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>
42 /*#define VERBOSE_IRQ*/
43 #define DSI_CATCH_MISSING_TE
45 #define DSI_BASE 0x4804FC00
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)
95 /* DSI_PLL_CTRL_SCP */
97 #define DSI_PLL_CONTROL DSI_REG(0x300 + 0x0000)
98 #define DSI_PLL_STATUS DSI_REG(0x300 + 0x0004)
99 #define DSI_PLL_GO DSI_REG(0x300 + 0x0008)
100 #define DSI_PLL_CONFIGURATION1 DSI_REG(0x300 + 0x000C)
101 #define DSI_PLL_CONFIGURATION2 DSI_REG(0x300 + 0x0010)
103 #define REG_GET(idx, start, end) \
104 FLD_GET(dsi_read_reg(idx), start, end)
106 #define REG_FLD_MOD(idx, val, start, end) \
107 dsi_write_reg(idx, FLD_MOD(dsi_read_reg(idx), val, start, end))
109 /* Global interrupts */
110 #define DSI_IRQ_VC0 (1 << 0)
111 #define DSI_IRQ_VC1 (1 << 1)
112 #define DSI_IRQ_VC2 (1 << 2)
113 #define DSI_IRQ_VC3 (1 << 3)
114 #define DSI_IRQ_WAKEUP (1 << 4)
115 #define DSI_IRQ_RESYNC (1 << 5)
116 #define DSI_IRQ_PLL_LOCK (1 << 7)
117 #define DSI_IRQ_PLL_UNLOCK (1 << 8)
118 #define DSI_IRQ_PLL_RECALL (1 << 9)
119 #define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
120 #define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
121 #define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
122 #define DSI_IRQ_TE_TRIGGER (1 << 16)
123 #define DSI_IRQ_ACK_TRIGGER (1 << 17)
124 #define DSI_IRQ_SYNC_LOST (1 << 18)
125 #define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
126 #define DSI_IRQ_TA_TIMEOUT (1 << 20)
127 #define DSI_IRQ_ERROR_MASK \
128 (DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
130 #define DSI_IRQ_CHANNEL_MASK 0xf
132 /* Virtual channel interrupts */
133 #define DSI_VC_IRQ_CS (1 << 0)
134 #define DSI_VC_IRQ_ECC_CORR (1 << 1)
135 #define DSI_VC_IRQ_PACKET_SENT (1 << 2)
136 #define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
137 #define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
138 #define DSI_VC_IRQ_BTA (1 << 5)
139 #define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
140 #define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
141 #define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
142 #define DSI_VC_IRQ_ERROR_MASK \
143 (DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
144 DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
145 DSI_VC_IRQ_FIFO_TX_UDF)
147 /* ComplexIO interrupts */
148 #define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
149 #define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
150 #define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
151 #define DSI_CIO_IRQ_ERRESC1 (1 << 5)
152 #define DSI_CIO_IRQ_ERRESC2 (1 << 6)
153 #define DSI_CIO_IRQ_ERRESC3 (1 << 7)
154 #define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
155 #define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
156 #define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
157 #define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
158 #define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
159 #define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
160 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
161 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
162 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
163 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
164 #define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
165 #define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
166 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
167 #define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
169 #define DSI_DT_DCS_SHORT_WRITE_0 0x05
170 #define DSI_DT_DCS_SHORT_WRITE_1 0x15
171 #define DSI_DT_DCS_READ 0x06
172 #define DSI_DT_SET_MAX_RET_PKG_SIZE 0x37
173 #define DSI_DT_NULL_PACKET 0x09
174 #define DSI_DT_DCS_LONG_WRITE 0x39
176 #define DSI_DT_RX_ACK_WITH_ERR 0x02
177 #define DSI_DT_RX_DCS_LONG_READ 0x1c
178 #define DSI_DT_RX_SHORT_READ_1 0x21
179 #define DSI_DT_RX_SHORT_READ_2 0x22
181 #define FINT_MAX 2100000
182 #define FINT_MIN 750000
183 #define REGN_MAX (1 << 7)
184 #define REGM_MAX ((1 << 11) - 1)
185 #define REGM3_MAX (1 << 4)
186 #define REGM4_MAX (1 << 4)
187 #define LP_DIV_MAX ((1 << 13) - 1)
191 DSI_FIFO_SIZE_32 = 1,
192 DSI_FIFO_SIZE_64 = 2,
193 DSI_FIFO_SIZE_96 = 3,
194 DSI_FIFO_SIZE_128 = 4,
202 struct dsi_update_region {
204 struct omap_dss_device *device;
207 struct dsi_irq_stats {
208 unsigned long last_reset;
210 unsigned dsi_irqs[32];
211 unsigned vc_irqs[4][32];
212 unsigned cio_irqs[32];
219 struct dsi_clock_info current_cinfo;
221 struct regulator *vdds_dsi_reg;
224 enum dsi_vc_mode mode;
225 struct omap_dss_device *dssdev;
226 enum fifo_size fifo_size;
230 struct semaphore bus_lock;
234 struct completion bta_completion;
237 struct dsi_update_region update_region;
241 struct workqueue_struct *workqueue;
243 struct work_struct framedone_work;
244 void (*framedone_callback)(int, void *);
245 void *framedone_data;
247 struct delayed_work framedone_timeout_work;
249 #ifdef DSI_CATCH_MISSING_TE
250 struct timer_list te_timer;
253 unsigned long cache_req_pck;
254 unsigned long cache_clk_freq;
255 struct dsi_clock_info cache_cinfo;
258 spinlock_t errors_lock;
260 ktime_t perf_setup_time;
261 ktime_t perf_start_time;
266 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
267 spinlock_t irq_stats_lock;
268 struct dsi_irq_stats irq_stats;
273 static unsigned int dsi_perf;
274 module_param_named(dsi_perf, dsi_perf, bool, 0644);
277 static inline void dsi_write_reg(const struct dsi_reg idx, u32 val)
279 __raw_writel(val, dsi.base + idx.idx);
282 static inline u32 dsi_read_reg(const struct dsi_reg idx)
284 return __raw_readl(dsi.base + idx.idx);
288 void dsi_save_context(void)
292 void dsi_restore_context(void)
296 void dsi_bus_lock(void)
300 EXPORT_SYMBOL(dsi_bus_lock);
302 void dsi_bus_unlock(void)
306 EXPORT_SYMBOL(dsi_bus_unlock);
308 static bool dsi_bus_is_locked(void)
310 return dsi.bus_lock.count == 0;
313 static inline int wait_for_bit_change(const struct dsi_reg idx, int bitnum,
318 while (REG_GET(idx, bitnum, bitnum) != value) {
327 static void dsi_perf_mark_setup(void)
329 dsi.perf_setup_time = ktime_get();
332 static void dsi_perf_mark_start(void)
334 dsi.perf_start_time = ktime_get();
337 static void dsi_perf_show(const char *name)
339 ktime_t t, setup_time, trans_time;
341 u32 setup_us, trans_us, total_us;
348 setup_time = ktime_sub(dsi.perf_start_time, dsi.perf_setup_time);
349 setup_us = (u32)ktime_to_us(setup_time);
353 trans_time = ktime_sub(t, dsi.perf_start_time);
354 trans_us = (u32)ktime_to_us(trans_time);
358 total_us = setup_us + trans_us;
360 total_bytes = dsi.update_region.w *
361 dsi.update_region.h *
362 dsi.update_region.device->ctrl.pixel_size / 8;
364 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
365 "%u bytes, %u kbytes/sec\n",
370 1000*1000 / total_us,
372 total_bytes * 1000 / total_us);
375 #define dsi_perf_mark_setup()
376 #define dsi_perf_mark_start()
377 #define dsi_perf_show(x)
380 static void print_irq_status(u32 status)
383 if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0)
386 printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status);
389 if (status & DSI_IRQ_##x) \
415 static void print_irq_status_vc(int channel, u32 status)
418 if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
421 printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status);
424 if (status & DSI_VC_IRQ_##x) \
441 static void print_irq_status_cio(u32 status)
443 printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status);
446 if (status & DSI_CIO_IRQ_##x) \
460 PIS(ERRCONTENTIONLP0_1);
461 PIS(ERRCONTENTIONLP1_1);
462 PIS(ERRCONTENTIONLP0_2);
463 PIS(ERRCONTENTIONLP1_2);
464 PIS(ERRCONTENTIONLP0_3);
465 PIS(ERRCONTENTIONLP1_3);
466 PIS(ULPSACTIVENOT_ALL0);
467 PIS(ULPSACTIVENOT_ALL1);
473 static int debug_irq;
475 /* called from dss */
476 void dsi_irq_handler(void)
478 u32 irqstatus, vcstatus, ciostatus;
481 irqstatus = dsi_read_reg(DSI_IRQSTATUS);
483 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
484 spin_lock(&dsi.irq_stats_lock);
485 dsi.irq_stats.irq_count++;
486 dss_collect_irq_stats(irqstatus, dsi.irq_stats.dsi_irqs);
489 if (irqstatus & DSI_IRQ_ERROR_MASK) {
490 DSSERR("DSI error, irqstatus %x\n", irqstatus);
491 print_irq_status(irqstatus);
492 spin_lock(&dsi.errors_lock);
493 dsi.errors |= irqstatus & DSI_IRQ_ERROR_MASK;
494 spin_unlock(&dsi.errors_lock);
495 } else if (debug_irq) {
496 print_irq_status(irqstatus);
499 #ifdef DSI_CATCH_MISSING_TE
