI_AVI_INFO(1),
118 buffer[7] |
119 buffer[8] << 8 |
120 buffer[9] << 16 |
121 buffer[10] << 24);
122
123 hdmi_write(hdmi, REG_HDMI_AVI_INFO(2),
124 buffer[11] |
125 buffer[12] << 8 |
126 buffer[13] << 16 |
127 buffer[14] << 24);
128
129 hdmi_write(hdmi, REG_HDMI_AVI_INFO(3),
130 buffer[15] |
131 buffer[16] << 8 |
132 buffer[1] << 24);
133
134 hdmi_write(hdmi, REG_HDMI_INFOFRAME_CTRL0,
135 HDMI_INFOFRAME_CTRL0_AVI_SEND |
136 HDMI_INFOFRAME_CTRL0_AVI_CONT);
137
138 val = hdmi_read(hdmi, REG_HDMI_INFOFRAME_CTRL1);
139 val &= ~HDMI_INFOFRAME_CTRL1_AVI_INFO_LINE__MASK;
140 val |= HDMI_INFOFRAME_CTRL1_AVI_INFO_LINE(AVI_IFRAME_LINE_NUMBER);
141 hdmi_write(hdmi, REG_HDMI_INFOFRAME_CTRL1, val);
142}
143
144static void msm_hdmi_bridge_pre_enable(struct drm_bridge *bridge)
145{
146 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
147 struct hdmi *hdmi = hdmi_bridge->hdmi;
148 struct hdmi_phy *phy = hdmi->phy;
149
150 DBG("power up");
151
152 if (!hdmi->power_on) {
153 msm_hdmi_phy_resource_enable(phy);
154 msm_hdmi_power_on(bridge);
155 hdmi->power_on = true;
156 if (hdmi->hdmi_mode) {
157 msm_hdmi_config_avi_infoframe(hdmi);
158 msm_hdmi_audio_update(hdmi);
159 }
160 }
161
162 msm_hdmi_phy_powerup(phy, hdmi->pixclock);
163
164 msm_hdmi_set_mode(hdmi, true);
165
166 if (hdmi->hdcp_ctrl)
167 msm_hdmi_hdcp_on(hdmi->hdcp_ctrl);
168}
169
170static void msm_hdmi_bridge_enable(struct drm_bridge *bridge)
171{
172}
173
174static void msm_hdmi_bridge_disable(struct drm_bridge *bridge)
175{
176}
177
178static void msm_hdmi_bridge_post_disable(struct drm_bridge *bridge)
179{
180 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
181 struct hdmi *hdmi = hdmi_bridge->hdmi;
182 struct hdmi_phy *phy = hdmi->phy;
183
184 if (hdmi->hdcp_ctrl)
185 msm_hdmi_hdcp_off(hdmi->hdcp_ctrl);
186
187 DBG("power down");
188 msm_hdmi_set_mode(hdmi, false);
189
190 msm_hdmi_phy_powerdown(phy);
191
192 if (hdmi->power_on) {
193 power_off(bridge);
194 hdmi->power_on = false;
195 if (hdmi->hdmi_mode)
196 msm_hdmi_audio_update(hdmi);
197 msm_hdmi_phy_resource_disable(phy);
198 }
199}
200
201static void msm_hdmi_bridge_mode_set(struct drm_bridge *bridge,
202 const struct drm_display_mode *mode,
203 const struct drm_display_mode *adjusted_mode)
204{
205 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
206 struct hdmi *hdmi = hdmi_bridge->hdmi;
207 int hstart, hend, vstart, vend;
208 uint32_t frame_ctrl;
209
210 mode = adjusted_mode;
211
212 hdmi->pixclock = mode->clock * 1000;
213
214 hstart = mode->htotal - mode->hsync_start;
215 hend = mode->htotal - mode->hsync_start + mode->hdisplay;
216
217 vstart = mode->vtotal - mode->vsync_start - 1;
218 vend = mode->vtotal - mode->vsync_start + mode->vdisplay - 1;
219
220 DBG("htotal=%d, vtotal=%d, hstart=%d, hend=%d, vstart=%d, vend=%d",
221 mode->htotal, mode->vtotal, hstart, hend, vstart, vend);
222
223 hdmi_write(hdmi, REG_HDMI_TOTAL,
224 HDMI_TOTAL_H_TOTAL(mode->htotal - 1) |
225 HDMI_TOTAL_V_TOTAL(mode->vtotal - 1));
226
227 hdmi_write(hdmi, REG_HDMI_ACTIVE_HSYNC,
228 HDMI_ACTIVE_HSYNC_START(hstart) |
229 HDMI_ACTIVE_HSYNC_END(hend));
