1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
4 * Copyright (c) 2019-2020. Linaro Limited.
7 #include <linux/gpio/consumer.h>
8 #include <linux/interrupt.h>
9 #include <linux/module.h>
10 #include <linux/of_graph.h>
11 #include <linux/platform_device.h>
12 #include <linux/regmap.h>
13 #include <linux/regulator/consumer.h>
15 #include <sound/hdmi-codec.h>
17 #include <drm/drm_atomic_helper.h>
18 #include <drm/drm_bridge.h>
19 #include <drm/drm_mipi_dsi.h>
20 #include <drm/drm_print.h>
21 #include <drm/drm_probe_helper.h>
23 #define EDID_SEG_SIZE 256
26 #define KEY_DDC_ACCS_DONE 0x02
27 #define DDC_NO_ACK 0x50
29 #define LT9611_4LANES 0
33 struct drm_bridge bridge;
34 struct drm_connector connector;
36 struct regmap *regmap;
38 struct device_node *dsi0_node;
39 struct device_node *dsi1_node;
40 struct mipi_dsi_device *dsi0;
41 struct mipi_dsi_device *dsi1;
42 struct platform_device *audio_pdev;
46 struct gpio_desc *reset_gpio;
47 struct gpio_desc *enable_gpio;
52 struct regulator_bulk_data supplies[2];
54 struct i2c_client *client;
56 enum drm_connector_status status;
58 u8 edid_buf[EDID_SEG_SIZE];
62 #define LT9611_PAGE_CONTROL 0xff
64 static const struct regmap_range_cfg lt9611_ranges[] = {
66 .name = "register_range",
69 .selector_reg = LT9611_PAGE_CONTROL,
70 .selector_mask = 0xff,
77 static const struct regmap_config lt9611_regmap_config = {
80 .max_register = 0xffff,
81 .ranges = lt9611_ranges,
82 .num_ranges = ARRAY_SIZE(lt9611_ranges),
93 static struct lt9611_mode lt9611_modes[] = {
94 { 3840, 2160, 30, 4, 2 }, /* 3840x2160 24bit 30Hz 4Lane 2ports */
95 { 1920, 1080, 60, 4, 1 }, /* 1080P 24bit 60Hz 4lane 1port */
96 { 1920, 1080, 30, 3, 1 }, /* 1080P 24bit 30Hz 3lane 1port */
97 { 1920, 1080, 24, 3, 1 },
98 { 720, 480, 60, 4, 1 },
99 { 720, 576, 50, 2, 1 },
100 { 640, 480, 60, 2, 1 },
103 static struct lt9611 *bridge_to_lt9611(struct drm_bridge *bridge)
105 return container_of(bridge, struct lt9611, bridge);
108 static struct lt9611 *connector_to_lt9611(struct drm_connector *connector)
110 return container_of(connector, struct lt9611, connector);
113 static int lt9611_mipi_input_analog(struct lt9611 *lt9611)
115 const struct reg_sequence reg_cfg[] = {
116 { 0x8106, 0x40 }, /* port A rx current */
117 { 0x810a, 0xfe }, /* port A ldo voltage set */
118 { 0x810b, 0xbf }, /* enable port A lprx */
119 { 0x8111, 0x40 }, /* port B rx current */
120 { 0x8115, 0xfe }, /* port B ldo voltage set */
121 { 0x8116, 0xbf }, /* enable port B lprx */
123 { 0x811c, 0x03 }, /* PortA clk lane no-LP mode */
124 { 0x8120, 0x03 }, /* PortB clk lane with-LP mode */
127 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
130 static int lt9611_mipi_input_digital(struct lt9611 *lt9611,
131 const struct drm_display_mode *mode)
133 struct reg_sequence reg_cfg[] = {
134 { 0x8300, LT9611_4LANES },
142 if (mode->hdisplay == 3840)
143 reg_cfg[1].def = 0x03;
145 return regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
148 static void lt9611_mipi_video_setup(struct lt9611 *lt9611,
149 const struct drm_display_mode *mode)
151 u32 h_total, hactive, hsync_len, hfront_porch, hsync_porch;
152 u32 v_total, vactive, vsync_len, vfront_porch, vsync_porch;
154 h_total = mode->htotal;
155 v_total = mode->vtotal;
157 hactive = mode->hdisplay;
