2 * linux/drivers/video/omap2/dss/dsi.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #define DSS_SUBSYS_NAME "DSI"
22 #include <linux/kernel.h>
24 #include <linux/clk.h>
25 #include <linux/device.h>
26 #include <linux/err.h>
27 #include <linux/interrupt.h>
28 #include <linux/delay.h>
29 #include <linux/mutex.h>
30 #include <linux/semaphore.h>
31 #include <linux/seq_file.h>
32 #include <linux/platform_device.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/wait.h>
35 #include <linux/workqueue.h>
37 #include <plat/display.h>
38 #include <plat/clock.h>
41 #include "dss_features.h"
43 /*#define VERBOSE_IRQ*/
44 #define DSI_CATCH_MISSING_TE
46 struct dsi_reg { u16 idx; };
48 #define DSI_REG(idx) ((const struct dsi_reg) { idx })
50 #define DSI_SZ_REGS SZ_1K
51 /* DSI Protocol Engine */
53 #define DSI_REVISION DSI_REG(0x0000)
54 #define DSI_SYSCONFIG DSI_REG(0x0010)
55 #define DSI_SYSSTATUS DSI_REG(0x0014)
56 #define DSI_IRQSTATUS DSI_REG(0x0018)
57 #define DSI_IRQENABLE DSI_REG(0x001C)
58 #define DSI_CTRL DSI_REG(0x0040)
59 #define DSI_COMPLEXIO_CFG1 DSI_REG(0x0048)
60 #define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(0x004C)
61 #define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(0x0050)
62 #define DSI_CLK_CTRL DSI_REG(0x0054)
63 #define DSI_TIMING1 DSI_REG(0x0058)
64 #define DSI_TIMING2 DSI_REG(0x005C)
65 #define DSI_VM_TIMING1 DSI_REG(0x0060)
66 #define DSI_VM_TIMING2 DSI_REG(0x0064)
67 #define DSI_VM_TIMING3 DSI_REG(0x0068)
68 #define DSI_CLK_TIMING DSI_REG(0x006C)
69 #define DSI_TX_FIFO_VC_SIZE DSI_REG(0x0070)
70 #define DSI_RX_FIFO_VC_SIZE DSI_REG(0x0074)
71 #define DSI_COMPLEXIO_CFG2 DSI_REG(0x0078)
72 #define DSI_RX_FIFO_VC_FULLNESS DSI_REG(0x007C)
73 #define DSI_VM_TIMING4 DSI_REG(0x0080)
74 #define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(0x0084)
75 #define DSI_VM_TIMING5 DSI_REG(0x0088)
76 #define DSI_VM_TIMING6 DSI_REG(0x008C)
77 #define DSI_VM_TIMING7 DSI_REG(0x0090)
78 #define DSI_STOPCLK_TIMING DSI_REG(0x0094)
79 #define DSI_VC_CTRL(n) DSI_REG(0x0100 + (n * 0x20))
80 #define DSI_VC_TE(n) DSI_REG(0x0104 + (n * 0x20))
81 #define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(0x0108 + (n * 0x20))
82 #define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(0x010C + (n * 0x20))
83 #define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(0x0110 + (n * 0x20))
84 #define DSI_VC_IRQSTATUS(n) DSI_REG(0x0118 + (n * 0x20))
85 #define DSI_VC_IRQENABLE(n) DSI_REG(0x011C + (n * 0x20))
89 #define DSI_DSIPHY_CFG0 DSI_REG(0x200 + 0x0000)
90 #define DSI_DSIPHY_CFG1 DSI_REG(0x200 + 0x0004)
91 #define DSI_DSIPHY_CFG2 DSI_REG(0x200 + 0x0008)
92 #define DSI_DSIPHY_CFG5 DSI_REG(0x200 + 0x0014)
94 /* DSI_PLL_CTRL_SCP */
96 #define DSI_PLL_CONTROL DSI_REG(0x300 + 0x0000)
97 #define DSI_PLL_STATUS DSI_REG(0x300 + 0x0004)
98 #define DSI_PLL_GO DSI_REG(0x300 + 0x0008)
99 #define DSI_PLL_CONFIGURATION1 DSI_REG(0x300 + 0x000C)
100 #define DSI_PLL_CONFIGURATION2 DSI_REG(0x300 + 0x0010)
102 #define REG_GET(idx, start, end) \
103 FLD_GET(dsi_read_reg(idx), start, end)
105 #define REG_FLD_MOD(idx, val, start, end) \
106 dsi_write_reg(idx, FLD_MOD(dsi_read_reg(idx), val, start, end))
108 /* Global interrupts */
109 #define DSI_IRQ_VC0 (1 << 0)
110 #define DSI_IRQ_VC1 (1 << 1)
111 #define DSI_IRQ_VC2 (1 << 2)
112 #define DSI_IRQ_VC3 (1 << 3)
113 #define DSI_IRQ_WAKEUP (1 << 4)
114 #define DSI_IRQ_RESYNC (1 << 5)
115 #define DSI_IRQ_PLL_LOCK (1 << 7)
116 #define DSI_IRQ_PLL_UNLOCK (1 << 8)
117 #define DSI_IRQ_PLL_RECALL (1 << 9)
118 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
119 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
120 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
121 #define DSI_IRQ_TE_TRIGGER (1 << 16)
122 #define DSI_IRQ_ACK_TRIGGER (1 << 17)
123 #define DSI_IRQ_SYNC_LOST (1 << 18)
124 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
125 #define DSI_IRQ_TA_TIMEOUT (1 << 20)
126 #define DSI_IRQ_ERROR_MASK \
127 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
129 #define DSI_IRQ_CHANNEL_MASK 0xf
131 /* Virtual channel interrupts */
132 #define DSI_VC_IRQ_CS (1 << 0)
133 #define DSI_VC_IRQ_ECC_CORR (1 << 1)
134 #define DSI_VC_IRQ_PACKET_SENT (1 << 2)
135 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
136 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
137 #define DSI_VC_IRQ_BTA (1 << 5)
138 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
139 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
140 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
141 #define DSI_VC_IRQ_ERROR_MASK \
142 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
143 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
144 DSI_VC_IRQ_FIFO_TX_UDF)
146 /* ComplexIO interrupts */
147 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
148 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
149 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
150 #define DSI_CIO_IRQ_ERRESC1 (1 << 5)
151 #define DSI_CIO_IRQ_ERRESC2 (1 << 6)
152 #define DSI_CIO_IRQ_ERRESC3 (1 << 7)
153 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
154 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
155 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
156 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
157 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
158 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
159 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
160 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
161 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
162 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
163 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
164 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
165 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
166 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
167 #define DSI_CIO_IRQ_ERROR_MASK \
168 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
169 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
170 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRCONTROL1 | \
171 DSI_CIO_IRQ_ERRCONTROL2 | DSI_CIO_IRQ_ERRCONTROL3 | \
172 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
173 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
174 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3)
176 #define DSI_DT_DCS_SHORT_WRITE_0 0x05
177 #define DSI_DT_DCS_SHORT_WRITE_1 0x15
178 #define DSI_DT_DCS_READ 0x06
179 #define DSI_DT_SET_MAX_RET_PKG_SIZE 0x37
180 #define DSI_DT_NULL_PACKET 0x09
181 #define DSI_DT_DCS_LONG_WRITE 0x39
183 #define DSI_DT_RX_ACK_WITH_ERR 0x02
184 #define DSI_DT_RX_DCS_LONG_READ 0x1c
185 #define DSI_DT_RX_SHORT_READ_1 0x21
186 #define DSI_DT_RX_SHORT_READ_2 0x22
188 typedef void (*omap_dsi_isr_t) (void *arg, u32 mask);
190 #define DSI_MAX_NR_ISRS 2
192 struct dsi_isr_data {
200 DSI_FIFO_SIZE_32 = 1,
201 DSI_FIFO_SIZE_64 = 2,
202 DSI_FIFO_SIZE_96 = 3,
203 DSI_FIFO_SIZE_128 = 4,
211 struct dsi_update_region {
213 struct omap_dss_device *device;
216 struct dsi_irq_stats {
217 unsigned long last_reset;
219 unsigned dsi_irqs[32];
220 unsigned vc_irqs[4][32];
221 unsigned cio_irqs[32];
224 struct dsi_isr_tables {
225 struct dsi_isr_data isr_table[DSI_MAX_NR_ISRS];
226 struct dsi_isr_data isr_table_vc[4][DSI_MAX_NR_ISRS];
227 struct dsi_isr_data isr_table_cio[DSI_MAX_NR_ISRS];
232 struct platform_device *pdev;
236 struct dsi_clock_info current_cinfo;
238 struct regulator *vdds_dsi_reg;
241 enum dsi_vc_mode mode;
242 struct omap_dss_device *dssdev;
243 enum fifo_size fifo_size;
248 struct semaphore bus_lock;
253 struct dsi_isr_tables isr_tables;
254 /* space for a copy used by the interrupt handler */
255 struct dsi_isr_tables isr_tables_copy;
258 struct dsi_update_region update_region;
262 struct workqueue_struct *workqueue;
264 void (*framedone_callback)(int, void *);
265 void *framedone_data;
267 struct delayed_work framedone_timeout_work;
269 #ifdef DSI_CATCH_MISSING_TE
270 struct timer_list te_timer;
273 unsigned long cache_req_pck;
274 unsigned long cache_clk_freq;
275 struct dsi_clock_info cache_cinfo;
278 spinlock_t errors_lock;
280 ktime_t perf_setup_time;
281 ktime_t perf_start_time;
286 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
287 spinlock_t irq_stats_lock;
288 struct dsi_irq_stats irq_stats;
290 /* DSI PLL Parameter Ranges */
291 unsigned long regm_max, regn_max;
292 unsigned long regm_dispc_max, regm_dsi_max;
293 unsigned long fint_min, fint_max;
294 unsigned long lpdiv_max;
298 static unsigned int dsi_perf;
299 module_param_named(dsi_perf, dsi_perf, bool, 0644);
302 static inline void dsi_write_reg(const struct dsi_reg idx, u32 val)
304 __raw_writel(val, dsi.base + idx.idx);
307 static inline u32 dsi_read_reg(const struct dsi_reg idx)
309 return __raw_readl(dsi.base + idx.idx);
313 void dsi_save_context(void)
317 void dsi_restore_context(void)
321 void dsi_bus_lock(void)
325 EXPORT_SYMBOL(dsi_bus_lock);
327 void dsi_bus_unlock(void)
331 EXPORT_SYMBOL(dsi_bus_unlock);
333 static bool dsi_bus_is_locked(void)
335 return dsi.bus_lock.count == 0;
338 static void dsi_completion_handler(void *data, u32 mask)
340 complete((struct completion *)data);
343 static inline int wait_for_bit_change(const struct dsi_reg idx, int bitnum,
348 while (REG_GET(idx, bitnum, bitnum) != value) {
357 static void dsi_perf_mark_setup(void)
359 dsi.perf_setup_time = ktime_get();
362 static void dsi_perf_mark_start(void)
364 dsi.perf_start_time = ktime_get();
367 static void dsi_perf_show(const char *name)
369 ktime_t t, setup_time, trans_time;
371 u32 setup_us, trans_us, total_us;
378 setup_time = ktime_sub(dsi.perf_start_time, dsi.perf_setup_time);
379 setup_us = (u32)ktime_to_us(setup_time);
383 trans_time = ktime_sub(t, dsi.perf_start_time);
384 trans_us = (u32)ktime_to_us(trans_time);
388 total_us = setup_us + trans_us;
390 total_bytes = dsi.update_region.w *
391 dsi.update_region.h *
392 dsi.update_region.device->ctrl.pixel_size / 8;
394 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
395 "%u bytes, %u kbytes/sec\n",
400 1000*1000 / total_us,
402 total_bytes * 1000 / total_us);
405 #define dsi_perf_mark_setup()
406 #define dsi_perf_mark_start()
407 #define dsi_perf_show(x)
410 static void print_irq_status(u32 status)
413 if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0)
416 printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status);
419 if (status & DSI_IRQ_##x) \
445 static void print_irq_status_vc(int channel, u32 status)
448 if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
451 printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status);
