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 <drm/drm_panel.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"
41 struct drm_panel panel
;
42 struct intel_dsi
*intel_dsi
;
45 static inline struct vbt_panel
*to_vbt_panel(struct drm_panel
*panel
)
47 return container_of(panel
, struct vbt_panel
, panel
);
50 #define MIPI_TRANSFER_MODE_SHIFT 0
51 #define MIPI_VIRTUAL_CHANNEL_SHIFT 1
52 #define MIPI_PORT_SHIFT 3
54 #define PREPARE_CNT_MAX 0x3F
55 #define EXIT_ZERO_CNT_MAX 0x3F
56 #define CLK_ZERO_CNT_MAX 0xFF
57 #define TRAIL_CNT_MAX 0x1F
59 #define NS_KHZ_RATIO 1000000
61 #define GPI0_NC_0_HV_DDI0_HPD 0x4130
62 #define GPIO_NC_0_HV_DDI0_PAD 0x4138
63 #define GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120
64 #define GPIO_NC_1_HV_DDI0_DDC_SDA_PAD 0x4128
65 #define GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110
66 #define GPIO_NC_2_HV_DDI0_DDC_SCL_PAD 0x4118
67 #define GPIO_NC_3_PANEL0_VDDEN 0x4140
68 #define GPIO_NC_3_PANEL0_VDDEN_PAD 0x4148
69 #define GPIO_NC_4_PANEL0_BLKEN 0x4150
70 #define GPIO_NC_4_PANEL0_BLKEN_PAD 0x4158
71 #define GPIO_NC_5_PANEL0_BLKCTL 0x4160
72 #define GPIO_NC_5_PANEL0_BLKCTL_PAD 0x4168
73 #define GPIO_NC_6_PCONF0 0x4180
74 #define GPIO_NC_6_PAD 0x4188
75 #define GPIO_NC_7_PCONF0 0x4190
76 #define GPIO_NC_7_PAD 0x4198
77 #define GPIO_NC_8_PCONF0 0x4170
78 #define GPIO_NC_8_PAD 0x4178
79 #define GPIO_NC_9_PCONF0 0x4100
80 #define GPIO_NC_9_PAD 0x4108
81 #define GPIO_NC_10_PCONF0 0x40E0
82 #define GPIO_NC_10_PAD 0x40E8
83 #define GPIO_NC_11_PCONF0 0x40F0
84 #define GPIO_NC_11_PAD 0x40F8
92 static struct gpio_table gtable
[] = {
93 { GPI0_NC_0_HV_DDI0_HPD
, GPIO_NC_0_HV_DDI0_PAD
, 0 },
94 { GPIO_NC_1_HV_DDI0_DDC_SDA
, GPIO_NC_1_HV_DDI0_DDC_SDA_PAD
, 0 },
95 { GPIO_NC_2_HV_DDI0_DDC_SCL
, GPIO_NC_2_HV_DDI0_DDC_SCL_PAD
, 0 },
96 { GPIO_NC_3_PANEL0_VDDEN
, GPIO_NC_3_PANEL0_VDDEN_PAD
, 0 },
97 { GPIO_NC_4_PANEL0_BLKEN
, GPIO_NC_4_PANEL0_BLKEN_PAD
, 0 },
98 { GPIO_NC_5_PANEL0_BLKCTL
, GPIO_NC_5_PANEL0_BLKCTL_PAD
, 0 },
99 { GPIO_NC_6_PCONF0
, GPIO_NC_6_PAD
, 0 },
100 { GPIO_NC_7_PCONF0
, GPIO_NC_7_PAD
, 0 },
101 { GPIO_NC_8_PCONF0
, GPIO_NC_8_PAD
, 0 },
102 { GPIO_NC_9_PCONF0
, GPIO_NC_9_PAD
, 0 },
103 { GPIO_NC_10_PCONF0
, GPIO_NC_10_PAD
, 0},
104 { GPIO_NC_11_PCONF0
, GPIO_NC_11_PAD
, 0}
107 static inline enum port
intel_dsi_seq_port_to_port(u8 port
)
109 return port
? PORT_C
: PORT_A
;
112 static const u8
*mipi_exec_send_packet(struct intel_dsi
*intel_dsi
,
115 struct mipi_dsi_device
*dsi_device
;
116 u8 type
, flags
, seq_port
;
123 len
= *((u16
*) data
);
126 seq_port
= (flags
>> MIPI_PORT_SHIFT
) & 3;
128 /* For DSI single link on Port A & C, the seq_port value which is
129 * parsed from Sequence Block#53 of VBT has been set to 0
130 * Now, read/write of packets for the DSI single link on Port A and
131 * Port C will based on the DVO port from VBT block 2.
