2 * linux/drivers/video/omap2/dss/dsi.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #define DSS_SUBSYS_NAME "DSI"
22 #include <linux/kernel.h>
24 #include <linux/clk.h>
25 #include <linux/device.h>
26 #include <linux/err.h>
27 #include <linux/interrupt.h>
28 #include <linux/delay.h>
29 #include <linux/mutex.h>
30 #include <linux/semaphore.h>
31 #include <linux/seq_file.h>
32 #include <linux/platform_device.h>
33 #include <linux/regulator/consumer.h>
34 #include <linux/wait.h>
35 #include <linux/workqueue.h>
37 #include <plat/display.h>
38 #include <plat/clock.h>
41 #include "dss_features.h"
43 /*#define VERBOSE_IRQ*/
44 #define DSI_CATCH_MISSING_TE
46 struct dsi_reg { u16 idx; };
48 #define DSI_REG(idx) ((const struct dsi_reg) { idx })
50 #define DSI_SZ_REGS SZ_1K
51 /* DSI Protocol Engine */
53 #define DSI_REVISION DSI_REG(0x0000)
54 #define DSI_SYSCONFIG DSI_REG(0x0010)
55 #define DSI_SYSSTATUS DSI_REG(0x0014)
56 #define DSI_IRQSTATUS DSI_REG(0x0018)
57 #define DSI_IRQENABLE DSI_REG(0x001C)
58 #define DSI_CTRL DSI_REG(0x0040)
59 #define DSI_COMPLEXIO_CFG1 DSI_REG(0x0048)
60 #define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(0x004C)
61 #define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(0x0050)
62 #define DSI_CLK_CTRL DSI_REG(0x0054)
63 #define DSI_TIMING1 DSI_REG(0x0058)
64 #define DSI_TIMING2 DSI_REG(0x005C)
65 #define DSI_VM_TIMING1 DSI_REG(0x0060)
66 #define DSI_VM_TIMING2 DSI_REG(0x0064)
67 #define DSI_VM_TIMING3 DSI_REG(0x0068)
68 #define DSI_CLK_TIMING DSI_REG(0x006C)
69 #define DSI_TX_FIFO_VC_SIZE DSI_REG(0x0070)
70 #define DSI_RX_FIFO_VC_SIZE DSI_REG(0x0074)
71 #define DSI_COMPLEXIO_CFG2 DSI_REG(0x0078)
72 #define DSI_RX_FIFO_VC_FULLNESS DSI_REG(0x007C)
73 #define DSI_VM_TIMING4 DSI_REG(0x0080)
74 #define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(0x0084)
75 #define DSI_VM_TIMING5 DSI_REG(0x0088)
76 #define DSI_VM_TIMING6 DSI_REG(0x008C)
77 #define DSI_VM_TIMING7 DSI_REG(0x0090)
78 #define DSI_STOPCLK_TIMING DSI_REG(0x0094)
79 #define DSI_VC_CTRL(n) DSI_REG(0x0100 + (n * 0x20))
80 #define DSI_VC_TE(n) DSI_REG(0x0104 + (n * 0x20))
81 #define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(0x0108 + (n * 0x20))
82 #define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(0x010C + (n * 0x20))
83 #define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(0x0110 + (n * 0x20))
84 #define DSI_VC_IRQSTATUS(n) DSI_REG(0x0118 + (n * 0x20))
85 #define DSI_VC_IRQENABLE(n) DSI_REG(0x011C + (n * 0x20))
89 #define DSI_DSIPHY_CFG0 DSI_REG(0x200 + 0x0000)
90 #define DSI_DSIPHY_CFG1 DSI_REG(0x200 + 0x0004)
91 #define DSI_DSIPHY_CFG2 DSI_REG(0x200 + 0x0008)
92 #define DSI_DSIPHY_CFG5 DSI_REG(0x200 + 0x0014)
94 /* DSI_PLL_CTRL_SCP */
96 #define DSI_PLL_CONTROL DSI_REG(0x300 + 0x0000)
97 #define DSI_PLL_STATUS DSI_REG(0x300 + 0x0004)
98 #define DSI_PLL_GO DSI_REG(0x300 + 0x0008)
99 #define DSI_PLL_CONFIGURATION1 DSI_REG(0x300 + 0x000C)
100 #define DSI_PLL_CONFIGURATION2 DSI_REG(0x300 + 0x0010)
102 #define REG_GET(idx, start, end) \
103 FLD_GET(dsi_read_reg(idx), start, end)
105 #define REG_FLD_MOD(idx, val, start, end) \
106 dsi_write_reg(idx, FLD_MOD(dsi_read_reg(idx), val, start, end))
108 /* Global interrupts */
109 #define DSI_IRQ_VC0 (1 << 0)
110 #define DSI_IRQ_VC1 (1 << 1)
111 #define DSI_IRQ_VC2 (1 << 2)
112 #define DSI_IRQ_VC3 (1 << 3)
113 #define DSI_IRQ_WAKEUP (1 << 4)
114 #define DSI_IRQ_RESYNC (1 << 5)
115 #define DSI_IRQ_PLL_LOCK (1 << 7)
116 #define DSI_IRQ_PLL_UNLOCK (1 << 8)
117 #define DSI_IRQ_PLL_RECALL (1 << 9)
118 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
119 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
120 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
121 #define DSI_IRQ_TE_TRIGGER (1 << 16)
122 #define DSI_IRQ_ACK_TRIGGER (1 << 17)
123 #define DSI_IRQ_SYNC_LOST (1 << 18)
124 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
125 #define DSI_IRQ_TA_TIMEOUT (1 << 20)
126 #define DSI_IRQ_ERROR_MASK \
127 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
129 #define DSI_IRQ_CHANNEL_MASK 0xf
131 /* Virtual channel interrupts */
132 #define DSI_VC_IRQ_CS (1 << 0)
133 #define DSI_VC_IRQ_ECC_CORR (1 << 1)
134 #define DSI_VC_IRQ_PACKET_SENT (1 << 2)
135 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
136 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
137 #define DSI_VC_IRQ_BTA (1 << 5)
138 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
139 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
140 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
141 #define DSI_VC_IRQ_ERROR_MASK \
142 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
143 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
144 DSI_VC_IRQ_FIFO_TX_UDF)
146 /* ComplexIO interrupts */
147 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
148 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
149 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
150 #define DSI_CIO_IRQ_ERRESC1 (1 << 5)
151 #define DSI_CIO_IRQ_ERRESC2 (1 << 6)
152 #define DSI_CIO_IRQ_ERRESC3 (1 << 7)
153 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
154 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
155 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
156 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
157 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
158 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
159 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
160 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
161 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
162 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
163 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
164 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
165 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
166 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
167 #define DSI_CIO_IRQ_ERROR_MASK \
168 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
169 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
170 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRCONTROL1 | \
171 DSI_CIO_IRQ_ERRCONTROL2 | DSI_CIO_IRQ_ERRCONTROL3 | \
172 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
173 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
174 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3)
176 #define DSI_DT_DCS_SHORT_WRITE_0 0x05
177 #define DSI_DT_DCS_SHORT_WRITE_1 0x15
178 #define DSI_DT_DCS_READ 0x06
179 #define DSI_DT_SET_MAX_RET_PKG_SIZE 0x37
180 #define DSI_DT_NULL_PACKET 0x09
181 #define DSI_DT_DCS_LONG_WRITE 0x39
183 #define DSI_DT_RX_ACK_WITH_ERR 0x02
184 #define DSI_DT_RX_DCS_LONG_READ 0x1c
185 #define DSI_DT_RX_SHORT_READ_1 0x21
186 #define DSI_DT_RX_SHORT_READ_2 0x22
188 #define FINT_MAX 2100000
189 #define FINT_MIN 750000
190 #define REGN_MAX (1 << 7)
191 #define REGM_MAX ((1 << 11) - 1)
192 #define REGM_DISPC_MAX (1 << 4)
193 #define REGM_DSI_MAX (1 << 4)
194 #define LP_DIV_MAX ((1 << 13) - 1)
198 DSI_FIFO_SIZE_32 = 1,
199 DSI_FIFO_SIZE_64 = 2,
200 DSI_FIFO_SIZE_96 = 3,
201 DSI_FIFO_SIZE_128 = 4,
209 struct dsi_update_region {
211 struct omap_dss_device *device;
214 struct dsi_irq_stats {
215 unsigned long last_reset;
217 unsigned dsi_irqs[32];
218 unsigned vc_irqs[4][32];
219 unsigned cio_irqs[32];
224 struct platform_device *pdev;
228 struct dsi_clock_info current_cinfo;
230 struct regulator *vdds_dsi_reg;
233 enum dsi_vc_mode mode;
234 struct omap_dss_device *dssdev;
235 enum fifo_size fifo_size;
240 struct semaphore bus_lock;
244 struct completion bta_completion;
245 void (*bta_callback)(void);
248 struct dsi_update_region update_region;
252 struct workqueue_struct *workqueue;
254 void (*framedone_callback)(int, void *);
255 void *framedone_data;
257 struct delayed_work framedone_timeout_work;
259 #ifdef DSI_CATCH_MISSING_TE
260 struct timer_list te_timer;
263 unsigned long cache_req_pck;
264 unsigned long cache_clk_freq;
265 struct dsi_clock_info cache_cinfo;
268 spinlock_t errors_lock;
270 ktime_t perf_setup_time;
271 ktime_t perf_start_time;
276 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
277 spinlock_t irq_stats_lock;
278 struct dsi_irq_stats irq_stats;
283 static unsigned int dsi_perf;
284 module_param_named(dsi_perf, dsi_perf, bool, 0644);
287 static inline void dsi_write_reg(const struct dsi_reg idx, u32 val)
289 __raw_writel(val, dsi.base + idx.idx);
292 static inline u32 dsi_read_reg(const struct dsi_reg idx)
294 return __raw_readl(dsi.base + idx.idx);
298 void dsi_save_context(void)
302 void dsi_restore_context(void)
306 void dsi_bus_lock(void)
310 EXPORT_SYMBOL(dsi_bus_lock);
312 void dsi_bus_unlock(void)
316 EXPORT_SYMBOL(dsi_bus_unlock);
318 static bool dsi_bus_is_locked(void)
320 return dsi.bus_lock.count == 0;
323 static inline int wait_for_bit_change(const struct dsi_reg idx, int bitnum,
328 while (REG_GET(idx, bitnum, bitnum) != value) {
337 static void dsi_perf_mark_setup(void)
339 dsi.perf_setup_time = ktime_get();
342 static void dsi_perf_mark_start(void)
344 dsi.perf_start_time = ktime_get();
347 static void dsi_perf_show(const char *name)
349 ktime_t t, setup_time, trans_time;
351 u32 setup_us, trans_us, total_us;
