2 * Copyright © 2014 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
28 #include <drm/drm_crtc.h>
29 #include <drm/drm_edid.h>
30 #include <drm/i915_drm.h>
31 #include <linux/gpio/consumer.h>
32 #include <linux/slab.h>
33 #include <video/mipi_display.h>
34 #include <asm/intel-mid.h>
35 #include <video/mipi_display.h>
37 #include "intel_drv.h"
38 #include "intel_dsi.h"
40 #define MIPI_TRANSFER_MODE_SHIFT 0
41 #define MIPI_VIRTUAL_CHANNEL_SHIFT 1
42 #define MIPI_PORT_SHIFT 3
44 #define PREPARE_CNT_MAX 0x3F
45 #define EXIT_ZERO_CNT_MAX 0x3F
46 #define CLK_ZERO_CNT_MAX 0xFF
47 #define TRAIL_CNT_MAX 0x1F
49 #define NS_KHZ_RATIO 1000000
51 /* base offsets for gpio pads */
52 #define VLV_GPIO_NC_0_HV_DDI0_HPD 0x4130
53 #define VLV_GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120
54 #define VLV_GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110
55 #define VLV_GPIO_NC_3_PANEL0_VDDEN 0x4140
56 #define VLV_GPIO_NC_4_PANEL0_BKLTEN 0x4150
57 #define VLV_GPIO_NC_5_PANEL0_BKLTCTL 0x4160
58 #define VLV_GPIO_NC_6_HV_DDI1_HPD 0x4180
59 #define VLV_GPIO_NC_7_HV_DDI1_DDC_SDA 0x4190
60 #define VLV_GPIO_NC_8_HV_DDI1_DDC_SCL 0x4170
61 #define VLV_GPIO_NC_9_PANEL1_VDDEN 0x4100
62 #define VLV_GPIO_NC_10_PANEL1_BKLTEN 0x40E0
63 #define VLV_GPIO_NC_11_PANEL1_BKLTCTL 0x40F0
65 #define VLV_GPIO_PCONF0(base_offset) (base_offset)
66 #define VLV_GPIO_PAD_VAL(base_offset) ((base_offset) + 8)
73 static struct gpio_map vlv_gpio_table[] = {
74 { VLV_GPIO_NC_0_HV_DDI0_HPD },
75 { VLV_GPIO_NC_1_HV_DDI0_DDC_SDA },
76 { VLV_GPIO_NC_2_HV_DDI0_DDC_SCL },
77 { VLV_GPIO_NC_3_PANEL0_VDDEN },
78 { VLV_GPIO_NC_4_PANEL0_BKLTEN },
79 { VLV_GPIO_NC_5_PANEL0_BKLTCTL },
80 { VLV_GPIO_NC_6_HV_DDI1_HPD },
81 { VLV_GPIO_NC_7_HV_DDI1_DDC_SDA },
82 { VLV_GPIO_NC_8_HV_DDI1_DDC_SCL },
83 { VLV_GPIO_NC_9_PANEL1_VDDEN },
84 { VLV_GPIO_NC_10_PANEL1_BKLTEN },
85 { VLV_GPIO_NC_11_PANEL1_BKLTCTL },
88 #define CHV_GPIO_IDX_START_N 0
89 #define CHV_GPIO_IDX_START_E 73
90 #define CHV_GPIO_IDX_START_SW 100
91 #define CHV_GPIO_IDX_START_SE 198
93 #define CHV_VBT_MAX_PINS_PER_FMLY 15
95 #define CHV_GPIO_PAD_CFG0(f, i) (0x4400 + (f) * 0x400 + (i) * 8)
96 #define CHV_GPIO_GPIOEN (1 << 15)
97 #define CHV_GPIO_GPIOCFG_GPIO (0 << 8)
98 #define CHV_GPIO_GPIOCFG_GPO (1 << 8)
99 #define CHV_GPIO_GPIOCFG_GPI (2 << 8)
100 #define CHV_GPIO_GPIOCFG_HIZ (3 << 8)
101 #define CHV_GPIO_GPIOTXSTATE(state) ((!!(state)) << 1)
103 #define CHV_GPIO_PAD_CFG1(f, i) (0x4400 + (f) * 0x400 + (i) * 8 + 4)
104 #define CHV_GPIO_CFGLOCK (1 << 31)
106 static inline enum port intel_dsi_seq_port_to_port(u8 port)
108 return port ? PORT_C : PORT_A;
111 static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi,
114 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
115 struct mipi_dsi_device *dsi_device;
116 u8 type, flags, seq_port;
125 len = *((u16 *) data);
128 seq_port = (flags >> MIPI_PORT_SHIFT) & 3;
130 /* For DSI single link on Port A & C, the seq_port value which is
131 * parsed from Sequence Block#53 of VBT has been set to 0
132 * Now, read/write of packets for the DSI single link on Port A and
133 * Port C will based on the DVO port from VBT block 2.
