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1/*
2 * Copyright 2017 Linaro Ltd.
3 * Copyright 2017 ZTE Corporation.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 */
10
11#include <linux/clk.h>
12#include <linux/component.h>
13#include <linux/mfd/syscon.h>
14#include <linux/regmap.h>
15
16#include <drm/drm_atomic_helper.h>
17#include <drm/drm_crtc_helper.h>
18#include <drm/drmP.h>
19
20#include "zx_drm_drv.h"
21#include "zx_tvenc_regs.h"
22#include "zx_vou.h"
23
24struct zx_tvenc_pwrctrl {
25 struct regmap *regmap;
26 u32 reg;
27 u32 mask;
28};
29
30struct zx_tvenc {
31 struct drm_connector connector;
32 struct drm_encoder encoder;
33 struct device *dev;
34 void __iomem *mmio;
35 const struct vou_inf *inf;
36 struct zx_tvenc_pwrctrl pwrctrl;
37};
38
39#define to_zx_tvenc(x) container_of(x, struct zx_tvenc, x)
40
41struct zx_tvenc_mode {
42 struct drm_display_mode mode;
43 u32 video_info;
44 u32 video_res;
45 u32 field1_param;
46 u32 field2_param;
47 u32 burst_line_odd1;
48 u32 burst_line_even1;
49 u32 burst_line_odd2;
50 u32 burst_line_even2;
51 u32 line_timing_param;
52 u32 weight_value;
53 u32 blank_black_level;
54 u32 burst_level;
55 u32 control_param;
56 u32 sub_carrier_phase1;
57 u32 phase_line_incr_cvbs;
58};
59
60/*
61 * The CRM cannot directly provide a suitable frequency, and we have to
62 * ask a multiplied rate from CRM and use the divider in VOU to get the
63 * desired one.
64 */
65#define TVENC_CLOCK_MULTIPLIER 4
66
67static const struct zx_tvenc_mode tvenc_mode_pal = {
68 .mode = {
69 .clock = 13500 * TVENC_CLOCK_MULTIPLIER,
70 .hdisplay = 720,
71 .hsync_start = 720 + 12,
72 .hsync_end = 720 + 12 + 2,
73 .htotal = 720 + 12 + 2 + 130,
74 .vdisplay = 576,
75 .vsync_start = 576 + 2,
76 .vsync_end = 576 + 2 + 2,
77 .vtotal = 576 + 2 + 2 + 20,
78 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC |
79 DRM_MODE_FLAG_INTERLACE,
80 },
81 .video_info = 0x00040040,
82 .video_res = 0x05a9c760,
83 .field1_param = 0x0004d416,
84 .field2_param = 0x0009b94f,
85 .burst_line_odd1 = 0x0004d406,
86 .burst_line_even1 = 0x0009b53e,
87 .burst_line_odd2 = 0x0004d805,
88 .burst_line_even2 = 0x0009b93f,
89 .line_timing_param = 0x06a96fdf,
90 .weight_value = 0x00c188a0,
91 .blank_black_level = 0x0000fcfc,
92 .burst_level = 0x00001595,
93 .control_param = 0x00000001,
94 .sub_carrier_phase1 = 0x1504c566,
95 .phase_line_incr_cvbs = 0xc068db8c,
96};
97
98static const struct zx_tvenc_mode tvenc_mode_ntsc = {
99 .mode = {
100 .clock = 13500 * TVENC_CLOCK_MULTIPLIER,
101 .hdisplay = 720,
102 .hsync_start = 720 + 16,
103 .hsync_end = 720 + 16 + 2,
104 .htotal = 720 + 16 + 2 + 120,
105 .vdisplay = 480,
106 .vsync_start = 480 + 3,
107 .vsync_end = 480 + 3 + 2,
108 .vtotal = 480 + 3 + 2 + 17,
109 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC |
110 DRM_MODE_FLAG_INTERLACE,
111 },
112 .video_info = 0x00040080,
113 .video_res = 0x05a8375a,
114 .field1_param = 0x00041817,
115 .field2_param = 0x0008351e,
116 .burst_line_odd1 = 0x00041006,
117 .burst_line_even1 = 0x0008290d,
118 .burst_line_odd2 = 0x00000000,
119 .burst_line_even2 = 0x00000000,
120 .line_timing_param = 0x06a8ef9e,
121 .weight_value = 0x00b68197,
122 .blank_black_level = 0x0000f0f0,
123 .burst_level = 0x0000009c,
124 .control_param = 0x00000001,
125 .sub_carrier_phase1 = 0x10f83e10,
126 .phase_line_incr_cvbs = 0x80000000,
127};
128
129static const struct zx_tvenc_mode *tvenc_modes[] = {
130 &tvenc_mode_pal,
131 &tvenc_mode_ntsc,
132};
133
134static const struct zx_tvenc_mode *
135zx_tvenc_find_zmode(struct drm_display_mode *mode)
136{
137 int i;
138
139 for (i = 0; i < ARRAY_SIZE(tvenc_modes); i++) {
140 const struct zx_tvenc_mode *zmode = tvenc_modes[i];
141
142 if (drm_mode_equal(mode, &zmode->mode))
143 return zmode;
144 }
145
146 return NULL;
147}
148
149static void zx_tvenc_encoder_mode_set(struct drm_encoder *encoder,
150 struct drm_display_mode *mode,
151 struct drm_display_mode *adj_mode)
152{
153 struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
154 const struct zx_tvenc_mode *zmode;
155 struct vou_div_config configs[] = {
156 { VOU_DIV_INF, VOU_DIV_4 },
157 { VOU_DIV_TVENC, VOU_DIV_1 },
158 { VOU_DIV_LAYER, VOU_DIV_2 },
159 };
160
161 zx_vou_config_dividers(encoder->crtc, configs, ARRAY_SIZE(configs));
162
