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.
23 * Author: Shobhit Kumar <shobhit.kumar@intel.com>
28 #include <drm/drm_crtc.h>
29 #include <drm/drm_edid.h>
30 #include <drm/i915_drm.h>
31 #include <linux/slab.h>
32 #include <video/mipi_display.h>
33 #include <video/mipi_display.h>
35 #include "intel_drv.h"
36 #include "intel_dsi.h"
37 #include "intel_dsi_cmd.h"
39 #define MIPI_TRANSFER_MODE_SHIFT 0
40 #define MIPI_VIRTUAL_CHANNEL_SHIFT 1
41 #define MIPI_PORT_SHIFT 3
43 #define PREPARE_CNT_MAX 0x3F
44 #define EXIT_ZERO_CNT_MAX 0x3F
45 #define CLK_ZERO_CNT_MAX 0xFF
46 #define TRAIL_CNT_MAX 0x1F
48 #define NS_KHZ_RATIO 1000000
50 #define GPI0_NC_0_HV_DDI0_HPD 0x4130
51 #define GPIO_NC_0_HV_DDI0_PAD 0x4138
52 #define GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120
53 #define GPIO_NC_1_HV_DDI0_DDC_SDA_PAD 0x4128
54 #define GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110
55 #define GPIO_NC_2_HV_DDI0_DDC_SCL_PAD 0x4118
56 #define GPIO_NC_3_PANEL0_VDDEN 0x4140
57 #define GPIO_NC_3_PANEL0_VDDEN_PAD 0x4148
58 #define GPIO_NC_4_PANEL0_BLKEN 0x4150
59 #define GPIO_NC_4_PANEL0_BLKEN_PAD 0x4158
60 #define GPIO_NC_5_PANEL0_BLKCTL 0x4160
61 #define GPIO_NC_5_PANEL0_BLKCTL_PAD 0x4168
62 #define GPIO_NC_6_PCONF0 0x4180
63 #define GPIO_NC_6_PAD 0x4188
64 #define GPIO_NC_7_PCONF0 0x4190
65 #define GPIO_NC_7_PAD 0x4198
66 #define GPIO_NC_8_PCONF0 0x4170
67 #define GPIO_NC_8_PAD 0x4178
68 #define GPIO_NC_9_PCONF0 0x4100
69 #define GPIO_NC_9_PAD 0x4108
70 #define GPIO_NC_10_PCONF0 0x40E0
71 #define GPIO_NC_10_PAD 0x40E8
72 #define GPIO_NC_11_PCONF0 0x40F0
73 #define GPIO_NC_11_PAD 0x40F8
81 static struct gpio_table gtable[] = {
82 { GPI0_NC_0_HV_DDI0_HPD, GPIO_NC_0_HV_DDI0_PAD, 0 },
83 { GPIO_NC_1_HV_DDI0_DDC_SDA, GPIO_NC_1_HV_DDI0_DDC_SDA_PAD, 0 },
84 { GPIO_NC_2_HV_DDI0_DDC_SCL, GPIO_NC_2_HV_DDI0_DDC_SCL_PAD, 0 },
85 { GPIO_NC_3_PANEL0_VDDEN, GPIO_NC_3_PANEL0_VDDEN_PAD, 0 },
86 { GPIO_NC_4_PANEL0_BLKEN, GPIO_NC_4_PANEL0_BLKEN_PAD, 0 },
87 { GPIO_NC_5_PANEL0_BLKCTL, GPIO_NC_5_PANEL0_BLKCTL_PAD, 0 },
88 { GPIO_NC_6_PCONF0, GPIO_NC_6_PAD, 0 },
89 { GPIO_NC_7_PCONF0, GPIO_NC_7_PAD, 0 },
90 { GPIO_NC_8_PCONF0, GPIO_NC_8_PAD, 0 },
91 { GPIO_NC_9_PCONF0, GPIO_NC_9_PAD, 0 },
92 { GPIO_NC_10_PCONF0, GPIO_NC_10_PAD, 0},
93 { GPIO_NC_11_PCONF0, GPIO_NC_11_PAD, 0}
96 static u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi, u8 *data)
98 u8 type, byte, mode, vc, port;
102 mode = (byte >> MIPI_TRANSFER_MODE_SHIFT) & 0x1;
103 vc = (byte >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 0x3;
104 port = (byte >> MIPI_PORT_SHIFT) & 0x3;
107 intel_dsi->hs = mode;
109 /* get packet type and increment the pointer */
112 len = *((u16 *) data);
116 case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
117 dsi_vc_generic_write_0(intel_dsi, vc);
119 case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
120 dsi_vc_generic_write_1(intel_dsi, vc, *data);
122 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
123 dsi_vc_generic_write_2(intel_dsi, vc, *data, *(data + 1));
125 case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
126 case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
127 case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
128 DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n");
130 case MIPI_DSI_GENERIC_LONG_WRITE:
131 dsi_vc_generic_write(intel_dsi, vc, data, len);
133 case MIPI_DSI_DCS_SHORT_WRITE:
134 dsi_vc_dcs_write_0(intel_dsi, vc, *data);
136 case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
137 dsi_vc_dcs_write_1(intel_dsi, vc, *data, *(data + 1));
139 case MIPI_DSI_DCS_READ:
140 DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
