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>
36 #include <linux/sched.h>
38 #include <video/omapdss.h>
39 #include <plat/clock.h>
42 #include "dss_features.h"
44 /*#define VERBOSE_IRQ*/
45 #define DSI_CATCH_MISSING_TE
47 struct dsi_reg { u16 idx; };
49 #define DSI_REG(idx) ((const struct dsi_reg) { idx })
51 #define DSI_SZ_REGS SZ_1K
52 /* DSI Protocol Engine */
54 #define DSI_REVISION DSI_REG(0x0000)
55 #define DSI_SYSCONFIG DSI_REG(0x0010)
56 #define DSI_SYSSTATUS DSI_REG(0x0014)
57 #define DSI_IRQSTATUS DSI_REG(0x0018)
58 #define DSI_IRQENABLE DSI_REG(0x001C)
59 #define DSI_CTRL DSI_REG(0x0040)
60 #define DSI_COMPLEXIO_CFG1 DSI_REG(0x0048)
61 #define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(0x004C)
62 #define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(0x0050)
63 #define DSI_CLK_CTRL DSI_REG(0x0054)
64 #define DSI_TIMING1 DSI_REG(0x0058)
65 #define DSI_TIMING2 DSI_REG(0x005C)
66 #define DSI_VM_TIMING1 DSI_REG(0x0060)
67 #define DSI_VM_TIMING2 DSI_REG(0x0064)
68 #define DSI_VM_TIMING3 DSI_REG(0x0068)
69 #define DSI_CLK_TIMING DSI_REG(0x006C)
70 #define DSI_TX_FIFO_VC_SIZE DSI_REG(0x0070)
71 #define DSI_RX_FIFO_VC_SIZE DSI_REG(0x0074)
72 #define DSI_COMPLEXIO_CFG2 DSI_REG(0x0078)
73 #define DSI_RX_FIFO_VC_FULLNESS DSI_REG(0x007C)
74 #define DSI_VM_TIMING4 DSI_REG(0x0080)
75 #define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(0x0084)
76 #define DSI_VM_TIMING5 DSI_REG(0x0088)
77 #define DSI_VM_TIMING6 DSI_REG(0x008C)
78 #define DSI_VM_TIMING7 DSI_REG(0x0090)
79 #define DSI_STOPCLK_TIMING DSI_REG(0x0094)
80 #define DSI_VC_CTRL(n) DSI_REG(0x0100 + (n * 0x20))
81 #define DSI_VC_TE(n) DSI_REG(0x0104 + (n * 0x20))
82 #define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(0x0108 + (n * 0x20))
83 #define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(0x010C + (n * 0x20))
84 #define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(0x0110 + (n * 0x20))
85 #define DSI_VC_IRQSTATUS(n) DSI_REG(0x0118 + (n * 0x20))
86 #define DSI_VC_IRQENABLE(n) DSI_REG(0x011C + (n * 0x20))
90 #define DSI_DSIPHY_CFG0 DSI_REG(0x200 + 0x0000)
91 #define DSI_DSIPHY_CFG1 DSI_REG(0x200 + 0x0004)
92 #define DSI_DSIPHY_CFG2 DSI_REG(0x200 + 0x0008)
93 #define DSI_DSIPHY_CFG5 DSI_REG(0x200 + 0x0014)
94 #define DSI_DSIPHY_CFG10 DSI_REG(0x200 + 0x0028)
96 /* DSI_PLL_CTRL_SCP */
98 #define DSI_PLL_CONTROL DSI_REG(0x300 + 0x0000)
99 #define DSI_PLL_STATUS DSI_REG(0x300 + 0x0004)
100 #define DSI_PLL_GO DSI_REG(0x300 + 0x0008)
101 #define DSI_PLL_CONFIGURATION1 DSI_REG(0x300 + 0x000C)
102 #define DSI_PLL_CONFIGURATION2 DSI_REG(0x300 + 0x0010)
104 #define REG_GET(idx, start, end) \
105 FLD_GET(dsi_read_reg(idx), start, end)
107 #define REG_FLD_MOD(idx, val, start, end) \
108 dsi_write_reg(idx, FLD_MOD(dsi_read_reg(idx), val, start, end))
110 /* Global interrupts */
111 #define DSI_IRQ_VC0 (1 << 0)
112 #define DSI_IRQ_VC1 (1 << 1)
113 #define DSI_IRQ_VC2 (1 << 2)
114 #define DSI_IRQ_VC3 (1 << 3)
115 #define DSI_IRQ_WAKEUP (1 << 4)
116 #define DSI_IRQ_RESYNC (1 << 5)
117 #define DSI_IRQ_PLL_LOCK (1 << 7)
118 #define DSI_IRQ_PLL_UNLOCK (1 << 8)
119 #define DSI_IRQ_PLL_RECALL (1 << 9)
120 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
121 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
122 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
123 #define DSI_IRQ_TE_TRIGGER (1 << 16)
124 #define DSI_IRQ_ACK_TRIGGER (1 << 17)
125 #define DSI_IRQ_SYNC_LOST (1 << 18)
126 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
127 #define DSI_IRQ_TA_TIMEOUT (1 << 20)
128 #define DSI_IRQ_ERROR_MASK \
129 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
131 #define DSI_IRQ_CHANNEL_MASK 0xf
133 /* Virtual channel interrupts */
134 #define DSI_VC_IRQ_CS (1 << 0)
135 #define DSI_VC_IRQ_ECC_CORR (1 << 1)
136 #define DSI_VC_IRQ_PACKET_SENT (1 << 2)
137 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
138 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
139 #define DSI_VC_IRQ_BTA (1 << 5)
140 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
141 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
142 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
143 #define DSI_VC_IRQ_ERROR_MASK \
144 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
145 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
146 DSI_VC_IRQ_FIFO_TX_UDF)
148 /* ComplexIO interrupts */
149 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
150 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
151 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
152 #define DSI_CIO_IRQ_ERRESC1 (1 << 5)
153 #define DSI_CIO_IRQ_ERRESC2 (1 << 6)
154 #define DSI_CIO_IRQ_ERRESC3 (1 << 7)
155 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
156 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
157 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
158 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
159 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
160 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
161 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
162 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
163 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
164 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
165 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
166 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
167 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
168 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
169 #define DSI_CIO_IRQ_ERROR_MASK \
170 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
171 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
172 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRCONTROL1 | \
173 DSI_CIO_IRQ_ERRCONTROL2 | DSI_CIO_IRQ_ERRCONTROL3 | \
174 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
175 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
176 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3)
178 #define DSI_DT_DCS_SHORT_WRITE_0 0x05
179 #define DSI_DT_DCS_SHORT_WRITE_1 0x15
180 #define DSI_DT_DCS_READ 0x06
181 #define DSI_DT_SET_MAX_RET_PKG_SIZE 0x37
182 #define DSI_DT_NULL_PACKET 0x09
183 #define DSI_DT_DCS_LONG_WRITE 0x39
185 #define DSI_DT_RX_ACK_WITH_ERR 0x02
186 #define DSI_DT_RX_DCS_LONG_READ 0x1c
187 #define DSI_DT_RX_SHORT_READ_1 0x21
188 #define DSI_DT_RX_SHORT_READ_2 0x22
190 typedef void (*omap_dsi_isr_t) (void *arg, u32 mask);
192 #define DSI_MAX_NR_ISRS 2
194 struct dsi_isr_data {
202 DSI_FIFO_SIZE_32 = 1,
203 DSI_FIFO_SIZE_64 = 2,
204 DSI_FIFO_SIZE_96 = 3,
205 DSI_FIFO_SIZE_128 = 4,
216 DSI_DATA1_P = 1 << 2,
217 DSI_DATA1_N = 1 << 3,
218 DSI_DATA2_P = 1 << 4,
219 DSI_DATA2_N = 1 << 5,
222 struct dsi_update_region {
224 struct omap_dss_device *device;
227 struct dsi_irq_stats {
228 unsigned long last_reset;
230 unsigned dsi_irqs[32];
231 unsigned vc_irqs[4][32];
232 unsigned cio_irqs[32];
235 struct dsi_isr_tables {
236 struct dsi_isr_data isr_table[DSI_MAX_NR_ISRS];
237 struct dsi_isr_data isr_table_vc[4][DSI_MAX_NR_ISRS];
238 struct dsi_isr_data isr_table_cio[DSI_MAX_NR_ISRS];
243 struct platform_device *pdev;
247 struct dsi_clock_info current_cinfo;
249 bool vdds_dsi_enabled;
250 struct regulator *vdds_dsi_reg;
253 enum dsi_vc_mode mode;
254 struct omap_dss_device *dssdev;
255 enum fifo_size fifo_size;
260 struct semaphore bus_lock;
265 struct dsi_isr_tables isr_tables;
266 /* space for a copy used by the interrupt handler */
267 struct dsi_isr_tables isr_tables_copy;
270 struct dsi_update_region update_region;
275 struct workqueue_struct *workqueue;
277 void (*framedone_callback)(int, void *);
278 void *framedone_data;
280 struct delayed_work framedone_timeout_work;
282 #ifdef DSI_CATCH_MISSING_TE
283 struct timer_list te_timer;
286 unsigned long cache_req_pck;
287 unsigned long cache_clk_freq;
288 struct dsi_clock_info cache_cinfo;
291 spinlock_t errors_lock;
293 ktime_t perf_setup_time;
294 ktime_t perf_start_time;
299 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
300 spinlock_t irq_stats_lock;
301 struct dsi_irq_stats irq_stats;
303 /* DSI PLL Parameter Ranges */
304 unsigned long regm_max, regn_max;
305 unsigned long regm_dispc_max, regm_dsi_max;
306 unsigned long fint_min, fint_max;
307 unsigned long lpdiv_max;
311 static unsigned int dsi_perf;
312 module_param_named(dsi_perf, dsi_perf, bool, 0644);
315 static inline void dsi_write_reg(const struct dsi_reg idx, u32 val)
317 __raw_writel(val, dsi.base + idx.idx);
320 static inline u32 dsi_read_reg(const struct dsi_reg idx)
322 return __raw_readl(dsi.base + idx.idx);
326 void dsi_save_context(void)
330 void dsi_restore_context(void)
334 void dsi_bus_lock(void)
338 EXPORT_SYMBOL(dsi_bus_lock);
340 void dsi_bus_unlock(void)
344 EXPORT_SYMBOL(dsi_bus_unlock);
346 static bool dsi_bus_is_locked(void)
348 return dsi.bus_lock.count == 0;
351 static void dsi_completion_handler(void *data, u32 mask)
353 complete((struct completion *)data);
356 static inline int wait_for_bit_change(const struct dsi_reg idx, int bitnum,
361 while (REG_GET(idx, bitnum, bitnum) != value) {
370 static void dsi_perf_mark_setup(void)
372 dsi.perf_setup_time = ktime_get();
375 static void dsi_perf_mark_start(void)
377 dsi.perf_start_time = ktime_get();
380 static void dsi_perf_show(const char *name)
382 ktime_t t, setup_time, trans_time;
384 u32 setup_us, trans_us, total_us;
391 setup_time = ktime_sub(dsi.perf_start_time, dsi.perf_setup_time);
392 setup_us = (u32)ktime_to_us(setup_time);
396 trans_time = ktime_sub(t, dsi.perf_start_time);
397 trans_us = (u32)ktime_to_us(trans_time);
401 total_us = setup_us + trans_us;
403 total_bytes = dsi.update_region.w *
404 dsi.update_region.h *
405 dsi.update_region.device->ctrl.pixel_size / 8;
407 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
408 "%u bytes, %u kbytes/sec\n",
413 1000*1000 / total_us,
415 total_bytes * 1000 / total_us);
418 #define dsi_perf_mark_setup()
419 #define dsi_perf_mark_start()
420 #define dsi_perf_show(x)
423 static void print_irq_status(u32 status)
429 if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0)
432 printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status);
435 if (status & DSI_IRQ_##x) \
461 static void print_irq_status_vc(int channel, u32 status)
467 if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
470 printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status);
473 if (status & DSI_VC_IRQ_##x) \
490 static void print_irq_status_cio(u32 status)
495 printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status);
498 if (status & DSI_CIO_IRQ_##x) \
512 PIS(ERRCONTENTIONLP0_1);
513 PIS(ERRCONTENTIONLP1_1);
514 PIS(ERRCONTENTIONLP0_2);
515 PIS(ERRCONTENTIONLP1_2);
516 PIS(ERRCONTENTIONLP0_3);
517 PIS(ERRCONTENTIONLP1_3);
518 PIS(ULPSACTIVENOT_ALL0);
519 PIS(ULPSACTIVENOT_ALL1);
525 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
526 static void dsi_collect_irq_stats(u32 irqstatus, u32 *vcstatus, u32 ciostatus)
530 spin_lock(&dsi.irq_stats_lock);
532 dsi.irq_stats.irq_count++;
533 dss_collect_irq_stats(irqstatus, dsi.irq_stats.dsi_irqs);