158 hsync_len = mode->hsync_end - mode->hsync_start;
159 hfront_porch = mode->hsync_start - mode->hdisplay;
160 hsync_porch = hsync_len + mode->htotal - mode->hsync_end;
162 vactive = mode->vdisplay;
163 vsync_len = mode->vsync_end - mode->vsync_start;
164 vfront_porch = mode->vsync_start - mode->vdisplay;
165 vsync_porch = vsync_len + mode->vtotal - mode->vsync_end;
167 regmap_write(lt9611->regmap, 0x830d, (u8)(v_total / 256));
168 regmap_write(lt9611->regmap, 0x830e, (u8)(v_total % 256));
170 regmap_write(lt9611->regmap, 0x830f, (u8)(vactive / 256));
171 regmap_write(lt9611->regmap, 0x8310, (u8)(vactive % 256));
173 regmap_write(lt9611->regmap, 0x8311, (u8)(h_total / 256));
174 regmap_write(lt9611->regmap, 0x8312, (u8)(h_total % 256));
176 regmap_write(lt9611->regmap, 0x8313, (u8)(hactive / 256));
177 regmap_write(lt9611->regmap, 0x8314, (u8)(hactive % 256));
179 regmap_write(lt9611->regmap, 0x8315, (u8)(vsync_len % 256));
180 regmap_write(lt9611->regmap, 0x8316, (u8)(hsync_len % 256));
182 regmap_write(lt9611->regmap, 0x8317, (u8)(vfront_porch % 256));
184 regmap_write(lt9611->regmap, 0x8318, (u8)(vsync_porch % 256));
186 regmap_write(lt9611->regmap, 0x8319, (u8)(hfront_porch % 256));
188 regmap_write(lt9611->regmap, 0x831a, (u8)(hsync_porch / 256));
189 regmap_write(lt9611->regmap, 0x831b, (u8)(hsync_porch % 256));
192 static void lt9611_pcr_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode)
194 const struct reg_sequence reg_cfg[] = {
214 const struct reg_sequence reg_cfg2[] = {
227 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
229 switch (mode->hdisplay) {
231 regmap_write(lt9611->regmap, 0x8326, 0x14);
234 regmap_write(lt9611->regmap, 0x8326, 0x37);
237 regmap_multi_reg_write(lt9611->regmap, reg_cfg2, ARRAY_SIZE(reg_cfg2));
242 regmap_write(lt9611->regmap, 0x8011, 0x5a);
243 regmap_write(lt9611->regmap, 0x8011, 0xfa);
246 static int lt9611_pll_setup(struct lt9611 *lt9611, const struct drm_display_mode *mode)
248 unsigned int pclk = mode->clock;
249 const struct reg_sequence reg_cfg[] = {
262 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
265 regmap_write(lt9611->regmap, 0x812d, 0x88);
266 else if (pclk > 70000)
267 regmap_write(lt9611->regmap, 0x812d, 0x99);
269 regmap_write(lt9611->regmap, 0x812d, 0xaa);
272 * first divide pclk by 2 first
273 * - write divide by 64k to 19:16 bits which means shift by 17
274 * - write divide by 256 to 15:8 bits which means shift by 9
275 * - write remainder to 7:0 bits, which means shift by 1
277 regmap_write(lt9611->regmap, 0x82e3, pclk >> 17); /* pclk[19:16] */
278 regmap_write(lt9611->regmap, 0x82e4, pclk >> 9); /* pclk[15:8] */
279 regmap_write(lt9611->regmap, 0x82e5, pclk >> 1); /* pclk[7:0] */
281 regmap_write(lt9611->regmap, 0x82de, 0x20);
282 regmap_write(lt9611->regmap, 0x82de, 0xe0);
284 regmap_write(lt9611->regmap, 0x8016, 0xf1);
285 regmap_write(lt9611->regmap, 0x8016, 0xf3);
290 static int lt9611_read_video_check(struct lt9611 *lt9611, unsigned int reg)
292 unsigned int temp, temp2;
295 ret = regmap_read(lt9611->regmap, reg, &temp);
299 ret = regmap_read(lt9611->regmap, reg + 1, &temp2);
303 return (temp + temp2);
306 static int lt9611_video_check(struct lt9611 *lt9611)
308 u32 v_total, vactive, hactive_a, hactive_b, h_total_sysclk;
311 /* top module video check */