133 if (intel_dsi
->ports
== (1 << PORT_C
))
136 port
= intel_dsi_seq_port_to_port(seq_port
);
138 dsi_device
= intel_dsi
->dsi_hosts
[port
]->device
;
140 DRM_DEBUG_KMS("no dsi device for port %c\n", port_name(port
));
144 if ((flags
>> MIPI_TRANSFER_MODE_SHIFT
) & 1)
145 dsi_device
->mode_flags
&= ~MIPI_DSI_MODE_LPM
;
147 dsi_device
->mode_flags
|= MIPI_DSI_MODE_LPM
;
149 dsi_device
->channel
= (flags
>> MIPI_VIRTUAL_CHANNEL_SHIFT
) & 3;
152 case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM
:
153 mipi_dsi_generic_write(dsi_device
, NULL
, 0);
155 case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM
:
156 mipi_dsi_generic_write(dsi_device
, data
, 1);
158 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM
:
159 mipi_dsi_generic_write(dsi_device
, data
, 2);
161 case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM
:
162 case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM
:
163 case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM
:
164 DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n");
166 case MIPI_DSI_GENERIC_LONG_WRITE
:
167 mipi_dsi_generic_write(dsi_device
, data
, len
);
169 case MIPI_DSI_DCS_SHORT_WRITE
:
170 mipi_dsi_dcs_write_buffer(dsi_device
, data
, 1);
172 case MIPI_DSI_DCS_SHORT_WRITE_PARAM
:
173 mipi_dsi_dcs_write_buffer(dsi_device
, data
, 2);
175 case MIPI_DSI_DCS_READ
:
176 DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n");
178 case MIPI_DSI_DCS_LONG_WRITE
:
179 mipi_dsi_dcs_write_buffer(dsi_device
, data
, len
);
189 static const u8
*mipi_exec_delay(struct intel_dsi
*intel_dsi
, const u8
*data
)
191 u32 delay
= *((const u32
*) data
);
193 usleep_range(delay
, delay
+ 10);
199 static const u8
*mipi_exec_gpio(struct intel_dsi
*intel_dsi
, const u8
*data
)
201 u8 gpio_index
, action
;
204 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
205 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
207 if (dev_priv
->vbt
.dsi
.seq_version
>= 3)
210 gpio_index
= *data
++;
213 action
= *data
++ & 1;
215 if (gpio_index
>= ARRAY_SIZE(gtable
)) {
216 DRM_DEBUG_KMS("unknown gpio index %u\n", gpio_index
);
220 if (!IS_VALLEYVIEW(dev_priv
)) {
221 DRM_DEBUG_KMS("GPIO element not supported on this platform\n");
225 if (dev_priv
->vbt
.dsi
.seq_version
>= 3) {
226 DRM_DEBUG_KMS("GPIO element v3 not supported\n");
230 function
= gtable
[gpio_index
].function_reg
;
231 pad
= gtable
[gpio_index
].pad_reg
;
233 mutex_lock(&dev_priv
->sb_lock
);
234 if (!gtable
[gpio_index
].init
) {
235 /* program the function */