454 if (status & DSI_VC_IRQ_##x) \
471 static void print_irq_status_cio(u32 status)
473 printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status);
476 if (status & DSI_CIO_IRQ_##x) \
490 PIS(ERRCONTENTIONLP0_1);
491 PIS(ERRCONTENTIONLP1_1);
492 PIS(ERRCONTENTIONLP0_2);
493 PIS(ERRCONTENTIONLP1_2);
494 PIS(ERRCONTENTIONLP0_3);
495 PIS(ERRCONTENTIONLP1_3);
496 PIS(ULPSACTIVENOT_ALL0);
497 PIS(ULPSACTIVENOT_ALL1);
503 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
504 static void dsi_collect_irq_stats(u32 irqstatus, u32 *vcstatus, u32 ciostatus)
508 spin_lock(&dsi.irq_stats_lock);
510 dsi.irq_stats.irq_count++;
511 dss_collect_irq_stats(irqstatus, dsi.irq_stats.dsi_irqs);
513 for (i = 0; i < 4; ++i)
514 dss_collect_irq_stats(vcstatus[i], dsi.irq_stats.vc_irqs[i]);
516 dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);
518 spin_unlock(&dsi.irq_stats_lock);
521 #define dsi_collect_irq_stats(irqstatus, vcstatus, ciostatus)
524 static int debug_irq;
526 static void dsi_handle_irq_errors(u32 irqstatus, u32 *vcstatus, u32 ciostatus)
530 if (irqstatus & DSI_IRQ_ERROR_MASK) {
531 DSSERR("DSI error, irqstatus %x\n", irqstatus);
532 print_irq_status(irqstatus);
533 spin_lock(&dsi.errors_lock);
534 dsi.errors |= irqstatus & DSI_IRQ_ERROR_MASK;
535 spin_unlock(&dsi.errors_lock);
536 } else if (debug_irq) {
537 print_irq_status(irqstatus);
540 for (i = 0; i < 4; ++i) {
541 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
542 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
544 print_irq_status_vc(i, vcstatus[i]);
545 } else if (debug_irq) {
546 print_irq_status_vc(i, vcstatus[i]);
550 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
551 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
552 print_irq_status_cio(ciostatus);
553 } else if (debug_irq) {
554 print_irq_status_cio(ciostatus);
558 static void dsi_call_isrs(struct dsi_isr_data *isr_array,
559 unsigned isr_array_size, u32 irqstatus)
561 struct dsi_isr_data *isr_data;
564 for (i = 0; i < isr_array_size; i++) {
565 isr_data = &isr_array[i];
566 if (isr_data->isr && isr_data->mask & irqstatus)
567 isr_data->isr(isr_data->arg, irqstatus);
571 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables,
572 u32 irqstatus, u32 *vcstatus, u32 ciostatus)
576 dsi_call_isrs(isr_tables->isr_table,
577 ARRAY_SIZE(isr_tables->isr_table),
580 for (i = 0; i < 4; ++i) {
581 if (vcstatus[i] == 0)
583 dsi_call_isrs(isr_tables->isr_table_vc[i],
584 ARRAY_SIZE(isr_tables->isr_table_vc[i]),
589 dsi_call_isrs(isr_tables->isr_table_cio,
590 ARRAY_SIZE(isr_tables->isr_table_cio),
594 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
596 u32 irqstatus, vcstatus[4], ciostatus;
599 spin_lock(&dsi.irq_lock);
601 irqstatus = dsi_read_reg(DSI_IRQSTATUS);
603 /* IRQ is not for us */
605 spin_unlock(&dsi.irq_lock);
609 dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
610 /* flush posted write */
611 dsi_read_reg(DSI_IRQSTATUS);
613 for (i = 0; i < 4; ++i) {
614 if ((irqstatus & (1 << i)) == 0) {
619 vcstatus[i] = dsi_read_reg(DSI_VC_IRQSTATUS(i));
621 dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus[i]);
622 /* flush posted write */
623 dsi_read_reg(DSI_VC_IRQSTATUS(i));
626 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
627 ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
629 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
630 /* flush posted write */
631 dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
636 #ifdef DSI_CATCH_MISSING_TE
637 if (irqstatus & DSI_IRQ_TE_TRIGGER)
638 del_timer(&dsi.te_timer);
641 /* make a copy and unlock, so that isrs can unregister
643 memcpy(&dsi.isr_tables_copy, &dsi.isr_tables, sizeof(dsi.isr_tables));
645 spin_unlock(&dsi.irq_lock);
647 dsi_handle_isrs(&dsi.isr_tables_copy, irqstatus, vcstatus, ciostatus);
649 dsi_handle_irq_errors(irqstatus, vcstatus, ciostatus);
651 dsi_collect_irq_stats(irqstatus, vcstatus, ciostatus);
656 /* dsi.irq_lock has to be locked by the caller */
657 static void _omap_dsi_configure_irqs(struct dsi_isr_data *isr_array,
658 unsigned isr_array_size, u32 default_mask,
659 const struct dsi_reg enable_reg,
660 const struct dsi_reg status_reg)
662 struct dsi_isr_data *isr_data;
669 for (i = 0; i < isr_array_size; i++) {
670 isr_data = &isr_array[i];
672 if (isr_data->isr == NULL)
675 mask |= isr_data->mask;
678 old_mask = dsi_read_reg(enable_reg);
679 /* clear the irqstatus for newly enabled irqs */
680 dsi_write_reg(status_reg, (mask ^ old_mask) & mask);
681 dsi_write_reg(enable_reg, mask);
683 /* flush posted writes */
684 dsi_read_reg(enable_reg);
685 dsi_read_reg(status_reg);
688 /* dsi.irq_lock has to be locked by the caller */
689 static void _omap_dsi_set_irqs(void)
691 u32 mask = DSI_IRQ_ERROR_MASK;
692 #ifdef DSI_CATCH_MISSING_TE
693 mask |= DSI_IRQ_TE_TRIGGER;
695 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table,
696 ARRAY_SIZE(dsi.isr_tables.isr_table), mask,
697 DSI_IRQENABLE, DSI_IRQSTATUS);
700 /* dsi.irq_lock has to be locked by the caller */
701 static void _omap_dsi_set_irqs_vc(int vc)
703 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table_vc[vc],
704 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[vc]),
705 DSI_VC_IRQ_ERROR_MASK,
706 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc));
709 /* dsi.irq_lock has to be locked by the caller */
710 static void _omap_dsi_set_irqs_cio(void)
712 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table_cio,
713 ARRAY_SIZE(dsi.isr_tables.isr_table_cio),
714 DSI_CIO_IRQ_ERROR_MASK,
715 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS);
718 static void _dsi_initialize_irq(void)
723 spin_lock_irqsave(&dsi.irq_lock, flags);
725 memset(&dsi.isr_tables, 0, sizeof(dsi.isr_tables));
727 _omap_dsi_set_irqs();
728 for (vc = 0; vc < 4; ++vc)
729 _omap_dsi_set_irqs_vc(vc);
730 _omap_dsi_set_irqs_cio();
732 spin_unlock_irqrestore(&dsi.irq_lock, flags);
735 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
736 struct dsi_isr_data *isr_array, unsigned isr_array_size)
738 struct dsi_isr_data *isr_data;
744 /* check for duplicate entry and find a free slot */
746 for (i = 0; i < isr_array_size; i++) {
747 isr_data = &isr_array[i];
749 if (isr_data->isr == isr && isr_data->arg == arg &&
750 isr_data->mask == mask) {
754 if (isr_data->isr == NULL && free_idx == -1)
761 isr_data = &isr_array[free_idx];
764 isr_data->mask = mask;
769 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
770 struct dsi_isr_data *isr_array, unsigned isr_array_size)
772 struct dsi_isr_data *isr_data;
775 for (i = 0; i < isr_array_size; i++) {
776 isr_data = &isr_array[i];
777 if (isr_data->isr != isr || isr_data->arg != arg ||
778 isr_data->mask != mask)
781 isr_data->isr = NULL;
782 isr_data->arg = NULL;
791 static int dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask)
796 spin_lock_irqsave(&dsi.irq_lock, flags);
798 r = _dsi_register_isr(isr, arg, mask, dsi.isr_tables.isr_table,
799 ARRAY_SIZE(dsi.isr_tables.isr_table));
802 _omap_dsi_set_irqs();
804 spin_unlock_irqrestore(&dsi.irq_lock, flags);
809 static int dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask)
814 spin_lock_irqsave(&dsi.irq_lock, flags);
816 r = _dsi_unregister_isr(isr, arg, mask, dsi.isr_tables.isr_table,
817 ARRAY_SIZE(dsi.isr_tables.isr_table));
820 _omap_dsi_set_irqs();
822 spin_unlock_irqrestore(&dsi.irq_lock, flags);
827 static int dsi_register_isr_vc(int channel, omap_dsi_isr_t isr, void *arg,
833 spin_lock_irqsave(&dsi.irq_lock, flags);
835 r = _dsi_register_isr(isr, arg, mask,
836 dsi.isr_tables.isr_table_vc[channel],
837 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[channel]));
840 _omap_dsi_set_irqs_vc(channel);
842 spin_unlock_irqrestore(&dsi.irq_lock, flags);
847 static int dsi_unregister_isr_vc(int channel, omap_dsi_isr_t isr, void *arg,
853 spin_lock_irqsave(&dsi.irq_lock, flags);
855 r = _dsi_unregister_isr(isr, arg, mask,
856 dsi.isr_tables.isr_table_vc[channel],
857 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[channel]));
860 _omap_dsi_set_irqs_vc(channel);
862 spin_unlock_irqrestore(&dsi.irq_lock, flags);
867 static int dsi_register_isr_cio(omap_dsi_isr_t isr, void *arg, u32 mask)
872 spin_lock_irqsave(&dsi.irq_lock, flags);
874 r = _dsi_register_isr(isr, arg, mask, dsi.isr_tables.isr_table_cio,
875 ARRAY_SIZE(dsi.isr_tables.isr_table_cio));
878 _omap_dsi_set_irqs_cio();
880 spin_unlock_irqrestore(&dsi.irq_lock, flags);
885 static int dsi_unregister_isr_cio(omap_dsi_isr_t isr, void *arg, u32 mask)
890 spin_lock_irqsave(&dsi.irq_lock, flags);
892 r = _dsi_unregister_isr(isr, arg, mask, dsi.isr_tables.isr_table_cio,
893 ARRAY_SIZE(dsi.isr_tables.isr_table_cio));
896 _omap_dsi_set_irqs_cio();
898 spin_unlock_irqrestore(&dsi.irq_lock, flags);
903 static u32 dsi_get_errors(void)
907 spin_lock_irqsave(&dsi.errors_lock, flags);
910 spin_unlock_irqrestore(&dsi.errors_lock, flags);
914 /* DSI func clock. this could also be dsi_pll_hsdiv_dsi_clk */
915 static inline void enable_clocks(bool enable)
918 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
920 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
923 /* source clock for DSI PLL. this could also be PCLKFREE */
924 static inline void dsi_enable_pll_clock(bool enable)
927 dss_clk_enable(DSS_CLK_SYSCK);
929 dss_clk_disable(DSS_CLK_SYSCK);
931 if (enable && dsi.pll_locked) {
932 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1)
933 DSSERR("cannot lock PLL when enabling clocks\n");
938 static void _dsi_print_reset_status(void)
945 /* A dummy read using the SCP interface to any DSIPHY register is
946 * required after DSIPHY reset to complete the reset of the DSI complex
948 l = dsi_read_reg(DSI_DSIPHY_CFG5);
950 printk(KERN_DEBUG "DSI resets: ");
952 l = dsi_read_reg(DSI_PLL_STATUS);
953 printk("PLL (%d) ", FLD_GET(l, 0, 0));
955 l = dsi_read_reg(DSI_COMPLEXIO_CFG1);
956 printk("CIO (%d) ", FLD_GET(l, 29, 29));
958 l = dsi_read_reg(DSI_DSIPHY_CFG5);
959 printk("PHY (%x, %d, %d, %d)\n",
966 #define _dsi_print_reset_status()
969 static inline int dsi_if_enable(bool enable)
971 DSSDBG("dsi_if_enable(%d)\n", enable);
973 enable = enable ? 1 : 0;
974 REG_FLD_MOD(DSI_CTRL, enable, 0, 0); /* IF_EN */
976 if (wait_for_bit_change(DSI_CTRL, 0, enable) != enable) {
977 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
984 unsigned long dsi_get_pll_hsdiv_dispc_rate(void)
986 return dsi.current_cinfo.dsi_pll_hsdiv_dispc_clk;
989 static unsigned long dsi_get_pll_hsdiv_dsi_rate(void)
991 return dsi.current_cinfo.dsi_pll_hsdiv_dsi_clk;
994 static unsigned long dsi_get_txbyteclkhs(void)
996 return dsi.current_cinfo.clkin4ddr / 16;
