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 "sun4i_backend.h"
30#include "sun4i_crtc.h"
31#include "sun4i_drv.h"
32#include "sun4i_hdmi.h"
33
34#define drm_encoder_to_sun4i_hdmi(e) \
35 container_of_const(e, struct sun4i_hdmi, encoder)
36
37#define drm_connector_to_sun4i_hdmi(c) \
38 container_of_const(c, struct sun4i_hdmi, connector)
39
40static int sun4i_hdmi_setup_avi_infoframes(struct sun4i_hdmi *hdmi,
41 struct drm_display_mode *mode)
42{
43 struct hdmi_avi_infoframe frame;
44 u8 buffer[17];
45 int i, ret;
46
47 ret = drm_hdmi_avi_infoframe_from_display_mode(frame: &frame,
48 connector: &hdmi->connector, mode);
49 if (ret < 0) {
50 DRM_ERROR("Failed to get infoframes from mode\n");
51 return ret;
52 }
53
54 ret = hdmi_avi_infoframe_pack(frame: &frame, buffer, size: sizeof(buffer));
55 if (ret < 0) {
56 DRM_ERROR("Failed to pack infoframes\n");
57 return ret;
58 }
59
60 for (i = 0; i < sizeof(buffer); i++)
61 writeb(val: buffer[i], addr: hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i));
62
63 return 0;
64}
65
66static void sun4i_hdmi_disable(struct drm_encoder *encoder,
67 struct drm_atomic_state *state)
68{
69 struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
70 u32 val;
71
72 DRM_DEBUG_DRIVER("Disabling the HDMI Output\n");
73
74 val = readl(addr: hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
75 val &= ~SUN4I_HDMI_VID_CTRL_ENABLE;
76 writel(val, addr: hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
77
78 clk_disable_unprepare(clk: hdmi->tmds_clk);
79}
80
81static void sun4i_hdmi_enable(struct drm_encoder *encoder,
82 struct drm_atomic_state *state)
83{
84 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
85 struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
86 struct drm_display_info *display = &hdmi->connector.display_info;
87 unsigned int x, y;
88 u32 val = 0;
89
90 DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");
91
92 clk_set_rate(clk: hdmi->mod_clk, rate: mode->crtc_clock * 1000);
93 clk_set_rate(clk: hdmi->tmds_clk, rate: mode->crtc_clock * 1000);
94
95 /* Set input sync enable */
96 writel(SUN4I_HDMI_UNKNOWN_INPUT_SYNC,
97 addr: hdmi->base + SUN4I_HDMI_UNKNOWN_REG);
98
99 /*
100 * Setup output pad (?) controls
101 *
102 * This is done here instead of at probe/bind time because
103 * the controller seems to toggle some of the bits on its own.
104 *
105 * We can't just initialize the register there, we need to
106 * protect the clock bits that have already been read out and
107 * cached by the clock framework.