236 /* FIXME: remove constant below */
237 vlv_iosf_sb_write(dev_priv
, IOSF_PORT_GPIO_NC
, function
,
239 gtable
[gpio_index
].init
= 1;
245 vlv_iosf_sb_write(dev_priv
, IOSF_PORT_GPIO_NC
, pad
, val
);
246 mutex_unlock(&dev_priv
->sb_lock
);
252 static const u8
*mipi_exec_i2c_skip(struct intel_dsi
*intel_dsi
, const u8
*data
)
254 return data
+ *(data
+ 6) + 7;
257 typedef const u8
* (*fn_mipi_elem_exec
)(struct intel_dsi
*intel_dsi
,
259 static const fn_mipi_elem_exec exec_elem
[] = {
260 [MIPI_SEQ_ELEM_SEND_PKT
] = mipi_exec_send_packet
,
261 [MIPI_SEQ_ELEM_DELAY
] = mipi_exec_delay
,
262 [MIPI_SEQ_ELEM_GPIO
] = mipi_exec_gpio
,
263 [MIPI_SEQ_ELEM_I2C
] = mipi_exec_i2c_skip
,
267 * MIPI Sequence from VBT #53 parsing logic
268 * We have already separated each seqence during bios parsing
269 * Following is generic execution function for any sequence
272 static const char * const seq_name
[] = {
273 [MIPI_SEQ_ASSERT_RESET
] = "MIPI_SEQ_ASSERT_RESET",
274 [MIPI_SEQ_INIT_OTP
] = "MIPI_SEQ_INIT_OTP",
275 [MIPI_SEQ_DISPLAY_ON
] = "MIPI_SEQ_DISPLAY_ON",
276 [MIPI_SEQ_DISPLAY_OFF
] = "MIPI_SEQ_DISPLAY_OFF",
277 [MIPI_SEQ_DEASSERT_RESET
] = "MIPI_SEQ_DEASSERT_RESET",
278 [MIPI_SEQ_BACKLIGHT_ON
] = "MIPI_SEQ_BACKLIGHT_ON",
279 [MIPI_SEQ_BACKLIGHT_OFF
] = "MIPI_SEQ_BACKLIGHT_OFF",
280 [MIPI_SEQ_TEAR_ON
] = "MIPI_SEQ_TEAR_ON",
281 [MIPI_SEQ_TEAR_OFF
] = "MIPI_SEQ_TEAR_OFF",
282 [MIPI_SEQ_POWER_ON
] = "MIPI_SEQ_POWER_ON",
283 [MIPI_SEQ_POWER_OFF
] = "MIPI_SEQ_POWER_OFF",
286 static const char *sequence_name(enum mipi_seq seq_id
)
288 if (seq_id
< ARRAY_SIZE(seq_name
) && seq_name
[seq_id
])
289 return seq_name
[seq_id
];
294 static void generic_exec_sequence(struct drm_panel
*panel
, enum mipi_seq seq_id
)
296 struct vbt_panel
*vbt_panel
= to_vbt_panel(panel
);
297 struct intel_dsi
*intel_dsi
= vbt_panel
->intel_dsi
;
298 struct drm_i915_private
*dev_priv
= to_i915(intel_dsi
->base
.base
.dev
);
300 fn_mipi_elem_exec mipi_elem_exec
;
302 if (WARN_ON(seq_id
>= ARRAY_SIZE(dev_priv
->vbt
.dsi
.sequence
)))
305 data
= dev_priv
->vbt
.dsi
.sequence
[seq_id
];
307 DRM_DEBUG_KMS("MIPI sequence %d - %s not available\n",
308 seq_id
, sequence_name(seq_id
));
312 WARN_ON(*data
!= seq_id
);
314 DRM_DEBUG_KMS("Starting MIPI sequence %d - %s\n",
315 seq_id
, sequence_name(seq_id
));
317 /* Skip Sequence Byte. */
320 /* Skip Size of Sequence. */
321 if (dev_priv
->vbt
.dsi
.seq_version
>= 3)
325 u8 operation_byte
= *data
++;
326 u8 operation_size
= 0;
328 if (operation_byte
== MIPI_SEQ_ELEM_END
)
331 if (operation_byte
