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