535 for (i = 0; i < 4; ++i)
536 dss_collect_irq_stats(vcstatus[i], dsi.irq_stats.vc_irqs[i]);
538 dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);
540 spin_unlock(&dsi.irq_stats_lock);
543 #define dsi_collect_irq_stats(irqstatus, vcstatus, ciostatus)
546 static int debug_irq;
548 static void dsi_handle_irq_errors(u32 irqstatus, u32 *vcstatus, u32 ciostatus)
552 if (irqstatus & DSI_IRQ_ERROR_MASK) {
553 DSSERR("DSI error, irqstatus %x\n", irqstatus);
554 print_irq_status(irqstatus);
555 spin_lock(&dsi.errors_lock);
556 dsi.errors |= irqstatus & DSI_IRQ_ERROR_MASK;
557 spin_unlock(&dsi.errors_lock);
558 } else if (debug_irq) {
559 print_irq_status(irqstatus);
562 for (i = 0; i < 4; ++i) {
563 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
564 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
566 print_irq_status_vc(i, vcstatus[i]);
567 } else if (debug_irq) {
568 print_irq_status_vc(i, vcstatus[i]);
572 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
573 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
574 print_irq_status_cio(ciostatus);
575 } else if (debug_irq) {
576 print_irq_status_cio(ciostatus);
580 static void dsi_call_isrs(struct dsi_isr_data *isr_array,
581 unsigned isr_array_size, u32 irqstatus)
583 struct dsi_isr_data *isr_data;
586 for (i = 0; i < isr_array_size; i++) {
587 isr_data = &isr_array[i];
588 if (isr_data->isr && isr_data->mask & irqstatus)
589 isr_data->isr(isr_data->arg, irqstatus);
593 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables,
594 u32 irqstatus, u32 *vcstatus, u32 ciostatus)
598 dsi_call_isrs(isr_tables->isr_table,
599 ARRAY_SIZE(isr_tables->isr_table),
602 for (i = 0; i < 4; ++i) {
603 if (vcstatus[i] == 0)
605 dsi_call_isrs(isr_tables->isr_table_vc[i],
606 ARRAY_SIZE(isr_tables->isr_table_vc[i]),
611 dsi_call_isrs(isr_tables->isr_table_cio,
612 ARRAY_SIZE(isr_tables->isr_table_cio),
616 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
618 u32 irqstatus, vcstatus[4], ciostatus;
621 spin_lock(&dsi.irq_lock);
623 irqstatus = dsi_read_reg(DSI_IRQSTATUS);
625 /* IRQ is not for us */
627 spin_unlock(&dsi.irq_lock);
631 dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
632 /* flush posted write */
633 dsi_read_reg(DSI_IRQSTATUS);
635 for (i = 0; i < 4; ++i) {
636 if ((irqstatus & (1 << i)) == 0) {
641 vcstatus[i] = dsi_read_reg(DSI_VC_IRQSTATUS(i));
643 dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus[i]);
644 /* flush posted write */
645 dsi_read_reg(DSI_VC_IRQSTATUS(i));
648 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
649 ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
651 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
652 /* flush posted write */
653 dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
658 #ifdef DSI_CATCH_MISSING_TE
659 if (irqstatus & DSI_IRQ_TE_TRIGGER)
660 del_timer(&dsi.te_timer);
663 /* make a copy and unlock, so that isrs can unregister
665 memcpy(&dsi.isr_tables_copy, &dsi.isr_tables, sizeof(dsi.isr_tables));
667 spin_unlock(&dsi.irq_lock);
669 dsi_handle_isrs(&dsi.isr_tables_copy, irqstatus, vcstatus, ciostatus);
671 dsi_handle_irq_errors(irqstatus, vcstatus, ciostatus);
673 dsi_collect_irq_stats(irqstatus, vcstatus, ciostatus);
678 /* dsi.irq_lock has to be locked by the caller */
679 static void _omap_dsi_configure_irqs(struct dsi_isr_data *isr_array,
680 unsigned isr_array_size, u32 default_mask,
681 const struct dsi_reg enable_reg,
682 const struct dsi_reg status_reg)
684 struct dsi_isr_data *isr_data;
691 for (i = 0; i < isr_array_size; i++) {
692 isr_data = &isr_array[i];
694 if (isr_data->isr == NULL)
697 mask |= isr_data->mask;
700 old_mask = dsi_read_reg(enable_reg);
701 /* clear the irqstatus for newly enabled irqs */
702 dsi_write_reg(status_reg, (mask ^ old_mask) & mask);
703 dsi_write_reg(enable_reg, mask);
705 /* flush posted writes */
706 dsi_read_reg(enable_reg);
707 dsi_read_reg(status_reg);
710 /* dsi.irq_lock has to be locked by the caller */
711 static void _omap_dsi_set_irqs(void)
713 u32 mask = DSI_IRQ_ERROR_MASK;
714 #ifdef DSI_CATCH_MISSING_TE
715 mask |= DSI_IRQ_TE_TRIGGER;
717 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table,
718 ARRAY_SIZE(dsi.isr_tables.isr_table), mask,
719 DSI_IRQENABLE, DSI_IRQSTATUS);
722 /* dsi.irq_lock has to be locked by the caller */
723 static void _omap_dsi_set_irqs_vc(int vc)
725 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table_vc[vc],
726 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[vc]),
727 DSI_VC_IRQ_ERROR_MASK,
728 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc));
731 /* dsi.irq_lock has to be locked by the caller */
732 static void _omap_dsi_set_irqs_cio(void)
734 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table_cio,
735 ARRAY_SIZE(dsi.isr_tables.isr_table_cio),
736 DSI_CIO_IRQ_ERROR_MASK,
737 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS);
740 static void _dsi_initialize_irq(void)
745 spin_lock_irqsave(&dsi.irq_lock, flags);
747 memset(&dsi.isr_tables, 0, sizeof(dsi.isr_tables));
749 _omap_dsi_set_irqs();
750 for (vc = 0; vc < 4; ++vc)
751 _omap_dsi_set_irqs_vc(vc);
752 _omap_dsi_set_irqs_cio();
754 spin_unlock_irqrestore(&dsi.irq_lock, flags);
757 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
758 struct dsi_isr_data *isr_array, unsigned isr_array_size)
760 struct dsi_isr_data *isr_data;
766 /* check for duplicate entry and find a free slot */
768 for (i = 0; i < isr_array_size; i++) {
769 isr_data = &isr_array[i];
771 if (isr_data->isr == isr && isr_data->arg == arg &&
772 isr_data->mask == mask) {
776 if (isr_data->isr == NULL && free_idx == -1)
783 isr_data = &isr_array[free_idx];
786 isr_data->mask = mask;
791 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
792 struct dsi_isr_data *isr_array, unsigned isr_array_size)
794 struct dsi_isr_data *isr_data;
797 for (i = 0; i < isr_array_size; i++) {
798 isr_data = &isr_array[i];
799 if (isr_data->isr != isr || isr_data->arg != arg ||
800 isr_data->mask != mask)
803 isr_data->isr = NULL;
804 isr_data->arg = NULL;
813 static int dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask)
818 spin_lock_irqsave(&dsi.irq_lock, flags);
820 r = _dsi_register_isr(isr, arg, mask, dsi.isr_tables.isr_table,
821 ARRAY_SIZE(dsi.isr_tables.isr_table));
824 _omap_dsi_set_irqs();
826 spin_unlock_irqrestore(&dsi.irq_lock, flags);
831 static int dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask)
836 spin_lock_irqsave(&dsi.irq_lock, flags);
838 r = _dsi_unregister_isr(isr, arg, mask, dsi.isr_tables.isr_table,
839 ARRAY_SIZE(dsi.isr_tables.isr_table));
842 _omap_dsi_set_irqs();
844 spin_unlock_irqrestore(&dsi.irq_lock, flags);
849 static int dsi_register_isr_vc(int channel, omap_dsi_isr_t isr, void *arg,
855 spin_lock_irqsave(&dsi.irq_lock, flags);
857 r = _dsi_register_isr(isr, arg, mask,
858 dsi.isr_tables.isr_table_vc[channel],
859 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[channel]));
862 _omap_dsi_set_irqs_vc(channel);
864 spin_unlock_irqrestore(&dsi.irq_lock, flags);
869 static int dsi_unregister_isr_vc(int channel, omap_dsi_isr_t isr, void *arg,
875 spin_lock_irqsave(&dsi.irq_lock, flags);
877 r = _dsi_unregister_isr(isr, arg, mask,
878 dsi.isr_tables.isr_table_vc[channel],
879 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[channel]));
882 _omap_dsi_set_irqs_vc(channel);
884 spin_unlock_irqrestore(&dsi.irq_lock, flags);
889 static int dsi_register_isr_cio(omap_dsi_isr_t isr, void *arg, u32 mask)
894 spin_lock_irqsave(&dsi.irq_lock, flags);
896 r = _dsi_register_isr(isr, arg, mask, dsi.isr_tables.isr_table_cio,
897 ARRAY_SIZE(dsi.isr_tables.isr_table_cio));
900 _omap_dsi_set_irqs_cio();
902 spin_unlock_irqrestore(&dsi.irq_lock, flags);
907 static int dsi_unregister_isr_cio(omap_dsi_isr_t isr, void *arg, u32 mask)
912 spin_lock_irqsave(&dsi.irq_lock, flags);
914 r = _dsi_unregister_isr(isr, arg, mask, dsi.isr_tables.isr_table_cio,
915 ARRAY_SIZE(dsi.isr_tables.isr_table_cio));
918 _omap_dsi_set_irqs_cio();
920 spin_unlock_irqrestore(&dsi.irq_lock, flags);
925 static u32 dsi_get_errors(void)
929 spin_lock_irqsave(&dsi.errors_lock, flags);
932 spin_unlock_irqrestore(&dsi.errors_lock, flags);
936 /* DSI func clock. this could also be dsi_pll_hsdiv_dsi_clk */
937 static inline void enable_clocks(bool enable)
940 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
942 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
945 /* source clock for DSI PLL. this could also be PCLKFREE */
946 static inline void dsi_enable_pll_clock(bool enable)
949 dss_clk_enable(DSS_CLK_SYSCK);
951 dss_clk_disable(DSS_CLK_SYSCK);
953 if (enable && dsi.pll_locked) {
954 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1)
955 DSSERR("cannot lock PLL when enabling clocks\n");
960 static void _dsi_print_reset_status(void)
967 /* A dummy read using the SCP interface to any DSIPHY register is
968 * required after DSIPHY reset to complete the reset of the DSI complex
970 l = dsi_read_reg(DSI_DSIPHY_CFG5);
972 printk(KERN_DEBUG "DSI resets: ");
974 l = dsi_read_reg(DSI_PLL_STATUS);
975 printk("PLL (%d) ", FLD_GET(l, 0, 0));
977 l = dsi_read_reg(DSI_COMPLEXIO_CFG1);
978 printk("CIO (%d) ", FLD_GET(l, 29, 29));
980 l = dsi_read_reg(DSI_DSIPHY_CFG5);
981 printk("PHY (%x, %d, %d, %d)\n",
988 #define _dsi_print_reset_status()
991 static inline int dsi_if_enable(bool enable)
993 DSSDBG("dsi_if_enable(%d)\n", enable);
995 enable = enable ? 1 : 0;
996 REG_FLD_MOD(DSI_CTRL, enable, 0, 0); /* IF_EN */
998 if (wait_for_bit_change(DSI_CTRL, 0, enable) != enable) {
999 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
1006 unsigned long dsi_get_pll_hsdiv_dispc_rate(void)
1008 return dsi.current_cinfo.dsi_pll_hsdiv_dispc_clk;
1011 static unsigned long dsi_get_pll_hsdiv_dsi_rate(void)
1013 return dsi.current_cinfo.dsi_pll_hsdiv_dsi_clk;
1016 static unsigned long dsi_get_txbyteclkhs(void)
1018 return dsi.current_cinfo.clkin4ddr / 16;
1021 static unsigned long dsi_fclk_rate(void)
1025 if (dss_get_dsi_clk_source() == OMAP_DSS_CLK_SRC_FCK) {
1026 /* DSI FCLK source is DSS_CLK_FCK */
1027 r = dss_clk_get_rate(DSS_CLK_FCK);
1029 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
1030 r = dsi_get_pll_hsdiv_dsi_rate();
1036 static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev)
1038 unsigned long dsi_fclk;
1039 unsigned lp_clk_div;
1040 unsigned long lp_clk;
1042 lp_clk_div = dssdev->clocks.dsi.lp_clk_div;
1044 if (lp_clk_div == 0 || lp_clk_div > dsi.lpdiv_max)
1047 dsi_fclk = dsi_fclk_rate();
1049 lp_clk = dsi_fclk / 2 / lp_clk_div;
1051 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
1052 dsi.current_cinfo.lp_clk = lp_clk;
1053 dsi.current_cinfo.lp_clk_div = lp_clk_div;
1055 REG_FLD_MOD(DSI_CLK_CTRL, lp_clk_div, 12, 0); /* LP_CLK_DIVISOR */
1057 REG_FLD_MOD(DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0,
1058 21, 21); /* LP_RX_SYNCHRO_ENABLE */
1064 enum dsi_pll_power_state {
1065 DSI_PLL_POWER_OFF = 0x0,
1066 DSI_PLL_POWER_ON_HSCLK = 0x1,
1067 DSI_PLL_POWER_ON_ALL = 0x2,