999 static unsigned long dsi_fclk_rate(void)
1003 if (dss_get_dsi_clk_source() == DSS_CLK_SRC_FCK) {
1004 /* DSI FCLK source is DSS_CLK_FCK */
1005 r = dss_clk_get_rate(DSS_CLK_FCK);
1007 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
1008 r = dsi_get_pll_hsdiv_dsi_rate();
1014 static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev)
1016 unsigned long dsi_fclk;
1017 unsigned lp_clk_div;
1018 unsigned long lp_clk;
1020 lp_clk_div = dssdev->phy.dsi.div.lp_clk_div;
1022 if (lp_clk_div == 0 || lp_clk_div > dsi.lpdiv_max)
1025 dsi_fclk = dsi_fclk_rate();
1027 lp_clk = dsi_fclk / 2 / lp_clk_div;
1029 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
1030 dsi.current_cinfo.lp_clk = lp_clk;
1031 dsi.current_cinfo.lp_clk_div = lp_clk_div;
1033 REG_FLD_MOD(DSI_CLK_CTRL, lp_clk_div, 12, 0); /* LP_CLK_DIVISOR */
1035 REG_FLD_MOD(DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0,
1036 21, 21); /* LP_RX_SYNCHRO_ENABLE */
1042 enum dsi_pll_power_state {
1043 DSI_PLL_POWER_OFF = 0x0,
1044 DSI_PLL_POWER_ON_HSCLK = 0x1,
1045 DSI_PLL_POWER_ON_ALL = 0x2,
1046 DSI_PLL_POWER_ON_DIV = 0x3,
1049 static int dsi_pll_power(enum dsi_pll_power_state state)
1053 REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30); /* PLL_PWR_CMD */
1055 /* PLL_PWR_STATUS */
1056 while (FLD_GET(dsi_read_reg(DSI_CLK_CTRL), 29, 28) != state) {
1058 DSSERR("Failed to set DSI PLL power mode to %d\n",
1068 /* calculate clock rates using dividers in cinfo */
1069 static int dsi_calc_clock_rates(struct omap_dss_device *dssdev,
1070 struct dsi_clock_info *cinfo)
1072 if (cinfo->regn == 0 || cinfo->regn > dsi.regn_max)
1075 if (cinfo->regm == 0 || cinfo->regm > dsi.regm_max)
1078 if (cinfo->regm_dispc > dsi.regm_dispc_max)
1081 if (cinfo->regm_dsi > dsi.regm_dsi_max)
1084 if (cinfo->use_sys_clk) {
1085 cinfo->clkin = dss_clk_get_rate(DSS_CLK_SYSCK);
1086 /* XXX it is unclear if highfreq should be used
1087 * with DSS_SYS_CLK source also */
1088 cinfo->highfreq = 0;
1090 cinfo->clkin = dispc_pclk_rate(dssdev->manager->id);
1092 if (cinfo->clkin < 32000000)
1093 cinfo->highfreq = 0;
1095 cinfo->highfreq = 1;
1098 cinfo->fint = cinfo->clkin / (cinfo->regn * (cinfo->highfreq ? 2 : 1));
1100 if (cinfo->fint > dsi.fint_max || cinfo->fint < dsi.fint_min)
1103 cinfo->clkin4ddr = 2 * cinfo->regm * cinfo->fint;
1105 if (cinfo->clkin4ddr > 1800 * 1000 * 1000)
1108 if (cinfo->regm_dispc > 0)
1109 cinfo->dsi_pll_hsdiv_dispc_clk =
1110 cinfo->clkin4ddr / cinfo->regm_dispc;
1112 cinfo->dsi_pll_hsdiv_dispc_clk = 0;
1114 if (cinfo->regm_dsi > 0)
1115 cinfo->dsi_pll_hsdiv_dsi_clk =
1116 cinfo->clkin4ddr / cinfo->regm_dsi;
1118 cinfo->dsi_pll_hsdiv_dsi_clk = 0;
1123 int dsi_pll_calc_clock_div_pck(bool is_tft, unsigned long req_pck,
1124 struct dsi_clock_info *dsi_cinfo,
1125 struct dispc_clock_info *dispc_cinfo)
1127 struct dsi_clock_info cur, best;
1128 struct dispc_clock_info best_dispc;
1129 int min_fck_per_pck;
1131 unsigned long dss_sys_clk, max_dss_fck;
1133 dss_sys_clk = dss_clk_get_rate(DSS_CLK_SYSCK);
1135 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
1137 if (req_pck == dsi.cache_req_pck &&
1138 dsi.cache_cinfo.clkin == dss_sys_clk) {
1139 DSSDBG("DSI clock info found from cache\n");
1140 *dsi_cinfo = dsi.cache_cinfo;
1141 dispc_find_clk_divs(is_tft, req_pck,
1142 dsi_cinfo->dsi_pll_hsdiv_dispc_clk, dispc_cinfo);
1146 min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK;
1148 if (min_fck_per_pck &&
1149 req_pck * min_fck_per_pck > max_dss_fck) {
1150 DSSERR("Requested pixel clock not possible with the current "
1151 "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning "
1152 "the constraint off.\n");
1153 min_fck_per_pck = 0;
1156 DSSDBG("dsi_pll_calc\n");
1159 memset(&best, 0, sizeof(best));
1160 memset(&best_dispc, 0, sizeof(best_dispc));
1162 memset(&cur, 0, sizeof(cur));
1163 cur.clkin = dss_sys_clk;
1164 cur.use_sys_clk = 1;
1167 /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */
1168 /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */
1169 /* To reduce PLL lock time, keep Fint high (around 2 MHz) */
1170 for (cur.regn = 1; cur.regn < dsi.regn_max; ++cur.regn) {
1171 if (cur.highfreq == 0)
1172 cur.fint = cur.clkin / cur.regn;
1174 cur.fint = cur.clkin / (2 * cur.regn);
1176 if (cur.fint > dsi.fint_max || cur.fint < dsi.fint_min)
1179 /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */
1180 for (cur.regm = 1; cur.regm < dsi.regm_max; ++cur.regm) {
1183 a = 2 * cur.regm * (cur.clkin/1000);
1184 b = cur.regn * (cur.highfreq + 1);
1185 cur.clkin4ddr = a / b * 1000;
1187 if (cur.clkin4ddr > 1800 * 1000 * 1000)
1190 /* dsi_pll_hsdiv_dispc_clk(MHz) =
1191 * DSIPHY(MHz) / regm_dispc < 173MHz/186Mhz */
1192 for (cur.regm_dispc = 1; cur.regm_dispc < dsi.regm_dispc_max;
1194 struct dispc_clock_info cur_dispc;
1195 cur.dsi_pll_hsdiv_dispc_clk =
1196 cur.clkin4ddr / cur.regm_dispc;
1198 /* this will narrow down the search a bit,
1199 * but still give pixclocks below what was
1201 if (cur.dsi_pll_hsdiv_dispc_clk < req_pck)
1204 if (cur.dsi_pll_hsdiv_dispc_clk > max_dss_fck)
1207 if (min_fck_per_pck &&
1208 cur.dsi_pll_hsdiv_dispc_clk <
1209 req_pck * min_fck_per_pck)
1214 dispc_find_clk_divs(is_tft, req_pck,
1215 cur.dsi_pll_hsdiv_dispc_clk,
1218 if (abs(cur_dispc.pck - req_pck) <
1219 abs(best_dispc.pck - req_pck)) {
1221 best_dispc = cur_dispc;
1223 if (cur_dispc.pck == req_pck)
1231 if (min_fck_per_pck) {
1232 DSSERR("Could not find suitable clock settings.\n"
1233 "Turning FCK/PCK constraint off and"
1235 min_fck_per_pck = 0;
1239 DSSERR("Could not find suitable clock settings.\n");
1244 /* dsi_pll_hsdiv_dsi_clk (regm_dsi) is not used */
1246 best.dsi_pll_hsdiv_dsi_clk = 0;
1251 *dispc_cinfo = best_dispc;
1253 dsi.cache_req_pck = req_pck;
1254 dsi.cache_clk_freq = 0;
1255 dsi.cache_cinfo = best;
1260 int dsi_pll_set_clock_div(struct dsi_clock_info *cinfo)
1265 u8 regn_start, regn_end, regm_start, regm_end;
1266 u8 regm_dispc_start, regm_dispc_end, regm_dsi_start, regm_dsi_end;
1270 dsi.current_cinfo.fint = cinfo->fint;
1271 dsi.current_cinfo.clkin4ddr = cinfo->clkin4ddr;
1272 dsi.current_cinfo.dsi_pll_hsdiv_dispc_clk =
1273 cinfo->dsi_pll_hsdiv_dispc_clk;
1274 dsi.current_cinfo.dsi_pll_hsdiv_dsi_clk =
1275 cinfo->dsi_pll_hsdiv_dsi_clk;
1277 dsi.current_cinfo.regn = cinfo->regn;
1278 dsi.current_cinfo.regm = cinfo->regm;
1279 dsi.current_cinfo.regm_dispc = cinfo->regm_dispc;
1280 dsi.current_cinfo.regm_dsi = cinfo->regm_dsi;
1282 DSSDBG("DSI Fint %ld\n", cinfo->fint);
1284 DSSDBG("clkin (%s) rate %ld, highfreq %d\n",
1285 cinfo->use_sys_clk ? "dss_sys_clk" : "pclkfree",
1289 /* DSIPHY == CLKIN4DDR */
1290 DSSDBG("CLKIN4DDR = 2 * %d / %d * %lu / %d = %lu\n",
1294 cinfo->highfreq + 1,
1297 DSSDBG("Data rate on 1 DSI lane %ld Mbps\n",
1298 cinfo->clkin4ddr / 1000 / 1000 / 2);
1300 DSSDBG("Clock lane freq %ld Hz\n", cinfo->clkin4ddr / 4);
1302 DSSDBG("regm_dispc = %d, %s (%s) = %lu\n", cinfo->regm_dispc,
1303 dss_get_generic_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1304 dss_feat_get_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1305 cinfo->dsi_pll_hsdiv_dispc_clk);
1306 DSSDBG("regm_dsi = %d, %s (%s) = %lu\n", cinfo->regm_dsi,
1307 dss_get_generic_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1308 dss_feat_get_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1309 cinfo->dsi_pll_hsdiv_dsi_clk);
1311 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGN, ®n_start, ®n_end);
1312 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM, ®m_start, ®m_end);
1313 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM_DISPC, ®m_dispc_start,
1315 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM_DSI, ®m_dsi_start,
1318 REG_FLD_MOD(DSI_PLL_CONTROL, 0, 0, 0); /* DSI_PLL_AUTOMODE = manual */
1320 l = dsi_read_reg(DSI_PLL_CONFIGURATION1);
1321 l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */
1323 l = FLD_MOD(l, cinfo->regn - 1, regn_start, regn_end);
1325 l = FLD_MOD(l, cinfo->regm, regm_start, regm_end);
1327 l = FLD_MOD(l, cinfo->regm_dispc > 0 ? cinfo->regm_dispc - 1 : 0,
1328 regm_dispc_start, regm_dispc_end);
1329 /* DSIPROTO_CLOCK_DIV */
1330 l = FLD_MOD(l, cinfo->regm_dsi > 0 ? cinfo->regm_dsi - 1 : 0,
1331 regm_dsi_start, regm_dsi_end);
1332 dsi_write_reg(DSI_PLL_CONFIGURATION1, l);
1334 BUG_ON(cinfo->fint < dsi.fint_min || cinfo->fint > dsi.fint_max);
1335 if (cinfo->fint < 1000000)
1337 else if (cinfo->fint < 1250000)
1339 else if (cinfo->fint < 1500000)
1341 else if (cinfo->fint < 1750000)
1346 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1347 l = FLD_MOD(l, f, 4, 1); /* DSI_PLL_FREQSEL */
1348 l = FLD_MOD(l, cinfo->use_sys_clk ? 0 : 1,
1349 11, 11); /* DSI_PLL_CLKSEL */
1350 l = FLD_MOD(l, cinfo->highfreq,
1351 12, 12); /* DSI_PLL_HIGHFREQ */
1352 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1353 l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */
1354 l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */
1355 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1357 REG_FLD_MOD(DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */
1359 if (wait_for_bit_change(DSI_PLL_GO, 0, 0) != 0) {
1360 DSSERR("dsi pll go bit not going down.\n");
1365 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) {
1366 DSSERR("cannot lock PLL\n");
1373 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1374 l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */
1375 l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */
1376 l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */
1377 l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */
1378 l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */
1379 l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */
1380 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1381 l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */
1382 l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */
1383 l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */
1384 l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */
1385 l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */
1386 l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */
1387 l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */
1388 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1390 DSSDBG("PLL config done\n");
1395 int dsi_pll_init(struct omap_dss_device *dssdev, bool enable_hsclk,
1399 enum dsi_pll_power_state pwstate;
1401 DSSDBG("PLL init\n");
1403 #ifdef CONFIG_OMAP2_DSS_USE_DSI_PLL
1405 * HACK: this is just a quick hack to get the USE_DSI_PLL
1406 * option working. USE_DSI_PLL is itself a big hack, and
1407 * should be removed.