500 if (irqstatus & DSI_IRQ_TE_TRIGGER)
501 del_timer(&dsi.te_timer);
504 for (i = 0; i < 4; ++i) {
505 if ((irqstatus & (1<<i)) == 0)
508 vcstatus = dsi_read_reg(DSI_VC_IRQSTATUS(i));
510 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
511 dss_collect_irq_stats(vcstatus, dsi.irq_stats.vc_irqs[i]);
514 if (vcstatus & DSI_VC_IRQ_BTA)
515 complete(&dsi.bta_completion);
517 if (vcstatus & DSI_VC_IRQ_ERROR_MASK) {
518 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
520 print_irq_status_vc(i, vcstatus);
521 } else if (debug_irq) {
522 print_irq_status_vc(i, vcstatus);
525 dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus);
526 /* flush posted write */
527 dsi_read_reg(DSI_VC_IRQSTATUS(i));
530 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
531 ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
533 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
534 dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);
537 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
538 /* flush posted write */
539 dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
541 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
542 print_irq_status_cio(ciostatus);
545 dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
546 /* flush posted write */
547 dsi_read_reg(DSI_IRQSTATUS);
549 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
550 spin_unlock(&dsi.irq_stats_lock);
555 static void _dsi_initialize_irq(void)
560 /* disable all interrupts */
561 dsi_write_reg(DSI_IRQENABLE, 0);
562 for (i = 0; i < 4; ++i)
563 dsi_write_reg(DSI_VC_IRQENABLE(i), 0);
564 dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, 0);
566 /* clear interrupt status */
567 l = dsi_read_reg(DSI_IRQSTATUS);
568 dsi_write_reg(DSI_IRQSTATUS, l & ~DSI_IRQ_CHANNEL_MASK);
570 for (i = 0; i < 4; ++i) {
571 l = dsi_read_reg(DSI_VC_IRQSTATUS(i));
572 dsi_write_reg(DSI_VC_IRQSTATUS(i), l);
575 l = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
576 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, l);
578 /* enable error irqs */
579 l = DSI_IRQ_ERROR_MASK;
580 #ifdef DSI_CATCH_MISSING_TE
581 l |= DSI_IRQ_TE_TRIGGER;
583 dsi_write_reg(DSI_IRQENABLE, l);
585 l = DSI_VC_IRQ_ERROR_MASK;
586 for (i = 0; i < 4; ++i)
587 dsi_write_reg(DSI_VC_IRQENABLE(i), l);
589 /* XXX zonda responds incorrectly, causing control error:
590 Exit from LP-ESC mode to LP11 uses wrong transition states on the
591 data lines LP0 and LN0. */
592 dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE,
593 -1 & (~DSI_CIO_IRQ_ERRCONTROL2));
596 static u32 dsi_get_errors(void)
600 spin_lock_irqsave(&dsi.errors_lock, flags);
603 spin_unlock_irqrestore(&dsi.errors_lock, flags);
607 static void dsi_vc_enable_bta_irq(int channel)
611 dsi_write_reg(DSI_VC_IRQSTATUS(channel), DSI_VC_IRQ_BTA);
613 l = dsi_read_reg(DSI_VC_IRQENABLE(channel));
615 dsi_write_reg(DSI_VC_IRQENABLE(channel), l);
618 static void dsi_vc_disable_bta_irq(int channel)
622 l = dsi_read_reg(DSI_VC_IRQENABLE(channel));
623 l &= ~DSI_VC_IRQ_BTA;
624 dsi_write_reg(DSI_VC_IRQENABLE(channel), l);
627 /* DSI func clock. this could also be DSI2_PLL_FCLK */
628 static inline void enable_clocks(bool enable)
631 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
633 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
636 /* source clock for DSI PLL. this could also be PCLKFREE */
637 static inline void dsi_enable_pll_clock(bool enable)
640 dss_clk_enable(DSS_CLK_FCK2);
642 dss_clk_disable(DSS_CLK_FCK2);
644 if (enable && dsi.pll_locked) {
645 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1)
646 DSSERR("cannot lock PLL when enabling clocks\n");
651 static void _dsi_print_reset_status(void)
658 /* A dummy read using the SCP interface to any DSIPHY register is
659 * required after DSIPHY reset to complete the reset of the DSI complex
661 l = dsi_read_reg(DSI_DSIPHY_CFG5);
663 printk(KERN_DEBUG "DSI resets: ");
665 l = dsi_read_reg(DSI_PLL_STATUS);
666 printk("PLL (%d) ", FLD_GET(l, 0, 0));
668 l = dsi_read_reg(DSI_COMPLEXIO_CFG1);
669 printk("CIO (%d) ", FLD_GET(l, 29, 29));
671 l = dsi_read_reg(DSI_DSIPHY_CFG5);
672 printk("PHY (%x, %d, %d, %d)\n",
679 #define _dsi_print_reset_status()
682 static inline int dsi_if_enable(bool enable)
684 DSSDBG("dsi_if_enable(%d)\n", enable);
686 enable = enable ? 1 : 0;
687 REG_FLD_MOD(DSI_CTRL, enable, 0, 0); /* IF_EN */
689 if (wait_for_bit_change(DSI_CTRL, 0, enable) != enable) {
690 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
697 unsigned long dsi_get_dsi1_pll_rate(void)
699 return dsi.current_cinfo.dsi1_pll_fclk;
702 static unsigned long dsi_get_dsi2_pll_rate(void)
704 return dsi.current_cinfo.dsi2_pll_fclk;
707 static unsigned long dsi_get_txbyteclkhs(void)
709 return dsi.current_cinfo.clkin4ddr / 16;
712 static unsigned long dsi_fclk_rate(void)
716 if (dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK) {
717 /* DSI FCLK source is DSS1_ALWON_FCK, which is dss1_fck */
718 r = dss_clk_get_rate(DSS_CLK_FCK1);
720 /* DSI FCLK source is DSI2_PLL_FCLK */
721 r = dsi_get_dsi2_pll_rate();
727 static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev)
729 unsigned long dsi_fclk;
731 unsigned long lp_clk;
733 lp_clk_div = dssdev->phy.dsi.div.lp_clk_div;
735 if (lp_clk_div == 0 || lp_clk_div > LP_DIV_MAX)
738 dsi_fclk = dsi_fclk_rate();
740 lp_clk = dsi_fclk / 2 / lp_clk_div;
742 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
743 dsi.current_cinfo.lp_clk = lp_clk;
744 dsi.current_cinfo.lp_clk_div = lp_clk_div;
746 REG_FLD_MOD(DSI_CLK_CTRL, lp_clk_div, 12, 0); /* LP_CLK_DIVISOR */
748 REG_FLD_MOD(DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0,
749 21, 21); /* LP_RX_SYNCHRO_ENABLE */
755 enum dsi_pll_power_state {
756 DSI_PLL_POWER_OFF = 0x0,
757 DSI_PLL_POWER_ON_HSCLK = 0x1,
758 DSI_PLL_POWER_ON_ALL = 0x2,
759 DSI_PLL_POWER_ON_DIV = 0x3,
762 static int dsi_pll_power(enum dsi_pll_power_state state)
766 REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30); /* PLL_PWR_CMD */
769 while (FLD_GET(dsi_read_reg(DSI_CLK_CTRL), 29, 28) != state) {
771 DSSERR("Failed to set DSI PLL power mode to %d\n",
781 /* calculate clock rates using dividers in cinfo */
782 static int dsi_calc_clock_rates(struct dsi_clock_info *cinfo)
784 if (cinfo->regn == 0 || cinfo->regn > REGN_MAX)
787 if (cinfo->regm == 0 || cinfo->regm > REGM_MAX)
790 if (cinfo->regm3 > REGM3_MAX)
793 if (cinfo->regm4 > REGM4_MAX)
796 if (cinfo->use_dss2_fck) {
797 cinfo->clkin = dss_clk_get_rate(DSS_CLK_FCK2);
798 /* XXX it is unclear if highfreq should be used
799 * with DSS2_FCK source also */
802 cinfo->clkin = dispc_pclk_rate();
804 if (cinfo->clkin < 32000000)
810 cinfo->fint = cinfo->clkin / (cinfo->regn * (cinfo->highfreq ? 2 : 1));
812 if (cinfo->fint > FINT_MAX || cinfo->fint < FINT_MIN)
815 cinfo->clkin4ddr = 2 * cinfo->regm * cinfo->fint;
817 if (cinfo->clkin4ddr > 1800 * 1000 * 1000)
820 if (cinfo->regm3 > 0)
821 cinfo->dsi1_pll_fclk = cinfo->clkin4ddr / cinfo->regm3;
823 cinfo->dsi1_pll_fclk = 0;
825 if (cinfo->regm4 > 0)
826 cinfo->dsi2_pll_fclk = cinfo->clkin4ddr / cinfo->regm4;
828 cinfo->dsi2_pll_fclk = 0;
833 int dsi_pll_calc_clock_div_pck(bool is_tft, unsigned long req_pck,
834 struct dsi_clock_info *dsi_cinfo,
835 struct dispc_clock_info *dispc_cinfo)
837 struct dsi_clock_info cur, best;
838 struct dispc_clock_info best_dispc;
841 unsigned long dss_clk_fck2;
843 dss_clk_fck2 = dss_clk_get_rate(DSS_CLK_FCK2);
845 if (req_pck == dsi.cache_req_pck &&
846 dsi.cache_cinfo.clkin == dss_clk_fck2) {
847 DSSDBG("DSI clock info found from cache\n");
848 *dsi_cinfo = dsi.cache_cinfo;
849 dispc_find_clk_divs(is_tft, req_pck, dsi_cinfo->dsi1_pll_fclk,
854 min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK;
856 if (min_fck_per_pck &&
857 req_pck * min_fck_per_pck > DISPC_MAX_FCK) {
858 DSSERR("Requested pixel clock not possible with the current "
859 "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning "
860 "the constraint off.\n");
864 DSSDBG("dsi_pll_calc\n");
867 memset(&best, 0, sizeof(best));
868 memset(&best_dispc, 0, sizeof(best_dispc));
870 memset(&cur, 0, sizeof(cur));
871 cur.clkin = dss_clk_fck2;
872 cur.use_dss2_fck = 1;
875 /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */
876 /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */
877 /* To reduce PLL lock time, keep Fint high (around 2 MHz) */
878 for (cur.regn = 1; cur.regn < REGN_MAX; ++cur.regn) {
879 if (cur.highfreq == 0)
880 cur.fint = cur.clkin / cur.regn;
882 cur.fint = cur.clkin / (2 * cur.regn);