358 setup_time = ktime_sub(dsi.perf_start_time, dsi.perf_setup_time);
359 setup_us = (u32)ktime_to_us(setup_time);
363 trans_time = ktime_sub(t, dsi.perf_start_time);
364 trans_us = (u32)ktime_to_us(trans_time);
368 total_us = setup_us + trans_us;
370 total_bytes = dsi.update_region.w *
371 dsi.update_region.h *
372 dsi.update_region.device->ctrl.pixel_size / 8;
374 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
375 "%u bytes, %u kbytes/sec\n",
380 1000*1000 / total_us,
382 total_bytes * 1000 / total_us);
385 #define dsi_perf_mark_setup()
386 #define dsi_perf_mark_start()
387 #define dsi_perf_show(x)
390 static void print_irq_status(u32 status)
393 if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0)
396 printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status);
399 if (status & DSI_IRQ_##x) \
425 static void print_irq_status_vc(int channel, u32 status)
428 if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
431 printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status);
434 if (status & DSI_VC_IRQ_##x) \
451 static void print_irq_status_cio(u32 status)
453 printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status);
456 if (status & DSI_CIO_IRQ_##x) \
470 PIS(ERRCONTENTIONLP0_1);
471 PIS(ERRCONTENTIONLP1_1);
472 PIS(ERRCONTENTIONLP0_2);
473 PIS(ERRCONTENTIONLP1_2);
474 PIS(ERRCONTENTIONLP0_3);
475 PIS(ERRCONTENTIONLP1_3);
476 PIS(ULPSACTIVENOT_ALL0);
477 PIS(ULPSACTIVENOT_ALL1);
483 static int debug_irq;
485 /* called from dss */
486 static irqreturn_t omap_dsi_irq_handler(int irq, void *arg)
488 u32 irqstatus, vcstatus, ciostatus;
491 irqstatus = dsi_read_reg(DSI_IRQSTATUS);
493 /* IRQ is not for us */
497 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
498 spin_lock(&dsi.irq_stats_lock);
499 dsi.irq_stats.irq_count++;
500 dss_collect_irq_stats(irqstatus, dsi.irq_stats.dsi_irqs);
503 if (irqstatus & DSI_IRQ_ERROR_MASK) {
504 DSSERR("DSI error, irqstatus %x\n", irqstatus);
505 print_irq_status(irqstatus);
506 spin_lock(&dsi.errors_lock);
507 dsi.errors |= irqstatus & DSI_IRQ_ERROR_MASK;
508 spin_unlock(&dsi.errors_lock);
509 } else if (debug_irq) {
510 print_irq_status(irqstatus);
513 #ifdef DSI_CATCH_MISSING_TE
514 if (irqstatus & DSI_IRQ_TE_TRIGGER)
515 del_timer(&dsi.te_timer);
518 for (i = 0; i < 4; ++i) {
519 if ((irqstatus & (1<<i)) == 0)
522 vcstatus = dsi_read_reg(DSI_VC_IRQSTATUS(i));
524 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
525 dss_collect_irq_stats(vcstatus, dsi.irq_stats.vc_irqs[i]);
528 if (vcstatus & DSI_VC_IRQ_BTA) {
529 complete(&dsi.bta_completion);
531 if (dsi.bta_callback)
535 if (vcstatus & DSI_VC_IRQ_ERROR_MASK) {
536 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
538 print_irq_status_vc(i, vcstatus);
539 } else if (debug_irq) {
540 print_irq_status_vc(i, vcstatus);
543 dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus);
544 /* flush posted write */
545 dsi_read_reg(DSI_VC_IRQSTATUS(i));
548 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
549 ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
551 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
552 dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);
555 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
556 /* flush posted write */
557 dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
559 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
560 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
561 print_irq_status_cio(ciostatus);
562 } else if (debug_irq) {
563 print_irq_status_cio(ciostatus);
567 dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
568 /* flush posted write */
569 dsi_read_reg(DSI_IRQSTATUS);
571 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
572 spin_unlock(&dsi.irq_stats_lock);
577 static void _dsi_initialize_irq(void)
582 /* disable all interrupts */
583 dsi_write_reg(DSI_IRQENABLE, 0);
584 for (i = 0; i < 4; ++i)
585 dsi_write_reg(DSI_VC_IRQENABLE(i), 0);
586 dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, 0);
588 /* clear interrupt status */
589 l = dsi_read_reg(DSI_IRQSTATUS);
590 dsi_write_reg(DSI_IRQSTATUS, l & ~DSI_IRQ_CHANNEL_MASK);
592 for (i = 0; i < 4; ++i) {
593 l = dsi_read_reg(DSI_VC_IRQSTATUS(i));
594 dsi_write_reg(DSI_VC_IRQSTATUS(i), l);
597 l = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
598 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, l);
600 /* enable error irqs */
601 l = DSI_IRQ_ERROR_MASK;
602 #ifdef DSI_CATCH_MISSING_TE
603 l |= DSI_IRQ_TE_TRIGGER;
605 dsi_write_reg(DSI_IRQENABLE, l);
607 l = DSI_VC_IRQ_ERROR_MASK;
608 for (i = 0; i < 4; ++i)
609 dsi_write_reg(DSI_VC_IRQENABLE(i), l);
611 l = DSI_CIO_IRQ_ERROR_MASK;
612 dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, l);
615 static u32 dsi_get_errors(void)
619 spin_lock_irqsave(&dsi.errors_lock, flags);
622 spin_unlock_irqrestore(&dsi.errors_lock, flags);
626 static void dsi_vc_enable_bta_irq(int channel)
630 dsi_write_reg(DSI_VC_IRQSTATUS(channel), DSI_VC_IRQ_BTA);
632 l = dsi_read_reg(DSI_VC_IRQENABLE(channel));
634 dsi_write_reg(DSI_VC_IRQENABLE(channel), l);
637 static void dsi_vc_disable_bta_irq(int channel)
641 l = dsi_read_reg(DSI_VC_IRQENABLE(channel));
642 l &= ~DSI_VC_IRQ_BTA;
643 dsi_write_reg(DSI_VC_IRQENABLE(channel), l);
646 /* DSI func clock. this could also be dsi_pll_hsdiv_dsi_clk */
647 static inline void enable_clocks(bool enable)
650 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
652 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
655 /* source clock for DSI PLL. this could also be PCLKFREE */
656 static inline void dsi_enable_pll_clock(bool enable)
659 dss_clk_enable(DSS_CLK_SYSCK);
661 dss_clk_disable(DSS_CLK_SYSCK);
663 if (enable && dsi.pll_locked) {
664 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1)
665 DSSERR("cannot lock PLL when enabling clocks\n");
670 static void _dsi_print_reset_status(void)
677 /* A dummy read using the SCP interface to any DSIPHY register is
678 * required after DSIPHY reset to complete the reset of the DSI complex
680 l = dsi_read_reg(DSI_DSIPHY_CFG5);
682 printk(KERN_DEBUG "DSI resets: ");
684 l = dsi_read_reg(DSI_PLL_STATUS);
685 printk("PLL (%d) ", FLD_GET(l, 0, 0));
687 l = dsi_read_reg(DSI_COMPLEXIO_CFG1);
688 printk("CIO (%d) ", FLD_GET(l, 29, 29));
690 l = dsi_read_reg(DSI_DSIPHY_CFG5);
691 printk("PHY (%x, %d, %d, %d)\n",
698 #define _dsi_print_reset_status()
701 static inline int dsi_if_enable(bool enable)
703 DSSDBG("dsi_if_enable(%d)\n", enable);
705 enable = enable ? 1 : 0;
706 REG_FLD_MOD(DSI_CTRL, enable, 0, 0); /* IF_EN */
708 if (wait_for_bit_change(DSI_CTRL, 0, enable) != enable) {
709 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
716 unsigned long dsi_get_pll_hsdiv_dispc_rate(void)
718 return dsi.current_cinfo.dsi_pll_hsdiv_dispc_clk;
721 static unsigned long dsi_get_pll_hsdiv_dsi_rate(void)
723 return dsi.current_cinfo.dsi_pll_hsdiv_dsi_clk;
726 static unsigned long dsi_get_txbyteclkhs(void)
728 return dsi.current_cinfo.clkin4ddr / 16;
731 static unsigned long dsi_fclk_rate(void)
735 if (dss_get_dsi_clk_source() == DSS_CLK_SRC_FCK) {
736 /* DSI FCLK source is DSS_CLK_FCK */
737 r = dss_clk_get_rate(DSS_CLK_FCK);
739 /* DSI FCLK source is dsi_pll_hsdiv_dsi_clk */
740 r = dsi_get_pll_hsdiv_dsi_rate();
746 static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev)
748 unsigned long dsi_fclk;
750 unsigned long lp_clk;
752 lp_clk_div = dssdev->phy.dsi.div.lp_clk_div;
754 if (lp_clk_div == 0 || lp_clk_div > LP_DIV_MAX)
757 dsi_fclk = dsi_fclk_rate();
759 lp_clk = dsi_fclk / 2 / lp_clk_div;
761 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
762 dsi.current_cinfo.lp_clk = lp_clk;
763 dsi.current_cinfo.lp_clk_div = lp_clk_div;
765 REG_FLD_MOD(DSI_CLK_CTRL, lp_clk_div, 12, 0); /* LP_CLK_DIVISOR */
767 REG_FLD_MOD(DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0,
768 21, 21); /* LP_RX_SYNCHRO_ENABLE */
774 enum dsi_pll_power_state {
775 DSI_PLL_POWER_OFF = 0x0,
776 DSI_PLL_POWER_ON_HSCLK = 0x1,
777 DSI_PLL_POWER_ON_ALL = 0x2,
778 DSI_PLL_POWER_ON_DIV = 0x3,
781 static int dsi_pll_power(enum dsi_pll_power_state state)
785 REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30); /* PLL_PWR_CMD */
788 while (FLD_GET(dsi_read_reg(DSI_CLK_CTRL), 29, 28) != state) {
790 DSSERR("Failed to set DSI PLL power mode to %d\n",
800 /* calculate clock rates using dividers in cinfo */
801 static int dsi_calc_clock_rates(struct omap_dss_device *dssdev,
802 struct dsi_clock_info *cinfo)
804 if (cinfo->regn == 0 || cinfo->regn > REGN_MAX)
807 if (cinfo->regm == 0 || cinfo->regm > REGM_MAX)
810 if (cinfo->regm_dispc > REGM_DISPC_MAX)
813 if (cinfo->regm_dsi > REGM_DSI_MAX)
816 if (cinfo->use_sys_clk) {
817 cinfo->clkin = dss_clk_get_rate(DSS_CLK_SYSCK);
818 /* XXX it is unclear if highfreq should be used
819 * with DSS_SYS_CLK source also */
822 cinfo->clkin = dispc_pclk_rate(dssdev->manager->id);
824 if (cinfo->clkin < 32000000)
830 cinfo->fint = cinfo->clkin / (cinfo->regn * (cinfo->highfreq ? 2 : 1));
832 if (cinfo->fint > FINT_MAX || cinfo->fint < FINT_MIN)
835 cinfo->clkin4ddr = 2 * cinfo->regm * cinfo->fint;
837 if (cinfo->clkin4ddr > 1800 * 1000 * 1000)
840 if (cinfo->regm_dispc > 0)