1409 if (dsi.vdds_dsi_reg == NULL) {
1410 struct regulator *vdds_dsi;
1412 vdds_dsi = regulator_get(&dsi.pdev->dev, "vdds_dsi");
1414 if (IS_ERR(vdds_dsi)) {
1415 DSSERR("can't get VDDS_DSI regulator\n");
1416 return PTR_ERR(vdds_dsi);
1419 dsi.vdds_dsi_reg = vdds_dsi;
1424 dsi_enable_pll_clock(1);
1426 r = regulator_enable(dsi.vdds_dsi_reg);
1430 /* XXX PLL does not come out of reset without this... */
1431 dispc_pck_free_enable(1);
1433 if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) {
1434 DSSERR("PLL not coming out of reset.\n");
1436 dispc_pck_free_enable(0);
1440 /* XXX ... but if left on, we get problems when planes do not
1441 * fill the whole display. No idea about this */
1442 dispc_pck_free_enable(0);
1444 if (enable_hsclk && enable_hsdiv)
1445 pwstate = DSI_PLL_POWER_ON_ALL;
1446 else if (enable_hsclk)
1447 pwstate = DSI_PLL_POWER_ON_HSCLK;
1448 else if (enable_hsdiv)
1449 pwstate = DSI_PLL_POWER_ON_DIV;
1451 pwstate = DSI_PLL_POWER_OFF;
1453 r = dsi_pll_power(pwstate);
1458 DSSDBG("PLL init done\n");
1462 regulator_disable(dsi.vdds_dsi_reg);
1465 dsi_enable_pll_clock(0);
1469 void dsi_pll_uninit(void)
1472 dsi_enable_pll_clock(0);
1475 dsi_pll_power(DSI_PLL_POWER_OFF);
1476 regulator_disable(dsi.vdds_dsi_reg);
1477 DSSDBG("PLL uninit done\n");
1480 void dsi_dump_clocks(struct seq_file *s)
1483 struct dsi_clock_info *cinfo = &dsi.current_cinfo;
1484 enum dss_clk_source dispc_clk_src, dsi_clk_src;
1486 dispc_clk_src = dss_get_dispc_clk_source();
1487 dsi_clk_src = dss_get_dsi_clk_source();
1491 clksel = REG_GET(DSI_PLL_CONFIGURATION2, 11, 11);
1493 seq_printf(s, "- DSI PLL -\n");
1495 seq_printf(s, "dsi pll source = %s\n",
1497 "dss_sys_clk" : "pclkfree");
1499 seq_printf(s, "Fint\t\t%-16luregn %u\n", cinfo->fint, cinfo->regn);
1501 seq_printf(s, "CLKIN4DDR\t%-16luregm %u\n",
1502 cinfo->clkin4ddr, cinfo->regm);
1504 seq_printf(s, "%s (%s)\t%-16luregm_dispc %u\t(%s)\n",
1505 dss_get_generic_clk_source_name(dispc_clk_src),
1506 dss_feat_get_clk_source_name(dispc_clk_src),
1507 cinfo->dsi_pll_hsdiv_dispc_clk,
1509 dispc_clk_src == DSS_CLK_SRC_FCK ?
1512 seq_printf(s, "%s (%s)\t%-16luregm_dsi %u\t(%s)\n",
1513 dss_get_generic_clk_source_name(dsi_clk_src),
1514 dss_feat_get_clk_source_name(dsi_clk_src),
1515 cinfo->dsi_pll_hsdiv_dsi_clk,
1517 dsi_clk_src == DSS_CLK_SRC_FCK ?
1520 seq_printf(s, "- DSI -\n");
1522 seq_printf(s, "dsi fclk source = %s (%s)\n",
1523 dss_get_generic_clk_source_name(dsi_clk_src),
1524 dss_feat_get_clk_source_name(dsi_clk_src));
1526 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate());
1528 seq_printf(s, "DDR_CLK\t\t%lu\n",
1529 cinfo->clkin4ddr / 4);
1531 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs());
1533 seq_printf(s, "LP_CLK\t\t%lu\n", cinfo->lp_clk);
1535 seq_printf(s, "VP_CLK\t\t%lu\n"
1537 dispc_lclk_rate(OMAP_DSS_CHANNEL_LCD),
1538 dispc_pclk_rate(OMAP_DSS_CHANNEL_LCD));
1543 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
1544 void dsi_dump_irqs(struct seq_file *s)
1546 unsigned long flags;
1547 struct dsi_irq_stats stats;
1549 spin_lock_irqsave(&dsi.irq_stats_lock, flags);
1551 stats = dsi.irq_stats;
1552 memset(&dsi.irq_stats, 0, sizeof(dsi.irq_stats));
1553 dsi.irq_stats.last_reset = jiffies;
1555 spin_unlock_irqrestore(&dsi.irq_stats_lock, flags);
1557 seq_printf(s, "period %u ms\n",
1558 jiffies_to_msecs(jiffies - stats.last_reset));
1560 seq_printf(s, "irqs %d\n", stats.irq_count);
1562 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1564 seq_printf(s, "-- DSI interrupts --\n");
1580 PIS(LDO_POWER_GOOD);
1585 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1586 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1587 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1588 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1589 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1591 seq_printf(s, "-- VC interrupts --\n");
1600 PIS(PP_BUSY_CHANGE);
1604 seq_printf(s, "%-20s %10d\n", #x, \
1605 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1607 seq_printf(s, "-- CIO interrupts --\n");
1620 PIS(ERRCONTENTIONLP0_1);
1621 PIS(ERRCONTENTIONLP1_1);
1622 PIS(ERRCONTENTIONLP0_2);
1623 PIS(ERRCONTENTIONLP1_2);
1624 PIS(ERRCONTENTIONLP0_3);
1625 PIS(ERRCONTENTIONLP1_3);
1626 PIS(ULPSACTIVENOT_ALL0);
1627 PIS(ULPSACTIVENOT_ALL1);
1632 void dsi_dump_regs(struct seq_file *s)
1634 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r))
1636 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
1638 DUMPREG(DSI_REVISION);
1639 DUMPREG(DSI_SYSCONFIG);
1640 DUMPREG(DSI_SYSSTATUS);
1641 DUMPREG(DSI_IRQSTATUS);
1642 DUMPREG(DSI_IRQENABLE);
1644 DUMPREG(DSI_COMPLEXIO_CFG1);
1645 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1646 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1647 DUMPREG(DSI_CLK_CTRL);
1648 DUMPREG(DSI_TIMING1);
1649 DUMPREG(DSI_TIMING2);
1650 DUMPREG(DSI_VM_TIMING1);
1651 DUMPREG(DSI_VM_TIMING2);
1652 DUMPREG(DSI_VM_TIMING3);
1653 DUMPREG(DSI_CLK_TIMING);
1654 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1655 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1656 DUMPREG(DSI_COMPLEXIO_CFG2);
1657 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1658 DUMPREG(DSI_VM_TIMING4);
1659 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1660 DUMPREG(DSI_VM_TIMING5);
1661 DUMPREG(DSI_VM_TIMING6);
1662 DUMPREG(DSI_VM_TIMING7);
1663 DUMPREG(DSI_STOPCLK_TIMING);
1665 DUMPREG(DSI_VC_CTRL(0));
1666 DUMPREG(DSI_VC_TE(0));
1667 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1668 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1669 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1670 DUMPREG(DSI_VC_IRQSTATUS(0));
1671 DUMPREG(DSI_VC_IRQENABLE(0));
1673 DUMPREG(DSI_VC_CTRL(1));
1674 DUMPREG(DSI_VC_TE(1));
1675 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1676 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1677 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1678 DUMPREG(DSI_VC_IRQSTATUS(1));
1679 DUMPREG(DSI_VC_IRQENABLE(1));
1681 DUMPREG(DSI_VC_CTRL(2));
1682 DUMPREG(DSI_VC_TE(2));
1683 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1684 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1685 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1686 DUMPREG(DSI_VC_IRQSTATUS(2));
1687 DUMPREG(DSI_VC_IRQENABLE(2));
1689 DUMPREG(DSI_VC_CTRL(3));
1690 DUMPREG(DSI_VC_TE(3));
1691 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1692 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1693 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1694 DUMPREG(DSI_VC_IRQSTATUS(3));
1695 DUMPREG(DSI_VC_IRQENABLE(3));
1697 DUMPREG(DSI_DSIPHY_CFG0);
1698 DUMPREG(DSI_DSIPHY_CFG1);
1699 DUMPREG(DSI_DSIPHY_CFG2);
1700 DUMPREG(DSI_DSIPHY_CFG5);
1702 DUMPREG(DSI_PLL_CONTROL);
1703 DUMPREG(DSI_PLL_STATUS);
1704 DUMPREG(DSI_PLL_GO);
1705 DUMPREG(DSI_PLL_CONFIGURATION1);
1706 DUMPREG(DSI_PLL_CONFIGURATION2);
1708 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
1712 enum dsi_complexio_power_state {
1713 DSI_COMPLEXIO_POWER_OFF = 0x0,
1714 DSI_COMPLEXIO_POWER_ON = 0x1,
1715 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1718 static int dsi_complexio_power(enum dsi_complexio_power_state state)
1723 REG_FLD_MOD(DSI_COMPLEXIO_CFG1, state, 28, 27);
1726 while (FLD_GET(dsi_read_reg(DSI_COMPLEXIO_CFG1), 26, 25) != state) {
1728 DSSERR("failed to set complexio power state to "
1738 static void dsi_complexio_config(struct omap_dss_device *dssdev)
1742 int clk_lane = dssdev->phy.dsi.clk_lane;
1743 int data1_lane = dssdev->phy.dsi.data1_lane;
1744 int data2_lane = dssdev->phy.dsi.data2_lane;
1745 int clk_pol = dssdev->phy.dsi.clk_pol;
1746 int data1_pol = dssdev->phy.dsi.data1_pol;
1747 int data2_pol = dssdev->phy.dsi.data2_pol;
1749 r = dsi_read_reg(DSI_COMPLEXIO_CFG1);
1750 r = FLD_MOD(r, clk_lane, 2, 0);
1751 r = FLD_MOD(r, clk_pol, 3, 3);
1752 r = FLD_MOD(r, data1_lane, 6, 4);
1753 r = FLD_MOD(r, data1_pol, 7, 7);
1754 r = FLD_MOD(r, data2_lane, 10, 8);
1755 r = FLD_MOD(r, data2_pol, 11, 11);
1756 dsi_write_reg(DSI_COMPLEXIO_CFG1, r);
1758 /* The configuration of the DSI complex I/O (number of data lanes,
1759 position, differential order) should not be changed while
1760 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for
1761 the hardware to take into account a new configuration of the complex
1762 I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to
1763 follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1,
1764 then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set
1765 DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the
1766 DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the
1767 DSI complex I/O configuration is unknown. */
1770 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1771 REG_FLD_MOD(DSI_CTRL, 0, 0, 0);
1772 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20);
1773 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1777 static inline unsigned ns2ddr(unsigned ns)
1779 /* convert time in ns to ddr ticks, rounding up */
1780 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1781 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1784 static inline unsigned ddr2ns(unsigned ddr)
1786 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1787 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1790 static void dsi_complexio_timings(void)
1793 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1794 u32 tlpx_half, tclk_trail, tclk_zero;
1797 /* calculate timings */
1799 /* 1 * DDR_CLK = 2 * UI */
1801 /* min 40ns + 4*UI max 85ns + 6*UI */
1802 ths_prepare = ns2ddr(70) + 2;
1804 /* min 145ns + 10*UI */
1805 ths_prepare_ths_zero = ns2ddr(175) + 2;
1807 /* min max(8*UI, 60ns+4*UI) */
1808 ths_trail = ns2ddr(60) + 5;
1811 ths_exit = ns2ddr(145);
1814 tlpx_half = ns2ddr(25);
1817 tclk_trail = ns2ddr(60) + 2;
1819 /* min 38ns, max 95ns */
1820 tclk_prepare = ns2ddr(65);
1822 /* min tclk-prepare + tclk-zero = 300ns */
1823 tclk_zero = ns2ddr(260);
1825 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1826 ths_prepare, ddr2ns(ths_prepare),
1827 ths_prepare_ths_zero, ddr2ns(ths_prepare_ths_zero));