108 */
109 val = readl(addr: hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
110 val &= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
111 val |= hdmi->variant->pad_ctrl1_init_val;
112 writel(val, addr: hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
113 val = readl(addr: hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
114
115 /* Setup timing registers */
116 writel(SUN4I_HDMI_VID_TIMING_X(mode->hdisplay) |
117 SUN4I_HDMI_VID_TIMING_Y(mode->vdisplay),
118 addr: hdmi->base + SUN4I_HDMI_VID_TIMING_ACT_REG);
119
120 x = mode->htotal - mode->hsync_start;
121 y = mode->vtotal - mode->vsync_start;
122 writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
123 addr: hdmi->base + SUN4I_HDMI_VID_TIMING_BP_REG);
124
125 x = mode->hsync_start - mode->hdisplay;
126 y = mode->vsync_start - mode->vdisplay;
127 writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
128 addr: hdmi->base + SUN4I_HDMI_VID_TIMING_FP_REG);
129
130 x = mode->hsync_end - mode->hsync_start;
131 y = mode->vsync_end - mode->vsync_start;
132 writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
133 addr: hdmi->base + SUN4I_HDMI_VID_TIMING_SPW_REG);
134
135 val = SUN4I_HDMI_VID_TIMING_POL_TX_CLK;
136 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
137 val |= SUN4I_HDMI_VID_TIMING_POL_HSYNC;
138
139 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
140 val |= SUN4I_HDMI_VID_TIMING_POL_VSYNC;
141
142 writel(val, addr: hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG);
143
144 clk_prepare_enable(clk: hdmi->tmds_clk);
145
146 sun4i_hdmi_setup_avi_infoframes(hdmi, mode);
147 val |= SUN4I_HDMI_PKT_CTRL_TYPE(0, SUN4I_HDMI_PKT_AVI);
148 val |= SUN4I_HDMI_PKT_CTRL_TYPE(1, SUN4I_HDMI_PKT_END);
149 writel(val, addr: hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));
150
151 val = SUN4I_HDMI_VID_CTRL_ENABLE;
152 if (display->is_hdmi)
153 val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
154
155 writel(val, addr: hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
156}
157
158static const struct drm_encoder_helper_funcs sun4i_hdmi_helper_funcs = {
159 .atomic_disable = sun4i_hdmi_disable,
160 .atomic_enable = sun4i_hdmi_enable,
161};
162
163static enum drm_mode_status
164sun4i_hdmi_connector_clock_valid(const struct drm_connector *connector,
165 const struct drm_display_mode *mode,
166 unsigned long long clock)
167{
168 const struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
169 unsigned long diff = div_u64(dividend: clock, divisor: 200); /* +-0.5% allowed by HDMI spec */
170 long rounded_rate;
171
172 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
173 return MODE_BAD;
174
175 /* 165 MHz is the typical max pixelclock frequency for HDMI <= 1.2 */
176 if (clock > 165000000)
177 return MODE_CLOCK_HIGH;
178
179 rounded_rate = clk_round_rate(clk: hdmi->tmds_clk, rate: clock);
180 if (rounded_rate > 0 &&
181 max_t(unsigned long, rounded_rate, clock) -
182 min_t(unsigned long, rounded_rate, clock) < diff)
183 return MODE_OK;
184
185 return MODE_NOCLOCK;
186}
187
188static int sun4i_hdmi_connector_atomic_check(struct drm_connector *connector,
189 struct drm_atomic_state *state)
190{
191 struct drm_connector_state *conn_state =
192 drm_atomic_get_new_connector_state(state, connector);