884 if (cur.fint > FINT_MAX || cur.fint < FINT_MIN)
887 /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */
888 for (cur.regm = 1; cur.regm < REGM_MAX; ++cur.regm) {
891 a = 2 * cur.regm * (cur.clkin/1000);
892 b = cur.regn * (cur.highfreq + 1);
893 cur.clkin4ddr = a / b * 1000;
895 if (cur.clkin4ddr > 1800 * 1000 * 1000)
898 /* DSI1_PLL_FCLK(MHz) = DSIPHY(MHz) / regm3 < 173MHz */
899 for (cur.regm3 = 1; cur.regm3 < REGM3_MAX;
901 struct dispc_clock_info cur_dispc;
902 cur.dsi1_pll_fclk = cur.clkin4ddr / cur.regm3;
904 /* this will narrow down the search a bit,
905 * but still give pixclocks below what was
907 if (cur.dsi1_pll_fclk < req_pck)
910 if (cur.dsi1_pll_fclk > DISPC_MAX_FCK)
913 if (min_fck_per_pck &&
915 req_pck * min_fck_per_pck)
920 dispc_find_clk_divs(is_tft, req_pck,
924 if (abs(cur_dispc.pck - req_pck) <
925 abs(best_dispc.pck - req_pck)) {
927 best_dispc = cur_dispc;
929 if (cur_dispc.pck == req_pck)
937 if (min_fck_per_pck) {
938 DSSERR("Could not find suitable clock settings.\n"
939 "Turning FCK/PCK constraint off and"
945 DSSERR("Could not find suitable clock settings.\n");
950 /* DSI2_PLL_FCLK (regm4) is not used */
952 best.dsi2_pll_fclk = 0;
957 *dispc_cinfo = best_dispc;
959 dsi.cache_req_pck = req_pck;
960 dsi.cache_clk_freq = 0;
961 dsi.cache_cinfo = best;
966 int dsi_pll_set_clock_div(struct dsi_clock_info *cinfo)
974 dsi.current_cinfo.fint = cinfo->fint;
975 dsi.current_cinfo.clkin4ddr = cinfo->clkin4ddr;
976 dsi.current_cinfo.dsi1_pll_fclk = cinfo->dsi1_pll_fclk;
977 dsi.current_cinfo.dsi2_pll_fclk = cinfo->dsi2_pll_fclk;
979 dsi.current_cinfo.regn = cinfo->regn;
980 dsi.current_cinfo.regm = cinfo->regm;
981 dsi.current_cinfo.regm3 = cinfo->regm3;
982 dsi.current_cinfo.regm4 = cinfo->regm4;
984 DSSDBG("DSI Fint %ld\n", cinfo->fint);
986 DSSDBG("clkin (%s) rate %ld, highfreq %d\n",
987 cinfo->use_dss2_fck ? "dss2_fck" : "pclkfree",
991 /* DSIPHY == CLKIN4DDR */
992 DSSDBG("CLKIN4DDR = 2 * %d / %d * %lu / %d = %lu\n",
999 DSSDBG("Data rate on 1 DSI lane %ld Mbps\n",
1000 cinfo->clkin4ddr / 1000 / 1000 / 2);
1002 DSSDBG("Clock lane freq %ld Hz\n", cinfo->clkin4ddr / 4);
1004 DSSDBG("regm3 = %d, dsi1_pll_fclk = %lu\n",
1005 cinfo->regm3, cinfo->dsi1_pll_fclk);
1006 DSSDBG("regm4 = %d, dsi2_pll_fclk = %lu\n",
1007 cinfo->regm4, cinfo->dsi2_pll_fclk);
1009 REG_FLD_MOD(DSI_PLL_CONTROL, 0, 0, 0); /* DSI_PLL_AUTOMODE = manual */
1011 l = dsi_read_reg(DSI_PLL_CONFIGURATION1);
1012 l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */
1013 l = FLD_MOD(l, cinfo->regn - 1, 7, 1); /* DSI_PLL_REGN */
1014 l = FLD_MOD(l, cinfo->regm, 18, 8); /* DSI_PLL_REGM */
1015 l = FLD_MOD(l, cinfo->regm3 > 0 ? cinfo->regm3 - 1 : 0,
1016 22, 19); /* DSI_CLOCK_DIV */
1017 l = FLD_MOD(l, cinfo->regm4 > 0 ? cinfo->regm4 - 1 : 0,
1018 26, 23); /* DSIPROTO_CLOCK_DIV */
1019 dsi_write_reg(DSI_PLL_CONFIGURATION1, l);
1021 BUG_ON(cinfo->fint < 750000 || cinfo->fint > 2100000);
1022 if (cinfo->fint < 1000000)
1024 else if (cinfo->fint < 1250000)
1026 else if (cinfo->fint < 1500000)
1028 else if (cinfo->fint < 1750000)
1033 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1034 l = FLD_MOD(l, f, 4, 1); /* DSI_PLL_FREQSEL */
1035 l = FLD_MOD(l, cinfo->use_dss2_fck ? 0 : 1,
1036 11, 11); /* DSI_PLL_CLKSEL */
1037 l = FLD_MOD(l, cinfo->highfreq,
1038 12, 12); /* DSI_PLL_HIGHFREQ */
1039 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1040 l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */
1041 l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */
1042 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1044 REG_FLD_MOD(DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */
1046 if (wait_for_bit_change(DSI_PLL_GO, 0, 0) != 0) {
1047 DSSERR("dsi pll go bit not going down.\n");
1052 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) {
1053 DSSERR("cannot lock PLL\n");
1060 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1061 l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */
1062 l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */
1063 l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */
1064 l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */
1065 l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */
1066 l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */
1067 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1068 l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */
1069 l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */
1070 l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */
1071 l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */
1072 l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */
1073 l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */
1074 l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */
1075 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1077 DSSDBG("PLL config done\n");
1082 int dsi_pll_init(struct omap_dss_device *dssdev, bool enable_hsclk,
1086 enum dsi_pll_power_state pwstate;
1088 DSSDBG("PLL init\n");
1091 dsi_enable_pll_clock(1);
1093 r = regulator_enable(dsi.vdds_dsi_reg);
1097 /* XXX PLL does not come out of reset without this... */
1098 dispc_pck_free_enable(1);
1100 if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) {
1101 DSSERR("PLL not coming out of reset.\n");
1106 /* XXX ... but if left on, we get problems when planes do not
1107 * fill the whole display. No idea about this */
1108 dispc_pck_free_enable(0);
1110 if (enable_hsclk && enable_hsdiv)
1111 pwstate = DSI_PLL_POWER_ON_ALL;
1112 else if (enable_hsclk)
1113 pwstate = DSI_PLL_POWER_ON_HSCLK;
1114 else if (enable_hsdiv)
1115 pwstate = DSI_PLL_POWER_ON_DIV;
1117 pwstate = DSI_PLL_POWER_OFF;
1119 r = dsi_pll_power(pwstate);
1124 DSSDBG("PLL init done\n");
1128 regulator_disable(dsi.vdds_dsi_reg);
1131 dsi_enable_pll_clock(0);
1135 void dsi_pll_uninit(void)
1138 dsi_enable_pll_clock(0);
1141 dsi_pll_power(DSI_PLL_POWER_OFF);
1142 regulator_disable(dsi.vdds_dsi_reg);
1143 DSSDBG("PLL uninit done\n");
1146 void dsi_dump_clocks(struct seq_file *s)
1149 struct dsi_clock_info *cinfo = &dsi.current_cinfo;
1153 clksel = REG_GET(DSI_PLL_CONFIGURATION2, 11, 11);
1155 seq_printf(s, "- DSI PLL -\n");
1157 seq_printf(s, "dsi pll source = %s\n",
1159 "dss2_alwon_fclk" : "pclkfree");
1161 seq_printf(s, "Fint\t\t%-16luregn %u\n", cinfo->fint, cinfo->regn);
1163 seq_printf(s, "CLKIN4DDR\t%-16luregm %u\n",
1164 cinfo->clkin4ddr, cinfo->regm);
1166 seq_printf(s, "dsi1_pll_fck\t%-16luregm3 %u\t(%s)\n",
1167 cinfo->dsi1_pll_fclk,
1169 dss_get_dispc_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
1172 seq_printf(s, "dsi2_pll_fck\t%-16luregm4 %u\t(%s)\n",
1173 cinfo->dsi2_pll_fclk,
1175 dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
1178 seq_printf(s, "- DSI -\n");
1180 seq_printf(s, "dsi fclk source = %s\n",
1181 dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
1182 "dss1_alwon_fclk" : "dsi2_pll_fclk");
1184 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate());
1186 seq_printf(s, "DDR_CLK\t\t%lu\n",
1187 cinfo->clkin4ddr / 4);
1189 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs());
1191 seq_printf(s, "LP_CLK\t\t%lu\n", cinfo->lp_clk);
1193 seq_printf(s, "VP_CLK\t\t%lu\n"
1201 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
1202 void dsi_dump_irqs(struct seq_file *s)
1204 unsigned long flags;
1205 struct dsi_irq_stats stats;
1207 spin_lock_irqsave(&dsi.irq_stats_lock, flags);
1209 stats = dsi.irq_stats;
1210 memset(&dsi.irq_stats, 0, sizeof(dsi.irq_stats));
1211 dsi.irq_stats.last_reset = jiffies;
1213 spin_unlock_irqrestore(&dsi.irq_stats_lock, flags);
1215 seq_printf(s, "period %u ms\n",
1216 jiffies_to_msecs(jiffies - stats.last_reset));
1218 seq_printf(s, "irqs %d\n", stats.irq_count);
1220 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1222 seq_printf(s, "-- DSI interrupts --\n");
1238 PIS(LDO_POWER_GOOD);
1243 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1244 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1245 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1246 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1247 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1249 seq_printf(s, "-- VC interrupts --\n");
1258 PIS(PP_BUSY_CHANGE);
1262 seq_printf(s, "%-20s %10d\n", #x, \
1263 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1265 seq_printf(s, "-- CIO interrupts --\n");
1278 PIS(ERRCONTENTIONLP0_1);
1279 PIS(ERRCONTENTIONLP1_1);