1828 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1829 ths_trail, ddr2ns(ths_trail),
1830 ths_exit, ddr2ns(ths_exit));
1832 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1833 "tclk_zero %u (%uns)\n",
1834 tlpx_half, ddr2ns(tlpx_half),
1835 tclk_trail, ddr2ns(tclk_trail),
1836 tclk_zero, ddr2ns(tclk_zero));
1837 DSSDBG("tclk_prepare %u (%uns)\n",
1838 tclk_prepare, ddr2ns(tclk_prepare));
1840 /* program timings */
1842 r = dsi_read_reg(DSI_DSIPHY_CFG0);
1843 r = FLD_MOD(r, ths_prepare, 31, 24);
1844 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1845 r = FLD_MOD(r, ths_trail, 15, 8);
1846 r = FLD_MOD(r, ths_exit, 7, 0);
1847 dsi_write_reg(DSI_DSIPHY_CFG0, r);
1849 r = dsi_read_reg(DSI_DSIPHY_CFG1);
1850 r = FLD_MOD(r, tlpx_half, 22, 16);
1851 r = FLD_MOD(r, tclk_trail, 15, 8);
1852 r = FLD_MOD(r, tclk_zero, 7, 0);
1853 dsi_write_reg(DSI_DSIPHY_CFG1, r);
1855 r = dsi_read_reg(DSI_DSIPHY_CFG2);
1856 r = FLD_MOD(r, tclk_prepare, 7, 0);
1857 dsi_write_reg(DSI_DSIPHY_CFG2, r);
1861 static int dsi_complexio_init(struct omap_dss_device *dssdev)
1865 DSSDBG("dsi_complexio_init\n");
1867 /* CIO_CLK_ICG, enable L3 clk to CIO */
1868 REG_FLD_MOD(DSI_CLK_CTRL, 1, 14, 14);
1870 /* A dummy read using the SCP interface to any DSIPHY register is
1871 * required after DSIPHY reset to complete the reset of the DSI complex
1873 dsi_read_reg(DSI_DSIPHY_CFG5);
1875 if (wait_for_bit_change(DSI_DSIPHY_CFG5, 30, 1) != 1) {
1876 DSSERR("ComplexIO PHY not coming out of reset.\n");
1881 dsi_complexio_config(dssdev);
1883 r = dsi_complexio_power(DSI_COMPLEXIO_POWER_ON);
1888 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
1889 DSSERR("ComplexIO not coming out of reset.\n");
1894 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 21, 1) != 1) {
1895 DSSERR("ComplexIO LDO power down.\n");
1900 dsi_complexio_timings();
1903 The configuration of the DSI complex I/O (number of data lanes,
1904 position, differential order) should not be changed while
1905 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. For the
1906 hardware to recognize a new configuration of the complex I/O (done
1907 in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to follow
1908 this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1, next
1909 reset the DSS.DSI_CTRL[0] IF_EN to 0, then set DSS.DSI_CLK_CTRL[20]
1910 LP_CLK_ENABLE to 1, and finally, set again the DSS.DSI_CTRL[0] IF_EN
1911 bit to 1. If the sequence is not followed, the DSi complex I/O
1912 configuration is undetermined.
1916 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
1920 DSSDBG("CIO init done\n");
1925 static void dsi_complexio_uninit(void)
1927 dsi_complexio_power(DSI_COMPLEXIO_POWER_OFF);
1930 static int _dsi_wait_reset(void)
1934 while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) {
1936 DSSERR("soft reset failed\n");
1945 static int _dsi_reset(void)
1948 REG_FLD_MOD(DSI_SYSCONFIG, 1, 1, 1);
1949 return _dsi_wait_reset();
1952 static void dsi_config_tx_fifo(enum fifo_size size1, enum fifo_size size2,
1953 enum fifo_size size3, enum fifo_size size4)
1959 dsi.vc[0].fifo_size = size1;
1960 dsi.vc[1].fifo_size = size2;
1961 dsi.vc[2].fifo_size = size3;
1962 dsi.vc[3].fifo_size = size4;
1964 for (i = 0; i < 4; i++) {
1966 int size = dsi.vc[i].fifo_size;
1968 if (add + size > 4) {
1969 DSSERR("Illegal FIFO configuration\n");
1973 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
1975 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
1979 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, r);
1982 static void dsi_config_rx_fifo(enum fifo_size size1, enum fifo_size size2,
1983 enum fifo_size size3, enum fifo_size size4)
1989 dsi.vc[0].fifo_size = size1;
1990 dsi.vc[1].fifo_size = size2;
1991 dsi.vc[2].fifo_size = size3;
1992 dsi.vc[3].fifo_size = size4;
1994 for (i = 0; i < 4; i++) {
1996 int size = dsi.vc[i].fifo_size;
1998 if (add + size > 4) {
1999 DSSERR("Illegal FIFO configuration\n");
2003 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2005 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
2009 dsi_write_reg(DSI_RX_FIFO_VC_SIZE, r);
2012 static int dsi_force_tx_stop_mode_io(void)
2016 r = dsi_read_reg(DSI_TIMING1);
2017 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2018 dsi_write_reg(DSI_TIMING1, r);
2020 if (wait_for_bit_change(DSI_TIMING1, 15, 0) != 0) {
2021 DSSERR("TX_STOP bit not going down\n");
2028 static int dsi_vc_enable(int channel, bool enable)
2030 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
2033 enable = enable ? 1 : 0;
2035 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 0, 0);
2037 if (wait_for_bit_change(DSI_VC_CTRL(channel), 0, enable) != enable) {
2038 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
2045 static void dsi_vc_initial_config(int channel)
2049 DSSDBGF("%d", channel);
2051 r = dsi_read_reg(DSI_VC_CTRL(channel));
2053 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
2054 DSSERR("VC(%d) busy when trying to configure it!\n",
2057 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
2058 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
2059 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
2060 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
2061 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
2062 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
2063 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
2065 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
2066 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
2068 dsi_write_reg(DSI_VC_CTRL(channel), r);
2071 static int dsi_vc_config_l4(int channel)
2073 if (dsi.vc[channel].mode == DSI_VC_MODE_L4)
2076 DSSDBGF("%d", channel);
2078 dsi_vc_enable(channel, 0);
2081 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
2082 DSSERR("vc(%d) busy when trying to config for L4\n", channel);
2086 REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */
2088 dsi_vc_enable(channel, 1);
2090 dsi.vc[channel].mode = DSI_VC_MODE_L4;
2095 static int dsi_vc_config_vp(int channel)
2097 if (dsi.vc[channel].mode == DSI_VC_MODE_VP)
2100 DSSDBGF("%d", channel);
2102 dsi_vc_enable(channel, 0);
2105 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
2106 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
2110 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 1, 1); /* SOURCE, 1 = video port */
2112 dsi_vc_enable(channel, 1);
2114 dsi.vc[channel].mode = DSI_VC_MODE_VP;
2120 void omapdss_dsi_vc_enable_hs(int channel, bool enable)
2122 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
2124 WARN_ON(!dsi_bus_is_locked());
2126 dsi_vc_enable(channel, 0);
2129 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 9, 9);
2131 dsi_vc_enable(channel, 1);
2134 dsi_force_tx_stop_mode_io();
2136 EXPORT_SYMBOL(omapdss_dsi_vc_enable_hs);
2138 static void dsi_vc_flush_long_data(int channel)
2140 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2142 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2143 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
2147 (val >> 24) & 0xff);
2151 static void dsi_show_rx_ack_with_err(u16 err)
2153 DSSERR("\tACK with ERROR (%#x):\n", err);
2155 DSSERR("\t\tSoT Error\n");
2157 DSSERR("\t\tSoT Sync Error\n");
2159 DSSERR("\t\tEoT Sync Error\n");
2161 DSSERR("\t\tEscape Mode Entry Command Error\n");
2163 DSSERR("\t\tLP Transmit Sync Error\n");
2165 DSSERR("\t\tHS Receive Timeout Error\n");
2167 DSSERR("\t\tFalse Control Error\n");
2169 DSSERR("\t\t(reserved7)\n");
2171 DSSERR("\t\tECC Error, single-bit (corrected)\n");
2173 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
2174 if (err & (1 << 10))
2175 DSSERR("\t\tChecksum Error\n");
2176 if (err & (1 << 11))
2177 DSSERR("\t\tData type not recognized\n");
2178 if (err & (1 << 12))
2179 DSSERR("\t\tInvalid VC ID\n");
2180 if (err & (1 << 13))
2181 DSSERR("\t\tInvalid Transmission Length\n");
2182 if (err & (1 << 14))
2183 DSSERR("\t\t(reserved14)\n");
2184 if (err & (1 << 15))
2185 DSSERR("\t\tDSI Protocol Violation\n");
2188 static u16 dsi_vc_flush_receive_data(int channel)
2190 /* RX_FIFO_NOT_EMPTY */
2191 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2194 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2195 DSSERR("\trawval %#08x\n", val);
2196 dt = FLD_GET(val, 5, 0);
2197 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2198 u16 err = FLD_GET(val, 23, 8);
2199 dsi_show_rx_ack_with_err(err);
2200 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2201 DSSERR("\tDCS short response, 1 byte: %#x\n",
2202 FLD_GET(val, 23, 8));
2203 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2204 DSSERR("\tDCS short response, 2 byte: %#x\n",
2205 FLD_GET(val, 23, 8));
2206 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2207 DSSERR("\tDCS long response, len %d\n",
2208 FLD_GET(val, 23, 8));
2209 dsi_vc_flush_long_data(channel);
2211 DSSERR("\tunknown datatype 0x%02x\n", dt);
2217 static int dsi_vc_send_bta(int channel)
2219 if (dsi.debug_write || dsi.debug_read)
2220 DSSDBG("dsi_vc_send_bta %d\n", channel);
2222 WARN_ON(!dsi_bus_is_locked());
2224 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2225 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
2226 dsi_vc_flush_receive_data(channel);
2229 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
2234 int dsi_vc_send_bta_sync(int channel)
2236 DECLARE_COMPLETION_ONSTACK(completion);
2240 r = dsi_register_isr_vc(channel, dsi_completion_handler,
2241 &completion, DSI_VC_IRQ_BTA);
2245 r = dsi_vc_send_bta(channel);
2249 if (wait_for_completion_timeout(&completion,
2250 msecs_to_jiffies(500)) == 0) {
2251 DSSERR("Failed to receive BTA\n");
2256 err = dsi_get_errors();
2258 DSSERR("Error while sending BTA: %x\n", err);
2264 dsi_unregister_isr_vc(channel, dsi_completion_handler,
2265 &completion, DSI_VC_IRQ_BTA);
2269 EXPORT_SYMBOL(dsi_vc_send_bta_sync);
2271 static inline void dsi_vc_write_long_header(int channel, u8 data_type,
2277 WARN_ON(!dsi_bus_is_locked());
2279 data_id = data_type | dsi.vc[channel].vc_id << 6;
2281 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
2282 FLD_VAL(ecc, 31, 24);
2284 dsi_write_reg(DSI_VC_LONG_PACKET_HEADER(channel), val);