314 temp = lt9611_read_video_check(lt9611, 0x8282);
320 temp = lt9611_read_video_check(lt9611, 0x826c);
326 temp = lt9611_read_video_check(lt9611, 0x8286);
329 h_total_sysclk = temp;
332 temp = lt9611_read_video_check(lt9611, 0x8382);
335 hactive_a = temp / 3;
338 temp = lt9611_read_video_check(lt9611, 0x8386);
341 hactive_b = temp / 3;
343 dev_info(lt9611->dev,
344 "video check: hactive_a=%d, hactive_b=%d, vactive=%d, v_total=%d, h_total_sysclk=%d\n",
345 hactive_a, hactive_b, vactive, v_total, h_total_sysclk);
350 dev_err(lt9611->dev, "read video check error\n");
354 static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611)
356 regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic);
357 regmap_write(lt9611->regmap, 0x8447, lt9611->vic);
358 regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */
360 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
361 regmap_write(lt9611->regmap, 0x82d7, 0x04);
364 static void lt9611_hdmi_tx_phy(struct lt9611 *lt9611)
366 struct reg_sequence reg_cfg[] = {
368 { 0x8131, 0x44 }, /* HDMI DC mode */
385 reg_cfg[2].def = 0x73;
387 regmap_multi_reg_write(lt9611->regmap, reg_cfg, ARRAY_SIZE(reg_cfg));
390 static irqreturn_t lt9611_irq_thread_handler(int irq, void *dev_id)
392 struct lt9611 *lt9611 = dev_id;
393 unsigned int irq_flag0 = 0;
394 unsigned int irq_flag3 = 0;
396 regmap_read(lt9611->regmap, 0x820f, &irq_flag3);
397 regmap_read(lt9611->regmap, 0x820c, &irq_flag0);
399 /* hpd changed low */
400 if (irq_flag3 & 0x80) {
401 dev_info(lt9611->dev, "hdmi cable disconnected\n");
403 regmap_write(lt9611->regmap, 0x8207, 0xbf);
404 regmap_write(lt9611->regmap, 0x8207, 0x3f);
407 /* hpd changed high */
408 if (irq_flag3 & 0x40) {
409 dev_info(lt9611->dev, "hdmi cable connected\n");
411 regmap_write(lt9611->regmap, 0x8207, 0x7f);
412 regmap_write(lt9611->regmap, 0x8207, 0x3f);
415 if (irq_flag3 & 0xc0 && lt9611->bridge.dev)
416 drm_kms_helper_hotplug_event(lt9611->bridge.dev);
418 /* video input changed */
419 if (irq_flag0 & 0x01) {
420 dev_info(lt9611->dev, "video input changed\n");
421 regmap_write(lt9611->regmap, 0x829e, 0xff);
422 regmap_write(lt9611->regmap, 0x829e, 0xf7);
423 regmap_write(lt9611->regmap, 0x8204, 0xff);
424 regmap_write(lt9611->regmap, 0x8204, 0xfe);
430 static void lt9611_enable_hpd_interrupts(struct lt9611 *lt9611)
434 regmap_read(lt9611->regmap, 0x8203, &val);
437 regmap_write(lt9611->regmap, 0x8203, val);
438 regmap_write(lt9611->regmap, 0x8207, 0xff); /* clear */
439 regmap_write(lt9611->regmap, 0x8207, 0x3f);
442 static void lt9611_sleep_setup(struct lt9611 *lt9611)
444 const struct reg_sequence sleep_setup[] = {
447 { 0x8157, 0x03 }, /* set addr pin as output */
449 { 0x8151, 0x30 }, /* disable IRQ */
450 { 0x8102, 0x48 }, /* MIPI Rx power down */
453 { 0x8100, 0x01 }, /* bandgap power down */
454 { 0x8101, 0x00 }, /* system clk power down */
457 regmap_multi_reg_write(lt9611->regmap,
458 sleep_setup, ARRAY_SIZE(sleep_setup));
459 lt9611->sleep = true;
462 static int lt9611_power_on(struct lt9611 *lt9611)
465 const struct reg_sequence seq[] = {
466 /* LT9611_System_Init */
467 { 0x8101, 0x18 }, /* sel xtal clock */
469 /* timer for frequency meter */
470 { 0x821b, 0x69 }, /* timer 2 */
472 { 0x82cb, 0x69 }, /* timer 1 */
477 { 0x8258, 0x0a }, /* hpd irq */
