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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2016 Maxime Ripard
4 *
5 * Maxime Ripard <maxime.ripard@free-electrons.com>
6 */
7
8#include <linux/clk.h>
9#include <linux/component.h>
10#include <linux/i2c.h>
11#include <linux/iopoll.h>
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/platform_device.h>
15#include <linux/pm_runtime.h>
16#include <linux/regmap.h>
17#include <linux/reset.h>
18
19#include <drm/drm_atomic.h>
20#include <drm/drm_atomic_helper.h>
21#include <drm/drm_edid.h>
22#include <drm/drm_encoder.h>
23#include <drm/drm_of.h>
24#include <drm/drm_panel.h>
25#include <drm/drm_print.h>
26#include <drm/drm_probe_helper.h>
27#include <drm/drm_simple_kms_helper.h>
28
29#include <drm/display/drm_hdmi_helper.h>
30#include <drm/display/drm_hdmi_state_helper.h>
31
32#include "sun4i_backend.h"
33#include "sun4i_crtc.h"
34#include "sun4i_drv.h"
35#include "sun4i_hdmi.h"
36
37#define drm_encoder_to_sun4i_hdmi(e) \
38 container_of_const(e, struct sun4i_hdmi, encoder)
39
40#define drm_connector_to_sun4i_hdmi(c) \
41 container_of_const(c, struct sun4i_hdmi, connector)
42
43static int sun4i_hdmi_write_infoframe(struct drm_connector *connector,
44 enum hdmi_infoframe_type type,
45 const u8 *buffer, size_t len)
46{
47 struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
48 int i;
49
50 if (type != HDMI_INFOFRAME_TYPE_AVI) {
51 drm_err(connector->dev,
52 "Unsupported infoframe type: %u\n", type);
53 return 0;
54 }
55
56 for (i = 0; i < len; i++)
57 writeb(buffer[i], hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i));
58
59 return 0;
60
61}
62
63static void sun4i_hdmi_disable(struct drm_encoder *encoder,
64 struct drm_atomic_state *state)
65{
66 struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
67 u32 val;
68
69 DRM_DEBUG_DRIVER("Disabling the HDMI Output\n");
70
71 val = readl(hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
72 val &= ~SUN4I_HDMI_VID_CTRL_ENABLE;
73 writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
74
75 clk_disable_unprepare(hdmi->tmds_clk);
76}
77
78static void sun4i_hdmi_enable(struct drm_encoder *encoder,
79 struct drm_atomic_state *state)
80{
81 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
82 struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
83 struct drm_connector *connector = &hdmi->connector;
84 struct drm_display_info *display = &connector->display_info;
85 struct drm_connector_state *conn_state =
86 drm_atomic_get_new_connector_state(state, connector);
87 unsigned long long tmds_rate = conn_state->hdmi.tmds_char_rate;
88 unsigned int x, y;
89 u32 val = 0;
90
91 DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");
92
93 clk_set_rate(hdmi->mod_clk, tmds_rate);
94 clk_set_rate(hdmi->tmds_clk, tmds_rate);
95
96 /* Set input sync enable */
97 writel(SUN4I_HDMI_UNKNOWN_INPUT_SYNC,
98 hdmi->base + SUN4I_HDMI_UNKNOWN_REG);
99
100 /*
101 * Setup output pad (?) controls
102 *
103 * This is done here instead of at probe/bind time because
104 * the controller seems to toggle some of the bits on its own.
105 *
106 * We can't just initialize the register there, we need to
107 * protect the clock bits that have already been read out and
108 * cached by the clock framework.