< ARRAY_SIZE(exec_elem
))
332 mipi_elem_exec
= exec_elem
[operation_byte
];
334 mipi_elem_exec
= NULL
;
336 /* Size of Operation. */
337 if (dev_priv
->vbt
.dsi
.seq_version
>= 3)
338 operation_size
= *data
++;
340 if (mipi_elem_exec
) {
341 data
= mipi_elem_exec(intel_dsi
, data
);
342 } else if (operation_size
) {
343 /* We have size, skip. */
344 DRM_DEBUG_KMS("Unsupported MIPI operation byte %u\n",
346 data
+= operation_size
;
348 /* No size, can't skip without parsing. */
349 DRM_ERROR("Unsupported MIPI operation byte %u\n",
356 static int vbt_panel_prepare(struct drm_panel
*panel
)
358 generic_exec_sequence(panel
, MIPI_SEQ_ASSERT_RESET
);
359 generic_exec_sequence(panel
, MIPI_SEQ_INIT_OTP
);
364 static int vbt_panel_unprepare(struct drm_panel
*panel
)
366 generic_exec_sequence(panel
, MIPI_SEQ_DEASSERT_RESET
);
371 static int vbt_panel_enable(struct drm_panel
*panel
)
373 generic_exec_sequence(panel
, MIPI_SEQ_DISPLAY_ON
);
378 static int vbt_panel_disable(struct drm_panel
*panel
)
380 generic_exec_sequence(panel
, MIPI_SEQ_DISPLAY_OFF
);
385 static int vbt_panel_get_modes(struct drm_panel
*panel
)
387 struct vbt_panel
*vbt_panel
= to_vbt_panel(panel
);
388 struct intel_dsi
*intel_dsi
= vbt_panel
->intel_dsi
;
389 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
390 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
391 struct drm_display_mode
*mode
;
393 if (!panel
->connector
)
396 mode
= drm_mode_duplicate(dev
, dev_priv
->vbt
.lfp_lvds_vbt_mode
);
400 mode
->type
|= DRM_MODE_TYPE_PREFERRED
;
402 drm_mode_probed_add(panel
->connector
, mode
);
407 static const struct drm_panel_funcs vbt_panel_funcs
= {
408 .disable
= vbt_panel_disable
,
409 .unprepare
= vbt_panel_unprepare
,
410 .prepare
= vbt_panel_prepare
,
411 .enable
= vbt_panel_enable
,
412 .get_modes
= vbt_panel_get_modes
,
415 /* XXX: This should be done when parsing the VBT in intel_bios.c */
416 static enum mipi_dsi_pixel_format
pixel_format_from_vbt(u32 fmt
)
418 /* It just so happens the VBT matches register contents. */
420 case VID_MODE_FORMAT_RGB888
:
421 return MIPI_DSI_FMT_RGB888
;
422 case VID_MODE_FORMAT_RGB666
:
423 return MIPI_DSI_FMT_RGB666
;
424 case VID_MODE_FORMAT_RGB666_PACKED
:
425 return MIPI_DSI_FMT_RGB666_PACKED
;
426 case VID_MODE_FORMAT_RGB565
:
427 return MIPI_DSI_FMT_RGB565
;
430 return MIPI_DSI_FMT_RGB666
;
434 struct drm_panel
*vbt_panel_init(struct intel_dsi
*intel_dsi
, u16 panel_id
)
436 struct drm_device
*dev
= intel_dsi
->base
.base
.dev
;
437 struct drm_i915_private