1068 DSI_PLL_POWER_ON_DIV = 0x3,
1071 static int dsi_pll_power(enum dsi_pll_power_state state)
1075 /* DSI-PLL power command 0x3 is not working */
1076 if (dss_has_feature(FEAT_DSI_PLL_PWR_BUG) &&
1077 state == DSI_PLL_POWER_ON_DIV)
1078 state = DSI_PLL_POWER_ON_ALL;
1080 REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30); /* PLL_PWR_CMD */
1082 /* PLL_PWR_STATUS */
1083 while (FLD_GET(dsi_read_reg(DSI_CLK_CTRL), 29, 28) != state) {
1085 DSSERR("Failed to set DSI PLL power mode to %d\n",
1095 /* calculate clock rates using dividers in cinfo */
1096 static int dsi_calc_clock_rates(struct omap_dss_device *dssdev,
1097 struct dsi_clock_info *cinfo)
1099 if (cinfo->regn == 0 || cinfo->regn > dsi.regn_max)
1102 if (cinfo->regm == 0 || cinfo->regm > dsi.regm_max)
1105 if (cinfo->regm_dispc > dsi.regm_dispc_max)
1108 if (cinfo->regm_dsi > dsi.regm_dsi_max)
1111 if (cinfo->use_sys_clk) {
1112 cinfo->clkin = dss_clk_get_rate(DSS_CLK_SYSCK);
1113 /* XXX it is unclear if highfreq should be used
1114 * with DSS_SYS_CLK source also */
1115 cinfo->highfreq = 0;
1117 cinfo->clkin = dispc_pclk_rate(dssdev->manager->id);
1119 if (cinfo->clkin < 32000000)
1120 cinfo->highfreq = 0;
1122 cinfo->highfreq = 1;
1125 cinfo->fint = cinfo->clkin / (cinfo->regn * (cinfo->highfreq ? 2 : 1));
1127 if (cinfo->fint > dsi.fint_max || cinfo->fint < dsi.fint_min)
1130 cinfo->clkin4ddr = 2 * cinfo->regm * cinfo->fint;
1132 if (cinfo->clkin4ddr > 1800 * 1000 * 1000)
1135 if (cinfo->regm_dispc > 0)
1136 cinfo->dsi_pll_hsdiv_dispc_clk =
1137 cinfo->clkin4ddr / cinfo->regm_dispc;
1139 cinfo->dsi_pll_hsdiv_dispc_clk = 0;
1141 if (cinfo->regm_dsi > 0)
1142 cinfo->dsi_pll_hsdiv_dsi_clk =
1143 cinfo->clkin4ddr / cinfo->regm_dsi;
1145 cinfo->dsi_pll_hsdiv_dsi_clk = 0;
1150 int dsi_pll_calc_clock_div_pck(bool is_tft, unsigned long req_pck,
1151 struct dsi_clock_info *dsi_cinfo,
1152 struct dispc_clock_info *dispc_cinfo)
1154 struct dsi_clock_info cur, best;
1155 struct dispc_clock_info best_dispc;
1156 int min_fck_per_pck;
1158 unsigned long dss_sys_clk, max_dss_fck;
1160 dss_sys_clk = dss_clk_get_rate(DSS_CLK_SYSCK);
1162 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
1164 if (req_pck == dsi.cache_req_pck &&
1165 dsi.cache_cinfo.clkin == dss_sys_clk) {
1166 DSSDBG("DSI clock info found from cache\n");
1167 *dsi_cinfo = dsi.cache_cinfo;
1168 dispc_find_clk_divs(is_tft, req_pck,
1169 dsi_cinfo->dsi_pll_hsdiv_dispc_clk, dispc_cinfo);
1173 min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK;
1175 if (min_fck_per_pck &&
1176 req_pck * min_fck_per_pck > max_dss_fck) {
1177 DSSERR("Requested pixel clock not possible with the current "
1178 "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning "
1179 "the constraint off.\n");
1180 min_fck_per_pck = 0;
1183 DSSDBG("dsi_pll_calc\n");
1186 memset(&best, 0, sizeof(best));
1187 memset(&best_dispc, 0, sizeof(best_dispc));
1189 memset(&cur, 0, sizeof(cur));
1190 cur.clkin = dss_sys_clk;
1191 cur.use_sys_clk = 1;
1194 /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */
1195 /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */
1196 /* To reduce PLL lock time, keep Fint high (around 2 MHz) */
1197 for (cur.regn = 1; cur.regn < dsi.regn_max; ++cur.regn) {
1198 if (cur.highfreq == 0)
1199 cur.fint = cur.clkin / cur.regn;
1201 cur.fint = cur.clkin / (2 * cur.regn);
1203 if (cur.fint > dsi.fint_max || cur.fint < dsi.fint_min)
1206 /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */
1207 for (cur.regm = 1; cur.regm < dsi.regm_max; ++cur.regm) {
1210 a = 2 * cur.regm * (cur.clkin/1000);
1211 b = cur.regn * (cur.highfreq + 1);
1212 cur.clkin4ddr = a / b * 1000;
1214 if (cur.clkin4ddr > 1800 * 1000 * 1000)
1217 /* dsi_pll_hsdiv_dispc_clk(MHz) =
1218 * DSIPHY(MHz) / regm_dispc < 173MHz/186Mhz */
1219 for (cur.regm_dispc = 1; cur.regm_dispc < dsi.regm_dispc_max;
1221 struct dispc_clock_info cur_dispc;
1222 cur.dsi_pll_hsdiv_dispc_clk =
1223 cur.clkin4ddr / cur.regm_dispc;
1225 /* this will narrow down the search a bit,
1226 * but still give pixclocks below what was
1228 if (cur.dsi_pll_hsdiv_dispc_clk < req_pck)
1231 if (cur.dsi_pll_hsdiv_dispc_clk > max_dss_fck)
1234 if (min_fck_per_pck &&
1235 cur.dsi_pll_hsdiv_dispc_clk <
1236 req_pck * min_fck_per_pck)
1241 dispc_find_clk_divs(is_tft, req_pck,
1242 cur.dsi_pll_hsdiv_dispc_clk,
1245 if (abs(cur_dispc.pck - req_pck) <
1246 abs(best_dispc.pck - req_pck)) {
1248 best_dispc = cur_dispc;
1250 if (cur_dispc.pck == req_pck)
1258 if (min_fck_per_pck) {
1259 DSSERR("Could not find suitable clock settings.\n"
1260 "Turning FCK/PCK constraint off and"
1262 min_fck_per_pck = 0;
1266 DSSERR("Could not find suitable clock settings.\n");
1271 /* dsi_pll_hsdiv_dsi_clk (regm_dsi) is not used */
1273 best.dsi_pll_hsdiv_dsi_clk = 0;
1278 *dispc_cinfo = best_dispc;
1280 dsi.cache_req_pck = req_pck;
1281 dsi.cache_clk_freq = 0;
1282 dsi.cache_cinfo = best;
1287 int dsi_pll_set_clock_div(struct dsi_clock_info *cinfo)
1292 u8 regn_start, regn_end, regm_start, regm_end;
1293 u8 regm_dispc_start, regm_dispc_end, regm_dsi_start, regm_dsi_end;
1297 dsi.current_cinfo.use_sys_clk = cinfo->use_sys_clk;
1298 dsi.current_cinfo.highfreq = cinfo->highfreq;
1300 dsi.current_cinfo.fint = cinfo->fint;
1301 dsi.current_cinfo.clkin4ddr = cinfo->clkin4ddr;
1302 dsi.current_cinfo.dsi_pll_hsdiv_dispc_clk =
1303 cinfo->dsi_pll_hsdiv_dispc_clk;
1304 dsi.current_cinfo.dsi_pll_hsdiv_dsi_clk =
1305 cinfo->dsi_pll_hsdiv_dsi_clk;
1307 dsi.current_cinfo.regn = cinfo->regn;
1308 dsi.current_cinfo.regm = cinfo->regm;
1309 dsi.current_cinfo.regm_dispc = cinfo->regm_dispc;
1310 dsi.current_cinfo.regm_dsi = cinfo->regm_dsi;
1312 DSSDBG("DSI Fint %ld\n", cinfo->fint);
1314 DSSDBG("clkin (%s) rate %ld, highfreq %d\n",
1315 cinfo->use_sys_clk ? "dss_sys_clk" : "pclkfree",
1319 /* DSIPHY == CLKIN4DDR */
1320 DSSDBG("CLKIN4DDR = 2 * %d / %d * %lu / %d = %lu\n",
1324 cinfo->highfreq + 1,
1327 DSSDBG("Data rate on 1 DSI lane %ld Mbps\n",
1328 cinfo->clkin4ddr / 1000 / 1000 / 2);
1330 DSSDBG("Clock lane freq %ld Hz\n", cinfo->clkin4ddr / 4);
1332 DSSDBG("regm_dispc = %d, %s (%s) = %lu\n", cinfo->regm_dispc,
1333 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1334 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1335 cinfo->dsi_pll_hsdiv_dispc_clk);
1336 DSSDBG("regm_dsi = %d, %s (%s) = %lu\n", cinfo->regm_dsi,
1337 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1338 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1339 cinfo->dsi_pll_hsdiv_dsi_clk);
1341 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGN, ®n_start, ®n_end);
1342 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM, ®m_start, ®m_end);
1343 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM_DISPC, ®m_dispc_start,
1345 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM_DSI, ®m_dsi_start,
1348 REG_FLD_MOD(DSI_PLL_CONTROL, 0, 0, 0); /* DSI_PLL_AUTOMODE = manual */
1350 l = dsi_read_reg(DSI_PLL_CONFIGURATION1);
1351 l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */
1353 l = FLD_MOD(l, cinfo->regn - 1, regn_start, regn_end);
1355 l = FLD_MOD(l, cinfo->regm, regm_start, regm_end);
1357 l = FLD_MOD(l, cinfo->regm_dispc > 0 ? cinfo->regm_dispc - 1 : 0,
1358 regm_dispc_start, regm_dispc_end);
1359 /* DSIPROTO_CLOCK_DIV */
1360 l = FLD_MOD(l, cinfo->regm_dsi > 0 ? cinfo->regm_dsi - 1 : 0,
1361 regm_dsi_start, regm_dsi_end);
1362 dsi_write_reg(DSI_PLL_CONFIGURATION1, l);
1364 BUG_ON(cinfo->fint < dsi.fint_min || cinfo->fint > dsi.fint_max);
1366 if (dss_has_feature(FEAT_DSI_PLL_FREQSEL)) {
1367 f = cinfo->fint < 1000000 ? 0x3 :
1368 cinfo->fint < 1250000 ? 0x4 :
1369 cinfo->fint < 1500000 ? 0x5 :
1370 cinfo->fint < 1750000 ? 0x6 :
1374 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1376 if (dss_has_feature(FEAT_DSI_PLL_FREQSEL))
1377 l = FLD_MOD(l, f, 4, 1); /* DSI_PLL_FREQSEL */
1378 l = FLD_MOD(l, cinfo->use_sys_clk ? 0 : 1,
1379 11, 11); /* DSI_PLL_CLKSEL */
1380 l = FLD_MOD(l, cinfo->highfreq,
1381 12, 12); /* DSI_PLL_HIGHFREQ */
1382 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1383 l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */
1384 l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */
1385 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1387 REG_FLD_MOD(DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */
1389 if (wait_for_bit_change(DSI_PLL_GO, 0, 0) != 0) {
1390 DSSERR("dsi pll go bit not going down.\n");
1395 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) {
1396 DSSERR("cannot lock PLL\n");
1403 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1404 l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */
1405 l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */
1406 l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */
1407 l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */
1408 l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */
1409 l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */
1410 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1411 l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */
1412 l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */
1413 l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */
1414 l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */
1415 l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */
1416 l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */
1417 l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */
1418 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1420 DSSDBG("PLL config done\n");
1425 int dsi_pll_init(struct omap_dss_device *dssdev, bool enable_hsclk,
1429 enum dsi_pll_power_state pwstate;
1431 DSSDBG("PLL init\n");
1433 if (dsi.vdds_dsi_reg == NULL) {
1434 struct regulator *vdds_dsi;
1436 vdds_dsi = regulator_get(&dsi.pdev->dev, "vdds_dsi");
1438 if (IS_ERR(vdds_dsi)) {
1439 DSSERR("can't get VDDS_DSI regulator\n");
1440 return PTR_ERR(vdds_dsi);
1443 dsi.vdds_dsi_reg = vdds_dsi;
1447 dsi_enable_pll_clock(1);
1449 if (!dsi.vdds_dsi_enabled) {
1450 r = regulator_enable(dsi.vdds_dsi_reg);
1453 dsi.vdds_dsi_enabled = true;
1456 /* XXX PLL does not come out of reset without this... */
1457 dispc_pck_free_enable(1);
1459 if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) {
1460 DSSERR("PLL not coming out of reset.\n");
1462 dispc_pck_free_enable(0);
1466 /* XXX ... but if left on, we get problems when planes do not
1467 * fill the whole display. No idea about this */
1468 dispc_pck_free_enable(0);
1470 if (enable_hsclk && enable_hsdiv)
1471 pwstate = DSI_PLL_POWER_ON_ALL;
1472 else if (enable_hsclk)
1473 pwstate = DSI_PLL_POWER_ON_HSCLK;
1474 else if (enable_hsdiv)
1475 pwstate = DSI_PLL_POWER_ON_DIV;
1477 pwstate = DSI_PLL_POWER_OFF;
1479 r = dsi_pll_power(pwstate);
1484 DSSDBG("PLL init done\n");
1488 if (dsi.vdds_dsi_enabled) {
1489 regulator_disable(dsi.vdds_dsi_reg);
1490 dsi.vdds_dsi_enabled = false;
1494 dsi_enable_pll_clock(0);
1498 void dsi_pll_uninit(bool disconnect_lanes)
1501 dsi_enable_pll_clock(0);