2287 static inline void dsi_vc_write_long_payload(int channel,
2288 u8 b1, u8 b2, u8 b3, u8 b4)
2292 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
2294 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
2295 b1, b2, b3, b4, val); */
2297 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
2300 static int dsi_vc_send_long(int channel, u8 data_type, u8 *data, u16 len,
2309 if (dsi.debug_write)
2310 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
2313 if (dsi.vc[channel].fifo_size * 32 * 4 < len + 4) {
2314 DSSERR("unable to send long packet: packet too long.\n");
2318 dsi_vc_config_l4(channel);
2320 dsi_vc_write_long_header(channel, data_type, len, ecc);
2323 for (i = 0; i < len >> 2; i++) {
2324 if (dsi.debug_write)
2325 DSSDBG("\tsending full packet %d\n", i);
2332 dsi_vc_write_long_payload(channel, b1, b2, b3, b4);
2337 b1 = 0; b2 = 0; b3 = 0;
2339 if (dsi.debug_write)
2340 DSSDBG("\tsending remainder bytes %d\n", i);
2357 dsi_vc_write_long_payload(channel, b1, b2, b3, 0);
2363 static int dsi_vc_send_short(int channel, u8 data_type, u16 data, u8 ecc)
2368 WARN_ON(!dsi_bus_is_locked());
2370 if (dsi.debug_write)
2371 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2373 data_type, data & 0xff, (data >> 8) & 0xff);
2375 dsi_vc_config_l4(channel);
2377 if (FLD_GET(dsi_read_reg(DSI_VC_CTRL(channel)), 16, 16)) {
2378 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2382 data_id = data_type | dsi.vc[channel].vc_id << 6;
2384 r = (data_id << 0) | (data << 8) | (ecc << 24);
2386 dsi_write_reg(DSI_VC_SHORT_PACKET_HEADER(channel), r);
2391 int dsi_vc_send_null(int channel)
2393 u8 nullpkg[] = {0, 0, 0, 0};
2394 return dsi_vc_send_long(channel, DSI_DT_NULL_PACKET, nullpkg, 4, 0);
2396 EXPORT_SYMBOL(dsi_vc_send_null);
2398 int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len)
2405 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_0,
2407 } else if (len == 2) {
2408 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_1,
2409 data[0] | (data[1] << 8), 0);
2411 /* 0x39 = DCS Long Write */
2412 r = dsi_vc_send_long(channel, DSI_DT_DCS_LONG_WRITE,
2418 EXPORT_SYMBOL(dsi_vc_dcs_write_nosync);
2420 int dsi_vc_dcs_write(int channel, u8 *data, int len)
2424 r = dsi_vc_dcs_write_nosync(channel, data, len);
2428 r = dsi_vc_send_bta_sync(channel);
2432 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2433 DSSERR("rx fifo not empty after write, dumping data:\n");
2434 dsi_vc_flush_receive_data(channel);
2441 DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
2442 channel, data[0], len);
2445 EXPORT_SYMBOL(dsi_vc_dcs_write);
2447 int dsi_vc_dcs_write_0(int channel, u8 dcs_cmd)
2449 return dsi_vc_dcs_write(channel, &dcs_cmd, 1);
2451 EXPORT_SYMBOL(dsi_vc_dcs_write_0);
2453 int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param)
2458 return dsi_vc_dcs_write(channel, buf, 2);
2460 EXPORT_SYMBOL(dsi_vc_dcs_write_1);
2462 int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
2469 DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %x)\n", channel, dcs_cmd);
2471 r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
2475 r = dsi_vc_send_bta_sync(channel);
2479 /* RX_FIFO_NOT_EMPTY */
2480 if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
2481 DSSERR("RX fifo empty when trying to read.\n");
2486 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2488 DSSDBG("\theader: %08x\n", val);
2489 dt = FLD_GET(val, 5, 0);
2490 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2491 u16 err = FLD_GET(val, 23, 8);
2492 dsi_show_rx_ack_with_err(err);
2496 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2497 u8 data = FLD_GET(val, 15, 8);
2499 DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
2509 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2510 u16 data = FLD_GET(val, 23, 8);
2512 DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
2519 buf[0] = data & 0xff;
2520 buf[1] = (data >> 8) & 0xff;
2523 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2525 int len = FLD_GET(val, 23, 8);
2527 DSSDBG("\tDCS long response, len %d\n", len);
2534 /* two byte checksum ends the packet, not included in len */
2535 for (w = 0; w < len + 2;) {
2537 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2539 DSSDBG("\t\t%02x %02x %02x %02x\n",
2543 (val >> 24) & 0xff);
2545 for (b = 0; b < 4; ++b) {
2547 buf[w] = (val >> (b * 8)) & 0xff;
2548 /* we discard the 2 byte checksum */
2555 DSSERR("\tunknown datatype 0x%02x\n", dt);
2562 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
2567 EXPORT_SYMBOL(dsi_vc_dcs_read);
2569 int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
2573 r = dsi_vc_dcs_read(channel, dcs_cmd, data, 1);
2583 EXPORT_SYMBOL(dsi_vc_dcs_read_1);
2585 int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u8 *data1, u8 *data2)
2590 r = dsi_vc_dcs_read(channel, dcs_cmd, buf, 2);
2603 EXPORT_SYMBOL(dsi_vc_dcs_read_2);
2605 int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
2607 return dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
2610 EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
2612 static void dsi_set_lp_rx_timeout(unsigned ticks, bool x4, bool x16)
2615 unsigned long total_ticks;
2618 BUG_ON(ticks > 0x1fff);
2620 /* ticks in DSI_FCK */
2621 fck = dsi_fclk_rate();
2623 r = dsi_read_reg(DSI_TIMING2);
2624 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
2625 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
2626 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
2627 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
2628 dsi_write_reg(DSI_TIMING2, r);
2630 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2632 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2634 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2635 (total_ticks * 1000) / (fck / 1000 / 1000));
2638 static void dsi_set_ta_timeout(unsigned ticks, bool x8, bool x16)
2641 unsigned long total_ticks;
2644 BUG_ON(ticks > 0x1fff);
2646 /* ticks in DSI_FCK */
2647 fck = dsi_fclk_rate();
2649 r = dsi_read_reg(DSI_TIMING1);
2650 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
2651 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
2652 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
2653 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
2654 dsi_write_reg(DSI_TIMING1, r);
2656 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
2658 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
2660 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
2661 (total_ticks * 1000) / (fck / 1000 / 1000));
2664 static void dsi_set_stop_state_counter(unsigned ticks, bool x4, bool x16)
2667 unsigned long total_ticks;
2670 BUG_ON(ticks > 0x1fff);
2672 /* ticks in DSI_FCK */
2673 fck = dsi_fclk_rate();
2675 r = dsi_read_reg(DSI_TIMING1);
2676 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2677 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
2678 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
2679 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
2680 dsi_write_reg(DSI_TIMING1, r);
2682 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2684 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
2686 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2687 (total_ticks * 1000) / (fck / 1000 / 1000));
2690 static void dsi_set_hs_tx_timeout(unsigned ticks, bool x4, bool x16)
2693 unsigned long total_ticks;
2696 BUG_ON(ticks > 0x1fff);
2698 /* ticks in TxByteClkHS */
2699 fck = dsi_get_txbyteclkhs();
2701 r = dsi_read_reg(DSI_TIMING2);
2702 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
2703 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
2704 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
2705 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
2706 dsi_write_reg(DSI_TIMING2, r);
2708 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2710 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2712 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2713 (total_ticks * 1000) / (fck / 1000 / 1000));
2715 static int dsi_proto_config(struct omap_dss_device *dssdev)
2720 dsi_config_tx_fifo(DSI_FIFO_SIZE_32,
2725 dsi_config_rx_fifo(DSI_FIFO_SIZE_32,
2730 /* XXX what values for the timeouts? */
2731 dsi_set_stop_state_counter(0x1000, false, false);
2732 dsi_set_ta_timeout(0x1fff, true, true);
2733 dsi_set_lp_rx_timeout(0x1fff, true, true);
2734 dsi_set_hs_tx_timeout(0x1fff, true, true);
2736 switch (dssdev->ctrl.pixel_size) {
2750 r = dsi_read_reg(DSI_CTRL);
2751 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
2752 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
2753 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
2754 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
2755 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
2756 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
2757 r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */
2758 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
2759 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
2760 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
2761 r = FLD_MOD(r, 0, 25, 25); /* DCS_CMD_CODE, 1=start, 0=continue */
2763 dsi_write_reg(DSI_CTRL, r);
2765 dsi_vc_initial_config(0);
2766 dsi_vc_initial_config(1);
2767 dsi_vc_initial_config(2);
2768 dsi_vc_initial_config(3);
2773 static void dsi_proto_timings(struct omap_dss_device *dssdev)
2775 unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail;
2776 unsigned tclk_pre, tclk_post;
2777 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
2778 unsigned ths_trail, ths_exit;
2779 unsigned ddr_clk_pre, ddr_clk_post;
2780 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
2784 r = dsi_read_reg(DSI_DSIPHY_CFG0);
2785 ths_prepare = FLD_GET(r, 31, 24);
2786 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
2787 ths_zero = ths_prepare_ths_zero - ths_prepare;
2788 ths_trail = FLD_GET(r, 15, 8);
2789 ths_exit = FLD_GET(r, 7, 0);
2791 r = dsi_read_reg(DSI_DSIPHY_CFG1);
2792 tlpx = FLD_GET(r, 22, 16) * 2;
2793 tclk_trail = FLD_GET(r, 15, 8);
2794 tclk_zero = FLD_GET(r, 7, 0);
2796 r = dsi_read_reg(DSI_DSIPHY_CFG2);
