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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2016 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
6 */
7
8#include <linux/clk.h>
9#include <linux/component.h>
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/of_device.h>
13#include <linux/of_graph.h>
14#include <linux/regulator/consumer.h>
15#include <linux/reset.h>
16
17#include <drm/bridge/dw_hdmi.h>
18#include <drm/drm_atomic_helper.h>
19#include <drm/drm_device.h>
20#include <drm/drm_edid.h>
21#include <drm/drm_probe_helper.h>
22#include <drm/drm_print.h>
23
24#include <linux/media-bus-format.h>
25#include <linux/videodev2.h>
26
27#include "meson_drv.h"
28#include "meson_dw_hdmi.h"
29#include "meson_registers.h"
30#include "meson_vclk.h"
31#include "meson_venc.h"
32
33#define DRIVER_NAME "meson-dw-hdmi"
34#define DRIVER_DESC "Amlogic Meson HDMI-TX DRM driver"
35
36/**
37 * DOC: HDMI Output
38 *
39 * HDMI Output is composed of :
40 *
41 * - A Synopsys DesignWare HDMI Controller IP
42 * - A TOP control block controlling the Clocks and PHY
43 * - A custom HDMI PHY in order convert video to TMDS signal
44 *
45 * .. code::
46 *
47 * ___________________________________
48 * | HDMI TOP |<= HPD
49 * |___________________________________|
50 * | | |
51 * | Synopsys HDMI | HDMI PHY |=> TMDS
52 * | Controller |________________|
53 * |___________________________________|<=> DDC
54 *
55 *
56 * The HDMI TOP block only supports HPD sensing.
57 * The Synopsys HDMI Controller interrupt is routed
58 * through the TOP Block interrupt.
59 * Communication to the TOP Block and the Synopsys
60 * HDMI Controller is done a pair of addr+read/write
61 * registers.
62 * The HDMI PHY is configured by registers in the
63 * HHI register block.
64 *
65 * Pixel data arrives in 4:4:4 format from the VENC
66 * block and the VPU HDMI mux selects either the ENCI
67 * encoder for the 576i or 480i formats or the ENCP
68 * encoder for all the other formats including
69 * interlaced HD formats.
70 * The VENC uses a DVI encoder on top of the ENCI
71 * or ENCP encoders to generate DVI timings for the
72 * HDMI controller.
73 *
74 * GXBB, GXL and GXM embeds the Synopsys DesignWare
75 * HDMI TX IP version 2.01a with HDCP and I2C & S/PDIF
76 * audio source interfaces.
77 *
78 * We handle the following features :
79 *
80 * - HPD Rise & Fall interrupt
81 * - HDMI Controller Interrupt
82 * - HDMI PHY Init for 480i to 1080p60
83 * - VENC & HDMI Clock setup for 480i to 1080p60
84 * - VENC Mode setup for 480i to 1080p60
85 *
86 * What is missing :
87 *
88 * - PHY, Clock and Mode setup for 2k && 4k modes
89 * - SDDC Scrambling mode for HDMI 2.0a
90 * - HDCP Setup
91 * - CEC Management
92 */
93
94/* TOP Block Communication Channel */
95#define HDMITX_TOP_ADDR_REG 0x0
96#define HDMITX_TOP_DATA_REG 0x4
97#define HDMITX_TOP_CTRL_REG 0x8
98#define HDMITX_TOP_G12A_OFFSET 0x8000
99
100/* Controller Communication Channel */
101#define HDMITX_DWC_ADDR_REG 0x10
102#define HDMITX_DWC_DATA_REG 0x14
103#define HDMITX_DWC_CTRL_REG 0x18
104
105/* HHI Registers */
106#define HHI_MEM_PD_REG0 0x100 /* 0x40 */
107#define HHI_HDMI_CLK_CNTL 0x1cc /* 0x73 */
108#define HHI_HDMI_PHY_CNTL0 0x3a0 /* 0xe8 */
109#define HHI_HDMI_PHY_CNTL1 0x3a4 /* 0xe9 */
110#define HHI_HDMI_PHY_CNTL2 0x3a8 /* 0xea */
111#define HHI_HDMI_PHY_CNTL3 0x3ac /* 0xeb */
112#define HHI_HDMI_PHY_CNTL4 0x3b0 /* 0xec */
113#define HHI_HDMI_PHY_CNTL5 0x3b4 /* 0xed */
114
115static DEFINE_SPINLOCK(reg_lock);
116
117enum meson_venc_source {
118 MESON_VENC_SOURCE_NONE = 0,
119 MESON_VENC_SOURCE_ENCI = 1,
120 MESON_VENC_SOURCE_ENCP = 2,
121};
122
123struct meson_dw_hdmi;
124
125struct meson_dw_hdmi_data {
126 unsigned int (*top_read)(struct meson_dw_hdmi *dw_hdmi,
127 unsigned int addr);
128 void (*top_write)(struct meson_dw_hdmi *dw_hdmi,
129 unsigned int addr, unsigned int data);
130 unsigned int (*dwc_read)(struct meson_dw_hdmi *dw_hdmi,
131 unsigned int addr);
132 void (*dwc_write)(struct meson_dw_hdmi *dw_hdmi,
133 unsigned int addr, unsigned int data);
134};
135
136struct meson_dw_hdmi {
137 struct drm_encoder encoder;
138 struct dw_hdmi_plat_data dw_plat_data;
139 struct meson_drm *priv;
140 struct device *dev;
141 void __iomem *hdmitx;
142 const struct meson_dw_hdmi_data *data;
143 struct reset_control *hdmitx_apb;
144 struct reset_control *hdmitx_ctrl;
145 struct reset_control *hdmitx_phy;
146 struct clk *hdmi_pclk;
147 struct clk *venci_clk;
148 struct regulator *hdmi_supply;
149 u32 irq_stat;
150 struct dw_hdmi *hdmi;
151};
152#define encoder_to_meson_dw_hdmi(x) \
153 container_of(x, struct meson_dw_hdmi, encoder)
154
155static inline int dw_hdmi_is_compatible(struct meson_dw_hdmi *dw_hdmi,
156 const char *compat)
157{
158 return of_device_is_compatible(dw_hdmi->dev->of_node, compat);
159}
160
161/* PHY (via TOP bridge) and Controller dedicated register interface */
162
163static unsigned int dw_hdmi_top_read(struct meson_dw_hdmi *dw_hdmi,
164 unsigned int addr)
165{
166 unsigned long flags;
167 unsigned int data;
168
169 spin_lock_irqsave(®_lock, flags);
170
171 /* ADDR must be written twice */
172 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
173 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
174
175 /* Read needs a second DATA read */
176 data = readl(dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
177 data = readl(dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
178
179 spin_unlock_irqrestore(®_lock, flags);
180
181 return data;
182}
183
184static unsigned int dw_hdmi_g12a_top_read(struct meson_dw_hdmi *dw_hdmi,
185 unsigned int addr)
186{
187 return readl(dw_hdmi->hdmitx + HDMITX_TOP_G12A_OFFSET + (addr << 2));
188}
189
190static inline void dw_hdmi_top_write(struct meson_dw_hdmi *dw_hdmi,
191 unsigned int addr, unsigned int data)
192{
193 unsigned long flags;
194
195 spin_lock_irqsave(®_lock, flags);
196
197 /* ADDR must be written twice */
198 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
199 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
200
201 /* Write needs single DATA write */
202 writel(data, dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
203
204 spin_unlock_irqrestore(®_lock, flags);
205}
206
207static inline void dw_hdmi_g12a_top_write(struct meson_dw_hdmi *dw_hdmi,
208 unsigned int addr, unsigned int data)
209{
210 writel(data, dw_hdmi->hdmitx + HDMITX_TOP_G12A_OFFSET + (addr << 2));
211}
212
213/* Helper to change specific bits in PHY registers */
214static inline void dw_hdmi_top_write_bits(struct meson_dw_hdmi *dw_hdmi,
215 unsigned int addr,
216 unsigned int mask,
217 unsigned int val)
218{
219 unsigned int data = dw_hdmi->data->top_read(dw_hdmi, addr);
220
221 data &= ~mask;
222 data |= val;
223
224 dw_hdmi->data->top_write(dw_hdmi, addr, data);
225}
226
227static unsigned int dw_hdmi_dwc_read(struct meson_dw_hdmi *dw_hdmi,
228 unsigned int addr)
229{
230 unsigned long flags;
231 unsigned int data;
232
233 spin_lock_irqsave(®_lock, flags);
234
235 /* ADDR must be written twice */
236 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
237 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
238
239 /* Read needs a second DATA read */
240 data = readl(dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
241 data = readl(dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
242
243 spin_unlock_irqrestore(®_lock, flags);
244
245 return data;
246}
247
248static unsigned int dw_hdmi_g12a_dwc_read(struct meson_dw_hdmi *dw_hdmi,
249 unsigned int addr)
250{
251 return readb(dw_hdmi->hdmitx + addr);
252}
253
254static inline void dw_hdmi_dwc_write(struct meson_dw_hdmi *dw_hdmi,
255 unsigned int addr, unsigned int data)
256{
257 unsigned long flags;
258
259 spin_lock_irqsave(®_lock, flags);
260
261 /* ADDR must be written twice */
262 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
263 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
264
265 /* Write needs single DATA write */
266 writel(data, dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
267
268 spin_unlock_irqrestore(®_lock, flags);
269}
270
271static inline void dw_hdmi_g12a_dwc_write(struct meson_dw_hdmi *dw_hdmi,
272 unsigned int addr, unsigned int data)
273{
274 writeb(data, dw_hdmi->hdmitx + addr);
275}
276
277/* Helper to change specific bits in controller registers */
278static inline void dw_hdmi_dwc_write_bits(struct meson_dw_hdmi *dw_hdmi,
279 unsigned int addr,
280 unsigned int mask,
281 unsigned int val)
282{
283 unsigned int data = dw_hdmi->data->dwc_read(dw_hdmi, addr);