193 struct drm_crtc *crtc = conn_state->crtc;
194 struct drm_crtc_state *crtc_state = crtc->state;
195 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
196 enum drm_mode_status status;
197
198 status = sun4i_hdmi_connector_clock_valid(connector, mode,
199 clock: mode->clock * 1000);
200 if (status != MODE_OK)
201 return -EINVAL;
202
203 return 0;
204}
205
206static enum drm_mode_status
207sun4i_hdmi_connector_mode_valid(struct drm_connector *connector,
208 struct drm_display_mode *mode)
209{
210 return sun4i_hdmi_connector_clock_valid(connector, mode,
211 clock: mode->clock * 1000);
212}
213
214static int sun4i_hdmi_get_modes(struct drm_connector *connector)
215{
216 struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
217 struct edid *edid;
218 int ret;
219
220 edid = drm_get_edid(connector, adapter: hdmi->ddc_i2c ?: hdmi->i2c);
221 if (!edid)
222 return 0;
223
224 DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
225 connector->display_info.is_hdmi ? "an HDMI" : "a DVI");
226
227 drm_connector_update_edid_property(connector, edid);
228 cec_s_phys_addr_from_edid(adap: hdmi->cec_adap, edid);
229 ret = drm_add_edid_modes(connector, edid);
230 kfree(objp: edid);
231
232 return ret;
233}
234
235static struct i2c_adapter *sun4i_hdmi_get_ddc(struct device *dev)
236{
237 struct device_node *phandle, *remote;
238 struct i2c_adapter *ddc;
239
240 remote = of_graph_get_remote_node(node: dev->of_node, port: 1, endpoint: -1);
241 if (!remote)
242 return ERR_PTR(error: -EINVAL);
243
244 phandle = of_parse_phandle(np: remote, phandle_name: "ddc-i2c-bus", index: 0);
245 of_node_put(node: remote);
246 if (!phandle)
247 return ERR_PTR(error: -ENODEV);
248
249 ddc = of_get_i2c_adapter_by_node(node: phandle);
250 of_node_put(node: phandle);
251 if (!ddc)
252 return ERR_PTR(error: -EPROBE_DEFER);
253
254 return ddc;
255}
256
257static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = {
258 .atomic_check = sun4i_hdmi_connector_atomic_check,
259 .mode_valid = sun4i_hdmi_connector_mode_valid,
260 .get_modes = sun4i_hdmi_get_modes,
261};
262
263static enum drm_connector_status
264sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)
265{
266 struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
267 unsigned long reg;
268
269 reg = readl(addr: hdmi->base + SUN4I_HDMI_HPD_REG);
270 if (!(reg & SUN4I_HDMI_HPD_HIGH)) {
271 cec_phys_addr_invalidate(adap: hdmi->cec_adap);
272 return connector_status_disconnected;
273 }
274
275 return connector_status_connected;
276}
277
278static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = {
279 .detect = sun4i_hdmi_connector_detect,
280 .fill_modes = drm_helper_probe_single_connector_modes,
281 .destroy = drm_connector_cleanup,
282 .reset = drm_atomic_helper_connector_reset,
283 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
284 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
285};
286
287#ifdef CONFIG_DRM_SUN4I_HDMI_CEC
288static int sun4i_hdmi_cec_pin_read(struct cec_adapter *adap)
289{
290 struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
291
292 return readl(addr: hdmi->base + SUN4I_HDMI_CEC) & SUN4I_HDMI_CEC_RX;
293}
294
295static void sun4i_hdmi_cec_pin_low(struct cec_adapter *adap)
296{
297 struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