135 if (intel_dsi->ports == (1 << PORT_C))
138 port = intel_dsi_seq_port_to_port(seq_port);
140 dsi_device = intel_dsi->dsi_hosts[port]->device;
142 DRM_DEBUG_KMS("no dsi device for port %c\n", port_name(port));
146 if ((flags >> MIPI_TRANSFER_MODE_SHIFT) & 1)
147 dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM;
149 dsi_device->mode_flags |= MIPI_DSI_MODE_LPM;
151 dsi_device->channel = (flags >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 3;
154 case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
155 mipi_dsi_generic_write(dsi_device, NULL, 0);
157 case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
158 mipi_dsi_generic_write(dsi_device, data, 1);
160 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
161 mipi_dsi_generic_write(dsi_device, data, 2);
163 case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
164 case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
165 case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
166 DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n");
168 case MIPI_DSI_GENERIC_LONG_WRITE:
169 mipi_dsi_generic_write(dsi_device, data, len);
171 case MIPI_DSI_DCS_SHORT_WRITE:
172 mipi_dsi_dcs_write_buffer(dsi_device, data, 1);
174 case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
175 mipi_dsi_dcs_write_buffer(dsi_device, data, 2);
177 case MIPI_DSI_DCS_READ:
178 DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
180 case MIPI_DSI_DCS_LONG_WRITE:
181 mipi_dsi_dcs_write_buffer(dsi_device, data, len);
185 if (!IS_ICELAKE(dev_priv))
186 vlv_dsi_wait_for_fifo_empty(intel_dsi, port);
194 static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data)
196 u32 delay = *((const u32 *) data);
200 usleep_range(delay, delay + 10);
206 static void vlv_exec_gpio(struct drm_i915_private *dev_priv,
207 u8 gpio_source, u8 gpio_index, bool value)
209 struct gpio_map *map;
214 if (gpio_index >= ARRAY_SIZE(vlv_gpio_table)) {
215 DRM_DEBUG_KMS("unknown gpio index %u\n", gpio_index);
219 map = &vlv_gpio_table[gpio_index];
221 if (dev_priv->vbt.dsi.seq_version >= 3) {
222 /* XXX: this assumes vlv_gpio_table only has NC GPIOs. */
223 port = IOSF_PORT_GPIO_NC;
225 if (gpio_source == 0) {
226 port = IOSF_PORT_GPIO_NC;
227 } else if (gpio_source == 1) {
228 DRM_DEBUG_KMS("SC gpio not supported\n");
231 DRM_DEBUG_KMS("unknown gpio source %u\n", gpio_source);
236 pconf0 = VLV_GPIO_PCONF0(map->base_offset);
237 padval = VLV_GPIO_PAD_VAL(map->base_offset);
239 mutex_lock(&dev_priv->sb_lock);
241 /* FIXME: remove constant below */
242 vlv_iosf_sb_write(dev_priv, port, pconf0, 0x2000CC00);
247 vlv_iosf_sb_write(dev_priv, port, padval, tmp);
248 mutex_unlock(&dev_priv->sb_lock);
251 static void chv_exec_gpio(struct drm_i915_private *dev_priv,
252 u8 gpio_source, u8 gpio_index, bool value)
258 if (dev_priv->vbt.dsi.seq_version >= 3) {
259 if (gpio_index >= CHV_GPIO_IDX_START_SE) {
260 /* XXX: it's unclear whether 255->57 is part of SE. */
261 gpio_index -= CHV_GPIO_IDX_START_SE;
262 port = CHV_IOSF_PORT_GPIO_SE;
263 } else if (gpio_index >= CHV_GPIO_IDX_START_SW) {
264 gpio_index -= CHV_GPIO_IDX_START_SW;
265 port = CHV_IOSF_PORT_GPIO_SW;
266 } else if (gpio_index >= CHV_GPIO_IDX_START_E) {