284
285 data &= ~mask;
286 data |= val;
287
288 dw_hdmi->data->dwc_write(dw_hdmi, addr, data);
289}
290
291/* Bridge */
292
293/* Setup PHY bandwidth modes */
294static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
295 struct drm_display_mode *mode)
296{
297 struct meson_drm *priv = dw_hdmi->priv;
298 unsigned int pixel_clock = mode->clock;
299
300 if (dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
301 dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxm-dw-hdmi")) {
302 if (pixel_clock >= 371250) {
303 /* 5.94Gbps, 3.7125Gbps */
304 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x333d3282);
305 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2136315b);
306 } else if (pixel_clock >= 297000) {
307 /* 2.97Gbps */
308 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33303382);
309 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2036315b);
310 } else if (pixel_clock >= 148500) {
311 /* 1.485Gbps */
312 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33303362);
313 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2016315b);
314 } else {
315 /* 742.5Mbps, and below */
316 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33604142);
317 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x0016315b);
318 }
319 } else if (dw_hdmi_is_compatible(dw_hdmi,
320 "amlogic,meson-gxbb-dw-hdmi")) {
321 if (pixel_clock >= 371250) {
322 /* 5.94Gbps, 3.7125Gbps */
323 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33353245);
324 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2100115b);
325 } else if (pixel_clock >= 297000) {
326 /* 2.97Gbps */
327 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33634283);
328 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0xb000115b);
329 } else {
330 /* 1.485Gbps, and below */
331 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33632122);
332 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2000115b);
333 }
334 } else if (dw_hdmi_is_compatible(dw_hdmi,
335 "amlogic,meson-g12a-dw-hdmi")) {
336 if (pixel_clock >= 371250) {
337 /* 5.94Gbps, 3.7125Gbps */
338 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x37eb65c4);
339 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b);
340 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x0000080b);
341 } else if (pixel_clock >= 297000) {
342 /* 2.97Gbps */
343 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33eb6262);
344 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b);
345 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x00000003);
346 } else {
347 /* 1.485Gbps, and below */
348 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33eb4242);
349 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b);
350 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x00000003);
351 }
352 }
353}
354
355static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
356{
357 struct meson_drm *priv = dw_hdmi->priv;
358
359 /* Enable and software reset */
360 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0xf);
361
362 mdelay(2);
363
364 /* Enable and unreset */
365 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0xe);
366
367 mdelay(2);
368}
369
370static void dw_hdmi_set_vclk(struct meson_dw_hdmi *dw_hdmi,
371 struct drm_display_mode *mode)
372{
373 struct meson_drm *priv = dw_hdmi->priv;
374 int vic = drm_match_cea_mode(mode);
375 unsigned int vclk_freq;
376 unsigned int venc_freq;
377 unsigned int hdmi_freq;
378
379 vclk_freq = mode->clock;
380
381 if (!vic) {
382 meson_vclk_setup(priv, MESON_VCLK_TARGET_DMT, vclk_freq,
383 vclk_freq, vclk_freq, false);
384 return;
385 }
386
387 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
388 vclk_freq *= 2;
389
390 venc_freq = vclk_freq;
391 hdmi_freq = vclk_freq;
392
393 if (meson_venc_hdmi_venc_repeat(vic))
394 venc_freq *= 2;
395
396 vclk_freq = max(venc_freq, hdmi_freq);
397
398 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
399 venc_freq /= 2;
400
401 DRM_DEBUG_DRIVER("vclk:%d venc=%d hdmi=%d enci=%d\n",
402 vclk_freq, venc_freq, hdmi_freq,
403 priv->venc.hdmi_use_enci);
404
405 meson_vclk_setup(priv, MESON_VCLK_TARGET_HDMI, vclk_freq,
406 venc_freq, hdmi_freq, priv->venc.hdmi_use_enci);
407}
408
409static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
410 struct drm_display_mode *mode)
411{
412 struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
413 struct meson_drm *priv = dw_hdmi->priv;
414 unsigned int wr_clk =
415 readl_relaxed(priv->io_base + _REG(VPU_HDMI_SETTING));
416
417 DRM_DEBUG_DRIVER("\"%s\" div%d\n", mode->name,
418 mode->clock > 340000 ? 40 : 10);
419
420 /* Enable clocks */
421 regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, 0xffff, 0x100);
422
423 /* Bring HDMITX MEM output of power down */
424 regmap_update_bits(priv->hhi, HHI_MEM_PD_REG0, 0xff << 8, 0);
425
426 /* Bring out of reset */
427 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_SW_RESET, 0);
428
429 /* Enable internal pixclk, tmds_clk, spdif_clk, i2s_clk, cecclk */
430 dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL,
431 0x3, 0x3);
432
433 /* Enable cec_clk and hdcp22_tmdsclk_en */
434 dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL,
435 0x3 << 4, 0x3 << 4);
436
437 /* Enable normal output to PHY */
438 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_BIST_CNTL, BIT(12));
439
440 /* TMDS pattern setup (TOFIX Handle the YUV420 case) */
441 if (mode->clock > 340000) {
442 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01,
443 0);
444 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23,
445 0x03ff03ff);
446 } else {
447 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01,
448 0x001f001f);
449 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23,
450 0x001f001f);
451 }
452
453 /* Load TMDS pattern */
454 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x1);
455 msleep(20);
456 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x2);
457
458 /* Setup PHY parameters */
459 meson_hdmi_phy_setup_mode(dw_hdmi, mode);
460
461 /* Setup PHY */
462 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
463 0xffff << 16, 0x0390 << 16);
464
465 /* BIT_INVERT */
466 if (dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
467 dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxm-dw-hdmi") ||
468 dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-g12a-dw-hdmi"))
469 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
470 BIT(17), 0);
471 else
472 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
473 BIT(17), BIT(17));
474
475 /* Disable clock, fifo, fifo_wr */
476 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0);
477
478 dw_hdmi_set_high_tmds_clock_ratio(hdmi);
479
480 msleep(100);
481
482 /* Reset PHY 3 times in a row */
483 meson_dw_hdmi_phy_reset(dw_hdmi);
484 meson_dw_hdmi_phy_reset(dw_hdmi);
485 meson_dw_hdmi_phy_reset(dw_hdmi);
486
487 /* Temporary Disable VENC video stream */
488 if (priv->venc.hdmi_use_enci)
489 writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
490 else
491 writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
492
493 /* Temporary Disable HDMI video stream to HDMI-TX */
494 writel_bits_relaxed(0x3, 0,
495 priv->io_base + _REG(VPU_HDMI_SETTING));
496 writel_bits_relaxed(0xf << 8, 0,
497 priv->io_base + _REG(VPU_HDMI_SETTING));
498
499 /* Re-Enable VENC video stream */
500 if (priv->venc.hdmi_use_enci)
501 writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
502 else
503 writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
504
505 /* Push back HDMI clock settings */
506 writel_bits_relaxed(0xf << 8, wr_clk & (0xf << 8),
507 priv->io_base + _REG(VPU_HDMI_SETTING));
508
509 /* Enable and Select HDMI video source for HDMI-TX */
510 if (priv->venc.hdmi_use_enci)
511 writel_bits_relaxed(0x3, MESON_VENC_SOURCE_ENCI,
512 priv->io_base + _REG(VPU_HDMI_SETTING));
513 else
514 writel_bits_relaxed(0x3, MESON_VENC_SOURCE_ENCP,
515 priv->io_base + _REG(VPU_HDMI_SETTING));
516
517 return 0;
518}
519
520static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi,
521 void *data)
522{
523 struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
524 struct meson_drm *priv = dw_hdmi->priv;
525
526 DRM_DEBUG_DRIVER("\n");
527
528 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0);
529}
530
531static enum drm_connector_status dw_hdmi_read_hpd(struct dw_hdmi *hdmi,
532 void *data)
533{
534 struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
535
536 return !!dw_hdmi->data->top_read(dw_hdmi, HDMITX_TOP_STAT0) ?