109 */
110 val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
111 val &= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
112 val |= hdmi->variant->pad_ctrl1_init_val;
113 writel(val, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
114 val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
115
116 /* Setup timing registers */
117 writel(SUN4I_HDMI_VID_TIMING_X(mode->hdisplay) |
118 SUN4I_HDMI_VID_TIMING_Y(mode->vdisplay),
119 hdmi->base + SUN4I_HDMI_VID_TIMING_ACT_REG);
120
121 x = mode->htotal - mode->hsync_start;
122 y = mode->vtotal - mode->vsync_start;
123 writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
124 hdmi->base + SUN4I_HDMI_VID_TIMING_BP_REG);
125
126 x = mode->hsync_start - mode->hdisplay;
127 y = mode->vsync_start - mode->vdisplay;
128 writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
129 hdmi->base + SUN4I_HDMI_VID_TIMING_FP_REG);
130
131 x = mode->hsync_end - mode->hsync_start;
132 y = mode->vsync_end - mode->vsync_start;
133 writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
134 hdmi->base + SUN4I_HDMI_VID_TIMING_SPW_REG);
135
136 val = SUN4I_HDMI_VID_TIMING_POL_TX_CLK;
137 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
138 val |= SUN4I_HDMI_VID_TIMING_POL_HSYNC;
139
140 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
141 val |= SUN4I_HDMI_VID_TIMING_POL_VSYNC;
142
143 writel(val, hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG);
144
145 clk_prepare_enable(hdmi->tmds_clk);
146
147 drm_atomic_helper_connector_hdmi_update_infoframes(connector, state);
148
149 val |= SUN4I_HDMI_PKT_CTRL_TYPE(0, SUN4I_HDMI_PKT_AVI);
150 val |= SUN4I_HDMI_PKT_CTRL_TYPE(1, SUN4I_HDMI_PKT_END);
151 writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));
152
153 val = SUN4I_HDMI_VID_CTRL_ENABLE;
154 if (display->is_hdmi)
155 val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
156
157 writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
158}
159
160static const struct drm_encoder_helper_funcs sun4i_hdmi_helper_funcs = {
161 .atomic_disable = sun4i_hdmi_disable,
162 .atomic_enable = sun4i_hdmi_enable,
163};
164
165static enum drm_mode_status
166sun4i_hdmi_connector_clock_valid(const struct drm_connector *connector,
167 const struct drm_display_mode *mode,
168 unsigned long long clock)
169{
170 const struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
171 unsigned long diff = div_u64(clock, 200); /* +-0.5% allowed by HDMI spec */
172 long rounded_rate;
173
174 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
175 return MODE_BAD;
176
177 /* 165 MHz is the typical max pixelclock frequency for HDMI <= 1.2 */
178 if (clock > 165000000)
179 return MODE_CLOCK_HIGH;
180
181 rounded_rate = clk_round_rate(hdmi->tmds_clk, clock);
182 if (rounded_rate > 0 &&
183 max_t(unsigned long, rounded_rate, clock) -
184 min_t(unsigned long, rounded_rate, clock) < diff)
185 return MODE_OK;
186
187 return MODE_NOCLOCK;
188}
189
190static int sun4i_hdmi_connector_atomic_check(struct drm_connector *connector,
191 struct drm_atomic_state *state)
192{
193 struct drm_connector_state *conn_state =
194 drm_atomic_get_new_connector_state(state, connector);
195 struct drm_crtc *crtc = conn_state->crtc;
196 struct drm_crtc_state *crtc_state = crtc->state;
197 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
198 enum drm_mode_status status;
199
200 status = sun4i_hdmi_connector_clock_valid(connector, mode,
201 conn_state->hdmi.tmds_char_rate);
202 if (status != MODE_OK)
203 return -EINVAL;
204
205 return 0;
206}
207
208static enum drm_mode_status
209sun4i_hdmi_connector_mode_valid(struct drm_connector *connector,