1280 PIS(ERRCONTENTIONLP0_2);
1281 PIS(ERRCONTENTIONLP1_2);
1282 PIS(ERRCONTENTIONLP0_3);
1283 PIS(ERRCONTENTIONLP1_3);
1284 PIS(ULPSACTIVENOT_ALL0);
1285 PIS(ULPSACTIVENOT_ALL1);
1290 void dsi_dump_regs(struct seq_file *s)
1292 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r))
1294 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
1296 DUMPREG(DSI_REVISION);
1297 DUMPREG(DSI_SYSCONFIG);
1298 DUMPREG(DSI_SYSSTATUS);
1299 DUMPREG(DSI_IRQSTATUS);
1300 DUMPREG(DSI_IRQENABLE);
1302 DUMPREG(DSI_COMPLEXIO_CFG1);
1303 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1304 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1305 DUMPREG(DSI_CLK_CTRL);
1306 DUMPREG(DSI_TIMING1);
1307 DUMPREG(DSI_TIMING2);
1308 DUMPREG(DSI_VM_TIMING1);
1309 DUMPREG(DSI_VM_TIMING2);
1310 DUMPREG(DSI_VM_TIMING3);
1311 DUMPREG(DSI_CLK_TIMING);
1312 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1313 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1314 DUMPREG(DSI_COMPLEXIO_CFG2);
1315 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1316 DUMPREG(DSI_VM_TIMING4);
1317 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1318 DUMPREG(DSI_VM_TIMING5);
1319 DUMPREG(DSI_VM_TIMING6);
1320 DUMPREG(DSI_VM_TIMING7);
1321 DUMPREG(DSI_STOPCLK_TIMING);
1323 DUMPREG(DSI_VC_CTRL(0));
1324 DUMPREG(DSI_VC_TE(0));
1325 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1326 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1327 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1328 DUMPREG(DSI_VC_IRQSTATUS(0));
1329 DUMPREG(DSI_VC_IRQENABLE(0));
1331 DUMPREG(DSI_VC_CTRL(1));
1332 DUMPREG(DSI_VC_TE(1));
1333 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1334 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1335 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1336 DUMPREG(DSI_VC_IRQSTATUS(1));
1337 DUMPREG(DSI_VC_IRQENABLE(1));
1339 DUMPREG(DSI_VC_CTRL(2));
1340 DUMPREG(DSI_VC_TE(2));
1341 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1342 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1343 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1344 DUMPREG(DSI_VC_IRQSTATUS(2));
1345 DUMPREG(DSI_VC_IRQENABLE(2));
1347 DUMPREG(DSI_VC_CTRL(3));
1348 DUMPREG(DSI_VC_TE(3));
1349 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1350 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1351 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1352 DUMPREG(DSI_VC_IRQSTATUS(3));
1353 DUMPREG(DSI_VC_IRQENABLE(3));
1355 DUMPREG(DSI_DSIPHY_CFG0);
1356 DUMPREG(DSI_DSIPHY_CFG1);
1357 DUMPREG(DSI_DSIPHY_CFG2);
1358 DUMPREG(DSI_DSIPHY_CFG5);
1360 DUMPREG(DSI_PLL_CONTROL);
1361 DUMPREG(DSI_PLL_STATUS);
1362 DUMPREG(DSI_PLL_GO);
1363 DUMPREG(DSI_PLL_CONFIGURATION1);
1364 DUMPREG(DSI_PLL_CONFIGURATION2);
1366 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
1370 enum dsi_complexio_power_state {
1371 DSI_COMPLEXIO_POWER_OFF = 0x0,
1372 DSI_COMPLEXIO_POWER_ON = 0x1,
1373 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1376 static int dsi_complexio_power(enum dsi_complexio_power_state state)
1381 REG_FLD_MOD(DSI_COMPLEXIO_CFG1, state, 28, 27);
1384 while (FLD_GET(dsi_read_reg(DSI_COMPLEXIO_CFG1), 26, 25) != state) {
1386 DSSERR("failed to set complexio power state to "
1396 static void dsi_complexio_config(struct omap_dss_device *dssdev)
1400 int clk_lane = dssdev->phy.dsi.clk_lane;
1401 int data1_lane = dssdev->phy.dsi.data1_lane;
1402 int data2_lane = dssdev->phy.dsi.data2_lane;
1403 int clk_pol = dssdev->phy.dsi.clk_pol;
1404 int data1_pol = dssdev->phy.dsi.data1_pol;
1405 int data2_pol = dssdev->phy.dsi.data2_pol;
1407 r = dsi_read_reg(DSI_COMPLEXIO_CFG1);
1408 r = FLD_MOD(r, clk_lane, 2, 0);
1409 r = FLD_MOD(r, clk_pol, 3, 3);
1410 r = FLD_MOD(r, data1_lane, 6, 4);
1411 r = FLD_MOD(r, data1_pol, 7, 7);
1412 r = FLD_MOD(r, data2_lane, 10, 8);
1413 r = FLD_MOD(r, data2_pol, 11, 11);
1414 dsi_write_reg(DSI_COMPLEXIO_CFG1, r);
1416 /* The configuration of the DSI complex I/O (number of data lanes,
1417 position, differential order) should not be changed while
1418 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for
1419 the hardware to take into account a new configuration of the complex
1420 I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to
1421 follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1,
1422 then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set
1423 DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the
1424 DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the
1425 DSI complex I/O configuration is unknown. */
1428 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1429 REG_FLD_MOD(DSI_CTRL, 0, 0, 0);
1430 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20);
1431 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1435 static inline unsigned ns2ddr(unsigned ns)
1437 /* convert time in ns to ddr ticks, rounding up */
1438 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1439 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1442 static inline unsigned ddr2ns(unsigned ddr)
1444 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1445 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1448 static void dsi_complexio_timings(void)
1451 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1452 u32 tlpx_half, tclk_trail, tclk_zero;
1455 /* calculate timings */
1457 /* 1 * DDR_CLK = 2 * UI */
1459 /* min 40ns + 4*UI max 85ns + 6*UI */
1460 ths_prepare = ns2ddr(70) + 2;
1462 /* min 145ns + 10*UI */
1463 ths_prepare_ths_zero = ns2ddr(175) + 2;
1465 /* min max(8*UI, 60ns+4*UI) */
1466 ths_trail = ns2ddr(60) + 5;
1469 ths_exit = ns2ddr(145);
1472 tlpx_half = ns2ddr(25);
1475 tclk_trail = ns2ddr(60) + 2;
1477 /* min 38ns, max 95ns */
1478 tclk_prepare = ns2ddr(65);
1480 /* min tclk-prepare + tclk-zero = 300ns */
1481 tclk_zero = ns2ddr(260);
1483 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1484 ths_prepare, ddr2ns(ths_prepare),
1485 ths_prepare_ths_zero, ddr2ns(ths_prepare_ths_zero));
1486 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1487 ths_trail, ddr2ns(ths_trail),
1488 ths_exit, ddr2ns(ths_exit));
1490 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1491 "tclk_zero %u (%uns)\n",
1492 tlpx_half, ddr2ns(tlpx_half),
1493 tclk_trail, ddr2ns(tclk_trail),
1494 tclk_zero, ddr2ns(tclk_zero));
1495 DSSDBG("tclk_prepare %u (%uns)\n",
1496 tclk_prepare, ddr2ns(tclk_prepare));
1498 /* program timings */
1500 r = dsi_read_reg(DSI_DSIPHY_CFG0);
1501 r = FLD_MOD(r, ths_prepare, 31, 24);
1502 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1503 r = FLD_MOD(r, ths_trail, 15, 8);
1504 r = FLD_MOD(r, ths_exit, 7, 0);
1505 dsi_write_reg(DSI_DSIPHY_CFG0, r);
1507 r = dsi_read_reg(DSI_DSIPHY_CFG1);
1508 r = FLD_MOD(r, tlpx_half, 22, 16);
1509 r = FLD_MOD(r, tclk_trail, 15, 8);
1510 r = FLD_MOD(r, tclk_zero, 7, 0);
1511 dsi_write_reg(DSI_DSIPHY_CFG1, r);
1513 r = dsi_read_reg(DSI_DSIPHY_CFG2);
1514 r = FLD_MOD(r, tclk_prepare, 7, 0);
1515 dsi_write_reg(DSI_DSIPHY_CFG2, r);
1519 static int dsi_complexio_init(struct omap_dss_device *dssdev)
1523 DSSDBG("dsi_complexio_init\n");
1525 /* CIO_CLK_ICG, enable L3 clk to CIO */
1526 REG_FLD_MOD(DSI_CLK_CTRL, 1, 14, 14);
1528 /* A dummy read using the SCP interface to any DSIPHY register is
1529 * required after DSIPHY reset to complete the reset of the DSI complex
1531 dsi_read_reg(DSI_DSIPHY_CFG5);
1533 if (wait_for_bit_change(DSI_DSIPHY_CFG5, 30, 1) != 1) {
1534 DSSERR("ComplexIO PHY not coming out of reset.\n");
1539 dsi_complexio_config(dssdev);
1541 r = dsi_complexio_power(DSI_COMPLEXIO_POWER_ON);
1546 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
1547 DSSERR("ComplexIO not coming out of reset.\n");
1552 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 21, 1) != 1) {
1553 DSSERR("ComplexIO LDO power down.\n");
1558 dsi_complexio_timings();
1561 The configuration of the DSI complex I/O (number of data lanes,
1562 position, differential order) should not be changed while
1563 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. For the
1564 hardware to recognize a new configuration of the complex I/O (done
1565 in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to follow
1566 this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1, next
1567 reset the DSS.DSI_CTRL[0] IF_EN to 0, then set DSS.DSI_CLK_CTRL[20]
1568 LP_CLK_ENABLE to 1, and finally, set again the DSS.DSI_CTRL[0] IF_EN
1569 bit to 1. If the sequence is not followed, the DSi complex I/O
1570 configuration is undetermined.