163 zmode = zx_tvenc_find_zmode(mode);
164 if (!zmode) {
165 DRM_DEV_ERROR(tvenc->dev, "failed to find zmode\n");
166 return;
167 }
168
169 zx_writel(tvenc->mmio + VENC_VIDEO_INFO, zmode->video_info);
170 zx_writel(tvenc->mmio + VENC_VIDEO_RES, zmode->video_res);
171 zx_writel(tvenc->mmio + VENC_FIELD1_PARAM, zmode->field1_param);
172 zx_writel(tvenc->mmio + VENC_FIELD2_PARAM, zmode->field2_param);
173 zx_writel(tvenc->mmio + VENC_LINE_O_1, zmode->burst_line_odd1);
174 zx_writel(tvenc->mmio + VENC_LINE_E_1, zmode->burst_line_even1);
175 zx_writel(tvenc->mmio + VENC_LINE_O_2, zmode->burst_line_odd2);
176 zx_writel(tvenc->mmio + VENC_LINE_E_2, zmode->burst_line_even2);
177 zx_writel(tvenc->mmio + VENC_LINE_TIMING_PARAM,
178 zmode->line_timing_param);
179 zx_writel(tvenc->mmio + VENC_WEIGHT_VALUE, zmode->weight_value);
180 zx_writel(tvenc->mmio + VENC_BLANK_BLACK_LEVEL,
181 zmode->blank_black_level);
182 zx_writel(tvenc->mmio + VENC_BURST_LEVEL, zmode->burst_level);
183 zx_writel(tvenc->mmio + VENC_CONTROL_PARAM, zmode->control_param);
184 zx_writel(tvenc->mmio + VENC_SUB_CARRIER_PHASE1,
185 zmode->sub_carrier_phase1);
186 zx_writel(tvenc->mmio + VENC_PHASE_LINE_INCR_CVBS,
187 zmode->phase_line_incr_cvbs);
188}
189
190static void zx_tvenc_encoder_enable(struct drm_encoder *encoder)
191{
192 struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
193 struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
194
195 /* Set bit to power up TVENC DAC */
196 regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask,
197 pwrctrl->mask);
198
199 vou_inf_enable(VOU_TV_ENC, encoder->crtc);
200
201 zx_writel(tvenc->mmio + VENC_ENABLE, 1);
202}
203
204static void zx_tvenc_encoder_disable(struct drm_encoder *encoder)
205{
206 struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
207 struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
208
209 zx_writel(tvenc->mmio + VENC_ENABLE, 0);
210
211 vou_inf_disable(VOU_TV_ENC, encoder->crtc);
212
213 /* Clear bit to power down TVENC DAC */
214 regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, 0);
215}
216
217static const struct drm_encoder_helper_funcs zx_tvenc_encoder_helper_funcs = {
218 .enable = zx_tvenc_encoder_enable,
219 .disable = zx_tvenc_encoder_disable,
220 .mode_set = zx_tvenc_encoder_mode_set,
221};
222
223static const struct drm_encoder_funcs zx_tvenc_encoder_funcs = {
224 .destroy = drm_encoder_cleanup,
225};
226
227static int zx_tvenc_connector_get_modes(struct drm_connector *connector)
228{
229 struct zx_tvenc *tvenc = to_zx_tvenc(connector);
230 struct device *dev = tvenc->dev;
231 int i;
232
233 for (i = 0; i < ARRAY_SIZE(tvenc_modes); i++) {
234 const struct zx_tvenc_mode *zmode = tvenc_modes[i];
235 struct drm_display_mode *mode;
236
237 mode = drm_mode_duplicate(connector->dev, &zmode->mode);
238 if (!mode) {
239 DRM_DEV_ERROR(dev, "failed to duplicate drm mode\n");
240 continue;
241 }
242
243 drm_mode_set_name(mode);
244 drm_mode_probed_add(connector, mode);
245 }
246
247 return i;
248}
249
250static enum drm_mode_status
251zx_tvenc_connector_mode_valid(struct drm_connector *connector,
252 struct drm_display_mode *mode)
253{
254 struct zx_tvenc *tvenc = to_zx_tvenc(connector);
255 const struct zx_tvenc_mode *zmode;
256
257 zmode = zx_tvenc_find_zmode(mode);
258 if (!zmode) {
259 DRM_DEV_ERROR(tvenc->dev, "unsupported mode: %s\n", mode->name);
260 return MODE_NOMODE;
261 }
262
263 return MODE_OK;
264}
265
266static struct drm_connector_helper_funcs zx_tvenc_connector_helper_funcs = {
267 .get_modes = zx_tvenc_connector_get_modes,
268 .mode_valid = zx_tvenc_connector_mode_valid,
269};
270
271static const struct drm_connector_funcs zx_tvenc_connector_funcs = {
272 .fill_modes = drm_helper_probe_single_connector_modes,
273 .destroy = drm_connector_cleanup,
274 .reset = drm_atomic_helper_connector_reset,
275 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
276 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
277};
278
279static int zx_tvenc_register(struct drm_device *drm, struct zx_tvenc *tvenc)
280{
281 struct drm_encoder *encoder = &tvenc->encoder;
282 struct drm_connector *connector = &tvenc->connector;
283
284 /*
285 * The tvenc is designed to use aux channel, as there is a deflicker
286 * block for the channel.