478 { 0x8259, 0x80 }, /* hpd debounce width */
479 { 0x829e, 0xf7 }, /* video check irq */
481 /* power consumption for work */
490 if (lt9611->power_on)
493 ret = regmap_multi_reg_write(lt9611->regmap, seq, ARRAY_SIZE(seq));
495 lt9611->power_on = true;
500 static int lt9611_power_off(struct lt9611 *lt9611)
504 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
506 lt9611->power_on = false;
511 static void lt9611_reset(struct lt9611 *lt9611)
513 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
516 gpiod_set_value_cansleep(lt9611->reset_gpio, 0);
519 gpiod_set_value_cansleep(lt9611->reset_gpio, 1);
523 static void lt9611_assert_5v(struct lt9611 *lt9611)
525 if (!lt9611->enable_gpio)
528 gpiod_set_value_cansleep(lt9611->enable_gpio, 1);
532 static int lt9611_regulator_init(struct lt9611 *lt9611)
536 lt9611->supplies[0].supply = "vdd";
537 lt9611->supplies[1].supply = "vcc";
539 ret = devm_regulator_bulk_get(lt9611->dev, 2, lt9611->supplies);
543 return regulator_set_load(lt9611->supplies[0].consumer, 300000);
546 static int lt9611_regulator_enable(struct lt9611 *lt9611)
550 ret = regulator_enable(lt9611->supplies[0].consumer);
554 usleep_range(1000, 10000);
556 ret = regulator_enable(lt9611->supplies[1].consumer);
558 regulator_disable(lt9611->supplies[0].consumer);
565 static struct lt9611_mode *lt9611_find_mode(const struct drm_display_mode *mode)
569 for (i = 0; i < ARRAY_SIZE(lt9611_modes); i++) {
570 if (lt9611_modes[i].hdisplay == mode->hdisplay &&
571 lt9611_modes[i].vdisplay == mode->vdisplay &&
572 lt9611_modes[i].vrefresh == drm_mode_vrefresh(mode)) {
573 return <9611_modes[i];
580 /* connector funcs */
581 static enum drm_connector_status
582 lt9611_connector_detect(struct drm_connector *connector, bool force)
584 struct lt9611 *lt9611 = connector_to_lt9611(connector);
585 unsigned int reg_val = 0;
588 regmap_read(lt9611->regmap, 0x825e, ®_val);
589 connected = (reg_val & BIT(2));
591 lt9611->status = connected ? connector_status_connected :
592 connector_status_disconnected;
594 return lt9611->status;
597 static int lt9611_read_edid(struct lt9611 *lt9611)
603 /* memset to clear old buffer, if any */
604 memset(lt9611->edid_buf, 0, sizeof(lt9611->edid_buf));
606 regmap_write(lt9611->regmap, 0x8503, 0xc9);
608 /* 0xA0 is EDID device address */
609 regmap_write(lt9611->regmap, 0x8504, 0xa0);
610 /* 0x00 is EDID offset address */
611 regmap_write(lt9611->regmap, 0x8505, 0x00);
613 /* length for read */
614 regmap_write(lt9611->regmap, 0x8506, EDID_LEN);
615 regmap_write(lt9611->regmap, 0x8514, 0x7f);
617 for (i = 0; i < EDID_LOOP; i++) {
619 regmap_write(lt9611->regmap, 0x8505, i * EDID_LEN);
620 regmap_write(lt9611->regmap, 0x8507, 0x36);
621 regmap_write(lt9611->regmap, 0x8507, 0x31);
622 regmap_write(lt9611->regmap, 0x8507, 0x37);
623 usleep_range(5000, 10000);
625 regmap_read(lt9611->regmap, 0x8540, &temp);
627 if (temp & KEY_DDC_ACCS_DONE) {
628 for (j = 0; j < EDID_LEN; j++) {
629 regmap_read(lt9611->regmap, 0x8583, &temp);
630 lt9611->edid_buf[i * EDID_LEN + j] = temp;
633 } else if (temp & DDC_NO_ACK) { /* DDC No Ack or Abitration lost */
634 dev_err(lt9611->dev, "read edid failed: no ack\n");
639 dev_err(lt9611->dev, "read edid failed: access not done\n");
646 regmap_write(lt9611->regmap, 0x8507, 0x1f);
