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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright 2017 Linaro Ltd.
4 * Copyright 2017 ZTE Corporation.
5 */
6
7#include <linux/clk.h>
8#include <linux/component.h>
9#include <linux/mfd/syscon.h>
10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/regmap.h>
13
14#include <drm/drm_atomic_helper.h>
15#include <drm/drm_print.h>
16#include <drm/drm_probe_helper.h>
17#include <drm/drm_simple_kms_helper.h>
18
19#include "zx_drm_drv.h"
20#include "zx_tvenc_regs.h"
21#include "zx_vou.h"
22
23struct zx_tvenc_pwrctrl {
24 struct regmap *regmap;
25 u32 reg;
26 u32 mask;
27};
28
29struct zx_tvenc {
30 struct drm_connector connector;
31 struct drm_encoder encoder;
32 struct device *dev;
33 void __iomem *mmio;
34 const struct vou_inf *inf;
35 struct zx_tvenc_pwrctrl pwrctrl;
36};
37
38#define to_zx_tvenc(x) container_of(x, struct zx_tvenc, x)
39
40struct zx_tvenc_mode {
41 struct drm_display_mode mode;
42 u32 video_info;
43 u32 video_res;
44 u32 field1_param;
45 u32 field2_param;
46 u32 burst_line_odd1;
47 u32 burst_line_even1;
48 u32 burst_line_odd2;
49 u32 burst_line_even2;
50 u32 line_timing_param;
51 u32 weight_value;
52 u32 blank_black_level;
53 u32 burst_level;
54 u32 control_param;
55 u32 sub_carrier_phase1;
56 u32 phase_line_incr_cvbs;
57};
58
59/*
60 * The CRM cannot directly provide a suitable frequency, and we have to
61 * ask a multiplied rate from CRM and use the divider in VOU to get the
62 * desired one.
63 */
64#define TVENC_CLOCK_MULTIPLIER 4
65
66static const struct zx_tvenc_mode tvenc_mode_pal = {
67 .mode = {
68 .clock = 13500 * TVENC_CLOCK_MULTIPLIER,
69 .hdisplay = 720,
70 .hsync_start = 720 + 12,
71 .hsync_end = 720 + 12 + 2,
72 .htotal = 720 + 12 + 2 + 130,
73 .vdisplay = 576,
74 .vsync_start = 576 + 2,
75 .vsync_end = 576 + 2 + 2,
76 .vtotal = 576 + 2 + 2 + 20,
77 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC |
78 DRM_MODE_FLAG_INTERLACE,
79 },
80 .video_info = 0x00040040,
81 .video_res = 0x05a9c760,
82 .field1_param = 0x0004d416,
83 .field2_param = 0x0009b94f,
84 .burst_line_odd1 = 0x0004d406,
85 .burst_line_even1 = 0x0009b53e,
86 .burst_line_odd2 = 0x0004d805,
87 .burst_line_even2 = 0x0009b93f,
88 .line_timing_param = 0x06a96fdf,
89 .weight_value = 0x00c188a0,
90 .blank_black_level = 0x0000fcfc,
91 .burst_level = 0x00001595,
92 .control_param = 0x00000001,
93 .sub_carrier_phase1 = 0x1504c566,
94 .phase_line_incr_cvbs = 0xc068db8c,
95};
96
97static const struct zx_tvenc_mode tvenc_mode_ntsc = {
98 .mode = {
99 .clock = 13500 * TVENC_CLOCK_MULTIPLIER,
100 .hdisplay = 720,
101 .hsync_start = 720 + 16,
102 .hsync_end = 720 + 16 + 2,
103 .htotal = 720 + 16 + 2 + 120,
104 .vdisplay = 480,
105 .vsync_start = 480 + 3,
106 .vsync_end = 480 + 3 + 2,
107 .vtotal = 480 + 3 + 2 + 17,
108 .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC |
109 DRM_MODE_FLAG_INTERLACE,
110 },
111 .video_info = 0x00040080,
112 .video_res = 0x05a8375a,
113 .field1_param = 0x00041817,
114 .field2_param = 0x0008351e,
115 .burst_line_odd1 = 0x00041006,
116 .burst_line_even1 = 0x0008290d,
117 .burst_line_odd2 = 0x00000000,
118 .burst_line_even2 = 0x00000000,
119 .line_timing_param = 0x06a8ef9e,
120 .weight_value = 0x00b68197,
121 .blank_black_level = 0x0000f0f0,
122 .burst_level = 0x0000009c,
123 .control_param = 0x00000001,
124 .sub_carrier_phase1 = 0x10f83e10,
125 .phase_line_incr_cvbs = 0x80000000,
126};
127
128static const struct zx_tvenc_mode *tvenc_modes[] = {
129 &tvenc_mode_pal,
130 &tvenc_mode_ntsc,
131};
132
133static const struct zx_tvenc_mode *
134zx_tvenc_find_zmode(struct drm_display_mode *mode)
135{
136 int i;
137
138 for (i = 0; i < ARRAY_SIZE(tvenc_modes); i++) {
139 const struct zx_tvenc_mode *zmode = tvenc_modes[i];
140
141 if (drm_mode_equal(mode, &zmode->mode))
142 return zmode;
143 }
144
145 return NULL;
146}
147
148static void zx_tvenc_encoder_mode_set(struct drm_encoder *encoder,
149 struct drm_display_mode *mode,
150 struct drm_display_mode *adj_mode)
151{
152 struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
153 const struct zx_tvenc_mode *zmode;
154 struct vou_div_config configs[] = {
155 { VOU_DIV_INF, VOU_DIV_4 },
156 { VOU_DIV_TVENC, VOU_DIV_1 },
157 { VOU_DIV_LAYER, VOU_DIV_2 },
