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2ab8b458 SK |
1 | /* |
2 | * Copyright © 2014 Intel Corporation | |
3 | * | |
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: | |
10 | * | |
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 | |
13 | * Software. | |
14 | * | |
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. | |
22 | * | |
23 | * Author: Shobhit Kumar <shobhit.kumar@intel.com> | |
24 | * | |
25 | */ | |
26 | ||
27 | #include <drm/drmP.h> | |
28 | #include <drm/drm_crtc.h> | |
29 | #include <drm/drm_edid.h> | |
30 | #include <drm/i915_drm.h> | |
593e0622 | 31 | #include <drm/drm_panel.h> |
2ab8b458 SK |
32 | #include <linux/slab.h> |
33 | #include <video/mipi_display.h> | |
34 | #include <asm/intel-mid.h> | |
35 | #include <video/mipi_display.h> | |
36 | #include "i915_drv.h" | |
37 | #include "intel_drv.h" | |
38 | #include "intel_dsi.h" | |
2ab8b458 | 39 | |
593e0622 JN |
40 | struct vbt_panel { |
41 | struct drm_panel panel; | |
42 | struct intel_dsi *intel_dsi; | |
43 | }; | |
44 | ||
45 | static inline struct vbt_panel *to_vbt_panel(struct drm_panel *panel) | |
46 | { | |
47 | return container_of(panel, struct vbt_panel, panel); | |
48 | } | |
49 | ||
2ab8b458 SK |
50 | #define MIPI_TRANSFER_MODE_SHIFT 0 |
51 | #define MIPI_VIRTUAL_CHANNEL_SHIFT 1 | |
52 | #define MIPI_PORT_SHIFT 3 | |
53 | ||
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 | |
58 | ||
59 | #define NS_KHZ_RATIO 1000000 | |
60 | ||
b0c91cd0 JN |
61 | /* base offsets for gpio pads */ |
62 | #define VLV_GPIO_NC_0_HV_DDI0_HPD 0x4130 | |
63 | #define VLV_GPIO_NC_1_HV_DDI0_DDC_SDA 0x4120 | |
64 | #define VLV_GPIO_NC_2_HV_DDI0_DDC_SCL 0x4110 | |
65 | #define VLV_GPIO_NC_3_PANEL0_VDDEN 0x4140 | |
66 | #define VLV_GPIO_NC_4_PANEL0_BKLTEN 0x4150 | |
67 | #define VLV_GPIO_NC_5_PANEL0_BKLTCTL 0x4160 | |
68 | #define VLV_GPIO_NC_6_HV_DDI1_HPD 0x4180 | |
69 | #define VLV_GPIO_NC_7_HV_DDI1_DDC_SDA 0x4190 | |
70 | #define VLV_GPIO_NC_8_HV_DDI1_DDC_SCL 0x4170 | |
71 | #define VLV_GPIO_NC_9_PANEL1_VDDEN 0x4100 | |
72 | #define VLV_GPIO_NC_10_PANEL1_BKLTEN 0x40E0 | |
73 | #define VLV_GPIO_NC_11_PANEL1_BKLTCTL 0x40F0 | |
74 | ||
75 | #define VLV_GPIO_PCONF0(base_offset) (base_offset) | |
76 | #define VLV_GPIO_PAD_VAL(base_offset) ((base_offset) + 8) | |
2ab8b458 | 77 | |
b13d8e28 | 78 | struct gpio_map { |
b0c91cd0 JN |
79 | u16 base_offset; |
80 | bool init; | |
2ab8b458 SK |
81 | }; |
82 | ||
b13d8e28 | 83 | static struct gpio_map vlv_gpio_table[] = { |
b0c91cd0 JN |
84 | { VLV_GPIO_NC_0_HV_DDI0_HPD }, |
85 | { VLV_GPIO_NC_1_HV_DDI0_DDC_SDA }, | |
86 | { VLV_GPIO_NC_2_HV_DDI0_DDC_SCL }, | |
87 | { VLV_GPIO_NC_3_PANEL0_VDDEN }, | |
88 | { VLV_GPIO_NC_4_PANEL0_BKLTEN }, | |
89 | { VLV_GPIO_NC_5_PANEL0_BKLTCTL }, | |
90 | { VLV_GPIO_NC_6_HV_DDI1_HPD }, | |
91 | { VLV_GPIO_NC_7_HV_DDI1_DDC_SDA }, | |
92 | { VLV_GPIO_NC_8_HV_DDI1_DDC_SCL }, | |
93 | { VLV_GPIO_NC_9_PANEL1_VDDEN }, | |
94 | { VLV_GPIO_NC_10_PANEL1_BKLTEN }, | |
95 | { VLV_GPIO_NC_11_PANEL1_BKLTCTL }, | |
2ab8b458 SK |
96 | }; |
97 | ||
a0a6d4ff JN |
98 | #define CHV_GPIO_IDX_START_N 0 |
99 | #define CHV_GPIO_IDX_START_E 73 | |
100 | #define CHV_GPIO_IDX_START_SW 100 | |
101 | #define CHV_GPIO_IDX_START_SE 198 | |
102 | ||
103 | #define CHV_VBT_MAX_PINS_PER_FMLY 15 | |
104 | ||
105 | #define CHV_GPIO_PAD_CFG0(f, i) (0x4400 + (f) * 0x400 + (i) * 8) | |
106 | #define CHV_GPIO_GPIOEN (1 << 15) | |
107 | #define CHV_GPIO_GPIOCFG_GPIO (0 << 8) | |
108 | #define CHV_GPIO_GPIOCFG_GPO (1 << 8) | |
109 | #define CHV_GPIO_GPIOCFG_GPI (2 << 8) | |
110 | #define CHV_GPIO_GPIOCFG_HIZ (3 << 8) | |
111 | #define CHV_GPIO_GPIOTXSTATE(state) ((!!(state)) << 1) | |
112 | ||
113 | #define CHV_GPIO_PAD_CFG1(f, i) (0x4400 + (f) * 0x400 + (i) * 8 + 4) | |
