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 "mdp4_kms.h"
19
20 #include "drm_crtc.h"
21 #include "drm_crtc_helper.h"
22
23
24 struct mdp4_dtv_encoder {
25 struct drm_encoder base;
26 struct clk *hdmi_clk;
27 struct clk *mdp_clk;
28 unsigned long int pixclock;
29 bool enabled;
30 uint32_t bsc;
31 };
32 #define to_mdp4_dtv_encoder(x) container_of(x, struct mdp4_dtv_encoder, base)
33
get_kms(struct drm_encoder * encoder)34 static struct mdp4_kms *get_kms(struct drm_encoder *encoder)
35 {
36 struct msm_drm_private *priv = encoder->dev->dev_private;
37 return to_mdp4_kms(to_mdp_kms(priv->kms));
38 }
39
40 #ifdef DOWNSTREAM_CONFIG_MSM_BUS_SCALING
41 #include <mach/board.h>
42 /* not ironically named at all.. no, really.. */
bs_init(struct mdp4_dtv_encoder * mdp4_dtv_encoder)43 static void bs_init(struct mdp4_dtv_encoder *mdp4_dtv_encoder)
44 {
45 struct drm_device *dev = mdp4_dtv_encoder->base.dev;
46 struct lcdc_platform_data *dtv_pdata = mdp4_find_pdata("dtv.0");
47
48 if (!dtv_pdata) {
49 dev_err(dev->dev, "could not find dtv pdata\n");
50 return;
51 }
52
53 if (dtv_pdata->bus_scale_table) {
54 mdp4_dtv_encoder->bsc = msm_bus_scale_register_client(
55 dtv_pdata->bus_scale_table);
56 DBG("bus scale client: %08x", mdp4_dtv_encoder->bsc);
57 DBG("lcdc_power_save: %p", dtv_pdata->lcdc_power_save);
58 if (dtv_pdata->lcdc_power_save)
59 dtv_pdata->lcdc_power_save(1);
60 }
61 }
62
bs_fini(struct mdp4_dtv_encoder * mdp4_dtv_encoder)63 static void bs_fini(struct mdp4_dtv_encoder *mdp4_dtv_encoder)
64 {
65 if (mdp4_dtv_encoder->bsc) {
66 msm_bus_scale_unregister_client(mdp4_dtv_encoder->bsc);
67 mdp4_dtv_encoder->bsc = 0;
68 }
69 }
70
bs_set(struct mdp4_dtv_encoder * mdp4_dtv_encoder,int idx)71 static void bs_set(struct mdp4_dtv_encoder *mdp4_dtv_encoder, int idx)
72 {
73 if (mdp4_dtv_encoder->bsc) {
74 DBG("set bus scaling: %d", idx);
75 msm_bus_scale_client_update_request(mdp4_dtv_encoder->bsc, idx);
76 }
77 }
78 #else
bs_init(struct mdp4_dtv_encoder * mdp4_dtv_encoder)79 static void bs_init(struct mdp4_dtv_encoder *mdp4_dtv_encoder) {}
bs_fini(struct mdp4_dtv_encoder * mdp4_dtv_encoder)80 static void bs_fini(struct mdp4_dtv_encoder *mdp4_dtv_encoder) {}
bs_set(struct mdp4_dtv_encoder * mdp4_dtv_encoder,int idx)81 static void bs_set(struct mdp4_dtv_encoder *mdp4_dtv_encoder, int idx) {}
82 #endif
83
mdp4_dtv_encoder_destroy(struct drm_encoder * encoder)84 static void mdp4_dtv_encoder_destroy(struct drm_encoder *encoder)
85 {
86 struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
87 bs_fini(mdp4_dtv_encoder);
88 drm_encoder_cleanup(encoder);
89 kfree(mdp4_dtv_encoder);
90 }
91
92 static const struct drm_encoder_funcs mdp4_dtv_encoder_funcs = {
93 .destroy = mdp4_dtv_encoder_destroy,
94 };
95
mdp4_dtv_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)96 static void mdp4_dtv_encoder_mode_set(struct drm_encoder *encoder,
97 struct drm_display_mode *mode,
98 struct drm_display_mode *adjusted_mode)
99 {
100 struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
101 struct mdp4_kms *mdp4_kms = get_kms(encoder);
102 uint32_t dtv_hsync_skew, vsync_period, vsync_len, ctrl_pol;
103 uint32_t display_v_start, display_v_end;