651 lt9611_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len)
653 struct lt9611 *lt9611 = data;
659 /* supports up to 1 extension block */
660 /* TODO: add support for more extension blocks */
665 ret = lt9611_read_edid(lt9611);
667 dev_err(lt9611->dev, "edid read failed\n");
673 memcpy(buf, lt9611->edid_buf + (block * 128), len);
678 static int lt9611_connector_get_modes(struct drm_connector *connector)
680 struct lt9611 *lt9611 = connector_to_lt9611(connector);
684 lt9611_power_on(lt9611);
685 edid = drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
686 drm_connector_update_edid_property(connector, edid);
687 count = drm_add_edid_modes(connector, edid);
693 static enum drm_mode_status
694 lt9611_connector_mode_valid(struct drm_connector *connector,
695 struct drm_display_mode *mode)
697 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
699 return lt9611_mode ? MODE_OK : MODE_BAD;
703 static void lt9611_bridge_enable(struct drm_bridge *bridge)
705 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
707 if (lt9611_power_on(lt9611)) {
708 dev_err(lt9611->dev, "power on failed\n");
712 lt9611_mipi_input_analog(lt9611);
713 lt9611_hdmi_tx_digital(lt9611);
714 lt9611_hdmi_tx_phy(lt9611);
718 lt9611_video_check(lt9611);
720 /* Enable HDMI output */
721 regmap_write(lt9611->regmap, 0x8130, 0xea);
724 static void lt9611_bridge_disable(struct drm_bridge *bridge)
726 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
729 /* Disable HDMI output */
730 ret = regmap_write(lt9611->regmap, 0x8130, 0x6a);
732 dev_err(lt9611->dev, "video on failed\n");
736 if (lt9611_power_off(lt9611)) {
737 dev_err(lt9611->dev, "power on failed\n");
743 drm_connector_helper_funcs lt9611_bridge_connector_helper_funcs = {
744 .get_modes = lt9611_connector_get_modes,
745 .mode_valid = lt9611_connector_mode_valid,
748 static const struct drm_connector_funcs lt9611_bridge_connector_funcs = {
749 .fill_modes = drm_helper_probe_single_connector_modes,
750 .detect = lt9611_connector_detect,
751 .destroy = drm_connector_cleanup,
752 .reset = drm_atomic_helper_connector_reset,
753 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
754 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
757 static struct mipi_dsi_device *lt9611_attach_dsi(struct lt9611 *lt9611,
758 struct device_node *dsi_node)
760 const struct mipi_dsi_device_info info = { "lt9611", 0, NULL };
761 struct mipi_dsi_device *dsi;
762 struct mipi_dsi_host *host;
765 host = of_find_mipi_dsi_host_by_node(dsi_node);
767 dev_err(lt9611->dev, "failed to find dsi host\n");
768 return ERR_PTR(-EPROBE_DEFER);
771 dsi = mipi_dsi_device_register_full(host, &info);
773 dev_err(lt9611->dev, "failed to create dsi device\n");
778 dsi->format = MIPI_DSI_FMT_RGB888;
779 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
780 MIPI_DSI_MODE_VIDEO_HSE;
782 ret = mipi_dsi_attach(dsi);
784 dev_err(lt9611->dev, "failed to attach dsi to host\n");
785 mipi_dsi_device_unregister(dsi);
792 static void lt9611_bridge_detach(struct drm_bridge *bridge)
794 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
797 mipi_dsi_detach(lt9611->dsi1);
798 mipi_dsi_device_unregister(lt9611->dsi1);
801 mipi_dsi_detach(lt9611->dsi0);
802 mipi_dsi_device_unregister(lt9611->dsi0);
805 static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt9611)