1504 dsi_pll_power(DSI_PLL_POWER_OFF);
1505 if (disconnect_lanes) {
1506 WARN_ON(!dsi.vdds_dsi_enabled);
1507 regulator_disable(dsi.vdds_dsi_reg);
1508 dsi.vdds_dsi_enabled = false;
1510 DSSDBG("PLL uninit done\n");
1513 void dsi_dump_clocks(struct seq_file *s)
1515 struct dsi_clock_info *cinfo = &dsi.current_cinfo;
1516 enum omap_dss_clk_source dispc_clk_src, dsi_clk_src;
1518 dispc_clk_src = dss_get_dispc_clk_source();
1519 dsi_clk_src = dss_get_dsi_clk_source();
1523 seq_printf(s, "- DSI PLL -\n");
1525 seq_printf(s, "dsi pll source = %s\n",
1526 cinfo->use_sys_clk ? "dss_sys_clk" : "pclkfree");
1528 seq_printf(s, "Fint\t\t%-16luregn %u\n", cinfo->fint, cinfo->regn);
1530 seq_printf(s, "CLKIN4DDR\t%-16luregm %u\n",
1531 cinfo->clkin4ddr, cinfo->regm);
1533 seq_printf(s, "%s (%s)\t%-16luregm_dispc %u\t(%s)\n",
1534 dss_get_generic_clk_source_name(dispc_clk_src),
1535 dss_feat_get_clk_source_name(dispc_clk_src),
1536 cinfo->dsi_pll_hsdiv_dispc_clk,
1538 dispc_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1541 seq_printf(s, "%s (%s)\t%-16luregm_dsi %u\t(%s)\n",
1542 dss_get_generic_clk_source_name(dsi_clk_src),
1543 dss_feat_get_clk_source_name(dsi_clk_src),
1544 cinfo->dsi_pll_hsdiv_dsi_clk,
1546 dsi_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1549 seq_printf(s, "- DSI -\n");
1551 seq_printf(s, "dsi fclk source = %s (%s)\n",
1552 dss_get_generic_clk_source_name(dsi_clk_src),
1553 dss_feat_get_clk_source_name(dsi_clk_src));
1555 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate());
1557 seq_printf(s, "DDR_CLK\t\t%lu\n",
1558 cinfo->clkin4ddr / 4);
1560 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs());
1562 seq_printf(s, "LP_CLK\t\t%lu\n", cinfo->lp_clk);
1564 seq_printf(s, "VP_CLK\t\t%lu\n"
1566 dispc_lclk_rate(OMAP_DSS_CHANNEL_LCD),
1567 dispc_pclk_rate(OMAP_DSS_CHANNEL_LCD));
1572 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
1573 void dsi_dump_irqs(struct seq_file *s)
1575 unsigned long flags;
1576 struct dsi_irq_stats stats;
1578 spin_lock_irqsave(&dsi.irq_stats_lock, flags);
1580 stats = dsi.irq_stats;
1581 memset(&dsi.irq_stats, 0, sizeof(dsi.irq_stats));
1582 dsi.irq_stats.last_reset = jiffies;
1584 spin_unlock_irqrestore(&dsi.irq_stats_lock, flags);
1586 seq_printf(s, "period %u ms\n",
1587 jiffies_to_msecs(jiffies - stats.last_reset));
1589 seq_printf(s, "irqs %d\n", stats.irq_count);
1591 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1593 seq_printf(s, "-- DSI interrupts --\n");
1609 PIS(LDO_POWER_GOOD);
1614 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1615 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1616 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1617 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1618 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1620 seq_printf(s, "-- VC interrupts --\n");
1629 PIS(PP_BUSY_CHANGE);
1633 seq_printf(s, "%-20s %10d\n", #x, \
1634 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1636 seq_printf(s, "-- CIO interrupts --\n");
1649 PIS(ERRCONTENTIONLP0_1);
1650 PIS(ERRCONTENTIONLP1_1);
1651 PIS(ERRCONTENTIONLP0_2);
1652 PIS(ERRCONTENTIONLP1_2);
1653 PIS(ERRCONTENTIONLP0_3);
1654 PIS(ERRCONTENTIONLP1_3);
1655 PIS(ULPSACTIVENOT_ALL0);
1656 PIS(ULPSACTIVENOT_ALL1);
1661 void dsi_dump_regs(struct seq_file *s)
1663 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r))
1665 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
1667 DUMPREG(DSI_REVISION);
1668 DUMPREG(DSI_SYSCONFIG);
1669 DUMPREG(DSI_SYSSTATUS);
1670 DUMPREG(DSI_IRQSTATUS);
1671 DUMPREG(DSI_IRQENABLE);
1673 DUMPREG(DSI_COMPLEXIO_CFG1);
1674 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1675 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1676 DUMPREG(DSI_CLK_CTRL);
1677 DUMPREG(DSI_TIMING1);
1678 DUMPREG(DSI_TIMING2);
1679 DUMPREG(DSI_VM_TIMING1);
1680 DUMPREG(DSI_VM_TIMING2);
1681 DUMPREG(DSI_VM_TIMING3);
1682 DUMPREG(DSI_CLK_TIMING);
1683 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1684 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1685 DUMPREG(DSI_COMPLEXIO_CFG2);
1686 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1687 DUMPREG(DSI_VM_TIMING4);
1688 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1689 DUMPREG(DSI_VM_TIMING5);
1690 DUMPREG(DSI_VM_TIMING6);
1691 DUMPREG(DSI_VM_TIMING7);
1692 DUMPREG(DSI_STOPCLK_TIMING);
1694 DUMPREG(DSI_VC_CTRL(0));
1695 DUMPREG(DSI_VC_TE(0));
1696 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1697 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1698 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1699 DUMPREG(DSI_VC_IRQSTATUS(0));
1700 DUMPREG(DSI_VC_IRQENABLE(0));
1702 DUMPREG(DSI_VC_CTRL(1));
1703 DUMPREG(DSI_VC_TE(1));
1704 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1705 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1706 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1707 DUMPREG(DSI_VC_IRQSTATUS(1));
1708 DUMPREG(DSI_VC_IRQENABLE(1));
1710 DUMPREG(DSI_VC_CTRL(2));
1711 DUMPREG(DSI_VC_TE(2));
1712 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1713 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1714 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1715 DUMPREG(DSI_VC_IRQSTATUS(2));
1716 DUMPREG(DSI_VC_IRQENABLE(2));
1718 DUMPREG(DSI_VC_CTRL(3));
1719 DUMPREG(DSI_VC_TE(3));
1720 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1721 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1722 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1723 DUMPREG(DSI_VC_IRQSTATUS(3));
1724 DUMPREG(DSI_VC_IRQENABLE(3));
1726 DUMPREG(DSI_DSIPHY_CFG0);
1727 DUMPREG(DSI_DSIPHY_CFG1);
1728 DUMPREG(DSI_DSIPHY_CFG2);
1729 DUMPREG(DSI_DSIPHY_CFG5);
1731 DUMPREG(DSI_PLL_CONTROL);
1732 DUMPREG(DSI_PLL_STATUS);
1733 DUMPREG(DSI_PLL_GO);
1734 DUMPREG(DSI_PLL_CONFIGURATION1);
1735 DUMPREG(DSI_PLL_CONFIGURATION2);
1737 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
1741 enum dsi_complexio_power_state {
1742 DSI_COMPLEXIO_POWER_OFF = 0x0,
1743 DSI_COMPLEXIO_POWER_ON = 0x1,
1744 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1747 static int dsi_complexio_power(enum dsi_complexio_power_state state)
1752 REG_FLD_MOD(DSI_COMPLEXIO_CFG1, state, 28, 27);
1755 while (FLD_GET(dsi_read_reg(DSI_COMPLEXIO_CFG1), 26, 25) != state) {
1757 DSSERR("failed to set complexio power state to "
1767 static void dsi_complexio_config(struct omap_dss_device *dssdev)
1771 int clk_lane = dssdev->phy.dsi.clk_lane;
1772 int data1_lane = dssdev->phy.dsi.data1_lane;
1773 int data2_lane = dssdev->phy.dsi.data2_lane;
1774 int clk_pol = dssdev->phy.dsi.clk_pol;
1775 int data1_pol = dssdev->phy.dsi.data1_pol;
1776 int data2_pol = dssdev->phy.dsi.data2_pol;
1778 r = dsi_read_reg(DSI_COMPLEXIO_CFG1);
1779 r = FLD_MOD(r, clk_lane, 2, 0);
1780 r = FLD_MOD(r, clk_pol, 3, 3);
1781 r = FLD_MOD(r, data1_lane, 6, 4);
1782 r = FLD_MOD(r, data1_pol, 7, 7);
1783 r = FLD_MOD(r, data2_lane, 10, 8);
1784 r = FLD_MOD(r, data2_pol, 11, 11);
1785 dsi_write_reg(DSI_COMPLEXIO_CFG1, r);
1787 /* The configuration of the DSI complex I/O (number of data lanes,
1788 position, differential order) should not be changed while
1789 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for
1790 the hardware to take into account a new configuration of the complex
1791 I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to
1792 follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1,
1793 then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set
1794 DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the
1795 DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the
1796 DSI complex I/O configuration is unknown. */
1799 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1800 REG_FLD_MOD(DSI_CTRL, 0, 0, 0);
1801 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20);
1802 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1806 static inline unsigned ns2ddr(unsigned ns)
1808 /* convert time in ns to ddr ticks, rounding up */
1809 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1810 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1813 static inline unsigned ddr2ns(unsigned ddr)
1815 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1816 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1819 static void dsi_complexio_timings(void)
1822 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1823 u32 tlpx_half, tclk_trail, tclk_zero;
1826 /* calculate timings */
1828 /* 1 * DDR_CLK = 2 * UI */
1830 /* min 40ns + 4*UI max 85ns + 6*UI */
1831 ths_prepare = ns2ddr(70) + 2;
1833 /* min 145ns + 10*UI */
1834 ths_prepare_ths_zero = ns2ddr(175) + 2;
1836 /* min max(8*UI, 60ns+4*UI) */
1837 ths_trail = ns2ddr(60) + 5;
1840 ths_exit = ns2ddr(145);
1843 tlpx_half = ns2ddr(25);
1846 tclk_trail = ns2ddr(60) + 2;
1848 /* min 38ns, max 95ns */
1849 tclk_prepare = ns2ddr(65);
1851 /* min tclk-prepare + tclk-zero = 300ns */
1852 tclk_zero = ns2ddr(260);
1854 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1855 ths_prepare, ddr2ns(ths_prepare),
1856 ths_prepare_ths_zero, ddr2ns(ths_prepare_ths_zero));
1857 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1858 ths_trail, ddr2ns(ths_trail),
1859 ths_exit, ddr2ns(ths_exit));
1861 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1862 "tclk_zero %u (%uns)\n",
1863 tlpx_half, ddr2ns(tlpx_half),
1864 tclk_trail, ddr2ns(tclk_trail),
1865 tclk_zero, ddr2ns(tclk_zero));
1866 DSSDBG("tclk_prepare %u (%uns)\n",
1867 tclk_prepare, ddr2ns(tclk_prepare));
1869 /* program timings */
1871 r = dsi_read_reg(DSI_DSIPHY_CFG0);
1872 r = FLD_MOD(r, ths_prepare, 31, 24);
1873 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1874 r = FLD_MOD(r, ths_trail, 15, 8);
1875 r = FLD_MOD(r, ths_exit, 7, 0);
1876 dsi_write_reg(DSI_DSIPHY_CFG0, r);
1878 r = dsi_read_reg(DSI_DSIPHY_CFG1);
1879 r = FLD_MOD(r, tlpx_half, 22, 16);
1880 r = FLD_MOD(r, tclk_trail, 15, 8);
1881 r = FLD_MOD(r, tclk_zero, 7, 0);
1882 dsi_write_reg(DSI_DSIPHY_CFG1, r);
1884 r = dsi_read_reg(DSI_DSIPHY_CFG2);
1885 r = FLD_MOD(r, tclk_prepare, 7, 0);
1886 dsi_write_reg(DSI_DSIPHY_CFG2, r);
1889 static void dsi_enable_lane_override(struct omap_dss_device *dssdev,
1890 enum dsi_lane lanes)
1892 int clk_lane = dssdev->phy.dsi.clk_lane;
1893 int data1_lane = dssdev->phy.dsi.data1_lane;
1894 int data2_lane = dssdev->phy.dsi.data2_lane;
1895 int clk_pol = dssdev->phy.dsi.clk_pol;
1896 int data1_pol = dssdev->phy.dsi.data1_pol;
1897 int data2_pol = dssdev->phy.dsi.data2_pol;
1901 if (lanes & DSI_CLK_P)
1902 l |= 1 << ((clk_lane - 1) * 2 + (clk_pol ? 0 : 1));
1903 if (lanes & DSI_CLK_N)
1904 l |= 1 << ((clk_lane - 1) * 2 + (clk_pol ? 1 : 0));
1906 if (lanes & DSI_DATA1_P)
1907 l |= 1 << ((data1_lane - 1) * 2 + (data1_pol ? 0 : 1));
1908 if (lanes & DSI_DATA1_N)
1909 l |= 1 << ((data1_lane - 1) * 2 + (data1_pol ? 1 : 0));
1911 if (lanes & DSI_DATA2_P)
1912 l |= 1 << ((data2_lane - 1) * 2 + (data2_pol ? 0 : 1));
1913 if (lanes & DSI_DATA2_N)
1914 l |= 1 << ((data2_lane - 1) * 2 + (data2_pol ? 1 : 0));
1917 * Bits in REGLPTXSCPDAT4TO0DXDY:
