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;
309 unsigned scp_clk_refcount;
313 static unsigned int dsi_perf;
314 module_param_named(dsi_perf, dsi_perf, bool, 0644);
317 static inline void dsi_write_reg(const struct dsi_reg idx, u32 val)
319 __raw_writel(val, dsi.base + idx.idx);
322 static inline u32 dsi_read_reg(const struct dsi_reg idx)
324 return __raw_readl(dsi.base + idx.idx);
328 void dsi_save_context(void)
332 void dsi_restore_context(void)
336 void dsi_bus_lock(void)
340 EXPORT_SYMBOL(dsi_bus_lock);
342 void dsi_bus_unlock(void)
346 EXPORT_SYMBOL(dsi_bus_unlock);
348 static bool dsi_bus_is_locked(void)
350 return dsi.bus_lock.count == 0;
353 static void dsi_completion_handler(void *data, u32 mask)
355 complete((struct completion *)data);
358 static inline int wait_for_bit_change(const struct dsi_reg idx, int bitnum,
363 while (REG_GET(idx, bitnum, bitnum) != value) {
372 static void dsi_perf_mark_setup(void)
374 dsi.perf_setup_time = ktime_get();
377 static void dsi_perf_mark_start(void)
379 dsi.perf_start_time = ktime_get();
382 static void dsi_perf_show(const char *name)
384 ktime_t t, setup_time, trans_time;
386 u32 setup_us, trans_us, total_us;
393 setup_time = ktime_sub(dsi.perf_start_time, dsi.perf_setup_time);
394 setup_us = (u32)ktime_to_us(setup_time);
398 trans_time = ktime_sub(t, dsi.perf_start_time);
399 trans_us = (u32)ktime_to_us(trans_time);
403 total_us = setup_us + trans_us;
405 total_bytes = dsi.update_region.w *
406 dsi.update_region.h *
407 dsi.update_region.device->ctrl.pixel_size / 8;
409 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
410 "%u bytes, %u kbytes/sec\n",
415 1000*1000 / total_us,
417 total_bytes * 1000 / total_us);
420 #define dsi_perf_mark_setup()
421 #define dsi_perf_mark_start()
422 #define dsi_perf_show(x)
425 static void print_irq_status(u32 status)
431 if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0)
434 printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status);
437 if (status & DSI_IRQ_##x) \
463 static void print_irq_status_vc(int channel, u32 status)
469 if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
472 printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status);
475 if (status & DSI_VC_IRQ_##x) \
492 static void print_irq_status_cio(u32 status)
497 printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status);
500 if (status & DSI_CIO_IRQ_##x) \
514 PIS(ERRCONTENTIONLP0_1);
515 PIS(ERRCONTENTIONLP1_1);
516 PIS(ERRCONTENTIONLP0_2);
517 PIS(ERRCONTENTIONLP1_2);
518 PIS(ERRCONTENTIONLP0_3);
519 PIS(ERRCONTENTIONLP1_3);
520 PIS(ULPSACTIVENOT_ALL0);
521 PIS(ULPSACTIVENOT_ALL1);
527 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
528 static void dsi_collect_irq_stats(u32 irqstatus, u32 *vcstatus, u32 ciostatus)
532 spin_lock(&dsi.irq_stats_lock);
534 dsi.irq_stats.irq_count++;
535 dss_collect_irq_stats(irqstatus, dsi.irq_stats.dsi_irqs);
537 for (i = 0; i < 4; ++i)
538 dss_collect_irq_stats(vcstatus[i], dsi.irq_stats.vc_irqs[i]);
540 dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);
542 spin_unlock(&dsi.irq_stats_lock);
545 #define dsi_collect_irq_stats(irqstatus, vcstatus, ciostatus)
548 static int debug_irq;
550 static void dsi_handle_irq_errors(u32 irqstatus, u32 *vcstatus, u32 ciostatus)
554 if (irqstatus & DSI_IRQ_ERROR_MASK) {
555 DSSERR("DSI error, irqstatus %x\n", irqstatus);
556 print_irq_status(irqstatus);
557 spin_lock(&dsi.errors_lock);
558 dsi.errors |= irqstatus & DSI_IRQ_ERROR_MASK;
559 spin_unlock(&dsi.errors_lock);
560 } else if (debug_irq) {
561 print_irq_status(irqstatus);
564 for (i = 0; i < 4; ++i) {
565 if (vcstatus[i] & DSI_VC_IRQ_ERROR_MASK) {
566 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
568 print_irq_status_vc(i, vcstatus[i]);
569 } else if (debug_irq) {
570 print_irq_status_vc(i, vcstatus[i]);
574 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
575 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
576 print_irq_status_cio(ciostatus);
577 } else if (debug_irq) {
578 print_irq_status_cio(ciostatus);
582 static void dsi_call_isrs(struct dsi_isr_data *isr_array,
583 unsigned isr_array_size, u32 irqstatus)
585 struct dsi_isr_data *isr_data;
588 for (i = 0; i < isr_array_size; i++) {
589 isr_data = &isr_array[i];
590 if (isr_data->isr && isr_data->mask & irqstatus)
591 isr_data->isr(isr_data->arg, irqstatus);
595 static void dsi_handle_isrs(struct dsi_isr_tables *isr_tables,
596 u32 irqstatus, u32 *vcstatus, u32 ciostatus)
600 dsi_call_isrs(isr_tables->isr_table,
601 ARRAY_SIZE(isr_tables->isr_table),
604 for (i = 0; i < 4; ++i) {
605 if (vcstatus[i] == 0)
607 dsi_call_isrs(isr_tables->isr_table_vc[i],
608 ARRAY_SIZE(isr_tables->isr_table_vc[i]),
613 dsi_call_isrs(isr_tables->isr_table_cio,
614 ARRAY_SIZE(isr_tables->isr_table_cio),
618 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
620 u32 irqstatus, vcstatus[4], ciostatus;
623 spin_lock(&dsi.irq_lock);
625 irqstatus = dsi_read_reg(DSI_IRQSTATUS);
627 /* IRQ is not for us */
629 spin_unlock(&dsi.irq_lock);
633 dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
634 /* flush posted write */
635 dsi_read_reg(DSI_IRQSTATUS);
637 for (i = 0; i < 4; ++i) {
638 if ((irqstatus & (1 << i)) == 0) {
643 vcstatus[i] = dsi_read_reg(DSI_VC_IRQSTATUS(i));
645 dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus[i]);
646 /* flush posted write */
647 dsi_read_reg(DSI_VC_IRQSTATUS(i));
650 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
651 ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
653 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
654 /* flush posted write */
655 dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
660 #ifdef DSI_CATCH_MISSING_TE
661 if (irqstatus & DSI_IRQ_TE_TRIGGER)
662 del_timer(&dsi.te_timer);
665 /* make a copy and unlock, so that isrs can unregister
667 memcpy(&dsi.isr_tables_copy, &dsi.isr_tables, sizeof(dsi.isr_tables));
669 spin_unlock(&dsi.irq_lock);
671 dsi_handle_isrs(&dsi.isr_tables_copy, irqstatus, vcstatus, ciostatus);
673 dsi_handle_irq_errors(irqstatus, vcstatus, ciostatus);
675 dsi_collect_irq_stats(irqstatus, vcstatus, ciostatus);
680 /* dsi.irq_lock has to be locked by the caller */
681 static void _omap_dsi_configure_irqs(struct dsi_isr_data *isr_array,
682 unsigned isr_array_size, u32 default_mask,
683 const struct dsi_reg enable_reg,
684 const struct dsi_reg status_reg)
686 struct dsi_isr_data *isr_data;
693 for (i = 0; i < isr_array_size; i++) {
694 isr_data = &isr_array[i];
696 if (isr_data->isr == NULL)
699 mask |= isr_data->mask;
702 old_mask = dsi_read_reg(enable_reg);
703 /* clear the irqstatus for newly enabled irqs */
704 dsi_write_reg(status_reg, (mask ^ old_mask) & mask);
705 dsi_write_reg(enable_reg, mask);
707 /* flush posted writes */
708 dsi_read_reg(enable_reg);
709 dsi_read_reg(status_reg);
712 /* dsi.irq_lock has to be locked by the caller */
713 static void _omap_dsi_set_irqs(void)
715 u32 mask = DSI_IRQ_ERROR_MASK;
716 #ifdef DSI_CATCH_MISSING_TE
717 mask |= DSI_IRQ_TE_TRIGGER;
719 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table,
720 ARRAY_SIZE(dsi.isr_tables.isr_table), mask,
721 DSI_IRQENABLE, DSI_IRQSTATUS);
724 /* dsi.irq_lock has to be locked by the caller */
725 static void _omap_dsi_set_irqs_vc(int vc)
727 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table_vc[vc],
728 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[vc]),
729 DSI_VC_IRQ_ERROR_MASK,
730 DSI_VC_IRQENABLE(vc), DSI_VC_IRQSTATUS(vc));
733 /* dsi.irq_lock has to be locked by the caller */
734 static void _omap_dsi_set_irqs_cio(void)
736 _omap_dsi_configure_irqs(dsi.isr_tables.isr_table_cio,
737 ARRAY_SIZE(dsi.isr_tables.isr_table_cio),
738 DSI_CIO_IRQ_ERROR_MASK,
739 DSI_COMPLEXIO_IRQ_ENABLE, DSI_COMPLEXIO_IRQ_STATUS);
742 static void _dsi_initialize_irq(void)
747 spin_lock_irqsave(&dsi.irq_lock, flags);
749 memset(&dsi.isr_tables, 0, sizeof(dsi.isr_tables));
751 _omap_dsi_set_irqs();
752 for (vc = 0; vc < 4; ++vc)
753 _omap_dsi_set_irqs_vc(vc);
754 _omap_dsi_set_irqs_cio();
756 spin_unlock_irqrestore(&dsi.irq_lock, flags);
759 static int _dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
760 struct dsi_isr_data *isr_array, unsigned isr_array_size)
762 struct dsi_isr_data *isr_data;
768 /* check for duplicate entry and find a free slot */
770 for (i = 0; i < isr_array_size; i++) {
771 isr_data = &isr_array[i];
773 if (isr_data->isr == isr && isr_data->arg == arg &&
774 isr_data->mask == mask) {
778 if (isr_data->isr == NULL && free_idx == -1)
785 isr_data = &isr_array[free_idx];
788 isr_data->mask = mask;
793 static int _dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask,
794 struct dsi_isr_data *isr_array, unsigned isr_array_size)
796 struct dsi_isr_data *isr_data;
799 for (i = 0; i < isr_array_size; i++) {
800 isr_data = &isr_array[i];
801 if (isr_data->isr != isr || isr_data->arg != arg ||
802 isr_data->mask != mask)