1574 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
1578 DSSDBG("CIO init done\n");
1583 static void dsi_complexio_uninit(void)
1585 dsi_complexio_power(DSI_COMPLEXIO_POWER_OFF);
1588 static int _dsi_wait_reset(void)
1592 while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) {
1594 DSSERR("soft reset failed\n");
1603 static int _dsi_reset(void)
1606 REG_FLD_MOD(DSI_SYSCONFIG, 1, 1, 1);
1607 return _dsi_wait_reset();
1610 static void dsi_reset_tx_fifo(int channel)
1615 /* set fifosize of the channel to 0, then return the old size */
1616 l = dsi_read_reg(DSI_TX_FIFO_VC_SIZE);
1618 mask = FLD_MASK((8 * channel) + 7, (8 * channel) + 4);
1619 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, l & ~mask);
1621 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, l);
1624 static void dsi_config_tx_fifo(enum fifo_size size1, enum fifo_size size2,
1625 enum fifo_size size3, enum fifo_size size4)
1631 dsi.vc[0].fifo_size = size1;
1632 dsi.vc[1].fifo_size = size2;
1633 dsi.vc[2].fifo_size = size3;
1634 dsi.vc[3].fifo_size = size4;
1636 for (i = 0; i < 4; i++) {
1638 int size = dsi.vc[i].fifo_size;
1640 if (add + size > 4) {
1641 DSSERR("Illegal FIFO configuration\n");
1645 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
1647 /*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
1651 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, r);
1654 static void dsi_config_rx_fifo(enum fifo_size size1, enum fifo_size size2,
1655 enum fifo_size size3, enum fifo_size size4)
1661 dsi.vc[0].fifo_size = size1;
1662 dsi.vc[1].fifo_size = size2;
1663 dsi.vc[2].fifo_size = size3;
1664 dsi.vc[3].fifo_size = size4;
1666 for (i = 0; i < 4; i++) {
1668 int size = dsi.vc[i].fifo_size;
1670 if (add + size > 4) {
1671 DSSERR("Illegal FIFO configuration\n");
1675 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
1677 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
1681 dsi_write_reg(DSI_RX_FIFO_VC_SIZE, r);
1684 static int dsi_force_tx_stop_mode_io(void)
1688 r = dsi_read_reg(DSI_TIMING1);
1689 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
1690 dsi_write_reg(DSI_TIMING1, r);
1692 if (wait_for_bit_change(DSI_TIMING1, 15, 0) != 0) {
1693 DSSERR("TX_STOP bit not going down\n");
1700 static int dsi_vc_enable(int channel, bool enable)
1702 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
1705 enable = enable ? 1 : 0;
1707 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 0, 0);
1709 if (wait_for_bit_change(DSI_VC_CTRL(channel), 0, enable) != enable) {
1710 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
1717 static void dsi_vc_initial_config(int channel)
1721 DSSDBGF("%d", channel);
1723 r = dsi_read_reg(DSI_VC_CTRL(channel));
1725 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
1726 DSSERR("VC(%d) busy when trying to configure it!\n",
1729 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
1730 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
1731 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
1732 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
1733 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
1734 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
1735 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
1737 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
1738 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
1740 dsi_write_reg(DSI_VC_CTRL(channel), r);
1742 dsi.vc[channel].mode = DSI_VC_MODE_L4;
1745 static void dsi_vc_config_l4(int channel)
1747 if (dsi.vc[channel].mode == DSI_VC_MODE_L4)
1750 DSSDBGF("%d", channel);
1752 dsi_vc_enable(channel, 0);
1754 if (REG_GET(DSI_VC_CTRL(channel), 15, 15)) /* VC_BUSY */
1755 DSSERR("vc(%d) busy when trying to config for L4\n", channel);
1757 REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */
1759 dsi_vc_enable(channel, 1);
1761 dsi.vc[channel].mode = DSI_VC_MODE_L4;
1764 static void dsi_vc_config_vp(int channel)
1766 if (dsi.vc[channel].mode == DSI_VC_MODE_VP)
1769 DSSDBGF("%d", channel);
1771 dsi_vc_enable(channel, 0);
1773 if (REG_GET(DSI_VC_CTRL(channel), 15, 15)) /* VC_BUSY */
1774 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
1776 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 1, 1); /* SOURCE, 1 = video port */
1778 dsi_vc_enable(channel, 1);
1780 dsi.vc[channel].mode = DSI_VC_MODE_VP;
1784 void omapdss_dsi_vc_enable_hs(int channel, bool enable)
1786 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
1788 WARN_ON(!dsi_bus_is_locked());
1790 dsi_vc_enable(channel, 0);
1793 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 9, 9);
1795 dsi_vc_enable(channel, 1);
1798 dsi_force_tx_stop_mode_io();
1800 EXPORT_SYMBOL(omapdss_dsi_vc_enable_hs);
1802 static void dsi_vc_flush_long_data(int channel)
1804 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
1806 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
1807 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
1811 (val >> 24) & 0xff);
1815 static void dsi_show_rx_ack_with_err(u16 err)
1817 DSSERR("\tACK with ERROR (%#x):\n", err);
1819 DSSERR("\t\tSoT Error\n");
1821 DSSERR("\t\tSoT Sync Error\n");
1823 DSSERR("\t\tEoT Sync Error\n");
1825 DSSERR("\t\tEscape Mode Entry Command Error\n");
1827 DSSERR("\t\tLP Transmit Sync Error\n");
1829 DSSERR("\t\tHS Receive Timeout Error\n");
1831 DSSERR("\t\tFalse Control Error\n");
1833 DSSERR("\t\t(reserved7)\n");
1835 DSSERR("\t\tECC Error, single-bit (corrected)\n");
1837 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
1838 if (err & (1 << 10))
1839 DSSERR("\t\tChecksum Error\n");
1840 if (err & (1 << 11))
1841 DSSERR("\t\tData type not recognized\n");
1842 if (err & (1 << 12))
1843 DSSERR("\t\tInvalid VC ID\n");
1844 if (err & (1 << 13))
1845 DSSERR("\t\tInvalid Transmission Length\n");
1846 if (err & (1 << 14))
1847 DSSERR("\t\t(reserved14)\n");
1848 if (err & (1 << 15))
1849 DSSERR("\t\tDSI Protocol Violation\n");
1852 static u16 dsi_vc_flush_receive_data(int channel)
1854 /* RX_FIFO_NOT_EMPTY */
1855 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
1858 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
1859 DSSERR("\trawval %#08x\n", val);
1860 dt = FLD_GET(val, 5, 0);
1861 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
1862 u16 err = FLD_GET(val, 23, 8);
1863 dsi_show_rx_ack_with_err(err);
1864 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
1865 DSSERR("\tDCS short response, 1 byte: %#x\n",
1866 FLD_GET(val, 23, 8));
1867 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
1868 DSSERR("\tDCS short response, 2 byte: %#x\n",
1869 FLD_GET(val, 23, 8));
1870 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
1871 DSSERR("\tDCS long response, len %d\n",
1872 FLD_GET(val, 23, 8));
1873 dsi_vc_flush_long_data(channel);
1875 DSSERR("\tunknown datatype 0x%02x\n", dt);
1881 static int dsi_vc_send_bta(int channel)
1883 if (dsi.debug_write || dsi.debug_read)
1884 DSSDBG("dsi_vc_send_bta %d\n", channel);
1886 WARN_ON(!dsi_bus_is_locked());
1888 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
1889 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
1890 dsi_vc_flush_receive_data(channel);
1893 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
1898 int dsi_vc_send_bta_sync(int channel)
1903 INIT_COMPLETION(dsi.bta_completion);
1905 dsi_vc_enable_bta_irq(channel);
1907 r = dsi_vc_send_bta(channel);
1911 if (wait_for_completion_timeout(&dsi.bta_completion,
1912 msecs_to_jiffies(500)) == 0) {
1913 DSSERR("Failed to receive BTA\n");
1918 err = dsi_get_errors();
1920 DSSERR("Error while sending BTA: %x\n", err);
1925 dsi_vc_disable_bta_irq(channel);
1929 EXPORT_SYMBOL(dsi_vc_send_bta_sync);
1931 static inline void dsi_vc_write_long_header(int channel, u8 data_type,
1937 WARN_ON(!dsi_bus_is_locked());
1939 data_id = data_type | channel << 6;
1941 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
1942 FLD_VAL(ecc, 31, 24);
1944 dsi_write_reg(DSI_VC_LONG_PACKET_HEADER(channel), val);
1947 static inline void dsi_vc_write_long_payload(int channel,
1948 u8 b1, u8 b2, u8 b3, u8 b4)
1952 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
1954 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
1955 b1, b2, b3, b4, val); */
1957 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
1960 static int dsi_vc_send_long(int channel, u8 data_type, u8 *data, u16 len,
1969 if (dsi.debug_write)
1970 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
1973 if (dsi.vc[channel].fifo_size * 32 * 4 < len + 4) {
1974 DSSERR("unable to send long packet: packet too long.\n");
1978 dsi_vc_config_l4(channel);
1980 dsi_vc_write_long_header(channel, data_type, len, ecc);
1983 for (i = 0; i < len >> 2; i++) {
1984 if (dsi.debug_write)
1985 DSSDBG("\tsending full packet %d\n", i);