210 struct drm_display_mode *mode)
211{
212 unsigned long long rate = drm_hdmi_compute_mode_clock(mode, 8,
213 HDMI_COLORSPACE_RGB);
214
215 return sun4i_hdmi_connector_clock_valid(connector, mode, rate);
216}
217
218static int sun4i_hdmi_get_modes(struct drm_connector *connector)
219{
220 struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
221 const struct drm_edid *drm_edid;
222 int ret;
223
224 drm_edid = drm_edid_read_ddc(connector, hdmi->ddc_i2c ?: hdmi->i2c);
225
226 drm_edid_connector_update(connector, drm_edid);
227 cec_s_phys_addr(hdmi->cec_adap,
228 connector->display_info.source_physical_address, false);
229
230 if (!drm_edid)
231 return 0;
232
233 DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
234 connector->display_info.is_hdmi ? "an HDMI" : "a DVI");
235
236
237 ret = drm_edid_connector_add_modes(connector);
238 drm_edid_free(drm_edid);
239
240 return ret;
241}
242
243static struct i2c_adapter *sun4i_hdmi_get_ddc(struct device *dev)
244{
245 struct device_node *phandle, *remote;
246 struct i2c_adapter *ddc;
247
248 remote = of_graph_get_remote_node(dev->of_node, 1, -1);
249 if (!remote)
250 return ERR_PTR(-EINVAL);
251
252 phandle = of_parse_phandle(remote, "ddc-i2c-bus", 0);
253 of_node_put(remote);
254 if (!phandle)
255 return ERR_PTR(-ENODEV);
256
257 ddc = of_get_i2c_adapter_by_node(phandle);
258 of_node_put(phandle);
259 if (!ddc)
260 return ERR_PTR(-EPROBE_DEFER);
261
262 return ddc;
263}
264
265static const struct drm_connector_hdmi_funcs sun4i_hdmi_hdmi_connector_funcs = {
266 .tmds_char_rate_valid = sun4i_hdmi_connector_clock_valid,
267 .write_infoframe = sun4i_hdmi_write_infoframe,
268};
269
270static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = {
271 .atomic_check = sun4i_hdmi_connector_atomic_check,
272 .mode_valid = sun4i_hdmi_connector_mode_valid,
273 .get_modes = sun4i_hdmi_get_modes,
274};
275
276static enum drm_connector_status
277sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)
278{
279 struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
280 unsigned long reg;
281
282 reg = readl(hdmi->base + SUN4I_HDMI_HPD_REG);
283 if (!(reg & SUN4I_HDMI_HPD_HIGH)) {
284 cec_phys_addr_invalidate(hdmi->cec_adap);
285 return connector_status_disconnected;
286 }
287
288 return connector_status_connected;
289}
290
291static void sun4i_hdmi_connector_reset(struct drm_connector *connector)
292{
293 drm_atomic_helper_connector_reset(connector);
294 __drm_atomic_helper_connector_hdmi_reset(connector, connector->state);
295}
296
297static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = {
298 .detect = sun4i_hdmi_connector_detect,
299 .fill_modes = drm_helper_probe_single_connector_modes,
300 .reset = sun4i_hdmi_connector_reset,
301 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
302 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
303};
304
305#ifdef CONFIG_DRM_SUN4I_HDMI_CEC
306static int sun4i_hdmi_cec_pin_read(struct cec_adapter *adap)
307{
308 struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
309
310 return readl(hdmi->base + SUN4I_HDMI_CEC) & SUN4I_HDMI_CEC_RX;
311}
312
313static void sun4i_hdmi_cec_pin_low(struct cec_adapter *adap)
314{
315 struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
316
317 /* Start driving the CEC pin low */
318 writel(SUN4I_HDMI_CEC_ENABLE, hdmi->base + SUN4I_HDMI_CEC);
319}
320
321static void sun4i_hdmi_cec_pin_high(struct cec_adapter *adap)
322{
323 struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
324
325 /*
326 * Stop driving the CEC pin, the pull up will take over
327 * unless another CEC device is driving the pin low.