104 uint32_t hsync_start_x, hsync_end_x;
105
106 mode = adjusted_mode;
107
108 DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
109 mode->base.id, mode->name,
110 mode->vrefresh, mode->clock,
111 mode->hdisplay, mode->hsync_start,
112 mode->hsync_end, mode->htotal,
113 mode->vdisplay, mode->vsync_start,
114 mode->vsync_end, mode->vtotal,
115 mode->type, mode->flags);
116
117 mdp4_dtv_encoder->pixclock = mode->clock * 1000;
118
119 DBG("pixclock=%lu", mdp4_dtv_encoder->pixclock);
120
121 ctrl_pol = 0;
122 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
123 ctrl_pol |= MDP4_DTV_CTRL_POLARITY_HSYNC_LOW;
124 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
125 ctrl_pol |= MDP4_DTV_CTRL_POLARITY_VSYNC_LOW;
126 /* probably need to get DATA_EN polarity from panel.. */
127
128 dtv_hsync_skew = 0; /* get this from panel? */
129
130 hsync_start_x = (mode->htotal - mode->hsync_start);
131 hsync_end_x = mode->htotal - (mode->hsync_start - mode->hdisplay) - 1;
132
133 vsync_period = mode->vtotal * mode->htotal;
134 vsync_len = (mode->vsync_end - mode->vsync_start) * mode->htotal;
135 display_v_start = (mode->vtotal - mode->vsync_start) * mode->htotal + dtv_hsync_skew;
136 display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + dtv_hsync_skew - 1;
137
138 mdp4_write(mdp4_kms, REG_MDP4_DTV_HSYNC_CTRL,
139 MDP4_DTV_HSYNC_CTRL_PULSEW(mode->hsync_end - mode->hsync_start) |
140 MDP4_DTV_HSYNC_CTRL_PERIOD(mode->htotal));
141 mdp4_write(mdp4_kms, REG_MDP4_DTV_VSYNC_PERIOD, vsync_period);
142 mdp4_write(mdp4_kms, REG_MDP4_DTV_VSYNC_LEN, vsync_len);
143 mdp4_write(mdp4_kms, REG_MDP4_DTV_DISPLAY_HCTRL,
144 MDP4_DTV_DISPLAY_HCTRL_START(hsync_start_x) |
145 MDP4_DTV_DISPLAY_HCTRL_END(hsync_end_x));
146 mdp4_write(mdp4_kms, REG_MDP4_DTV_DISPLAY_VSTART, display_v_start);
147 mdp4_write(mdp4_kms, REG_MDP4_DTV_DISPLAY_VEND, display_v_end);
148 mdp4_write(mdp4_kms, REG_MDP4_DTV_BORDER_CLR, 0);
149 mdp4_write(mdp4_kms, REG_MDP4_DTV_UNDERFLOW_CLR,
150 MDP4_DTV_UNDERFLOW_CLR_ENABLE_RECOVERY |
151 MDP4_DTV_UNDERFLOW_CLR_COLOR(0xff));
152 mdp4_write(mdp4_kms, REG_MDP4_DTV_HSYNC_SKEW, dtv_hsync_skew);
153 mdp4_write(mdp4_kms, REG_MDP4_DTV_CTRL_POLARITY, ctrl_pol);
154 mdp4_write(mdp4_kms, REG_MDP4_DTV_ACTIVE_HCTL,
155 MDP4_DTV_ACTIVE_HCTL_START(0) |
156 MDP4_DTV_ACTIVE_HCTL_END(0));
157 mdp4_write(mdp4_kms, REG_MDP4_DTV_ACTIVE_VSTART, 0);
158 mdp4_write(mdp4_kms, REG_MDP4_DTV_ACTIVE_VEND, 0);
159 }
160
mdp4_dtv_encoder_disable(struct drm_encoder * encoder)161 static void mdp4_dtv_encoder_disable(struct drm_encoder *encoder)
162 {
163 struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
164 struct mdp4_kms *mdp4_kms = get_kms(encoder);
165
166 if (WARN_ON(!mdp4_dtv_encoder->enabled))
167 return;
168
169 mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0);
170
171 /*
172 * Wait for a vsync so we know the ENABLE=0 latched before
173 * the (connector) source of the vsync's gets disabled,
174 * otherwise we end up in a funny state if we re-enable
175 * before the disable latches, which results that some of
176 * the settings changes for the new modeset (like new
177 * scanout buffer) don't latch properly..