298
299 /* Start driving the CEC pin low */
300 writel(SUN4I_HDMI_CEC_ENABLE, addr: hdmi->base + SUN4I_HDMI_CEC);
301}
302
303static void sun4i_hdmi_cec_pin_high(struct cec_adapter *adap)
304{
305 struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
306
307 /*
308 * Stop driving the CEC pin, the pull up will take over
309 * unless another CEC device is driving the pin low.
310 */
311 writel(val: 0, addr: hdmi->base + SUN4I_HDMI_CEC);
312}
313
314static const struct cec_pin_ops sun4i_hdmi_cec_pin_ops = {
315 .read = sun4i_hdmi_cec_pin_read,
316 .low = sun4i_hdmi_cec_pin_low,
317 .high = sun4i_hdmi_cec_pin_high,
318};
319#endif
320
321#define SUN4I_HDMI_PAD_CTRL1_MASK (GENMASK(24, 7) | GENMASK(5, 0))
322#define SUN4I_HDMI_PLL_CTRL_MASK (GENMASK(31, 8) | GENMASK(3, 0))
323
324/* Only difference from sun5i is AMP is 4 instead of 6 */
325static const struct sun4i_hdmi_variant sun4i_variant = {
326 .pad_ctrl0_init_val = SUN4I_HDMI_PAD_CTRL0_TXEN |
327 SUN4I_HDMI_PAD_CTRL0_CKEN |
328 SUN4I_HDMI_PAD_CTRL0_PWENG |
329 SUN4I_HDMI_PAD_CTRL0_PWEND |
330 SUN4I_HDMI_PAD_CTRL0_PWENC |
331 SUN4I_HDMI_PAD_CTRL0_LDODEN |
332 SUN4I_HDMI_PAD_CTRL0_LDOCEN |
333 SUN4I_HDMI_PAD_CTRL0_BIASEN,
334 .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(4) |
335 SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
336 SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
337 SUN4I_HDMI_PAD_CTRL1_REG_DEN |
338 SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
339 SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
340 SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
341 SUN4I_HDMI_PAD_CTRL1_AMP_OPT,
342 .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
343 SUN4I_HDMI_PLL_CTRL_CS(7) |
344 SUN4I_HDMI_PLL_CTRL_CP_S(15) |
345 SUN4I_HDMI_PLL_CTRL_S(7) |
346 SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
347 SUN4I_HDMI_PLL_CTRL_SDIV2 |
348 SUN4I_HDMI_PLL_CTRL_LDO2_EN |
349 SUN4I_HDMI_PLL_CTRL_LDO1_EN |
350 SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
351 SUN4I_HDMI_PLL_CTRL_BWS |
352 SUN4I_HDMI_PLL_CTRL_PLL_EN,
353
354 .ddc_clk_reg = REG_FIELD(SUN4I_HDMI_DDC_CLK_REG, 0, 6),
355 .ddc_clk_pre_divider = 2,
356 .ddc_clk_m_offset = 1,
357
358 .field_ddc_en = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 31, 31),
359 .field_ddc_start = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 30, 30),
360 .field_ddc_reset = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 0, 0),
361 .field_ddc_addr_reg = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 31),
362 .field_ddc_slave_addr = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 6),
363 .field_ddc_int_status = REG_FIELD(SUN4I_HDMI_DDC_INT_STATUS_REG, 0, 8),
364 .field_ddc_fifo_clear = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 31, 31),
365 .field_ddc_fifo_rx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
366 .field_ddc_fifo_tx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
367 .field_ddc_byte_count = REG_FIELD(SUN4I_HDMI_DDC_BYTE_COUNT_REG, 0, 9),
368 .field_ddc_cmd = REG_FIELD(SUN4I_HDMI_DDC_CMD_REG, 0, 2),
369 .field_ddc_sda_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 9, 9),
370 .field_ddc_sck_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 8, 8),
371