*dev_priv
= dev
->dev_private
;
438 struct mipi_config
*mipi_config
= dev_priv
->vbt
.dsi
.config
;
439 struct mipi_pps_data
*pps
= dev_priv
->vbt
.dsi
.pps
;
440 struct drm_display_mode
*mode
= dev_priv
->vbt
.lfp_lvds_vbt_mode
;
441 struct vbt_panel
*vbt_panel
;
443 u32 tlpx_ns
, extra_byte_count
, bitrate
, tlpx_ui
;
445 u32 prepare_cnt
, exit_zero_cnt
, clk_zero_cnt
, trail_cnt
;
446 u32 ths_prepare_ns
, tclk_trail_ns
;
447 u32 tclk_prepare_clkzero
, ths_prepare_hszero
;
448 u32 lp_to_hs_switch
, hs_to_lp_switch
;
449 u32 pclk
, computed_ddr
;
450 u16 burst_mode_ratio
;
455 intel_dsi
->eotp_pkt
= mipi_config
->eot_pkt_disabled
? 0 : 1;
456 intel_dsi
->clock_stop
= mipi_config
->enable_clk_stop
? 1 : 0;
457 intel_dsi
->lane_count
= mipi_config
->lane_cnt
+ 1;
458 intel_dsi
->pixel_format
= pixel_format_from_vbt(mipi_config
->videomode_color_format
<< 7);
459 bpp
= mipi_dsi_pixel_format_to_bpp(intel_dsi
->pixel_format
);
461 intel_dsi
->dual_link
= mipi_config
->dual_link
;
462 intel_dsi
->pixel_overlap
= mipi_config
->pixel_overlap
;
463 intel_dsi
->operation_mode
= mipi_config
->is_cmd_mode
;
464 intel_dsi
->video_mode_format
= mipi_config
->video_transfer_mode
;
465 intel_dsi
->escape_clk_div
= mipi_config
->byte_clk_sel
;
466 intel_dsi
->lp_rx_timeout
= mipi_config
->lp_rx_timeout
;
467 intel_dsi
->turn_arnd_val
= mipi_config
->turn_around_timeout
;
468 intel_dsi
->rst_timer_val
= mipi_config
->device_reset_timer
;
469 intel_dsi
->init_count
= mipi_config
->master_init_timer
;
470 intel_dsi
->bw_timer
= mipi_config
->dbi_bw_timer
;
471 intel_dsi
->video_frmt_cfg_bits
=
472 mipi_config
->bta_enabled
? DISABLE_VIDEO_BTA
: 0;
476 /* In dual link mode each port needs half of pixel clock */
477 if (intel_dsi
->dual_link
) {
480 /* we can enable pixel_overlap if needed by panel. In this
481 * case we need to increase the pixelclock for extra pixels
483 if (intel_dsi
->dual_link
== DSI_DUAL_LINK_FRONT_BACK
) {
484 pclk
+= DIV_ROUND_UP(mode
->vtotal
*
485 intel_dsi
->pixel_overlap
*
491 * Target ddr frequency from VBT / non burst ddr freq
492 * multiply by 100 to preserve remainder
494 if (intel_dsi
->video_mode_format
== VIDEO_MODE_BURST
) {
495 if (mipi_config
->target_burst_mode_freq
) {
496 computed_ddr
= (pclk
* bpp
) / intel_dsi
->lane_count
;
498 if (mipi_config
->target_burst_mode_freq
<
500 DRM_ERROR("Burst mode freq is less than computed\n");
504 burst_mode_ratio
= DIV_ROUND_UP(
505 mipi_config
->target_burst_mode_freq
* 100,
508 pclk
= DIV_ROUND_UP(pclk
* burst_mode_ratio