158 };
159
160 zx_vou_config_dividers(encoder->crtc, configs, ARRAY_SIZE(configs));
161
162 zmode = zx_tvenc_find_zmode(mode);
163 if (!zmode) {
164 DRM_DEV_ERROR(tvenc->dev, "failed to find zmode\n");
165 return;
166 }
167
168 zx_writel(tvenc->mmio + VENC_VIDEO_INFO, zmode->video_info);
169 zx_writel(tvenc->mmio + VENC_VIDEO_RES, zmode->video_res);
170 zx_writel(tvenc->mmio + VENC_FIELD1_PARAM, zmode->field1_param);
171 zx_writel(tvenc->mmio + VENC_FIELD2_PARAM, zmode->field2_param);
172 zx_writel(tvenc->mmio + VENC_LINE_O_1, zmode->burst_line_odd1);
173 zx_writel(tvenc->mmio + VENC_LINE_E_1, zmode->burst_line_even1);
174 zx_writel(tvenc->mmio + VENC_LINE_O_2, zmode->burst_line_odd2);
175 zx_writel(tvenc->mmio + VENC_LINE_E_2, zmode->burst_line_even2);
176 zx_writel(tvenc->mmio + VENC_LINE_TIMING_PARAM,
177 zmode->line_timing_param);
178 zx_writel(tvenc->mmio + VENC_WEIGHT_VALUE, zmode->weight_value);
179 zx_writel(tvenc->mmio + VENC_BLANK_BLACK_LEVEL,
180 zmode->blank_black_level);
181 zx_writel(tvenc->mmio + VENC_BURST_LEVEL, zmode->burst_level);
182 zx_writel(tvenc->mmio + VENC_CONTROL_PARAM, zmode->control_param);
183 zx_writel(tvenc->mmio + VENC_SUB_CARRIER_PHASE1,
184 zmode->sub_carrier_phase1);
185 zx_writel(tvenc->mmio + VENC_PHASE_LINE_INCR_CVBS,
186 zmode->phase_line_incr_cvbs);
187}
188
189static void zx_tvenc_encoder_enable(struct drm_encoder *encoder)
190{
191 struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
192 struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
193
194 /* Set bit to power up TVENC DAC */
195 regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask,
196 pwrctrl->mask);
197
198 vou_inf_enable(VOU_TV_ENC, encoder->crtc);
199
200 zx_writel(tvenc->mmio + VENC_ENABLE, 1);
201}
202
203static void zx_tvenc_encoder_disable(struct drm_encoder *encoder)
204{
205 struct zx_tvenc *tvenc = to_zx_tvenc(encoder);
206 struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
207
208 zx_writel(tvenc->mmio + VENC_ENABLE, 0);
209
210 vou_inf_disable(VOU_TV_ENC, encoder->crtc);
211
212 /* Clear bit to power down TVENC DAC */
213 regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, 0);
214}
215
216static const struct drm_encoder_helper_funcs zx_tvenc_encoder_helper_funcs = {
217 .enable = zx_tvenc_encoder_enable,
218 .disable = zx_tvenc_encoder_disable,
219 .mode_set = zx_tvenc_encoder_mode_set,
220};
221
222static int zx_tvenc_connector_get_modes(struct drm_connector *connector)
223{
224 struct zx_tvenc *tvenc = to_zx_tvenc(connector);
225 struct device *dev = tvenc->dev;
226 int i;
227
228 for (i = 0; i < ARRAY_SIZE(tvenc_modes); i++) {
229 const struct zx_tvenc_mode *zmode = tvenc_modes[i];
230 struct drm_display_mode *mode;
231
232 mode = drm_mode_duplicate(connector->dev, &zmode->mode);
233 if (!mode) {
234 DRM_DEV_ERROR(dev, "failed to duplicate drm mode\n");
235 continue;
236 }
237
238 drm_mode_set_name(mode);
239 drm_mode_probed_add(connector, mode);
240 }
241
242 return i;
243}
244
245static enum drm_mode_status
246zx_tvenc_connector_mode_valid(struct drm_connector *connector,
247 struct drm_display_mode *mode)
248{
249 struct zx_tvenc *tvenc = to_zx_tvenc(connector);
250 const struct zx_tvenc_mode *zmode;
251
252 zmode = zx_tvenc_find_zmode(mode);
253 if (!zmode) {
254 DRM_DEV_ERROR(tvenc->dev, "unsupported mode: %s\n", mode->name);
255 return MODE_NOMODE;
256 }
257
258 return MODE_OK;
259}
260
261static struct drm_connector_helper_funcs zx_tvenc_connector_helper_funcs = {
262 .get_modes = zx_tvenc_connector_get_modes,
263 .mode_valid = zx_tvenc_connector_mode_valid,
264};
265
266static const struct drm_connector_funcs zx_tvenc_connector_funcs = {
267 .fill_modes = drm_helper_probe_single_connector_modes,
268 .destroy = drm_connector_cleanup,
269 .reset = drm_atomic_helper_connector_reset,
270 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
271 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
272};
273
274static int zx_tvenc_register(struct drm_device *drm, struct zx_tvenc *tvenc)
275{
276 struct drm_encoder *encoder = &tvenc->encoder;
277 struct drm_connector *connector = &tvenc->connector;
278
279 /*
280 * The tvenc is designed to use aux channel, as there is a deflicker
281 * block for the channel.