805 isr_data->isr = NULL;
806 isr_data->arg = NULL;
815 static int dsi_register_isr(omap_dsi_isr_t isr, void *arg, u32 mask)
820 spin_lock_irqsave(&dsi.irq_lock, flags);
822 r = _dsi_register_isr(isr, arg, mask, dsi.isr_tables.isr_table,
823 ARRAY_SIZE(dsi.isr_tables.isr_table));
826 _omap_dsi_set_irqs();
828 spin_unlock_irqrestore(&dsi.irq_lock, flags);
833 static int dsi_unregister_isr(omap_dsi_isr_t isr, void *arg, u32 mask)
838 spin_lock_irqsave(&dsi.irq_lock, flags);
840 r = _dsi_unregister_isr(isr, arg, mask, dsi.isr_tables.isr_table,
841 ARRAY_SIZE(dsi.isr_tables.isr_table));
844 _omap_dsi_set_irqs();
846 spin_unlock_irqrestore(&dsi.irq_lock, flags);
851 static int dsi_register_isr_vc(int channel, omap_dsi_isr_t isr, void *arg,
857 spin_lock_irqsave(&dsi.irq_lock, flags);
859 r = _dsi_register_isr(isr, arg, mask,
860 dsi.isr_tables.isr_table_vc[channel],
861 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[channel]));
864 _omap_dsi_set_irqs_vc(channel);
866 spin_unlock_irqrestore(&dsi.irq_lock, flags);
871 static int dsi_unregister_isr_vc(int channel, omap_dsi_isr_t isr, void *arg,
877 spin_lock_irqsave(&dsi.irq_lock, flags);
879 r = _dsi_unregister_isr(isr, arg, mask,
880 dsi.isr_tables.isr_table_vc[channel],
881 ARRAY_SIZE(dsi.isr_tables.isr_table_vc[channel]));
884 _omap_dsi_set_irqs_vc(channel);
886 spin_unlock_irqrestore(&dsi.irq_lock, flags);
891 static int dsi_register_isr_cio(omap_dsi_isr_t isr, void *arg, u32 mask)
896 spin_lock_irqsave(&dsi.irq_lock, flags);
898 r = _dsi_register_isr(isr, arg, mask, dsi.isr_tables.isr_table_cio,
899 ARRAY_SIZE(dsi.isr_tables.isr_table_cio));
902 _omap_dsi_set_irqs_cio();
904 spin_unlock_irqrestore(&dsi.irq_lock, flags);
909 static int dsi_unregister_isr_cio(omap_dsi_isr_t isr, void *arg, u32 mask)
914 spin_lock_irqsave(&dsi.irq_lock, flags);
916 r = _dsi_unregister_isr(isr, arg, mask, dsi.isr_tables.isr_table_cio,
917 ARRAY_SIZE(dsi.isr_tables.isr_table_cio));
920 _omap_dsi_set_irqs_cio();
922 spin_unlock_irqrestore(&dsi.irq_lock, flags);
927 static u32 dsi_get_errors(void)
931 spin_lock_irqsave(&dsi.errors_lock, flags);
934 spin_unlock_irqrestore(&dsi.errors_lock, flags);
938 /* DSI func clock. this could also be dsi_pll_hsdiv_dsi_clk */
939 static inline void enable_clocks(bool enable)
942 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
944 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
947 /* source clock for DSI PLL. this could also be PCLKFREE */
948 static inline void dsi_enable_pll_clock(bool enable)
951 dss_clk_enable(DSS_CLK_SYSCK);
953 dss_clk_disable(DSS_CLK_SYSCK);
955 if (enable && dsi.pll_locked) {
956 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1)
957 DSSERR("cannot lock PLL when enabling clocks\n");
962 static void _dsi_print_reset_status(void)
970 /* A dummy read using the SCP interface to any DSIPHY register is
971 * required after DSIPHY reset to complete the reset of the DSI complex
973 l = dsi_read_reg(DSI_DSIPHY_CFG5);
975 printk(KERN_DEBUG "DSI resets: ");
977 l = dsi_read_reg(DSI_PLL_STATUS);
978 printk("PLL (%d) ", FLD_GET(l, 0, 0));
980 l = dsi_read_reg(DSI_COMPLEXIO_CFG1);
981 printk("CIO (%d) ", FLD_GET(l, 29, 29));
983 if (dss_has_feature(FEAT_DSI_REVERSE_TXCLKESC)) {
993 l = dsi_read_reg(DSI_DSIPHY_CFG5);
994 printk("PHY (%x%x%x, %d, %d, %d)\n",
1000 FLD_GET(l, 31, 31));
1003 #define _dsi_print_reset_status()
1006 static inline int dsi_if_enable(bool enable)
1008 DSSDBG("dsi_if_enable(%d)\n", enable);
1010 enable = enable ? 1 : 0;
1011 REG_FLD_MOD(DSI_CTRL, enable, 0, 0); /* IF_EN */
1013 if (wait_for_bit_change(DSI_CTRL, 0, enable) != enable) {
1014 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
1021 unsigned long dsi_get_pll_hsdiv_dispc_rate(void)
1023 return dsi.current_cinfo.dsi_pll_hsdiv_dispc_clk;
1026 static unsigned long dsi_get_pll_hsdiv_dsi_rate(void)
1028 return dsi.current_cinfo.dsi_pll_hsdiv_dsi_clk;
1031 static unsigned long dsi_get_txbyteclkhs(void)
1033 return dsi.current_cinfo.clkin4ddr / 16;
1036 static unsigned long dsi_fclk_rate(void)
1040 if (dss_get_dsi_clk_source() == OMAP_DSS_CLK_SRC_FCK) {
1041 /* DSI FCLK source is DSS_CLK_FCK */
1042 r = dss_clk_get_rate(DSS_CLK_FCK);
1044 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
1045 r = dsi_get_pll_hsdiv_dsi_rate();
1051 static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev)
1053 unsigned long dsi_fclk;
1054 unsigned lp_clk_div;
1055 unsigned long lp_clk;
1057 lp_clk_div = dssdev->clocks.dsi.lp_clk_div;
1059 if (lp_clk_div == 0 || lp_clk_div > dsi.lpdiv_max)
1062 dsi_fclk = dsi_fclk_rate();
1064 lp_clk = dsi_fclk / 2 / lp_clk_div;
1066 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
1067 dsi.current_cinfo.lp_clk = lp_clk;
1068 dsi.current_cinfo.lp_clk_div = lp_clk_div;
1070 REG_FLD_MOD(DSI_CLK_CTRL, lp_clk_div, 12, 0); /* LP_CLK_DIVISOR */
1072 REG_FLD_MOD(DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0,
1073 21, 21); /* LP_RX_SYNCHRO_ENABLE */
1078 static void dsi_enable_scp_clk(void)
1080 if (dsi.scp_clk_refcount++ == 0)
1081 REG_FLD_MOD(DSI_CLK_CTRL, 1, 14, 14); /* CIO_CLK_ICG */
1084 static void dsi_disable_scp_clk(void)
1086 WARN_ON(dsi.scp_clk_refcount == 0);
1087 if (--dsi.scp_clk_refcount == 0)
1088 REG_FLD_MOD(DSI_CLK_CTRL, 0, 14, 14); /* CIO_CLK_ICG */
1091 enum dsi_pll_power_state {
1092 DSI_PLL_POWER_OFF = 0x0,
1093 DSI_PLL_POWER_ON_HSCLK = 0x1,
1094 DSI_PLL_POWER_ON_ALL = 0x2,
1095 DSI_PLL_POWER_ON_DIV = 0x3,
1098 static int dsi_pll_power(enum dsi_pll_power_state state)
1102 /* DSI-PLL power command 0x3 is not working */
1103 if (dss_has_feature(FEAT_DSI_PLL_PWR_BUG) &&
1104 state == DSI_PLL_POWER_ON_DIV)
1105 state = DSI_PLL_POWER_ON_ALL;
1107 REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30); /* PLL_PWR_CMD */
1109 /* PLL_PWR_STATUS */
1110 while (FLD_GET(dsi_read_reg(DSI_CLK_CTRL), 29, 28) != state) {
1112 DSSERR("Failed to set DSI PLL power mode to %d\n",
1122 /* calculate clock rates using dividers in cinfo */
1123 static int dsi_calc_clock_rates(struct omap_dss_device *dssdev,
1124 struct dsi_clock_info *cinfo)
1126 if (cinfo->regn == 0 || cinfo->regn > dsi.regn_max)
1129 if (cinfo->regm == 0 || cinfo->regm > dsi.regm_max)
1132 if (cinfo->regm_dispc > dsi.regm_dispc_max)
1135 if (cinfo->regm_dsi > dsi.regm_dsi_max)
1138 if (cinfo->use_sys_clk) {
1139 cinfo->clkin = dss_clk_get_rate(DSS_CLK_SYSCK);
1140 /* XXX it is unclear if highfreq should be used
1141 * with DSS_SYS_CLK source also */
1142 cinfo->highfreq = 0;
1144 cinfo->clkin = dispc_pclk_rate(dssdev->manager->id);
1146 if (cinfo->clkin < 32000000)
1147 cinfo->highfreq = 0;
1149 cinfo->highfreq = 1;
1152 cinfo->fint = cinfo->clkin / (cinfo->regn * (cinfo->highfreq ? 2 : 1));
1154 if (cinfo->fint > dsi.fint_max || cinfo->fint < dsi.fint_min)
1157 cinfo->clkin4ddr = 2 * cinfo->regm * cinfo->fint;
1159 if (cinfo->clkin4ddr > 1800 * 1000 * 1000)
1162 if (cinfo->regm_dispc > 0)
1163 cinfo->dsi_pll_hsdiv_dispc_clk =
1164 cinfo->clkin4ddr / cinfo->regm_dispc;
1166 cinfo->dsi_pll_hsdiv_dispc_clk = 0;
1168 if (cinfo->regm_dsi > 0)
1169 cinfo->dsi_pll_hsdiv_dsi_clk =
1170 cinfo->clkin4ddr / cinfo->regm_dsi;
1172 cinfo->dsi_pll_hsdiv_dsi_clk = 0;
1177 int dsi_pll_calc_clock_div_pck(bool is_tft, unsigned long req_pck,
1178 struct dsi_clock_info *dsi_cinfo,
1179 struct dispc_clock_info *dispc_cinfo)
1181 struct dsi_clock_info cur, best;
1182 struct dispc_clock_info best_dispc;
1183 int min_fck_per_pck;
1185 unsigned long dss_sys_clk, max_dss_fck;
1187 dss_sys_clk = dss_clk_get_rate(DSS_CLK_SYSCK);
1189 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
1191 if (req_pck == dsi.cache_req_pck &&
1192 dsi.cache_cinfo.clkin == dss_sys_clk) {
1193 DSSDBG("DSI clock info found from cache\n");
1194 *dsi_cinfo = dsi.cache_cinfo;
1195 dispc_find_clk_divs(is_tft, req_pck,
1196 dsi_cinfo->dsi_pll_hsdiv_dispc_clk, dispc_cinfo);
1200 min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK;
1202 if (min_fck_per_pck &&
1203 req_pck * min_fck_per_pck > max_dss_fck) {
1204 DSSERR("Requested pixel clock not possible with the current "
1205 "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning "
1206 "the constraint off.\n");
1207 min_fck_per_pck = 0;
1210 DSSDBG("dsi_pll_calc\n");
1213 memset(&best, 0, sizeof(best));
1214 memset(&best_dispc, 0, sizeof(best_dispc));
1216 memset(&cur, 0, sizeof(cur));
1217 cur.clkin = dss_sys_clk;
1218 cur.use_sys_clk = 1;
1221 /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */
1222 /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */
1223 /* To reduce PLL lock time, keep Fint high (around 2 MHz) */
1224 for (cur.regn = 1; cur.regn < dsi.regn_max; ++cur.regn) {
1225 if (cur.highfreq == 0)
1226 cur.fint = cur.clkin / cur.regn;
1228 cur.fint = cur.clkin / (2 * cur.regn);
1230 if (cur.fint > dsi.fint_max || cur.fint < dsi.fint_min)
1233 /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */
1234 for (cur.regm = 1; cur.regm < dsi.regm_max; ++cur.regm) {