230 hdmi_write(hdmi, REG_HDMI_ACTIVE_VSYNC,
231 HDMI_ACTIVE_VSYNC_START(vstart) |
232 HDMI_ACTIVE_VSYNC_END(vend));
233
234 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
235 hdmi_write(hdmi, REG_HDMI_VSYNC_TOTAL_F2,
236 HDMI_VSYNC_TOTAL_F2_V_TOTAL(mode->vtotal));
237 hdmi_write(hdmi, REG_HDMI_VSYNC_ACTIVE_F2,
238 HDMI_VSYNC_ACTIVE_F2_START(vstart + 1) |
239 HDMI_VSYNC_ACTIVE_F2_END(vend + 1));
240 } else {
241 hdmi_write(hdmi, REG_HDMI_VSYNC_TOTAL_F2,
242 HDMI_VSYNC_TOTAL_F2_V_TOTAL(0));
243 hdmi_write(hdmi, REG_HDMI_VSYNC_ACTIVE_F2,
244 HDMI_VSYNC_ACTIVE_F2_START(0) |
245 HDMI_VSYNC_ACTIVE_F2_END(0));
246 }
247
248 frame_ctrl = 0;
249 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
250 frame_ctrl |= HDMI_FRAME_CTRL_HSYNC_LOW;
251 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
252 frame_ctrl |= HDMI_FRAME_CTRL_VSYNC_LOW;
253 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
254 frame_ctrl |= HDMI_FRAME_CTRL_INTERLACED_EN;
255 DBG("frame_ctrl=%08x", frame_ctrl);
256 hdmi_write(hdmi, REG_HDMI_FRAME_CTRL, frame_ctrl);
257
258 if (hdmi->hdmi_mode)
259 msm_hdmi_audio_update(hdmi);
260}
261
262static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = {
263 .pre_enable = msm_hdmi_bridge_pre_enable,
264 .enable = msm_hdmi_bridge_enable,
265 .disable = msm_hdmi_bridge_disable,
266 .post_disable = msm_hdmi_bridge_post_disable,
267 .mode_set = msm_hdmi_bridge_mode_set,
268};
269
270
271/* initialize bridge */
272struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi)
273{
274 struct drm_bridge *bridge = NULL;
275 struct hdmi_bridge *hdmi_bridge;
276 int ret;
277
278 hdmi_bridge = devm_kzalloc(hdmi->dev->dev,
279 sizeof(*hdmi_bridge), GFP_KERNEL);
280 if (!hdmi_bridge) {
281 ret = -ENOMEM;
282 goto fail;
283 }
284
285 hdmi_bridge->hdmi = hdmi;
286
287 bridge = &hdmi_bridge->base;
288 bridge->funcs = &msm_hdmi_bridge_funcs;
289
290 ret = drm_bridge_attach(hdmi->encoder, bridge, NULL);
291 if (ret)
292 goto fail;
293
294 return bridge;
295
296fail:
297 if (bridge)
298 msm_hdmi_bridge_destroy(bridge);
299
300 return ERR_PTR(ret);
301}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
5 */
6
7#include <linux/delay.h>
8#include <drm/drm_bridge_connector.h>
9#include <drm/drm_edid.h>
10
11#include "msm_kms.h"
12#include "hdmi.h"
13
14void msm_hdmi_bridge_destroy(struct drm_bridge *bridge)
15{
16 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
17
18 msm_hdmi_hpd_disable(hdmi_bridge);
19 drm_bridge_remove(bridge);
20}
21
22static void msm_hdmi_power_on(struct drm_bridge *bridge)
23{
24 struct drm_device *dev = bridge->dev;
25 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
26 struct hdmi *hdmi = hdmi_bridge->hdmi;
27 const struct hdmi_platform_config *config = hdmi->config;
28 int i, ret;
29
30 pm_runtime_get_sync(&hdmi->pdev->dev);
31
32 ret = regulator_bulk_enable(config->pwr_reg_cnt, hdmi->pwr_regs);
33 if (ret)
34 DRM_DEV_ERROR(dev->dev, "failed to enable pwr regulator: %d\n", ret);
35
36 if (config->pwr_clk_cnt > 0) {
37 DBG("pixclock: %lu", hdmi->pixclock);
38 ret = clk_set_rate(hdmi->pwr_clks[0], hdmi->pixclock);