809 ret = drm_connector_init(bridge->dev, <9611->connector,
810 <9611_bridge_connector_funcs,
811 DRM_MODE_CONNECTOR_HDMIA);
813 DRM_ERROR("Failed to initialize connector with drm\n");
817 drm_connector_helper_add(<9611->connector,
818 <9611_bridge_connector_helper_funcs);
820 if (!bridge->encoder) {
821 DRM_ERROR("Parent encoder object not found");
825 drm_connector_attach_encoder(<9611->connector, bridge->encoder);
830 static int lt9611_bridge_attach(struct drm_bridge *bridge,
831 enum drm_bridge_attach_flags flags)
833 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
836 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
837 ret = lt9611_connector_init(bridge, lt9611);
842 /* Attach primary DSI */
843 lt9611->dsi0 = lt9611_attach_dsi(lt9611, lt9611->dsi0_node);
844 if (IS_ERR(lt9611->dsi0))
845 return PTR_ERR(lt9611->dsi0);
847 /* Attach secondary DSI, if specified */
848 if (lt9611->dsi1_node) {
849 lt9611->dsi1 = lt9611_attach_dsi(lt9611, lt9611->dsi1_node);
850 if (IS_ERR(lt9611->dsi1)) {
851 ret = PTR_ERR(lt9611->dsi1);
852 goto err_unregister_dsi0;
859 lt9611_bridge_detach(bridge);
860 drm_connector_cleanup(<9611->connector);
861 mipi_dsi_device_unregister(lt9611->dsi0);
866 static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge,
867 const struct drm_display_info *info,
868 const struct drm_display_mode *mode)
870 struct lt9611_mode *lt9611_mode = lt9611_find_mode(mode);
871 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
875 else if (lt9611_mode->intfs > 1 && !lt9611->dsi1)
881 static void lt9611_bridge_pre_enable(struct drm_bridge *bridge)
883 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
888 lt9611_reset(lt9611);
889 regmap_write(lt9611->regmap, 0x80ee, 0x01);
891 lt9611->sleep = false;
894 static void lt9611_bridge_post_disable(struct drm_bridge *bridge)
896 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
898 lt9611_sleep_setup(lt9611);
901 static void lt9611_bridge_mode_set(struct drm_bridge *bridge,
902 const struct drm_display_mode *mode,
903 const struct drm_display_mode *adj_mode)
905 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
906 struct hdmi_avi_infoframe avi_frame;
909 lt9611_bridge_pre_enable(bridge);
911 lt9611_mipi_input_digital(lt9611, mode);
912 lt9611_pll_setup(lt9611, mode);
913 lt9611_mipi_video_setup(lt9611, mode);
914 lt9611_pcr_setup(lt9611, mode);
916 ret = drm_hdmi_avi_infoframe_from_display_mode(&avi_frame,
920 lt9611->vic = avi_frame.video_code;
923 static enum drm_connector_status lt9611_bridge_detect(struct drm_bridge *bridge)
925 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
926 unsigned int reg_val = 0;
929 regmap_read(lt9611->regmap, 0x825e, ®_val);
930 connected = reg_val & BIT(2);
932 lt9611->status = connected ? connector_status_connected :
933 connector_status_disconnected;
935 return lt9611->status;
938 static struct edid *lt9611_bridge_get_edid(struct drm_bridge *bridge,
939 struct drm_connector *connector)
941 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
943 lt9611_power_on(lt9611);
944 return drm_do_get_edid(connector, lt9611_get_edid_block, lt9611);
947 static void lt9611_bridge_hpd_enable(struct drm_bridge *bridge)
949 struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
951 lt9611_enable_hpd_interrupts(lt9611);