841 cinfo->dsi_pll_hsdiv_dispc_clk =
842 cinfo->clkin4ddr / cinfo->regm_dispc;
844 cinfo->dsi_pll_hsdiv_dispc_clk = 0;
846 if (cinfo->regm_dsi > 0)
847 cinfo->dsi_pll_hsdiv_dsi_clk =
848 cinfo->clkin4ddr / cinfo->regm_dsi;
850 cinfo->dsi_pll_hsdiv_dsi_clk = 0;
855 int dsi_pll_calc_clock_div_pck(bool is_tft, unsigned long req_pck,
856 struct dsi_clock_info *dsi_cinfo,
857 struct dispc_clock_info *dispc_cinfo)
859 struct dsi_clock_info cur, best;
860 struct dispc_clock_info best_dispc;
863 unsigned long dss_sys_clk, max_dss_fck;
865 dss_sys_clk = dss_clk_get_rate(DSS_CLK_SYSCK);
867 max_dss_fck = dss_feat_get_max_dss_fck();
869 if (req_pck == dsi.cache_req_pck &&
870 dsi.cache_cinfo.clkin == dss_sys_clk) {
871 DSSDBG("DSI clock info found from cache\n");
872 *dsi_cinfo = dsi.cache_cinfo;
873 dispc_find_clk_divs(is_tft, req_pck,
874 dsi_cinfo->dsi_pll_hsdiv_dispc_clk, dispc_cinfo);
878 min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK;
880 if (min_fck_per_pck &&
881 req_pck * min_fck_per_pck > max_dss_fck) {
882 DSSERR("Requested pixel clock not possible with the current "
883 "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning "
884 "the constraint off.\n");
888 DSSDBG("dsi_pll_calc\n");
891 memset(&best, 0, sizeof(best));
892 memset(&best_dispc, 0, sizeof(best_dispc));
894 memset(&cur, 0, sizeof(cur));
895 cur.clkin = dss_sys_clk;
899 /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */
900 /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */
901 /* To reduce PLL lock time, keep Fint high (around 2 MHz) */
902 for (cur.regn = 1; cur.regn < REGN_MAX; ++cur.regn) {
903 if (cur.highfreq == 0)
904 cur.fint = cur.clkin / cur.regn;
906 cur.fint = cur.clkin / (2 * cur.regn);
908 if (cur.fint > FINT_MAX || cur.fint < FINT_MIN)
911 /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */
912 for (cur.regm = 1; cur.regm < REGM_MAX; ++cur.regm) {
915 a = 2 * cur.regm * (cur.clkin/1000);
916 b = cur.regn * (cur.highfreq + 1);
917 cur.clkin4ddr = a / b * 1000;
919 if (cur.clkin4ddr > 1800 * 1000 * 1000)
922 /* dsi_pll_hsdiv_dispc_clk(MHz) =
923 * DSIPHY(MHz) / regm_dispc < 173MHz/186Mhz */
924 for (cur.regm_dispc = 1; cur.regm_dispc < REGM_DISPC_MAX;
926 struct dispc_clock_info cur_dispc;
927 cur.dsi_pll_hsdiv_dispc_clk =
928 cur.clkin4ddr / cur.regm_dispc;
930 /* this will narrow down the search a bit,
931 * but still give pixclocks below what was
933 if (cur.dsi_pll_hsdiv_dispc_clk < req_pck)
936 if (cur.dsi_pll_hsdiv_dispc_clk > max_dss_fck)
939 if (min_fck_per_pck &&
940 cur.dsi_pll_hsdiv_dispc_clk <
941 req_pck * min_fck_per_pck)
946 dispc_find_clk_divs(is_tft, req_pck,
947 cur.dsi_pll_hsdiv_dispc_clk,
950 if (abs(cur_dispc.pck - req_pck) <
951 abs(best_dispc.pck - req_pck)) {
953 best_dispc = cur_dispc;
955 if (cur_dispc.pck == req_pck)
963 if (min_fck_per_pck) {
964 DSSERR("Could not find suitable clock settings.\n"
965 "Turning FCK/PCK constraint off and"
971 DSSERR("Could not find suitable clock settings.\n");
976 /* dsi_pll_hsdiv_dsi_clk (regm_dsi) is not used */
978 best.dsi_pll_hsdiv_dsi_clk = 0;
983 *dispc_cinfo = best_dispc;
985 dsi.cache_req_pck = req_pck;
986 dsi.cache_clk_freq = 0;
987 dsi.cache_cinfo = best;
992 int dsi_pll_set_clock_div(struct dsi_clock_info *cinfo)
1000 dsi.current_cinfo.fint = cinfo->fint;
1001 dsi.current_cinfo.clkin4ddr = cinfo->clkin4ddr;
1002 dsi.current_cinfo.dsi_pll_hsdiv_dispc_clk =
1003 cinfo->dsi_pll_hsdiv_dispc_clk;
1004 dsi.current_cinfo.dsi_pll_hsdiv_dsi_clk =
1005 cinfo->dsi_pll_hsdiv_dsi_clk;
1007 dsi.current_cinfo.regn = cinfo->regn;
1008 dsi.current_cinfo.regm = cinfo->regm;
1009 dsi.current_cinfo.regm_dispc = cinfo->regm_dispc;
1010 dsi.current_cinfo.regm_dsi = cinfo->regm_dsi;
1012 DSSDBG("DSI Fint %ld\n", cinfo->fint);
1014 DSSDBG("clkin (%s) rate %ld, highfreq %d\n",
1015 cinfo->use_sys_clk ? "dss_sys_clk" : "pclkfree",
1019 /* DSIPHY == CLKIN4DDR */
1020 DSSDBG("CLKIN4DDR = 2 * %d / %d * %lu / %d = %lu\n",
1024 cinfo->highfreq + 1,
1027 DSSDBG("Data rate on 1 DSI lane %ld Mbps\n",
1028 cinfo->clkin4ddr / 1000 / 1000 / 2);
1030 DSSDBG("Clock lane freq %ld Hz\n", cinfo->clkin4ddr / 4);
1032 DSSDBG("regm_dispc = %d, %s (%s) = %lu\n", cinfo->regm_dispc,
1033 dss_get_generic_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1034 dss_feat_get_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
1035 cinfo->dsi_pll_hsdiv_dispc_clk);
1036 DSSDBG("regm_dsi = %d, %s (%s) = %lu\n", cinfo->regm_dsi,
1037 dss_get_generic_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1038 dss_feat_get_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
1039 cinfo->dsi_pll_hsdiv_dsi_clk);
1041 REG_FLD_MOD(DSI_PLL_CONTROL, 0, 0, 0); /* DSI_PLL_AUTOMODE = manual */
1043 l = dsi_read_reg(DSI_PLL_CONFIGURATION1);
1044 l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */
1045 l = FLD_MOD(l, cinfo->regn - 1, 7, 1); /* DSI_PLL_REGN */
1046 l = FLD_MOD(l, cinfo->regm, 18, 8); /* DSI_PLL_REGM */
1047 l = FLD_MOD(l, cinfo->regm_dispc > 0 ? cinfo->regm_dispc - 1 : 0,
1048 22, 19); /* DSI_CLOCK_DIV */
1049 l = FLD_MOD(l, cinfo->regm_dsi > 0 ? cinfo->regm_dsi - 1 : 0,
1050 26, 23); /* DSIPROTO_CLOCK_DIV */
1051 dsi_write_reg(DSI_PLL_CONFIGURATION1, l);
1053 BUG_ON(cinfo->fint < 750000 || cinfo->fint > 2100000);
1054 if (cinfo->fint < 1000000)
1056 else if (cinfo->fint < 1250000)
1058 else if (cinfo->fint < 1500000)
1060 else if (cinfo->fint < 1750000)
1065 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1066 l = FLD_MOD(l, f, 4, 1); /* DSI_PLL_FREQSEL */
1067 l = FLD_MOD(l, cinfo->use_sys_clk ? 0 : 1,
1068 11, 11); /* DSI_PLL_CLKSEL */
1069 l = FLD_MOD(l, cinfo->highfreq,
1070 12, 12); /* DSI_PLL_HIGHFREQ */
1071 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1072 l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */
1073 l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */
1074 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1076 REG_FLD_MOD(DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */
1078 if (wait_for_bit_change(DSI_PLL_GO, 0, 0) != 0) {
1079 DSSERR("dsi pll go bit not going down.\n");
1084 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) {
1085 DSSERR("cannot lock PLL\n");
1092 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1093 l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */
1094 l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */
1095 l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */
1096 l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */
1097 l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */
1098 l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */
1099 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1100 l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */
1101 l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */
1102 l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */
1103 l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */
1104 l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */
1105 l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */
1106 l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */
1107 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1109 DSSDBG("PLL config done\n");
1114 int dsi_pll_init(struct omap_dss_device *dssdev, bool enable_hsclk,
1118 enum dsi_pll_power_state pwstate;
1120 DSSDBG("PLL init\n");
1123 dsi_enable_pll_clock(1);
1125 r = regulator_enable(dsi.vdds_dsi_reg);
1129 /* XXX PLL does not come out of reset without this... */
1130 dispc_pck_free_enable(1);
1132 if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) {
1133 DSSERR("PLL not coming out of reset.\n");
1135 dispc_pck_free_enable(0);
1139 /* XXX ... but if left on, we get problems when planes do not
1140 * fill the whole display. No idea about this */
1141 dispc_pck_free_enable(0);
1143 if (enable_hsclk && enable_hsdiv)
1144 pwstate = DSI_PLL_POWER_ON_ALL;
1145 else if (enable_hsclk)
1146 pwstate = DSI_PLL_POWER_ON_HSCLK;
1147 else if (enable_hsdiv)
1148 pwstate = DSI_PLL_POWER_ON_DIV;
1150 pwstate = DSI_PLL_POWER_OFF;
1152 r = dsi_pll_power(pwstate);
1157 DSSDBG("PLL init done\n");
1161 regulator_disable(dsi.vdds_dsi_reg);
1164 dsi_enable_pll_clock(0);
1168 void dsi_pll_uninit(void)
1171 dsi_enable_pll_clock(0);
1174 dsi_pll_power(DSI_PLL_POWER_OFF);
1175 regulator_disable(dsi.vdds_dsi_reg);
1176 DSSDBG("PLL uninit done\n");
1179 void dsi_dump_clocks(struct seq_file *s)
1182 struct dsi_clock_info *cinfo = &dsi.current_cinfo;
1183 enum dss_clk_source dispc_clk_src, dsi_clk_src;
1185 dispc_clk_src = dss_get_dispc_clk_source();
1186 dsi_clk_src = dss_get_dsi_clk_source();
1190 clksel = REG_GET(DSI_PLL_CONFIGURATION2, 11, 11);
1192 seq_printf(s, "- DSI PLL -\n");
1194 seq_printf(s, "dsi pll source = %s\n",
1196 "dss_sys_clk" : "pclkfree");
1198 seq_printf(s, "Fint\t\t%-16luregn %u\n", cinfo->fint, cinfo->regn);
1200 seq_printf(s, "CLKIN4DDR\t%-16luregm %u\n",
1201 cinfo->clkin4ddr, cinfo->regm);
1203 seq_printf(s, "%s (%s)\t%-16luregm_dispc %u\t(%s)\n",
1204 dss_get_generic_clk_source_name(dispc_clk_src),
1205 dss_feat_get_clk_source_name(dispc_clk_src),
1206 cinfo->dsi_pll_hsdiv_dispc_clk,
1208 dispc_clk_src == DSS_CLK_SRC_FCK ?