267 gpio_index -= CHV_GPIO_IDX_START_E;
268 port = CHV_IOSF_PORT_GPIO_E;
270 port = CHV_IOSF_PORT_GPIO_N;
273 /* XXX: The spec is unclear about CHV GPIO on seq v2 */
274 if (gpio_source != 0) {
275 DRM_DEBUG_KMS("unknown gpio source %u\n", gpio_source);
279 if (gpio_index >= CHV_GPIO_IDX_START_E) {
280 DRM_DEBUG_KMS("invalid gpio index %u for GPIO N\n",
285 port = CHV_IOSF_PORT_GPIO_N;
288 family_num = gpio_index / CHV_VBT_MAX_PINS_PER_FMLY;
289 gpio_index = gpio_index % CHV_VBT_MAX_PINS_PER_FMLY;
291 cfg0 = CHV_GPIO_PAD_CFG0(family_num, gpio_index);
292 cfg1 = CHV_GPIO_PAD_CFG1(family_num, gpio_index);
294 mutex_lock(&dev_priv->sb_lock);
295 vlv_iosf_sb_write(dev_priv, port, cfg1, 0);
296 vlv_iosf_sb_write(dev_priv, port, cfg0,
297 CHV_GPIO_GPIOEN | CHV_GPIO_GPIOCFG_GPO |
298 CHV_GPIO_GPIOTXSTATE(value));
299 mutex_unlock(&dev_priv->sb_lock);
302 static void bxt_exec_gpio(struct drm_i915_private *dev_priv,
303 u8 gpio_source, u8 gpio_index, bool value)
305 /* XXX: this table is a quick ugly hack. */
306 static struct gpio_desc *bxt_gpio_table[U8_MAX + 1];
307 struct gpio_desc *gpio_desc = bxt_gpio_table[gpio_index];
310 gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev,
312 value ? GPIOD_OUT_LOW :
315 if (IS_ERR_OR_NULL(gpio_desc)) {
316 DRM_ERROR("GPIO index %u request failed (%ld)\n",
317 gpio_index, PTR_ERR(gpio_desc));
321 bxt_gpio_table[gpio_index] = gpio_desc;
324 gpiod_set_value(gpio_desc, value);
327 static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
329 struct drm_device *dev = intel_dsi->base.base.dev;
330 struct drm_i915_private *dev_priv = to_i915(dev);
331 u8 gpio_source, gpio_index = 0, gpio_number;
336 if (dev_priv->vbt.dsi.seq_version >= 3)
337 gpio_index = *data++;
339 gpio_number = *data++;
341 /* gpio source in sequence v2 only */
342 if (dev_priv->vbt.dsi.seq_version == 2)
343 gpio_source = (*data >> 1) & 3;
350 if (IS_VALLEYVIEW(dev_priv))
351 vlv_exec_gpio(dev_priv, gpio_source, gpio_number, value);
352 else if (IS_CHERRYVIEW(dev_priv))
353 chv_exec_gpio(dev_priv, gpio_source, gpio_number, value);
355 bxt_exec_gpio(dev_priv, gpio_source, gpio_index, value);
360 static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data)
362 DRM_DEBUG_KMS("Skipping I2C element execution\n");
364 return data + *(data + 6) + 7;
367 static const u8 *mipi_exec_spi(struct intel_dsi *intel_dsi, const u8 *data)
369 DRM_DEBUG_KMS("Skipping SPI element execution\n");
371 return data + *(data + 5) + 6;
374 static const u8 *mipi_exec_pmic(struct intel_dsi *intel_dsi, const u8 *data)
376 DRM_DEBUG_KMS("Skipping PMIC element execution\n");
381 typedef const u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi,
383 static const fn_mipi_elem_exec exec_elem[] = {
384 [MIPI_SEQ_ELEM_SEND_PKT] = mipi_exec_send_packet,
385 [MIPI_SEQ_ELEM_DELAY] = mipi_exec_delay,
386 [MIPI_SEQ_ELEM_GPIO] = mipi_exec_gpio,
387 [MIPI_SEQ_ELEM_I2C] = mipi_exec_i2c,
388 [MIPI_SEQ_ELEM_SPI] = mipi_exec_spi,
389 [MIPI_SEQ_ELEM_PMIC] = mipi_exec_pmic,
393 * MIPI Sequence from VBT #53 parsing logic
394 * We have already separated each seqence during bios parsing
395 * Following is generic execution function for any sequence