954 static const struct drm_bridge_funcs lt9611_bridge_funcs = {
955 .attach = lt9611_bridge_attach,
956 .detach = lt9611_bridge_detach,
957 .mode_valid = lt9611_bridge_mode_valid,
958 .enable = lt9611_bridge_enable,
959 .disable = lt9611_bridge_disable,
960 .post_disable = lt9611_bridge_post_disable,
961 .mode_set = lt9611_bridge_mode_set,
962 .detect = lt9611_bridge_detect,
963 .get_edid = lt9611_bridge_get_edid,
964 .hpd_enable = lt9611_bridge_hpd_enable,
967 static int lt9611_parse_dt(struct device *dev,
968 struct lt9611 *lt9611)
970 lt9611->dsi0_node = of_graph_get_remote_node(dev->of_node, 0, -1);
971 if (!lt9611->dsi0_node) {
972 dev_err(lt9611->dev, "failed to get remote node for primary dsi\n");
976 lt9611->dsi1_node = of_graph_get_remote_node(dev->of_node, 1, -1);
978 lt9611->ac_mode = of_property_read_bool(dev->of_node, "lt,ac-mode");
983 static int lt9611_gpio_init(struct lt9611 *lt9611)
985 struct device *dev = lt9611->dev;
987 lt9611->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
988 if (IS_ERR(lt9611->reset_gpio)) {
989 dev_err(dev, "failed to acquire reset gpio\n");
990 return PTR_ERR(lt9611->reset_gpio);
993 lt9611->enable_gpio = devm_gpiod_get_optional(dev, "enable",
995 if (IS_ERR(lt9611->enable_gpio)) {
996 dev_err(dev, "failed to acquire enable gpio\n");
997 return PTR_ERR(lt9611->enable_gpio);
1003 static int lt9611_read_device_rev(struct lt9611 *lt9611)
1008 regmap_write(lt9611->regmap, 0x80ee, 0x01);
1009 ret = regmap_read(lt9611->regmap, 0x8002, &rev);
1011 dev_err(lt9611->dev, "failed to read revision: %d\n", ret);
1013 dev_info(lt9611->dev, "LT9611 revision: 0x%x\n", rev);
1018 static int lt9611_hdmi_hw_params(struct device *dev, void *data,
1019 struct hdmi_codec_daifmt *fmt,
1020 struct hdmi_codec_params *hparms)
1022 struct lt9611 *lt9611 = data;
1024 if (hparms->sample_rate == 48000)
1025 regmap_write(lt9611->regmap, 0x840f, 0x2b);
1026 else if (hparms->sample_rate == 96000)
1027 regmap_write(lt9611->regmap, 0x840f, 0xab);
1031 regmap_write(lt9611->regmap, 0x8435, 0x00);
1032 regmap_write(lt9611->regmap, 0x8436, 0x18);
1033 regmap_write(lt9611->regmap, 0x8437, 0x00);
1038 static int lt9611_audio_startup(struct device *dev, void *data)
1040 struct lt9611 *lt9611 = data;
1042 regmap_write(lt9611->regmap, 0x82d6, 0x8c);
1043 regmap_write(lt9611->regmap, 0x82d7, 0x04);
1045 regmap_write(lt9611->regmap, 0x8406, 0x08);
1046 regmap_write(lt9611->regmap, 0x8407, 0x10);
1048 regmap_write(lt9611->regmap, 0x8434, 0xd5);
1053 static void lt9611_audio_shutdown(struct device *dev, void *data)
1055 struct lt9611 *lt9611 = data;
1057 regmap_write(lt9611->regmap, 0x8406, 0x00);
1058 regmap_write(lt9611->regmap, 0x8407, 0x00);
1061 static int lt9611_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
1062 struct device_node *endpoint)
1064 struct of_endpoint of_ep;
1067 ret = of_graph_parse_endpoint(endpoint, &of_ep);
1072 * HDMI sound should be located as reg = <2>
1073 * Then, it is sound port 0
1075 if (of_ep.port == 2)
1081 static const struct hdmi_codec_ops lt9611_codec_ops = {
1082 .hw_params = lt9611_hdmi_hw_params,
1083 .audio_shutdown = lt9611_audio_shutdown,
1084 .audio_startup = lt9611_audio_startup,
1085 .get_dai_id = lt9611_hdmi_i2s_get_dai_id,
1088 static struct hdmi_codec_pdata codec_data = {