2797 tclk_prepare = FLD_GET(r, 7, 0);
2801 /* min 60ns + 52*UI */
2802 tclk_post = ns2ddr(60) + 26;
2804 /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */
2805 if (dssdev->phy.dsi.data1_lane != 0 &&
2806 dssdev->phy.dsi.data2_lane != 0)
2811 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
2813 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
2815 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
2816 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
2818 r = dsi_read_reg(DSI_CLK_TIMING);
2819 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
2820 r = FLD_MOD(r, ddr_clk_post, 7, 0);
2821 dsi_write_reg(DSI_CLK_TIMING, r);
2823 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
2827 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
2828 DIV_ROUND_UP(ths_prepare, 4) +
2829 DIV_ROUND_UP(ths_zero + 3, 4);
2831 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
2833 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
2834 FLD_VAL(exit_hs_mode_lat, 15, 0);
2835 dsi_write_reg(DSI_VM_TIMING7, r);
2837 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
2838 enter_hs_mode_lat, exit_hs_mode_lat);
2842 #define DSI_DECL_VARS \
2843 int __dsi_cb = 0; u32 __dsi_cv = 0;
2845 #define DSI_FLUSH(ch) \
2846 if (__dsi_cb > 0) { \
2847 /*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \
2848 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \
2849 __dsi_cb = __dsi_cv = 0; \
2852 #define DSI_PUSH(ch, data) \
2854 __dsi_cv |= (data) << (__dsi_cb * 8); \
2855 /*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \
2856 if (++__dsi_cb > 3) \
2860 static int dsi_update_screen_l4(struct omap_dss_device *dssdev,
2861 int x, int y, int w, int h)
2863 /* Note: supports only 24bit colors in 32bit container */
2865 int fifo_stalls = 0;
2866 int max_dsi_packet_size;
2867 int max_data_per_packet;
2868 int max_pixels_per_packet;
2870 int bytespp = dssdev->ctrl.pixel_size / 8;
2876 struct omap_overlay *ovl;
2880 DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n",
2883 ovl = dssdev->manager->overlays[0];
2885 if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U)
2888 if (dssdev->ctrl.pixel_size != 24)
2891 scr_width = ovl->info.screen_width;
2892 data = ovl->info.vaddr;
2894 start_offset = scr_width * y + x;
2895 horiz_inc = scr_width - w;
2898 /* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes
2901 /* When using CPU, max long packet size is TX buffer size */
2902 max_dsi_packet_size = dsi.vc[0].fifo_size * 32 * 4;
2904 /* we seem to get better perf if we divide the tx fifo to half,
2905 and while the other half is being sent, we fill the other half
2906 max_dsi_packet_size /= 2; */
2908 max_data_per_packet = max_dsi_packet_size - 4 - 1;
2910 max_pixels_per_packet = max_data_per_packet / bytespp;
2912 DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet);
2914 pixels_left = w * h;
2916 DSSDBG("total pixels %d\n", pixels_left);
2918 data += start_offset;
2920 while (pixels_left > 0) {
2921 /* 0x2c = write_memory_start */
2922 /* 0x3c = write_memory_continue */
2923 u8 dcs_cmd = first ? 0x2c : 0x3c;
2929 /* using fifo not empty */
2930 /* TX_FIFO_NOT_EMPTY */
2931 while (FLD_GET(dsi_read_reg(DSI_VC_CTRL(0)), 5, 5)) {
2933 if (fifo_stalls > 0xfffff) {
2934 DSSERR("fifo stalls overflow, pixels left %d\n",
2942 /* using fifo emptiness */
2943 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 <
2944 max_dsi_packet_size) {
2946 if (fifo_stalls > 0xfffff) {
2947 DSSERR("fifo stalls overflow, pixels left %d\n",
2954 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 == 0) {
2956 if (fifo_stalls > 0xfffff) {
2957 DSSERR("fifo stalls overflow, pixels left %d\n",
2964 pixels = min(max_pixels_per_packet, pixels_left);
2966 pixels_left -= pixels;
2968 dsi_vc_write_long_header(0, DSI_DT_DCS_LONG_WRITE,
2969 1 + pixels * bytespp, 0);
2971 DSI_PUSH(0, dcs_cmd);
2973 while (pixels-- > 0) {
2974 u32 pix = __raw_readl(data++);
2976 DSI_PUSH(0, (pix >> 16) & 0xff);
2977 DSI_PUSH(0, (pix >> 8) & 0xff);
2978 DSI_PUSH(0, (pix >> 0) & 0xff);
2981 if (current_x == x+w) {
2993 static void dsi_update_screen_dispc(struct omap_dss_device *dssdev,
2994 u16 x, u16 y, u16 w, u16 h)
3000 unsigned packet_payload;
3001 unsigned packet_len;
3004 const unsigned channel = dsi.update_channel;
3005 /* line buffer is 1024 x 24bits */
3006 /* XXX: for some reason using full buffer size causes considerable TX
3007 * slowdown with update sizes that fill the whole buffer */
3008 const unsigned line_buf_size = 1023 * 3;
3010 DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
3013 dsi_vc_config_vp(channel);
3015 bytespp = dssdev->ctrl.pixel_size / 8;
3016 bytespl = w * bytespp;
3017 bytespf = bytespl * h;
3019 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
3020 * number of lines in a packet. See errata about VP_CLK_RATIO */
3022 if (bytespf < line_buf_size)
3023 packet_payload = bytespf;
3025 packet_payload = (line_buf_size) / bytespl * bytespl;
3027 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
3028 total_len = (bytespf / packet_payload) * packet_len;
3030 if (bytespf % packet_payload)
3031 total_len += (bytespf % packet_payload) + 1;
3033 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
3034 dsi_write_reg(DSI_VC_TE(channel), l);
3036 dsi_vc_write_long_header(channel, DSI_DT_DCS_LONG_WRITE, packet_len, 0);
3039 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
3041 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
3042 dsi_write_reg(DSI_VC_TE(channel), l);
3044 /* We put SIDLEMODE to no-idle for the duration of the transfer,
3045 * because DSS interrupts are not capable of waking up the CPU and the
3046 * framedone interrupt could be delayed for quite a long time. I think
3047 * the same goes for any DSS interrupts, but for some reason I have not
3048 * seen the problem anywhere else than here.
3050 dispc_disable_sidle();
3052 dsi_perf_mark_start();
3054 r = queue_delayed_work(dsi.workqueue, &dsi.framedone_timeout_work,
3055 msecs_to_jiffies(250));
3058 dss_start_update(dssdev);
3060 if (dsi.te_enabled) {
3061 /* disable LP_RX_TO, so that we can receive TE. Time to wait
3062 * for TE is longer than the timer allows */
3063 REG_FLD_MOD(DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
3065 dsi_vc_send_bta(channel);
3067 #ifdef DSI_CATCH_MISSING_TE
3068 mod_timer(&dsi.te_timer, jiffies + msecs_to_jiffies(250));
3073 #ifdef DSI_CATCH_MISSING_TE
3074 static void dsi_te_timeout(unsigned long arg)
3076 DSSERR("TE not received for 250ms!\n");
3080 static void dsi_framedone_bta_callback(void *data, u32 mask);
3082 static void dsi_handle_framedone(int error)
3084 const int channel = dsi.update_channel;
3086 dsi_unregister_isr_vc(channel, dsi_framedone_bta_callback,
3087 NULL, DSI_VC_IRQ_BTA);
3089 cancel_delayed_work(&dsi.framedone_timeout_work);
3091 /* SIDLEMODE back to smart-idle */
3092 dispc_enable_sidle();
3094 if (dsi.te_enabled) {
3095 /* enable LP_RX_TO again after the TE */
3096 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
3099 /* RX_FIFO_NOT_EMPTY */
3100 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
3101 DSSERR("Received error during frame transfer:\n");
3102 dsi_vc_flush_receive_data(channel);
3107 dsi.framedone_callback(error, dsi.framedone_data);
3110 dsi_perf_show("DISPC");
3113 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
3115 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
3116 * 250ms which would conflict with this timeout work. What should be
3117 * done is first cancel the transfer on the HW, and then cancel the
3118 * possibly scheduled framedone work. However, cancelling the transfer
3119 * on the HW is buggy, and would probably require resetting the whole
3122 DSSERR("Framedone not received for 250ms!\n");
3124 dsi_handle_framedone(-ETIMEDOUT);
3127 static void dsi_framedone_bta_callback(void *data, u32 mask)
3129 dsi_handle_framedone(0);
3131 #ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
3132 dispc_fake_vsync_irq();
3136 static void dsi_framedone_irq_callback(void *data, u32 mask)
3138 const int channel = dsi.update_channel;
3141 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
3142 * turns itself off. However, DSI still has the pixels in its buffers,
3143 * and is sending the data.
3146 if (dsi.te_enabled) {
3147 /* enable LP_RX_TO again after the TE */
3148 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
3151 /* Send BTA after the frame. We need this for the TE to work, as TE
3152 * trigger is only sent for BTAs without preceding packet. Thus we need
3153 * to BTA after the pixel packets so that next BTA will cause TE
3156 * This is not needed when TE is not in use, but we do it anyway to
3157 * make sure that the transfer has been completed. It would be more
3158 * optimal, but more complex, to wait only just before starting next
3161 * Also, as there's no interrupt telling when the transfer has been
3162 * done and the channel could be reconfigured, the only way is to
3163 * busyloop until TE_SIZE is zero. With BTA we can do this
3167 r = dsi_register_isr_vc(channel, dsi_framedone_bta_callback,
3168 NULL, DSI_VC_IRQ_BTA);
3170 DSSERR("Failed to register BTA ISR\n");
3171 dsi_handle_framedone(-EIO);
3175 r = dsi_vc_send_bta(channel);
3177 DSSERR("BTA after framedone failed\n");
3178 dsi_unregister_isr_vc(channel, dsi_framedone_bta_callback,
3179 NULL, DSI_VC_IRQ_BTA);
3180 dsi_handle_framedone(-EIO);
3184 int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
3185 u16 *x, u16 *y, u16 *w, u16 *h,
3186 bool enlarge_update_area)
3190 dssdev->driver->get_resolution(dssdev, &dw, &dh);
3192 if (*x > dw || *y > dh)
3204 if (*w == 0 || *h == 0)
3207 dsi_perf_mark_setup();
3209 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
3210 dss_setup_partial_planes(dssdev, x, y, w, h,
3211 enlarge_update_area);
3212 dispc_set_lcd_size(dssdev->manager->id, *w, *h);
3217 EXPORT_SYMBOL(omap_dsi_prepare_update);
3219 int omap_dsi_update(struct omap_dss_device *dssdev,
3221 u16 x, u16 y, u16 w, u16 h,
3222 void (*callback)(int, void *), void *data)
3224 dsi.update_channel = channel;
3226 /* OMAP DSS cannot send updates of odd widths.