178 */
179 mdp_irq_wait(&mdp4_kms->base, MDP4_IRQ_EXTERNAL_VSYNC);
180
181 clk_disable_unprepare(mdp4_dtv_encoder->hdmi_clk);
182 clk_disable_unprepare(mdp4_dtv_encoder->mdp_clk);
183
184 bs_set(mdp4_dtv_encoder, 0);
185
186 mdp4_dtv_encoder->enabled = false;
187 }
188
mdp4_dtv_encoder_enable(struct drm_encoder * encoder)189 static void mdp4_dtv_encoder_enable(struct drm_encoder *encoder)
190 {
191 struct drm_device *dev = encoder->dev;
192 struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
193 struct mdp4_kms *mdp4_kms = get_kms(encoder);
194 unsigned long pc = mdp4_dtv_encoder->pixclock;
195 int ret;
196
197 if (WARN_ON(mdp4_dtv_encoder->enabled))
198 return;
199
200 mdp4_crtc_set_config(encoder->crtc,
201 MDP4_DMA_CONFIG_R_BPC(BPC8) |
202 MDP4_DMA_CONFIG_G_BPC(BPC8) |
203 MDP4_DMA_CONFIG_B_BPC(BPC8) |
204 MDP4_DMA_CONFIG_PACK(0x21));
205 mdp4_crtc_set_intf(encoder->crtc, INTF_LCDC_DTV, 1);
206
207 bs_set(mdp4_dtv_encoder, 1);
208
209 DBG("setting mdp_clk=%lu", pc);
210
211 ret = clk_set_rate(mdp4_dtv_encoder->mdp_clk, pc);
212 if (ret)
213 dev_err(dev->dev, "failed to set mdp_clk to %lu: %d\n",
214 pc, ret);
215
216 ret = clk_prepare_enable(mdp4_dtv_encoder->mdp_clk);
217 if (ret)
218 dev_err(dev->dev, "failed to enabled mdp_clk: %d\n", ret);
219
220 ret = clk_prepare_enable(mdp4_dtv_encoder->hdmi_clk);
221 if (ret)
222 dev_err(dev->dev, "failed to enable hdmi_clk: %d\n", ret);
223
224 mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 1);
225
226 mdp4_dtv_encoder->enabled = true;
227 }
228
229 static const struct drm_encoder_helper_funcs mdp4_dtv_encoder_helper_funcs = {
230 .mode_set = mdp4_dtv_encoder_mode_set,
231 .enable = mdp4_dtv_encoder_enable,
232 .disable = mdp4_dtv_encoder_disable,
233 };
234
mdp4_dtv_round_pixclk(struct drm_encoder * encoder,unsigned long rate)235 long mdp4_dtv_round_pixclk(struct drm_encoder *encoder, unsigned long rate)
236 {
237 struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
238 return clk_round_rate(mdp4_dtv_encoder->mdp_clk, rate);
239 }
240
241 /* initialize encoder */
mdp4_dtv_encoder_init(struct drm_device * dev)242 struct drm_encoder *mdp4_dtv_encoder_init(struct drm_device *dev)
243 {
244 struct drm_encoder *encoder = NULL;
245 struct mdp4_dtv_encoder *mdp4_dtv_encoder;
246 int ret;
247
248 mdp4_dtv_encoder = kzalloc(sizeof(*mdp4_dtv_encoder), GFP_KERNEL);
249 if (!mdp4_dtv_encoder) {
250 ret = -ENOMEM;
251 goto fail;
252 }
253
254 encoder = &mdp4_dtv_encoder->base;
255
256 drm_encoder_init(dev, encoder, &mdp4_dtv_encoder_funcs,
257 DRM_MODE_ENCODER_TMDS, NULL);
258 drm_encoder_helper_add(encoder, &mdp4_dtv_encoder_helper_funcs);
259
260 mdp4_dtv_encoder->hdmi_clk = devm_clk_get(dev->dev, "hdmi_clk");
261 if (IS_ERR(mdp4_dtv_encoder->hdmi_clk)) {
262 dev_err(dev->dev, "failed to get hdmi_clk\n");
263 ret = PTR_ERR(mdp4_dtv_encoder->hdmi_clk);
264 goto fail;
265 }
266
267 mdp4_dtv_encoder->mdp_clk = devm_clk_get(dev->dev, "tv_clk");
268 if (IS_ERR(mdp4_dtv_encoder->mdp_clk)) {
269 dev_err(dev->dev, "failed to get tv_clk\n");
270 ret = PTR_ERR(mdp4_dtv_encoder->mdp_clk);
271 goto fail;
272 }
273
274 bs_init(mdp4_dtv_encoder);
275
276 return encoder;
277
278 fail:
279 if (encoder)
280 mdp4_dtv_encoder_destroy(encoder);
281
282 return ERR_PTR(ret);
283 }
284