328 */
329 writel(0, hdmi->base + SUN4I_HDMI_CEC);
330}
331
332static const struct cec_pin_ops sun4i_hdmi_cec_pin_ops = {
333 .read = sun4i_hdmi_cec_pin_read,
334 .low = sun4i_hdmi_cec_pin_low,
335 .high = sun4i_hdmi_cec_pin_high,
336};
337#endif
338
339#define SUN4I_HDMI_PAD_CTRL1_MASK (GENMASK(24, 7) | GENMASK(5, 0))
340#define SUN4I_HDMI_PLL_CTRL_MASK (GENMASK(31, 8) | GENMASK(3, 0))
341
342/* Only difference from sun5i is AMP is 4 instead of 6 */
343static const struct sun4i_hdmi_variant sun4i_variant = {
344 .pad_ctrl0_init_val = SUN4I_HDMI_PAD_CTRL0_TXEN |
345 SUN4I_HDMI_PAD_CTRL0_CKEN |
346 SUN4I_HDMI_PAD_CTRL0_PWENG |
347 SUN4I_HDMI_PAD_CTRL0_PWEND |
348 SUN4I_HDMI_PAD_CTRL0_PWENC |
349 SUN4I_HDMI_PAD_CTRL0_LDODEN |
350 SUN4I_HDMI_PAD_CTRL0_LDOCEN |
351 SUN4I_HDMI_PAD_CTRL0_BIASEN,
352 .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(4) |
353 SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
354 SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
355 SUN4I_HDMI_PAD_CTRL1_REG_DEN |
356 SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
357 SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
358 SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
359 SUN4I_HDMI_PAD_CTRL1_AMP_OPT,
360 .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
361 SUN4I_HDMI_PLL_CTRL_CS(7) |
362 SUN4I_HDMI_PLL_CTRL_CP_S(15) |
363 SUN4I_HDMI_PLL_CTRL_S(7) |
364 SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
365 SUN4I_HDMI_PLL_CTRL_SDIV2 |
366 SUN4I_HDMI_PLL_CTRL_LDO2_EN |
367 SUN4I_HDMI_PLL_CTRL_LDO1_EN |
368 SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
369 SUN4I_HDMI_PLL_CTRL_BWS |
370 SUN4I_HDMI_PLL_CTRL_PLL_EN,
371
372 .ddc_clk_reg = REG_FIELD(SUN4I_HDMI_DDC_CLK_REG, 0, 6),
373 .ddc_clk_pre_divider = 2,
374 .ddc_clk_m_offset = 1,
375
376 .field_ddc_en = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 31, 31),
377 .field_ddc_start = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 30, 30),
378 .field_ddc_reset = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 0, 0),
379 .field_ddc_addr_reg = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 31),
380 .field_ddc_slave_addr = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 6),
381 .field_ddc_int_status = REG_FIELD(SUN4I_HDMI_DDC_INT_STATUS_REG, 0, 8),
382 .field_ddc_fifo_clear = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 31, 31),
383 .field_ddc_fifo_rx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
384 .field_ddc_fifo_tx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
385 .field_ddc_byte_count = REG_FIELD(SUN4I_HDMI_DDC_BYTE_COUNT_REG, 0, 9),
386 .field_ddc_cmd = REG_FIELD(SUN4I_HDMI_DDC_CMD_REG, 0, 2),
387 .field_ddc_sda_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 9, 9),
388 .field_ddc_sck_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 8, 8),
389
390 .ddc_fifo_reg = SUN4I_HDMI_DDC_FIFO_DATA_REG,
391 .ddc_fifo_has_dir = true,
392};
393
394static const struct sun4i_hdmi_variant sun5i_variant = {
395 .pad_ctrl0_init_val = SUN4I_HDMI_PAD_CTRL0_TXEN |
396 SUN4I_HDMI_PAD_CTRL0_CKEN |
397 SUN4I_HDMI_PAD_CTRL0_PWENG |
398 SUN4I_HDMI_PAD_CTRL0_PWEND |
399 SUN4I_HDMI_PAD_CTRL0_PWENC |
400 SUN4I_HDMI_PAD_CTRL0_LDODEN |