537 connector_status_connected : connector_status_disconnected;
538}
539
540static void dw_hdmi_setup_hpd(struct dw_hdmi *hdmi,
541 void *data)
542{
543 struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
544
545 /* Setup HPD Filter */
546 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_HPD_FILTER,
547 (0xa << 12) | 0xa0);
548
549 /* Clear interrupts */
550 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR,
551 HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL);
552
553 /* Unmask interrupts */
554 dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_INTR_MASKN,
555 HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL,
556 HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL);
557}
558
559static const struct dw_hdmi_phy_ops meson_dw_hdmi_phy_ops = {
560 .init = dw_hdmi_phy_init,
561 .disable = dw_hdmi_phy_disable,
562 .read_hpd = dw_hdmi_read_hpd,
563 .setup_hpd = dw_hdmi_setup_hpd,
564};
565
566static irqreturn_t dw_hdmi_top_irq(int irq, void *dev_id)
567{
568 struct meson_dw_hdmi *dw_hdmi = dev_id;
569 u32 stat;
570
571 stat = dw_hdmi->data->top_read(dw_hdmi, HDMITX_TOP_INTR_STAT);
572 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, stat);
573
574 /* HPD Events, handle in the threaded interrupt handler */
575 if (stat & (HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL)) {
576 dw_hdmi->irq_stat = stat;
577 return IRQ_WAKE_THREAD;
578 }
579
580 /* HDMI Controller Interrupt */
581 if (stat & 1)
582 return IRQ_NONE;
583
584 /* TOFIX Handle HDCP Interrupts */
585
586 return IRQ_HANDLED;
587}
588
589/* Threaded interrupt handler to manage HPD events */
590static irqreturn_t dw_hdmi_top_thread_irq(int irq, void *dev_id)
591{
592 struct meson_dw_hdmi *dw_hdmi = dev_id;
593 u32 stat = dw_hdmi->irq_stat;
594
595 /* HPD Events */
596 if (stat & (HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL)) {
597 bool hpd_connected = false;
598
599 if (stat & HDMITX_TOP_INTR_HPD_RISE)
600 hpd_connected = true;
601
602 dw_hdmi_setup_rx_sense(dw_hdmi->hdmi, hpd_connected,
603 hpd_connected);
604
605 drm_helper_hpd_irq_event(dw_hdmi->encoder.dev);
606 }
607
608 return IRQ_HANDLED;
609}
610
611static enum drm_mode_status
612dw_hdmi_mode_valid(struct drm_connector *connector,
613 const struct drm_display_mode *mode)
614{
615 struct meson_drm *priv = connector->dev->dev_private;
616 unsigned int vclk_freq;
617 unsigned int venc_freq;
618 unsigned int hdmi_freq;
619 int vic = drm_match_cea_mode(mode);
620 enum drm_mode_status status;
621
622 DRM_DEBUG_DRIVER("Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
623
624 /* If sink max TMDS clock, we reject the mode */
625 if (connector->display_info.max_tmds_clock &&
626 mode->clock > connector->display_info.max_tmds_clock)
627 return MODE_BAD;
628
629 /* Check against non-VIC supported modes */
630 if (!vic) {
631 status = meson_venc_hdmi_supported_mode(mode);
632 if (status != MODE_OK)
633 return status;
634
635 return meson_vclk_dmt_supported_freq(priv, mode->clock);
636 /* Check against supported VIC modes */
637 } else if (!meson_venc_hdmi_supported_vic(vic))
638 return MODE_BAD;
639
640 vclk_freq = mode->clock;
641
642 /* 480i/576i needs global pixel doubling */
643 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
644 vclk_freq *= 2;
645
646 venc_freq = vclk_freq;
647 hdmi_freq = vclk_freq;
648
649 /* VENC double pixels for 1080i and 720p modes */
650 if (meson_venc_hdmi_venc_repeat(vic))
651 venc_freq *= 2;
652
653 vclk_freq = max(venc_freq, hdmi_freq);
654
655 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
656 venc_freq /= 2;
657
658 dev_dbg(connector->dev->dev, "%s: vclk:%d venc=%d hdmi=%d\n", __func__,
659 vclk_freq, venc_freq, hdmi_freq);
660
661 return meson_vclk_vic_supported_freq(vclk_freq);
662}
663
664/* Encoder */
665
666static void meson_venc_hdmi_encoder_destroy(struct drm_encoder *encoder)
667{
668 drm_encoder_cleanup(encoder);
669}
670
671static const struct drm_encoder_funcs meson_venc_hdmi_encoder_funcs = {
672 .destroy = meson_venc_hdmi_encoder_destroy,
673};
674
675static int meson_venc_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
676 struct drm_crtc_state *crtc_state,
677 struct drm_connector_state *conn_state)
678{
679 return 0;
680}
681
682static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
683{
684 struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
685 struct meson_drm *priv = dw_hdmi->priv;
686
687 DRM_DEBUG_DRIVER("\n");
688
689 writel_bits_relaxed(0x3, 0,
690 priv->io_base + _REG(VPU_HDMI_SETTING));
691
692 writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
693 writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
694}
695
696static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
697{
698 struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
699 struct meson_drm *priv = dw_hdmi->priv;
700
701 DRM_DEBUG_DRIVER("%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
702
703 if (priv->venc.hdmi_use_enci)
704 writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
705 else
706 writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
707}
708
709static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
710 struct drm_display_mode *mode,
711 struct drm_display_mode *adjusted_mode)
712{
713 struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
714 struct meson_drm *priv = dw_hdmi->priv;
715 int vic = drm_match_cea_mode(mode);
716
717 DRM_DEBUG_DRIVER("\"%s\" vic %d\n", mode->name, vic);
718
719 /* VENC + VENC-DVI Mode setup */
720 meson_venc_hdmi_mode_set(priv, vic, mode);
721
722 /* VCLK Set clock */
723 dw_hdmi_set_vclk(dw_hdmi, mode);
724
725 /* Setup YUV444 to HDMI-TX, no 10bit diphering */
726 writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
727}
728
729static const struct drm_encoder_helper_funcs
730 meson_venc_hdmi_encoder_helper_funcs = {
731 .atomic_check = meson_venc_hdmi_encoder_atomic_check,
732 .disable = meson_venc_hdmi_encoder_disable,
733 .enable = meson_venc_hdmi_encoder_enable,
734 .mode_set = meson_venc_hdmi_encoder_mode_set,
735};
736
737/* DW HDMI Regmap */
738
739static int meson_dw_hdmi_reg_read(void *context, unsigned int reg,
740 unsigned int *result)
741{
742 struct meson_dw_hdmi *dw_hdmi = context;
743
744 *result = dw_hdmi->data->dwc_read(dw_hdmi, reg);
745
746 return 0;
747
748}
749
750static int meson_dw_hdmi_reg_write(void *context, unsigned int reg,
751 unsigned int val)
752{
753 struct meson_dw_hdmi *dw_hdmi = context;
754
755 dw_hdmi->data->dwc_write(dw_hdmi, reg, val);
756
757 return 0;
758}
759
760static const struct regmap_config meson_dw_hdmi_regmap_config = {
761 .reg_bits = 32,
762 .val_bits = 8,
763 .reg_read = meson_dw_hdmi_reg_read,
764 .reg_write = meson_dw_hdmi_reg_write,
765 .max_register = 0x10000,
766 .fast_io = true,
767};
768
769static const struct meson_dw_hdmi_data meson_dw_hdmi_gx_data = {
770 .top_read = dw_hdmi_top_read,
771 .top_write = dw_hdmi_top_write,
772 .dwc_read = dw_hdmi_dwc_read,
773 .dwc_write = dw_hdmi_dwc_write,
774};
775
776static const struct meson_dw_hdmi_data meson_dw_hdmi_g12a_data = {
777 .top_read = dw_hdmi_g12a_top_read,
778 .top_write = dw_hdmi_g12a_top_write,
779 .dwc_read = dw_hdmi_g12a_dwc_read,
780 .dwc_write = dw_hdmi_g12a_dwc_write,
781};
782
783static bool meson_hdmi_connector_is_available(struct device *dev)
784{
785 struct device_node *ep, *remote;
786
787 /* HDMI Connector is on the second port, first endpoint */