114 | #define CHV_GPIO_CFGLOCK (1 << 31) | |
115 | ||
8f4d2683 GS |
116 | static inline enum port intel_dsi_seq_port_to_port(u8 port) |
117 | { | |
118 | return port ? PORT_C : PORT_A; | |
119 | } | |
120 | ||
5b48ca0f JN |
121 | static const u8 *mipi_exec_send_packet(struct intel_dsi *intel_dsi, |
122 | const u8 *data) | |
2ab8b458 | 123 | { |
759d10c2 JN |
124 | struct mipi_dsi_device *dsi_device; |
125 | u8 type, flags, seq_port; | |
2ab8b458 | 126 | u16 len; |
8f4d2683 | 127 | enum port port; |
2ab8b458 | 128 | |
759d10c2 JN |
129 | flags = *data++; |
130 | type = *data++; | |
131 | ||
132 | len = *((u16 *) data); | |
133 | data += 2; | |
134 | ||
135 | seq_port = (flags >> MIPI_PORT_SHIFT) & 3; | |
2ab8b458 | 136 | |
f915084e GS |
137 | /* For DSI single link on Port A & C, the seq_port value which is |
138 | * parsed from Sequence Block#53 of VBT has been set to 0 | |
139 | * Now, read/write of packets for the DSI single link on Port A and | |
140 | * Port C will based on the DVO port from VBT block 2. | |
141 | */ | |
142 | if (intel_dsi->ports == (1 << PORT_C)) | |
143 | port = PORT_C; | |
144 | else | |
145 | port = intel_dsi_seq_port_to_port(seq_port); | |
2ab8b458 | 146 | |
759d10c2 JN |
147 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
148 | if (!dsi_device) { | |
149 | DRM_DEBUG_KMS("no dsi device for port %c\n", port_name(port)); | |
150 | goto out; | |
151 | } | |
2ab8b458 | 152 | |
759d10c2 JN |
153 | if ((flags >> MIPI_TRANSFER_MODE_SHIFT) & 1) |
154 | dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM; | |
155 | else | |
156 | dsi_device->mode_flags |= MIPI_DSI_MODE_LPM; | |
157 | ||
158 | dsi_device->channel = (flags >> MIPI_VIRTUAL_CHANNEL_SHIFT) & 3; | |
2ab8b458 SK |
159 | |
160 | switch (type) { | |
161 | case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: | |
759d10c2 | 162 | mipi_dsi_generic_write(dsi_device, NULL, 0); |
2ab8b458 SK |
163 | break; |
164 | case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM: | |
759d10c2 | 165 | mipi_dsi_generic_write(dsi_device, data, 1); |
2ab8b458 SK |
166 | break; |
167 | case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM: | |
759d10c2 | 168 | mipi_dsi_generic_write(dsi_device, data, 2); |
2ab8b458 SK |
169 | break; |
170 | case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: | |
171 | case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: | |
172 | case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: | |
173 | DRM_DEBUG_DRIVER("Generic Read not yet implemented or used\n"); | |
174 | break; | |
175 | case MIPI_DSI_GENERIC_LONG_WRITE: | |
759d10c2 | 176 | mipi_dsi_generic_write(dsi_device, data, len); |
2ab8b458 SK |
177 | break; |
178 | case MIPI_DSI_DCS_SHORT_WRITE: | |
759d10c2 | 179 | mipi_dsi_dcs_write_buffer(dsi_device, data, 1); |
2ab8b458 SK |
180 | break; |
181 | case MIPI_DSI_DCS_SHORT_WRITE_PARAM: | |
759d10c2 | 182 | mipi_dsi_dcs_write_buffer(dsi_device, data, 2); |
2ab8b458 SK |
183 | break; |
184 | case MIPI_DSI_DCS_READ: | |
185 | DRM_DEBUG_DRIVER("DCS Read not yet implemented or used\n"); | |
186 | break; | |
187 | case MIPI_DSI_DCS_LONG_WRITE: | |
759d10c2 | 188 | mipi_dsi_dcs_write_buffer(dsi_device, data, len); |
2ab8b458 | 189 | break; |
b5fbcd98 | 190 | } |
2ab8b458 | 191 | |
759d10c2 | 192 | out: |
2ab8b458 SK |
193 | data += len; |
194 | ||
195 | return data; | |
196 | } | |
197 | ||
5b48ca0f | 198 | static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data) |
2ab8b458 | 199 | { |
5b48ca0f | 200 | u32 delay = *((const u32 *) data); |
2ab8b458 SK |
201 | |
202 | usleep_range(delay, delay + 10); | |
203 | data += 4; | |
204 | ||
205 | return data; | |
206 | } | |
207 | ||
515d07de JN |
208 | static void vlv_exec_gpio(struct drm_i915_private *dev_priv, |
209 | u8 gpio_source, u8 gpio_index, bool value) | |