39 if (ret) {
40 DRM_DEV_ERROR(dev->dev, "failed to set pixel clk: %s (%d)\n",
41 config->pwr_clk_names[0], ret);
42 }
43 }
44
45 for (i = 0; i < config->pwr_clk_cnt; i++) {
46 ret = clk_prepare_enable(hdmi->pwr_clks[i]);
47 if (ret) {
48 DRM_DEV_ERROR(dev->dev, "failed to enable pwr clk: %s (%d)\n",
49 config->pwr_clk_names[i], ret);
50 }
51 }
52}
53
54static void power_off(struct drm_bridge *bridge)
55{
56 struct drm_device *dev = bridge->dev;
57 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
58 struct hdmi *hdmi = hdmi_bridge->hdmi;
59 const struct hdmi_platform_config *config = hdmi->config;
60 int i, ret;
61
62 /* TODO do we need to wait for final vblank somewhere before
63 * cutting the clocks?
64 */
65 mdelay(16 + 4);
66
67 for (i = 0; i < config->pwr_clk_cnt; i++)
68 clk_disable_unprepare(hdmi->pwr_clks[i]);
69
70 ret = regulator_bulk_disable(config->pwr_reg_cnt, hdmi->pwr_regs);
71 if (ret)
72 DRM_DEV_ERROR(dev->dev, "failed to disable pwr regulator: %d\n", ret);
73
74 pm_runtime_put(&hdmi->pdev->dev);
75}
76
77#define AVI_IFRAME_LINE_NUMBER 1
78
79static void msm_hdmi_config_avi_infoframe(struct hdmi *hdmi)
80{
81 struct drm_crtc *crtc = hdmi->encoder->crtc;
82 const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
83 union hdmi_infoframe frame;
84 u8 buffer[HDMI_INFOFRAME_SIZE(AVI)];
85 u32 val;
86 int len;
87
88 drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
89 hdmi->connector, mode);
90
91 len = hdmi_infoframe_pack(&frame, buffer, sizeof(buffer));
92 if (len < 0) {
93 DRM_DEV_ERROR(&hdmi->pdev->dev,
94 "failed to configure avi infoframe\n");
95 return;
96 }
97
98 /*
99 * the AVI_INFOx registers don't map exactly to how the AVI infoframes
100 * are packed according to the spec. The checksum from the header is
101 * written to the LSB byte of AVI_INFO0 and the version is written to
102 * the third byte from the LSB of AVI_INFO3
103 */
104 hdmi_write(hdmi, REG_HDMI_AVI_INFO(0),
105 buffer[3] |
106 buffer[4] << 8 |
107 buffer[5] << 16 |
108 buffer[6] << 24);
109
110 hdmi_write(hdmi, REG_HDMI_AVI_INFO(1),
111 buffer[7] |
112 buffer[8] << 8 |
113 buffer[9] << 16 |
114 buffer[10] << 24);
115
116 hdmi_write(hdmi, REG_HDMI_AVI_INFO(2),
117 buffer[11] |
118 buffer[12] << 8 |
119 buffer[13] << 16 |
120 buffer[14] << 24);
121
122 hdmi_write(hdmi, REG_HDMI_AVI_INFO(3),
123 buffer[15] |
124 buffer[16] << 8 |
125 buffer[1] << 24);
126
127 hdmi_write(hdmi, REG_HDMI_INFOFRAME_CTRL0,
128 HDMI_INFOFRAME_CTRL0_AVI_SEND |
129 HDMI_INFOFRAME_CTRL0_AVI_CONT);
130
131 val = hdmi_read(hdmi, REG_HDMI_INFOFRAME_CTRL1);
132 val &= ~HDMI_INFOFRAME_CTRL1_AVI_INFO_LINE__MASK;
133 val |= HDMI_INFOFRAME_CTRL1_AVI_INFO_LINE(AVI_IFRAME_LINE_NUMBER);
134 hdmi_write(hdmi, REG_HDMI_INFOFRAME_CTRL1, val);
135}
136
137static void msm_hdmi_bridge_pre_enable(struct drm_bridge *bridge)
138{
139 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
140 struct hdmi *hdmi = hdmi_bridge->hdmi;
141 struct hdmi_phy *phy = hdmi->phy;
142
143 DBG("power up");
144
145 if (!hdmi->power_on) {
146 msm_hdmi_phy_resource_enable(phy);
147 msm_hdmi_power_on(bridge);