788 ep = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
789 if (!ep)
790 return false;
791
792 /* If the endpoint node exists, consider it enabled */
793 remote = of_graph_get_remote_port(ep);
794 if (remote) {
795 of_node_put(ep);
796 return true;
797 }
798
799 of_node_put(ep);
800 of_node_put(remote);
801
802 return false;
803}
804
805static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
806 void *data)
807{
808 struct platform_device *pdev = to_platform_device(dev);
809 const struct meson_dw_hdmi_data *match;
810 struct meson_dw_hdmi *meson_dw_hdmi;
811 struct drm_device *drm = data;
812 struct meson_drm *priv = drm->dev_private;
813 struct dw_hdmi_plat_data *dw_plat_data;
814 struct drm_encoder *encoder;
815 struct resource *res;
816 int irq;
817 int ret;
818
819 DRM_DEBUG_DRIVER("\n");
820
821 if (!meson_hdmi_connector_is_available(dev)) {
822 dev_info(drm->dev, "HDMI Output connector not available\n");
823 return -ENODEV;
824 }
825
826 match = of_device_get_match_data(&pdev->dev);
827 if (!match) {
828 dev_err(&pdev->dev, "failed to get match data\n");
829 return -ENODEV;
830 }
831
832 meson_dw_hdmi = devm_kzalloc(dev, sizeof(*meson_dw_hdmi),
833 GFP_KERNEL);
834 if (!meson_dw_hdmi)
835 return -ENOMEM;
836
837 meson_dw_hdmi->priv = priv;
838 meson_dw_hdmi->dev = dev;
839 meson_dw_hdmi->data = match;
840 dw_plat_data = &meson_dw_hdmi->dw_plat_data;
841 encoder = &meson_dw_hdmi->encoder;
842
843 meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
844 if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
845 if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER)
846 return -EPROBE_DEFER;
847 meson_dw_hdmi->hdmi_supply = NULL;
848 } else {
849 ret = regulator_enable(meson_dw_hdmi->hdmi_supply);
850 if (ret)
851 return ret;
852 }
853
854 meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev,
855 "hdmitx_apb");
856 if (IS_ERR(meson_dw_hdmi->hdmitx_apb)) {
857 dev_err(dev, "Failed to get hdmitx_apb reset\n");
858 return PTR_ERR(meson_dw_hdmi->hdmitx_apb);
859 }
860
861 meson_dw_hdmi->hdmitx_ctrl = devm_reset_control_get_exclusive(dev,
862 "hdmitx");
863 if (IS_ERR(meson_dw_hdmi->hdmitx_ctrl)) {
864 dev_err(dev, "Failed to get hdmitx reset\n");
865 return PTR_ERR(meson_dw_hdmi->hdmitx_ctrl);
866 }
867
868 meson_dw_hdmi->hdmitx_phy = devm_reset_control_get_exclusive(dev,
869 "hdmitx_phy");
870 if (IS_ERR(meson_dw_hdmi->hdmitx_phy)) {
871 dev_err(dev, "Failed to get hdmitx_phy reset\n");
872 return PTR_ERR(meson_dw_hdmi->hdmitx_phy);
873 }
874
875 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
876 meson_dw_hdmi->hdmitx = devm_ioremap_resource(dev, res);
877 if (IS_ERR(meson_dw_hdmi->hdmitx))
878 return PTR_ERR(meson_dw_hdmi->hdmitx);
879
880 meson_dw_hdmi->hdmi_pclk = devm_clk_get(dev, "isfr");
881 if (IS_ERR(meson_dw_hdmi->hdmi_pclk)) {
882 dev_err(dev, "Unable to get HDMI pclk\n");
883 return PTR_ERR(meson_dw_hdmi->hdmi_pclk);
884 }
885 clk_prepare_enable(meson_dw_hdmi->hdmi_pclk);
886
887 meson_dw_hdmi->venci_clk = devm_clk_get(dev, "venci");
888 if (IS_ERR(meson_dw_hdmi->venci_clk)) {
889 dev_err(dev, "Unable to get venci clk\n");
890 return PTR_ERR(meson_dw_hdmi->venci_clk);
891 }
892 clk_prepare_enable(meson_dw_hdmi->venci_clk);
893
894 dw_plat_data->regm = devm_regmap_init(dev, NULL, meson_dw_hdmi,
895 &meson_dw_hdmi_regmap_config);
896 if (IS_ERR(dw_plat_data->regm))
897 return PTR_ERR(dw_plat_data->regm);
898
899 irq = platform_get_irq(pdev, 0);
900 if (irq < 0) {
901 dev_err(dev, "Failed to get hdmi top irq\n");
902 return irq;
903 }
904
905 ret = devm_request_threaded_irq(dev, irq, dw_hdmi_top_irq,
906 dw_hdmi_top_thread_irq, IRQF_SHARED,
907 "dw_hdmi_top_irq", meson_dw_hdmi);
908 if (ret) {
909 dev_err(dev, "Failed to request hdmi top irq\n");
910 return ret;
911 }
912
913 /* Encoder */
914
915 drm_encoder_helper_add(encoder, &meson_venc_hdmi_encoder_helper_funcs);
916
917 ret = drm_encoder_init(drm, encoder, &meson_venc_hdmi_encoder_funcs,
918 DRM_MODE_ENCODER_TMDS, "meson_hdmi");
919 if (ret) {
920 dev_err(priv->dev, "Failed to init HDMI encoder\n");
921 return ret;
922 }
923
924 encoder->possible_crtcs = BIT(0);
925
926 DRM_DEBUG_DRIVER("encoder initialized\n");
927
928 /* Enable clocks */
929 regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, 0xffff, 0x100);
930
931 /* Bring HDMITX MEM output of power down */
932 regmap_update_bits(priv->hhi, HHI_MEM_PD_REG0, 0xff << 8, 0);
933
934 /* Reset HDMITX APB & TX & PHY */
935 reset_control_reset(meson_dw_hdmi->hdmitx_apb);
936 reset_control_reset(meson_dw_hdmi->hdmitx_ctrl);
937 reset_control_reset(meson_dw_hdmi->hdmitx_phy);
938
939 /* Enable APB3 fail on error */
940 if (!meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
941 writel_bits_relaxed(BIT(15), BIT(15),
942 meson_dw_hdmi->hdmitx + HDMITX_TOP_CTRL_REG);
943 writel_bits_relaxed(BIT(15), BIT(15),
944 meson_dw_hdmi->hdmitx + HDMITX_DWC_CTRL_REG);
945 }
946
947 /* Bring out of reset */
948 meson_dw_hdmi->data->top_write(meson_dw_hdmi,
949 HDMITX_TOP_SW_RESET, 0);
950
951 msleep(20);
952
953 meson_dw_hdmi->data->top_write(meson_dw_hdmi,
954 HDMITX_TOP_CLK_CNTL, 0xff);
955
956 /* Enable HDMI-TX Interrupt */
957 meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_INTR_STAT_CLR,
958 HDMITX_TOP_INTR_CORE);
959
960 meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_INTR_MASKN,
961 HDMITX_TOP_INTR_CORE);
962
963 /* Bridge / Connector */
964
965 dw_plat_data->mode_valid = dw_hdmi_mode_valid;
966 dw_plat_data->phy_ops = &meson_dw_hdmi_phy_ops;
967 dw_plat_data->phy_name = "meson_dw_hdmi_phy";
968 dw_plat_data->phy_data = meson_dw_hdmi;
969 dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
970 dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
971
972 platform_set_drvdata(pdev, meson_dw_hdmi);
973
974 meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
975 &meson_dw_hdmi->dw_plat_data);
976 if (IS_ERR(meson_dw_hdmi->hdmi))
977 return PTR_ERR(meson_dw_hdmi->hdmi);
978
979 DRM_DEBUG_DRIVER("HDMI controller initialized\n");
980
981 return 0;
982}
983
984static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
985 void *data)
986{
987 struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
988
989 dw_hdmi_unbind(meson_dw_hdmi->hdmi);
990}
991
992static const struct component_ops meson_dw_hdmi_ops = {
993 .bind = meson_dw_hdmi_bind,
994 .unbind = meson_dw_hdmi_unbind,
995};
996
997static int meson_dw_hdmi_probe(struct platform_device *pdev)
998{
999 return component_add(&pdev->dev, &meson_dw_hdmi_ops);
1000}
1001
1002static int meson_dw_hdmi_remove(struct platform_device *pdev)
1003{
1004 component_del(&pdev->dev, &meson_dw_hdmi_ops);
1005
1006 return 0;
1007}
1008
1009static const struct of_device_id meson_dw_hdmi_of_table[] = {
1010 { .compatible = "amlogic,meson-gxbb-dw-hdmi",
1011 .data = &meson_dw_hdmi_gx_data },
1012 { .compatible = "amlogic,meson-gxl-dw-hdmi",
1013 .data = &meson_dw_hdmi_gx_data },
1014 { .compatible = "amlogic,meson-gxm-dw-hdmi",
1015 .data = &meson_dw_hdmi_gx_data },
1016 { .compatible = "amlogic,meson-g12a-dw-hdmi",
1017 .data = &meson_dw_hdmi_g12a_data },
1018 { }
1019};
1020MODULE_DEVICE_TABLE(of, meson_dw_hdmi_of_table);
1021
1022static struct platform_driver meson_dw_hdmi_platform_driver = {
1023 .probe = meson_dw_hdmi_probe,
1024 .remove = meson_dw_hdmi_remove,
1025 .driver = {
1026 .name = DRIVER_NAME,
1027 .of_match_table = meson_dw_hdmi_of_table,
1028 },
1029};
1030module_platform_driver(meson_dw_hdmi_platform_driver);