2ab8b458 | 210 | { |
b13d8e28 | 211 | struct gpio_map *map; |
b0c91cd0 | 212 | u16 pconf0, padval; |
515d07de JN |
213 | u32 tmp; |
214 | u8 port; | |
2ab8b458 | 215 | |
b0c91cd0 | 216 | if (gpio_index >= ARRAY_SIZE(vlv_gpio_table)) { |
e37788fd | 217 | DRM_DEBUG_KMS("unknown gpio index %u\n", gpio_index); |
515d07de | 218 | return; |
96afef1d JN |
219 | } |
220 | ||
b13d8e28 JN |
221 | map = &vlv_gpio_table[gpio_index]; |
222 | ||
96afef1d | 223 | if (dev_priv->vbt.dsi.seq_version >= 3) { |
4b541efe JN |
224 | /* XXX: this assumes vlv_gpio_table only has NC GPIOs. */ |
225 | port = IOSF_PORT_GPIO_NC; | |
1d96a4a8 JN |
226 | } else { |
227 | if (gpio_source == 0) { | |
228 | port = IOSF_PORT_GPIO_NC; | |
229 | } else if (gpio_source == 1) { | |
060d4c33 JN |
230 | DRM_DEBUG_KMS("SC gpio not supported\n"); |
231 | return; | |
1d96a4a8 JN |
232 | } else { |
233 | DRM_DEBUG_KMS("unknown gpio source %u\n", gpio_source); | |
515d07de | 234 | return; |
1d96a4a8 | 235 | } |
96afef1d JN |
236 | } |
237 | ||
b13d8e28 JN |
238 | pconf0 = VLV_GPIO_PCONF0(map->base_offset); |
239 | padval = VLV_GPIO_PAD_VAL(map->base_offset); | |
2ab8b458 | 240 | |
a580516d | 241 | mutex_lock(&dev_priv->sb_lock); |
b13d8e28 | 242 | if (!map->init) { |
2ab8b458 | 243 | /* FIXME: remove constant below */ |
b0c91cd0 | 244 | vlv_iosf_sb_write(dev_priv, port, pconf0, 0x2000CC00); |
b13d8e28 | 245 | map->init = true; |
2ab8b458 SK |
246 | } |
247 | ||
515d07de JN |
248 | tmp = 0x4 | value; |
249 | vlv_iosf_sb_write(dev_priv, port, padval, tmp); | |
250 | mutex_unlock(&dev_priv->sb_lock); | |
251 | } | |
252 | ||
a0a6d4ff JN |
253 | static void chv_exec_gpio(struct drm_i915_private *dev_priv, |
254 | u8 gpio_source, u8 gpio_index, bool value) | |
255 | { | |
256 | u16 cfg0, cfg1; | |
257 | u16 family_num; | |
258 | u8 port; | |
259 | ||
260 | if (dev_priv->vbt.dsi.seq_version >= 3) { | |
261 | if (gpio_index >= CHV_GPIO_IDX_START_SE) { | |
262 | /* XXX: it's unclear whether 255->57 is part of SE. */ | |
263 | gpio_index -= CHV_GPIO_IDX_START_SE; | |
264 | port = CHV_IOSF_PORT_GPIO_SE; | |
265 | } else if (gpio_index >= CHV_GPIO_IDX_START_SW) { | |
266 | gpio_index -= CHV_GPIO_IDX_START_SW; | |
267 | port = CHV_IOSF_PORT_GPIO_SW; | |
268 | } else if (gpio_index >= CHV_GPIO_IDX_START_E) { | |
269 | gpio_index -= CHV_GPIO_IDX_START_E; | |
270 | port = CHV_IOSF_PORT_GPIO_E; | |
271 | } else { | |
272 | port = CHV_IOSF_PORT_GPIO_N; | |
273 | } | |
274 | } else { | |
275 | /* XXX: The spec is unclear about CHV GPIO on seq v2 */ | |
276 | if (gpio_source != 0) { | |
277 | DRM_DEBUG_KMS("unknown gpio source %u\n", gpio_source); | |
278 | return; | |
279 | } | |
280 | ||
281 | if (gpio_index >= CHV_GPIO_IDX_START_E) { | |
282 | DRM_DEBUG_KMS("invalid gpio index %u for GPIO N\n", | |
283 | gpio_index); | |
284 | return; | |
285 | } | |
286 | ||
287 | port = CHV_IOSF_PORT_GPIO_N; | |
288 | } | |
289 | ||
290 | family_num = gpio_index / CHV_VBT_MAX_PINS_PER_FMLY; | |
291 | gpio_index = gpio_index % CHV_VBT_MAX_PINS_PER_FMLY; | |
292 | ||
293 | cfg0 = CHV_GPIO_PAD_CFG0(family_num, gpio_index); | |
294 | cfg1 = CHV_GPIO_PAD_CFG1(family_num, gpio_index); | |
295 | ||
296 | mutex_lock(&dev_priv->sb_lock); | |
297 | vlv_iosf_sb_write(dev_priv, port, cfg1, 0); | |
298 | vlv_iosf_sb_write(dev_priv, port, cfg0, | |
299 | CHV_GPIO_GPIOCFG_GPO | CHV_GPIO_GPIOTXSTATE(value)); | |
300 | mutex_unlock(&dev_priv->sb_lock); | |
301 | } | |
302 | ||
515d07de JN |
303 | static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data) |
304 | { | |
305 | struct drm_device *dev = intel_dsi->base.base.dev; | |
fac5e23e | 306 | struct drm_i915_private *dev_priv = to_i915(dev); |
515d07de JN |
307 | u8 gpio_source, gpio_index; |
308 | bool value; | |