142 case MIPI_DSI_DCS_LONG_WRITE:
143 dsi_vc_dcs_write(intel_dsi, vc, data, len);
152 static u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, u8 *data)
154 u32 delay = *((u32 *) data);
156 usleep_range(delay, delay + 10);
162 static u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, u8 *data)
167 struct drm_device *dev = intel_dsi->base.base.dev;
168 struct drm_i915_private *dev_priv = dev->dev_private;
175 function = gtable[gpio].function_reg;
176 pad = gtable[gpio].pad_reg;
178 mutex_lock(&dev_priv->dpio_lock);
179 if (!gtable[gpio].init) {
180 /* program the function */
181 /* FIXME: remove constant below */
182 vlv_gpio_nc_write(dev_priv, function, 0x2000CC00);
183 gtable[gpio].init = 1;
189 vlv_gpio_nc_write(dev_priv, pad, val);
190 mutex_unlock(&dev_priv->dpio_lock);
195 typedef u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi, u8 *data);
196 static const fn_mipi_elem_exec exec_elem[] = {
198 mipi_exec_send_packet,
201 NULL, /* status read; later */
205 * MIPI Sequence from VBT #53 parsing logic
206 * We have already separated each seqence during bios parsing
207 * Following is generic execution function for any sequence
210 static const char * const seq_name[] = {
212 "MIPI_SEQ_ASSERT_RESET",
214 "MIPI_SEQ_DISPLAY_ON",
215 "MIPI_SEQ_DISPLAY_OFF",
216 "MIPI_SEQ_DEASSERT_RESET"
219 static void generic_exec_sequence(struct intel_dsi *intel_dsi, char *sequence)
222 fn_mipi_elem_exec mipi_elem_exec;
228 DRM_DEBUG_DRIVER("Starting MIPI sequence - %s\n", seq_name[*data]);
230 /* go to the first element of the sequence */
233 /* parse each byte till we reach end of sequence byte - 0x00 */
236 mipi_elem_exec = exec_elem[index];
237 if (!mipi_elem_exec) {
238 DRM_ERROR("Unsupported MIPI element, skipping sequence execution\n");
242 /* goto element payload */
245 /* execute the element specific rotines */
246 data = mipi_elem_exec(intel_dsi, data);
249 * After processing the element, data should point to
250 * next element or end of sequence
251 * check if have we reached end of sequence
258 static bool generic_init(struct intel_dsi_device *dsi)
260 struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
261 struct drm_device *dev = intel_dsi->base.base.dev;
262 struct drm_i915_private *dev_priv = dev->dev_private;
263 struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
264 struct mipi_pps_data *pps = dev_priv->vbt.dsi.pps;
265 struct drm_display_mode *mode = dev_priv->vbt.lfp_lvds_vbt_mode;
266 u32 bits_per_pixel = 24;
267 u32 tlpx_ns, extra_byte_count, bitrate, tlpx_ui;
269 u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt;
270 u32 ths_prepare_ns, tclk_trail_ns;
271 u32 tclk_prepare_clkzero, ths_prepare_hszero;
272 u32 lp_to_hs_switch, hs_to_lp_switch;
276 intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1;
277 intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0;
278 intel_dsi->lane_count = mipi_config->lane_cnt + 1;
279 intel_dsi->pixel_format = mipi_config->videomode_color_format << 7;
281 if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB666)
283 else if (intel_dsi->pixel_format == VID_MODE_FORMAT_RGB565)
286 bitrate = (mode->clock * bits_per_pixel) / intel_dsi->lane_count;
288 intel_dsi->operation_mode = mipi_config->is_cmd_mode;
289 intel_dsi->video_mode_format = mipi_config->video_transfer_mode;
290 intel_dsi->escape_clk_div = mipi_config->byte_clk_sel;
291 intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout;
292 intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout;
293 intel_dsi->rst_timer_val = mipi_config->device_reset_timer;
294 intel_dsi->init_count = mipi_config->master_init_timer;
