1 /*
2 * Copyright (C) 2016 BayLibre, SAS
3 * Author: Neil Armstrong <narmstrong@baylibre.com>
4 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
5 * Copyright (C) 2014 Endless Mobile
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of the
10 * License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
19 *
20 * Written by:
21 * Jasper St. Pierre <jstpierre@mecheye.net>
22 */
23
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/of_graph.h>
27
28 #include <drm/drmP.h>
29 #include <drm/drm_edid.h>
30 #include <drm/drm_crtc_helper.h>
31 #include <drm/drm_atomic_helper.h>
32
33 #include "meson_venc_cvbs.h"
34 #include "meson_venc.h"
35 #include "meson_vclk.h"
36 #include "meson_registers.h"
37
38 /* HHI VDAC Registers */
39 #define HHI_VDAC_CNTL0 0x2F4 /* 0xbd offset in data sheet */
40 #define HHI_VDAC_CNTL1 0x2F8 /* 0xbe offset in data sheet */
41
42 struct meson_venc_cvbs {
43 struct drm_encoder encoder;
44 struct drm_connector connector;
45 struct meson_drm *priv;
46 };
47 #define encoder_to_meson_venc_cvbs(x) \
48 container_of(x, struct meson_venc_cvbs, encoder)
49
50 #define connector_to_meson_venc_cvbs(x) \
51 container_of(x, struct meson_venc_cvbs, connector)
52
53 /* Supported Modes */
54
55 struct meson_cvbs_mode meson_cvbs_modes[MESON_CVBS_MODES_COUNT] = {
56 { /* PAL */
57 .enci = &meson_cvbs_enci_pal,
58 .mode = {
59 DRM_MODE("720x576i", DRM_MODE_TYPE_DRIVER, 13500,
60 720, 732, 795, 864, 0, 576, 580, 586, 625, 0,
61 DRM_MODE_FLAG_INTERLACE),
62 .vrefresh = 50,
63 .picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
64 },
65 },
66 { /* NTSC */
67 .enci = &meson_cvbs_enci_ntsc,
68 .mode = {
69 DRM_MODE("720x480i", DRM_MODE_TYPE_DRIVER, 13500,
70 720, 739, 801, 858, 0, 480, 488, 494, 525, 0,
71 DRM_MODE_FLAG_INTERLACE),
72 .vrefresh = 60,
73 .picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
74 },
75 },
76 };
77
78 static const struct meson_cvbs_mode *
meson_cvbs_get_mode(const struct drm_display_mode * req_mode)79 meson_cvbs_get_mode(const struct drm_display_mode *req_mode)
80 {
81 int i;
82
83 for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
84 struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
85
86 if (drm_mode_match(req_mode, &meson_mode->mode,
87 DRM_MODE_MATCH_TIMINGS |
88 DRM_MODE_MATCH_CLOCK |
89 DRM_MODE_MATCH_FLAGS |
90 DRM_MODE_MATCH_3D_FLAGS))
91 return meson_mode;
92 }
93
94 return NULL;
95 }
96
97 /* Connector */
98
meson_cvbs_connector_destroy(struct drm_connector * connector)99 static void meson_cvbs_connector_destroy(struct drm_connector *connector)
100 {
101 drm_connector_cleanup(connector);
102 }
103
104 static enum drm_connector_status
meson_cvbs_connector_detect(struct drm_connector * connector,bool force)105 meson_cvbs_connector_detect(struct drm_connector *connector, bool force)
106 {
107 /* FIXME: Add load-detect or jack-detect if possible */
108 return connector_status_connected;
109 }
110
meson_cvbs_connector_get_modes(struct drm_connector * connector)111 static int meson_cvbs_connector_get_modes(struct drm_connector *connector)
112 {
113 struct drm_device *dev = connector->dev;
114 struct drm_display_mode *mode;
115 int i;
116
117 for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
118 struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
119
120 mode = drm_mode_duplicate(dev, &meson_mode->mode);
121 if (!mode) {
122 DRM_ERROR("Failed to create a new display mode\n");
123 return 0;
124 }
125
126 drm_mode_probed_add(connector, mode);
127 }
128
129 return i;
130 }
131
meson_cvbs_connector_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)132 static int meson_cvbs_connector_mode_valid(struct drm_connector *connector,
133 struct drm_display_mode *mode)
134 {
135 /* Validate the modes added in get_modes */
136 return MODE_OK;
137 }
138
139 static const struct drm_connector_funcs meson_cvbs_connector_funcs = {
140 .detect = meson_cvbs_connector_detect,
141 .fill_modes = drm_helper_probe_single_connector_modes,
142 .destroy = meson_cvbs_connector_destroy,
143 .reset = drm_atomic_helper_connector_reset,
144 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
145 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
146 };
147
148 static const
149 struct drm_connector_helper_funcs meson_cvbs_connector_helper_funcs = {
150 .get_modes = meson_cvbs_connector_get_modes,
151 .mode_valid = meson_cvbs_connector_mode_valid,
152 };
153
154 /* Encoder */
155
meson_venc_cvbs_encoder_destroy(struct drm_encoder * encoder)156 static void meson_venc_cvbs_encoder_destroy(struct drm_encoder *encoder)
157 {
158 drm_encoder_cleanup(encoder);
159 }
160