372 .ddc_fifo_reg = SUN4I_HDMI_DDC_FIFO_DATA_REG,
373 .ddc_fifo_has_dir = true,
374};
375
376static const struct sun4i_hdmi_variant sun5i_variant = {
377 .pad_ctrl0_init_val = SUN4I_HDMI_PAD_CTRL0_TXEN |
378 SUN4I_HDMI_PAD_CTRL0_CKEN |
379 SUN4I_HDMI_PAD_CTRL0_PWENG |
380 SUN4I_HDMI_PAD_CTRL0_PWEND |
381 SUN4I_HDMI_PAD_CTRL0_PWENC |
382 SUN4I_HDMI_PAD_CTRL0_LDODEN |
383 SUN4I_HDMI_PAD_CTRL0_LDOCEN |
384 SUN4I_HDMI_PAD_CTRL0_BIASEN,
385 .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
386 SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
387 SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
388 SUN4I_HDMI_PAD_CTRL1_REG_DEN |
389 SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
390 SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
391 SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
392 SUN4I_HDMI_PAD_CTRL1_AMP_OPT,
393 .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
394 SUN4I_HDMI_PLL_CTRL_CS(7) |
395 SUN4I_HDMI_PLL_CTRL_CP_S(15) |
396 SUN4I_HDMI_PLL_CTRL_S(7) |
397 SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
398 SUN4I_HDMI_PLL_CTRL_SDIV2 |
399 SUN4I_HDMI_PLL_CTRL_LDO2_EN |
400 SUN4I_HDMI_PLL_CTRL_LDO1_EN |
401 SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
402 SUN4I_HDMI_PLL_CTRL_BWS |
403 SUN4I_HDMI_PLL_CTRL_PLL_EN,
404
405 .ddc_clk_reg = REG_FIELD(SUN4I_HDMI_DDC_CLK_REG, 0, 6),
406 .ddc_clk_pre_divider = 2,
407 .ddc_clk_m_offset = 1,
408
409 .field_ddc_en = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 31, 31),
410 .field_ddc_start = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 30, 30),
411 .field_ddc_reset = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 0, 0),
412 .field_ddc_addr_reg = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 31),
413 .field_ddc_slave_addr = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 6),
414 .field_ddc_int_status = REG_FIELD(SUN4I_HDMI_DDC_INT_STATUS_REG, 0, 8),
415 .field_ddc_fifo_clear = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 31, 31),
416 .field_ddc_fifo_rx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
417 .field_ddc_fifo_tx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
418 .field_ddc_byte_count = REG_FIELD(SUN4I_HDMI_DDC_BYTE_COUNT_REG, 0, 9),
419 .field_ddc_cmd = REG_FIELD(SUN4I_HDMI_DDC_CMD_REG, 0, 2),
420 .field_ddc_sda_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 9, 9),
421 .field_ddc_sck_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 8, 8),
422
423 .ddc_fifo_reg = SUN4I_HDMI_DDC_FIFO_DATA_REG,
424 .ddc_fifo_has_dir = true,
425};
426
427static const struct sun4i_hdmi_variant sun6i_variant = {
428 .has_ddc_parent_clk = true,
429 .has_reset_control = true,
430 .pad_ctrl0_init_val = 0xff |
431 SUN4I_HDMI_PAD_CTRL0_TXEN |
432 SUN4I_HDMI_PAD_CTRL0_CKEN |
433 SUN4I_HDMI_PAD_CTRL0_PWENG |
434 SUN4I_HDMI_PAD_CTRL0_PWEND |
435 SUN4I_HDMI_PAD_CTRL0_PWENC |
436 SUN4I_HDMI_PAD_CTRL0_LDODEN |
437 SUN4I_HDMI_PAD_CTRL0_LDOCEN,
438 .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
439 SUN4I_HDMI_PAD_CTRL1_REG_EMP(4) |
440 SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
441 SUN4I_HDMI_PAD_CTRL1_REG_DEN |
442 SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
443 SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
444 SUN4I_HDMI_PAD_CTRL1_PWSDT |