1211 seq_printf(s, "%s (%s)\t%-16luregm_dsi %u\t(%s)\n",
1212 dss_get_generic_clk_source_name(dsi_clk_src),
1213 dss_feat_get_clk_source_name(dsi_clk_src),
1214 cinfo->dsi_pll_hsdiv_dsi_clk,
1216 dsi_clk_src == DSS_CLK_SRC_FCK ?
1219 seq_printf(s, "- DSI -\n");
1221 seq_printf(s, "dsi fclk source = %s (%s)\n",
1222 dss_get_generic_clk_source_name(dsi_clk_src),
1223 dss_feat_get_clk_source_name(dsi_clk_src));
1225 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate());
1227 seq_printf(s, "DDR_CLK\t\t%lu\n",
1228 cinfo->clkin4ddr / 4);
1230 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs());
1232 seq_printf(s, "LP_CLK\t\t%lu\n", cinfo->lp_clk);
1234 seq_printf(s, "VP_CLK\t\t%lu\n"
1236 dispc_lclk_rate(OMAP_DSS_CHANNEL_LCD),
1237 dispc_pclk_rate(OMAP_DSS_CHANNEL_LCD));
1242 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
1243 void dsi_dump_irqs(struct seq_file *s)
1245 unsigned long flags;
1246 struct dsi_irq_stats stats;
1248 spin_lock_irqsave(&dsi.irq_stats_lock, flags);
1250 stats = dsi.irq_stats;
1251 memset(&dsi.irq_stats, 0, sizeof(dsi.irq_stats));
1252 dsi.irq_stats.last_reset = jiffies;
1254 spin_unlock_irqrestore(&dsi.irq_stats_lock, flags);
1256 seq_printf(s, "period %u ms\n",
1257 jiffies_to_msecs(jiffies - stats.last_reset));
1259 seq_printf(s, "irqs %d\n", stats.irq_count);
1261 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1263 seq_printf(s, "-- DSI interrupts --\n");
1279 PIS(LDO_POWER_GOOD);
1284 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1285 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1286 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1287 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1288 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1290 seq_printf(s, "-- VC interrupts --\n");
1299 PIS(PP_BUSY_CHANGE);
1303 seq_printf(s, "%-20s %10d\n", #x, \
1304 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1306 seq_printf(s, "-- CIO interrupts --\n");
1319 PIS(ERRCONTENTIONLP0_1);
1320 PIS(ERRCONTENTIONLP1_1);
1321 PIS(ERRCONTENTIONLP0_2);
1322 PIS(ERRCONTENTIONLP1_2);
1323 PIS(ERRCONTENTIONLP0_3);
1324 PIS(ERRCONTENTIONLP1_3);
1325 PIS(ULPSACTIVENOT_ALL0);
1326 PIS(ULPSACTIVENOT_ALL1);
1331 void dsi_dump_regs(struct seq_file *s)
1333 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r))
1335 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK);
1337 DUMPREG(DSI_REVISION);
1338 DUMPREG(DSI_SYSCONFIG);
1339 DUMPREG(DSI_SYSSTATUS);
1340 DUMPREG(DSI_IRQSTATUS);
1341 DUMPREG(DSI_IRQENABLE);
1343 DUMPREG(DSI_COMPLEXIO_CFG1);
1344 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1345 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1346 DUMPREG(DSI_CLK_CTRL);
1347 DUMPREG(DSI_TIMING1);
1348 DUMPREG(DSI_TIMING2);
1349 DUMPREG(DSI_VM_TIMING1);
1350 DUMPREG(DSI_VM_TIMING2);
1351 DUMPREG(DSI_VM_TIMING3);
1352 DUMPREG(DSI_CLK_TIMING);
1353 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1354 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1355 DUMPREG(DSI_COMPLEXIO_CFG2);
1356 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1357 DUMPREG(DSI_VM_TIMING4);
1358 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1359 DUMPREG(DSI_VM_TIMING5);
1360 DUMPREG(DSI_VM_TIMING6);
1361 DUMPREG(DSI_VM_TIMING7);
1362 DUMPREG(DSI_STOPCLK_TIMING);
1364 DUMPREG(DSI_VC_CTRL(0));
1365 DUMPREG(DSI_VC_TE(0));
1366 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1367 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1368 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1369 DUMPREG(DSI_VC_IRQSTATUS(0));
1370 DUMPREG(DSI_VC_IRQENABLE(0));
1372 DUMPREG(DSI_VC_CTRL(1));
1373 DUMPREG(DSI_VC_TE(1));
1374 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1375 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1376 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1377 DUMPREG(DSI_VC_IRQSTATUS(1));
1378 DUMPREG(DSI_VC_IRQENABLE(1));
1380 DUMPREG(DSI_VC_CTRL(2));
1381 DUMPREG(DSI_VC_TE(2));
1382 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1383 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1384 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1385 DUMPREG(DSI_VC_IRQSTATUS(2));
1386 DUMPREG(DSI_VC_IRQENABLE(2));
1388 DUMPREG(DSI_VC_CTRL(3));
1389 DUMPREG(DSI_VC_TE(3));
1390 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1391 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1392 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1393 DUMPREG(DSI_VC_IRQSTATUS(3));
1394 DUMPREG(DSI_VC_IRQENABLE(3));
1396 DUMPREG(DSI_DSIPHY_CFG0);
1397 DUMPREG(DSI_DSIPHY_CFG1);
1398 DUMPREG(DSI_DSIPHY_CFG2);
1399 DUMPREG(DSI_DSIPHY_CFG5);
1401 DUMPREG(DSI_PLL_CONTROL);
1402 DUMPREG(DSI_PLL_STATUS);
1403 DUMPREG(DSI_PLL_GO);
1404 DUMPREG(DSI_PLL_CONFIGURATION1);
1405 DUMPREG(DSI_PLL_CONFIGURATION2);
1407 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
1411 enum dsi_complexio_power_state {
1412 DSI_COMPLEXIO_POWER_OFF = 0x0,
1413 DSI_COMPLEXIO_POWER_ON = 0x1,
1414 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1417 static int dsi_complexio_power(enum dsi_complexio_power_state state)
1422 REG_FLD_MOD(DSI_COMPLEXIO_CFG1, state, 28, 27);
1425 while (FLD_GET(dsi_read_reg(DSI_COMPLEXIO_CFG1), 26, 25) != state) {
1427 DSSERR("failed to set complexio power state to "
1437 static void dsi_complexio_config(struct omap_dss_device *dssdev)
1441 int clk_lane = dssdev->phy.dsi.clk_lane;
1442 int data1_lane = dssdev->phy.dsi.data1_lane;
1443 int data2_lane = dssdev->phy.dsi.data2_lane;
1444 int clk_pol = dssdev->phy.dsi.clk_pol;
1445 int data1_pol = dssdev->phy.dsi.data1_pol;
1446 int data2_pol = dssdev->phy.dsi.data2_pol;
1448 r = dsi_read_reg(DSI_COMPLEXIO_CFG1);
1449 r = FLD_MOD(r, clk_lane, 2, 0);
1450 r = FLD_MOD(r, clk_pol, 3, 3);
1451 r = FLD_MOD(r, data1_lane, 6, 4);
1452 r = FLD_MOD(r, data1_pol, 7, 7);
1453 r = FLD_MOD(r, data2_lane, 10, 8);
1454 r = FLD_MOD(r, data2_pol, 11, 11);
1455 dsi_write_reg(DSI_COMPLEXIO_CFG1, r);
1457 /* The configuration of the DSI complex I/O (number of data lanes,
1458 position, differential order) should not be changed while
1459 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for
1460 the hardware to take into account a new configuration of the complex
1461 I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to
1462 follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1,
1463 then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set
1464 DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the
1465 DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the
1466 DSI complex I/O configuration is unknown. */
1469 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1470 REG_FLD_MOD(DSI_CTRL, 0, 0, 0);
1471 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20);
1472 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1476 static inline unsigned ns2ddr(unsigned ns)
1478 /* convert time in ns to ddr ticks, rounding up */
1479 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1480 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1483 static inline unsigned ddr2ns(unsigned ddr)
1485 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1486 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1489 static void dsi_complexio_timings(void)
1492 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1493 u32 tlpx_half, tclk_trail, tclk_zero;
1496 /* calculate timings */
1498 /* 1 * DDR_CLK = 2 * UI */
1500 /* min 40ns + 4*UI max 85ns + 6*UI */
1501 ths_prepare = ns2ddr(70) + 2;
1503 /* min 145ns + 10*UI */
1504 ths_prepare_ths_zero = ns2ddr(175) + 2;
1506 /* min max(8*UI, 60ns+4*UI) */
1507 ths_trail = ns2ddr(60) + 5;
1510 ths_exit = ns2ddr(145);
1513 tlpx_half = ns2ddr(25);
1516 tclk_trail = ns2ddr(60) + 2;
1518 /* min 38ns, max 95ns */
1519 tclk_prepare = ns2ddr(65);
1521 /* min tclk-prepare + tclk-zero = 300ns */
1522 tclk_zero = ns2ddr(260);
1524 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1525 ths_prepare, ddr2ns(ths_prepare),
1526 ths_prepare_ths_zero, ddr2ns(ths_prepare_ths_zero));
1527 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1528 ths_trail, ddr2ns(ths_trail),
1529 ths_exit, ddr2ns(ths_exit));
1531 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1532 "tclk_zero %u (%uns)\n",
1533 tlpx_half, ddr2ns(tlpx_half),
1534 tclk_trail, ddr2ns(tclk_trail),
1535 tclk_zero, ddr2ns(tclk_zero));
1536 DSSDBG("tclk_prepare %u (%uns)\n",
1537 tclk_prepare, ddr2ns(tclk_prepare));
1539 /* program timings */
1541 r = dsi_read_reg(DSI_DSIPHY_CFG0);
1542 r = FLD_MOD(r, ths_prepare, 31, 24);
1543 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1544 r = FLD_MOD(r, ths_trail, 15, 8);
1545 r = FLD_MOD(r, ths_exit, 7, 0);
1546 dsi_write_reg(DSI_DSIPHY_CFG0, r);
1548 r = dsi_read_reg(DSI_DSIPHY_CFG1);
1549 r = FLD_MOD(r, tlpx_half, 22, 16);
1550 r = FLD_MOD(r, tclk_trail, 15, 8);
1551 r = FLD_MOD(r, tclk_zero, 7, 0);
1552 dsi_write_reg(DSI_DSIPHY_CFG1, r);
1554 r = dsi_read_reg(DSI_DSIPHY_CFG2);
1555 r = FLD_MOD(r, tclk_prepare, 7, 0);
1556 dsi_write_reg(DSI_DSIPHY_CFG2, r);
1560 static int dsi_complexio_init(struct omap_dss_device *dssdev)
1564 DSSDBG("dsi_complexio_init\n");
1566 /* CIO_CLK_ICG, enable L3 clk to CIO */
1567 REG_FLD_MOD(DSI_CLK_CTRL, 1, 14, 14);
1569 /* A dummy read using the SCP interface to any DSIPHY register is
1570 * required after DSIPHY reset to complete the reset of the DSI complex
1572 dsi_read_reg(DSI_DSIPHY_CFG5);
1574 if (wait_for_bit_change(DSI_DSIPHY_CFG5, 30, 1) != 1) {
1575 DSSERR("ComplexIO PHY not coming out of reset.\n");
1580 dsi_complexio_config(dssdev);
1582 r = dsi_complexio_power(DSI_COMPLEXIO_POWER_ON);
1587 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
1588 DSSERR("ComplexIO not coming out of reset.\n");
1593 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 21, 1) != 1) {
1594 DSSERR("ComplexIO LDO power down.\n");
1599 dsi_complexio_timings();
1602 The configuration of the DSI complex I/O (number of data lanes,
1603 position, differential order) should not be changed while
1604 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. For the
1605 hardware to recognize a new configuration of the complex I/O (done
1606 in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to follow
1607 this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1, next
1608 reset the DSS.DSI_CTRL[0] IF_EN to 0, then set DSS.DSI_CLK_CTRL[20]
1609 LP_CLK_ENABLE to 1, and finally, set again the DSS.DSI_CTRL[0] IF_EN
1610 bit to 1. If the sequence is not followed, the DSi complex I/O
1611 configuration is undetermined.