1237 a = 2 * cur.regm * (cur.clkin/1000);
1238 b = cur.regn * (cur.highfreq + 1);
1239 cur.clkin4ddr = a / b * 1000;
1241 if (cur.clkin4ddr > 1800 * 1000 * 1000)
1244 /* dsi_pll_hsdiv_dispc_clk(MHz) =
1245 * DSIPHY(MHz) / regm_dispc < 173MHz/186Mhz */
1246 for (cur.regm_dispc = 1; cur.regm_dispc < dsi.regm_dispc_max;
1248 struct dispc_clock_info cur_dispc;
1249 cur.dsi_pll_hsdiv_dispc_clk =
1250 cur.clkin4ddr / cur.regm_dispc;
1252 /* this will narrow down the search a bit,
1253 * but still give pixclocks below what was
1255 if (cur.dsi_pll_hsdiv_dispc_clk < req_pck)
1258 if (cur.dsi_pll_hsdiv_dispc_clk > max_dss_fck)
1261 if (min_fck_per_pck &&
1262 cur.dsi_pll_hsdiv_dispc_clk <
1263 req_pck * min_fck_per_pck)
1268 dispc_find_clk_divs(is_tft, req_pck,
1269 cur.dsi_pll_hsdiv_dispc_clk,
1272 if (abs(cur_dispc.pck - req_pck) <
1273 abs(best_dispc.pck - req_pck)) {
1275 best_dispc = cur_dispc;
1277 if (cur_dispc.pck == req_pck)
1285 if (min_fck_per_pck) {
1286 DSSERR("Could not find suitable clock settings.\n"
1287 "Turning FCK/PCK constraint off and"
1289 min_fck_per_pck = 0;
1293 DSSERR("Could not find suitable clock settings.\n");
1298 /* dsi_pll_hsdiv_dsi_clk (regm_dsi) is not used */
1300 best.dsi_pll_hsdiv_dsi_clk = 0;
1305 *dispc_cinfo = best_dispc;
1307 dsi.cache_req_pck = req_pck;
1308 dsi.cache_clk_freq = 0;
1309 dsi.cache_cinfo = best;
1314 int dsi_pll_set_clock_div(struct dsi_clock_info *cinfo)
1319 u8 regn_start, regn_end, regm_start, regm_end;
1320 u8 regm_dispc_start, regm_dispc_end, regm_dsi_start, regm_dsi_end;
1324 dsi.current_cinfo.use_sys_clk = cinfo->use_sys_clk;
1325 dsi.current_cinfo.highfreq = cinfo->highfreq;
1327 dsi.current_cinfo.fint = cinfo->fint;
1328 dsi.current_cinfo.clkin4ddr = cinfo->clkin4ddr;
1329 dsi.current_cinfo.dsi_pll_hsdiv_dispc_clk =
1330 cinfo->dsi_pll_hsdiv_dispc_clk;
1331 dsi.current_cinfo.dsi_pll_hsdiv_dsi_clk =
1332 cinfo->dsi_pll_hsdiv_dsi_clk;
1334 dsi.current_cinfo.regn = cinfo->regn;
1335 dsi.current_cinfo.regm = cinfo->regm;
1336 dsi.current_cinfo.regm_dispc = cinfo->regm_dispc;
1337 dsi.current_cinfo.regm_dsi = cinfo->regm_dsi;
1339 DSSDBG("DSI Fint %ld\n", cinfo->fint);
1341 DSSDBG("clkin (%s) rate %ld, highfreq %d\n",
1342 cinfo->use_sys_clk ? "dss_sys_clk" : "pclkfree",
1346 /* DSIPHY == CLKIN4DDR */
1347 DSSDBG("CLKIN4DDR = 2 * %d / %d * %lu / %d = %lu\n",
1351 cinfo->highfreq + 1,
1354 DSSDBG("Data rate on 1 DSI lane %ld Mbps\n",
1355 cinfo->clkin4ddr / 1000 / 1000 / 2);
1357 DSSDBG("Clock lane freq %ld Hz\n", cinfo->clkin4ddr / 4);
1359 DSSDBG("regm_dispc = %d, %s (%s) = %lu\n", cinfo->regm_dispc,
1360 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1361 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1362 cinfo->dsi_pll_hsdiv_dispc_clk);
1363 DSSDBG("regm_dsi = %d, %s (%s) = %lu\n", cinfo->regm_dsi,
1364 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1365 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1366 cinfo->dsi_pll_hsdiv_dsi_clk);
1368 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGN, ®n_start, ®n_end);
1369 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM, ®m_start, ®m_end);
1370 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM_DISPC, ®m_dispc_start,
1372 dss_feat_get_reg_field(FEAT_REG_DSIPLL_REGM_DSI, ®m_dsi_start,
1375 REG_FLD_MOD(DSI_PLL_CONTROL, 0, 0, 0); /* DSI_PLL_AUTOMODE = manual */
1377 l = dsi_read_reg(DSI_PLL_CONFIGURATION1);
1378 l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */
1380 l = FLD_MOD(l, cinfo->regn - 1, regn_start, regn_end);
1382 l = FLD_MOD(l, cinfo->regm, regm_start, regm_end);
1384 l = FLD_MOD(l, cinfo->regm_dispc > 0 ? cinfo->regm_dispc - 1 : 0,
1385 regm_dispc_start, regm_dispc_end);
1386 /* DSIPROTO_CLOCK_DIV */
1387 l = FLD_MOD(l, cinfo->regm_dsi > 0 ? cinfo->regm_dsi - 1 : 0,
1388 regm_dsi_start, regm_dsi_end);
1389 dsi_write_reg(DSI_PLL_CONFIGURATION1, l);
1391 BUG_ON(cinfo->fint < dsi.fint_min || cinfo->fint > dsi.fint_max);
1393 if (dss_has_feature(FEAT_DSI_PLL_FREQSEL)) {
1394 f = cinfo->fint < 1000000 ? 0x3 :
1395 cinfo->fint < 1250000 ? 0x4 :
1396 cinfo->fint < 1500000 ? 0x5 :
1397 cinfo->fint < 1750000 ? 0x6 :
1401 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1403 if (dss_has_feature(FEAT_DSI_PLL_FREQSEL))
1404 l = FLD_MOD(l, f, 4, 1); /* DSI_PLL_FREQSEL */
1405 l = FLD_MOD(l, cinfo->use_sys_clk ? 0 : 1,
1406 11, 11); /* DSI_PLL_CLKSEL */
1407 l = FLD_MOD(l, cinfo->highfreq,
1408 12, 12); /* DSI_PLL_HIGHFREQ */
1409 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1410 l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */
1411 l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */
1412 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1414 REG_FLD_MOD(DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */
1416 if (wait_for_bit_change(DSI_PLL_GO, 0, 0) != 0) {
1417 DSSERR("dsi pll go bit not going down.\n");
1422 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) {
1423 DSSERR("cannot lock PLL\n");
1430 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1431 l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */
1432 l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */
1433 l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */
1434 l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */
1435 l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */
1436 l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */
1437 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1438 l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */
1439 l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */
1440 l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */
1441 l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */
1442 l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */
1443 l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */
1444 l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */
1445 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1447 DSSDBG("PLL config done\n");
1452 int dsi_pll_init(struct omap_dss_device *dssdev, bool enable_hsclk,
1456 enum dsi_pll_power_state pwstate;
1458 DSSDBG("PLL init\n");
1460 if (dsi.vdds_dsi_reg == NULL) {
1461 struct regulator *vdds_dsi;
1463 vdds_dsi = regulator_get(&dsi.pdev->dev, "vdds_dsi");
1465 if (IS_ERR(vdds_dsi)) {
1466 DSSERR("can't get VDDS_DSI regulator\n");
1467 return PTR_ERR(vdds_dsi);
1470 dsi.vdds_dsi_reg = vdds_dsi;
1474 dsi_enable_pll_clock(1);
1476 * Note: SCP CLK is not required on OMAP3, but it is required on OMAP4.
1478 dsi_enable_scp_clk();
1480 if (!dsi.vdds_dsi_enabled) {
1481 r = regulator_enable(dsi.vdds_dsi_reg);
1484 dsi.vdds_dsi_enabled = true;
1487 /* XXX PLL does not come out of reset without this... */
1488 dispc_pck_free_enable(1);
1490 if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) {
1491 DSSERR("PLL not coming out of reset.\n");
1493 dispc_pck_free_enable(0);
1497 /* XXX ... but if left on, we get problems when planes do not
1498 * fill the whole display. No idea about this */
1499 dispc_pck_free_enable(0);
1501 if (enable_hsclk && enable_hsdiv)
1502 pwstate = DSI_PLL_POWER_ON_ALL;
1503 else if (enable_hsclk)
1504 pwstate = DSI_PLL_POWER_ON_HSCLK;
1505 else if (enable_hsdiv)
1506 pwstate = DSI_PLL_POWER_ON_DIV;
1508 pwstate = DSI_PLL_POWER_OFF;
1510 r = dsi_pll_power(pwstate);
1515 DSSDBG("PLL init done\n");
1519 if (dsi.vdds_dsi_enabled) {
1520 regulator_disable(dsi.vdds_dsi_reg);
1521 dsi.vdds_dsi_enabled = false;
1524 dsi_disable_scp_clk();
1526 dsi_enable_pll_clock(0);
1530 void dsi_pll_uninit(bool disconnect_lanes)
1533 dsi_pll_power(DSI_PLL_POWER_OFF);
1534 if (disconnect_lanes) {
1535 WARN_ON(!dsi.vdds_dsi_enabled);
1536 regulator_disable(dsi.vdds_dsi_reg);
1537 dsi.vdds_dsi_enabled = false;
1540 dsi_disable_scp_clk();
1542 dsi_enable_pll_clock(0);
1544 DSSDBG("PLL uninit done\n");
1547 void dsi_dump_clocks(struct seq_file *s)
1549 struct dsi_clock_info *cinfo = &dsi.current_cinfo;
1550 enum omap_dss_clk_source dispc_clk_src, dsi_clk_src;
1552 dispc_clk_src = dss_get_dispc_clk_source();
1553 dsi_clk_src = dss_get_dsi_clk_source();
1557 seq_printf(s, "- DSI PLL -\n");
1559 seq_printf(s, "dsi pll source = %s\n",
1560 cinfo->use_sys_clk ? "dss_sys_clk" : "pclkfree");
1562 seq_printf(s, "Fint\t\t%-16luregn %u\n", cinfo->fint, cinfo->regn);
1564 seq_printf(s, "CLKIN4DDR\t%-16luregm %u\n",
1565 cinfo->clkin4ddr, cinfo->regm);
1567 seq_printf(s, "%s (%s)\t%-16luregm_dispc %u\t(%s)\n",
1568 dss_get_generic_clk_source_name(dispc_clk_src),
1569 dss_feat_get_clk_source_name(dispc_clk_src),
1570 cinfo->dsi_pll_hsdiv_dispc_clk,
1572 dispc_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1575 seq_printf(s, "%s (%s)\t%-16luregm_dsi %u\t(%s)\n",
1576 dss_get_generic_clk_source_name(dsi_clk_src),
1577 dss_feat_get_clk_source_name(dsi_clk_src),
1578 cinfo->dsi_pll_hsdiv_dsi_clk,
1580 dsi_clk_src == OMAP_DSS_CLK_SRC_FCK ?