401 SUN4I_HDMI_PAD_CTRL0_LDOCEN |
402 SUN4I_HDMI_PAD_CTRL0_BIASEN,
403 .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
404 SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
405 SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
406 SUN4I_HDMI_PAD_CTRL1_REG_DEN |
407 SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
408 SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
409 SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
410 SUN4I_HDMI_PAD_CTRL1_AMP_OPT,
411 .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
412 SUN4I_HDMI_PLL_CTRL_CS(7) |
413 SUN4I_HDMI_PLL_CTRL_CP_S(15) |
414 SUN4I_HDMI_PLL_CTRL_S(7) |
415 SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
416 SUN4I_HDMI_PLL_CTRL_SDIV2 |
417 SUN4I_HDMI_PLL_CTRL_LDO2_EN |
418 SUN4I_HDMI_PLL_CTRL_LDO1_EN |
419 SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
420 SUN4I_HDMI_PLL_CTRL_BWS |
421 SUN4I_HDMI_PLL_CTRL_PLL_EN,
422
423 .ddc_clk_reg = REG_FIELD(SUN4I_HDMI_DDC_CLK_REG, 0, 6),
424 .ddc_clk_pre_divider = 2,
425 .ddc_clk_m_offset = 1,
426
427 .field_ddc_en = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 31, 31),
428 .field_ddc_start = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 30, 30),
429 .field_ddc_reset = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 0, 0),
430 .field_ddc_addr_reg = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 31),
431 .field_ddc_slave_addr = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 6),
432 .field_ddc_int_status = REG_FIELD(SUN4I_HDMI_DDC_INT_STATUS_REG, 0, 8),
433 .field_ddc_fifo_clear = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 31, 31),
434 .field_ddc_fifo_rx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
435 .field_ddc_fifo_tx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
436 .field_ddc_byte_count = REG_FIELD(SUN4I_HDMI_DDC_BYTE_COUNT_REG, 0, 9),
437 .field_ddc_cmd = REG_FIELD(SUN4I_HDMI_DDC_CMD_REG, 0, 2),
438 .field_ddc_sda_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 9, 9),
439 .field_ddc_sck_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 8, 8),
440
441 .ddc_fifo_reg = SUN4I_HDMI_DDC_FIFO_DATA_REG,
442 .ddc_fifo_has_dir = true,
443};
444
445static const struct sun4i_hdmi_variant sun6i_variant = {
446 .has_ddc_parent_clk = true,
447 .has_reset_control = true,
448 .pad_ctrl0_init_val = 0xff |
449 SUN4I_HDMI_PAD_CTRL0_TXEN |
450 SUN4I_HDMI_PAD_CTRL0_CKEN |
451 SUN4I_HDMI_PAD_CTRL0_PWENG |
452 SUN4I_HDMI_PAD_CTRL0_PWEND |
453 SUN4I_HDMI_PAD_CTRL0_PWENC |
454 SUN4I_HDMI_PAD_CTRL0_LDODEN |
455 SUN4I_HDMI_PAD_CTRL0_LDOCEN,
456 .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
457 SUN4I_HDMI_PAD_CTRL1_REG_EMP(4) |
458 SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
459 SUN4I_HDMI_PAD_CTRL1_REG_DEN |
460 SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
461 SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
462 SUN4I_HDMI_PAD_CTRL1_PWSDT |
463 SUN4I_HDMI_PAD_CTRL1_PWSCK |
464 SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
465 SUN4I_HDMI_PAD_CTRL1_AMP_OPT |
466 SUN4I_HDMI_PAD_CTRL1_UNKNOWN,
467 .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
468 SUN4I_HDMI_PLL_CTRL_CS(3) |
469 SUN4I_HDMI_PLL_CTRL_CP_S(10) |
470 SUN4I_HDMI_PLL_CTRL_S(4) |