309 | ||
310 | if (dev_priv->vbt.dsi.seq_version >= 3) | |
311 | data++; | |
312 | ||
313 | gpio_index = *data++; | |
314 | ||
315 | /* gpio source in sequence v2 only */ | |
316 | if (dev_priv->vbt.dsi.seq_version == 2) | |
317 | gpio_source = (*data >> 1) & 3; | |
318 | else | |
319 | gpio_source = 0; | |
2ab8b458 SK |
320 | |
321 | /* pull up/down */ | |
515d07de JN |
322 | value = *data++ & 1; |
323 | ||
324 | if (IS_VALLEYVIEW(dev_priv)) | |
325 | vlv_exec_gpio(dev_priv, gpio_source, gpio_index, value); | |
a0a6d4ff JN |
326 | else if (IS_CHERRYVIEW(dev_priv)) |
327 | chv_exec_gpio(dev_priv, gpio_source, gpio_index, value); | |
515d07de JN |
328 | else |
329 | DRM_DEBUG_KMS("GPIO element not supported on this platform\n"); | |
2ab8b458 SK |
330 | |
331 | return data; | |
332 | } | |
333 | ||
29bbdcb0 JN |
334 | static const u8 *mipi_exec_i2c_skip(struct intel_dsi *intel_dsi, const u8 *data) |
335 | { | |
336 | return data + *(data + 6) + 7; | |
337 | } | |
338 | ||
5b48ca0f JN |
339 | typedef const u8 * (*fn_mipi_elem_exec)(struct intel_dsi *intel_dsi, |
340 | const u8 *data); | |
2ab8b458 | 341 | static const fn_mipi_elem_exec exec_elem[] = { |
28c72840 JN |
342 | [MIPI_SEQ_ELEM_SEND_PKT] = mipi_exec_send_packet, |
343 | [MIPI_SEQ_ELEM_DELAY] = mipi_exec_delay, | |
344 | [MIPI_SEQ_ELEM_GPIO] = mipi_exec_gpio, | |
29bbdcb0 | 345 | [MIPI_SEQ_ELEM_I2C] = mipi_exec_i2c_skip, |
2ab8b458 SK |
346 | }; |
347 | ||
348 | /* | |
349 | * MIPI Sequence from VBT #53 parsing logic | |
350 | * We have already separated each seqence during bios parsing | |
351 | * Following is generic execution function for any sequence | |
352 | */ | |
353 | ||
354 | static const char * const seq_name[] = { | |
5cda0d20 JN |
355 | [MIPI_SEQ_ASSERT_RESET] = "MIPI_SEQ_ASSERT_RESET", |
356 | [MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP", | |
357 | [MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON", | |
358 | [MIPI_SEQ_DISPLAY_OFF] = "MIPI_SEQ_DISPLAY_OFF", | |
359 | [MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET", | |
bc95ce7f JN |
360 | [MIPI_SEQ_BACKLIGHT_ON] = "MIPI_SEQ_BACKLIGHT_ON", |
361 | [MIPI_SEQ_BACKLIGHT_OFF] = "MIPI_SEQ_BACKLIGHT_OFF", | |
362 | [MIPI_SEQ_TEAR_ON] = "MIPI_SEQ_TEAR_ON", | |
363 | [MIPI_SEQ_TEAR_OFF] = "MIPI_SEQ_TEAR_OFF", | |
364 | [MIPI_SEQ_POWER_ON] = "MIPI_SEQ_POWER_ON", | |
365 | [MIPI_SEQ_POWER_OFF] = "MIPI_SEQ_POWER_OFF", | |
2ab8b458 SK |
366 | }; |
367 | ||
5cda0d20 JN |
368 | static const char *sequence_name(enum mipi_seq seq_id) |
369 | { | |
370 | if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id]) | |
371 | return seq_name[seq_id]; | |
372 | else | |
373 | return "(unknown)"; | |
374 | } | |
375 | ||
c67fed85 | 376 | static void generic_exec_sequence(struct drm_panel *panel, enum mipi_seq seq_id) |
2ab8b458 | 377 | { |
c67fed85 JN |
378 | struct vbt_panel *vbt_panel = to_vbt_panel(panel); |
379 | struct intel_dsi *intel_dsi = vbt_panel->intel_dsi; | |
2a33d934 | 380 | struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); |
c67fed85 | 381 | const u8 *data; |
2ab8b458 | 382 | fn_mipi_elem_exec mipi_elem_exec; |
2ab8b458 | 383 | |
c67fed85 | 384 | if (WARN_ON(seq_id >= ARRAY_SIZE(dev_priv->vbt.dsi.sequence))) |
2ab8b458 SK |
385 | return; |
386 | ||
c67fed85 | 387 | data = dev_priv->vbt.dsi.sequence[seq_id]; |
f7d3c970 | 388 | if (!data) |
c67fed85 | 389 | return; |
2ab8b458 | 390 | |
c67fed85 JN |
391 | WARN_ON(*data != seq_id); |
392 | ||
393 | DRM_DEBUG_KMS("Starting MIPI sequence %d - %s\n", | |
394 | seq_id, sequence_name(seq_id)); | |
395 | ||
396 | /* Skip Sequence Byte. */ | |
2ab8b458 SK |
397 | data++; |
398 | ||
2a33d934 JN |
399 | /* Skip Size of Sequence. */ |
400 | if (dev_priv->vbt.dsi.seq_version >= 3) | |
401 | data += 4; | |
402 | ||