1583 seq_printf(s, "- DSI -\n");
1585 seq_printf(s, "dsi fclk source = %s (%s)\n",
1586 dss_get_generic_clk_source_name(dsi_clk_src),
1587 dss_feat_get_clk_source_name(dsi_clk_src));
1589 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate());
1591 seq_printf(s, "DDR_CLK\t\t%lu\n",
1592 cinfo->clkin4ddr / 4);
1594 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs());
1596 seq_printf(s, "LP_CLK\t\t%lu\n", cinfo->lp_clk);
1598 seq_printf(s, "VP_CLK\t\t%lu\n"
1600 dispc_lclk_rate(OMAP_DSS_CHANNEL_LCD),
1601 dispc_pclk_rate(OMAP_DSS_CHANNEL_LCD));
1606 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
1607 void dsi_dump_irqs(struct seq_file *s)
1609 unsigned long flags;
1610 struct dsi_irq_stats stats;
1612 spin_lock_irqsave(&dsi.irq_stats_lock, flags);
1614 stats = dsi.irq_stats;
1615 memset(&dsi.irq_stats, 0, sizeof(dsi.irq_stats));
1616 dsi.irq_stats.last_reset = jiffies;
1618 spin_unlock_irqrestore(&dsi.irq_stats_lock, flags);
1620 seq_printf(s, "period %u ms\n",
1621 jiffies_to_msecs(jiffies - stats.last_reset));
1623 seq_printf(s, "irqs %d\n", stats.irq_count);
1625 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1627 seq_printf(s, "-- DSI interrupts --\n");
1643 PIS(LDO_POWER_GOOD);
1648 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1649 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1650 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1651 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1652 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1654 seq_printf(s, "-- VC interrupts --\n");
1663 PIS(PP_BUSY_CHANGE);
1667 seq_printf(s, "%-20s %10d\n", #x, \
1668 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1670 seq_printf(s, "-- CIO interrupts --\n");
1683 PIS(ERRCONTENTIONLP0_1);
1684 PIS(ERRCONTENTIONLP1_1);
1685 PIS(ERRCONTENTIONLP0_2);
1686 PIS(ERRCONTENTIONLP1_2);
1687 PIS(ERRCONTENTIONLP0_3);
1688 PIS(ERRCONTENTIONLP1_3);
1689 PIS(ULPSACTIVENOT_ALL0);
1690 PIS(ULPSACTIVENOT_ALL1);
1695 void dsi_dump_regs(struct seq_file *s)
1697 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r))
1699 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
1701 DUMPREG(DSI_REVISION);
1702 DUMPREG(DSI_SYSCONFIG);
1703 DUMPREG(DSI_SYSSTATUS);
1704 DUMPREG(DSI_IRQSTATUS);
1705 DUMPREG(DSI_IRQENABLE);
1707 DUMPREG(DSI_COMPLEXIO_CFG1);
1708 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1709 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1710 DUMPREG(DSI_CLK_CTRL);
1711 DUMPREG(DSI_TIMING1);
1712 DUMPREG(DSI_TIMING2);
1713 DUMPREG(DSI_VM_TIMING1);
1714 DUMPREG(DSI_VM_TIMING2);
1715 DUMPREG(DSI_VM_TIMING3);
1716 DUMPREG(DSI_CLK_TIMING);
1717 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1718 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1719 DUMPREG(DSI_COMPLEXIO_CFG2);
1720 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1721 DUMPREG(DSI_VM_TIMING4);
1722 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1723 DUMPREG(DSI_VM_TIMING5);
1724 DUMPREG(DSI_VM_TIMING6);
1725 DUMPREG(DSI_VM_TIMING7);
1726 DUMPREG(DSI_STOPCLK_TIMING);
1728 DUMPREG(DSI_VC_CTRL(0));
1729 DUMPREG(DSI_VC_TE(0));
1730 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1731 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1732 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1733 DUMPREG(DSI_VC_IRQSTATUS(0));
1734 DUMPREG(DSI_VC_IRQENABLE(0));
1736 DUMPREG(DSI_VC_CTRL(1));
1737 DUMPREG(DSI_VC_TE(1));
1738 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1739 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1740 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1741 DUMPREG(DSI_VC_IRQSTATUS(1));
1742 DUMPREG(DSI_VC_IRQENABLE(1));
1744 DUMPREG(DSI_VC_CTRL(2));
1745 DUMPREG(DSI_VC_TE(2));
1746 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1747 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1748 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1749 DUMPREG(DSI_VC_IRQSTATUS(2));
1750 DUMPREG(DSI_VC_IRQENABLE(2));
1752 DUMPREG(DSI_VC_CTRL(3));
1753 DUMPREG(DSI_VC_TE(3));
1754 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1755 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1756 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1757 DUMPREG(DSI_VC_IRQSTATUS(3));
1758 DUMPREG(DSI_VC_IRQENABLE(3));
1760 DUMPREG(DSI_DSIPHY_CFG0);
1761 DUMPREG(DSI_DSIPHY_CFG1);
1762 DUMPREG(DSI_DSIPHY_CFG2);
1763 DUMPREG(DSI_DSIPHY_CFG5);
1765 DUMPREG(DSI_PLL_CONTROL);
1766 DUMPREG(DSI_PLL_STATUS);
1767 DUMPREG(DSI_PLL_GO);
1768 DUMPREG(DSI_PLL_CONFIGURATION1);
1769 DUMPREG(DSI_PLL_CONFIGURATION2);
1771 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
1775 enum dsi_cio_power_state {
1776 DSI_COMPLEXIO_POWER_OFF = 0x0,
1777 DSI_COMPLEXIO_POWER_ON = 0x1,
1778 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1781 static int dsi_cio_power(enum dsi_cio_power_state state)
1786 REG_FLD_MOD(DSI_COMPLEXIO_CFG1, state, 28, 27);
1789 while (FLD_GET(dsi_read_reg(DSI_COMPLEXIO_CFG1), 26, 25) != state) {
1791 DSSERR("failed to set complexio power state to "
1801 static void dsi_set_lane_config(struct omap_dss_device *dssdev)
1805 int clk_lane = dssdev->phy.dsi.clk_lane;
1806 int data1_lane = dssdev->phy.dsi.data1_lane;
1807 int data2_lane = dssdev->phy.dsi.data2_lane;
1808 int clk_pol = dssdev->phy.dsi.clk_pol;
1809 int data1_pol = dssdev->phy.dsi.data1_pol;
1810 int data2_pol = dssdev->phy.dsi.data2_pol;
1812 r = dsi_read_reg(DSI_COMPLEXIO_CFG1);
1813 r = FLD_MOD(r, clk_lane, 2, 0);
1814 r = FLD_MOD(r, clk_pol, 3, 3);
1815 r = FLD_MOD(r, data1_lane, 6, 4);
1816 r = FLD_MOD(r, data1_pol, 7, 7);
1817 r = FLD_MOD(r, data2_lane, 10, 8);
1818 r = FLD_MOD(r, data2_pol, 11, 11);
1819 dsi_write_reg(DSI_COMPLEXIO_CFG1, r);
1821 /* The configuration of the DSI complex I/O (number of data lanes,
1822 position, differential order) should not be changed while
1823 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for
1824 the hardware to take into account a new configuration of the complex
1825 I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to
1826 follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1,
1827 then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set
1828 DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the
1829 DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the
1830 DSI complex I/O configuration is unknown. */
1833 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1834 REG_FLD_MOD(DSI_CTRL, 0, 0, 0);
1835 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20);
1836 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1840 static inline unsigned ns2ddr(unsigned ns)
1842 /* convert time in ns to ddr ticks, rounding up */
1843 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1844 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1847 static inline unsigned ddr2ns(unsigned ddr)
1849 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1850 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1853 static void dsi_cio_timings(void)
1856 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1857 u32 tlpx_half, tclk_trail, tclk_zero;
1860 /* calculate timings */
1862 /* 1 * DDR_CLK = 2 * UI */
1864 /* min 40ns + 4*UI max 85ns + 6*UI */
1865 ths_prepare = ns2ddr(70) + 2;
1867 /* min 145ns + 10*UI */
1868 ths_prepare_ths_zero = ns2ddr(175) + 2;
1870 /* min max(8*UI, 60ns+4*UI) */
1871 ths_trail = ns2ddr(60) + 5;
1874 ths_exit = ns2ddr(145);
1877 tlpx_half = ns2ddr(25);
1880 tclk_trail = ns2ddr(60) + 2;
1882 /* min 38ns, max 95ns */
1883 tclk_prepare = ns2ddr(65);
1885 /* min tclk-prepare + tclk-zero = 300ns */
1886 tclk_zero = ns2ddr(260);
1888 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1889 ths_prepare, ddr2ns(ths_prepare),
1890 ths_prepare_ths_zero, ddr2ns(ths_prepare_ths_zero));
1891 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1892 ths_trail, ddr2ns(ths_trail),
1893 ths_exit, ddr2ns(ths_exit));
1895 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1896 "tclk_zero %u (%uns)\n",
1897 tlpx_half, ddr2ns(tlpx_half),
1898 tclk_trail, ddr2ns(tclk_trail),
1899 tclk_zero, ddr2ns(tclk_zero));
1900 DSSDBG("tclk_prepare %u (%uns)\n",
1901 tclk_prepare, ddr2ns(tclk_prepare));
1903 /* program timings */
1905 r = dsi_read_reg(DSI_DSIPHY_CFG0);
1906 r = FLD_MOD(r, ths_prepare, 31, 24);
1907 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1908 r = FLD_MOD(r, ths_trail, 15, 8);
1909 r = FLD_MOD(r, ths_exit, 7, 0);
1910 dsi_write_reg(DSI_DSIPHY_CFG0, r);
1912 r = dsi_read_reg(DSI_DSIPHY_CFG1);
1913 r = FLD_MOD(r, tlpx_half, 22, 16);
1914 r = FLD_MOD(r, tclk_trail, 15, 8);
1915 r = FLD_MOD(r, tclk_zero, 7, 0);
1916 dsi_write_reg(DSI_DSIPHY_CFG1, r);
1918 r = dsi_read_reg(DSI_DSIPHY_CFG2);
1919 r = FLD_MOD(r, tclk_prepare, 7, 0);
1920 dsi_write_reg(DSI_DSIPHY_CFG2, r);
1923 static void dsi_cio_enable_lane_override(struct omap_dss_device *dssdev,
1924 enum dsi_lane lanes)
1926 int clk_lane = dssdev->phy.dsi.clk_lane;
1927 int data1_lane = dssdev->phy.dsi.data1_lane;
1928 int data2_lane = dssdev->phy.dsi.data2_lane;
1929 int clk_pol = dssdev->phy.dsi.clk_pol;
1930 int data1_pol = dssdev->phy.dsi.data1_pol;
1931 int data2_pol = dssdev->phy.dsi.data2_pol;
1935 if (lanes & DSI_CLK_P)
1936 l |= 1 << ((clk_lane - 1) * 2 + (clk_pol ? 0 : 1));
1937 if (lanes & DSI_CLK_N)
1938 l |= 1 << ((clk_lane - 1) * 2 + (clk_pol ? 1 : 0));
1940 if (lanes & DSI_DATA1_P)
1941 l |= 1 << ((data1_lane - 1) * 2 + (data1_pol ? 0 : 1));
1942 if (lanes & DSI_DATA1_N)
1943 l |= 1 << ((data1_lane - 1) * 2 + (data1_pol ? 1 : 0));
1945 if (lanes & DSI_DATA2_P)
1946 l |= 1 << ((data2_lane - 1) * 2 + (data2_pol ? 0 : 1));
1947 if (lanes & DSI_DATA2_N)
1948 l |= 1 << ((data2_lane - 1) * 2 + (data2_pol ? 1 : 0));
1951 * Bits in REGLPTXSCPDAT4TO0DXDY:
1957 /* Set the lane override configuration */
1958 REG_FLD_MOD(DSI_DSIPHY_CFG10, l, 22, 17); /* REGLPTXSCPDAT4TO0DXDY */
1960 /* Enable lane override */
1961 REG_FLD_MOD(DSI_DSIPHY_CFG10, 1, 27, 27); /* ENLPTXSCPDAT */
1964 static void dsi_cio_disable_lane_override(void)
1966 /* Disable lane override */
1967 REG_FLD_MOD(DSI_DSIPHY_CFG10, 0, 27, 27); /* ENLPTXSCPDAT */
1968 /* Reset the lane override configuration */
1969 REG_FLD_MOD(DSI_DSIPHY_CFG10, 0, 22, 17); /* REGLPTXSCPDAT4TO0DXDY */
1972 static int dsi_cio_init(struct omap_dss_device *dssdev)
1979 if (dsi.ulps_enabled)
1980 DSSDBG("manual ulps exit\n");
1982 /* A dummy read using the SCP interface to any DSIPHY register is
1983 * required after DSIPHY reset to complete the reset of the DSI complex
1985 dsi_read_reg(DSI_DSIPHY_CFG5);
1987 if (wait_for_bit_change(DSI_DSIPHY_CFG5, 30, 1) != 1) {
1988 DSSERR("ComplexIO PHY not coming out of reset.\n");
1993 dsi_set_lane_config(dssdev);