471 SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
472 SUN4I_HDMI_PLL_CTRL_SDIV2 |
473 SUN4I_HDMI_PLL_CTRL_LDO2_EN |
474 SUN4I_HDMI_PLL_CTRL_LDO1_EN |
475 SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
476 SUN4I_HDMI_PLL_CTRL_PLL_EN,
477
478 .ddc_clk_reg = REG_FIELD(SUN6I_HDMI_DDC_CLK_REG, 0, 6),
479 .ddc_clk_pre_divider = 1,
480 .ddc_clk_m_offset = 2,
481
482 .tmds_clk_div_offset = 1,
483
484 .field_ddc_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 0, 0),
485 .field_ddc_start = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 27, 27),
486 .field_ddc_reset = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 31, 31),
487 .field_ddc_addr_reg = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 31),
488 .field_ddc_slave_addr = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 7),
489 .field_ddc_int_status = REG_FIELD(SUN6I_HDMI_DDC_INT_STATUS_REG, 0, 8),
490 .field_ddc_fifo_clear = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 18, 18),
491 .field_ddc_fifo_rx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
492 .field_ddc_fifo_tx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
493 .field_ddc_byte_count = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 16, 25),
494 .field_ddc_cmd = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 0, 2),
495 .field_ddc_sda_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 6, 6),
496 .field_ddc_sck_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 4, 4),
497
498 .ddc_fifo_reg = SUN6I_HDMI_DDC_FIFO_DATA_REG,
499 .ddc_fifo_thres_incl = true,
500};
501
502static const struct regmap_config sun4i_hdmi_regmap_config = {
503 .reg_bits = 32,
504 .val_bits = 32,
505 .reg_stride = 4,
506 .max_register = 0x580,
507};
508
509static int sun4i_hdmi_bind(struct device *dev, struct device *master,
510 void *data)
511{
512 struct platform_device *pdev = to_platform_device(dev);
513 struct drm_device *drm = data;
514 struct cec_connector_info conn_info;
515 struct sun4i_drv *drv = drm->dev_private;
516 struct sun4i_hdmi *hdmi;
517 u32 reg;
518 int ret;
519
520 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
521 if (!hdmi)
522 return -ENOMEM;
523 dev_set_drvdata(dev, hdmi);
524 hdmi->dev = dev;
525 hdmi->drv = drv;
526
527 hdmi->variant = of_device_get_match_data(dev);
528 if (!hdmi->variant)
529 return -EINVAL;
530
531 hdmi->base = devm_platform_ioremap_resource(pdev, 0);
532 if (IS_ERR(hdmi->base)) {
533 dev_err(dev, "Couldn't map the HDMI encoder registers\n");
534 return PTR_ERR(hdmi->base);
535 }
536
537 if (hdmi->variant->has_reset_control) {
538 hdmi->reset = devm_reset_control_get(dev, NULL);
539 if (IS_ERR(hdmi->reset)) {
540 dev_err(dev, "Couldn't get the HDMI reset control\n");
541 return PTR_ERR(hdmi->reset);
542 }
543
544 ret = reset_control_deassert(hdmi->reset);
545 if (ret) {
546 dev_err(dev, "Couldn't deassert HDMI reset\n");
547 return ret;
548 }
549 }
550
551 hdmi->bus_clk = devm_clk_get(dev, "ahb");
552 if (IS_ERR(hdmi->bus_clk)) {
553 dev_err(dev, "Couldn't get the HDMI bus clock\n");
554 ret = PTR_ERR(hdmi->bus_clk);
555 goto err_assert_reset;
556 }
557 clk_prepare_enable(hdmi->bus_clk);
558
559 hdmi->mod_clk = devm_clk_get(dev, "mod");