, 100);
510 DRM_ERROR("Burst mode target is not set\n");
514 burst_mode_ratio
= 100;
516 intel_dsi
->burst_mode_ratio
= burst_mode_ratio
;
517 intel_dsi
->pclk
= pclk
;
519 bitrate
= (pclk
* bpp
) / intel_dsi
->lane_count
;
521 switch (intel_dsi
->escape_clk_div
) {
537 switch (intel_dsi
->lane_count
) {
540 extra_byte_count
= 2;
543 extra_byte_count
= 4;
547 extra_byte_count
= 3;
552 * ui(s) = 1/f [f in hz]
553 * ui(ns) = 10^9 / (f*10^6) [f in Mhz] -> 10^3/f(Mhz)
557 ui_num
= NS_KHZ_RATIO
;
560 tclk_prepare_clkzero
= mipi_config
->tclk_prepare_clkzero
;
561 ths_prepare_hszero
= mipi_config
->ths_prepare_hszero
;
565 * LP byte clock = TLPX/ (8UI)
567 intel_dsi
->lp_byte_clk
= DIV_ROUND_UP(tlpx_ns
* ui_den
, 8 * ui_num
);
569 /* count values in UI = (ns value) * (bitrate / (2 * 10^6))
571 * Since txddrclkhs_i is 2xUI, all the count values programmed in
572 * DPHY param register are divided by 2
576 ths_prepare_ns
= max(mipi_config
->ths_prepare
,
577 mipi_config
->tclk_prepare
);
578 prepare_cnt
= DIV_ROUND_UP(ths_prepare_ns
* ui_den
, ui_num
* 2);
580 /* exit zero count */
581 exit_zero_cnt
= DIV_ROUND_UP(
582 (ths_prepare_hszero
- ths_prepare_ns
) * ui_den
,
587 * Exit zero is unified val ths_zero and ths_exit
588 * minimum value for ths_exit = 110ns
589 * min (exit_zero_cnt * 2) = 110/UI
590 * exit_zero_cnt = 55/UI
592 if (exit_zero_cnt
< (55 * ui_den
/ ui_num
))
593 if ((55 * ui_den
) % ui_num
)
597 clk_zero_cnt
= DIV_ROUND_UP(
598 (tclk_prepare_clkzero
- ths_prepare_ns
)
599 * ui_den
, 2 * ui_num
);
602 tclk_trail_ns
= max(mipi_config
->tclk_trail
, mipi_config
->ths_trail
);
603 trail_cnt
= DIV_ROUND_UP(tclk_trail_ns
* ui_den
, 2 * ui_num
);
605 if (prepare_cnt
> PREPARE_CNT_MAX
||
606 exit_zero_cnt
> EXIT_ZERO_CNT_MAX
||
607 clk_zero_cnt
> CLK_ZERO_CNT_MAX
||
608 trail_cnt
> TRAIL_CNT_MAX
)
609 DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n");
611 if (prepare_cnt
> PREPARE_CNT_MAX
)
612 prepare_cnt
= PREPARE_CNT_MAX
;
614 if (exit_zero_cnt
> EXIT_ZERO_CNT_MAX
)
615 exit_zero_cnt
= EXIT_ZERO_CNT_MAX
;
617 if (clk_zero_cnt
> CLK_ZERO_CNT_MAX
)
618 clk_zero_cnt
= CLK_ZERO_CNT_MAX
;
620 if (trail_cnt
> TRAIL_CNT_MAX
)
621 trail_cnt
= TRAIL_CNT_MAX
;
624 intel_dsi
->dphy_reg
= exit_zero_cnt
<< 24 | trail_cnt
<< 16 |
625 clk_zero_cnt
<< 8 | prepare_cnt
;
628 * LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2
629 * + 10UI + Extra Byte Count
631 * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count
632 * Extra Byte Count is calculated according to number of lanes.