1031
1032MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
1033MODULE_DESCRIPTION(DRIVER_DESC);
1034MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (C) 2016 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
6 */
7
8#include <linux/clk.h>
9#include <linux/component.h>
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/of_graph.h>
14#include <linux/platform_device.h>
15#include <linux/regulator/consumer.h>
16#include <linux/reset.h>
17
18#include <drm/bridge/dw_hdmi.h>
19#include <drm/drm_atomic_helper.h>
20#include <drm/drm_bridge.h>
21#include <drm/drm_device.h>
22#include <drm/drm_edid.h>
23#include <drm/drm_probe_helper.h>
24#include <drm/drm_print.h>
25
26#include <linux/videodev2.h>
27
28#include "meson_drv.h"
29#include "meson_dw_hdmi.h"
30#include "meson_registers.h"
31
32#define DRIVER_NAME "meson-dw-hdmi"
33#define DRIVER_DESC "Amlogic Meson HDMI-TX DRM driver"
34
35/**
36 * DOC: HDMI Output
37 *
38 * HDMI Output is composed of :
39 *
40 * - A Synopsys DesignWare HDMI Controller IP
41 * - A TOP control block controlling the Clocks and PHY
42 * - A custom HDMI PHY in order convert video to TMDS signal
43 *
44 * .. code::
45 *
46 * ___________________________________
47 * | HDMI TOP |<= HPD
48 * |___________________________________|
49 * | | |
50 * | Synopsys HDMI | HDMI PHY |=> TMDS
51 * | Controller |________________|
52 * |___________________________________|<=> DDC
53 *
54 *
55 * The HDMI TOP block only supports HPD sensing.
56 * The Synopsys HDMI Controller interrupt is routed
57 * through the TOP Block interrupt.
58 * Communication to the TOP Block and the Synopsys
59 * HDMI Controller is done a pair of addr+read/write
60 * registers.
61 * The HDMI PHY is configured by registers in the
62 * HHI register block.
63 *
64 * Pixel data arrives in 4:4:4 format from the VENC
65 * block and the VPU HDMI mux selects either the ENCI
66 * encoder for the 576i or 480i formats or the ENCP
67 * encoder for all the other formats including
68 * interlaced HD formats.
69 * The VENC uses a DVI encoder on top of the ENCI
70 * or ENCP encoders to generate DVI timings for the
71 * HDMI controller.
72 *
73 * GXBB, GXL and GXM embeds the Synopsys DesignWare
74 * HDMI TX IP version 2.01a with HDCP and I2C & S/PDIF
75 * audio source interfaces.
76 *
77 * We handle the following features :
78 *
79 * - HPD Rise & Fall interrupt
80 * - HDMI Controller Interrupt
81 * - HDMI PHY Init for 480i to 1080p60
82 * - VENC & HDMI Clock setup for 480i to 1080p60
83 * - VENC Mode setup for 480i to 1080p60
84 *
85 * What is missing :
86 *
87 * - PHY, Clock and Mode setup for 2k && 4k modes
88 * - SDDC Scrambling mode for HDMI 2.0a
89 * - HDCP Setup
90 * - CEC Management
91 */
92
93/* TOP Block Communication Channel */
94#define HDMITX_TOP_ADDR_REG 0x0
95#define HDMITX_TOP_DATA_REG 0x4
96#define HDMITX_TOP_CTRL_REG 0x8
97#define HDMITX_TOP_G12A_OFFSET 0x8000
98
99/* Controller Communication Channel */
100#define HDMITX_DWC_ADDR_REG 0x10
101#define HDMITX_DWC_DATA_REG 0x14
102#define HDMITX_DWC_CTRL_REG 0x18
103
104/* HHI Registers */
105#define HHI_MEM_PD_REG0 0x100 /* 0x40 */
106#define HHI_HDMI_CLK_CNTL 0x1cc /* 0x73 */
107#define HHI_HDMI_PHY_CNTL0 0x3a0 /* 0xe8 */
108#define HHI_HDMI_PHY_CNTL1 0x3a4 /* 0xe9 */
109#define PHY_CNTL1_INIT 0x03900000
110#define PHY_INVERT BIT(17)
111#define HHI_HDMI_PHY_CNTL2 0x3a8 /* 0xea */
112#define HHI_HDMI_PHY_CNTL3 0x3ac /* 0xeb */
113#define HHI_HDMI_PHY_CNTL4 0x3b0 /* 0xec */
114#define HHI_HDMI_PHY_CNTL5 0x3b4 /* 0xed */
115
116static DEFINE_SPINLOCK(reg_lock);
117
118enum meson_venc_source {
119 MESON_VENC_SOURCE_NONE = 0,
120 MESON_VENC_SOURCE_ENCI = 1,
121 MESON_VENC_SOURCE_ENCP = 2,
122};
123
124struct meson_dw_hdmi;
125
126struct meson_dw_hdmi_data {
127 unsigned int (*top_read)(struct meson_dw_hdmi *dw_hdmi,
128 unsigned int addr);
129 void (*top_write)(struct meson_dw_hdmi *dw_hdmi,
130 unsigned int addr, unsigned int data);
131 unsigned int (*dwc_read)(struct meson_dw_hdmi *dw_hdmi,
132 unsigned int addr);
133 void (*dwc_write)(struct meson_dw_hdmi *dw_hdmi,
134 unsigned int addr, unsigned int data);
135 u32 cntl0_init;
136 u32 cntl1_init;
137};
138
139struct meson_dw_hdmi {
140 struct dw_hdmi_plat_data dw_plat_data;
141 struct meson_drm *priv;
142 struct device *dev;
143 void __iomem *hdmitx;
144 const struct meson_dw_hdmi_data *data;
145 struct reset_control *hdmitx_apb;
146 struct reset_control *hdmitx_ctrl;
147 struct reset_control *hdmitx_phy;
148 u32 irq_stat;
149 struct dw_hdmi *hdmi;
150 struct drm_bridge *bridge;
151};
152
153static inline int dw_hdmi_is_compatible(struct meson_dw_hdmi *dw_hdmi,
154 const char *compat)
155{
156 return of_device_is_compatible(dw_hdmi->dev->of_node, compat);
157}
158
159/* PHY (via TOP bridge) and Controller dedicated register interface */
160
161static unsigned int dw_hdmi_top_read(struct meson_dw_hdmi *dw_hdmi,
162 unsigned int addr)
163{
164 unsigned long flags;
165 unsigned int data;
166
167 spin_lock_irqsave(®_lock, flags);
168
169 /* ADDR must be written twice */
170 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
171 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
172
173 /* Read needs a second DATA read */
174 data = readl(dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
175 data = readl(dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
176
177 spin_unlock_irqrestore(®_lock, flags);
178
179 return data;
180}
181
182static unsigned int dw_hdmi_g12a_top_read(struct meson_dw_hdmi *dw_hdmi,
183 unsigned int addr)
184{
185 return readl(dw_hdmi->hdmitx + HDMITX_TOP_G12A_OFFSET + (addr << 2));
186}
187
188static inline void dw_hdmi_top_write(struct meson_dw_hdmi *dw_hdmi,
189 unsigned int addr, unsigned int data)
190{
191 unsigned long flags;
192
193 spin_lock_irqsave(®_lock, flags);
194
195 /* ADDR must be written twice */
196 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
197 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
198
199 /* Write needs single DATA write */
200 writel(data, dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
201
202 spin_unlock_irqrestore(®_lock, flags);
203}
204
205static inline void dw_hdmi_g12a_top_write(struct meson_dw_hdmi *dw_hdmi,
206 unsigned int addr, unsigned int data)
207{
208 writel(data, dw_hdmi->hdmitx + HDMITX_TOP_G12A_OFFSET + (addr << 2));
209}
210
211/* Helper to change specific bits in PHY registers */
212static inline void dw_hdmi_top_write_bits(struct meson_dw_hdmi *dw_hdmi,
213 unsigned int addr,
214 unsigned int mask,
215 unsigned int val)
216{
217 unsigned int data = dw_hdmi->data->top_read(dw_hdmi, addr);
218
219 data &= ~mask;
220 data |= val;
221
222 dw_hdmi->data->top_write(dw_hdmi, addr, data);
223}
224
225static unsigned int dw_hdmi_dwc_read(struct meson_dw_hdmi *dw_hdmi,
226 unsigned int addr)
227{
228 unsigned long flags;
229 unsigned int data;
230
231 spin_lock_irqsave(®_lock, flags);
232
233 /* ADDR must be written twice */
234 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
235 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
236
237 /* Read needs a second DATA read */
238 data = readl(dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
239 data = readl(dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
240
241 spin_unlock_irqrestore(®_lock, flags);
242
243 return data;
244}
245
246static unsigned int dw_hdmi_g12a_dwc_read(struct meson_dw_hdmi *dw_hdmi,
247 unsigned int addr)
248{