295 intel_dsi->bw_timer = mipi_config->dbi_bw_timer;
296 intel_dsi->video_frmt_cfg_bits =
297 mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0;
299 switch (intel_dsi->escape_clk_div) {
315 switch (intel_dsi->lane_count) {
318 extra_byte_count = 2;
321 extra_byte_count = 4;
325 extra_byte_count = 3;
330 * ui(s) = 1/f [f in hz]
331 * ui(ns) = 10^9 / (f*10^6) [f in Mhz] -> 10^3/f(Mhz)
335 ui_num = NS_KHZ_RATIO;
338 tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero;
339 ths_prepare_hszero = mipi_config->ths_prepare_hszero;
343 * LP byte clock = TLPX/ (8UI)
345 intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num);
347 /* count values in UI = (ns value) * (bitrate / (2 * 10^6))
349 * Since txddrclkhs_i is 2xUI, all the count values programmed in
350 * DPHY param register are divided by 2
354 ths_prepare_ns = max(mipi_config->ths_prepare,
355 mipi_config->tclk_prepare);
356 prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * 2);
358 /* exit zero count */
359 exit_zero_cnt = DIV_ROUND_UP(
360 (ths_prepare_hszero - ths_prepare_ns) * ui_den,
365 * Exit zero is unified val ths_zero and ths_exit
366 * minimum value for ths_exit = 110ns
367 * min (exit_zero_cnt * 2) = 110/UI
368 * exit_zero_cnt = 55/UI
370 if (exit_zero_cnt < (55 * ui_den / ui_num))
371 if ((55 * ui_den) % ui_num)
375 clk_zero_cnt = DIV_ROUND_UP(
376 (tclk_prepare_clkzero - ths_prepare_ns)
377 * ui_den, 2 * ui_num);
380 tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
381 trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, 2 * ui_num);
383 if (prepare_cnt > PREPARE_CNT_MAX ||
384 exit_zero_cnt > EXIT_ZERO_CNT_MAX ||
385 clk_zero_cnt > CLK_ZERO_CNT_MAX ||
386 trail_cnt > TRAIL_CNT_MAX)
387 DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n");
389 if (prepare_cnt > PREPARE_CNT_MAX)
390 prepare_cnt = PREPARE_CNT_MAX;
392 if (exit_zero_cnt > EXIT_ZERO_CNT_MAX)
393 exit_zero_cnt = EXIT_ZERO_CNT_MAX;
395 if (clk_zero_cnt > CLK_ZERO_CNT_MAX)
396 clk_zero_cnt = CLK_ZERO_CNT_MAX;
398 if (trail_cnt > TRAIL_CNT_MAX)
399 trail_cnt = TRAIL_CNT_MAX;
402 intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
403 clk_zero_cnt << 8 | prepare_cnt;
406 * LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2
407 * + 10UI + Extra Byte Count
409 * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
410 * Extra Byte Count is calculated according to number of lanes.
411 * High Low Switch Count is the Max of LP to HS and
412 * HS to LP switch count
415 tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num);
419 * The comment above does not match with the code */
420 lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * 2 +
421 exit_zero_cnt * 2 + 10, 8);
423 hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8);
425 intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch);
426 intel_dsi->hs_to_lp_count += extra_byte_count;
429 /* LP -> HS for clock lanes
430 * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
432 * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
433 * 2(in UI) + extra byte count
434 * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
435 * 8 + extra byte count
437 intel_dsi->clk_lp_to_hs_count =
439 4 * tlpx_ui + prepare_cnt * 2 +
443 intel_dsi->clk_lp_to_hs_count += extra_byte_count;
445 /* HS->LP for Clock Lanes
446 * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
448 * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
449 * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
452 intel_dsi->clk_hs_to_lp_count =
453 DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8,
455 intel_dsi->clk_hs_to_lp_count += extra_byte_count;