287 */
288 encoder->possible_crtcs = BIT(1);
289
290 drm_encoder_init(drm, encoder, &zx_tvenc_encoder_funcs,
291 DRM_MODE_ENCODER_TVDAC, NULL);
292 drm_encoder_helper_add(encoder, &zx_tvenc_encoder_helper_funcs);
293
294 connector->interlace_allowed = true;
295
296 drm_connector_init(drm, connector, &zx_tvenc_connector_funcs,
297 DRM_MODE_CONNECTOR_Composite);
298 drm_connector_helper_add(connector, &zx_tvenc_connector_helper_funcs);
299
300 drm_mode_connector_attach_encoder(connector, encoder);
301
302 return 0;
303}
304
305static int zx_tvenc_pwrctrl_init(struct zx_tvenc *tvenc)
306{
307 struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
308 struct device *dev = tvenc->dev;
309 struct of_phandle_args out_args;
310 struct regmap *regmap;
311 int ret;
312
313 ret = of_parse_phandle_with_fixed_args(dev->of_node,
314 "zte,tvenc-power-control", 2, 0, &out_args);
315 if (ret)
316 return ret;
317
318 regmap = syscon_node_to_regmap(out_args.np);
319 if (IS_ERR(regmap)) {
320 ret = PTR_ERR(regmap);
321 goto out;
322 }
323
324 pwrctrl->regmap = regmap;
325 pwrctrl->reg = out_args.args[0];
326 pwrctrl->mask = out_args.args[1];
327
328out:
329 of_node_put(out_args.np);
330 return ret;
331}
332
333static int zx_tvenc_bind(struct device *dev, struct device *master, void *data)
334{
335 struct platform_device *pdev = to_platform_device(dev);
336 struct drm_device *drm = data;
337 struct resource *res;
338 struct zx_tvenc *tvenc;
339 int ret;
340
341 tvenc = devm_kzalloc(dev, sizeof(*tvenc), GFP_KERNEL);
342 if (!tvenc)
343 return -ENOMEM;
344
345 tvenc->dev = dev;
346 dev_set_drvdata(dev, tvenc);
347
348 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
349 tvenc->mmio = devm_ioremap_resource(dev, res);
350 if (IS_ERR(tvenc->mmio)) {
351 ret = PTR_ERR(tvenc->mmio);
352 DRM_DEV_ERROR(dev, "failed to remap tvenc region: %d\n", ret);
353 return ret;
354 }
355
356 ret = zx_tvenc_pwrctrl_init(tvenc);
357 if (ret) {
358 DRM_DEV_ERROR(dev, "failed to init power control: %d\n", ret);
359 return ret;
360 }
361
362 ret = zx_tvenc_register(drm, tvenc);
363 if (ret) {
364 DRM_DEV_ERROR(dev, "failed to register tvenc: %d\n", ret);
365 return ret;
366 }
367
368 return 0;
369}
370
371static void zx_tvenc_unbind(struct device *dev, struct device *master,
372 void *data)
373{
374 /* Nothing to do */
375}
376
377static const struct component_ops zx_tvenc_component_ops = {
378 .bind = zx_tvenc_bind,
379 .unbind = zx_tvenc_unbind,
380};
381
382static int zx_tvenc_probe(struct platform_device *pdev)
383{
384 return component_add(&pdev->dev, &zx_tvenc_component_ops);
385}
386
387static int zx_tvenc_remove(struct platform_device *pdev)
388{
389 component_del(&pdev->dev, &zx_tvenc_component_ops);
390 return 0;
391}
392
393static const struct of_device_id zx_tvenc_of_match[] = {
394 { .compatible = "zte,zx296718-tvenc", },
395 { /* end */ },
396};
397MODULE_DEVICE_TABLE(of, zx_tvenc_of_match);
398
399struct platform_driver zx_tvenc_driver = {
400 .probe = zx_tvenc_probe,
401 .remove = zx_tvenc_remove,
402 .driver = {
403 .name = "zx-tvenc",
404 .of_match_table = zx_tvenc_of_match,
405 },
406};