445 SUN4I_HDMI_PAD_CTRL1_PWSCK |
446 SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
447 SUN4I_HDMI_PAD_CTRL1_AMP_OPT |
448 SUN4I_HDMI_PAD_CTRL1_UNKNOWN,
449 .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
450 SUN4I_HDMI_PLL_CTRL_CS(3) |
451 SUN4I_HDMI_PLL_CTRL_CP_S(10) |
452 SUN4I_HDMI_PLL_CTRL_S(4) |
453 SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
454 SUN4I_HDMI_PLL_CTRL_SDIV2 |
455 SUN4I_HDMI_PLL_CTRL_LDO2_EN |
456 SUN4I_HDMI_PLL_CTRL_LDO1_EN |
457 SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
458 SUN4I_HDMI_PLL_CTRL_PLL_EN,
459
460 .ddc_clk_reg = REG_FIELD(SUN6I_HDMI_DDC_CLK_REG, 0, 6),
461 .ddc_clk_pre_divider = 1,
462 .ddc_clk_m_offset = 2,
463
464 .tmds_clk_div_offset = 1,
465
466 .field_ddc_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 0, 0),
467 .field_ddc_start = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 27, 27),
468 .field_ddc_reset = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 31, 31),
469 .field_ddc_addr_reg = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 31),
470 .field_ddc_slave_addr = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 7),
471 .field_ddc_int_status = REG_FIELD(SUN6I_HDMI_DDC_INT_STATUS_REG, 0, 8),
472 .field_ddc_fifo_clear = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 18, 18),
473 .field_ddc_fifo_rx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
474 .field_ddc_fifo_tx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
475 .field_ddc_byte_count = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 16, 25),
476 .field_ddc_cmd = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 0, 2),
477 .field_ddc_sda_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 6, 6),
478 .field_ddc_sck_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 4, 4),
479
480 .ddc_fifo_reg = SUN6I_HDMI_DDC_FIFO_DATA_REG,
481 .ddc_fifo_thres_incl = true,
482};
483
484static const struct regmap_config sun4i_hdmi_regmap_config = {
485 .reg_bits = 32,
486 .val_bits = 32,
487 .reg_stride = 4,
488 .max_register = 0x580,
489};
490
491static int sun4i_hdmi_bind(struct device *dev, struct device *master,
492 void *data)
493{
494 struct platform_device *pdev = to_platform_device(dev);
495 struct drm_device *drm = data;
496 struct cec_connector_info conn_info;
497 struct sun4i_drv *drv = drm->dev_private;
498 struct sun4i_hdmi *hdmi;
499 u32 reg;
500 int ret;
501
502 hdmi = devm_kzalloc(dev, size: sizeof(*hdmi), GFP_KERNEL);
503 if (!hdmi)
504 return -ENOMEM;
505 dev_set_drvdata(dev, data: hdmi);
506 hdmi->dev = dev;
507 hdmi->drv = drv;
508
509 hdmi->variant = of_device_get_match_data(dev);
510 if (!hdmi->variant)
511 return -EINVAL;
512
513 hdmi->base = devm_platform_ioremap_resource(pdev, index: 0);
514 if (IS_ERR(ptr: hdmi->base)) {
515 dev_err(dev, "Couldn't map the HDMI encoder registers\n");
516 return PTR_ERR(ptr: hdmi->base);
517 }
518
519 if (hdmi->variant->has_reset_control) {
520 hdmi->reset = devm_reset_control_get(dev, NULL);
521 if (IS_ERR(ptr: hdmi->reset)) {
522 dev_err(dev, "Couldn't get the HDMI reset control\n");
523 return PTR_ERR(ptr: hdmi->reset);
524 }
525
526 ret = reset_control_deassert(rstc: hdmi->reset);
527 if (ret) {
528 dev_err(dev, "Couldn't deassert HDMI reset\n");
529 return ret;
530 }
531 }
532