457 DRM_DEBUG_KMS("Eot %s\n", intel_dsi->eotp_pkt ? "enabled" : "disabled");
458 DRM_DEBUG_KMS("Clockstop %s\n", intel_dsi->clock_stop ?
459 "disabled" : "enabled");
460 DRM_DEBUG_KMS("Mode %s\n", intel_dsi->operation_mode ? "command" : "video");
461 DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi->pixel_format);
462 DRM_DEBUG_KMS("TLPX %d\n", intel_dsi->escape_clk_div);
463 DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi->lp_rx_timeout);
464 DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi->turn_arnd_val);
465 DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi->init_count);
466 DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi->hs_to_lp_count);
467 DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi->lp_byte_clk);
468 DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi->bw_timer);
469 DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi->clk_lp_to_hs_count);
470 DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi->clk_hs_to_lp_count);
471 DRM_DEBUG_KMS("BTA %s\n",
472 intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA ?
473 "disabled" : "enabled");
475 /* delays in VBT are in unit of 100us, so need to convert
477 * Delay (100us) * 100 /1000 = Delay / 10 (ms) */
478 intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10;
479 intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10;
480 intel_dsi->panel_on_delay = pps->panel_on_delay / 10;
481 intel_dsi->panel_off_delay = pps->panel_off_delay / 10;
482 intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10;
487 static int generic_mode_valid(struct intel_dsi_device *dsi,
488 struct drm_display_mode *mode)
493 static bool generic_mode_fixup(struct intel_dsi_device *dsi,
494 const struct drm_display_mode *mode,
495 struct drm_display_mode *adjusted_mode) {
499 static void generic_panel_reset(struct intel_dsi_device *dsi)
501 struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
502 struct drm_device *dev = intel_dsi->base.base.dev;
503 struct drm_i915_private *dev_priv = dev->dev_private;
505 char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET];
507 generic_exec_sequence(intel_dsi, sequence);
510 static void generic_disable_panel_power(struct intel_dsi_device *dsi)
512 struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
513 struct drm_device *dev = intel_dsi->base.base.dev;
514 struct drm_i915_private *dev_priv = dev->dev_private;
516 char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET];
518 generic_exec_sequence(intel_dsi, sequence);
521 static void generic_send_otp_cmds(struct intel_dsi_device *dsi)
523 struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
524 struct drm_device *dev = intel_dsi->base.base.dev;
525 struct drm_i915_private *dev_priv = dev->dev_private;
527 char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
529 generic_exec_sequence(intel_dsi, sequence);
532 static void generic_enable(struct intel_dsi_device *dsi)
534 struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
535 struct drm_device *dev = intel_dsi->base.base.dev;
536 struct drm_i915_private *dev_priv = dev->dev_private;
538 char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_ON];
540 generic_exec_sequence(intel_dsi, sequence);
543 static void generic_disable(struct intel_dsi_device *dsi)
545 struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
546 struct drm_device *dev = intel_dsi->base.base.dev;
547 struct drm_i915_private *dev_priv = dev->dev_private;
549 char *sequence = dev_priv->vbt.dsi.sequence[MIPI_SEQ_DISPLAY_OFF];
551 generic_exec_sequence(intel_dsi, sequence);
554 static enum drm_connector_status generic_detect(struct intel_dsi_device *dsi)
556 return connector_status_connected;
559 static bool generic_get_hw_state(struct intel_dsi_device *dev)
564 static struct drm_display_mode *generic_get_modes(struct intel_dsi_device *dsi)
566 struct intel_dsi *intel_dsi = container_of(dsi, struct intel_dsi, dev);
567 struct drm_device *dev = intel_dsi->base.base.dev;
568 struct drm_i915_private *dev_priv = dev->dev_private;
570 dev_priv->vbt.lfp_lvds_vbt_mode->type |= DRM_MODE_TYPE_PREFERRED;
571 return dev_priv->vbt.lfp_lvds_vbt_mode;
574 static void generic_destroy(struct intel_dsi_device *dsi) { }
576 /* Callbacks. We might not need them all. */
577 struct intel_dsi_dev_ops vbt_generic_dsi_display_ops = {
578 .init = generic_init,
579 .mode_valid = generic_mode_valid,
580 .mode_fixup = generic_mode_fixup,
581 .panel_reset = generic_panel_reset,
582 .disable_panel_power = generic_disable_panel_power,
583 .send_otp_cmds = generic_send_otp_cmds,
584 .enable = generic_enable,
585 .disable = generic_disable,
586 .detect = generic_detect,
587 .get_hw_state = generic_get_hw_state,
588 .get_modes = generic_get_modes,
589 .destroy = generic_destroy,