1923 /* Set the lane override configuration */
1924 REG_FLD_MOD(DSI_DSIPHY_CFG10, l, 22, 17); /* REGLPTXSCPDAT4TO0DXDY */
1926 /* Enable lane override */
1927 REG_FLD_MOD(DSI_DSIPHY_CFG10, 1, 27, 27); /* ENLPTXSCPDAT */
1930 static void dsi_disable_lane_override(void)
1932 /* Disable lane override */
1933 REG_FLD_MOD(DSI_DSIPHY_CFG10, 0, 27, 27); /* ENLPTXSCPDAT */
1934 /* Reset the lane override configuration */
1935 REG_FLD_MOD(DSI_DSIPHY_CFG10, 0, 22, 17); /* REGLPTXSCPDAT4TO0DXDY */
1938 static int dsi_complexio_init(struct omap_dss_device *dssdev)
1943 DSSDBG("dsi_complexio_init\n");
1945 if (dsi.ulps_enabled)
1946 DSSDBG("manual ulps exit\n");
1948 /* A dummy read using the SCP interface to any DSIPHY register is
1949 * required after DSIPHY reset to complete the reset of the DSI complex
1951 dsi_read_reg(DSI_DSIPHY_CFG5);
1953 if (wait_for_bit_change(DSI_DSIPHY_CFG5, 30, 1) != 1) {
1954 DSSERR("ComplexIO PHY not coming out of reset.\n");
1959 dsi_complexio_config(dssdev);
1961 dsi_if_enable(true);
1962 dsi_if_enable(false);
1963 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
1965 /* set TX STOP MODE timer to maximum for this operation */
1966 l = dsi_read_reg(DSI_TIMING1);
1967 l = FLD_MOD(l, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
1968 l = FLD_MOD(l, 1, 14, 14); /* STOP_STATE_X16_IO */
1969 l = FLD_MOD(l, 1, 13, 13); /* STOP_STATE_X4_IO */
1970 l = FLD_MOD(l, 0x1fff, 12, 0); /* STOP_STATE_COUNTER_IO */
1971 dsi_write_reg(DSI_TIMING1, l);
1973 if (dsi.ulps_enabled) {
1974 /* ULPS is exited by Mark-1 state for 1ms, followed by
1975 * stop state. DSS HW cannot do this via the normal
1976 * ULPS exit sequence, as after reset the DSS HW thinks
1977 * that we are not in ULPS mode, and refuses to send the
1978 * sequence. So we need to send the ULPS exit sequence
1982 dsi_enable_lane_override(dssdev,
1983 DSI_CLK_P | DSI_DATA1_P | DSI_DATA2_P);
1986 r = dsi_complexio_power(DSI_COMPLEXIO_POWER_ON);
1990 if (dsi.ulps_enabled) {
1991 /* Keep Mark-1 state for 1ms (as per DSI spec) */
1992 ktime_t wait = ns_to_ktime(1000 * 1000);
1993 set_current_state(TASK_UNINTERRUPTIBLE);
1994 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
1996 /* Disable the override. The lanes should be set to Mark-11
1997 * state by the HW */
1998 dsi_disable_lane_override();
2001 /* FORCE_TX_STOP_MODE_IO */
2002 REG_FLD_MOD(DSI_TIMING1, 0, 15, 15);
2004 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
2005 DSSERR("ComplexIO not coming out of reset.\n");
2010 dsi_complexio_timings();
2012 dsi.ulps_enabled = false;
2014 DSSDBG("CIO init done\n");
2019 static void dsi_complexio_uninit(void)
2021 dsi_complexio_power(DSI_COMPLEXIO_POWER_OFF);
2024 static int _dsi_wait_reset(void)
2028 while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) {
2030 DSSERR("soft reset failed\n");
2039 static int _dsi_reset(void)
2042 REG_FLD_MOD(DSI_SYSCONFIG, 1, 1, 1);
2043 return _dsi_wait_reset();
2046 static void dsi_config_tx_fifo(enum fifo_size size1, enum fifo_size size2,
2047 enum fifo_size size3, enum fifo_size size4)
2053 dsi.vc[0].fifo_size = size1;
2054 dsi.vc[1].fifo_size = size2;
2055 dsi.vc[2].fifo_size = size3;
2056 dsi.vc[3].fifo_size = size4;
2058 for (i = 0; i < 4; i++) {
2060 int size = dsi.vc[i].fifo_size;
2062 if (add + size > 4) {
2063 DSSERR("Illegal FIFO configuration\n");
2067 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2069 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
2073 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, r);
2076 static void dsi_config_rx_fifo(enum fifo_size size1, enum fifo_size size2,
2077 enum fifo_size size3, enum fifo_size size4)
2083 dsi.vc[0].fifo_size = size1;
2084 dsi.vc[1].fifo_size = size2;
2085 dsi.vc[2].fifo_size = size3;
2086 dsi.vc[3].fifo_size = size4;
2088 for (i = 0; i < 4; i++) {
2090 int size = dsi.vc[i].fifo_size;
2092 if (add + size > 4) {
2093 DSSERR("Illegal FIFO configuration\n");
2097 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2099 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
2103 dsi_write_reg(DSI_RX_FIFO_VC_SIZE, r);
2106 static int dsi_force_tx_stop_mode_io(void)
2110 r = dsi_read_reg(DSI_TIMING1);
2111 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2112 dsi_write_reg(DSI_TIMING1, r);
2114 if (wait_for_bit_change(DSI_TIMING1, 15, 0) != 0) {
2115 DSSERR("TX_STOP bit not going down\n");
2122 static bool dsi_vc_is_enabled(int channel)
2124 return REG_GET(DSI_VC_CTRL(channel), 0, 0);
2127 static void dsi_packet_sent_handler_vp(void *data, u32 mask)
2129 const int channel = dsi.update_channel;
2130 u8 bit = dsi.te_enabled ? 30 : 31;
2132 if (REG_GET(DSI_VC_TE(channel), bit, bit) == 0)
2133 complete((struct completion *)data);
2136 static int dsi_sync_vc_vp(int channel)
2141 DECLARE_COMPLETION_ONSTACK(completion);
2143 bit = dsi.te_enabled ? 30 : 31;
2145 r = dsi_register_isr_vc(channel, dsi_packet_sent_handler_vp,
2146 &completion, DSI_VC_IRQ_PACKET_SENT);
2150 /* Wait for completion only if TE_EN/TE_START is still set */
2151 if (REG_GET(DSI_VC_TE(channel), bit, bit)) {
2152 if (wait_for_completion_timeout(&completion,
2153 msecs_to_jiffies(10)) == 0) {
2154 DSSERR("Failed to complete previous frame transfer\n");
2160 dsi_unregister_isr_vc(channel, dsi_packet_sent_handler_vp,
2161 &completion, DSI_VC_IRQ_PACKET_SENT);
2165 dsi_unregister_isr_vc(channel, dsi_packet_sent_handler_vp, &completion,
2166 DSI_VC_IRQ_PACKET_SENT);
2171 static void dsi_packet_sent_handler_l4(void *data, u32 mask)
2173 const int channel = dsi.update_channel;
2175 if (REG_GET(DSI_VC_CTRL(channel), 5, 5) == 0)
2176 complete((struct completion *)data);
2179 static int dsi_sync_vc_l4(int channel)
2183 DECLARE_COMPLETION_ONSTACK(completion);
2185 r = dsi_register_isr_vc(channel, dsi_packet_sent_handler_l4,
2186 &completion, DSI_VC_IRQ_PACKET_SENT);
2190 /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */
2191 if (REG_GET(DSI_VC_CTRL(channel), 5, 5)) {
2192 if (wait_for_completion_timeout(&completion,
2193 msecs_to_jiffies(10)) == 0) {
2194 DSSERR("Failed to complete previous l4 transfer\n");
2200 dsi_unregister_isr_vc(channel, dsi_packet_sent_handler_l4,
2201 &completion, DSI_VC_IRQ_PACKET_SENT);
2205 dsi_unregister_isr_vc(channel, dsi_packet_sent_handler_l4,
2206 &completion, DSI_VC_IRQ_PACKET_SENT);
2211 static int dsi_sync_vc(int channel)
2213 WARN_ON(!dsi_bus_is_locked());
2215 WARN_ON(in_interrupt());
2217 if (!dsi_vc_is_enabled(channel))
2220 switch (dsi.vc[channel].mode) {
2221 case DSI_VC_MODE_VP:
2222 return dsi_sync_vc_vp(channel);
2223 case DSI_VC_MODE_L4:
2224 return dsi_sync_vc_l4(channel);
2230 static int dsi_vc_enable(int channel, bool enable)
2232 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
2235 enable = enable ? 1 : 0;
2237 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 0, 0);
2239 if (wait_for_bit_change(DSI_VC_CTRL(channel), 0, enable) != enable) {
2240 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
2247 static void dsi_vc_initial_config(int channel)
2251 DSSDBGF("%d", channel);
2253 r = dsi_read_reg(DSI_VC_CTRL(channel));
2255 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
2256 DSSERR("VC(%d) busy when trying to configure it!\n",
2259 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
2260 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
2261 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
2262 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
2263 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
2264 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
2265 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
2266 if (dss_has_feature(FEAT_DSI_VC_OCP_WIDTH))
2267 r = FLD_MOD(r, 3, 11, 10); /* OCP_WIDTH = 32 bit */
2269 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
2270 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
2272 dsi_write_reg(DSI_VC_CTRL(channel), r);
2275 static int dsi_vc_config_l4(int channel)
2277 if (dsi.vc[channel].mode == DSI_VC_MODE_L4)
2280 DSSDBGF("%d", channel);
2282 dsi_sync_vc(channel);
2284 dsi_vc_enable(channel, 0);
2287 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
2288 DSSERR("vc(%d) busy when trying to config for L4\n", channel);
2292 REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */
2294 /* DCS_CMD_ENABLE */
2295 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC))
2296 REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 30, 30);
2298 dsi_vc_enable(channel, 1);
2300 dsi.vc[channel].mode = DSI_VC_MODE_L4;
2305 static int dsi_vc_config_vp(int channel)
2307 if (dsi.vc[channel].mode == DSI_VC_MODE_VP)
2310 DSSDBGF("%d", channel);
2312 dsi_sync_vc(channel);
2314 dsi_vc_enable(channel, 0);
2317 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
2318 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
2322 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 1, 1); /* SOURCE, 1 = video port */
2324 /* DCS_CMD_ENABLE */
2325 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC))
2326 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 30, 30);
2328 dsi_vc_enable(channel, 1);
2330 dsi.vc[channel].mode = DSI_VC_MODE_VP;
2336 void omapdss_dsi_vc_enable_hs(int channel, bool enable)
2338 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
2340 WARN_ON(!dsi_bus_is_locked());
2342 dsi_vc_enable(channel, 0);
2345 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 9, 9);
2347 dsi_vc_enable(channel, 1);
2350 dsi_force_tx_stop_mode_io();
2352 EXPORT_SYMBOL(omapdss_dsi_vc_enable_hs);
2354 static void dsi_vc_flush_long_data(int channel)
2356 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2358 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2359 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
2363 (val >> 24) & 0xff);
2367 static void dsi_show_rx_ack_with_err(u16 err)
2369 DSSERR("\tACK with ERROR (%#x):\n", err);
2371 DSSERR("\t\tSoT Error\n");
2373 DSSERR("\t\tSoT Sync Error\n");
2375 DSSERR("\t\tEoT Sync Error\n");
2377 DSSERR("\t\tEscape Mode Entry Command Error\n");
2379 DSSERR("\t\tLP Transmit Sync Error\n");
2381 DSSERR("\t\tHS Receive Timeout Error\n");
2383 DSSERR("\t\tFalse Control Error\n");
2385 DSSERR("\t\t(reserved7)\n");
2387 DSSERR("\t\tECC Error, single-bit (corrected)\n");
2389 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
2390 if (err & (1 << 10))
2391 DSSERR("\t\tChecksum Error\n");
2392 if (err & (1 << 11))
2393 DSSERR("\t\tData type not recognized\n");
2394 if (err & (1 << 12))
2395 DSSERR("\t\tInvalid VC ID\n");
2396 if (err & (1 << 13))
2397 DSSERR("\t\tInvalid Transmission Length\n");
2398 if (err & (1 << 14))
2399 DSSERR("\t\t(reserved14)\n");
2400 if (err & (1 << 15))
2401 DSSERR("\t\tDSI Protocol Violation\n");
2404 static u16 dsi_vc_flush_receive_data(int channel)
2406 /* RX_FIFO_NOT_EMPTY */
2407 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2410 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2411 DSSERR("\trawval %#08x\n", val);
2412 dt = FLD_GET(val, 5, 0);
2413 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2414 u16 err = FLD_GET(val, 23, 8);