1615 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
1619 DSSDBG("CIO init done\n");
1624 static void dsi_complexio_uninit(void)
1626 dsi_complexio_power(DSI_COMPLEXIO_POWER_OFF);
1629 static int _dsi_wait_reset(void)
1633 while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) {
1635 DSSERR("soft reset failed\n");
1644 static int _dsi_reset(void)
1647 REG_FLD_MOD(DSI_SYSCONFIG, 1, 1, 1);
1648 return _dsi_wait_reset();
1651 static void dsi_config_tx_fifo(enum fifo_size size1, enum fifo_size size2,
1652 enum fifo_size size3, enum fifo_size size4)
1658 dsi.vc[0].fifo_size = size1;
1659 dsi.vc[1].fifo_size = size2;
1660 dsi.vc[2].fifo_size = size3;
1661 dsi.vc[3].fifo_size = size4;
1663 for (i = 0; i < 4; i++) {
1665 int size = dsi.vc[i].fifo_size;
1667 if (add + size > 4) {
1668 DSSERR("Illegal FIFO configuration\n");
1672 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
1674 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
1678 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, r);
1681 static void dsi_config_rx_fifo(enum fifo_size size1, enum fifo_size size2,
1682 enum fifo_size size3, enum fifo_size size4)
1688 dsi.vc[0].fifo_size = size1;
1689 dsi.vc[1].fifo_size = size2;
1690 dsi.vc[2].fifo_size = size3;
1691 dsi.vc[3].fifo_size = size4;
1693 for (i = 0; i < 4; i++) {
1695 int size = dsi.vc[i].fifo_size;
1697 if (add + size > 4) {
1698 DSSERR("Illegal FIFO configuration\n");
1702 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
1704 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
1708 dsi_write_reg(DSI_RX_FIFO_VC_SIZE, r);
1711 static int dsi_force_tx_stop_mode_io(void)
1715 r = dsi_read_reg(DSI_TIMING1);
1716 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
1717 dsi_write_reg(DSI_TIMING1, r);
1719 if (wait_for_bit_change(DSI_TIMING1, 15, 0) != 0) {
1720 DSSERR("TX_STOP bit not going down\n");
1727 static int dsi_vc_enable(int channel, bool enable)
1729 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
1732 enable = enable ? 1 : 0;
1734 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 0, 0);
1736 if (wait_for_bit_change(DSI_VC_CTRL(channel), 0, enable) != enable) {
1737 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
1744 static void dsi_vc_initial_config(int channel)
1748 DSSDBGF("%d", channel);
1750 r = dsi_read_reg(DSI_VC_CTRL(channel));
1752 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
1753 DSSERR("VC(%d) busy when trying to configure it!\n",
1756 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
1757 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
1758 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
1759 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
1760 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
1761 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
1762 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
1764 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
1765 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
1767 dsi_write_reg(DSI_VC_CTRL(channel), r);
1770 static int dsi_vc_config_l4(int channel)
1772 if (dsi.vc[channel].mode == DSI_VC_MODE_L4)
1775 DSSDBGF("%d", channel);
1777 dsi_vc_enable(channel, 0);
1780 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
1781 DSSERR("vc(%d) busy when trying to config for L4\n", channel);
1785 REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */
1787 dsi_vc_enable(channel, 1);
1789 dsi.vc[channel].mode = DSI_VC_MODE_L4;
1794 static int dsi_vc_config_vp(int channel)
1796 if (dsi.vc[channel].mode == DSI_VC_MODE_VP)
1799 DSSDBGF("%d", channel);
1801 dsi_vc_enable(channel, 0);
1804 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
1805 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
1809 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 1, 1); /* SOURCE, 1 = video port */
1811 dsi_vc_enable(channel, 1);
1813 dsi.vc[channel].mode = DSI_VC_MODE_VP;
1819 void omapdss_dsi_vc_enable_hs(int channel, bool enable)
1821 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
1823 WARN_ON(!dsi_bus_is_locked());
1825 dsi_vc_enable(channel, 0);
1828 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 9, 9);
1830 dsi_vc_enable(channel, 1);
1833 dsi_force_tx_stop_mode_io();
1835 EXPORT_SYMBOL(omapdss_dsi_vc_enable_hs);
1837 static void dsi_vc_flush_long_data(int channel)
1839 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
1841 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
1842 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
1846 (val >> 24) & 0xff);
1850 static void dsi_show_rx_ack_with_err(u16 err)
1852 DSSERR("\tACK with ERROR (%#x):\n", err);
1854 DSSERR("\t\tSoT Error\n");
1856 DSSERR("\t\tSoT Sync Error\n");
1858 DSSERR("\t\tEoT Sync Error\n");
1860 DSSERR("\t\tEscape Mode Entry Command Error\n");
1862 DSSERR("\t\tLP Transmit Sync Error\n");
1864 DSSERR("\t\tHS Receive Timeout Error\n");
1866 DSSERR("\t\tFalse Control Error\n");
1868 DSSERR("\t\t(reserved7)\n");
1870 DSSERR("\t\tECC Error, single-bit (corrected)\n");
1872 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
1873 if (err & (1 << 10))
1874 DSSERR("\t\tChecksum Error\n");
1875 if (err & (1 << 11))
1876 DSSERR("\t\tData type not recognized\n");
1877 if (err & (1 << 12))
1878 DSSERR("\t\tInvalid VC ID\n");
1879 if (err & (1 << 13))
1880 DSSERR("\t\tInvalid Transmission Length\n");
1881 if (err & (1 << 14))
1882 DSSERR("\t\t(reserved14)\n");
1883 if (err & (1 << 15))
1884 DSSERR("\t\tDSI Protocol Violation\n");
1887 static u16 dsi_vc_flush_receive_data(int channel)
1889 /* RX_FIFO_NOT_EMPTY */
1890 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
1893 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
1894 DSSERR("\trawval %#08x\n", val);
1895 dt = FLD_GET(val, 5, 0);
1896 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
1897 u16 err = FLD_GET(val, 23, 8);
1898 dsi_show_rx_ack_with_err(err);
1899 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
1900 DSSERR("\tDCS short response, 1 byte: %#x\n",
1901 FLD_GET(val, 23, 8));
1902 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
1903 DSSERR("\tDCS short response, 2 byte: %#x\n",
1904 FLD_GET(val, 23, 8));
1905 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
1906 DSSERR("\tDCS long response, len %d\n",
1907 FLD_GET(val, 23, 8));
1908 dsi_vc_flush_long_data(channel);
1910 DSSERR("\tunknown datatype 0x%02x\n", dt);
1916 static int dsi_vc_send_bta(int channel)
1918 if (dsi.debug_write || dsi.debug_read)
1919 DSSDBG("dsi_vc_send_bta %d\n", channel);
1921 WARN_ON(!dsi_bus_is_locked());
1923 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
1924 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
1925 dsi_vc_flush_receive_data(channel);
1928 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
1933 int dsi_vc_send_bta_sync(int channel)
1938 INIT_COMPLETION(dsi.bta_completion);
1940 dsi_vc_enable_bta_irq(channel);
1942 r = dsi_vc_send_bta(channel);
1946 if (wait_for_completion_timeout(&dsi.bta_completion,
1947 msecs_to_jiffies(500)) == 0) {
1948 DSSERR("Failed to receive BTA\n");
1953 err = dsi_get_errors();
1955 DSSERR("Error while sending BTA: %x\n", err);
1960 dsi_vc_disable_bta_irq(channel);
1964 EXPORT_SYMBOL(dsi_vc_send_bta_sync);
1966 static inline void dsi_vc_write_long_header(int channel, u8 data_type,
1972 WARN_ON(!dsi_bus_is_locked());
1974 data_id = data_type | dsi.vc[channel].vc_id << 6;
1976 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
1977 FLD_VAL(ecc, 31, 24);
1979 dsi_write_reg(DSI_VC_LONG_PACKET_HEADER(channel), val);
1982 static inline void dsi_vc_write_long_payload(int channel,
1983 u8 b1, u8 b2, u8 b3, u8 b4)
1987 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
1989 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
1990 b1, b2, b3, b4, val); */
1992 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
1995 static int dsi_vc_send_long(int channel, u8 data_type, u8 *data, u16 len,
2004 if (dsi.debug_write)
2005 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
2008 if (dsi.vc[channel].fifo_size * 32 * 4 < len + 4) {
2009 DSSERR("unable to send long packet: packet too long.\n");
2013 dsi_vc_config_l4(channel);
2015 dsi_vc_write_long_header(channel, data_type, len, ecc);
2018 for (i = 0; i < len >> 2; i++) {
2019 if (dsi.debug_write)
2020 DSSDBG("\tsending full packet %d\n", i);
2027 dsi_vc_write_long_payload(channel, b1, b2, b3, b4);
2032 b1 = 0; b2 = 0; b3 = 0;
2034 if (dsi.debug_write)
2035 DSSDBG("\tsending remainder bytes %d\n", i);
2052 dsi_vc_write_long_payload(channel, b1, b2, b3, 0);
2058 static int dsi_vc_send_short(int channel, u8 data_type, u16 data, u8 ecc)
2063 WARN_ON(!dsi_bus_is_locked());
2065 if (dsi.debug_write)
2066 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2068 data_type, data & 0xff, (data >> 8) & 0xff);
2070 dsi_vc_config_l4(channel);
2072 if (FLD_GET(dsi_read_reg(DSI_VC_CTRL(channel)), 16, 16)) {
2073 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2077 data_id = data_type | dsi.vc[channel].vc_id << 6;
2079 r = (data_id << 0) | (data << 8) | (ecc << 24);
2081 dsi_write_reg(DSI_VC_SHORT_PACKET_HEADER(channel), r);
2086 int dsi_vc_send_null(int channel)