1089 .ops = <9611_codec_ops,
1090 .max_i2s_channels = 8,
1094 static int lt9611_audio_init(struct device *dev, struct lt9611 *lt9611)
1096 codec_data.data = lt9611;
1097 lt9611->audio_pdev =
1098 platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
1099 PLATFORM_DEVID_AUTO,
1100 &codec_data, sizeof(codec_data));
1102 return PTR_ERR_OR_ZERO(lt9611->audio_pdev);
1105 static void lt9611_audio_exit(struct lt9611 *lt9611)
1107 if (lt9611->audio_pdev) {
1108 platform_device_unregister(lt9611->audio_pdev);
1109 lt9611->audio_pdev = NULL;
1113 static int lt9611_probe(struct i2c_client *client,
1114 const struct i2c_device_id *id)
1116 struct lt9611 *lt9611;
1117 struct device *dev = &client->dev;
1120 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
1121 dev_err(dev, "device doesn't support I2C\n");
1125 lt9611 = devm_kzalloc(dev, sizeof(*lt9611), GFP_KERNEL);
1129 lt9611->dev = &client->dev;
1130 lt9611->client = client;
1131 lt9611->sleep = false;
1133 lt9611->regmap = devm_regmap_init_i2c(client, <9611_regmap_config);
1134 if (IS_ERR(lt9611->regmap)) {
1135 dev_err(lt9611->dev, "regmap i2c init failed\n");
1136 return PTR_ERR(lt9611->regmap);
1139 ret = lt9611_parse_dt(&client->dev, lt9611);
1141 dev_err(dev, "failed to parse device tree\n");
1145 ret = lt9611_gpio_init(lt9611);
1149 ret = lt9611_regulator_init(lt9611);
1153 lt9611_assert_5v(lt9611);
1155 ret = lt9611_regulator_enable(lt9611);
1159 lt9611_reset(lt9611);
1161 ret = lt9611_read_device_rev(lt9611);
1163 dev_err(dev, "failed to read chip rev\n");
1164 goto err_disable_regulators;
1167 ret = devm_request_threaded_irq(dev, client->irq, NULL,
1168 lt9611_irq_thread_handler,
1169 IRQF_ONESHOT, "lt9611", lt9611);
1171 dev_err(dev, "failed to request irq\n");
1172 goto err_disable_regulators;
1175 i2c_set_clientdata(client, lt9611);
1177 lt9611->bridge.funcs = <9611_bridge_funcs;
1178 lt9611->bridge.of_node = client->dev.of_node;
1179 lt9611->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
1180 DRM_BRIDGE_OP_HPD | DRM_BRIDGE_OP_MODES;
1181 lt9611->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
1183 drm_bridge_add(<9611->bridge);
1185 lt9611_enable_hpd_interrupts(lt9611);
1187 return lt9611_audio_init(dev, lt9611);
1189 err_disable_regulators:
1190 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1193 of_node_put(lt9611->dsi1_node);
1194 of_node_put(lt9611->dsi0_node);
1199 static int lt9611_remove(struct i2c_client *client)
1201 struct lt9611 *lt9611 = i2c_get_clientdata(client);
1203 disable_irq(client->irq);
1204 lt9611_audio_exit(lt9611);
1205 drm_bridge_remove(<9611->bridge);
1207 regulator_bulk_disable(ARRAY_SIZE(lt9611->supplies), lt9611->supplies);
1209 of_node_put(lt9611->dsi1_node);
1210 of_node_put(lt9611->dsi0_node);
1215 static struct i2c_device_id lt9611_id[] = {
1216 { "lontium,lt9611", 0 },
1219 MODULE_DEVICE_TABLE(i2c, lt9611_id);
1221 static const struct of_device_id lt9611_match_table[] = {
1222 { .compatible = "lontium,lt9611" },
1225 MODULE_DEVICE_TABLE(of, lt9611_match_table);
1227 static struct i2c_driver lt9611_driver = {
1230 .of_match_table = lt9611_match_table,
1232 .probe = lt9611_probe,
1233 .remove = lt9611_remove,
1234 .id_table = lt9611_id,
1236 module_i2c_driver(lt9611_driver);
1238 MODULE_LICENSE("GPL v2");