249 return readb(dw_hdmi->hdmitx + addr);
250}
251
252static inline void dw_hdmi_dwc_write(struct meson_dw_hdmi *dw_hdmi,
253 unsigned int addr, unsigned int data)
254{
255 unsigned long flags;
256
257 spin_lock_irqsave(®_lock, flags);
258
259 /* ADDR must be written twice */
260 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
261 writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
262
263 /* Write needs single DATA write */
264 writel(data, dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
265
266 spin_unlock_irqrestore(®_lock, flags);
267}
268
269static inline void dw_hdmi_g12a_dwc_write(struct meson_dw_hdmi *dw_hdmi,
270 unsigned int addr, unsigned int data)
271{
272 writeb(data, dw_hdmi->hdmitx + addr);
273}
274
275/* Bridge */
276
277/* Setup PHY bandwidth modes */
278static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
279 const struct drm_display_mode *mode,
280 bool mode_is_420)
281{
282 struct meson_drm *priv = dw_hdmi->priv;
283 unsigned int pixel_clock = mode->clock;
284
285 /* For 420, pixel clock is half unlike venc clock */
286 if (mode_is_420) pixel_clock /= 2;
287
288 if (dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
289 dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxm-dw-hdmi")) {
290 if (pixel_clock >= 371250) {
291 /* 5.94Gbps, 3.7125Gbps */
292 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x333d3282);
293 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2136315b);
294 } else if (pixel_clock >= 297000) {
295 /* 2.97Gbps */
296 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33303382);
297 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2036315b);
298 } else if (pixel_clock >= 148500) {
299 /* 1.485Gbps */
300 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33303362);
301 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2016315b);
302 } else {
303 /* 742.5Mbps, and below */
304 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33604142);
305 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x0016315b);
306 }
307 } else if (dw_hdmi_is_compatible(dw_hdmi,
308 "amlogic,meson-gxbb-dw-hdmi")) {
309 if (pixel_clock >= 371250) {
310 /* 5.94Gbps, 3.7125Gbps */
311 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33353245);
312 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2100115b);
313 } else if (pixel_clock >= 297000) {
314 /* 2.97Gbps */
315 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33634283);
316 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0xb000115b);
317 } else {
318 /* 1.485Gbps, and below */
319 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33632122);
320 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2000115b);
321 }
322 } else if (dw_hdmi_is_compatible(dw_hdmi,
323 "amlogic,meson-g12a-dw-hdmi")) {
324 if (pixel_clock >= 371250) {
325 /* 5.94Gbps, 3.7125Gbps */
326 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x37eb65c4);
327 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b);
328 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x0000080b);
329 } else if (pixel_clock >= 297000) {
330 /* 2.97Gbps */
331 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33eb6262);
332 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b);
333 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x00000003);
334 } else {
335 /* 1.485Gbps, and below */
336 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33eb4242);
337 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2ab0ff3b);
338 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL5, 0x00000003);
339 }
340 }
341}
342
343static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
344{
345 struct meson_drm *priv = dw_hdmi->priv;
346
347 /* Enable and software reset */
348 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0xf);
349
350 mdelay(2);
351
352 /* Enable and unreset */
353 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0xe);
354
355 mdelay(2);
356}
357
358static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
359 const struct drm_display_info *display,
360 const struct drm_display_mode *mode)
361{
362 struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
363 bool is_hdmi2_sink = display->hdmi.scdc.supported;
364 struct meson_drm *priv = dw_hdmi->priv;
365 unsigned int wr_clk =
366 readl_relaxed(priv->io_base + _REG(VPU_HDMI_SETTING));
367 bool mode_is_420 = false;
368
369 DRM_DEBUG_DRIVER("\"%s\" div%d\n", mode->name,
370 mode->clock > 340000 ? 40 : 10);
371
372 if (drm_mode_is_420_only(display, mode) ||
373 (!is_hdmi2_sink && drm_mode_is_420_also(display, mode)) ||
374 dw_hdmi_bus_fmt_is_420(hdmi))
375 mode_is_420 = true;
376
377 /* TMDS pattern setup */
378 if (mode->clock > 340000 && !mode_is_420) {
379 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01,
380 0);
381 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23,
382 0x03ff03ff);
383 } else {
384 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01,
385 0x001f001f);
386 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23,
387 0x001f001f);
388 }
389
390 /* Load TMDS pattern */
391 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x1);
392 msleep(20);
393 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x2);
394
395 /* Setup PHY parameters */
396 meson_hdmi_phy_setup_mode(dw_hdmi, mode, mode_is_420);
397
398 /* Disable clock, fifo, fifo_wr */
399 regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0);
400
401 dw_hdmi_set_high_tmds_clock_ratio(hdmi, display);
402
403 msleep(100);
404
405 /* Reset PHY 3 times in a row */
406 meson_dw_hdmi_phy_reset(dw_hdmi);
407 meson_dw_hdmi_phy_reset(dw_hdmi);
408 meson_dw_hdmi_phy_reset(dw_hdmi);
409
410 /* Temporary Disable VENC video stream */
411 if (priv->venc.hdmi_use_enci)
412 writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
413 else
414 writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
415
416 /* Temporary Disable HDMI video stream to HDMI-TX */
417 writel_bits_relaxed(0x3, 0,
418 priv->io_base + _REG(VPU_HDMI_SETTING));
419 writel_bits_relaxed(0xf << 8, 0,
420 priv->io_base + _REG(VPU_HDMI_SETTING));
421
422 /* Re-Enable VENC video stream */
423 if (priv->venc.hdmi_use_enci)
424 writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
425 else
426 writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
427
428 /* Push back HDMI clock settings */
429 writel_bits_relaxed(0xf << 8, wr_clk & (0xf << 8),
430 priv->io_base + _REG(VPU_HDMI_SETTING));
431
432 /* Enable and Select HDMI video source for HDMI-TX */
433 if (priv->venc.hdmi_use_enci)
434 writel_bits_relaxed(0x3, MESON_VENC_SOURCE_ENCI,
435 priv->io_base + _REG(VPU_HDMI_SETTING));
436 else
437 writel_bits_relaxed(0x3, MESON_VENC_SOURCE_ENCP,
438 priv->io_base + _REG(VPU_HDMI_SETTING));
439
440 return 0;
441}
442
443static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi,
444 void *data)
445{
446 struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
447 struct meson_drm *priv = dw_hdmi->priv;
448
449 DRM_DEBUG_DRIVER("\n");
450
451 /* Fallback to init mode */
452 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL1, dw_hdmi->data->cntl1_init);
453 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, dw_hdmi->data->cntl0_init);
454}
455
456static enum drm_connector_status dw_hdmi_read_hpd(struct dw_hdmi *hdmi,
457 void *data)
458{
459 struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
460
461 return !!dw_hdmi->data->top_read(dw_hdmi, HDMITX_TOP_STAT0) ?