398 static const char * const seq_name[] = {
399 [MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET",
400 [MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP",
401 [MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON",
402 [MIPI_SEQ_DISPLAY_OFF] = "MIPI_SEQ_DISPLAY_OFF",
403 [MIPI_SEQ_ASSERT_RESET] = "MIPI_SEQ_ASSERT_RESET",
404 [MIPI_SEQ_BACKLIGHT_ON] = "MIPI_SEQ_BACKLIGHT_ON",
405 [MIPI_SEQ_BACKLIGHT_OFF] = "MIPI_SEQ_BACKLIGHT_OFF",
406 [MIPI_SEQ_TEAR_ON] = "MIPI_SEQ_TEAR_ON",
407 [MIPI_SEQ_TEAR_OFF] = "MIPI_SEQ_TEAR_OFF",
408 [MIPI_SEQ_POWER_ON] = "MIPI_SEQ_POWER_ON",
409 [MIPI_SEQ_POWER_OFF] = "MIPI_SEQ_POWER_OFF",
412 static const char *sequence_name(enum mipi_seq seq_id)
414 if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id])
415 return seq_name[seq_id];
420 void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
421 enum mipi_seq seq_id)
423 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
425 fn_mipi_elem_exec mipi_elem_exec;
427 if (WARN_ON(seq_id >= ARRAY_SIZE(dev_priv->vbt.dsi.sequence)))
430 data = dev_priv->vbt.dsi.sequence[seq_id];
434 WARN_ON(*data != seq_id);
436 DRM_DEBUG_KMS("Starting MIPI sequence %d - %s\n",
437 seq_id, sequence_name(seq_id));
439 /* Skip Sequence Byte. */
442 /* Skip Size of Sequence. */
443 if (dev_priv->vbt.dsi.seq_version >= 3)
447 u8 operation_byte = *data++;
448 u8 operation_size = 0;
450 if (operation_byte == MIPI_SEQ_ELEM_END)
453 if (operation_byte < ARRAY_SIZE(exec_elem))
454 mipi_elem_exec = exec_elem[operation_byte];
456 mipi_elem_exec = NULL;
458 /* Size of Operation. */
459 if (dev_priv->vbt.dsi.seq_version >= 3)
460 operation_size = *data++;
462 if (mipi_elem_exec) {
463 const u8 *next = data + operation_size;
465 data = mipi_elem_exec(intel_dsi, data);
467 /* Consistency check if we have size. */
468 if (operation_size && data != next) {
469 DRM_ERROR("Inconsistent operation size\n");
472 } else if (operation_size) {
473 /* We have size, skip. */
474 DRM_DEBUG_KMS("Unsupported MIPI operation byte %u\n",
476 data += operation_size;
478 /* No size, can't skip without parsing. */
479 DRM_ERROR("Unsupported MIPI operation byte %u\n",
486 void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec)
488 struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
490 /* For v3 VBTs in vid-mode the delays are part of the VBT sequences */
491 if (is_vid_mode(intel_dsi) && dev_priv->vbt.dsi.seq_version >= 3)
497 int intel_dsi_vbt_get_modes(struct intel_dsi *intel_dsi)
499 struct intel_connector *connector = intel_dsi->attached_connector;
500 struct drm_device *dev = intel_dsi->base.base.dev;
501 struct drm_i915_private *dev_priv = to_i915(dev);
502 struct drm_display_mode *mode;
504 mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode);
508 mode->type |= DRM_MODE_TYPE_PREFERRED;
510 drm_mode_probed_add(&connector->base, mode);
515 #define ICL_PREPARE_CNT_MAX 0x7
516 #define ICL_CLK_ZERO_CNT_MAX 0xf
517 #define ICL_TRAIL_CNT_MAX 0x7
518 #define ICL_TCLK_PRE_CNT_MAX 0x3
519 #define ICL_TCLK_POST_CNT_MAX 0x7
520 #define ICL_HS_ZERO_CNT_MAX 0xf
521 #define ICL_EXIT_ZERO_CNT_MAX 0x7
523 static void icl_dphy_param_init(struct intel_dsi *intel_dsi)