1995 dsi_if_enable(true);
1996 dsi_if_enable(false);
1997 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
1999 /* set TX STOP MODE timer to maximum for this operation */
2000 l = dsi_read_reg(DSI_TIMING1);
2001 l = FLD_MOD(l, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2002 l = FLD_MOD(l, 1, 14, 14); /* STOP_STATE_X16_IO */
2003 l = FLD_MOD(l, 1, 13, 13); /* STOP_STATE_X4_IO */
2004 l = FLD_MOD(l, 0x1fff, 12, 0); /* STOP_STATE_COUNTER_IO */
2005 dsi_write_reg(DSI_TIMING1, l);
2007 if (dsi.ulps_enabled) {
2008 /* ULPS is exited by Mark-1 state for 1ms, followed by
2009 * stop state. DSS HW cannot do this via the normal
2010 * ULPS exit sequence, as after reset the DSS HW thinks
2011 * that we are not in ULPS mode, and refuses to send the
2012 * sequence. So we need to send the ULPS exit sequence
2016 dsi_cio_enable_lane_override(dssdev,
2017 DSI_CLK_P | DSI_DATA1_P | DSI_DATA2_P);
2020 r = dsi_cio_power(DSI_COMPLEXIO_POWER_ON);
2024 if (dsi.ulps_enabled) {
2025 /* Keep Mark-1 state for 1ms (as per DSI spec) */
2026 ktime_t wait = ns_to_ktime(1000 * 1000);
2027 set_current_state(TASK_UNINTERRUPTIBLE);
2028 schedule_hrtimeout(&wait, HRTIMER_MODE_REL);
2030 /* Disable the override. The lanes should be set to Mark-11
2031 * state by the HW */
2032 dsi_cio_disable_lane_override();
2035 /* FORCE_TX_STOP_MODE_IO */
2036 REG_FLD_MOD(DSI_TIMING1, 0, 15, 15);
2038 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
2039 DSSERR("ComplexIO not coming out of reset.\n");
2046 dsi.ulps_enabled = false;
2048 DSSDBG("CIO init done\n");
2053 static void dsi_cio_uninit(void)
2055 dsi_cio_power(DSI_COMPLEXIO_POWER_OFF);
2058 static int _dsi_wait_reset(void)
2062 while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) {
2064 DSSERR("soft reset failed\n");
2073 static int _dsi_reset(void)
2076 REG_FLD_MOD(DSI_SYSCONFIG, 1, 1, 1);
2077 return _dsi_wait_reset();
2080 static void dsi_config_tx_fifo(enum fifo_size size1, enum fifo_size size2,
2081 enum fifo_size size3, enum fifo_size size4)
2087 dsi.vc[0].fifo_size = size1;
2088 dsi.vc[1].fifo_size = size2;
2089 dsi.vc[2].fifo_size = size3;
2090 dsi.vc[3].fifo_size = size4;
2092 for (i = 0; i < 4; i++) {
2094 int size = dsi.vc[i].fifo_size;
2096 if (add + size > 4) {
2097 DSSERR("Illegal FIFO configuration\n");
2101 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2103 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
2107 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, r);
2110 static void dsi_config_rx_fifo(enum fifo_size size1, enum fifo_size size2,
2111 enum fifo_size size3, enum fifo_size size4)
2117 dsi.vc[0].fifo_size = size1;
2118 dsi.vc[1].fifo_size = size2;
2119 dsi.vc[2].fifo_size = size3;
2120 dsi.vc[3].fifo_size = size4;
2122 for (i = 0; i < 4; i++) {
2124 int size = dsi.vc[i].fifo_size;
2126 if (add + size > 4) {
2127 DSSERR("Illegal FIFO configuration\n");
2131 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
2133 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
2137 dsi_write_reg(DSI_RX_FIFO_VC_SIZE, r);
2140 static int dsi_force_tx_stop_mode_io(void)
2144 r = dsi_read_reg(DSI_TIMING1);
2145 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2146 dsi_write_reg(DSI_TIMING1, r);
2148 if (wait_for_bit_change(DSI_TIMING1, 15, 0) != 0) {
2149 DSSERR("TX_STOP bit not going down\n");
2156 static bool dsi_vc_is_enabled(int channel)
2158 return REG_GET(DSI_VC_CTRL(channel), 0, 0);
2161 static void dsi_packet_sent_handler_vp(void *data, u32 mask)
2163 const int channel = dsi.update_channel;
2164 u8 bit = dsi.te_enabled ? 30 : 31;
2166 if (REG_GET(DSI_VC_TE(channel), bit, bit) == 0)
2167 complete((struct completion *)data);
2170 static int dsi_sync_vc_vp(int channel)
2175 DECLARE_COMPLETION_ONSTACK(completion);
2177 bit = dsi.te_enabled ? 30 : 31;
2179 r = dsi_register_isr_vc(channel, dsi_packet_sent_handler_vp,
2180 &completion, DSI_VC_IRQ_PACKET_SENT);
2184 /* Wait for completion only if TE_EN/TE_START is still set */
2185 if (REG_GET(DSI_VC_TE(channel), bit, bit)) {
2186 if (wait_for_completion_timeout(&completion,
2187 msecs_to_jiffies(10)) == 0) {
2188 DSSERR("Failed to complete previous frame transfer\n");
2194 dsi_unregister_isr_vc(channel, dsi_packet_sent_handler_vp,
2195 &completion, DSI_VC_IRQ_PACKET_SENT);
2199 dsi_unregister_isr_vc(channel, dsi_packet_sent_handler_vp, &completion,
2200 DSI_VC_IRQ_PACKET_SENT);
2205 static void dsi_packet_sent_handler_l4(void *data, u32 mask)
2207 const int channel = dsi.update_channel;
2209 if (REG_GET(DSI_VC_CTRL(channel), 5, 5) == 0)
2210 complete((struct completion *)data);
2213 static int dsi_sync_vc_l4(int channel)
2217 DECLARE_COMPLETION_ONSTACK(completion);
2219 r = dsi_register_isr_vc(channel, dsi_packet_sent_handler_l4,
2220 &completion, DSI_VC_IRQ_PACKET_SENT);
2224 /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */
2225 if (REG_GET(DSI_VC_CTRL(channel), 5, 5)) {
2226 if (wait_for_completion_timeout(&completion,
2227 msecs_to_jiffies(10)) == 0) {
2228 DSSERR("Failed to complete previous l4 transfer\n");
2234 dsi_unregister_isr_vc(channel, dsi_packet_sent_handler_l4,
2235 &completion, DSI_VC_IRQ_PACKET_SENT);
2239 dsi_unregister_isr_vc(channel, dsi_packet_sent_handler_l4,
2240 &completion, DSI_VC_IRQ_PACKET_SENT);
2245 static int dsi_sync_vc(int channel)
2247 WARN_ON(!dsi_bus_is_locked());
2249 WARN_ON(in_interrupt());
2251 if (!dsi_vc_is_enabled(channel))
2254 switch (dsi.vc[channel].mode) {
2255 case DSI_VC_MODE_VP:
2256 return dsi_sync_vc_vp(channel);
2257 case DSI_VC_MODE_L4:
2258 return dsi_sync_vc_l4(channel);
2264 static int dsi_vc_enable(int channel, bool enable)
2266 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
2269 enable = enable ? 1 : 0;
2271 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 0, 0);
2273 if (wait_for_bit_change(DSI_VC_CTRL(channel), 0, enable) != enable) {
2274 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
2281 static void dsi_vc_initial_config(int channel)
2285 DSSDBGF("%d", channel);
2287 r = dsi_read_reg(DSI_VC_CTRL(channel));
2289 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
2290 DSSERR("VC(%d) busy when trying to configure it!\n",
2293 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
2294 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
2295 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
2296 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
2297 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
2298 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
2299 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
2300 if (dss_has_feature(FEAT_DSI_VC_OCP_WIDTH))
2301 r = FLD_MOD(r, 3, 11, 10); /* OCP_WIDTH = 32 bit */
2303 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
2304 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
2306 dsi_write_reg(DSI_VC_CTRL(channel), r);
2309 static int dsi_vc_config_l4(int channel)
2311 if (dsi.vc[channel].mode == DSI_VC_MODE_L4)
2314 DSSDBGF("%d", channel);
2316 dsi_sync_vc(channel);
2318 dsi_vc_enable(channel, 0);
2321 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
2322 DSSERR("vc(%d) busy when trying to config for L4\n", channel);
2326 REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */
2328 /* DCS_CMD_ENABLE */
2329 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC))
2330 REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 30, 30);
2332 dsi_vc_enable(channel, 1);
2334 dsi.vc[channel].mode = DSI_VC_MODE_L4;
2339 static int dsi_vc_config_vp(int channel)
2341 if (dsi.vc[channel].mode == DSI_VC_MODE_VP)
2344 DSSDBGF("%d", channel);
2346 dsi_sync_vc(channel);
2348 dsi_vc_enable(channel, 0);
2351 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
2352 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
2356 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 1, 1); /* SOURCE, 1 = video port */
2358 /* DCS_CMD_ENABLE */
2359 if (dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC))
2360 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 30, 30);
2362 dsi_vc_enable(channel, 1);
2364 dsi.vc[channel].mode = DSI_VC_MODE_VP;
2370 void omapdss_dsi_vc_enable_hs(int channel, bool enable)
2372 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
2374 WARN_ON(!dsi_bus_is_locked());
2376 dsi_vc_enable(channel, 0);
2379 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 9, 9);
2381 dsi_vc_enable(channel, 1);
2384 dsi_force_tx_stop_mode_io();
2386 EXPORT_SYMBOL(omapdss_dsi_vc_enable_hs);
2388 static void dsi_vc_flush_long_data(int channel)
2390 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2392 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2393 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
2397 (val >> 24) & 0xff);
2401 static void dsi_show_rx_ack_with_err(u16 err)
2403 DSSERR("\tACK with ERROR (%#x):\n", err);
2405 DSSERR("\t\tSoT Error\n");
2407 DSSERR("\t\tSoT Sync Error\n");
2409 DSSERR("\t\tEoT Sync Error\n");
2411 DSSERR("\t\tEscape Mode Entry Command Error\n");
2413 DSSERR("\t\tLP Transmit Sync Error\n");
2415 DSSERR("\t\tHS Receive Timeout Error\n");
2417 DSSERR("\t\tFalse Control Error\n");
2419 DSSERR("\t\t(reserved7)\n");
2421 DSSERR("\t\tECC Error, single-bit (corrected)\n");
2423 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
2424 if (err & (1 << 10))
2425 DSSERR("\t\tChecksum Error\n");
2426 if (err & (1 << 11))
2427 DSSERR("\t\tData type not recognized\n");
2428 if (err & (1 << 12))
2429 DSSERR("\t\tInvalid VC ID\n");
2430 if (err & (1 << 13))
2431 DSSERR("\t\tInvalid Transmission Length\n");
2432 if (err & (1 << 14))
2433 DSSERR("\t\t(reserved14)\n");
2434 if (err & (1 << 15))
2435 DSSERR("\t\tDSI Protocol Violation\n");
2438 static u16 dsi_vc_flush_receive_data(int channel)
2440 /* RX_FIFO_NOT_EMPTY */
2441 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2444 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2445 DSSERR("\trawval %#08x\n", val);
2446 dt = FLD_GET(val, 5, 0);
2447 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2448 u16 err = FLD_GET(val, 23, 8);
2449 dsi_show_rx_ack_with_err(err);
2450 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2451 DSSERR("\tDCS short response, 1 byte: %#x\n",
2452 FLD_GET(val, 23, 8));
2453 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2454 DSSERR("\tDCS short response, 2 byte: %#x\n",
2455 FLD_GET(val, 23, 8));
2456 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2457 DSSERR("\tDCS long response, len %d\n",
2458 FLD_GET(val, 23, 8));
2459 dsi_vc_flush_long_data(channel);
2461 DSSERR("\tunknown datatype 0x%02x\n", dt);
2467 static int dsi_vc_send_bta(int channel)
2469 if (dsi.debug_write || dsi.debug_read)
2470 DSSDBG("dsi_vc_send_bta %d\n", channel);