2ab8b458 | 403 | while (1) { |
28c72840 | 404 | u8 operation_byte = *data++; |
40795782 JN |
405 | u8 operation_size = 0; |
406 | ||
407 | if (operation_byte == MIPI_SEQ_ELEM_END) | |
408 | break; | |
409 | ||
410 | if (operation_byte < ARRAY_SIZE(exec_elem)) | |
411 | mipi_elem_exec = exec_elem[operation_byte]; | |
412 | else | |
413 | mipi_elem_exec = NULL; | |
414 | ||
415 | /* Size of Operation. */ | |
416 | if (dev_priv->vbt.dsi.seq_version >= 3) | |
417 | operation_size = *data++; | |
418 | ||
419 | if (mipi_elem_exec) { | |
420 | data = mipi_elem_exec(intel_dsi, data); | |
421 | } else if (operation_size) { | |
422 | /* We have size, skip. */ | |
423 | DRM_DEBUG_KMS("Unsupported MIPI operation byte %u\n", | |
424 | operation_byte); | |
425 | data += operation_size; | |
426 | } else { | |
427 | /* No size, can't skip without parsing. */ | |
28c72840 JN |
428 | DRM_ERROR("Unsupported MIPI operation byte %u\n", |
429 | operation_byte); | |
2ab8b458 SK |
430 | return; |
431 | } | |
2ab8b458 SK |
432 | } |
433 | } | |
434 | ||
593e0622 JN |
435 | static int vbt_panel_prepare(struct drm_panel *panel) |
436 | { | |
c67fed85 JN |
437 | generic_exec_sequence(panel, MIPI_SEQ_ASSERT_RESET); |
438 | generic_exec_sequence(panel, MIPI_SEQ_INIT_OTP); | |
593e0622 JN |
439 | |
440 | return 0; | |
441 | } | |
442 | ||
443 | static int vbt_panel_unprepare(struct drm_panel *panel) | |
444 | { | |
c67fed85 | 445 | generic_exec_sequence(panel, MIPI_SEQ_DEASSERT_RESET); |
593e0622 JN |
446 | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static int vbt_panel_enable(struct drm_panel *panel) | |
451 | { | |
c67fed85 | 452 | generic_exec_sequence(panel, MIPI_SEQ_DISPLAY_ON); |
593e0622 JN |
453 | |
454 | return 0; | |
455 | } | |
456 | ||
457 | static int vbt_panel_disable(struct drm_panel *panel) | |
458 | { | |
c67fed85 | 459 | generic_exec_sequence(panel, MIPI_SEQ_DISPLAY_OFF); |
593e0622 JN |
460 | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static int vbt_panel_get_modes(struct drm_panel *panel) | |
465 | { | |
466 | struct vbt_panel *vbt_panel = to_vbt_panel(panel); | |
467 | struct intel_dsi *intel_dsi = vbt_panel->intel_dsi; | |
468 | struct drm_device *dev = intel_dsi->base.base.dev; | |
fac5e23e | 469 | struct drm_i915_private *dev_priv = to_i915(dev); |
593e0622 JN |
470 | struct drm_display_mode *mode; |
471 | ||
472 | if (!panel->connector) | |
473 | return 0; | |
474 | ||
475 | mode = drm_mode_duplicate(dev, dev_priv->vbt.lfp_lvds_vbt_mode); | |
476 | if (!mode) | |
477 | return 0; | |
478 | ||
479 | mode->type |= DRM_MODE_TYPE_PREFERRED; | |
480 | ||
481 | drm_mode_probed_add(panel->connector, mode); | |
482 | ||
483 | return 1; | |
484 | } | |
485 | ||
486 | static const struct drm_panel_funcs vbt_panel_funcs = { | |
487 | .disable = vbt_panel_disable, | |
488 | .unprepare = vbt_panel_unprepare, | |
489 | .prepare = vbt_panel_prepare, | |
490 | .enable = vbt_panel_enable, | |
491 | .get_modes = vbt_panel_get_modes, | |
492 | }; | |
493 | ||
494 | struct drm_panel *vbt_panel_init(struct intel_dsi *intel_dsi, u16 panel_id) | |
2ab8b458 | 495 | { |
2ab8b458 | 496 | struct drm_device *dev = intel_dsi->base.base.dev; |
fac5e23e | 497 | struct drm_i915_private *dev_priv = to_i915(dev); |
2ab8b458 SK |
498 | struct mipi_config *mipi_config = dev_priv->vbt.dsi.config; |
499 | struct mipi_pps_data *pps = dev_priv->vbt.dsi.pps; | |
500 | struct drm_display_mode *mode = dev_priv->vbt.lfp_lvds_vbt_mode; | |
593e0622 | 501 | struct vbt_panel *vbt_panel; |
1e78aa01 | 502 | u32 bpp; |
2ab8b458 SK |
503 | u32 tlpx_ns, extra_byte_count, bitrate, tlpx_ui; |
504 | u32 ui_num, ui_den; | |
505 | u32 prepare_cnt, exit_zero_cnt, clk_zero_cnt, trail_cnt; | |
506 | u32 ths_prepare_ns, tclk_trail_ns; | |