462 connector_status_connected : connector_status_disconnected;
463}
464
465static void dw_hdmi_setup_hpd(struct dw_hdmi *hdmi,
466 void *data)
467{
468 struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
469
470 /* Setup HPD Filter */
471 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_HPD_FILTER,
472 (0xa << 12) | 0xa0);
473
474 /* Clear interrupts */
475 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR,
476 HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL);
477
478 /* Unmask interrupts */
479 dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_INTR_MASKN,
480 HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL,
481 HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL);
482}
483
484static const struct dw_hdmi_phy_ops meson_dw_hdmi_phy_ops = {
485 .init = dw_hdmi_phy_init,
486 .disable = dw_hdmi_phy_disable,
487 .read_hpd = dw_hdmi_read_hpd,
488 .setup_hpd = dw_hdmi_setup_hpd,
489};
490
491static irqreturn_t dw_hdmi_top_irq(int irq, void *dev_id)
492{
493 struct meson_dw_hdmi *dw_hdmi = dev_id;
494 u32 stat;
495
496 stat = dw_hdmi->data->top_read(dw_hdmi, HDMITX_TOP_INTR_STAT);
497 dw_hdmi->data->top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, stat);
498
499 /* HPD Events, handle in the threaded interrupt handler */
500 if (stat & (HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL)) {
501 dw_hdmi->irq_stat = stat;
502 return IRQ_WAKE_THREAD;
503 }
504
505 /* HDMI Controller Interrupt */
506 if (stat & 1)
507 return IRQ_NONE;
508
509 /* TOFIX Handle HDCP Interrupts */
510
511 return IRQ_HANDLED;
512}
513
514/* Threaded interrupt handler to manage HPD events */
515static irqreturn_t dw_hdmi_top_thread_irq(int irq, void *dev_id)
516{
517 struct meson_dw_hdmi *dw_hdmi = dev_id;
518 u32 stat = dw_hdmi->irq_stat;
519
520 /* HPD Events */
521 if (stat & (HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL)) {
522 bool hpd_connected = false;
523
524 if (stat & HDMITX_TOP_INTR_HPD_RISE)
525 hpd_connected = true;
526
527 dw_hdmi_setup_rx_sense(dw_hdmi->hdmi, hpd_connected,
528 hpd_connected);
529
530 drm_helper_hpd_irq_event(dw_hdmi->bridge->dev);
531 drm_bridge_hpd_notify(dw_hdmi->bridge,
532 hpd_connected ? connector_status_connected
533 : connector_status_disconnected);
534 }
535
536 return IRQ_HANDLED;
537}
538
539/* DW HDMI Regmap */
540
541static int meson_dw_hdmi_reg_read(void *context, unsigned int reg,
542 unsigned int *result)
543{
544 struct meson_dw_hdmi *dw_hdmi = context;
545
546 *result = dw_hdmi->data->dwc_read(dw_hdmi, reg);
547
548 return 0;
549
550}
551
552static int meson_dw_hdmi_reg_write(void *context, unsigned int reg,
553 unsigned int val)
554{
555 struct meson_dw_hdmi *dw_hdmi = context;
556
557 dw_hdmi->data->dwc_write(dw_hdmi, reg, val);
558
559 return 0;
560}
561
562static const struct regmap_config meson_dw_hdmi_regmap_config = {
563 .reg_bits = 32,
564 .val_bits = 8,
565 .reg_read = meson_dw_hdmi_reg_read,
566 .reg_write = meson_dw_hdmi_reg_write,
567 .max_register = 0x10000,
568 .fast_io = true,
569};
570
571static const struct meson_dw_hdmi_data meson_dw_hdmi_gxbb_data = {
572 .top_read = dw_hdmi_top_read,
573 .top_write = dw_hdmi_top_write,
574 .dwc_read = dw_hdmi_dwc_read,
575 .dwc_write = dw_hdmi_dwc_write,
576 .cntl0_init = 0x0,
577 .cntl1_init = PHY_CNTL1_INIT | PHY_INVERT,
578};
579
580static const struct meson_dw_hdmi_data meson_dw_hdmi_gxl_data = {
581 .top_read = dw_hdmi_top_read,
582 .top_write = dw_hdmi_top_write,
583 .dwc_read = dw_hdmi_dwc_read,
584 .dwc_write = dw_hdmi_dwc_write,
585 .cntl0_init = 0x0,
586 .cntl1_init = PHY_CNTL1_INIT,
587};
588
589static const struct meson_dw_hdmi_data meson_dw_hdmi_g12a_data = {
590 .top_read = dw_hdmi_g12a_top_read,
591 .top_write = dw_hdmi_g12a_top_write,
592 .dwc_read = dw_hdmi_g12a_dwc_read,
593 .dwc_write = dw_hdmi_g12a_dwc_write,
594 .cntl0_init = 0x000b4242, /* Bandgap */
595 .cntl1_init = PHY_CNTL1_INIT,
596};
597
598static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
599{
600 struct meson_drm *priv = meson_dw_hdmi->priv;
601
602 /* Enable clocks */
603 regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, 0xffff, 0x100);
604
605 /* Bring HDMITX MEM output of power down */
606 regmap_update_bits(priv->hhi, HHI_MEM_PD_REG0, 0xff << 8, 0);
607
608 /* Reset HDMITX APB & TX & PHY */
609 reset_control_reset(meson_dw_hdmi->hdmitx_apb);
610 reset_control_reset(meson_dw_hdmi->hdmitx_ctrl);
611 reset_control_reset(meson_dw_hdmi->hdmitx_phy);
612
613 /* Enable APB3 fail on error */
614 if (!meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
615 writel_bits_relaxed(BIT(15), BIT(15),
616 meson_dw_hdmi->hdmitx + HDMITX_TOP_CTRL_REG);
617 writel_bits_relaxed(BIT(15), BIT(15),
618 meson_dw_hdmi->hdmitx + HDMITX_DWC_CTRL_REG);
619 }
620
621 /* Bring out of reset */
622 meson_dw_hdmi->data->top_write(meson_dw_hdmi,
623 HDMITX_TOP_SW_RESET, 0);
624
625 msleep(20);
626
627 meson_dw_hdmi->data->top_write(meson_dw_hdmi,
628 HDMITX_TOP_CLK_CNTL, 0xff);
629
630 /* Enable normal output to PHY */
631 meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_BIST_CNTL, BIT(12));
632
633 /* Setup PHY */
634 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL1, meson_dw_hdmi->data->cntl1_init);
635 regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, meson_dw_hdmi->data->cntl0_init);
636
637 /* Enable HDMI-TX Interrupt */
638 meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_INTR_STAT_CLR,
639 HDMITX_TOP_INTR_CORE);
640
641 meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_INTR_MASKN,
642 HDMITX_TOP_INTR_CORE);
643
644}
645
646static void meson_disable_clk(void *data)
647{
648 clk_disable_unprepare(data);
649}
650
651static int meson_enable_clk(struct device *dev, char *name)
652{
653 struct clk *clk;
654 int ret;
655
656 clk = devm_clk_get(dev, name);
657 if (IS_ERR(clk)) {
658 dev_err(dev, "Unable to get %s pclk\n", name);
659 return PTR_ERR(clk);
660 }
661
662 ret = clk_prepare_enable(clk);
663 if (!ret)
664 ret = devm_add_action_or_reset(dev, meson_disable_clk, clk);