560 if (IS_ERR(hdmi->mod_clk)) {
561 dev_err(dev, "Couldn't get the HDMI mod clock\n");
562 ret = PTR_ERR(hdmi->mod_clk);
563 goto err_disable_bus_clk;
564 }
565 clk_prepare_enable(hdmi->mod_clk);
566
567 hdmi->pll0_clk = devm_clk_get(dev, "pll-0");
568 if (IS_ERR(hdmi->pll0_clk)) {
569 dev_err(dev, "Couldn't get the HDMI PLL 0 clock\n");
570 ret = PTR_ERR(hdmi->pll0_clk);
571 goto err_disable_mod_clk;
572 }
573
574 hdmi->pll1_clk = devm_clk_get(dev, "pll-1");
575 if (IS_ERR(hdmi->pll1_clk)) {
576 dev_err(dev, "Couldn't get the HDMI PLL 1 clock\n");
577 ret = PTR_ERR(hdmi->pll1_clk);
578 goto err_disable_mod_clk;
579 }
580
581 hdmi->regmap = devm_regmap_init_mmio(dev, hdmi->base,
582 &sun4i_hdmi_regmap_config);
583 if (IS_ERR(hdmi->regmap)) {
584 dev_err(dev, "Couldn't create HDMI encoder regmap\n");
585 ret = PTR_ERR(hdmi->regmap);
586 goto err_disable_mod_clk;
587 }
588
589 ret = sun4i_tmds_create(hdmi);
590 if (ret) {
591 dev_err(dev, "Couldn't create the TMDS clock\n");
592 goto err_disable_mod_clk;
593 }
594
595 if (hdmi->variant->has_ddc_parent_clk) {
596 hdmi->ddc_parent_clk = devm_clk_get(dev, "ddc");
597 if (IS_ERR(hdmi->ddc_parent_clk)) {
598 dev_err(dev, "Couldn't get the HDMI DDC clock\n");
599 ret = PTR_ERR(hdmi->ddc_parent_clk);
600 goto err_disable_mod_clk;
601 }
602 } else {
603 hdmi->ddc_parent_clk = hdmi->tmds_clk;
604 }
605
606 writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG);
607
608 writel(hdmi->variant->pad_ctrl0_init_val,
609 hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG);
610
611 reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
612 reg &= SUN4I_HDMI_PLL_CTRL_DIV_MASK;
613 reg |= hdmi->variant->pll_ctrl_init_val;
614 writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
615
616 ret = sun4i_hdmi_i2c_create(dev, hdmi);
617 if (ret) {
618 dev_err(dev, "Couldn't create the HDMI I2C adapter\n");
619 goto err_disable_mod_clk;
620 }
621
622 hdmi->ddc_i2c = sun4i_hdmi_get_ddc(dev);
623 if (IS_ERR(hdmi->ddc_i2c)) {
624 ret = PTR_ERR(hdmi->ddc_i2c);
625 if (ret == -ENODEV)
626 hdmi->ddc_i2c = NULL;
627 else
628 goto err_del_i2c_adapter;
629 }
630
631 drm_encoder_helper_add(&hdmi->encoder,
632 &sun4i_hdmi_helper_funcs);
633 ret = drm_simple_encoder_init(drm, &hdmi->encoder,
634 DRM_MODE_ENCODER_TMDS);
635 if (ret) {
636 dev_err(dev, "Couldn't initialise the HDMI encoder\n");
637 goto err_put_ddc_i2c;
638 }
639
640 hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,
641 dev->of_node);
642 if (!hdmi->encoder.possible_crtcs) {
643 ret = -EPROBE_DEFER;
644 goto err_put_ddc_i2c;
645 }
646
647#ifdef CONFIG_DRM_SUN4I_HDMI_CEC
648 hdmi->cec_adap = cec_pin_allocate_adapter(&sun4i_hdmi_cec_pin_ops,
649 hdmi, "sun4i", CEC_CAP_DEFAULTS | CEC_CAP_CONNECTOR_INFO);
650 ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);
651 if (ret < 0)
652 goto err_cleanup_connector;
653 writel(readl(hdmi->base + SUN4I_HDMI_CEC) & ~SUN4I_HDMI_CEC_TX,
654 hdmi->base + SUN4I_HDMI_CEC);
655#endif
656
657 drm_connector_helper_add(&hdmi->connector,
658 &sun4i_hdmi_connector_helper_funcs);
659 ret = drmm_connector_hdmi_init(drm, &hdmi->connector,
660 /*
661 * NOTE: Those are likely to be
662 * wrong, but I couldn't find the
663 * actual ones in the BSP.