2088 u8 nullpkg[] = {0, 0, 0, 0};
2089 return dsi_vc_send_long(channel, DSI_DT_NULL_PACKET, nullpkg, 4, 0);
2091 EXPORT_SYMBOL(dsi_vc_send_null);
2093 int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len)
2100 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_0,
2102 } else if (len == 2) {
2103 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_1,
2104 data[0] | (data[1] << 8), 0);
2106 /* 0x39 = DCS Long Write */
2107 r = dsi_vc_send_long(channel, DSI_DT_DCS_LONG_WRITE,
2113 EXPORT_SYMBOL(dsi_vc_dcs_write_nosync);
2115 int dsi_vc_dcs_write(int channel, u8 *data, int len)
2119 r = dsi_vc_dcs_write_nosync(channel, data, len);
2123 r = dsi_vc_send_bta_sync(channel);
2127 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2128 DSSERR("rx fifo not empty after write, dumping data:\n");
2129 dsi_vc_flush_receive_data(channel);
2136 DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
2137 channel, data[0], len);
2140 EXPORT_SYMBOL(dsi_vc_dcs_write);
2142 int dsi_vc_dcs_write_0(int channel, u8 dcs_cmd)
2144 return dsi_vc_dcs_write(channel, &dcs_cmd, 1);
2146 EXPORT_SYMBOL(dsi_vc_dcs_write_0);
2148 int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param)
2153 return dsi_vc_dcs_write(channel, buf, 2);
2155 EXPORT_SYMBOL(dsi_vc_dcs_write_1);
2157 int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
2164 DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %x)\n", channel, dcs_cmd);
2166 r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
2170 r = dsi_vc_send_bta_sync(channel);
2174 /* RX_FIFO_NOT_EMPTY */
2175 if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
2176 DSSERR("RX fifo empty when trying to read.\n");
2181 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2183 DSSDBG("\theader: %08x\n", val);
2184 dt = FLD_GET(val, 5, 0);
2185 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2186 u16 err = FLD_GET(val, 23, 8);
2187 dsi_show_rx_ack_with_err(err);
2191 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2192 u8 data = FLD_GET(val, 15, 8);
2194 DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
2204 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2205 u16 data = FLD_GET(val, 23, 8);
2207 DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
2214 buf[0] = data & 0xff;
2215 buf[1] = (data >> 8) & 0xff;
2218 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2220 int len = FLD_GET(val, 23, 8);
2222 DSSDBG("\tDCS long response, len %d\n", len);
2229 /* two byte checksum ends the packet, not included in len */
2230 for (w = 0; w < len + 2;) {
2232 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2234 DSSDBG("\t\t%02x %02x %02x %02x\n",
2238 (val >> 24) & 0xff);
2240 for (b = 0; b < 4; ++b) {
2242 buf[w] = (val >> (b * 8)) & 0xff;
2243 /* we discard the 2 byte checksum */
2250 DSSERR("\tunknown datatype 0x%02x\n", dt);
2257 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
2262 EXPORT_SYMBOL(dsi_vc_dcs_read);
2264 int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
2268 r = dsi_vc_dcs_read(channel, dcs_cmd, data, 1);
2278 EXPORT_SYMBOL(dsi_vc_dcs_read_1);
2280 int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u8 *data1, u8 *data2)
2285 r = dsi_vc_dcs_read(channel, dcs_cmd, buf, 2);
2298 EXPORT_SYMBOL(dsi_vc_dcs_read_2);
2300 int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
2302 return dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
2305 EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
2307 static void dsi_set_lp_rx_timeout(unsigned ticks, bool x4, bool x16)
2310 unsigned long total_ticks;
2313 BUG_ON(ticks > 0x1fff);
2315 /* ticks in DSI_FCK */
2316 fck = dsi_fclk_rate();
2318 r = dsi_read_reg(DSI_TIMING2);
2319 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
2320 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
2321 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
2322 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
2323 dsi_write_reg(DSI_TIMING2, r);
2325 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2327 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2329 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2330 (total_ticks * 1000) / (fck / 1000 / 1000));
2333 static void dsi_set_ta_timeout(unsigned ticks, bool x8, bool x16)
2336 unsigned long total_ticks;
2339 BUG_ON(ticks > 0x1fff);
2341 /* ticks in DSI_FCK */
2342 fck = dsi_fclk_rate();
2344 r = dsi_read_reg(DSI_TIMING1);
2345 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
2346 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
2347 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
2348 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
2349 dsi_write_reg(DSI_TIMING1, r);
2351 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
2353 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
2355 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
2356 (total_ticks * 1000) / (fck / 1000 / 1000));
2359 static void dsi_set_stop_state_counter(unsigned ticks, bool x4, bool x16)
2362 unsigned long total_ticks;
2365 BUG_ON(ticks > 0x1fff);
2367 /* ticks in DSI_FCK */
2368 fck = dsi_fclk_rate();
2370 r = dsi_read_reg(DSI_TIMING1);
2371 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2372 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
2373 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
2374 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
2375 dsi_write_reg(DSI_TIMING1, r);
2377 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2379 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
2381 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2382 (total_ticks * 1000) / (fck / 1000 / 1000));
2385 static void dsi_set_hs_tx_timeout(unsigned ticks, bool x4, bool x16)
2388 unsigned long total_ticks;
2391 BUG_ON(ticks > 0x1fff);
2393 /* ticks in TxByteClkHS */
2394 fck = dsi_get_txbyteclkhs();
2396 r = dsi_read_reg(DSI_TIMING2);
2397 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
2398 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
2399 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
2400 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
2401 dsi_write_reg(DSI_TIMING2, r);
2403 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2405 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2407 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2408 (total_ticks * 1000) / (fck / 1000 / 1000));
2410 static int dsi_proto_config(struct omap_dss_device *dssdev)
2415 dsi_config_tx_fifo(DSI_FIFO_SIZE_32,
2420 dsi_config_rx_fifo(DSI_FIFO_SIZE_32,
2425 /* XXX what values for the timeouts? */
2426 dsi_set_stop_state_counter(0x1000, false, false);
2427 dsi_set_ta_timeout(0x1fff, true, true);
2428 dsi_set_lp_rx_timeout(0x1fff, true, true);
2429 dsi_set_hs_tx_timeout(0x1fff, true, true);
2431 switch (dssdev->ctrl.pixel_size) {
2445 r = dsi_read_reg(DSI_CTRL);
2446 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
2447 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
2448 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
2449 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
2450 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
2451 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
2452 r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */
2453 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
2454 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
2455 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
2456 r = FLD_MOD(r, 0, 25, 25); /* DCS_CMD_CODE, 1=start, 0=continue */
2458 dsi_write_reg(DSI_CTRL, r);
2460 dsi_vc_initial_config(0);
2461 dsi_vc_initial_config(1);
2462 dsi_vc_initial_config(2);
2463 dsi_vc_initial_config(3);
2468 static void dsi_proto_timings(struct omap_dss_device *dssdev)
2470 unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail;
2471 unsigned tclk_pre, tclk_post;
2472 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
2473 unsigned ths_trail, ths_exit;
2474 unsigned ddr_clk_pre, ddr_clk_post;
2475 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
2479 r = dsi_read_reg(DSI_DSIPHY_CFG0);
2480 ths_prepare = FLD_GET(r, 31, 24);
2481 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
2482 ths_zero = ths_prepare_ths_zero - ths_prepare;
2483 ths_trail = FLD_GET(r, 15, 8);
2484 ths_exit = FLD_GET(r, 7, 0);
2486 r = dsi_read_reg(DSI_DSIPHY_CFG1);
2487 tlpx = FLD_GET(r, 22, 16) * 2;
2488 tclk_trail = FLD_GET(r, 15, 8);
2489 tclk_zero = FLD_GET(r, 7, 0);
2491 r = dsi_read_reg(DSI_DSIPHY_CFG2);
2492 tclk_prepare = FLD_GET(r, 7, 0);
2496 /* min 60ns + 52*UI */
2497 tclk_post = ns2ddr(60) + 26;
2499 /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */
2500 if (dssdev->phy.dsi.data1_lane != 0 &&
2501 dssdev->phy.dsi.data2_lane != 0)
2506 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
2508 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
2510 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
2511 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
2513 r = dsi_read_reg(DSI_CLK_TIMING);
2514 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
2515 r = FLD_MOD(r, ddr_clk_post, 7, 0);
2516 dsi_write_reg(DSI_CLK_TIMING, r);
2518 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