525 struct drm_device *dev = intel_dsi->base.base.dev;
526 struct drm_i915_private *dev_priv = to_i915(dev);
527 struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
529 u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
530 u32 ths_prepare_ns, tclk_trail_ns;
532 u32 tclk_pre_cnt, tclk_post_cnt;
534 tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
536 tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
537 ths_prepare_ns = max(mipi_config->ths_prepare,
538 mipi_config->tclk_prepare);
541 * prepare cnt in escape clocks
542 * this field represents a hexadecimal value with a precision
543 * of 1.2 – i.e. the most significant bit is the integer
544 * and the least significant 2 bits are fraction bits.
545 * so, the field can represent a range of 0.25 to 1.75
547 prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * 4, tlpx_ns);
548 if (prepare_cnt > ICL_PREPARE_CNT_MAX) {
549 DRM_DEBUG_KMS("prepare_cnt out of range (%d)\n", prepare_cnt);
550 prepare_cnt = ICL_PREPARE_CNT_MAX;
553 /* clk zero count in escape clocks */
554 clk_zero_cnt = DIV_ROUND_UP(mipi_config->tclk_prepare_clkzero -
555 ths_prepare_ns, tlpx_ns);
556 if (clk_zero_cnt > ICL_CLK_ZERO_CNT_MAX) {
557 DRM_DEBUG_KMS("clk_zero_cnt out of range (%d)\n", clk_zero_cnt);
558 clk_zero_cnt = ICL_CLK_ZERO_CNT_MAX;
561 /* trail cnt in escape clocks*/
562 trail_cnt = DIV_ROUND_UP(tclk_trail_ns, tlpx_ns);
563 if (trail_cnt > ICL_TRAIL_CNT_MAX) {
564 DRM_DEBUG_KMS("trail_cnt out of range (%d)\n", trail_cnt);
565 trail_cnt = ICL_TRAIL_CNT_MAX;
568 /* tclk pre count in escape clocks */
569 tclk_pre_cnt = DIV_ROUND_UP(mipi_config->tclk_pre, tlpx_ns);
570 if (tclk_pre_cnt > ICL_TCLK_PRE_CNT_MAX) {
571 DRM_DEBUG_KMS("tclk_pre_cnt out of range (%d)\n", tclk_pre_cnt);
572 tclk_pre_cnt = ICL_TCLK_PRE_CNT_MAX;
575 /* tclk post count in escape clocks */
576 tclk_post_cnt = DIV_ROUND_UP(mipi_config->tclk_post, tlpx_ns);
577 if (tclk_post_cnt > ICL_TCLK_POST_CNT_MAX) {
578 DRM_DEBUG_KMS("tclk_post_cnt out of range (%d)\n", tclk_post_cnt);
579 tclk_post_cnt = ICL_TCLK_POST_CNT_MAX;
582 /* hs zero cnt in escape clocks */
583 hs_zero_cnt = DIV_ROUND_UP(mipi_config->ths_prepare_hszero -
584 ths_prepare_ns, tlpx_ns);
585 if (hs_zero_cnt > ICL_HS_ZERO_CNT_MAX) {
586 DRM_DEBUG_KMS("hs_zero_cnt out of range (%d)\n", hs_zero_cnt);
587 hs_zero_cnt = ICL_HS_ZERO_CNT_MAX;
590 /* hs exit zero cnt in escape clocks */
591 exit_zero_cnt = DIV_ROUND_UP(mipi_config->ths_exit, tlpx_ns);
592 if (exit_zero_cnt > ICL_EXIT_ZERO_CNT_MAX) {
593 DRM_DEBUG_KMS("exit_zero_cnt out of range (%d)\n", exit_zero_cnt);
594 exit_zero_cnt = ICL_EXIT_ZERO_CNT_MAX;
597 /* clock lane dphy timings */
598 intel_dsi->dphy_reg = (CLK_PREPARE_OVERRIDE |
599 CLK_PREPARE(prepare_cnt) |
601 CLK_ZERO(clk_zero_cnt) |
603 CLK_PRE(tclk_pre_cnt) |
605 CLK_POST(tclk_post_cnt) |
607 CLK_TRAIL(trail_cnt));
609 /* data lanes dphy timings */
610 intel_dsi->dphy_data_lane_reg = (HS_PREPARE_OVERRIDE |
611 HS_PREPARE(prepare_cnt) |
613 HS_ZERO(hs_zero_cnt) |
615 HS_TRAIL(trail_cnt) |
617 HS_EXIT(exit_zero_cnt));
620 static void vlv_dphy_param_init(struct intel_dsi *intel_dsi)
622 struct drm_device *dev = intel_dsi->base.base.dev;