1992 dsi_vc_write_long_payload(channel, b1, b2, b3, b4);
1997 b1 = 0; b2 = 0; b3 = 0;
1999 if (dsi.debug_write)
2000 DSSDBG("\tsending remainder bytes %d\n", i);
2017 dsi_vc_write_long_payload(channel, b1, b2, b3, 0);
2023 static int dsi_vc_send_short(int channel, u8 data_type, u16 data, u8 ecc)
2028 WARN_ON(!dsi_bus_is_locked());
2030 if (dsi.debug_write)
2031 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2033 data_type, data & 0xff, (data >> 8) & 0xff);
2035 dsi_vc_config_l4(channel);
2037 if (FLD_GET(dsi_read_reg(DSI_VC_CTRL(channel)), 16, 16)) {
2038 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2042 data_id = data_type | channel << 6;
2044 r = (data_id << 0) | (data << 8) | (ecc << 24);
2046 dsi_write_reg(DSI_VC_SHORT_PACKET_HEADER(channel), r);
2051 int dsi_vc_send_null(int channel)
2053 u8 nullpkg[] = {0, 0, 0, 0};
2054 return dsi_vc_send_long(channel, DSI_DT_NULL_PACKET, nullpkg, 4, 0);
2056 EXPORT_SYMBOL(dsi_vc_send_null);
2058 int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len)
2065 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_0,
2067 } else if (len == 2) {
2068 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_1,
2069 data[0] | (data[1] << 8), 0);
2071 /* 0x39 = DCS Long Write */
2072 r = dsi_vc_send_long(channel, DSI_DT_DCS_LONG_WRITE,
2078 EXPORT_SYMBOL(dsi_vc_dcs_write_nosync);
2080 int dsi_vc_dcs_write(int channel, u8 *data, int len)
2084 r = dsi_vc_dcs_write_nosync(channel, data, len);
2088 r = dsi_vc_send_bta_sync(channel);
2092 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2093 DSSERR("rx fifo not empty after write, dumping data:\n");
2094 dsi_vc_flush_receive_data(channel);
2101 DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
2102 channel, data[0], len);
2105 EXPORT_SYMBOL(dsi_vc_dcs_write);
2107 int dsi_vc_dcs_write_0(int channel, u8 dcs_cmd)
2109 return dsi_vc_dcs_write(channel, &dcs_cmd, 1);
2111 EXPORT_SYMBOL(dsi_vc_dcs_write_0);
2113 int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param)
2118 return dsi_vc_dcs_write(channel, buf, 2);
2120 EXPORT_SYMBOL(dsi_vc_dcs_write_1);
2122 int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
2129 DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %x)\n", channel, dcs_cmd);
2131 r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
2135 r = dsi_vc_send_bta_sync(channel);
2139 /* RX_FIFO_NOT_EMPTY */
2140 if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
2141 DSSERR("RX fifo empty when trying to read.\n");
2146 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2148 DSSDBG("\theader: %08x\n", val);
2149 dt = FLD_GET(val, 5, 0);
2150 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2151 u16 err = FLD_GET(val, 23, 8);
2152 dsi_show_rx_ack_with_err(err);
2156 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2157 u8 data = FLD_GET(val, 15, 8);
2159 DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
2169 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2170 u16 data = FLD_GET(val, 23, 8);
2172 DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
2179 buf[0] = data & 0xff;
2180 buf[1] = (data >> 8) & 0xff;
2183 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2185 int len = FLD_GET(val, 23, 8);
2187 DSSDBG("\tDCS long response, len %d\n", len);
2194 /* two byte checksum ends the packet, not included in len */
2195 for (w = 0; w < len + 2;) {
2197 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2199 DSSDBG("\t\t%02x %02x %02x %02x\n",
2203 (val >> 24) & 0xff);
2205 for (b = 0; b < 4; ++b) {
2207 buf[w] = (val >> (b * 8)) & 0xff;
2208 /* we discard the 2 byte checksum */
2215 DSSERR("\tunknown datatype 0x%02x\n", dt);
2222 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
2227 EXPORT_SYMBOL(dsi_vc_dcs_read);
2229 int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
2233 r = dsi_vc_dcs_read(channel, dcs_cmd, data, 1);
2243 EXPORT_SYMBOL(dsi_vc_dcs_read_1);
2245 int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u8 *data1, u8 *data2)
2250 r = dsi_vc_dcs_read(channel, dcs_cmd, buf, 2);
2263 EXPORT_SYMBOL(dsi_vc_dcs_read_2);
2265 int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
2268 r = dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
2274 r = dsi_vc_send_bta_sync(channel);
2278 EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
2280 static void dsi_set_lp_rx_timeout(unsigned ticks, bool x4, bool x16)
2283 unsigned long total_ticks;
2286 BUG_ON(ticks > 0x1fff);
2288 /* ticks in DSI_FCK */
2289 fck = dsi_fclk_rate();
2291 r = dsi_read_reg(DSI_TIMING2);
2292 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
2293 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
2294 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
2295 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
2296 dsi_write_reg(DSI_TIMING2, r);
2298 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2300 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2302 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2303 (total_ticks * 1000) / (fck / 1000 / 1000));
2306 static void dsi_set_ta_timeout(unsigned ticks, bool x8, bool x16)
2309 unsigned long total_ticks;
2312 BUG_ON(ticks > 0x1fff);
2314 /* ticks in DSI_FCK */
2315 fck = dsi_fclk_rate();
2317 r = dsi_read_reg(DSI_TIMING1);
2318 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
2319 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
2320 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
2321 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
2322 dsi_write_reg(DSI_TIMING1, r);
2324 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
2326 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
2328 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
2329 (total_ticks * 1000) / (fck / 1000 / 1000));
2332 static void dsi_set_stop_state_counter(unsigned ticks, bool x4, bool x16)
2335 unsigned long total_ticks;
2338 BUG_ON(ticks > 0x1fff);
2340 /* ticks in DSI_FCK */
2341 fck = dsi_fclk_rate();
2343 r = dsi_read_reg(DSI_TIMING1);
2344 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2345 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
2346 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
2347 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
2348 dsi_write_reg(DSI_TIMING1, r);
2350 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2352 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
2354 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2355 (total_ticks * 1000) / (fck / 1000 / 1000));
2358 static void dsi_set_hs_tx_timeout(unsigned ticks, bool x4, bool x16)
2361 unsigned long total_ticks;
2364 BUG_ON(ticks > 0x1fff);
2366 /* ticks in TxByteClkHS */
2367 fck = dsi_get_txbyteclkhs();
2369 r = dsi_read_reg(DSI_TIMING2);
2370 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
2371 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
2372 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
2373 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
2374 dsi_write_reg(DSI_TIMING2, r);
2376 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2378 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2380 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2381 (total_ticks * 1000) / (fck / 1000 / 1000));
2383 static int dsi_proto_config(struct omap_dss_device *dssdev)
2388 dsi_config_tx_fifo(DSI_FIFO_SIZE_32,
2393 dsi_config_rx_fifo(DSI_FIFO_SIZE_32,
2398 /* XXX what values for the timeouts? */
2399 dsi_set_stop_state_counter(0x1000, false, false);
2400 dsi_set_ta_timeout(0x1fff, true, true);
2401 dsi_set_lp_rx_timeout(0x1fff, true, true);
2402 dsi_set_hs_tx_timeout(0x1fff, true, true);
2404 switch (dssdev->ctrl.pixel_size) {
2418 r = dsi_read_reg(DSI_CTRL);
2419 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
2420 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
2421 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
2422 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
2423 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
2424 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
2425 r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */
2426 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
2427 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
2428 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
2429 r = FLD_MOD(r, 0, 25, 25); /* DCS_CMD_CODE, 1=start, 0=continue */
2431 dsi_write_reg(DSI_CTRL, r);
2433 dsi_vc_initial_config(0);
2434 dsi_vc_initial_config(1);
2435 dsi_vc_initial_config(2);
2436 dsi_vc_initial_config(3);
2441 static void dsi_proto_timings(struct omap_dss_device *dssdev)
2443 unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail;
2444 unsigned tclk_pre, tclk_post;
2445 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