2472 WARN_ON(!dsi_bus_is_locked());
2474 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2475 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
2476 dsi_vc_flush_receive_data(channel);
2479 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
2484 int dsi_vc_send_bta_sync(int channel)
2486 DECLARE_COMPLETION_ONSTACK(completion);
2490 r = dsi_register_isr_vc(channel, dsi_completion_handler,
2491 &completion, DSI_VC_IRQ_BTA);
2495 r = dsi_register_isr(dsi_completion_handler, &completion,
2496 DSI_IRQ_ERROR_MASK);
2500 r = dsi_vc_send_bta(channel);
2504 if (wait_for_completion_timeout(&completion,
2505 msecs_to_jiffies(500)) == 0) {
2506 DSSERR("Failed to receive BTA\n");
2511 err = dsi_get_errors();
2513 DSSERR("Error while sending BTA: %x\n", err);
2518 dsi_unregister_isr(dsi_completion_handler, &completion,
2519 DSI_IRQ_ERROR_MASK);
2521 dsi_unregister_isr_vc(channel, dsi_completion_handler,
2522 &completion, DSI_VC_IRQ_BTA);
2526 EXPORT_SYMBOL(dsi_vc_send_bta_sync);
2528 static inline void dsi_vc_write_long_header(int channel, u8 data_type,
2534 WARN_ON(!dsi_bus_is_locked());
2536 data_id = data_type | dsi.vc[channel].vc_id << 6;
2538 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
2539 FLD_VAL(ecc, 31, 24);
2541 dsi_write_reg(DSI_VC_LONG_PACKET_HEADER(channel), val);
2544 static inline void dsi_vc_write_long_payload(int channel,
2545 u8 b1, u8 b2, u8 b3, u8 b4)
2549 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
2551 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
2552 b1, b2, b3, b4, val); */
2554 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
2557 static int dsi_vc_send_long(int channel, u8 data_type, u8 *data, u16 len,
2566 if (dsi.debug_write)
2567 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
2570 if (dsi.vc[channel].fifo_size * 32 * 4 < len + 4) {
2571 DSSERR("unable to send long packet: packet too long.\n");
2575 dsi_vc_config_l4(channel);
2577 dsi_vc_write_long_header(channel, data_type, len, ecc);
2580 for (i = 0; i < len >> 2; i++) {
2581 if (dsi.debug_write)
2582 DSSDBG("\tsending full packet %d\n", i);
2589 dsi_vc_write_long_payload(channel, b1, b2, b3, b4);
2594 b1 = 0; b2 = 0; b3 = 0;
2596 if (dsi.debug_write)
2597 DSSDBG("\tsending remainder bytes %d\n", i);
2614 dsi_vc_write_long_payload(channel, b1, b2, b3, 0);
2620 static int dsi_vc_send_short(int channel, u8 data_type, u16 data, u8 ecc)
2625 WARN_ON(!dsi_bus_is_locked());
2627 if (dsi.debug_write)
2628 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2630 data_type, data & 0xff, (data >> 8) & 0xff);
2632 dsi_vc_config_l4(channel);
2634 if (FLD_GET(dsi_read_reg(DSI_VC_CTRL(channel)), 16, 16)) {
2635 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2639 data_id = data_type | dsi.vc[channel].vc_id << 6;
2641 r = (data_id << 0) | (data << 8) | (ecc << 24);
2643 dsi_write_reg(DSI_VC_SHORT_PACKET_HEADER(channel), r);
2648 int dsi_vc_send_null(int channel)
2650 u8 nullpkg[] = {0, 0, 0, 0};
2651 return dsi_vc_send_long(channel, DSI_DT_NULL_PACKET, nullpkg, 4, 0);
2653 EXPORT_SYMBOL(dsi_vc_send_null);
2655 int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len)
2662 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_0,
2664 } else if (len == 2) {
2665 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_1,
2666 data[0] | (data[1] << 8), 0);
2668 /* 0x39 = DCS Long Write */
2669 r = dsi_vc_send_long(channel, DSI_DT_DCS_LONG_WRITE,
2675 EXPORT_SYMBOL(dsi_vc_dcs_write_nosync);
2677 int dsi_vc_dcs_write(int channel, u8 *data, int len)
2681 r = dsi_vc_dcs_write_nosync(channel, data, len);
2685 r = dsi_vc_send_bta_sync(channel);
2689 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2690 DSSERR("rx fifo not empty after write, dumping data:\n");
2691 dsi_vc_flush_receive_data(channel);
2698 DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
2699 channel, data[0], len);
2702 EXPORT_SYMBOL(dsi_vc_dcs_write);
2704 int dsi_vc_dcs_write_0(int channel, u8 dcs_cmd)
2706 return dsi_vc_dcs_write(channel, &dcs_cmd, 1);
2708 EXPORT_SYMBOL(dsi_vc_dcs_write_0);
2710 int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param)
2715 return dsi_vc_dcs_write(channel, buf, 2);
2717 EXPORT_SYMBOL(dsi_vc_dcs_write_1);
2719 int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
2726 DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %x)\n", channel, dcs_cmd);
2728 r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
2732 r = dsi_vc_send_bta_sync(channel);
2736 /* RX_FIFO_NOT_EMPTY */
2737 if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
2738 DSSERR("RX fifo empty when trying to read.\n");
2743 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2745 DSSDBG("\theader: %08x\n", val);
2746 dt = FLD_GET(val, 5, 0);
2747 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2748 u16 err = FLD_GET(val, 23, 8);
2749 dsi_show_rx_ack_with_err(err);
2753 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2754 u8 data = FLD_GET(val, 15, 8);
2756 DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
2766 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2767 u16 data = FLD_GET(val, 23, 8);
2769 DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
2776 buf[0] = data & 0xff;
2777 buf[1] = (data >> 8) & 0xff;
2780 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2782 int len = FLD_GET(val, 23, 8);
2784 DSSDBG("\tDCS long response, len %d\n", len);
2791 /* two byte checksum ends the packet, not included in len */
2792 for (w = 0; w < len + 2;) {
2794 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2796 DSSDBG("\t\t%02x %02x %02x %02x\n",
2800 (val >> 24) & 0xff);
2802 for (b = 0; b < 4; ++b) {
2804 buf[w] = (val >> (b * 8)) & 0xff;
2805 /* we discard the 2 byte checksum */
2812 DSSERR("\tunknown datatype 0x%02x\n", dt);
2819 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
2824 EXPORT_SYMBOL(dsi_vc_dcs_read);
2826 int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
2830 r = dsi_vc_dcs_read(channel, dcs_cmd, data, 1);
2840 EXPORT_SYMBOL(dsi_vc_dcs_read_1);
2842 int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u8 *data1, u8 *data2)
2847 r = dsi_vc_dcs_read(channel, dcs_cmd, buf, 2);
2860 EXPORT_SYMBOL(dsi_vc_dcs_read_2);
2862 int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
2864 return dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
2867 EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
2869 static int dsi_enter_ulps(void)
2871 DECLARE_COMPLETION_ONSTACK(completion);
2876 WARN_ON(!dsi_bus_is_locked());
2878 WARN_ON(dsi.ulps_enabled);
2880 if (dsi.ulps_enabled)
2883 if (REG_GET(DSI_CLK_CTRL, 13, 13)) {
2884 DSSERR("DDR_CLK_ALWAYS_ON enabled when entering ULPS\n");
2893 dsi_force_tx_stop_mode_io();
2895 dsi_vc_enable(0, false);
2896 dsi_vc_enable(1, false);
2897 dsi_vc_enable(2, false);
2898 dsi_vc_enable(3, false);
2900 if (REG_GET(DSI_COMPLEXIO_CFG2, 16, 16)) { /* HS_BUSY */
2901 DSSERR("HS busy when enabling ULPS\n");
2905 if (REG_GET(DSI_COMPLEXIO_CFG2, 17, 17)) { /* LP_BUSY */
2906 DSSERR("LP busy when enabling ULPS\n");
2910 r = dsi_register_isr_cio(dsi_completion_handler, &completion,
2911 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
2915 /* Assert TxRequestEsc for data lanes and TxUlpsClk for clk lane */
2916 /* LANEx_ULPS_SIG2 */
2917 REG_FLD_MOD(DSI_COMPLEXIO_CFG2, (1 << 0) | (1 << 1) | (1 << 2), 7, 5);
2919 if (wait_for_completion_timeout(&completion,
2920 msecs_to_jiffies(1000)) == 0) {
2921 DSSERR("ULPS enable timeout\n");
2926 dsi_unregister_isr_cio(dsi_completion_handler, &completion,
2927 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
2929 dsi_cio_power(DSI_COMPLEXIO_POWER_ULPS);
2931 dsi_if_enable(false);
2933 dsi.ulps_enabled = true;
2938 dsi_unregister_isr_cio(dsi_completion_handler, &completion,
2939 DSI_CIO_IRQ_ULPSACTIVENOT_ALL0);
2943 static void dsi_set_lp_rx_timeout(unsigned ticks, bool x4, bool x16)
2946 unsigned long total_ticks;
2949 BUG_ON(ticks > 0x1fff);
2951 /* ticks in DSI_FCK */
2952 fck = dsi_fclk_rate();
2954 r = dsi_read_reg(DSI_TIMING2);
2955 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
2956 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
2957 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
2958 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
2959 dsi_write_reg(DSI_TIMING2, r);
2961 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2963 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2965 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2966 (total_ticks * 1000) / (fck / 1000 / 1000));
2969 static void dsi_set_ta_timeout(unsigned ticks, bool x8, bool x16)
2972 unsigned long total_ticks;
2975 BUG_ON(ticks > 0x1fff);
2977 /* ticks in DSI_FCK */
2978 fck = dsi_fclk_rate();
2980 r = dsi_read_reg(DSI_TIMING1);
2981 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
2982 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
2983 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
2984 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
2985 dsi_write_reg(DSI_TIMING1, r);
2987 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
2989 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
2991 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
2992 (total_ticks * 1000) / (fck / 1000 / 1000));
2995 static void dsi_set_stop_state_counter(unsigned ticks, bool x4, bool x16)
2998 unsigned long total_ticks;
3001 BUG_ON(ticks > 0x1fff);
3003 /* ticks in DSI_FCK */
3004 fck = dsi_fclk_rate();
3006 r = dsi_read_reg(DSI_TIMING1);
3007 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
3008 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
3009 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
3010 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
3011 dsi_write_reg(DSI_TIMING1, r);
3013 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3015 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
3017 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3018 (total_ticks * 1000) / (fck / 1000 / 1000));
3021 static void dsi_set_hs_tx_timeout(unsigned ticks, bool x4, bool x16)
3024 unsigned long total_ticks;
3027 BUG_ON(ticks > 0x1fff);
3029 /* ticks in TxByteClkHS */
3030 fck = dsi_get_txbyteclkhs();
3032 r = dsi_read_reg(DSI_TIMING2);
3033 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
3034 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
3035 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
3036 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
3037 dsi_write_reg(DSI_TIMING2, r);
3039 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
3041 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
3043 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