507 | u32 tclk_prepare_clkzero, ths_prepare_hszero; | |
508 | u32 lp_to_hs_switch, hs_to_lp_switch; | |
7f0c8605 SK |
509 | u32 pclk, computed_ddr; |
510 | u16 burst_mode_ratio; | |
759d10c2 | 511 | enum port port; |
2ab8b458 SK |
512 | |
513 | DRM_DEBUG_KMS("\n"); | |
514 | ||
515 | intel_dsi->eotp_pkt = mipi_config->eot_pkt_disabled ? 0 : 1; | |
516 | intel_dsi->clock_stop = mipi_config->enable_clk_stop ? 1 : 0; | |
517 | intel_dsi->lane_count = mipi_config->lane_cnt + 1; | |
43367ec9 R |
518 | intel_dsi->pixel_format = |
519 | pixel_format_from_register_bits( | |
520 | mipi_config->videomode_color_format << 7); | |
1e78aa01 JN |
521 | bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); |
522 | ||
369602d3 | 523 | intel_dsi->dual_link = mipi_config->dual_link; |
a9da9bce | 524 | intel_dsi->pixel_overlap = mipi_config->pixel_overlap; |
2ab8b458 SK |
525 | intel_dsi->operation_mode = mipi_config->is_cmd_mode; |
526 | intel_dsi->video_mode_format = mipi_config->video_transfer_mode; | |
527 | intel_dsi->escape_clk_div = mipi_config->byte_clk_sel; | |
528 | intel_dsi->lp_rx_timeout = mipi_config->lp_rx_timeout; | |
529 | intel_dsi->turn_arnd_val = mipi_config->turn_around_timeout; | |
530 | intel_dsi->rst_timer_val = mipi_config->device_reset_timer; | |
531 | intel_dsi->init_count = mipi_config->master_init_timer; | |
532 | intel_dsi->bw_timer = mipi_config->dbi_bw_timer; | |
b5fbcd98 SK |
533 | intel_dsi->video_frmt_cfg_bits = |
534 | mipi_config->bta_enabled ? DISABLE_VIDEO_BTA : 0; | |
2ab8b458 | 535 | |
7f0c8605 SK |
536 | pclk = mode->clock; |
537 | ||
a9da9bce GS |
538 | /* In dual link mode each port needs half of pixel clock */ |
539 | if (intel_dsi->dual_link) { | |
540 | pclk = pclk / 2; | |
541 | ||
542 | /* we can enable pixel_overlap if needed by panel. In this | |
543 | * case we need to increase the pixelclock for extra pixels | |
544 | */ | |
545 | if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) { | |
546 | pclk += DIV_ROUND_UP(mode->vtotal * | |
547 | intel_dsi->pixel_overlap * | |
548 | 60, 1000); | |
549 | } | |
550 | } | |
551 | ||
7f0c8605 SK |
552 | /* Burst Mode Ratio |
553 | * Target ddr frequency from VBT / non burst ddr freq | |
554 | * multiply by 100 to preserve remainder | |
555 | */ | |
556 | if (intel_dsi->video_mode_format == VIDEO_MODE_BURST) { | |
557 | if (mipi_config->target_burst_mode_freq) { | |
1e78aa01 | 558 | computed_ddr = (pclk * bpp) / intel_dsi->lane_count; |
7f0c8605 SK |
559 | |
560 | if (mipi_config->target_burst_mode_freq < | |
561 | computed_ddr) { | |
562 | DRM_ERROR("Burst mode freq is less than computed\n"); | |
593e0622 | 563 | return NULL; |
7f0c8605 SK |
564 | } |
565 | ||
566 | burst_mode_ratio = DIV_ROUND_UP( | |
567 | mipi_config->target_burst_mode_freq * 100, | |
568 | computed_ddr); | |
569 | ||
570 | pclk = DIV_ROUND_UP(pclk * burst_mode_ratio, 100); | |
571 | } else { | |
572 | DRM_ERROR("Burst mode target is not set\n"); | |
593e0622 | 573 | return NULL; |
7f0c8605 SK |
574 | } |
575 | } else | |
576 | burst_mode_ratio = 100; | |
577 | ||
578 | intel_dsi->burst_mode_ratio = burst_mode_ratio; | |
579 | intel_dsi->pclk = pclk; | |
580 | ||
1e78aa01 | 581 | bitrate = (pclk * bpp) / intel_dsi->lane_count; |
7f0c8605 | 582 | |
2ab8b458 SK |
583 | switch (intel_dsi->escape_clk_div) { |
584 | case 0: | |
585 | tlpx_ns = 50; | |
586 | break; | |
587 | case 1: | |
588 | tlpx_ns = 100; | |
589 | break; | |
590 | ||
591 | case 2: | |
592 | tlpx_ns = 200; | |
593 | break; | |
594 | default: | |
595 | tlpx_ns = 50; | |
596 | break; | |
597 | } | |
598 | ||
599 | switch (intel_dsi->lane_count) { | |
600 | case 1: | |
601 | case 2: | |
602 | extra_byte_count = 2; | |
603 | break; | |
604 | case 3: | |
605 | extra_byte_count = 4; | |
606 | break; | |
607 | case 4: | |