623 struct drm_i915_private *dev_priv = to_i915(dev);
624 struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
625 u32 tlpx_ns, extra_byte_count, tlpx_ui;
627 u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
628 u32 ths_prepare_ns, tclk_trail_ns;
629 u32 tclk_prepare_clkzero, ths_prepare_hszero;
630 u32 lp_to_hs_switch, hs_to_lp_switch;
633 tlpx_ns = intel_dsi_tlpx_ns(intel_dsi);
635 switch (intel_dsi->lane_count) {
638 extra_byte_count = 2;
641 extra_byte_count = 4;
645 extra_byte_count = 3;
650 ui_num = NS_KHZ_RATIO;
651 ui_den = intel_dsi_bitrate(intel_dsi);
653 tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
654 ths_prepare_hszero = mipi_config->ths_prepare_hszero;
658 * LP byte clock = TLPX/ (8UI)
660 intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
662 /* DDR clock period = 2 * UI
663 * UI(sec) = 1/(bitrate * 10^3) (bitrate is in KHZ)
664 * UI(nsec) = 10^6 / bitrate
665 * DDR clock period (nsec) = 2 * UI = (2 * 10^6)/ bitrate
666 * DDR clock count = ns_value / DDR clock period
668 * For GEMINILAKE dphy_param_reg will be programmed in terms of
669 * HS byte clock count for other platform in HS ddr clock count
671 mul = IS_GEMINILAKE(dev_priv) ? 8 : 2;
672 ths_prepare_ns = max(mipi_config->ths_prepare,
673 mipi_config->tclk_prepare);
676 prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * mul);
678 if (prepare_cnt > PREPARE_CNT_MAX) {
679 DRM_DEBUG_KMS("prepare count too high %u\n", prepare_cnt);
680 prepare_cnt = PREPARE_CNT_MAX;
683 /* exit zero count */
684 exit_zero_cnt = DIV_ROUND_UP(
685 (ths_prepare_hszero - ths_prepare_ns) * ui_den,
690 * Exit zero is unified val ths_zero and ths_exit
691 * minimum value for ths_exit = 110ns
692 * min (exit_zero_cnt * 2) = 110/UI
693 * exit_zero_cnt = 55/UI
695 if (exit_zero_cnt < (55 * ui_den / ui_num) && (55 * ui_den) % ui_num)
698 if (exit_zero_cnt > EXIT_ZERO_CNT_MAX) {
699 DRM_DEBUG_KMS("exit zero count too high %u\n", exit_zero_cnt);
700 exit_zero_cnt = EXIT_ZERO_CNT_MAX;
704 clk_zero_cnt = DIV_ROUND_UP(
705 (tclk_prepare_clkzero - ths_prepare_ns)
706 * ui_den, ui_num * mul);
708 if (clk_zero_cnt > CLK_ZERO_CNT_MAX) {
709 DRM_DEBUG_KMS("clock zero count too high %u\n", clk_zero_cnt);
710 clk_zero_cnt = CLK_ZERO_CNT_MAX;
714 tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
715 trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, ui_num * mul);
717 if (trail_cnt > TRAIL_CNT_MAX) {
718 DRM_DEBUG_KMS("trail count too high %u\n", trail_cnt);
719 trail_cnt = TRAIL_CNT_MAX;
723 intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
724 clk_zero_cnt << 8 | prepare_cnt;
727 * LP to HS switch count = 4TLPX + PREP_COUNT * mul + EXIT_ZERO_COUNT *
728 * mul + 10UI + Extra Byte Count
730 * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
731 * Extra Byte Count is calculated according to number of lanes.
732 * High Low Switch Count is the Max of LP to HS and
733 * HS to LP switch count
736 tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
740 * The comment above does not match with the code */
741 lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * mul +
742 exit_zero_cnt * mul + 10, 8);
744 hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);