3044 (total_ticks * 1000) / (fck / 1000 / 1000));
3046 static int dsi_proto_config(struct omap_dss_device *dssdev)
3051 dsi_config_tx_fifo(DSI_FIFO_SIZE_32,
3056 dsi_config_rx_fifo(DSI_FIFO_SIZE_32,
3061 /* XXX what values for the timeouts? */
3062 dsi_set_stop_state_counter(0x1000, false, false);
3063 dsi_set_ta_timeout(0x1fff, true, true);
3064 dsi_set_lp_rx_timeout(0x1fff, true, true);
3065 dsi_set_hs_tx_timeout(0x1fff, true, true);
3067 switch (dssdev->ctrl.pixel_size) {
3081 r = dsi_read_reg(DSI_CTRL);
3082 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
3083 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
3084 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
3085 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
3086 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
3087 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
3088 r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */
3089 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
3090 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
3091 if (!dss_has_feature(FEAT_DSI_DCS_CMD_CONFIG_VC)) {
3092 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
3093 /* DCS_CMD_CODE, 1=start, 0=continue */
3094 r = FLD_MOD(r, 0, 25, 25);
3097 dsi_write_reg(DSI_CTRL, r);
3099 dsi_vc_initial_config(0);
3100 dsi_vc_initial_config(1);
3101 dsi_vc_initial_config(2);
3102 dsi_vc_initial_config(3);
3107 static void dsi_proto_timings(struct omap_dss_device *dssdev)
3109 unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail;
3110 unsigned tclk_pre, tclk_post;
3111 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
3112 unsigned ths_trail, ths_exit;
3113 unsigned ddr_clk_pre, ddr_clk_post;
3114 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
3118 r = dsi_read_reg(DSI_DSIPHY_CFG0);
3119 ths_prepare = FLD_GET(r, 31, 24);
3120 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
3121 ths_zero = ths_prepare_ths_zero - ths_prepare;
3122 ths_trail = FLD_GET(r, 15, 8);
3123 ths_exit = FLD_GET(r, 7, 0);
3125 r = dsi_read_reg(DSI_DSIPHY_CFG1);
3126 tlpx = FLD_GET(r, 22, 16) * 2;
3127 tclk_trail = FLD_GET(r, 15, 8);
3128 tclk_zero = FLD_GET(r, 7, 0);
3130 r = dsi_read_reg(DSI_DSIPHY_CFG2);
3131 tclk_prepare = FLD_GET(r, 7, 0);
3135 /* min 60ns + 52*UI */
3136 tclk_post = ns2ddr(60) + 26;
3138 /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */
3139 if (dssdev->phy.dsi.data1_lane != 0 &&
3140 dssdev->phy.dsi.data2_lane != 0)
3145 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
3147 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
3149 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
3150 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
3152 r = dsi_read_reg(DSI_CLK_TIMING);
3153 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
3154 r = FLD_MOD(r, ddr_clk_post, 7, 0);
3155 dsi_write_reg(DSI_CLK_TIMING, r);
3157 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
3161 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
3162 DIV_ROUND_UP(ths_prepare, 4) +
3163 DIV_ROUND_UP(ths_zero + 3, 4);
3165 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
3167 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
3168 FLD_VAL(exit_hs_mode_lat, 15, 0);
3169 dsi_write_reg(DSI_VM_TIMING7, r);
3171 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
3172 enter_hs_mode_lat, exit_hs_mode_lat);
3176 #define DSI_DECL_VARS \
3177 int __dsi_cb = 0; u32 __dsi_cv = 0;
3179 #define DSI_FLUSH(ch) \
3180 if (__dsi_cb > 0) { \
3181 /*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \
3182 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \
3183 __dsi_cb = __dsi_cv = 0; \
3186 #define DSI_PUSH(ch, data) \
3188 __dsi_cv |= (data) << (__dsi_cb * 8); \
3189 /*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \
3190 if (++__dsi_cb > 3) \
3194 static int dsi_update_screen_l4(struct omap_dss_device *dssdev,
3195 int x, int y, int w, int h)
3197 /* Note: supports only 24bit colors in 32bit container */
3199 int fifo_stalls = 0;
3200 int max_dsi_packet_size;
3201 int max_data_per_packet;
3202 int max_pixels_per_packet;
3204 int bytespp = dssdev->ctrl.pixel_size / 8;
3210 struct omap_overlay *ovl;
3214 DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n",
3217 ovl = dssdev->manager->overlays[0];
3219 if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U)
3222 if (dssdev->ctrl.pixel_size != 24)
3225 scr_width = ovl->info.screen_width;
3226 data = ovl->info.vaddr;
3228 start_offset = scr_width * y + x;
3229 horiz_inc = scr_width - w;
3232 /* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes
3235 /* When using CPU, max long packet size is TX buffer size */
3236 max_dsi_packet_size = dsi.vc[0].fifo_size * 32 * 4;
3238 /* we seem to get better perf if we divide the tx fifo to half,
3239 and while the other half is being sent, we fill the other half
3240 max_dsi_packet_size /= 2; */
3242 max_data_per_packet = max_dsi_packet_size - 4 - 1;
3244 max_pixels_per_packet = max_data_per_packet / bytespp;
3246 DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet);
3248 pixels_left = w * h;
3250 DSSDBG("total pixels %d\n", pixels_left);
3252 data += start_offset;
3254 while (pixels_left > 0) {
3255 /* 0x2c = write_memory_start */
3256 /* 0x3c = write_memory_continue */
3257 u8 dcs_cmd = first ? 0x2c : 0x3c;
3263 /* using fifo not empty */
3264 /* TX_FIFO_NOT_EMPTY */
3265 while (FLD_GET(dsi_read_reg(DSI_VC_CTRL(0)), 5, 5)) {
3267 if (fifo_stalls > 0xfffff) {
3268 DSSERR("fifo stalls overflow, pixels left %d\n",
3276 /* using fifo emptiness */
3277 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 <
3278 max_dsi_packet_size) {
3280 if (fifo_stalls > 0xfffff) {
3281 DSSERR("fifo stalls overflow, pixels left %d\n",
3288 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 == 0) {
3290 if (fifo_stalls > 0xfffff) {
3291 DSSERR("fifo stalls overflow, pixels left %d\n",
3298 pixels = min(max_pixels_per_packet, pixels_left);
3300 pixels_left -= pixels;
3302 dsi_vc_write_long_header(0, DSI_DT_DCS_LONG_WRITE,
3303 1 + pixels * bytespp, 0);
3305 DSI_PUSH(0, dcs_cmd);
3307 while (pixels-- > 0) {
3308 u32 pix = __raw_readl(data++);
3310 DSI_PUSH(0, (pix >> 16) & 0xff);
3311 DSI_PUSH(0, (pix >> 8) & 0xff);
3312 DSI_PUSH(0, (pix >> 0) & 0xff);
3315 if (current_x == x+w) {
3327 static void dsi_update_screen_dispc(struct omap_dss_device *dssdev,
3328 u16 x, u16 y, u16 w, u16 h)
3334 unsigned packet_payload;
3335 unsigned packet_len;
3338 const unsigned channel = dsi.update_channel;
3339 /* line buffer is 1024 x 24bits */
3340 /* XXX: for some reason using full buffer size causes considerable TX
3341 * slowdown with update sizes that fill the whole buffer */
3342 const unsigned line_buf_size = 1023 * 3;
3344 DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
3347 dsi_vc_config_vp(channel);
3349 bytespp = dssdev->ctrl.pixel_size / 8;
3350 bytespl = w * bytespp;
3351 bytespf = bytespl * h;
3353 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
3354 * number of lines in a packet. See errata about VP_CLK_RATIO */
3356 if (bytespf < line_buf_size)
3357 packet_payload = bytespf;
3359 packet_payload = (line_buf_size) / bytespl * bytespl;
3361 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
3362 total_len = (bytespf / packet_payload) * packet_len;
3364 if (bytespf % packet_payload)
3365 total_len += (bytespf % packet_payload) + 1;
3367 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
3368 dsi_write_reg(DSI_VC_TE(channel), l);
3370 dsi_vc_write_long_header(channel, DSI_DT_DCS_LONG_WRITE, packet_len, 0);
3373 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
3375 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
3376 dsi_write_reg(DSI_VC_TE(channel), l);
3378 /* We put SIDLEMODE to no-idle for the duration of the transfer,
3379 * because DSS interrupts are not capable of waking up the CPU and the
3380 * framedone interrupt could be delayed for quite a long time. I think
3381 * the same goes for any DSS interrupts, but for some reason I have not
3382 * seen the problem anywhere else than here.
3384 dispc_disable_sidle();
3386 dsi_perf_mark_start();
3388 r = queue_delayed_work(dsi.workqueue, &dsi.framedone_timeout_work,
3389 msecs_to_jiffies(250));
3392 dss_start_update(dssdev);
3394 if (dsi.te_enabled) {
3395 /* disable LP_RX_TO, so that we can receive TE. Time to wait
3396 * for TE is longer than the timer allows */
3397 REG_FLD_MOD(DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
3399 dsi_vc_send_bta(channel);
3401 #ifdef DSI_CATCH_MISSING_TE
3402 mod_timer(&dsi.te_timer, jiffies + msecs_to_jiffies(250));
3407 #ifdef DSI_CATCH_MISSING_TE
3408 static void dsi_te_timeout(unsigned long arg)
3410 DSSERR("TE not received for 250ms!\n");
3414 static void dsi_handle_framedone(int error)
3416 /* SIDLEMODE back to smart-idle */
3417 dispc_enable_sidle();
3419 if (dsi.te_enabled) {
3420 /* enable LP_RX_TO again after the TE */
3421 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
3424 dsi.framedone_callback(error, dsi.framedone_data);
3427 dsi_perf_show("DISPC");
3430 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
3432 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
3433 * 250ms which would conflict with this timeout work. What should be
3434 * done is first cancel the transfer on the HW, and then cancel the
3435 * possibly scheduled framedone work. However, cancelling the transfer
3436 * on the HW is buggy, and would probably require resetting the whole
3439 DSSERR("Framedone not received for 250ms!\n");
3441 dsi_handle_framedone(-ETIMEDOUT);
3444 static void dsi_framedone_irq_callback(void *data, u32 mask)
3446 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
3447 * turns itself off. However, DSI still has the pixels in its buffers,
3448 * and is sending the data.
3451 __cancel_delayed_work(&dsi.framedone_timeout_work);
3453 dsi_handle_framedone(0);
3455 #ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
3456 dispc_fake_vsync_irq();
3460 int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
3461 u16 *x, u16 *y, u16 *w, u16 *h,
3462 bool enlarge_update_area)
3466 dssdev->driver->get_resolution(dssdev, &dw, &dh);
3468 if (*x > dw || *y > dh)
3480 if (*w == 0 || *h == 0)
3483 dsi_perf_mark_setup();
3485 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
3486 dss_setup_partial_planes(dssdev, x, y, w, h,
3487 enlarge_update_area);
3488 dispc_set_lcd_size(dssdev->manager->id, *w, *h);
3493 EXPORT_SYMBOL(omap_dsi_prepare_update);
3495 int omap_dsi_update(struct omap_dss_device *dssdev,
3497 u16 x, u16 y, u16 w, u16 h,
3498 void (*callback)(int, void *), void *data)
3500 dsi.update_channel = channel;
3502 /* OMAP DSS cannot send updates of odd widths.