148 hdmi->power_on = true;
149 if (hdmi->hdmi_mode) {
150 msm_hdmi_config_avi_infoframe(hdmi);
151 msm_hdmi_audio_update(hdmi);
152 }
153 }
154
155 msm_hdmi_phy_powerup(phy, hdmi->pixclock);
156
157 msm_hdmi_set_mode(hdmi, true);
158
159 if (hdmi->hdcp_ctrl)
160 msm_hdmi_hdcp_on(hdmi->hdcp_ctrl);
161}
162
163static void msm_hdmi_bridge_post_disable(struct drm_bridge *bridge)
164{
165 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
166 struct hdmi *hdmi = hdmi_bridge->hdmi;
167 struct hdmi_phy *phy = hdmi->phy;
168
169 if (hdmi->hdcp_ctrl)
170 msm_hdmi_hdcp_off(hdmi->hdcp_ctrl);
171
172 DBG("power down");
173 msm_hdmi_set_mode(hdmi, false);
174
175 msm_hdmi_phy_powerdown(phy);
176
177 if (hdmi->power_on) {
178 power_off(bridge);
179 hdmi->power_on = false;
180 if (hdmi->hdmi_mode)
181 msm_hdmi_audio_update(hdmi);
182 msm_hdmi_phy_resource_disable(phy);
183 }
184}
185
186static void msm_hdmi_bridge_mode_set(struct drm_bridge *bridge,
187 const struct drm_display_mode *mode,
188 const struct drm_display_mode *adjusted_mode)
189{
190 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
191 struct hdmi *hdmi = hdmi_bridge->hdmi;
192 int hstart, hend, vstart, vend;
193 uint32_t frame_ctrl;
194
195 mode = adjusted_mode;
196
197 hdmi->pixclock = mode->clock * 1000;
198
199 hstart = mode->htotal - mode->hsync_start;
200 hend = mode->htotal - mode->hsync_start + mode->hdisplay;
201
202 vstart = mode->vtotal - mode->vsync_start - 1;
203 vend = mode->vtotal - mode->vsync_start + mode->vdisplay - 1;
204
205 DBG("htotal=%d, vtotal=%d, hstart=%d, hend=%d, vstart=%d, vend=%d",
206 mode->htotal, mode->vtotal, hstart, hend, vstart, vend);
207
208 hdmi_write(hdmi, REG_HDMI_TOTAL,
209 HDMI_TOTAL_H_TOTAL(mode->htotal - 1) |
210 HDMI_TOTAL_V_TOTAL(mode->vtotal - 1));
211
212 hdmi_write(hdmi, REG_HDMI_ACTIVE_HSYNC,
213 HDMI_ACTIVE_HSYNC_START(hstart) |
214 HDMI_ACTIVE_HSYNC_END(hend));
215 hdmi_write(hdmi, REG_HDMI_ACTIVE_VSYNC,
216 HDMI_ACTIVE_VSYNC_START(vstart) |
217 HDMI_ACTIVE_VSYNC_END(vend));
218
219 if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
220 hdmi_write(hdmi, REG_HDMI_VSYNC_TOTAL_F2,
221 HDMI_VSYNC_TOTAL_F2_V_TOTAL(mode->vtotal));
222 hdmi_write(hdmi, REG_HDMI_VSYNC_ACTIVE_F2,
223 HDMI_VSYNC_ACTIVE_F2_START(vstart + 1) |
224 HDMI_VSYNC_ACTIVE_F2_END(vend + 1));
225 } else {
226 hdmi_write(hdmi, REG_HDMI_VSYNC_TOTAL_F2,
227 HDMI_VSYNC_TOTAL_F2_V_TOTAL(0));
228 hdmi_write(hdmi, REG_HDMI_VSYNC_ACTIVE_F2,
229 HDMI_VSYNC_ACTIVE_F2_START(0) |
230 HDMI_VSYNC_ACTIVE_F2_END(0));
231 }
232
233 frame_ctrl = 0;
234 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
235 frame_ctrl |= HDMI_FRAME_CTRL_HSYNC_LOW;
236 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
237 frame_ctrl |= HDMI_FRAME_CTRL_VSYNC_LOW;
238 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
239 frame_ctrl |= HDMI_FRAME_CTRL_INTERLACED_EN;
240 DBG("frame_ctrl=%08x", frame_ctrl);
241 hdmi_write(hdmi, REG_HDMI_FRAME_CTRL, frame_ctrl);
242
243 if (hdmi->hdmi_mode)
244 msm_hdmi_audio_update(hdmi);
245}
246
247static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge *bridge,