2446 unsigned ths_trail, ths_exit;
2447 unsigned ddr_clk_pre, ddr_clk_post;
2448 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
2452 r = dsi_read_reg(DSI_DSIPHY_CFG0);
2453 ths_prepare = FLD_GET(r, 31, 24);
2454 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
2455 ths_zero = ths_prepare_ths_zero - ths_prepare;
2456 ths_trail = FLD_GET(r, 15, 8);
2457 ths_exit = FLD_GET(r, 7, 0);
2459 r = dsi_read_reg(DSI_DSIPHY_CFG1);
2460 tlpx = FLD_GET(r, 22, 16) * 2;
2461 tclk_trail = FLD_GET(r, 15, 8);
2462 tclk_zero = FLD_GET(r, 7, 0);
2464 r = dsi_read_reg(DSI_DSIPHY_CFG2);
2465 tclk_prepare = FLD_GET(r, 7, 0);
2469 /* min 60ns + 52*UI */
2470 tclk_post = ns2ddr(60) + 26;
2472 /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */
2473 if (dssdev->phy.dsi.data1_lane != 0 &&
2474 dssdev->phy.dsi.data2_lane != 0)
2479 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
2481 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
2483 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
2484 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
2486 r = dsi_read_reg(DSI_CLK_TIMING);
2487 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
2488 r = FLD_MOD(r, ddr_clk_post, 7, 0);
2489 dsi_write_reg(DSI_CLK_TIMING, r);
2491 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
2495 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
2496 DIV_ROUND_UP(ths_prepare, 4) +
2497 DIV_ROUND_UP(ths_zero + 3, 4);
2499 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
2501 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
2502 FLD_VAL(exit_hs_mode_lat, 15, 0);
2503 dsi_write_reg(DSI_VM_TIMING7, r);
2505 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
2506 enter_hs_mode_lat, exit_hs_mode_lat);
2510 #define DSI_DECL_VARS \
2511 int __dsi_cb = 0; u32 __dsi_cv = 0;
2513 #define DSI_FLUSH(ch) \
2514 if (__dsi_cb > 0) { \
2515 /*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \
2516 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \
2517 __dsi_cb = __dsi_cv = 0; \
2520 #define DSI_PUSH(ch, data) \
2522 __dsi_cv |= (data) << (__dsi_cb * 8); \
2523 /*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \
2524 if (++__dsi_cb > 3) \
2528 static int dsi_update_screen_l4(struct omap_dss_device *dssdev,
2529 int x, int y, int w, int h)
2531 /* Note: supports only 24bit colors in 32bit container */
2533 int fifo_stalls = 0;
2534 int max_dsi_packet_size;
2535 int max_data_per_packet;
2536 int max_pixels_per_packet;
2538 int bytespp = dssdev->ctrl.pixel_size / 8;
2544 struct omap_overlay *ovl;
2548 DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n",
2551 ovl = dssdev->manager->overlays[0];
2553 if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U)
2556 if (dssdev->ctrl.pixel_size != 24)
2559 scr_width = ovl->info.screen_width;
2560 data = ovl->info.vaddr;
2562 start_offset = scr_width * y + x;
2563 horiz_inc = scr_width - w;
2566 /* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes
2569 /* When using CPU, max long packet size is TX buffer size */
2570 max_dsi_packet_size = dsi.vc[0].fifo_size * 32 * 4;
2572 /* we seem to get better perf if we divide the tx fifo to half,
2573 and while the other half is being sent, we fill the other half
2574 max_dsi_packet_size /= 2; */
2576 max_data_per_packet = max_dsi_packet_size - 4 - 1;
2578 max_pixels_per_packet = max_data_per_packet / bytespp;
2580 DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet);
2582 pixels_left = w * h;
2584 DSSDBG("total pixels %d\n", pixels_left);
2586 data += start_offset;
2588 while (pixels_left > 0) {
2589 /* 0x2c = write_memory_start */
2590 /* 0x3c = write_memory_continue */
2591 u8 dcs_cmd = first ? 0x2c : 0x3c;
2597 /* using fifo not empty */
2598 /* TX_FIFO_NOT_EMPTY */
2599 while (FLD_GET(dsi_read_reg(DSI_VC_CTRL(0)), 5, 5)) {
2601 if (fifo_stalls > 0xfffff) {
2602 DSSERR("fifo stalls overflow, pixels left %d\n",
2610 /* using fifo emptiness */
2611 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 <
2612 max_dsi_packet_size) {
2614 if (fifo_stalls > 0xfffff) {
2615 DSSERR("fifo stalls overflow, pixels left %d\n",
2622 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 == 0) {
2624 if (fifo_stalls > 0xfffff) {
2625 DSSERR("fifo stalls overflow, pixels left %d\n",
2632 pixels = min(max_pixels_per_packet, pixels_left);
2634 pixels_left -= pixels;
2636 dsi_vc_write_long_header(0, DSI_DT_DCS_LONG_WRITE,
2637 1 + pixels * bytespp, 0);
2639 DSI_PUSH(0, dcs_cmd);
2641 while (pixels-- > 0) {
2642 u32 pix = __raw_readl(data++);
2644 DSI_PUSH(0, (pix >> 16) & 0xff);
2645 DSI_PUSH(0, (pix >> 8) & 0xff);
2646 DSI_PUSH(0, (pix >> 0) & 0xff);
2649 if (current_x == x+w) {
2661 static void dsi_update_screen_dispc(struct omap_dss_device *dssdev,
2662 u16 x, u16 y, u16 w, u16 h)
2668 unsigned packet_payload;
2669 unsigned packet_len;
2672 const unsigned channel = dsi.update_channel;
2673 /* line buffer is 1024 x 24bits */
2674 /* XXX: for some reason using full buffer size causes considerable TX
2675 * slowdown with update sizes that fill the whole buffer */
2676 const unsigned line_buf_size = 1023 * 3;
2678 DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
2681 dsi_vc_config_vp(channel);
2683 bytespp = dssdev->ctrl.pixel_size / 8;
2684 bytespl = w * bytespp;
2685 bytespf = bytespl * h;
2687 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
2688 * number of lines in a packet. See errata about VP_CLK_RATIO */
2690 if (bytespf < line_buf_size)
2691 packet_payload = bytespf;
2693 packet_payload = (line_buf_size) / bytespl * bytespl;
2695 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
2696 total_len = (bytespf / packet_payload) * packet_len;
2698 if (bytespf % packet_payload)
2699 total_len += (bytespf % packet_payload) + 1;
2701 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
2702 dsi_write_reg(DSI_VC_TE(channel), l);
2704 dsi_vc_write_long_header(channel, DSI_DT_DCS_LONG_WRITE, packet_len, 0);
2707 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
2709 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
2710 dsi_write_reg(DSI_VC_TE(channel), l);
2712 /* We put SIDLEMODE to no-idle for the duration of the transfer,
2713 * because DSS interrupts are not capable of waking up the CPU and the
2714 * framedone interrupt could be delayed for quite a long time. I think
2715 * the same goes for any DSS interrupts, but for some reason I have not
2716 * seen the problem anywhere else than here.
2718 dispc_disable_sidle();
2720 dsi_perf_mark_start();
2722 r = queue_delayed_work(dsi.workqueue, &dsi.framedone_timeout_work,
2723 msecs_to_jiffies(250));
2726 dss_start_update(dssdev);
2728 if (dsi.te_enabled) {
2729 /* disable LP_RX_TO, so that we can receive TE. Time to wait
2730 * for TE is longer than the timer allows */
2731 REG_FLD_MOD(DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
2733 dsi_vc_send_bta(channel);
2735 #ifdef DSI_CATCH_MISSING_TE
2736 mod_timer(&dsi.te_timer, jiffies + msecs_to_jiffies(250));
2741 #ifdef DSI_CATCH_MISSING_TE
2742 static void dsi_te_timeout(unsigned long arg)
2744 DSSERR("TE not received for 250ms!\n");
2748 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
2751 const int channel = dsi.update_channel;
2753 DSSERR("Framedone not received for 250ms!\n");
2755 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
2756 * 250ms which would conflict with this timeout work. What should be
2757 * done is first cancel the transfer on the HW, and then cancel the
2758 * possibly scheduled framedone work */
2760 /* SIDLEMODE back to smart-idle */
2761 dispc_enable_sidle();
2763 if (dsi.te_enabled) {
2764 /* enable LP_RX_TO again after the TE */
2765 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
2768 /* Send BTA after the frame. We need this for the TE to work, as TE
2769 * trigger is only sent for BTAs without preceding packet. Thus we need
2770 * to BTA after the pixel packets so that next BTA will cause TE
2773 * This is not needed when TE is not in use, but we do it anyway to
2774 * make sure that the transfer has been completed. It would be more
2775 * optimal, but more complex, to wait only just before starting next
2777 r = dsi_vc_send_bta_sync(channel);
2779 DSSERR("BTA after framedone failed\n");
2781 /* RX_FIFO_NOT_EMPTY */
2782 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2783 DSSERR("Received error during frame transfer:\n");
2784 dsi_vc_flush_receive_data(channel);
2787 dsi.framedone_callback(-ETIMEDOUT, dsi.framedone_data);
2790 static void dsi_framedone_irq_callback(void *data, u32 mask)
2793 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
2794 * turns itself off. However, DSI still has the pixels in its buffers,
2795 * and is sending the data.