664 */
665 "AW", "HDMI",
666 &sun4i_hdmi_connector_funcs,
667 &sun4i_hdmi_hdmi_connector_funcs,
668 DRM_MODE_CONNECTOR_HDMIA,
669 hdmi->ddc_i2c,
670 BIT(HDMI_COLORSPACE_RGB),
671 8);
672 if (ret) {
673 dev_err(dev,
674 "Couldn't initialise the HDMI connector\n");
675 goto err_cleanup_connector;
676 }
677 cec_fill_conn_info_from_drm(&conn_info, &hdmi->connector);
678 cec_s_conn_info(hdmi->cec_adap, &conn_info);
679
680 /* There is no HPD interrupt, so we need to poll the controller */
681 hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
682 DRM_CONNECTOR_POLL_DISCONNECT;
683
684 ret = cec_register_adapter(hdmi->cec_adap, dev);
685 if (ret < 0)
686 goto err_cleanup_connector;
687 drm_connector_attach_encoder(&hdmi->connector, &hdmi->encoder);
688
689 return 0;
690
691err_cleanup_connector:
692 cec_delete_adapter(hdmi->cec_adap);
693 drm_encoder_cleanup(&hdmi->encoder);
694err_put_ddc_i2c:
695 i2c_put_adapter(hdmi->ddc_i2c);
696err_del_i2c_adapter:
697 i2c_del_adapter(hdmi->i2c);
698err_disable_mod_clk:
699 clk_disable_unprepare(hdmi->mod_clk);
700err_disable_bus_clk:
701 clk_disable_unprepare(hdmi->bus_clk);
702err_assert_reset:
703 reset_control_assert(hdmi->reset);
704 return ret;
705}
706
707static void sun4i_hdmi_unbind(struct device *dev, struct device *master,
708 void *data)
709{
710 struct sun4i_hdmi *hdmi = dev_get_drvdata(dev);
711
712 cec_unregister_adapter(hdmi->cec_adap);
713 i2c_del_adapter(hdmi->i2c);
714 i2c_put_adapter(hdmi->ddc_i2c);
715 clk_disable_unprepare(hdmi->mod_clk);
716 clk_disable_unprepare(hdmi->bus_clk);
717}
718
719static const struct component_ops sun4i_hdmi_ops = {
720 .bind = sun4i_hdmi_bind,
721 .unbind = sun4i_hdmi_unbind,
722};
723
724static int sun4i_hdmi_probe(struct platform_device *pdev)
725{
726 return component_add(&pdev->dev, &sun4i_hdmi_ops);
727}
728
729static void sun4i_hdmi_remove(struct platform_device *pdev)
730{
731 component_del(&pdev->dev, &sun4i_hdmi_ops);
732}
733
734static const struct of_device_id sun4i_hdmi_of_table[] = {
735 { .compatible = "allwinner,sun4i-a10-hdmi", .data = &sun4i_variant, },
736 { .compatible = "allwinner,sun5i-a10s-hdmi", .data = &sun5i_variant, },
737 { .compatible = "allwinner,sun6i-a31-hdmi", .data = &sun6i_variant, },
738 { }
739};
740MODULE_DEVICE_TABLE(of, sun4i_hdmi_of_table);
741
742static struct platform_driver sun4i_hdmi_driver = {
743 .probe = sun4i_hdmi_probe,
744 .remove = sun4i_hdmi_remove,
745 .driver = {
746 .name = "sun4i-hdmi",
747 .of_match_table = sun4i_hdmi_of_table,
748 },
749};
750module_platform_driver(sun4i_hdmi_driver);
751
752MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
753MODULE_DESCRIPTION("Allwinner A10 HDMI Driver");
754MODULE_LICENSE("GPL");