533 hdmi->bus_clk = devm_clk_get(dev, id: "ahb");
534 if (IS_ERR(ptr: hdmi->bus_clk)) {
535 dev_err(dev, "Couldn't get the HDMI bus clock\n");
536 ret = PTR_ERR(ptr: hdmi->bus_clk);
537 goto err_assert_reset;
538 }
539 clk_prepare_enable(clk: hdmi->bus_clk);
540
541 hdmi->mod_clk = devm_clk_get(dev, id: "mod");
542 if (IS_ERR(ptr: hdmi->mod_clk)) {
543 dev_err(dev, "Couldn't get the HDMI mod clock\n");
544 ret = PTR_ERR(ptr: hdmi->mod_clk);
545 goto err_disable_bus_clk;
546 }
547 clk_prepare_enable(clk: hdmi->mod_clk);
548
549 hdmi->pll0_clk = devm_clk_get(dev, id: "pll-0");
550 if (IS_ERR(ptr: hdmi->pll0_clk)) {
551 dev_err(dev, "Couldn't get the HDMI PLL 0 clock\n");
552 ret = PTR_ERR(ptr: hdmi->pll0_clk);
553 goto err_disable_mod_clk;
554 }
555
556 hdmi->pll1_clk = devm_clk_get(dev, id: "pll-1");
557 if (IS_ERR(ptr: hdmi->pll1_clk)) {
558 dev_err(dev, "Couldn't get the HDMI PLL 1 clock\n");
559 ret = PTR_ERR(ptr: hdmi->pll1_clk);
560 goto err_disable_mod_clk;
561 }
562
563 hdmi->regmap = devm_regmap_init_mmio(dev, hdmi->base,
564 &sun4i_hdmi_regmap_config);
565 if (IS_ERR(ptr: hdmi->regmap)) {
566 dev_err(dev, "Couldn't create HDMI encoder regmap\n");
567 ret = PTR_ERR(ptr: hdmi->regmap);
568 goto err_disable_mod_clk;
569 }
570
571 ret = sun4i_tmds_create(hdmi);
572 if (ret) {
573 dev_err(dev, "Couldn't create the TMDS clock\n");
574 goto err_disable_mod_clk;
575 }
576
577 if (hdmi->variant->has_ddc_parent_clk) {
578 hdmi->ddc_parent_clk = devm_clk_get(dev, id: "ddc");
579 if (IS_ERR(ptr: hdmi->ddc_parent_clk)) {
580 dev_err(dev, "Couldn't get the HDMI DDC clock\n");
581 ret = PTR_ERR(ptr: hdmi->ddc_parent_clk);
582 goto err_disable_mod_clk;
583 }
584 } else {
585 hdmi->ddc_parent_clk = hdmi->tmds_clk;
586 }
587
588 writel(SUN4I_HDMI_CTRL_ENABLE, addr: hdmi->base + SUN4I_HDMI_CTRL_REG);
589
590 writel(val: hdmi->variant->pad_ctrl0_init_val,
591 addr: hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG);
592
593 reg = readl(addr: hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
594 reg &= SUN4I_HDMI_PLL_CTRL_DIV_MASK;
595 reg |= hdmi->variant->pll_ctrl_init_val;
596 writel(val: reg, addr: hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
597
598 ret = sun4i_hdmi_i2c_create(dev, hdmi);
599 if (ret) {
600 dev_err(dev, "Couldn't create the HDMI I2C adapter\n");
601 goto err_disable_mod_clk;
602 }
603
604 hdmi->ddc_i2c = sun4i_hdmi_get_ddc(dev);
605 if (IS_ERR(ptr: hdmi->ddc_i2c)) {
606 ret = PTR_ERR(ptr: hdmi->ddc_i2c);
607 if (ret == -ENODEV)
608 hdmi->ddc_i2c = NULL;
609 else
610 goto err_del_i2c_adapter;
611 }
612
613 drm_encoder_helper_add(encoder: &hdmi->encoder,
614 funcs: &sun4i_hdmi_helper_funcs);
615 ret = drm_simple_encoder_init(dev: drm, encoder: &hdmi->encoder,
616 DRM_MODE_ENCODER_TMDS);
617 if (ret) {
618 dev_err(dev, "Couldn't initialise the HDMI encoder\n");
619 goto err_put_ddc_i2c;
620 }
621
622 hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(dev: drm,
623 port: dev->of_node);
624 if (!hdmi->encoder.possible_crtcs) {
625 ret = -EPROBE_DEFER;
626 goto err_put_ddc_i2c;
627 }
628
629#ifdef CONFIG_DRM_SUN4I_HDMI_CEC
630 hdmi->cec_adap = cec_pin_allocate_adapter(pin_ops: &sun4i_hdmi_cec_pin_ops,
631 priv: hdmi, name: "sun4i", CEC_CAP_DEFAULTS | CEC_CAP_CONNECTOR_INFO);