282 */
283 encoder->possible_crtcs = BIT(1);
284
285 drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TVDAC);
286 drm_encoder_helper_add(encoder, &zx_tvenc_encoder_helper_funcs);
287
288 connector->interlace_allowed = true;
289
290 drm_connector_init(drm, connector, &zx_tvenc_connector_funcs,
291 DRM_MODE_CONNECTOR_Composite);
292 drm_connector_helper_add(connector, &zx_tvenc_connector_helper_funcs);
293
294 drm_connector_attach_encoder(connector, encoder);
295
296 return 0;
297}
298
299static int zx_tvenc_pwrctrl_init(struct zx_tvenc *tvenc)
300{
301 struct zx_tvenc_pwrctrl *pwrctrl = &tvenc->pwrctrl;
302 struct device *dev = tvenc->dev;
303 struct of_phandle_args out_args;
304 struct regmap *regmap;
305 int ret;
306
307 ret = of_parse_phandle_with_fixed_args(dev->of_node,
308 "zte,tvenc-power-control", 2, 0, &out_args);
309 if (ret)
310 return ret;
311
312 regmap = syscon_node_to_regmap(out_args.np);
313 if (IS_ERR(regmap)) {
314 ret = PTR_ERR(regmap);
315 goto out;
316 }
317
318 pwrctrl->regmap = regmap;
319 pwrctrl->reg = out_args.args[0];
320 pwrctrl->mask = out_args.args[1];
321
322out:
323 of_node_put(out_args.np);
324 return ret;
325}
326
327static int zx_tvenc_bind(struct device *dev, struct device *master, void *data)
328{
329 struct platform_device *pdev = to_platform_device(dev);
330 struct drm_device *drm = data;
331 struct resource *res;
332 struct zx_tvenc *tvenc;
333 int ret;
334
335 tvenc = devm_kzalloc(dev, sizeof(*tvenc), GFP_KERNEL);
336 if (!tvenc)
337 return -ENOMEM;
338
339 tvenc->dev = dev;
340 dev_set_drvdata(dev, tvenc);
341
342 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
343 tvenc->mmio = devm_ioremap_resource(dev, res);
344 if (IS_ERR(tvenc->mmio)) {
345 ret = PTR_ERR(tvenc->mmio);
346 DRM_DEV_ERROR(dev, "failed to remap tvenc region: %d\n", ret);
347 return ret;
348 }
349
350 ret = zx_tvenc_pwrctrl_init(tvenc);
351 if (ret) {
352 DRM_DEV_ERROR(dev, "failed to init power control: %d\n", ret);
353 return ret;
354 }
355
356 ret = zx_tvenc_register(drm, tvenc);
357 if (ret) {
358 DRM_DEV_ERROR(dev, "failed to register tvenc: %d\n", ret);
359 return ret;
360 }
361
362 return 0;
363}
364
365static void zx_tvenc_unbind(struct device *dev, struct device *master,
366 void *data)
367{
368 /* Nothing to do */
369}
370
371static const struct component_ops zx_tvenc_component_ops = {
372 .bind = zx_tvenc_bind,
373 .unbind = zx_tvenc_unbind,
374};
375
376static int zx_tvenc_probe(struct platform_device *pdev)
377{
378 return component_add(&pdev->dev, &zx_tvenc_component_ops);
379}
380
381static int zx_tvenc_remove(struct platform_device *pdev)
382{
383 component_del(&pdev->dev, &zx_tvenc_component_ops);
384 return 0;
385}
386
387static const struct of_device_id zx_tvenc_of_match[] = {
388 { .compatible = "zte,zx296718-tvenc", },
389 { /* end */ },
390};
391MODULE_DEVICE_TABLE(of, zx_tvenc_of_match);
392
393struct platform_driver zx_tvenc_driver = {
394 .probe = zx_tvenc_probe,
395 .remove = zx_tvenc_remove,
396 .driver = {
397 .name = "zx-tvenc",
398 .of_match_table = zx_tvenc_of_match,
399 },
400};