746 intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
747 intel_dsi->hs_to_lp_count += extra_byte_count;
750 /* LP -> HS for clock lanes
751 * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
753 * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
754 * 2(in UI) + extra byte count
755 * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
756 * 8 + extra byte count
758 intel_dsi->clk_lp_to_hs_count =
760 4 * tlpx_ui + prepare_cnt * 2 +
764 intel_dsi->clk_lp_to_hs_count += extra_byte_count;
766 /* HS->LP for Clock Lanes
767 * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
769 * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
770 * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
773 intel_dsi->clk_hs_to_lp_count =
774 DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
776 intel_dsi->clk_hs_to_lp_count += extra_byte_count;
779 bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
781 struct drm_device *dev = intel_dsi->base.base.dev;
782 struct drm_i915_private *dev_priv = to_i915(dev);
783 struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
784 struct mipi_pps_data *pps = dev_priv->vbt.dsi.pps;
785 struct drm_display_mode *mode = dev_priv->vbt.lfp_lvds_vbt_mode;
786 u16 burst_mode_ratio;
791 intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1;
792 intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0;
793 intel_dsi->lane_count = mipi_config->lane_cnt + 1;
794 intel_dsi->pixel_format =
795 pixel_format_from_register_bits(
796 mipi_config->videomode_color_format << 7);
798 intel_dsi->dual_link = mipi_config->dual_link;
799 intel_dsi->pixel_overlap = mipi_config->pixel_overlap;
800 intel_dsi->operation_mode = mipi_config->is_cmd_mode;
801 intel_dsi->video_mode_format = mipi_config->video_transfer_mode;
802 intel_dsi->escape_clk_div = mipi_config->byte_clk_sel;
803 intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout;
804 intel_dsi->hs_tx_timeout = mipi_config->hs_tx_timeout;
805 intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout;
806 intel_dsi->rst_timer_val = mipi_config->device_reset_timer;
807 intel_dsi->init_count = mipi_config->master_init_timer;
808 intel_dsi->bw_timer = mipi_config->dbi_bw_timer;
809 intel_dsi->video_frmt_cfg_bits =
810 mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0;
811 intel_dsi->bgr_enabled = mipi_config->rgb_flip;
813 /* Starting point, adjusted depending on dual link and burst mode */
814 intel_dsi->pclk = mode->clock;
816 /* In dual link mode each port needs half of pixel clock */
817 if (intel_dsi->dual_link) {
818 intel_dsi->pclk /= 2;
820 /* we can enable pixel_overlap if needed by panel. In this
821 * case we need to increase the pixelclock for extra pixels
823 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) {
824 intel_dsi->pclk += DIV_ROUND_UP(mode->vtotal * intel_dsi->pixel_overlap * 60, 1000);
829 * Target ddr frequency from VBT / non burst ddr freq
830 * multiply by 100 to preserve remainder
832 if (intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
833 if (mipi_config->target_burst_mode_freq) {
834 u32 bitrate = intel_dsi_bitrate(intel_dsi);
836 if (mipi_config->target_burst_mode_freq < bitrate) {