608 | default: | |
609 | extra_byte_count = 3; | |
610 | break; | |
611 | } | |
612 | ||
613 | /* | |
614 | * ui(s) = 1/f [f in hz] | |
615 | * ui(ns) = 10^9 / (f*10^6) [f in Mhz] -> 10^3/f(Mhz) | |
616 | */ | |
617 | ||
618 | /* in Kbps */ | |
619 | ui_num = NS_KHZ_RATIO; | |
620 | ui_den = bitrate; | |
621 | ||
622 | tclk_prepare_clkzero = mipi_config->tclk_prepare_clkzero; | |
623 | ths_prepare_hszero = mipi_config->ths_prepare_hszero; | |
624 | ||
625 | /* | |
626 | * B060 | |
627 | * LP byte clock = TLPX/ (8UI) | |
628 | */ | |
629 | intel_dsi->lp_byte_clk = DIV_ROUND_UP(tlpx_ns * ui_den, 8 * ui_num); | |
630 | ||
631 | /* count values in UI = (ns value) * (bitrate / (2 * 10^6)) | |
632 | * | |
633 | * Since txddrclkhs_i is 2xUI, all the count values programmed in | |
634 | * DPHY param register are divided by 2 | |
635 | * | |
636 | * prepare count | |
637 | */ | |
b5fbcd98 SK |
638 | ths_prepare_ns = max(mipi_config->ths_prepare, |
639 | mipi_config->tclk_prepare); | |
2ab8b458 SK |
640 | prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * 2); |
641 | ||
642 | /* exit zero count */ | |
643 | exit_zero_cnt = DIV_ROUND_UP( | |
644 | (ths_prepare_hszero - ths_prepare_ns) * ui_den, | |
645 | ui_num * 2 | |
646 | ); | |
647 | ||
648 | /* | |
ebe69dd3 | 649 | * Exit zero is unified val ths_zero and ths_exit |
2ab8b458 SK |
650 | * minimum value for ths_exit = 110ns |
651 | * min (exit_zero_cnt * 2) = 110/UI | |
652 | * exit_zero_cnt = 55/UI | |
653 | */ | |
ebe69dd3 CW |
654 | if (exit_zero_cnt < (55 * ui_den / ui_num) && (55 * ui_den) % ui_num) |
655 | exit_zero_cnt += 1; | |
2ab8b458 SK |
656 | |
657 | /* clk zero count */ | |
658 | clk_zero_cnt = DIV_ROUND_UP( | |
659 | (tclk_prepare_clkzero - ths_prepare_ns) | |
660 | * ui_den, 2 * ui_num); | |
661 | ||
662 | /* trail count */ | |
663 | tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail); | |
664 | trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, 2 * ui_num); | |
665 | ||
666 | if (prepare_cnt > PREPARE_CNT_MAX || | |
667 | exit_zero_cnt > EXIT_ZERO_CNT_MAX || | |
668 | clk_zero_cnt > CLK_ZERO_CNT_MAX || | |
669 | trail_cnt > TRAIL_CNT_MAX) | |
670 | DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n"); | |
671 | ||
672 | if (prepare_cnt > PREPARE_CNT_MAX) | |
673 | prepare_cnt = PREPARE_CNT_MAX; | |
674 | ||
675 | if (exit_zero_cnt > EXIT_ZERO_CNT_MAX) | |
676 | exit_zero_cnt = EXIT_ZERO_CNT_MAX; | |
677 | ||
678 | if (clk_zero_cnt > CLK_ZERO_CNT_MAX) | |
679 | clk_zero_cnt = CLK_ZERO_CNT_MAX; | |
680 | ||
681 | if (trail_cnt > TRAIL_CNT_MAX) | |
682 | trail_cnt = TRAIL_CNT_MAX; | |
683 | ||
684 | /* B080 */ | |
685 | intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 | | |
686 | clk_zero_cnt << 8 | prepare_cnt; | |
687 | ||
688 | /* | |
689 | * LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2 | |
690 | * + 10UI + Extra Byte Count | |
691 | * | |
692 | * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count | |
693 | * Extra Byte Count is calculated according to number of lanes. | |
694 | * High Low Switch Count is the Max of LP to HS and | |
695 | * HS to LP switch count | |
696 | * | |
697 | */ | |
698 | tlpx_ui = DIV_ROUND_UP(tlpx_ns * ui_den, ui_num); | |
699 | ||
700 | /* B044 */ | |
701 | /* FIXME: | |
702 | * The comment above does not match with the code */ | |
703 | lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * 2 + | |
704 | exit_zero_cnt * 2 + 10, 8); | |
705 | ||
706 | hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8); | |
707 | ||
708 | intel_dsi->hs_to_lp_count = max(lp_to_hs_switch, hs_to_lp_switch); | |
709 | intel_dsi->hs_to_lp_count += extra_byte_count; | |
710 | ||
711 | /* B088 */ | |
712 | /* LP -> HS for clock lanes | |
713 | * LP clk sync + LP11 + LP01 + tclk_prepare + tclk_zero + | |