633 * High Low Switch Count is the Max of LP to HS and
634 * HS to LP switch count
637 tlpx_ui
= DIV_ROUND_UP(tlpx_ns
* ui_den
, ui_num
);
641 * The comment above does not match with the code */
642 lp_to_hs_switch
= DIV_ROUND_UP(4 * tlpx_ui
+ prepare_cnt
* 2 +
643 exit_zero_cnt
* 2 + 10, 8);
645 hs_to_lp_switch
= DIV_ROUND_UP(mipi_config
->ths_trail
+ 2 * tlpx_ui
, 8);
647 intel_dsi
->hs_to_lp_count
= max(lp_to_hs_switch
, hs_to_lp_switch
);
648 intel_dsi
->hs_to_lp_count
+= extra_byte_count
;
651 /* LP -> HS for clock lanes
652 * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero +
654 * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt *
655 * 2(in UI) + extra byte count
656 * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) /
657 * 8 + extra byte count
659 intel_dsi
->clk_lp_to_hs_count
=
661 4 * tlpx_ui
+ prepare_cnt
* 2 +
665 intel_dsi
->clk_lp_to_hs_count
+= extra_byte_count
;
667 /* HS->LP for Clock Lanes
668 * Low Power clock synchronisations + 1Tx byteclk + tclk_trail +
670 * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count
671 * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 +
674 intel_dsi
->clk_hs_to_lp_count
=
675 DIV_ROUND_UP(2 * tlpx_ui
+ trail_cnt
* 2 + 8,
677 intel_dsi
->clk_hs_to_lp_count
+= extra_byte_count
;
679 DRM_DEBUG_KMS("Eot %s\n", intel_dsi
->eotp_pkt
? "enabled" : "disabled");
680 DRM_DEBUG_KMS("Clockstop %s\n", intel_dsi
->clock_stop
?
681 "disabled" : "enabled");
682 DRM_DEBUG_KMS("Mode %s\n", intel_dsi
->operation_mode
? "command" : "video");
683 if (intel_dsi
->dual_link
== DSI_DUAL_LINK_FRONT_BACK
)
684 DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_FRONT_BACK\n");
685 else if (intel_dsi
->dual_link
== DSI_DUAL_LINK_PIXEL_ALT
)
686 DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_PIXEL_ALT\n");
688 DRM_DEBUG_KMS("Dual link: NONE\n");
689 DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi
->pixel_format
);
690 DRM_DEBUG_KMS("TLPX %d\n", intel_dsi
->escape_clk_div
);
691 DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi
->lp_rx_timeout
);
692 DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi
->turn_arnd_val
);
693 DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi
->init_count
);
694 DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi
->hs_to_lp_count
);
695 DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi
->lp_byte_clk
);
696 DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi
->bw_timer
);
697 DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi
->clk_lp_to_hs_count
);
698 DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi
->clk_hs_to_lp_count
);
699 DRM_DEBUG_KMS("BTA %s\n",
700 intel_dsi
->video_frmt_cfg_bits
& DISABLE_VIDEO_BTA
?
701 "disabled" : "enabled");
703 /* delays in VBT are in unit of 100us, so need to convert
705 * Delay (100us) * 100 /1000 = Delay / 10 (ms) */
706 intel_dsi
->backlight_off_delay
= pps
->bl_disable_delay
/ 10;
707 intel_dsi
->backlight_on_delay
= pps
->bl_enable_delay
/ 10;
708 intel_dsi
->panel_on_delay
= pps
->panel_on_delay
/ 10;
709 intel_dsi
->panel_off_delay
= pps
->panel_off_delay
/ 10;
710 intel_dsi
->panel_pwr_cycle_delay
= pps
->panel_power_cycle_delay
/ 10;
712 /* This is cheating a bit with the cleanup. */
713 vbt_panel
= devm_kzalloc(dev
->dev
, sizeof(*vbt_panel
), GFP_KERNEL
);
717 vbt_panel
->intel_dsi
= intel_dsi
;
718 drm_panel_init(&vbt_panel
->panel
);
719 vbt_panel
->panel
.funcs
= &vbt_panel_funcs
;
720 drm_panel_add(&vbt_panel
->panel
);
722 /* a regular driver would get the device in probe */
723 for_each_dsi_port(port
, intel_dsi
->ports
) {
724 mipi_dsi_attach(intel_dsi
->dsi_hosts
[port
]->device
);
727 return &vbt_panel
->panel
;