665
666 return ret;
667}
668
669static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
670 void *data)
671{
672 struct platform_device *pdev = to_platform_device(dev);
673 const struct meson_dw_hdmi_data *match;
674 struct meson_dw_hdmi *meson_dw_hdmi;
675 struct drm_device *drm = data;
676 struct meson_drm *priv = drm->dev_private;
677 struct dw_hdmi_plat_data *dw_plat_data;
678 int irq;
679 int ret;
680
681 DRM_DEBUG_DRIVER("\n");
682
683 match = of_device_get_match_data(&pdev->dev);
684 if (!match) {
685 dev_err(&pdev->dev, "failed to get match data\n");
686 return -ENODEV;
687 }
688
689 meson_dw_hdmi = devm_kzalloc(dev, sizeof(*meson_dw_hdmi),
690 GFP_KERNEL);
691 if (!meson_dw_hdmi)
692 return -ENOMEM;
693
694 meson_dw_hdmi->priv = priv;
695 meson_dw_hdmi->dev = dev;
696 meson_dw_hdmi->data = match;
697 dw_plat_data = &meson_dw_hdmi->dw_plat_data;
698
699 ret = devm_regulator_get_enable_optional(dev, "hdmi");
700 if (ret < 0 && ret != -ENODEV)
701 return ret;
702
703 meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev,
704 "hdmitx_apb");
705 if (IS_ERR(meson_dw_hdmi->hdmitx_apb)) {
706 dev_err(dev, "Failed to get hdmitx_apb reset\n");
707 return PTR_ERR(meson_dw_hdmi->hdmitx_apb);
708 }
709
710 meson_dw_hdmi->hdmitx_ctrl = devm_reset_control_get_exclusive(dev,
711 "hdmitx");
712 if (IS_ERR(meson_dw_hdmi->hdmitx_ctrl)) {
713 dev_err(dev, "Failed to get hdmitx reset\n");
714 return PTR_ERR(meson_dw_hdmi->hdmitx_ctrl);
715 }
716
717 meson_dw_hdmi->hdmitx_phy = devm_reset_control_get_exclusive(dev,
718 "hdmitx_phy");
719 if (IS_ERR(meson_dw_hdmi->hdmitx_phy)) {
720 dev_err(dev, "Failed to get hdmitx_phy reset\n");
721 return PTR_ERR(meson_dw_hdmi->hdmitx_phy);
722 }
723
724 meson_dw_hdmi->hdmitx = devm_platform_ioremap_resource(pdev, 0);
725 if (IS_ERR(meson_dw_hdmi->hdmitx))
726 return PTR_ERR(meson_dw_hdmi->hdmitx);
727
728 ret = meson_enable_clk(dev, "isfr");
729 if (ret)
730 return ret;
731
732 ret = meson_enable_clk(dev, "iahb");
733 if (ret)
734 return ret;
735
736 ret = meson_enable_clk(dev, "venci");
737 if (ret)
738 return ret;
739
740 dw_plat_data->regm = devm_regmap_init(dev, NULL, meson_dw_hdmi,
741 &meson_dw_hdmi_regmap_config);
742 if (IS_ERR(dw_plat_data->regm))
743 return PTR_ERR(dw_plat_data->regm);
744
745 irq = platform_get_irq(pdev, 0);
746 if (irq < 0)
747 return irq;
748
749 ret = devm_request_threaded_irq(dev, irq, dw_hdmi_top_irq,
750 dw_hdmi_top_thread_irq, IRQF_SHARED,
751 "dw_hdmi_top_irq", meson_dw_hdmi);
752 if (ret) {
753 dev_err(dev, "Failed to request hdmi top irq\n");
754 return ret;
755 }
756
757 meson_dw_hdmi_init(meson_dw_hdmi);
758
759 /* Bridge / Connector */
760
761 dw_plat_data->priv_data = meson_dw_hdmi;
762 dw_plat_data->phy_ops = &meson_dw_hdmi_phy_ops;
763 dw_plat_data->phy_name = "meson_dw_hdmi_phy";
764 dw_plat_data->phy_data = meson_dw_hdmi;
765 dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
766 dw_plat_data->ycbcr_420_allowed = true;
767 dw_plat_data->disable_cec = true;
768 dw_plat_data->output_port = 1;
769
770 if (dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
771 dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-gxm-dw-hdmi") ||
772 dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-g12a-dw-hdmi"))
773 dw_plat_data->use_drm_infoframe = true;
774
775 platform_set_drvdata(pdev, meson_dw_hdmi);
776
777 meson_dw_hdmi->hdmi = dw_hdmi_probe(pdev, &meson_dw_hdmi->dw_plat_data);
778 if (IS_ERR(meson_dw_hdmi->hdmi))
779 return PTR_ERR(meson_dw_hdmi->hdmi);
780
781 meson_dw_hdmi->bridge = of_drm_find_bridge(pdev->dev.of_node);
782
783 DRM_DEBUG_DRIVER("HDMI controller initialized\n");
784
785 return 0;
786}
787
788static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
789 void *data)
790{
791 struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
792
793 dw_hdmi_unbind(meson_dw_hdmi->hdmi);
794}
795
796static const struct component_ops meson_dw_hdmi_ops = {
797 .bind = meson_dw_hdmi_bind,
798 .unbind = meson_dw_hdmi_unbind,
799};
800
801static int __maybe_unused meson_dw_hdmi_pm_suspend(struct device *dev)
802{
803 struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
804
805 if (!meson_dw_hdmi)
806 return 0;
807
808 /* Reset TOP */
809 meson_dw_hdmi->data->top_write(meson_dw_hdmi,
810 HDMITX_TOP_SW_RESET, 0);
811
812 return 0;
813}
814
815static int __maybe_unused meson_dw_hdmi_pm_resume(struct device *dev)
816{
817 struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
818
819 if (!meson_dw_hdmi)
820 return 0;
821
822 meson_dw_hdmi_init(meson_dw_hdmi);
823
824 dw_hdmi_resume(meson_dw_hdmi->hdmi);
825
826 return 0;
827}
828
829static int meson_dw_hdmi_probe(struct platform_device *pdev)
830{
831 return component_add(&pdev->dev, &meson_dw_hdmi_ops);
832}
833
834static void meson_dw_hdmi_remove(struct platform_device *pdev)
835{
836 component_del(&pdev->dev, &meson_dw_hdmi_ops);
837}
838
839static const struct dev_pm_ops meson_dw_hdmi_pm_ops = {
840 SET_SYSTEM_SLEEP_PM_OPS(meson_dw_hdmi_pm_suspend,
841 meson_dw_hdmi_pm_resume)
842};
843
844static const struct of_device_id meson_dw_hdmi_of_table[] = {
845 { .compatible = "amlogic,meson-gxbb-dw-hdmi",
846 .data = &meson_dw_hdmi_gxbb_data },
847 { .compatible = "amlogic,meson-gxl-dw-hdmi",
848 .data = &meson_dw_hdmi_gxl_data },
849 { .compatible = "amlogic,meson-gxm-dw-hdmi",
850 .data = &meson_dw_hdmi_gxl_data },
851 { .compatible = "amlogic,meson-g12a-dw-hdmi",
852 .data = &meson_dw_hdmi_g12a_data },
853 { }
854};
855MODULE_DEVICE_TABLE(of, meson_dw_hdmi_of_table);
856
857static struct platform_driver meson_dw_hdmi_platform_driver = {
858 .probe = meson_dw_hdmi_probe,
859 .remove = meson_dw_hdmi_remove,
860 .driver = {
861 .name = DRIVER_NAME,
862 .of_match_table = meson_dw_hdmi_of_table,
863 .pm = &meson_dw_hdmi_pm_ops,
864 },
865};
866module_platform_driver(meson_dw_hdmi_platform_driver);
867
868MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
869MODULE_DESCRIPTION(DRIVER_DESC);
870MODULE_LICENSE("GPL");