2415 dsi_show_rx_ack_with_err(err);
2416 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2417 DSSERR("\tDCS short response, 1 byte: %#x\n",
2418 FLD_GET(val, 23, 8));
2419 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2420 DSSERR("\tDCS short response, 2 byte: %#x\n",
2421 FLD_GET(val, 23, 8));
2422 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2423 DSSERR("\tDCS long response, len %d\n",
2424 FLD_GET(val, 23, 8));
2425 dsi_vc_flush_long_data(channel);
2427 DSSERR("\tunknown datatype 0x%02x\n", dt);
2433 static int dsi_vc_send_bta(int channel)
2435 if (dsi.debug_write || dsi.debug_read)
2436 DSSDBG("dsi_vc_send_bta %d\n", channel);
2438 WARN_ON(!dsi_bus_is_locked());
2440 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2441 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
2442 dsi_vc_flush_receive_data(channel);
2445 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
2450 int dsi_vc_send_bta_sync(int channel)
2452 DECLARE_COMPLETION_ONSTACK(completion);
2456 r = dsi_register_isr_vc(channel, dsi_completion_handler,
2457 &completion, DSI_VC_IRQ_BTA);
2461 r = dsi_register_isr(dsi_completion_handler, &completion,
2462 DSI_IRQ_ERROR_MASK);
2466 r = dsi_vc_send_bta(channel);
2470 if (wait_for_completion_timeout(&completion,
2471 msecs_to_jiffies(500)) == 0) {
2472 DSSERR("Failed to receive BTA\n");
2477 err = dsi_get_errors();
2479 DSSERR("Error while sending BTA: %x\n", err);
2484 dsi_unregister_isr(dsi_completion_handler, &completion,
2485 DSI_IRQ_ERROR_MASK);
2487 dsi_unregister_isr_vc(channel, dsi_completion_handler,
2488 &completion, DSI_VC_IRQ_BTA);
2492 EXPORT_SYMBOL(dsi_vc_send_bta_sync);
2494 static inline void dsi_vc_write_long_header(int channel, u8 data_type,
2500 WARN_ON(!dsi_bus_is_locked());
2502 data_id = data_type | dsi.vc[channel].vc_id << 6;
2504 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
2505 FLD_VAL(ecc, 31, 24);
2507 dsi_write_reg(DSI_VC_LONG_PACKET_HEADER(channel), val);
2510 static inline void dsi_vc_write_long_payload(int channel,
2511 u8 b1, u8 b2, u8 b3, u8 b4)
2515 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
2517 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
2518 b1, b2, b3, b4, val); */
2520 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
2523 static int dsi_vc_send_long(int channel, u8 data_type, u8 *data, u16 len,
2532 if (dsi.debug_write)
2533 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
2536 if (dsi.vc[channel].fifo_size * 32 * 4 < len + 4) {
2537 DSSERR("unable to send long packet: packet too long.\n");
2541 dsi_vc_config_l4(channel);
2543 dsi_vc_write_long_header(channel, data_type, len, ecc);
2546 for (i = 0; i < len >> 2; i++) {
2547 if (dsi.debug_write)
2548 DSSDBG("\tsending full packet %d\n", i);
2555 dsi_vc_write_long_payload(channel, b1, b2, b3, b4);
2560 b1 = 0; b2 = 0; b3 = 0;
2562 if (dsi.debug_write)
2563 DSSDBG("\tsending remainder bytes %d\n", i);
2580 dsi_vc_write_long_payload(channel, b1, b2, b3, 0);
2586 static int dsi_vc_send_short(int channel, u8 data_type, u16 data, u8 ecc)
2591 WARN_ON(!dsi_bus_is_locked());
2593 if (dsi.debug_write)
2594 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2596 data_type, data & 0xff, (data >> 8) & 0xff);
2598 dsi_vc_config_l4(channel);
2600 if (FLD_GET(dsi_read_reg(DSI_VC_CTRL(channel)), 16, 16)) {
2601 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2605 data_id = data_type | dsi.vc[channel].vc_id << 6;
2607 r = (data_id << 0) | (data << 8) | (ecc << 24);
2609 dsi_write_reg(DSI_VC_SHORT_PACKET_HEADER(channel), r);
2614 int dsi_vc_send_null(int channel)
2616 u8 nullpkg[] = {0, 0, 0, 0};
2617 return dsi_vc_send_long(channel, DSI_DT_NULL_PACKET, nullpkg, 4, 0);
2619 EXPORT_SYMBOL(dsi_vc_send_null);
2621 int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len)
2628 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_0,
2630 } else if (len == 2) {
2631 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_1,
2632 data[0] | (data[1] << 8), 0);
2634 /* 0x39 = DCS Long Write */
2635 r = dsi_vc_send_long(channel, DSI_DT_DCS_LONG_WRITE,
2641 EXPORT_SYMBOL(dsi_vc_dcs_write_nosync);
2643 int dsi_vc_dcs_write(int channel, u8 *data, int len)
2647 r = dsi_vc_dcs_write_nosync(channel, data, len);
2651 r = dsi_vc_send_bta_sync(channel);
2655 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2656 DSSERR("rx fifo not empty after write, dumping data:\n");
2657 dsi_vc_flush_receive_data(channel);
2664 DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
2665 channel, data[0], len);
2668 EXPORT_SYMBOL(dsi_vc_dcs_write);
2670 int dsi_vc_dcs_write_0(int channel, u8 dcs_cmd)
2672 return dsi_vc_dcs_write(channel, &dcs_cmd, 1);
2674 EXPORT_SYMBOL(dsi_vc_dcs_write_0);
2676 int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param)
2681 return dsi_vc_dcs_write(channel, buf, 2);
2683 EXPORT_SYMBOL(dsi_vc_dcs_write_1);
2685 int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
2692 DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %x)\n", channel, dcs_cmd);
2694 r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
2698 r = dsi_vc_send_bta_sync(channel);
2702 /* RX_FIFO_NOT_EMPTY */
2703 if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
2704 DSSERR("RX fifo empty when trying to read.\n");
2709 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2711 DSSDBG("\theader: %08x\n", val);
2712 dt = FLD_GET(val, 5, 0);
2713 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2714 u16 err = FLD_GET(val, 23, 8);
2715 dsi_show_rx_ack_with_err(err);
2719 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2720 u8 data = FLD_GET(val, 15, 8);
2722 DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
2732 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2733 u16 data = FLD_GET(val, 23, 8);
2735 DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
2742 buf[0] = data & 0xff;
2743 buf[1] = (data >> 8) & 0xff;
2746 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2748 int len = FLD_GET(val, 23, 8);
2750 DSSDBG("\tDCS long response, len %d\n", len);
2757 /* two byte checksum ends the packet, not included in len */
2758 for (w = 0; w < len + 2;) {
2760 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2762 DSSDBG("\t\t%02x %02x %02x %02x\n",
2766 (val >> 24) & 0xff);
2768 for (b = 0; b < 4; ++b) {
2770 buf[w] = (val >> (b * 8)) & 0xff;
2771 /* we discard the 2 byte checksum */
2778 DSSERR("\tunknown datatype 0x%02x\n", dt);
2785 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
2790 EXPORT_SYMBOL(dsi_vc_dcs_read);
2792 int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
2796 r = dsi_vc_dcs_read(channel, dcs_cmd, data, 1);
2806 EXPORT_SYMBOL(dsi_vc_dcs_read_1);
2808 int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u8 *data1, u8 *data2)
2813 r = dsi_vc_dcs_read(channel, dcs_cmd, buf, 2);
2826 EXPORT_SYMBOL(dsi_vc_dcs_read_2);
2828 int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
2830 return dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
2833 EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
2835 static int dsi_enter_ulps(void)
2837 DECLARE_COMPLETION_ONSTACK(completion);
2842 WARN_ON(!dsi_bus_is_locked());
2844 WARN_ON(dsi.ulps_enabled);
2846 if (dsi.ulps_enabled)
2849 if (REG_GET(DSI_CLK_CTRL, 13, 13)) {
2850 DSSERR("DDR_CLK_ALWAYS_ON enabled when entering ULPS\n");
2859 dsi_force_tx_stop_mode_io();
2861 dsi_vc_enable(0, false);
2862 dsi_vc_enable(1, false);
2863 dsi_vc_enable(2, false);
2864 dsi_vc_enable(3, false);
2866 if (REG_GET(DSI_COMPLEXIO_CFG2, 16, 16)) { /* HS_BUSY */
2867 DSSERR("HS busy when enabling ULPS\n");
2871 if (REG_GET(DSI_COMPLEXIO_CFG2, 17, 17)) { /* LP_BUSY */
2872 DSSERR("LP busy when enabling ULPS\n");
2876 r = dsi_register_isr_cio(dsi_completion_handler, &completion,
2877 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
2881 /* Assert TxRequestEsc for data lanes and TxUlpsClk for clk lane */
2882 /* LANEx_ULPS_SIG2 */
2883 REG_FLD_MOD(DSI_COMPLEXIO_CFG2, (1 << 0) | (1 << 1) | (1 << 2), 7, 5);
2885 if (wait_for_completion_timeout(&completion,
2886 msecs_to_jiffies(1000)) == 0) {
2887 DSSERR("ULPS enable timeout\n");
2892 dsi_unregister_isr_cio(dsi_completion_handler, &completion,
2893 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
2895 dsi_complexio_power(DSI_COMPLEXIO_POWER_ULPS);
2897 dsi_if_enable(false);
2899 dsi.ulps_enabled = true;
2904 dsi_unregister_isr_cio(dsi_completion_handler, &completion,
2905 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
2909 static void dsi_set_lp_rx_timeout(unsigned ticks, bool x4, bool x16)
2912 unsigned long total_ticks;
2915 BUG_ON(ticks > 0x1fff);
2917 /* ticks in DSI_FCK */
2918 fck = dsi_fclk_rate();
2920 r = dsi_read_reg(DSI_TIMING2);
2921 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
2922 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
2923 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
2924 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
2925 dsi_write_reg(DSI_TIMING2, r);
2927 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2929 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2931 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2932 (total_ticks * 1000) / (fck / 1000 / 1000));
2935 static void dsi_set_ta_timeout(unsigned ticks, bool x8, bool x16)
2938 unsigned long total_ticks;
2941 BUG_ON(ticks > 0x1fff);
2943 /* ticks in DSI_FCK */
2944 fck = dsi_fclk_rate();
2946 r = dsi_read_reg(DSI_TIMING1);
2947 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
2948 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
2949 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
2950 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
2951 dsi_write_reg(DSI_TIMING1, r);
2953 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
2955 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
2957 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
2958 (total_ticks * 1000) / (fck / 1000 / 1000));
2961 static void dsi_set_stop_state_counter(unsigned ticks, bool x4, bool x16)
2964 unsigned long total_ticks;
2967 BUG_ON(ticks > 0x1fff);
2969 /* ticks in DSI_FCK */
2970 fck = dsi_fclk_rate();
2972 r = dsi_read_reg(DSI_TIMING1);
2973 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2974 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
2975 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
2976 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
2977 dsi_write_reg(DSI_TIMING1, r);
2979 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2981 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
2983 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2984 (total_ticks * 1000) / (fck / 1000 / 1000));
2987 static void dsi_set_hs_tx_timeout(unsigned ticks, bool x4, bool x16)
2990 unsigned long total_ticks;
2993 BUG_ON(ticks > 0x1fff);
2995 /* ticks in TxByteClkHS */
2996 fck = dsi_get_txbyteclkhs();
2998 r = dsi_read_reg(DSI_TIMING2);
2999 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
3000 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