837 DRM_ERROR("Burst mode freq is less than computed\n");
841 burst_mode_ratio = DIV_ROUND_UP(
842 mipi_config->target_burst_mode_freq * 100,
845 intel_dsi->pclk = DIV_ROUND_UP(intel_dsi->pclk * burst_mode_ratio, 100);
847 DRM_ERROR("Burst mode target is not set\n");
851 burst_mode_ratio = 100;
853 intel_dsi->burst_mode_ratio = burst_mode_ratio;
855 if (IS_ICELAKE(dev_priv))
856 icl_dphy_param_init(intel_dsi);
858 vlv_dphy_param_init(intel_dsi);
860 DRM_DEBUG_KMS("Pclk %d\n", intel_dsi->pclk);
861 DRM_DEBUG_KMS("Pixel overlap %d\n", intel_dsi->pixel_overlap);
862 DRM_DEBUG_KMS("Lane count %d\n", intel_dsi->lane_count);
863 DRM_DEBUG_KMS("DPHY param reg 0x%x\n", intel_dsi->dphy_reg);
864 DRM_DEBUG_KMS("Video mode format %s\n",
865 intel_dsi->video_mode_format == VIDEO_MODE_NON_BURST_WITH_SYNC_PULSE ?
866 "non-burst with sync pulse" :
867 intel_dsi->video_mode_format == VIDEO_MODE_NON_BURST_WITH_SYNC_EVENTS ?
868 "non-burst with sync events" :
869 intel_dsi->video_mode_format == VIDEO_MODE_BURST ?
870 "burst" : "<unknown>");
871 DRM_DEBUG_KMS("Burst mode ratio %d\n", intel_dsi->burst_mode_ratio);
872 DRM_DEBUG_KMS("Reset timer %d\n", intel_dsi->rst_timer_val);
873 DRM_DEBUG_KMS("Eot %s\n", enableddisabled(intel_dsi->eotp_pkt));
874 DRM_DEBUG_KMS("Clockstop %s\n", enableddisabled(!intel_dsi->clock_stop));
875 DRM_DEBUG_KMS("Mode %s\n", intel_dsi->operation_mode ? "command" : "video");
876 if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK)
877 DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_FRONT_BACK\n");
878 else if (intel_dsi->dual_link == DSI_DUAL_LINK_PIXEL_ALT)
879 DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_PIXEL_ALT\n");
881 DRM_DEBUG_KMS("Dual link: NONE\n");
882 DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi->pixel_format);
883 DRM_DEBUG_KMS("TLPX %d\n", intel_dsi->escape_clk_div);
884 DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi->lp_rx_timeout);
885 DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi->turn_arnd_val);
886 DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi->init_count);
887 DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi->hs_to_lp_count);
888 DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi->lp_byte_clk);
889 DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi->bw_timer);
890 DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi->clk_lp_to_hs_count);
891 DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi->clk_hs_to_lp_count);
892 DRM_DEBUG_KMS("BTA %s\n",
893 enableddisabled(!(intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA)));
895 /* delays in VBT are in unit of 100us, so need to convert
897 * Delay (100us) * 100 /1000 = Delay / 10 (ms) */
898 intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10;
899 intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10;
900 intel_dsi->panel_on_delay = pps->panel_on_delay / 10;
901 intel_dsi->panel_off_delay = pps->panel_off_delay / 10;
902 intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10;
904 /* a regular driver would get the device in probe */
905 for_each_dsi_port(port, intel_dsi->ports) {
906 mipi_dsi_attach(intel_dsi->dsi_hosts[port]->device);