3503 * omap_dsi_prepare_update() makes the widths even, but add a BUG_ON
3504 * here to make sure we catch erroneous updates. Otherwise we'll only
3505 * see rather obscure HW error happening, as DSS halts. */
3508 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
3509 dsi.framedone_callback = callback;
3510 dsi.framedone_data = data;
3512 dsi.update_region.x = x;
3513 dsi.update_region.y = y;
3514 dsi.update_region.w = w;
3515 dsi.update_region.h = h;
3516 dsi.update_region.device = dssdev;
3518 dsi_update_screen_dispc(dssdev, x, y, w, h);
3522 r = dsi_update_screen_l4(dssdev, x, y, w, h);
3526 dsi_perf_show("L4");
3532 EXPORT_SYMBOL(omap_dsi_update);
3536 static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
3540 r = omap_dispc_register_isr(dsi_framedone_irq_callback, NULL,
3541 DISPC_IRQ_FRAMEDONE);
3543 DSSERR("can't get FRAMEDONE irq\n");
3547 dispc_set_lcd_display_type(dssdev->manager->id,
3548 OMAP_DSS_LCD_DISPLAY_TFT);
3550 dispc_set_parallel_interface_mode(dssdev->manager->id,
3551 OMAP_DSS_PARALLELMODE_DSI);
3552 dispc_enable_fifohandcheck(dssdev->manager->id, 1);
3554 dispc_set_tft_data_lines(dssdev->manager->id, dssdev->ctrl.pixel_size);
3557 struct omap_video_timings timings = {
3566 dispc_set_lcd_timings(dssdev->manager->id, &timings);
3572 static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev)
3574 omap_dispc_unregister_isr(dsi_framedone_irq_callback, NULL,
3575 DISPC_IRQ_FRAMEDONE);
3578 static int dsi_configure_dsi_clocks(struct omap_dss_device *dssdev)
3580 struct dsi_clock_info cinfo;
3583 /* we always use DSS_CLK_SYSCK as input clock */
3584 cinfo.use_sys_clk = true;
3585 cinfo.regn = dssdev->clocks.dsi.regn;
3586 cinfo.regm = dssdev->clocks.dsi.regm;
3587 cinfo.regm_dispc = dssdev->clocks.dsi.regm_dispc;
3588 cinfo.regm_dsi = dssdev->clocks.dsi.regm_dsi;
3589 r = dsi_calc_clock_rates(dssdev, &cinfo);
3591 DSSERR("Failed to calc dsi clocks\n");
3595 r = dsi_pll_set_clock_div(&cinfo);
3597 DSSERR("Failed to set dsi clocks\n");
3604 static int dsi_configure_dispc_clocks(struct omap_dss_device *dssdev)
3606 struct dispc_clock_info dispc_cinfo;
3608 unsigned long long fck;
3610 fck = dsi_get_pll_hsdiv_dispc_rate();
3612 dispc_cinfo.lck_div = dssdev->clocks.dispc.channel.lck_div;
3613 dispc_cinfo.pck_div = dssdev->clocks.dispc.channel.pck_div;
3615 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
3617 DSSERR("Failed to calc dispc clocks\n");
3621 r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
3623 DSSERR("Failed to set dispc clocks\n");
3630 static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
3634 /* The SCPClk is required for both PLL and CIO registers on OMAP4 */
3635 dsi_enable_scp_clk();
3637 _dsi_print_reset_status();
3639 r = dsi_pll_init(dssdev, true, true);
3643 r = dsi_configure_dsi_clocks(dssdev);
3647 dss_select_dispc_clk_source(dssdev->clocks.dispc.dispc_fclk_src);
3648 dss_select_dsi_clk_source(dssdev->clocks.dsi.dsi_fclk_src);
3649 dss_select_lcd_clk_source(dssdev->manager->id,
3650 dssdev->clocks.dispc.channel.lcd_clk_src);
3654 r = dsi_configure_dispc_clocks(dssdev);
3658 r = dsi_cio_init(dssdev);
3662 _dsi_print_reset_status();
3664 dsi_proto_timings(dssdev);
3665 dsi_set_lp_clk_divisor(dssdev);
3668 _dsi_print_reset_status();
3670 r = dsi_proto_config(dssdev);
3674 /* enable interface */
3675 dsi_vc_enable(0, 1);
3676 dsi_vc_enable(1, 1);
3677 dsi_vc_enable(2, 1);
3678 dsi_vc_enable(3, 1);
3680 dsi_force_tx_stop_mode_io();
3686 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
3687 dss_select_dsi_clk_source(OMAP_DSS_CLK_SRC_FCK);
3689 dsi_pll_uninit(true);
3691 dsi_disable_scp_clk();
3695 static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev,
3696 bool disconnect_lanes)
3698 if (!dsi.ulps_enabled)
3701 /* disable interface */
3703 dsi_vc_enable(0, 0);
3704 dsi_vc_enable(1, 0);
3705 dsi_vc_enable(2, 0);
3706 dsi_vc_enable(3, 0);
3708 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
3709 dss_select_dsi_clk_source(OMAP_DSS_CLK_SRC_FCK);
3711 dsi_pll_uninit(disconnect_lanes);
3712 dsi_disable_scp_clk();
3715 static int dsi_core_init(void)
3718 REG_FLD_MOD(DSI_SYSCONFIG, 1, 0, 0);
3721 REG_FLD_MOD(DSI_SYSCONFIG, 1, 2, 2);
3723 /* SIDLEMODE smart-idle */
3724 REG_FLD_MOD(DSI_SYSCONFIG, 2, 4, 3);
3726 _dsi_initialize_irq();
3731 int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
3735 DSSDBG("dsi_display_enable\n");
3737 WARN_ON(!dsi_bus_is_locked());
3739 mutex_lock(&dsi.lock);
3741 r = omap_dss_start_device(dssdev);
3743 DSSERR("failed to start device\n");
3748 dsi_enable_pll_clock(1);
3756 r = dsi_display_init_dispc(dssdev);
3760 r = dsi_display_init_dsi(dssdev);
3764 mutex_unlock(&dsi.lock);
3769 dsi_display_uninit_dispc(dssdev);
3772 dsi_enable_pll_clock(0);
3773 omap_dss_stop_device(dssdev);
3775 mutex_unlock(&dsi.lock);
3776 DSSDBG("dsi_display_enable FAILED\n");
3779 EXPORT_SYMBOL(omapdss_dsi_display_enable);
3781 void omapdss_dsi_display_disable(struct omap_dss_device *dssdev,
3782 bool disconnect_lanes)
3784 DSSDBG("dsi_display_disable\n");
3786 WARN_ON(!dsi_bus_is_locked());
3788 mutex_lock(&dsi.lock);
3790 dsi_display_uninit_dispc(dssdev);
3792 dsi_display_uninit_dsi(dssdev, disconnect_lanes);
3795 dsi_enable_pll_clock(0);
3797 omap_dss_stop_device(dssdev);
3799 mutex_unlock(&dsi.lock);
3801 EXPORT_SYMBOL(omapdss_dsi_display_disable);
3803 int omapdss_dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
3805 dsi.te_enabled = enable;
3808 EXPORT_SYMBOL(omapdss_dsi_enable_te);
3810 void dsi_get_overlay_fifo_thresholds(enum omap_plane plane,
3811 u32 fifo_size, enum omap_burst_size *burst_size,
3812 u32 *fifo_low, u32 *fifo_high)
3814 unsigned burst_size_bytes;
3816 *burst_size = OMAP_DSS_BURST_16x32;
3817 burst_size_bytes = 16 * 32 / 8;
3819 *fifo_high = fifo_size - burst_size_bytes;
3820 *fifo_low = fifo_size - burst_size_bytes * 2;
3823 int dsi_init_display(struct omap_dss_device *dssdev)
3825 DSSDBG("DSI init\n");
3827 /* XXX these should be figured out dynamically */
3828 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
3829 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
3831 if (dsi.vdds_dsi_reg == NULL) {
3832 struct regulator *vdds_dsi;
3834 vdds_dsi = regulator_get(&dsi.pdev->dev, "vdds_dsi");
3836 if (IS_ERR(vdds_dsi)) {
3837 DSSERR("can't get VDDS_DSI regulator\n");
3838 return PTR_ERR(vdds_dsi);
3841 dsi.vdds_dsi_reg = vdds_dsi;
3847 int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
3851 for (i = 0; i < ARRAY_SIZE(dsi.vc); i++) {
3852 if (!dsi.vc[i].dssdev) {
3853 dsi.vc[i].dssdev = dssdev;
3859 DSSERR("cannot get VC for display %s", dssdev->name);
3862 EXPORT_SYMBOL(omap_dsi_request_vc);
3864 int omap_dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id)
3866 if (vc_id < 0 || vc_id > 3) {
3867 DSSERR("VC ID out of range\n");
3871 if (channel < 0 || channel > 3) {
3872 DSSERR("Virtual Channel out of range\n");
3876 if (dsi.vc[channel].dssdev != dssdev) {
3877 DSSERR("Virtual Channel not allocated to display %s\n",
3882 dsi.vc[channel].vc_id = vc_id;
3886 EXPORT_SYMBOL(omap_dsi_set_vc_id);
3888 void omap_dsi_release_vc(struct omap_dss_device *dssdev, int channel)
3890 if ((channel >= 0 && channel <= 3) &&
3891 dsi.vc[channel].dssdev == dssdev) {
3892 dsi.vc[channel].dssdev = NULL;
3893 dsi.vc[channel].vc_id = 0;
3896 EXPORT_SYMBOL(omap_dsi_release_vc);
3898 void dsi_wait_pll_hsdiv_dispc_active(void)
3900 if (wait_for_bit_change(DSI_PLL_STATUS, 7, 1) != 1)
3901 DSSERR("%s (%s) not active\n",
3902 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
3903 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC));
3906 void dsi_wait_pll_hsdiv_dsi_active(void)
3908 if (wait_for_bit_change(DSI_PLL_STATUS, 8, 1) != 1)
3909 DSSERR("%s (%s) not active\n",
3910 dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
3911 dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI));
3914 static void dsi_calc_clock_param_ranges(void)
3916 dsi.regn_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGN);
3917 dsi.regm_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM);
3918 dsi.regm_dispc_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM_DISPC);
3919 dsi.regm_dsi_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_REGM_DSI);
3920 dsi.fint_min = dss_feat_get_param_min(FEAT_PARAM_DSIPLL_FINT);
3921 dsi.fint_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_FINT);
3922 dsi.lpdiv_max = dss_feat_get_param_max(FEAT_PARAM_DSIPLL_LPDIV);
3925 static int dsi_init(struct platform_device *pdev)
3929 struct resource *dsi_mem;
3931 spin_lock_init(&dsi.irq_lock);
3932 spin_lock_init(&dsi.errors_lock);
3935 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
3936 spin_lock_init(&dsi.irq_stats_lock);
3937 dsi.irq_stats.last_reset = jiffies;
3940 mutex_init(&dsi.lock);
3941 sema_init(&dsi.bus_lock, 1);
3943 dsi.workqueue = create_singlethread_workqueue("dsi");
3944 if (dsi.workqueue == NULL)
3947 INIT_DELAYED_WORK_DEFERRABLE(&dsi.framedone_timeout_work,
3948 dsi_framedone_timeout_work_callback);
3950 #ifdef DSI_CATCH_MISSING_TE
3951 init_timer(&dsi.te_timer);
3952 dsi.te_timer.function = dsi_te_timeout;
3953 dsi.te_timer.data = 0;
3955 dsi_mem = platform_get_resource(dsi.pdev, IORESOURCE_MEM, 0);
3957 DSSERR("can't get IORESOURCE_MEM DSI\n");
3961 dsi.base = ioremap(dsi_mem->start, resource_size(dsi_mem));
3963 DSSERR("can't ioremap DSI\n");
3967 dsi.irq = platform_get_irq(dsi.pdev, 0);
3969 DSSERR("platform_get_irq failed\n");
3974 r = request_irq(dsi.irq, omap_dsi_irq_handler, IRQF_SHARED,
3975 "OMAP DSI1", dsi.pdev);
3977 DSSERR("request_irq failed\n");
3981 /* DSI VCs initialization */
3982 for (i = 0; i < ARRAY_SIZE(dsi.vc); i++) {
3983 dsi.vc[i].mode = DSI_VC_MODE_L4;
3984 dsi.vc[i].dssdev = NULL;
3985 dsi.vc[i].vc_id = 0;
3988 dsi_calc_clock_param_ranges();
3992 rev = dsi_read_reg(DSI_REVISION);
3993 dev_dbg(&pdev->dev, "OMAP DSI rev %d.%d\n",
3994 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
4002 destroy_workqueue(dsi.workqueue);
4006 static void dsi_exit(void)
4008 if (dsi.vdds_dsi_reg != NULL) {
4009 regulator_put(dsi.vdds_dsi_reg);
4010 dsi.vdds_dsi_reg = NULL;
4013 free_irq(dsi.irq, dsi.pdev);
4016 destroy_workqueue(dsi.workqueue);
4018 DSSDBG("omap_dsi_exit\n");
4021 /* DSI1 HW IP initialisation */
4022 static int omap_dsi1hw_probe(struct platform_device *pdev)
4028 DSSERR("Failed to initialize DSI\n");
4035 static int omap_dsi1hw_remove(struct platform_device *pdev)
4038 WARN_ON(dsi.scp_clk_refcount > 0);
4042 static struct platform_driver omap_dsi1hw_driver = {
4043 .probe = omap_dsi1hw_probe,
4044 .remove = omap_dsi1hw_remove,
4046 .name = "omapdss_dsi1",
4047 .owner = THIS_MODULE,
4051 int dsi_init_platform_driver(void)
4053 return platform_driver_register(&omap_dsi1hw_driver);
4056 void dsi_uninit_platform_driver(void)
4058 return platform_driver_unregister(&omap_dsi1hw_driver);