3001 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
3002 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
3003 dsi_write_reg(DSI_TIMING2, r);
3005 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3007 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3009 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3010 (total_ticks * 1000) / (fck / 1000 / 1000));
3012 static int dsi_proto_config(struct omap_dss_device *dssdev)
3017 dsi_config_tx_fifo(DSI_FIFO_SIZE_32,
3022 dsi_config_rx_fifo(DSI_FIFO_SIZE_32,
3027 /* XXX what values for the timeouts? */
3028 dsi_set_stop_state_counter(0x1000, false, false);
3029 dsi_set_ta_timeout(0x1fff, true, true);
3030 dsi_set_lp_rx_timeout(0x1fff, true, true);
3031 dsi_set_hs_tx_timeout(0x1fff, true, true);
3033 switch (dssdev->ctrl.pixel_size) {
3047 r = dsi_read_reg(DSI_CTRL);
3048 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
3049 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
3050 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
3051 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
3052 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
3053 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
3054 r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */
3055 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
3056 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
3057 if (!dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) {
3058 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
3059 /* DCS_CMD_CODE, 1=start, 0=continue */
3060 r = FLD_MOD(r, 0, 25, 25);
3063 dsi_write_reg(DSI_CTRL, r);
3065 dsi_vc_initial_config(0);
3066 dsi_vc_initial_config(1);
3067 dsi_vc_initial_config(2);
3068 dsi_vc_initial_config(3);
3073 static void dsi_proto_timings(struct omap_dss_device *dssdev)
3075 unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail;
3076 unsigned tclk_pre, tclk_post;
3077 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
3078 unsigned ths_trail, ths_exit;
3079 unsigned ddr_clk_pre, ddr_clk_post;
3080 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
3084 r = dsi_read_reg(DSI_DSIPHY_CFG0);
3085 ths_prepare = FLD_GET(r, 31, 24);
3086 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
3087 ths_zero = ths_prepare_ths_zero - ths_prepare;
3088 ths_trail = FLD_GET(r, 15, 8);
3089 ths_exit = FLD_GET(r, 7, 0);
3091 r = dsi_read_reg(DSI_DSIPHY_CFG1);
3092 tlpx = FLD_GET(r, 22, 16) * 2;
3093 tclk_trail = FLD_GET(r, 15, 8);
3094 tclk_zero = FLD_GET(r, 7, 0);
3096 r = dsi_read_reg(DSI_DSIPHY_CFG2);
3097 tclk_prepare = FLD_GET(r, 7, 0);
3101 /* min 60ns + 52*UI */
3102 tclk_post = ns2ddr(60) + 26;
3104 /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */
3105 if (dssdev->phy.dsi.data1_lane != 0 &&
3106 dssdev->phy.dsi.data2_lane != 0)
3111 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
3113 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
3115 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
3116 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
3118 r = dsi_read_reg(DSI_CLK_TIMING);
3119 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
3120 r = FLD_MOD(r, ddr_clk_post, 7, 0);
3121 dsi_write_reg(DSI_CLK_TIMING, r);
3123 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
3127 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
3128 DIV_ROUND_UP(ths_prepare, 4) +
3129 DIV_ROUND_UP(ths_zero + 3, 4);
3131 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
3133 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
3134 FLD_VAL(exit_hs_mode_lat, 15, 0);
3135 dsi_write_reg(DSI_VM_TIMING7, r);
3137 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
3138 enter_hs_mode_lat, exit_hs_mode_lat);
3142 #define DSI_DECL_VARS \
3143 int __dsi_cb = 0; u32 __dsi_cv = 0;
3145 #define DSI_FLUSH(ch) \
3146 if (__dsi_cb > 0) { \
3147 /*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \
3148 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \
3149 __dsi_cb = __dsi_cv = 0; \
3152 #define DSI_PUSH(ch, data) \
3154 __dsi_cv |= (data) << (__dsi_cb * 8); \
3155 /*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \
3156 if (++__dsi_cb > 3) \
3160 static int dsi_update_screen_l4(struct omap_dss_device *dssdev,
3161 int x, int y, int w, int h)
3163 /* Note: supports only 24bit colors in 32bit container */
3165 int fifo_stalls = 0;
3166 int max_dsi_packet_size;
3167 int max_data_per_packet;
3168 int max_pixels_per_packet;
3170 int bytespp = dssdev->ctrl.pixel_size / 8;
3176 struct omap_overlay *ovl;
3180 DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n",
3183 ovl = dssdev->manager->overlays[0];
3185 if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U)
3188 if (dssdev->ctrl.pixel_size != 24)
3191 scr_width = ovl->info.screen_width;
3192 data = ovl->info.vaddr;
3194 start_offset = scr_width * y + x;
3195 horiz_inc = scr_width - w;
3198 /* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes
3201 /* When using CPU, max long packet size is TX buffer size */
3202 max_dsi_packet_size = dsi.vc[0].fifo_size * 32 * 4;
3204 /* we seem to get better perf if we divide the tx fifo to half,
3205 and while the other half is being sent, we fill the other half
3206 max_dsi_packet_size /= 2; */
3208 max_data_per_packet = max_dsi_packet_size - 4 - 1;
3210 max_pixels_per_packet = max_data_per_packet / bytespp;
3212 DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet);
3214 pixels_left = w * h;
3216 DSSDBG("total pixels %d\n", pixels_left);
3218 data += start_offset;
3220 while (pixels_left > 0) {
3221 /* 0x2c = write_memory_start */
3222 /* 0x3c = write_memory_continue */
3223 u8 dcs_cmd = first ? 0x2c : 0x3c;
3229 /* using fifo not empty */
3230 /* TX_FIFO_NOT_EMPTY */
3231 while (FLD_GET(dsi_read_reg(DSI_VC_CTRL(0)), 5, 5)) {
3233 if (fifo_stalls > 0xfffff) {
3234 DSSERR("fifo stalls overflow, pixels left %d\n",
3242 /* using fifo emptiness */
3243 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 <
3244 max_dsi_packet_size) {
3246 if (fifo_stalls > 0xfffff) {
3247 DSSERR("fifo stalls overflow, pixels left %d\n",
3254 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 == 0) {
3256 if (fifo_stalls > 0xfffff) {
3257 DSSERR("fifo stalls overflow, pixels left %d\n",
3264 pixels = min(max_pixels_per_packet, pixels_left);
3266 pixels_left -= pixels;
3268 dsi_vc_write_long_header(0, DSI_DT_DCS_LONG_WRITE,
3269 1 + pixels * bytespp, 0);
3271 DSI_PUSH(0, dcs_cmd);
3273 while (pixels-- > 0) {
3274 u32 pix = __raw_readl(data++);
3276 DSI_PUSH(0, (pix >> 16) & 0xff);
3277 DSI_PUSH(0, (pix >> 8) & 0xff);
3278 DSI_PUSH(0, (pix >> 0) & 0xff);
3281 if (current_x == x+w) {
3293 static void dsi_update_screen_dispc(struct omap_dss_device *dssdev,
3294 u16 x, u16 y, u16 w, u16 h)
3300 unsigned packet_payload;
3301 unsigned packet_len;
3304 const unsigned channel = dsi.update_channel;
3305 /* line buffer is 1024 x 24bits */
3306 /* XXX: for some reason using full buffer size causes considerable TX
3307 * slowdown with update sizes that fill the whole buffer */
3308 const unsigned line_buf_size = 1023 * 3;
3310 DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
3313 dsi_vc_config_vp(channel);
3315 bytespp = dssdev->ctrl.pixel_size / 8;
3316 bytespl = w * bytespp;
3317 bytespf = bytespl * h;
3319 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
3320 * number of lines in a packet. See errata about VP_CLK_RATIO */
3322 if (bytespf < line_buf_size)
3323 packet_payload = bytespf;
3325 packet_payload = (line_buf_size) / bytespl * bytespl;
3327 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
3328 total_len = (bytespf / packet_payload) * packet_len;
3330 if (bytespf % packet_payload)
3331 total_len += (bytespf % packet_payload) + 1;
3333 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
3334 dsi_write_reg(DSI_VC_TE(channel), l);
3336 dsi_vc_write_long_header(channel, DSI_DT_DCS_LONG_WRITE, packet_len, 0);
3339 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
3341 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
3342 dsi_write_reg(DSI_VC_TE(channel), l);
3344 /* We put SIDLEMODE to no-idle for the duration of the transfer,
3345 * because DSS interrupts are not capable of waking up the CPU and the
3346 * framedone interrupt could be delayed for quite a long time. I think
3347 * the same goes for any DSS interrupts, but for some reason I have not
3348 * seen the problem anywhere else than here.
3350 dispc_disable_sidle();
3352 dsi_perf_mark_start();
3354 r = queue_delayed_work(dsi.workqueue, &dsi.framedone_timeout_work,
3355 msecs_to_jiffies(250));
3358 dss_start_update(dssdev);
3360 if (dsi.te_enabled) {
3361 /* disable LP_RX_TO, so that we can receive TE. Time to wait
3362 * for TE is longer than the timer allows */
3363 REG_FLD_MOD(DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
3365 dsi_vc_send_bta(channel);
3367 #ifdef DSI_CATCH_MISSING_TE
3368 mod_timer(&dsi.te_timer, jiffies + msecs_to_jiffies(250));
3373 #ifdef DSI_CATCH_MISSING_TE
3374 static void dsi_te_timeout(unsigned long arg)
3376 DSSERR("TE not received for 250ms!\n");
3380 static void dsi_handle_framedone(int error)
3382 /* SIDLEMODE back to smart-idle */
3383 dispc_enable_sidle();
3385 if (dsi.te_enabled) {
3386 /* enable LP_RX_TO again after the TE */
3387 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
3390 dsi.framedone_callback(error, dsi.framedone_data);
3393 dsi_perf_show("DISPC");
3396 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
3398 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
3399 * 250ms which would conflict with this timeout work. What should be
3400 * done is first cancel the transfer on the HW, and then cancel the
3401 * possibly scheduled framedone work. However, cancelling the transfer
3402 * on the HW is buggy, and would probably require resetting the whole
3405 DSSERR("Framedone not received for 250ms!\n");
3407 dsi_handle_framedone(-ETIMEDOUT);
3410 static void dsi_framedone_irq_callback(void *data, u32 mask)
3412 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
3413 * turns itself off. However, DSI still has the pixels in its buffers,
3414 * and is sending the data.
3417 __cancel_delayed_work(&dsi.framedone_timeout_work);
3419 dsi_handle_framedone(0);
3421 #ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
3422 dispc_fake_vsync_irq();
3426 int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
3427 u16 *x, u16 *y, u16 *w, u16 *h,
3428 bool enlarge_update_area)
3432 dssdev->driver->get_resolution(dssdev, &dw, &dh);
3434 if (*x > dw || *y > dh)
3446 if (*w == 0 || *h == 0)
3449 dsi_perf_mark_setup();
3451 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
3452 dss_setup_partial_planes(dssdev, x, y, w, h,
3453 enlarge_update_area);
3454 dispc_set_lcd_size(dssdev->manager->id, *w, *h);
3459 EXPORT_SYMBOL(omap_dsi_prepare_update);
3461 int omap_dsi_update(struct omap_dss_device *dssdev,
3463 u16 x, u16 y, u16 w, u16 h,
3464 void (*callback)(int, void *), void *data)
3466 dsi.update_channel = channel;
3468 /* OMAP DSS cannot send updates of odd widths.