248 struct drm_connector *connector)
249{
250 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
251 struct hdmi *hdmi = hdmi_bridge->hdmi;
252 struct edid *edid;
253 uint32_t hdmi_ctrl;
254
255 hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
256 hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
257
258 edid = drm_get_edid(connector, hdmi->i2c);
259
260 hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
261
262 hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
263
264 return edid;
265}
266
267static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
268 const struct drm_display_info *info,
269 const struct drm_display_mode *mode)
270{
271 struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
272 struct hdmi *hdmi = hdmi_bridge->hdmi;
273 const struct hdmi_platform_config *config = hdmi->config;
274 struct msm_drm_private *priv = bridge->dev->dev_private;
275 struct msm_kms *kms = priv->kms;
276 long actual, requested;
277
278 requested = 1000 * mode->clock;
279
280 /* for mdp5/apq8074, we manage our own pixel clk (as opposed to
281 * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
282 * instead):
283 */
284 if (kms->funcs->round_pixclk)
285 actual = kms->funcs->round_pixclk(kms,
286 requested, hdmi_bridge->hdmi->encoder);
287 else if (config->pwr_clk_cnt > 0)
288 actual = clk_round_rate(hdmi->pwr_clks[0], requested);
289 else
290 actual = requested;
291
292 DBG("requested=%ld, actual=%ld", requested, actual);
293
294 if (actual != requested)
295 return MODE_CLOCK_RANGE;
296
297 return 0;
298}
299
300static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = {
301 .pre_enable = msm_hdmi_bridge_pre_enable,
302 .post_disable = msm_hdmi_bridge_post_disable,
303 .mode_set = msm_hdmi_bridge_mode_set,
304 .mode_valid = msm_hdmi_bridge_mode_valid,
305 .get_edid = msm_hdmi_bridge_get_edid,
306 .detect = msm_hdmi_bridge_detect,
307};
308
309static void
310msm_hdmi_hotplug_work(struct work_struct *work)
311{
312 struct hdmi_bridge *hdmi_bridge =
313 container_of(work, struct hdmi_bridge, hpd_work);
314 struct drm_bridge *bridge = &hdmi_bridge->base;
315
316 drm_bridge_hpd_notify(bridge, drm_bridge_detect(bridge));
317}
318
319/* initialize bridge */
320struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi)
321{
322 struct drm_bridge *bridge = NULL;
323 struct hdmi_bridge *hdmi_bridge;
324 int ret;
325
326 hdmi_bridge = devm_kzalloc(hdmi->dev->dev,
327 sizeof(*hdmi_bridge), GFP_KERNEL);
328 if (!hdmi_bridge) {
329 ret = -ENOMEM;
330 goto fail;
331 }
332
333 hdmi_bridge->hdmi = hdmi;
334 INIT_WORK(&hdmi_bridge->hpd_work, msm_hdmi_hotplug_work);
335
336 bridge = &hdmi_bridge->base;
337 bridge->funcs = &msm_hdmi_bridge_funcs;
338 bridge->ddc = hdmi->i2c;
339 bridge->type = DRM_MODE_CONNECTOR_HDMIA;
340 bridge->ops = DRM_BRIDGE_OP_HPD |
341 DRM_BRIDGE_OP_DETECT |
342 DRM_BRIDGE_OP_EDID;
343
344 drm_bridge_add(bridge);
345
346 ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
347 if (ret)
348 goto fail;
349
350 return bridge;
351
352fail:
353 if (bridge)
354 msm_hdmi_bridge_destroy(bridge);
355
356 return ERR_PTR(ret);
357}