714 | * extra byte count | |
715 | * 2TPLX + 1TLPX + 1 TPLX(in ns) + prepare_cnt * 2 + clk_zero_cnt * | |
716 | * 2(in UI) + extra byte count | |
717 | * In byteclks = (4TLPX + prepare_cnt * 2 + clk_zero_cnt *2 (in UI)) / | |
718 | * 8 + extra byte count | |
719 | */ | |
720 | intel_dsi->clk_lp_to_hs_count = | |
721 | DIV_ROUND_UP( | |
722 | 4 * tlpx_ui + prepare_cnt * 2 + | |
723 | clk_zero_cnt * 2, | |
724 | 8); | |
725 | ||
726 | intel_dsi->clk_lp_to_hs_count += extra_byte_count; | |
727 | ||
728 | /* HS->LP for Clock Lanes | |
729 | * Low Power clock synchronisations + 1Tx byteclk + tclk_trail + | |
730 | * Extra byte count | |
731 | * 2TLPX + 8UI + (trail_count*2)(in UI) + Extra byte count | |
732 | * In byteclks = (2*TLpx(in UI) + trail_count*2 +8)(in UI)/8 + | |
733 | * Extra byte count | |
734 | */ | |
735 | intel_dsi->clk_hs_to_lp_count = | |
736 | DIV_ROUND_UP(2 * tlpx_ui + trail_cnt * 2 + 8, | |
737 | 8); | |
738 | intel_dsi->clk_hs_to_lp_count += extra_byte_count; | |
739 | ||
740 | DRM_DEBUG_KMS("Eot %s\n", intel_dsi->eotp_pkt ? "enabled" : "disabled"); | |
741 | DRM_DEBUG_KMS("Clockstop %s\n", intel_dsi->clock_stop ? | |
742 | "disabled" : "enabled"); | |
743 | DRM_DEBUG_KMS("Mode %s\n", intel_dsi->operation_mode ? "command" : "video"); | |
a9da9bce GS |
744 | if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) |
745 | DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_FRONT_BACK\n"); | |
746 | else if (intel_dsi->dual_link == DSI_DUAL_LINK_PIXEL_ALT) | |
747 | DRM_DEBUG_KMS("Dual link: DSI_DUAL_LINK_PIXEL_ALT\n"); | |
748 | else | |
749 | DRM_DEBUG_KMS("Dual link: NONE\n"); | |
2ab8b458 SK |
750 | DRM_DEBUG_KMS("Pixel Format %d\n", intel_dsi->pixel_format); |
751 | DRM_DEBUG_KMS("TLPX %d\n", intel_dsi->escape_clk_div); | |
752 | DRM_DEBUG_KMS("LP RX Timeout 0x%x\n", intel_dsi->lp_rx_timeout); | |
753 | DRM_DEBUG_KMS("Turnaround Timeout 0x%x\n", intel_dsi->turn_arnd_val); | |
754 | DRM_DEBUG_KMS("Init Count 0x%x\n", intel_dsi->init_count); | |
755 | DRM_DEBUG_KMS("HS to LP Count 0x%x\n", intel_dsi->hs_to_lp_count); | |
756 | DRM_DEBUG_KMS("LP Byte Clock %d\n", intel_dsi->lp_byte_clk); | |
757 | DRM_DEBUG_KMS("DBI BW Timer 0x%x\n", intel_dsi->bw_timer); | |
758 | DRM_DEBUG_KMS("LP to HS Clock Count 0x%x\n", intel_dsi->clk_lp_to_hs_count); | |
759 | DRM_DEBUG_KMS("HS to LP Clock Count 0x%x\n", intel_dsi->clk_hs_to_lp_count); | |
760 | DRM_DEBUG_KMS("BTA %s\n", | |
761 | intel_dsi->video_frmt_cfg_bits & DISABLE_VIDEO_BTA ? | |
762 | "disabled" : "enabled"); | |
763 | ||
764 | /* delays in VBT are in unit of 100us, so need to convert | |
765 | * here in ms | |
766 | * Delay (100us) * 100 /1000 = Delay / 10 (ms) */ | |
767 | intel_dsi->backlight_off_delay = pps->bl_disable_delay / 10; | |
768 | intel_dsi->backlight_on_delay = pps->bl_enable_delay / 10; | |
769 | intel_dsi->panel_on_delay = pps->panel_on_delay / 10; | |
770 | intel_dsi->panel_off_delay = pps->panel_off_delay / 10; | |
771 | intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10; | |
772 | ||
593e0622 JN |
773 | /* This is cheating a bit with the cleanup. */ |
774 | vbt_panel = devm_kzalloc(dev->dev, sizeof(*vbt_panel), GFP_KERNEL); | |
62ab420f IY |
775 | if (!vbt_panel) |
776 | return NULL; | |
2ab8b458 | 777 | |
593e0622 JN |
778 | vbt_panel->intel_dsi = intel_dsi; |
779 | drm_panel_init(&vbt_panel->panel); | |
780 | vbt_panel->panel.funcs = &vbt_panel_funcs; | |
781 | drm_panel_add(&vbt_panel->panel); | |
2ab8b458 | 782 | |
759d10c2 JN |
783 | /* a regular driver would get the device in probe */ |
784 | for_each_dsi_port(port, intel_dsi->ports) { | |
785 | mipi_dsi_attach(intel_dsi->dsi_hosts[port]->device); | |
786 | } | |
787 | ||
593e0622 | 788 | return &vbt_panel->panel; |
2ab8b458 | 789 | } |