3469 * omap_dsi_prepare_update() makes the widths even, but add a BUG_ON
3470 * here to make sure we catch erroneous updates. Otherwise we'll only
3471 * see rather obscure HW error happening, as DSS halts. */
3474 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
3475 dsi.framedone_callback = callback;
3476 dsi.framedone_data = data;
3478 dsi.update_region.x = x;
3479 dsi.update_region.y = y;
3480 dsi.update_region.w = w;
3481 dsi.update_region.h = h;
3482 dsi.update_region.device = dssdev;
3484 dsi_update_screen_dispc(dssdev, x, y, w, h);
3488 r = dsi_update_screen_l4(dssdev, x, y, w, h);
3492 dsi_perf_show("L4");
3498 EXPORT_SYMBOL(omap_dsi_update);
3502 static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
3506 r = omap_dispc_register_isr(dsi_framedone_irq_callback, NULL,
3507 DISPC_IRQ_FRAMEDONE);
3509 DSSERR("can't get FRAMEDONE irq\n");
3513 dispc_set_lcd_display_type(dssdev->manager->id,
3514 OMAP_DSS_LCD_DISPLAY_TFT);
3516 dispc_set_parallel_interface_mode(dssdev->manager->id,
3517 OMAP_DSS_PARALLELMODE_DSI);
3518 dispc_enable_fifohandcheck(dssdev->manager->id, 1);
3520 dispc_set_tft_data_lines(dssdev->manager->id, dssdev->ctrl.pixel_size);
3523 struct omap_video_timings timings = {
3532 dispc_set_lcd_timings(dssdev->manager->id, &timings);
3538 static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev)
3540 omap_dispc_unregister_isr(dsi_framedone_irq_callback, NULL,
3541 DISPC_IRQ_FRAMEDONE);
3544 static int dsi_configure_dsi_clocks(struct omap_dss_device *dssdev)
3546 struct dsi_clock_info cinfo;
3549 /* we always use DSS_CLK_SYSCK as input clock */
3550 cinfo.use_sys_clk = true;
3551 cinfo.regn = dssdev->clocks.dsi.regn;
3552 cinfo.regm = dssdev->clocks.dsi.regm;
3553 cinfo.regm_dispc = dssdev->clocks.dsi.regm_dispc;
3554 cinfo.regm_dsi = dssdev->clocks.dsi.regm_dsi;
3555 r = dsi_calc_clock_rates(dssdev, &cinfo);
3557 DSSERR("Failed to calc dsi clocks\n");
3561 r = dsi_pll_set_clock_div(&cinfo);
3563 DSSERR("Failed to set dsi clocks\n");
3570 static int dsi_configure_dispc_clocks(struct omap_dss_device *dssdev)
3572 struct dispc_clock_info dispc_cinfo;
3574 unsigned long long fck;
3576 fck = dsi_get_pll_hsdiv_dispc_rate();
3578 dispc_cinfo.lck_div = dssdev->clocks.dispc.channel.lck_div;
3579 dispc_cinfo.pck_div = dssdev->clocks.dispc.channel.pck_div;
3581 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
3583 DSSERR("Failed to calc dispc clocks\n");
3587 r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
3589 DSSERR("Failed to set dispc clocks\n");
3596 static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
3600 /* The SCPClk is required for both PLL and CIO registers on OMAP4 */
3601 /* CIO_CLK_ICG, enable L3 clk to CIO */
3602 REG_FLD_MOD(DSI_CLK_CTRL, 1, 14, 14);
3604 _dsi_print_reset_status();
3606 r = dsi_pll_init(dssdev, true, true);
3610 r = dsi_configure_dsi_clocks(dssdev);
3614 dss_select_dispc_clk_source(dssdev->clocks.dispc.dispc_fclk_src);
3615 dss_select_dsi_clk_source(dssdev->clocks.dsi.dsi_fclk_src);
3616 dss_select_lcd_clk_source(dssdev->manager->id,
3617 dssdev->clocks.dispc.channel.lcd_clk_src);
3621 r = dsi_configure_dispc_clocks(dssdev);
3625 r = dsi_complexio_init(dssdev);
3629 _dsi_print_reset_status();
3631 dsi_proto_timings(dssdev);
3632 dsi_set_lp_clk_divisor(dssdev);
3635 _dsi_print_reset_status();
3637 r = dsi_proto_config(dssdev);
3641 /* enable interface */
3642 dsi_vc_enable(0, 1);
3643 dsi_vc_enable(1, 1);
3644 dsi_vc_enable(2, 1);
3645 dsi_vc_enable(3, 1);
3647 dsi_force_tx_stop_mode_io();
3651 dsi_complexio_uninit();
3653 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
3654 dss_select_dsi_clk_source(OMAP_DSS_CLK_SRC_FCK);
3656 dsi_pll_uninit(true);
3661 static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev,
3662 bool disconnect_lanes)
3664 if (!dsi.ulps_enabled)
3667 /* disable interface */
3669 dsi_vc_enable(0, 0);
3670 dsi_vc_enable(1, 0);
3671 dsi_vc_enable(2, 0);
3672 dsi_vc_enable(3, 0);
3674 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
3675 dss_select_dsi_clk_source(OMAP_DSS_CLK_SRC_FCK);
3676 dsi_complexio_uninit();
3677 dsi_pll_uninit(disconnect_lanes);
3680 static int dsi_core_init(void)
3683 REG_FLD_MOD(DSI_SYSCONFIG, 1, 0, 0);
3686 REG_FLD_MOD(DSI_SYSCONFIG, 1, 2, 2);
3688 /* SIDLEMODE smart-idle */
3689 REG_FLD_MOD(DSI_SYSCONFIG, 2, 4, 3);
3691 _dsi_initialize_irq();
3696 int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
3700 DSSDBG("dsi_display_enable\n");
3702 WARN_ON(!dsi_bus_is_locked());
3704 mutex_lock(&dsi.lock);
3706 r = omap_dss_start_device(dssdev);
3708 DSSERR("failed to start device\n");
3713 dsi_enable_pll_clock(1);
3721 r = dsi_display_init_dispc(dssdev);
3725 r = dsi_display_init_dsi(dssdev);
3729 mutex_unlock(&dsi.lock);
3734 dsi_display_uninit_dispc(dssdev);
3737 dsi_enable_pll_clock(0);
3738 omap_dss_stop_device(dssdev);
3740 mutex_unlock(&dsi.lock);
3741 DSSDBG("dsi_display_enable FAILED\n");
3744 EXPORT_SYMBOL(omapdss_dsi_display_enable);
3746 void omapdss_dsi_display_disable(struct omap_dss_device *dssdev,
3747 bool disconnect_lanes)
3749 DSSDBG("dsi_display_disable\n");
3751 WARN_ON(!dsi_bus_is_locked());
3753 mutex_lock(&dsi.lock);
3755 dsi_display_uninit_dispc(dssdev);
3757 dsi_display_uninit_dsi(dssdev, disconnect_lanes);
3760 dsi_enable_pll_clock(0);
3762 omap_dss_stop_device(dssdev);
3764 mutex_unlock(&dsi.lock);
3766 EXPORT_SYMBOL(omapdss_dsi_display_disable);
3768 int omapdss_dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
3770 dsi.te_enabled = enable;
3773 EXPORT_SYMBOL(omapdss_dsi_enable_te);
3775 void dsi_get_overlay_fifo_thresholds(enum omap_plane plane,
3776 u32 fifo_size, enum omap_burst_size *burst_size,
3777 u32 *fifo_low, u32 *fifo_high)
3779 unsigned burst_size_bytes;
3781 *burst_size = OMAP_DSS_BURST_16x32;
3782 burst_size_bytes = 16 * 32 / 8;
3784 *fifo_high = fifo_size - burst_size_bytes;
3785 *fifo_low = fifo_size - burst_size_bytes * 2;
3788 int dsi_init_display(struct omap_dss_device *dssdev)
3790 DSSDBG("DSI init\n");
3792 /* XXX these should be figured out dynamically */
3793 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
3794 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
3796 if (dsi.vdds_dsi_reg == NULL) {
3797 struct regulator *vdds_dsi;
3799 vdds_dsi = regulator_get(&dsi.pdev->dev, "vdds_dsi");
3801 if (IS_ERR(vdds_dsi)) {
3802 DSSERR("can't get VDDS_DSI regulator\n");
3803 return PTR_ERR(vdds_dsi);
3806 dsi.vdds_dsi_reg = vdds_dsi;
3812 int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
3816 for (i = 0; i < ARRAY_SIZE(dsi.vc); i++) {
3817 if (!dsi.vc[i].dssdev) {
3818 dsi.vc[i].dssdev = dssdev;
3824 DSSERR("cannot get VC for display %s", dssdev->name);
3827 EXPORT_SYMBOL(omap_dsi_request_vc);
3829 int omap_dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id)
3831 if (vc_id < 0 || vc_id > 3) {
3832 DSSERR("VC ID out of range\n");
3836 if (channel < 0 || channel > 3) {
3837 DSSERR("Virtual Channel out of range\n");
3841 if (dsi.vc[channel].dssdev != dssdev) {
3842 DSSERR("Virtual Channel not allocated to display %s\n",
3847 dsi.vc[channel].vc_id = vc_id;
3851 EXPORT_SYMBOL(omap_dsi_set_vc_id);
3853 void omap_dsi_release_vc(struct omap_dss_device *dssdev, int channel)
3855 if ((channel >= 0 && channel <= 3) &&
3856 dsi.vc[channel].dssdev == dssdev) {
3857 dsi.vc[channel].dssdev = NULL;
3858 dsi.vc[channel].vc_id = 0;
3861 EXPORT_SYMBOL(omap_dsi_release_vc);
3863 void dsi_wait_pll_hsdiv_dispc_active(void)
3865 if (wait_for_bit_change(DSI_PLL_STATUS, 7, 1) != 1)
3866 DSSERR("%s (%s) not active\n",
3867 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
3868 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC));
3871 void dsi_wait_pll_hsdiv_dsi_active(void)
3873 if (wait_for_bit_change(DSI_PLL_STATUS, 8, 1) != 1)
3874 DSSERR("%s (%s) not active\n",
3875 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
3876 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI));
3879 static void dsi_calc_clock_param_ranges(void)
3881 dsi.regn_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGN);
3882 dsi.regm_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM);
3883 dsi.regm_dispc_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM_DISPC);
3884 dsi.regm_dsi_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM_DSI);
3885 dsi.fint_min = dss_feat_get_param_min(FEAT_PARAM_DSIPLL_FINT);
3886 dsi.fint_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_FINT);
3887 dsi.lpdiv_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_LPDIV);
3890 static int dsi_init(struct platform_device *pdev)
3894 struct resource *dsi_mem;
3896 spin_lock_init(&dsi.irq_lock);
3897 spin_lock_init(&dsi.errors_lock);
3900 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
3901 spin_lock_init(&dsi.irq_stats_lock);
3902 dsi.irq_stats.last_reset = jiffies;
3905 mutex_init(&dsi.lock);
3906 sema_init(&dsi.bus_lock, 1);
3908 dsi.workqueue = create_singlethread_workqueue("dsi");
3909 if (dsi.workqueue == NULL)
3912 INIT_DELAYED_WORK_DEFERRABLE(&dsi.framedone_timeout_work,
3913 dsi_framedone_timeout_work_callback);
3915 #ifdef DSI_CATCH_MISSING_TE
3916 init_timer(&dsi.te_timer);
3917 dsi.te_timer.function = dsi_te_timeout;
3918 dsi.te_timer.data = 0;
3920 dsi_mem = platform_get_resource(dsi.pdev, IORESOURCE_MEM, 0);
3922 DSSERR("can't get IORESOURCE_MEM DSI\n");
3926 dsi.base = ioremap(dsi_mem->start, resource_size(dsi_mem));
3928 DSSERR("can't ioremap DSI\n");
3932 dsi.irq = platform_get_irq(dsi.pdev, 0);
3934 DSSERR("platform_get_irq failed\n");
3939 r = request_irq(dsi.irq, omap_dsi_irq_handler, IRQF_SHARED,
3940 "OMAP DSI1", dsi.pdev);
3942 DSSERR("request_irq failed\n");
3946 /* DSI VCs initialization */
3947 for (i = 0; i < ARRAY_SIZE(dsi.vc); i++) {
3948 dsi.vc[i].mode = DSI_VC_MODE_L4;
3949 dsi.vc[i].dssdev = NULL;
3950 dsi.vc[i].vc_id = 0;
3953 dsi_calc_clock_param_ranges();
3957 rev = dsi_read_reg(DSI_REVISION);
3958 dev_dbg(&pdev->dev, "OMAP DSI rev %d.%d\n",
3959 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
3967 destroy_workqueue(dsi.workqueue);
3971 static void dsi_exit(void)
3973 if (dsi.vdds_dsi_reg != NULL) {
3974 regulator_put(dsi.vdds_dsi_reg);
3975 dsi.vdds_dsi_reg = NULL;
3978 free_irq(dsi.irq, dsi.pdev);
3981 destroy_workqueue(dsi.workqueue);
3983 DSSDBG("omap_dsi_exit\n");
3986 /* DSI1 HW IP initialisation */
3987 static int omap_dsi1hw_probe(struct platform_device *pdev)
3993 DSSERR("Failed to initialize DSI\n");
4000 static int omap_dsi1hw_remove(struct platform_device *pdev)
4006 static struct platform_driver omap_dsi1hw_driver = {
4007 .probe = omap_dsi1hw_probe,
4008 .remove = omap_dsi1hw_remove,
4010 .name = "omapdss_dsi1",
4011 .owner = THIS_MODULE,
4015 int dsi_init_platform_driver(void)
4017 return platform_driver_register(&omap_dsi1hw_driver);
4020 void dsi_uninit_platform_driver(void)
4022 return platform_driver_unregister(&omap_dsi1hw_driver);