3227 * omap_dsi_prepare_update() makes the widths even, but add a BUG_ON
3228 * here to make sure we catch erroneous updates. Otherwise we'll only
3229 * see rather obscure HW error happening, as DSS halts. */
3232 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
3233 dsi.framedone_callback = callback;
3234 dsi.framedone_data = data;
3236 dsi.update_region.x = x;
3237 dsi.update_region.y = y;
3238 dsi.update_region.w = w;
3239 dsi.update_region.h = h;
3240 dsi.update_region.device = dssdev;
3242 dsi_update_screen_dispc(dssdev, x, y, w, h);
3246 r = dsi_update_screen_l4(dssdev, x, y, w, h);
3250 dsi_perf_show("L4");
3256 EXPORT_SYMBOL(omap_dsi_update);
3260 static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
3264 r = omap_dispc_register_isr(dsi_framedone_irq_callback, NULL,
3265 DISPC_IRQ_FRAMEDONE);
3267 DSSERR("can't get FRAMEDONE irq\n");
3271 dispc_set_lcd_display_type(dssdev->manager->id,
3272 OMAP_DSS_LCD_DISPLAY_TFT);
3274 dispc_set_parallel_interface_mode(dssdev->manager->id,
3275 OMAP_DSS_PARALLELMODE_DSI);
3276 dispc_enable_fifohandcheck(dssdev->manager->id, 1);
3278 dispc_set_tft_data_lines(dssdev->manager->id, dssdev->ctrl.pixel_size);
3281 struct omap_video_timings timings = {
3290 dispc_set_lcd_timings(dssdev->manager->id, &timings);
3296 static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev)
3298 omap_dispc_unregister_isr(dsi_framedone_irq_callback, NULL,
3299 DISPC_IRQ_FRAMEDONE);
3302 static int dsi_configure_dsi_clocks(struct omap_dss_device *dssdev)
3304 struct dsi_clock_info cinfo;
3307 /* we always use DSS_CLK_SYSCK as input clock */
3308 cinfo.use_sys_clk = true;
3309 cinfo.regn = dssdev->phy.dsi.div.regn;
3310 cinfo.regm = dssdev->phy.dsi.div.regm;
3311 cinfo.regm_dispc = dssdev->phy.dsi.div.regm_dispc;
3312 cinfo.regm_dsi = dssdev->phy.dsi.div.regm_dsi;
3313 r = dsi_calc_clock_rates(dssdev, &cinfo);
3315 DSSERR("Failed to calc dsi clocks\n");
3319 r = dsi_pll_set_clock_div(&cinfo);
3321 DSSERR("Failed to set dsi clocks\n");
3328 static int dsi_configure_dispc_clocks(struct omap_dss_device *dssdev)
3330 struct dispc_clock_info dispc_cinfo;
3332 unsigned long long fck;
3334 fck = dsi_get_pll_hsdiv_dispc_rate();
3336 dispc_cinfo.lck_div = dssdev->phy.dsi.div.lck_div;
3337 dispc_cinfo.pck_div = dssdev->phy.dsi.div.pck_div;
3339 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
3341 DSSERR("Failed to calc dispc clocks\n");
3345 r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
3347 DSSERR("Failed to set dispc clocks\n");
3354 static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
3358 _dsi_print_reset_status();
3360 r = dsi_pll_init(dssdev, true, true);
3364 r = dsi_configure_dsi_clocks(dssdev);
3368 dss_select_dispc_clk_source(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC);
3369 dss_select_dsi_clk_source(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI);
3373 r = dsi_configure_dispc_clocks(dssdev);
3377 r = dsi_complexio_init(dssdev);
3381 _dsi_print_reset_status();
3383 dsi_proto_timings(dssdev);
3384 dsi_set_lp_clk_divisor(dssdev);
3387 _dsi_print_reset_status();
3389 r = dsi_proto_config(dssdev);
3393 /* enable interface */
3394 dsi_vc_enable(0, 1);
3395 dsi_vc_enable(1, 1);
3396 dsi_vc_enable(2, 1);
3397 dsi_vc_enable(3, 1);
3399 dsi_force_tx_stop_mode_io();
3403 dsi_complexio_uninit();
3405 dss_select_dispc_clk_source(DSS_CLK_SRC_FCK);
3406 dss_select_dsi_clk_source(DSS_CLK_SRC_FCK);
3413 static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev)
3415 /* disable interface */
3417 dsi_vc_enable(0, 0);
3418 dsi_vc_enable(1, 0);
3419 dsi_vc_enable(2, 0);
3420 dsi_vc_enable(3, 0);
3422 dss_select_dispc_clk_source(DSS_CLK_SRC_FCK);
3423 dss_select_dsi_clk_source(DSS_CLK_SRC_FCK);
3424 dsi_complexio_uninit();
3428 static int dsi_core_init(void)
3431 REG_FLD_MOD(DSI_SYSCONFIG, 1, 0, 0);
3434 REG_FLD_MOD(DSI_SYSCONFIG, 1, 2, 2);
3436 /* SIDLEMODE smart-idle */
3437 REG_FLD_MOD(DSI_SYSCONFIG, 2, 4, 3);
3439 _dsi_initialize_irq();
3444 int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
3448 DSSDBG("dsi_display_enable\n");
3450 WARN_ON(!dsi_bus_is_locked());
3452 mutex_lock(&dsi.lock);
3454 r = omap_dss_start_device(dssdev);
3456 DSSERR("failed to start device\n");
3461 dsi_enable_pll_clock(1);
3469 r = dsi_display_init_dispc(dssdev);
3473 r = dsi_display_init_dsi(dssdev);
3477 mutex_unlock(&dsi.lock);
3482 dsi_display_uninit_dispc(dssdev);
3485 dsi_enable_pll_clock(0);
3486 omap_dss_stop_device(dssdev);
3488 mutex_unlock(&dsi.lock);
3489 DSSDBG("dsi_display_enable FAILED\n");
3492 EXPORT_SYMBOL(omapdss_dsi_display_enable);
3494 void omapdss_dsi_display_disable(struct omap_dss_device *dssdev)
3496 DSSDBG("dsi_display_disable\n");
3498 WARN_ON(!dsi_bus_is_locked());
3500 mutex_lock(&dsi.lock);
3502 dsi_display_uninit_dispc(dssdev);
3504 dsi_display_uninit_dsi(dssdev);
3507 dsi_enable_pll_clock(0);
3509 omap_dss_stop_device(dssdev);
3511 mutex_unlock(&dsi.lock);
3513 EXPORT_SYMBOL(omapdss_dsi_display_disable);
3515 int omapdss_dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
3517 dsi.te_enabled = enable;
3520 EXPORT_SYMBOL(omapdss_dsi_enable_te);
3522 void dsi_get_overlay_fifo_thresholds(enum omap_plane plane,
3523 u32 fifo_size, enum omap_burst_size *burst_size,
3524 u32 *fifo_low, u32 *fifo_high)
3526 unsigned burst_size_bytes;
3528 *burst_size = OMAP_DSS_BURST_16x32;
3529 burst_size_bytes = 16 * 32 / 8;
3531 *fifo_high = fifo_size - burst_size_bytes;
3532 *fifo_low = fifo_size - burst_size_bytes * 2;
3535 int dsi_init_display(struct omap_dss_device *dssdev)
3537 DSSDBG("DSI init\n");
3539 /* XXX these should be figured out dynamically */
3540 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
3541 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
3543 if (dsi.vdds_dsi_reg == NULL) {
3544 struct regulator *vdds_dsi;
3546 vdds_dsi = regulator_get(&dsi.pdev->dev, "vdds_dsi");
3548 if (IS_ERR(vdds_dsi)) {
3549 DSSERR("can't get VDDS_DSI regulator\n");
3550 return PTR_ERR(vdds_dsi);
3553 dsi.vdds_dsi_reg = vdds_dsi;
3559 int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
3563 for (i = 0; i < ARRAY_SIZE(dsi.vc); i++) {
3564 if (!dsi.vc[i].dssdev) {
3565 dsi.vc[i].dssdev = dssdev;
3571 DSSERR("cannot get VC for display %s", dssdev->name);
3574 EXPORT_SYMBOL(omap_dsi_request_vc);
3576 int omap_dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id)
3578 if (vc_id < 0 || vc_id > 3) {
3579 DSSERR("VC ID out of range\n");
3583 if (channel < 0 || channel > 3) {
3584 DSSERR("Virtual Channel out of range\n");
3588 if (dsi.vc[channel].dssdev != dssdev) {
3589 DSSERR("Virtual Channel not allocated to display %s\n",
3594 dsi.vc[channel].vc_id = vc_id;
3598 EXPORT_SYMBOL(omap_dsi_set_vc_id);
3600 void omap_dsi_release_vc(struct omap_dss_device *dssdev, int channel)
3602 if ((channel >= 0 && channel <= 3) &&
3603 dsi.vc[channel].dssdev == dssdev) {
3604 dsi.vc[channel].dssdev = NULL;
3605 dsi.vc[channel].vc_id = 0;
3608 EXPORT_SYMBOL(omap_dsi_release_vc);
3610 void dsi_wait_pll_hsdiv_dispc_active(void)
3612 if (wait_for_bit_change(DSI_PLL_STATUS, 7, 1) != 1)
3613 DSSERR("%s (%s) not active\n",
3614 dss_get_generic_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
3615 dss_feat_get_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC));
3618 void dsi_wait_pll_hsdiv_dsi_active(void)
3620 if (wait_for_bit_change(DSI_PLL_STATUS, 8, 1) != 1)
3621 DSSERR("%s (%s) not active\n",
3622 dss_get_generic_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
3623 dss_feat_get_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI));
3626 static void dsi_calc_clock_param_ranges(void)
3628 dsi.regn_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGN);
3629 dsi.regm_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM);
3630 dsi.regm_dispc_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM_DISPC);
3631 dsi.regm_dsi_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM_DSI);
3632 dsi.fint_min = dss_feat_get_param_min(FEAT_PARAM_DSIPLL_FINT);
3633 dsi.fint_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_FINT);
3634 dsi.lpdiv_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_LPDIV);
3637 static int dsi_init(struct platform_device *pdev)
3641 struct resource *dsi_mem;
3643 spin_lock_init(&dsi.irq_lock);
3644 spin_lock_init(&dsi.errors_lock);
3647 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
3648 spin_lock_init(&dsi.irq_stats_lock);
3649 dsi.irq_stats.last_reset = jiffies;
3652 mutex_init(&dsi.lock);
3653 sema_init(&dsi.bus_lock, 1);
3655 dsi.workqueue = create_singlethread_workqueue("dsi");
3656 if (dsi.workqueue == NULL)
3659 INIT_DELAYED_WORK_DEFERRABLE(&dsi.framedone_timeout_work,
3660 dsi_framedone_timeout_work_callback);
3662 #ifdef DSI_CATCH_MISSING_TE
3663 init_timer(&dsi.te_timer);
3664 dsi.te_timer.function = dsi_te_timeout;
3665 dsi.te_timer.data = 0;
3667 dsi_mem = platform_get_resource(dsi.pdev, IORESOURCE_MEM, 0);
3669 DSSERR("can't get IORESOURCE_MEM DSI\n");
3673 dsi.base = ioremap(dsi_mem->start, resource_size(dsi_mem));
3675 DSSERR("can't ioremap DSI\n");
3679 dsi.irq = platform_get_irq(dsi.pdev, 0);
3681 DSSERR("platform_get_irq failed\n");
3686 r = request_irq(dsi.irq, omap_dsi_irq_handler, IRQF_SHARED,
3687 "OMAP DSI1", dsi.pdev);
3689 DSSERR("request_irq failed\n");
3693 /* DSI VCs initialization */
3694 for (i = 0; i < ARRAY_SIZE(dsi.vc); i++) {
3695 dsi.vc[i].mode = DSI_VC_MODE_L4;
3696 dsi.vc[i].dssdev = NULL;
3697 dsi.vc[i].vc_id = 0;
3700 dsi_calc_clock_param_ranges();
3704 rev = dsi_read_reg(DSI_REVISION);
3705 dev_dbg(&pdev->dev, "OMAP DSI rev %d.%d\n",
3706 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
3714 destroy_workqueue(dsi.workqueue);
3718 static void dsi_exit(void)
3720 if (dsi.vdds_dsi_reg != NULL) {
3721 regulator_put(dsi.vdds_dsi_reg);
3722 dsi.vdds_dsi_reg = NULL;
3725 free_irq(dsi.irq, dsi.pdev);
3728 destroy_workqueue(dsi.workqueue);
3730 DSSDBG("omap_dsi_exit\n");
3733 /* DSI1 HW IP initialisation */
3734 static int omap_dsi1hw_probe(struct platform_device *pdev)
3740 DSSERR("Failed to initialize DSI\n");
3747 static int omap_dsi1hw_remove(struct platform_device *pdev)
3753 static struct platform_driver omap_dsi1hw_driver = {
3754 .probe = omap_dsi1hw_probe,
3755 .remove = omap_dsi1hw_remove,
3757 .name = "omapdss_dsi1",
3758 .owner = THIS_MODULE,
3762 int dsi_init_platform_driver(void)
3764 return platform_driver_register(&omap_dsi1hw_driver);
3767 void dsi_uninit_platform_driver(void)
3769 return platform_driver_unregister(&omap_dsi1hw_driver);