2522 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
2523 DIV_ROUND_UP(ths_prepare, 4) +
2524 DIV_ROUND_UP(ths_zero + 3, 4);
2526 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
2528 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
2529 FLD_VAL(exit_hs_mode_lat, 15, 0);
2530 dsi_write_reg(DSI_VM_TIMING7, r);
2532 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
2533 enter_hs_mode_lat, exit_hs_mode_lat);
2537 #define DSI_DECL_VARS \
2538 int __dsi_cb = 0; u32 __dsi_cv = 0;
2540 #define DSI_FLUSH(ch) \
2541 if (__dsi_cb > 0) { \
2542 /*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \
2543 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \
2544 __dsi_cb = __dsi_cv = 0; \
2547 #define DSI_PUSH(ch, data) \
2549 __dsi_cv |= (data) << (__dsi_cb * 8); \
2550 /*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \
2551 if (++__dsi_cb > 3) \
2555 static int dsi_update_screen_l4(struct omap_dss_device *dssdev,
2556 int x, int y, int w, int h)
2558 /* Note: supports only 24bit colors in 32bit container */
2560 int fifo_stalls = 0;
2561 int max_dsi_packet_size;
2562 int max_data_per_packet;
2563 int max_pixels_per_packet;
2565 int bytespp = dssdev->ctrl.pixel_size / 8;
2571 struct omap_overlay *ovl;
2575 DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n",
2578 ovl = dssdev->manager->overlays[0];
2580 if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U)
2583 if (dssdev->ctrl.pixel_size != 24)
2586 scr_width = ovl->info.screen_width;
2587 data = ovl->info.vaddr;
2589 start_offset = scr_width * y + x;
2590 horiz_inc = scr_width - w;
2593 /* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes
2596 /* When using CPU, max long packet size is TX buffer size */
2597 max_dsi_packet_size = dsi.vc[0].fifo_size * 32 * 4;
2599 /* we seem to get better perf if we divide the tx fifo to half,
2600 and while the other half is being sent, we fill the other half
2601 max_dsi_packet_size /= 2; */
2603 max_data_per_packet = max_dsi_packet_size - 4 - 1;
2605 max_pixels_per_packet = max_data_per_packet / bytespp;
2607 DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet);
2609 pixels_left = w * h;
2611 DSSDBG("total pixels %d\n", pixels_left);
2613 data += start_offset;
2615 while (pixels_left > 0) {
2616 /* 0x2c = write_memory_start */
2617 /* 0x3c = write_memory_continue */
2618 u8 dcs_cmd = first ? 0x2c : 0x3c;
2624 /* using fifo not empty */
2625 /* TX_FIFO_NOT_EMPTY */
2626 while (FLD_GET(dsi_read_reg(DSI_VC_CTRL(0)), 5, 5)) {
2628 if (fifo_stalls > 0xfffff) {
2629 DSSERR("fifo stalls overflow, pixels left %d\n",
2637 /* using fifo emptiness */
2638 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 <
2639 max_dsi_packet_size) {
2641 if (fifo_stalls > 0xfffff) {
2642 DSSERR("fifo stalls overflow, pixels left %d\n",
2649 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 == 0) {
2651 if (fifo_stalls > 0xfffff) {
2652 DSSERR("fifo stalls overflow, pixels left %d\n",
2659 pixels = min(max_pixels_per_packet, pixels_left);
2661 pixels_left -= pixels;
2663 dsi_vc_write_long_header(0, DSI_DT_DCS_LONG_WRITE,
2664 1 + pixels * bytespp, 0);
2666 DSI_PUSH(0, dcs_cmd);
2668 while (pixels-- > 0) {
2669 u32 pix = __raw_readl(data++);
2671 DSI_PUSH(0, (pix >> 16) & 0xff);
2672 DSI_PUSH(0, (pix >> 8) & 0xff);
2673 DSI_PUSH(0, (pix >> 0) & 0xff);
2676 if (current_x == x+w) {
2688 static void dsi_update_screen_dispc(struct omap_dss_device *dssdev,
2689 u16 x, u16 y, u16 w, u16 h)
2695 unsigned packet_payload;
2696 unsigned packet_len;
2699 const unsigned channel = dsi.update_channel;
2700 /* line buffer is 1024 x 24bits */
2701 /* XXX: for some reason using full buffer size causes considerable TX
2702 * slowdown with update sizes that fill the whole buffer */
2703 const unsigned line_buf_size = 1023 * 3;
2705 DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
2708 dsi_vc_config_vp(channel);
2710 bytespp = dssdev->ctrl.pixel_size / 8;
2711 bytespl = w * bytespp;
2712 bytespf = bytespl * h;
2714 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
2715 * number of lines in a packet. See errata about VP_CLK_RATIO */
2717 if (bytespf < line_buf_size)
2718 packet_payload = bytespf;
2720 packet_payload = (line_buf_size) / bytespl * bytespl;
2722 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
2723 total_len = (bytespf / packet_payload) * packet_len;
2725 if (bytespf % packet_payload)
2726 total_len += (bytespf % packet_payload) + 1;
2728 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
2729 dsi_write_reg(DSI_VC_TE(channel), l);
2731 dsi_vc_write_long_header(channel, DSI_DT_DCS_LONG_WRITE, packet_len, 0);
2734 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
2736 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
2737 dsi_write_reg(DSI_VC_TE(channel), l);
2739 /* We put SIDLEMODE to no-idle for the duration of the transfer,
2740 * because DSS interrupts are not capable of waking up the CPU and the
2741 * framedone interrupt could be delayed for quite a long time. I think
2742 * the same goes for any DSS interrupts, but for some reason I have not
2743 * seen the problem anywhere else than here.
2745 dispc_disable_sidle();
2747 dsi_perf_mark_start();
2749 r = queue_delayed_work(dsi.workqueue, &dsi.framedone_timeout_work,
2750 msecs_to_jiffies(250));
2753 dss_start_update(dssdev);
2755 if (dsi.te_enabled) {
2756 /* disable LP_RX_TO, so that we can receive TE. Time to wait
2757 * for TE is longer than the timer allows */
2758 REG_FLD_MOD(DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
2760 dsi_vc_send_bta(channel);
2762 #ifdef DSI_CATCH_MISSING_TE
2763 mod_timer(&dsi.te_timer, jiffies + msecs_to_jiffies(250));
2768 #ifdef DSI_CATCH_MISSING_TE
2769 static void dsi_te_timeout(unsigned long arg)
2771 DSSERR("TE not received for 250ms!\n");
2775 static void dsi_handle_framedone(int error)
2777 const int channel = dsi.update_channel;
2779 cancel_delayed_work(&dsi.framedone_timeout_work);
2781 dsi_vc_disable_bta_irq(channel);
2783 /* SIDLEMODE back to smart-idle */
2784 dispc_enable_sidle();
2786 dsi.bta_callback = NULL;
2788 if (dsi.te_enabled) {
2789 /* enable LP_RX_TO again after the TE */
2790 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
2793 /* RX_FIFO_NOT_EMPTY */
2794 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2795 DSSERR("Received error during frame transfer:\n");
2796 dsi_vc_flush_receive_data(channel);
2801 dsi.framedone_callback(error, dsi.framedone_data);
2804 dsi_perf_show("DISPC");
2807 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
2809 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
2810 * 250ms which would conflict with this timeout work. What should be
2811 * done is first cancel the transfer on the HW, and then cancel the
2812 * possibly scheduled framedone work. However, cancelling the transfer
2813 * on the HW is buggy, and would probably require resetting the whole
2816 DSSERR("Framedone not received for 250ms!\n");
2818 dsi_handle_framedone(-ETIMEDOUT);
2821 static void dsi_framedone_bta_callback(void)
2823 dsi_handle_framedone(0);
2825 #ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
2826 dispc_fake_vsync_irq();
2830 static void dsi_framedone_irq_callback(void *data, u32 mask)
2832 const int channel = dsi.update_channel;
2835 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
2836 * turns itself off. However, DSI still has the pixels in its buffers,
2837 * and is sending the data.
2840 if (dsi.te_enabled) {
2841 /* enable LP_RX_TO again after the TE */
2842 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
2845 /* Send BTA after the frame. We need this for the TE to work, as TE
2846 * trigger is only sent for BTAs without preceding packet. Thus we need
2847 * to BTA after the pixel packets so that next BTA will cause TE
2850 * This is not needed when TE is not in use, but we do it anyway to
2851 * make sure that the transfer has been completed. It would be more
2852 * optimal, but more complex, to wait only just before starting next
2855 * Also, as there's no interrupt telling when the transfer has been
2856 * done and the channel could be reconfigured, the only way is to
2857 * busyloop until TE_SIZE is zero. With BTA we can do this
2861 dsi.bta_callback = dsi_framedone_bta_callback;
2865 dsi_vc_enable_bta_irq(channel);
2867 r = dsi_vc_send_bta(channel);
2869 DSSERR("BTA after framedone failed\n");
2870 dsi_handle_framedone(-EIO);
2874 int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
2875 u16 *x, u16 *y, u16 *w, u16 *h,
2876 bool enlarge_update_area)
2880 dssdev->driver->get_resolution(dssdev, &dw, &dh);
2882 if (*x > dw || *y > dh)
2894 if (*w == 0 || *h == 0)
2897 dsi_perf_mark_setup();
2899 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
2900 dss_setup_partial_planes(dssdev, x, y, w, h,
2901 enlarge_update_area);
2902 dispc_set_lcd_size(dssdev->manager->id, *w, *h);
2907 EXPORT_SYMBOL(omap_dsi_prepare_update);
2909 int omap_dsi_update(struct omap_dss_device *dssdev,
2911 u16 x, u16 y, u16 w, u16 h,
2912 void (*callback)(int, void *), void *data)
2914 dsi.update_channel = channel;
2916 /* OMAP DSS cannot send updates of odd widths.