161 static const struct drm_encoder_funcs meson_venc_cvbs_encoder_funcs = {
162 .destroy = meson_venc_cvbs_encoder_destroy,
163 };
164
meson_venc_cvbs_encoder_atomic_check(struct drm_encoder * encoder,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state)165 static int meson_venc_cvbs_encoder_atomic_check(struct drm_encoder *encoder,
166 struct drm_crtc_state *crtc_state,
167 struct drm_connector_state *conn_state)
168 {
169 if (meson_cvbs_get_mode(&crtc_state->mode))
170 return 0;
171
172 return -EINVAL;
173 }
174
meson_venc_cvbs_encoder_disable(struct drm_encoder * encoder)175 static void meson_venc_cvbs_encoder_disable(struct drm_encoder *encoder)
176 {
177 struct meson_venc_cvbs *meson_venc_cvbs =
178 encoder_to_meson_venc_cvbs(encoder);
179 struct meson_drm *priv = meson_venc_cvbs->priv;
180
181 /* Disable CVBS VDAC */
182 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0);
183 regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8);
184 }
185
meson_venc_cvbs_encoder_enable(struct drm_encoder * encoder)186 static void meson_venc_cvbs_encoder_enable(struct drm_encoder *encoder)
187 {
188 struct meson_venc_cvbs *meson_venc_cvbs =
189 encoder_to_meson_venc_cvbs(encoder);
190 struct meson_drm *priv = meson_venc_cvbs->priv;
191
192 /* VDAC0 source is not from ATV */
193 writel_bits_relaxed(BIT(5), 0, priv->io_base + _REG(VENC_VDAC_DACSEL0));
194
195 if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
196 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1);
197 else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
198 meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
199 regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001);
200
201 regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
202 }
203
meson_venc_cvbs_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)204 static void meson_venc_cvbs_encoder_mode_set(struct drm_encoder *encoder,
205 struct drm_display_mode *mode,
206 struct drm_display_mode *adjusted_mode)
207 {
208 const struct meson_cvbs_mode *meson_mode = meson_cvbs_get_mode(mode);
209 struct meson_venc_cvbs *meson_venc_cvbs =
210 encoder_to_meson_venc_cvbs(encoder);
211 struct meson_drm *priv = meson_venc_cvbs->priv;
212
213 if (meson_mode) {
214 meson_venci_cvbs_mode_set(priv, meson_mode->enci);
215
216 /* Setup 27MHz vclk2 for ENCI and VDAC */
217 meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS, MESON_VCLK_CVBS,
218 MESON_VCLK_CVBS, MESON_VCLK_CVBS, true);
219 }
220 }
221
222 static const struct drm_encoder_helper_funcs
223 meson_venc_cvbs_encoder_helper_funcs = {
224 .atomic_check = meson_venc_cvbs_encoder_atomic_check,
225 .disable = meson_venc_cvbs_encoder_disable,
226 .enable = meson_venc_cvbs_encoder_enable,
227 .mode_set = meson_venc_cvbs_encoder_mode_set,
228 };
229
meson_venc_cvbs_connector_is_available(struct meson_drm * priv)230 static bool meson_venc_cvbs_connector_is_available(struct meson_drm *priv)
231 {
232 struct device_node *remote;
233
234 remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0);
235 if (!remote)
236 return false;
237
238 of_node_put(remote);
239 return true;
240 }
241
meson_venc_cvbs_create(struct meson_drm * priv)242 int meson_venc_cvbs_create(struct meson_drm *priv)
243 {
244 struct drm_device *drm = priv->drm;
245 struct meson_venc_cvbs *meson_venc_cvbs;
246 struct drm_connector *connector;
247 struct drm_encoder *encoder;
248 int ret;
249
250 if (!meson_venc_cvbs_connector_is_available(priv)) {
251 dev_info(drm->dev, "CVBS Output connector not available\n");
252 return 0;
253 }
254
255 meson_venc_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_venc_cvbs),
256 GFP_KERNEL);
257 if (!meson_venc_cvbs)
258 return -ENOMEM;
259
260 meson_venc_cvbs->priv = priv;
261 encoder = &meson_venc_cvbs->encoder;
262 connector = &meson_venc_cvbs->connector;
263
264 /* Connector */
265
266 drm_connector_helper_add(connector,
267 &meson_cvbs_connector_helper_funcs);
268
269 ret = drm_connector_init(drm, connector, &meson_cvbs_connector_funcs,
270 DRM_MODE_CONNECTOR_Composite);
271 if (ret) {
272 dev_err(priv->dev, "Failed to init CVBS connector\n");
273 return ret;
274 }
275
276 connector->interlace_allowed = 1;
277
278 /* Encoder */
279
280 drm_encoder_helper_add(encoder, &meson_venc_cvbs_encoder_helper_funcs);
281
282 ret = drm_encoder_init(drm, encoder, &meson_venc_cvbs_encoder_funcs,
283 DRM_MODE_ENCODER_TVDAC, "meson_venc_cvbs");
284 if (ret) {
285 dev_err(priv->dev, "Failed to init CVBS encoder\n");
286 return ret;
287 }
288
289 encoder->possible_crtcs = BIT(0);
290
291 drm_connector_attach_encoder(connector, encoder);
292
293 return 0;
294 }
295