632 ret = PTR_ERR_OR_ZERO(ptr: hdmi->cec_adap);
633 if (ret < 0)
634 goto err_cleanup_connector;
635 writel(readl(addr: hdmi->base + SUN4I_HDMI_CEC) & ~SUN4I_HDMI_CEC_TX,
636 addr: hdmi->base + SUN4I_HDMI_CEC);
637#endif
638
639 drm_connector_helper_add(connector: &hdmi->connector,
640 funcs: &sun4i_hdmi_connector_helper_funcs);
641 ret = drm_connector_init_with_ddc(dev: drm, connector: &hdmi->connector,
642 funcs: &sun4i_hdmi_connector_funcs,
643 DRM_MODE_CONNECTOR_HDMIA,
644 ddc: hdmi->ddc_i2c);
645 if (ret) {
646 dev_err(dev,
647 "Couldn't initialise the HDMI connector\n");
648 goto err_cleanup_connector;
649 }
650 cec_fill_conn_info_from_drm(conn_info: &conn_info, connector: &hdmi->connector);
651 cec_s_conn_info(adap: hdmi->cec_adap, conn_info: &conn_info);
652
653 /* There is no HPD interrupt, so we need to poll the controller */
654 hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
655 DRM_CONNECTOR_POLL_DISCONNECT;
656
657 ret = cec_register_adapter(adap: hdmi->cec_adap, parent: dev);
658 if (ret < 0)
659 goto err_cleanup_connector;
660 drm_connector_attach_encoder(connector: &hdmi->connector, encoder: &hdmi->encoder);
661
662 return 0;
663
664err_cleanup_connector:
665 cec_delete_adapter(adap: hdmi->cec_adap);
666 drm_encoder_cleanup(encoder: &hdmi->encoder);
667err_put_ddc_i2c:
668 i2c_put_adapter(adap: hdmi->ddc_i2c);
669err_del_i2c_adapter:
670 i2c_del_adapter(adap: hdmi->i2c);
671err_disable_mod_clk:
672 clk_disable_unprepare(clk: hdmi->mod_clk);
673err_disable_bus_clk:
674 clk_disable_unprepare(clk: hdmi->bus_clk);
675err_assert_reset:
676 reset_control_assert(rstc: hdmi->reset);
677 return ret;
678}
679
680static void sun4i_hdmi_unbind(struct device *dev, struct device *master,
681 void *data)
682{
683 struct sun4i_hdmi *hdmi = dev_get_drvdata(dev);
684
685 cec_unregister_adapter(adap: hdmi->cec_adap);
686 i2c_del_adapter(adap: hdmi->i2c);
687 i2c_put_adapter(adap: hdmi->ddc_i2c);
688 clk_disable_unprepare(clk: hdmi->mod_clk);
689 clk_disable_unprepare(clk: hdmi->bus_clk);
690}
691
692static const struct component_ops sun4i_hdmi_ops = {
693 .bind = sun4i_hdmi_bind,
694 .unbind = sun4i_hdmi_unbind,
695};
696
697static int sun4i_hdmi_probe(struct platform_device *pdev)
698{
699 return component_add(&pdev->dev, &sun4i_hdmi_ops);
700}
701
702static void sun4i_hdmi_remove(struct platform_device *pdev)
703{
704 component_del(&pdev->dev, &sun4i_hdmi_ops);
705}
706
707static const struct of_device_id sun4i_hdmi_of_table[] = {
708 { .compatible = "allwinner,sun4i-a10-hdmi", .data = &sun4i_variant, },
709 { .compatible = "allwinner,sun5i-a10s-hdmi", .data = &sun5i_variant, },
710 { .compatible = "allwinner,sun6i-a31-hdmi", .data = &sun6i_variant, },
711 { }
712};
713MODULE_DEVICE_TABLE(of, sun4i_hdmi_of_table);
714
715static struct platform_driver sun4i_hdmi_driver = {
716 .probe = sun4i_hdmi_probe,
717 .remove_new = sun4i_hdmi_remove,
718 .driver = {
719 .name = "sun4i-hdmi",
720 .of_match_table = sun4i_hdmi_of_table,
721 },
722};
723module_platform_driver(sun4i_hdmi_driver);
724
725MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
726MODULE_DESCRIPTION("Allwinner A10 HDMI Driver");
727MODULE_LICENSE("GPL");
728

source code of linux/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c