2917 * omap_dsi_prepare_update() makes the widths even, but add a BUG_ON
2918 * here to make sure we catch erroneous updates. Otherwise we'll only
2919 * see rather obscure HW error happening, as DSS halts. */
2922 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
2923 dsi.framedone_callback = callback;
2924 dsi.framedone_data = data;
2926 dsi.update_region.x = x;
2927 dsi.update_region.y = y;
2928 dsi.update_region.w = w;
2929 dsi.update_region.h = h;
2930 dsi.update_region.device = dssdev;
2932 dsi_update_screen_dispc(dssdev, x, y, w, h);
2936 r = dsi_update_screen_l4(dssdev, x, y, w, h);
2940 dsi_perf_show("L4");
2946 EXPORT_SYMBOL(omap_dsi_update);
2950 static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
2954 r = omap_dispc_register_isr(dsi_framedone_irq_callback, NULL,
2955 DISPC_IRQ_FRAMEDONE);
2957 DSSERR("can't get FRAMEDONE irq\n");
2961 dispc_set_lcd_display_type(dssdev->manager->id,
2962 OMAP_DSS_LCD_DISPLAY_TFT);
2964 dispc_set_parallel_interface_mode(dssdev->manager->id,
2965 OMAP_DSS_PARALLELMODE_DSI);
2966 dispc_enable_fifohandcheck(dssdev->manager->id, 1);
2968 dispc_set_tft_data_lines(dssdev->manager->id, dssdev->ctrl.pixel_size);
2971 struct omap_video_timings timings = {
2980 dispc_set_lcd_timings(dssdev->manager->id, &timings);
2986 static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev)
2988 omap_dispc_unregister_isr(dsi_framedone_irq_callback, NULL,
2989 DISPC_IRQ_FRAMEDONE);
2992 static int dsi_configure_dsi_clocks(struct omap_dss_device *dssdev)
2994 struct dsi_clock_info cinfo;
2997 /* we always use DSS_CLK_SYSCK as input clock */
2998 cinfo.use_sys_clk = true;
2999 cinfo.regn = dssdev->phy.dsi.div.regn;
3000 cinfo.regm = dssdev->phy.dsi.div.regm;
3001 cinfo.regm_dispc = dssdev->phy.dsi.div.regm_dispc;
3002 cinfo.regm_dsi = dssdev->phy.dsi.div.regm_dsi;
3003 r = dsi_calc_clock_rates(dssdev, &cinfo);
3005 DSSERR("Failed to calc dsi clocks\n");
3009 r = dsi_pll_set_clock_div(&cinfo);
3011 DSSERR("Failed to set dsi clocks\n");
3018 static int dsi_configure_dispc_clocks(struct omap_dss_device *dssdev)
3020 struct dispc_clock_info dispc_cinfo;
3022 unsigned long long fck;
3024 fck = dsi_get_pll_hsdiv_dispc_rate();
3026 dispc_cinfo.lck_div = dssdev->phy.dsi.div.lck_div;
3027 dispc_cinfo.pck_div = dssdev->phy.dsi.div.pck_div;
3029 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
3031 DSSERR("Failed to calc dispc clocks\n");
3035 r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
3037 DSSERR("Failed to set dispc clocks\n");
3044 static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
3048 _dsi_print_reset_status();
3050 r = dsi_pll_init(dssdev, true, true);
3054 r = dsi_configure_dsi_clocks(dssdev);
3058 dss_select_dispc_clk_source(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC);
3059 dss_select_dsi_clk_source(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI);
3063 r = dsi_configure_dispc_clocks(dssdev);
3067 r = dsi_complexio_init(dssdev);
3071 _dsi_print_reset_status();
3073 dsi_proto_timings(dssdev);
3074 dsi_set_lp_clk_divisor(dssdev);
3077 _dsi_print_reset_status();
3079 r = dsi_proto_config(dssdev);
3083 /* enable interface */
3084 dsi_vc_enable(0, 1);
3085 dsi_vc_enable(1, 1);
3086 dsi_vc_enable(2, 1);
3087 dsi_vc_enable(3, 1);
3089 dsi_force_tx_stop_mode_io();
3093 dsi_complexio_uninit();
3095 dss_select_dispc_clk_source(DSS_CLK_SRC_FCK);
3096 dss_select_dsi_clk_source(DSS_CLK_SRC_FCK);
3103 static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev)
3105 /* disable interface */
3107 dsi_vc_enable(0, 0);
3108 dsi_vc_enable(1, 0);
3109 dsi_vc_enable(2, 0);
3110 dsi_vc_enable(3, 0);
3112 dss_select_dispc_clk_source(DSS_CLK_SRC_FCK);
3113 dss_select_dsi_clk_source(DSS_CLK_SRC_FCK);
3114 dsi_complexio_uninit();
3118 static int dsi_core_init(void)
3121 REG_FLD_MOD(DSI_SYSCONFIG, 1, 0, 0);
3124 REG_FLD_MOD(DSI_SYSCONFIG, 1, 2, 2);
3126 /* SIDLEMODE smart-idle */
3127 REG_FLD_MOD(DSI_SYSCONFIG, 2, 4, 3);
3129 _dsi_initialize_irq();
3134 int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
3138 DSSDBG("dsi_display_enable\n");
3140 WARN_ON(!dsi_bus_is_locked());
3142 mutex_lock(&dsi.lock);
3144 r = omap_dss_start_device(dssdev);
3146 DSSERR("failed to start device\n");
3151 dsi_enable_pll_clock(1);
3159 r = dsi_display_init_dispc(dssdev);
3163 r = dsi_display_init_dsi(dssdev);
3167 mutex_unlock(&dsi.lock);
3172 dsi_display_uninit_dispc(dssdev);
3175 dsi_enable_pll_clock(0);
3176 omap_dss_stop_device(dssdev);
3178 mutex_unlock(&dsi.lock);
3179 DSSDBG("dsi_display_enable FAILED\n");
3182 EXPORT_SYMBOL(omapdss_dsi_display_enable);
3184 void omapdss_dsi_display_disable(struct omap_dss_device *dssdev)
3186 DSSDBG("dsi_display_disable\n");
3188 WARN_ON(!dsi_bus_is_locked());
3190 mutex_lock(&dsi.lock);
3192 dsi_display_uninit_dispc(dssdev);
3194 dsi_display_uninit_dsi(dssdev);
3197 dsi_enable_pll_clock(0);
3199 omap_dss_stop_device(dssdev);
3201 mutex_unlock(&dsi.lock);
3203 EXPORT_SYMBOL(omapdss_dsi_display_disable);
3205 int omapdss_dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
3207 dsi.te_enabled = enable;
3210 EXPORT_SYMBOL(omapdss_dsi_enable_te);
3212 void dsi_get_overlay_fifo_thresholds(enum omap_plane plane,
3213 u32 fifo_size, enum omap_burst_size *burst_size,
3214 u32 *fifo_low, u32 *fifo_high)
3216 unsigned burst_size_bytes;
3218 *burst_size = OMAP_DSS_BURST_16x32;
3219 burst_size_bytes = 16 * 32 / 8;
3221 *fifo_high = fifo_size - burst_size_bytes;
3222 *fifo_low = fifo_size - burst_size_bytes * 2;
3225 int dsi_init_display(struct omap_dss_device *dssdev)
3227 DSSDBG("DSI init\n");
3229 /* XXX these should be figured out dynamically */
3230 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
3231 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
3233 if (dsi.vdds_dsi_reg == NULL) {
3234 struct regulator *vdds_dsi;
3236 vdds_dsi = regulator_get(&dsi.pdev->dev, "vdds_dsi");
3238 if (IS_ERR(vdds_dsi)) {
3239 DSSERR("can't get VDDS_DSI regulator\n");
3240 return PTR_ERR(vdds_dsi);
3243 dsi.vdds_dsi_reg = vdds_dsi;
3249 int omap_dsi_request_vc(struct omap_dss_device *dssdev, int *channel)
3253 for (i = 0; i < ARRAY_SIZE(dsi.vc); i++) {
3254 if (!dsi.vc[i].dssdev) {
3255 dsi.vc[i].dssdev = dssdev;
3261 DSSERR("cannot get VC for display %s", dssdev->name);
3264 EXPORT_SYMBOL(omap_dsi_request_vc);
3266 int omap_dsi_set_vc_id(struct omap_dss_device *dssdev, int channel, int vc_id)
3268 if (vc_id < 0 || vc_id > 3) {
3269 DSSERR("VC ID out of range\n");
3273 if (channel < 0 || channel > 3) {
3274 DSSERR("Virtual Channel out of range\n");
3278 if (dsi.vc[channel].dssdev != dssdev) {
3279 DSSERR("Virtual Channel not allocated to display %s\n",
3284 dsi.vc[channel].vc_id = vc_id;
3288 EXPORT_SYMBOL(omap_dsi_set_vc_id);
3290 void omap_dsi_release_vc(struct omap_dss_device *dssdev, int channel)
3292 if ((channel >= 0 && channel <= 3) &&
3293 dsi.vc[channel].dssdev == dssdev) {
3294 dsi.vc[channel].dssdev = NULL;
3295 dsi.vc[channel].vc_id = 0;
3298 EXPORT_SYMBOL(omap_dsi_release_vc);
3300 void dsi_wait_pll_hsdiv_dispc_active(void)
3302 if (wait_for_bit_change(DSI_PLL_STATUS, 7, 1) != 1)
3303 DSSERR("%s (%s) not active\n",
3304 dss_get_generic_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC),
3305 dss_feat_get_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC));
3308 void dsi_wait_pll_hsdiv_dsi_active(void)
3310 if (wait_for_bit_change(DSI_PLL_STATUS, 8, 1) != 1)
3311 DSSERR("%s (%s) not active\n",
3312 dss_get_generic_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI),
3313 dss_feat_get_clk_source_name(DSS_CLK_SRC_DSI_PLL_HSDIV_DSI));
3316 static int dsi_init(struct platform_device *pdev)
3320 struct resource *dsi_mem;
3322 spin_lock_init(&dsi.errors_lock);
3325 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
3326 spin_lock_init(&dsi.irq_stats_lock);
3327 dsi.irq_stats.last_reset = jiffies;
3330 init_completion(&dsi.bta_completion);
3332 mutex_init(&dsi.lock);
3333 sema_init(&dsi.bus_lock, 1);
3335 dsi.workqueue = create_singlethread_workqueue("dsi");
3336 if (dsi.workqueue == NULL)
3339 INIT_DELAYED_WORK_DEFERRABLE(&dsi.framedone_timeout_work,
3340 dsi_framedone_timeout_work_callback);
3342 #ifdef DSI_CATCH_MISSING_TE
3343 init_timer(&dsi.te_timer);
3344 dsi.te_timer.function = dsi_te_timeout;
3345 dsi.te_timer.data = 0;
3347 dsi_mem = platform_get_resource(dsi.pdev, IORESOURCE_MEM, 0);
3349 DSSERR("can't get IORESOURCE_MEM DSI\n");
3353 dsi.base = ioremap(dsi_mem->start, resource_size(dsi_mem));
3355 DSSERR("can't ioremap DSI\n");
3359 dsi.irq = platform_get_irq(dsi.pdev, 0);
3361 DSSERR("platform_get_irq failed\n");
3366 r = request_irq(dsi.irq, omap_dsi_irq_handler, IRQF_SHARED,
3367 "OMAP DSI1", dsi.pdev);
3369 DSSERR("request_irq failed\n");
3373 /* DSI VCs initialization */
3374 for (i = 0; i < ARRAY_SIZE(dsi.vc); i++) {
3375 dsi.vc[i].mode = DSI_VC_MODE_L4;
3376 dsi.vc[i].dssdev = NULL;
3377 dsi.vc[i].vc_id = 0;
3382 rev = dsi_read_reg(DSI_REVISION);
3383 dev_dbg(&pdev->dev, "OMAP DSI rev %d.%d\n",
3384 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
3392 destroy_workqueue(dsi.workqueue);
3396 static void dsi_exit(void)
3398 if (dsi.vdds_dsi_reg != NULL) {
3399 regulator_put(dsi.vdds_dsi_reg);
3400 dsi.vdds_dsi_reg = NULL;
3403 free_irq(dsi.irq, dsi.pdev);
3406 destroy_workqueue(dsi.workqueue);
3408 DSSDBG("omap_dsi_exit\n");
3411 /* DSI1 HW IP initialisation */
3412 static int omap_dsi1hw_probe(struct platform_device *pdev)
3418 DSSERR("Failed to initialize DSI\n");
3425 static int omap_dsi1hw_remove(struct platform_device *pdev)
3431 static struct platform_driver omap_dsi1hw_driver = {
3432 .probe = omap_dsi1hw_probe,
3433 .remove = omap_dsi1hw_remove,
3435 .name = "omapdss_dsi1",
3436 .owner = THIS_MODULE,
3440 int dsi_init_platform_driver(void)
3442 return platform_driver_register(&omap_dsi1hw_driver);
3445 void dsi_uninit_platform_driver(void)
3447 return platform_driver_unregister(&omap_dsi1hw_driver);