2798 /* SIDLEMODE back to smart-idle */
2799 dispc_enable_sidle();
2801 r = queue_work(dsi.workqueue, &dsi.framedone_work);
2805 static void dsi_handle_framedone(void)
2808 const int channel = dsi.update_channel;
2810 DSSDBG("FRAMEDONE\n");
2812 if (dsi.te_enabled) {
2813 /* enable LP_RX_TO again after the TE */
2814 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
2817 /* Send BTA after the frame. We need this for the TE to work, as TE
2818 * trigger is only sent for BTAs without preceding packet. Thus we need
2819 * to BTA after the pixel packets so that next BTA will cause TE
2822 * This is not needed when TE is not in use, but we do it anyway to
2823 * make sure that the transfer has been completed. It would be more
2824 * optimal, but more complex, to wait only just before starting next
2826 r = dsi_vc_send_bta_sync(channel);
2828 DSSERR("BTA after framedone failed\n");
2830 /* RX_FIFO_NOT_EMPTY */
2831 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2832 DSSERR("Received error during frame transfer:\n");
2833 dsi_vc_flush_receive_data(channel);
2836 #ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
2837 dispc_fake_vsync_irq();
2841 static void dsi_framedone_work_callback(struct work_struct *work)
2845 cancel_delayed_work_sync(&dsi.framedone_timeout_work);
2847 dsi_handle_framedone();
2849 dsi_perf_show("DISPC");
2851 dsi.framedone_callback(0, dsi.framedone_data);
2854 int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
2855 u16 *x, u16 *y, u16 *w, u16 *h)
2859 dssdev->driver->get_resolution(dssdev, &dw, &dh);
2861 if (*x > dw || *y > dh)
2873 if (*w == 0 || *h == 0)
2876 dsi_perf_mark_setup();
2878 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
2879 dss_setup_partial_planes(dssdev, x, y, w, h);
2880 dispc_set_lcd_size(*w, *h);
2885 EXPORT_SYMBOL(omap_dsi_prepare_update);
2887 int omap_dsi_update(struct omap_dss_device *dssdev,
2889 u16 x, u16 y, u16 w, u16 h,
2890 void (*callback)(int, void *), void *data)
2892 dsi.update_channel = channel;
2894 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
2895 dsi.framedone_callback = callback;
2896 dsi.framedone_data = data;
2898 dsi.update_region.x = x;
2899 dsi.update_region.y = y;
2900 dsi.update_region.w = w;
2901 dsi.update_region.h = h;
2902 dsi.update_region.device = dssdev;
2904 dsi_update_screen_dispc(dssdev, x, y, w, h);
2906 dsi_update_screen_l4(dssdev, x, y, w, h);
2907 dsi_perf_show("L4");
2913 EXPORT_SYMBOL(omap_dsi_update);
2917 static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
2921 r = omap_dispc_register_isr(dsi_framedone_irq_callback, NULL,
2922 DISPC_IRQ_FRAMEDONE);
2924 DSSERR("can't get FRAMEDONE irq\n");
2928 dispc_set_lcd_display_type(OMAP_DSS_LCD_DISPLAY_TFT);
2930 dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_DSI);
2931 dispc_enable_fifohandcheck(1);
2933 dispc_set_tft_data_lines(dssdev->ctrl.pixel_size);
2936 struct omap_video_timings timings = {
2945 dispc_set_lcd_timings(&timings);
2951 static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev)
2953 omap_dispc_unregister_isr(dsi_framedone_irq_callback, NULL,
2954 DISPC_IRQ_FRAMEDONE);
2957 static int dsi_configure_dsi_clocks(struct omap_dss_device *dssdev)
2959 struct dsi_clock_info cinfo;
2962 /* we always use DSS2_FCK as input clock */
2963 cinfo.use_dss2_fck = true;
2964 cinfo.regn = dssdev->phy.dsi.div.regn;
2965 cinfo.regm = dssdev->phy.dsi.div.regm;
2966 cinfo.regm3 = dssdev->phy.dsi.div.regm3;
2967 cinfo.regm4 = dssdev->phy.dsi.div.regm4;
2968 r = dsi_calc_clock_rates(&cinfo);
2972 r = dsi_pll_set_clock_div(&cinfo);
2974 DSSERR("Failed to set dsi clocks\n");
2981 static int dsi_configure_dispc_clocks(struct omap_dss_device *dssdev)
2983 struct dispc_clock_info dispc_cinfo;
2985 unsigned long long fck;
2987 fck = dsi_get_dsi1_pll_rate();
2989 dispc_cinfo.lck_div = dssdev->phy.dsi.div.lck_div;
2990 dispc_cinfo.pck_div = dssdev->phy.dsi.div.pck_div;
2992 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
2994 DSSERR("Failed to calc dispc clocks\n");
2998 r = dispc_set_clock_div(&dispc_cinfo);
3000 DSSERR("Failed to set dispc clocks\n");
3007 static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
3011 _dsi_print_reset_status();
3013 r = dsi_pll_init(dssdev, true, true);
3017 r = dsi_configure_dsi_clocks(dssdev);
3021 dss_select_dispc_clk_source(DSS_SRC_DSI1_PLL_FCLK);
3022 dss_select_dsi_clk_source(DSS_SRC_DSI2_PLL_FCLK);
3026 r = dsi_configure_dispc_clocks(dssdev);
3030 r = dsi_complexio_init(dssdev);
3034 _dsi_print_reset_status();
3036 dsi_proto_timings(dssdev);
3037 dsi_set_lp_clk_divisor(dssdev);
3040 _dsi_print_reset_status();
3042 r = dsi_proto_config(dssdev);
3046 /* enable interface */
3047 dsi_vc_enable(0, 1);
3048 dsi_vc_enable(1, 1);
3049 dsi_vc_enable(2, 1);
3050 dsi_vc_enable(3, 1);
3052 dsi_force_tx_stop_mode_io();
3056 dsi_complexio_uninit();
3058 dss_select_dispc_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
3059 dss_select_dsi_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
3066 static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev)
3068 dss_select_dispc_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
3069 dss_select_dsi_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
3070 dsi_complexio_uninit();
3074 static int dsi_core_init(void)
3077 REG_FLD_MOD(DSI_SYSCONFIG, 1, 0, 0);
3080 REG_FLD_MOD(DSI_SYSCONFIG, 1, 2, 2);
3082 /* SIDLEMODE smart-idle */
3083 REG_FLD_MOD(DSI_SYSCONFIG, 2, 4, 3);
3085 _dsi_initialize_irq();
3090 int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
3094 DSSDBG("dsi_display_enable\n");
3096 WARN_ON(!dsi_bus_is_locked());
3098 mutex_lock(&dsi.lock);
3100 r = omap_dss_start_device(dssdev);
3102 DSSERR("failed to start device\n");
3107 dsi_enable_pll_clock(1);
3115 r = dsi_display_init_dispc(dssdev);
3119 r = dsi_display_init_dsi(dssdev);
3123 mutex_unlock(&dsi.lock);
3128 dsi_display_uninit_dispc(dssdev);
3131 dsi_enable_pll_clock(0);
3132 omap_dss_stop_device(dssdev);
3134 mutex_unlock(&dsi.lock);
3135 DSSDBG("dsi_display_enable FAILED\n");
3138 EXPORT_SYMBOL(omapdss_dsi_display_enable);
3140 void omapdss_dsi_display_disable(struct omap_dss_device *dssdev)
3142 DSSDBG("dsi_display_disable\n");
3144 WARN_ON(!dsi_bus_is_locked());
3146 mutex_lock(&dsi.lock);
3148 dsi_display_uninit_dispc(dssdev);
3150 dsi_display_uninit_dsi(dssdev);
3153 dsi_enable_pll_clock(0);
3155 omap_dss_stop_device(dssdev);
3157 mutex_unlock(&dsi.lock);
3159 EXPORT_SYMBOL(omapdss_dsi_display_disable);
3161 int omapdss_dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
3163 dsi.te_enabled = enable;
3166 EXPORT_SYMBOL(omapdss_dsi_enable_te);
3168 void dsi_get_overlay_fifo_thresholds(enum omap_plane plane,
3169 u32 fifo_size, enum omap_burst_size *burst_size,
3170 u32 *fifo_low, u32 *fifo_high)
3172 unsigned burst_size_bytes;
3174 *burst_size = OMAP_DSS_BURST_16x32;
3175 burst_size_bytes = 16 * 32 / 8;
3177 *fifo_high = fifo_size - burst_size_bytes;
3178 *fifo_low = fifo_size - burst_size_bytes * 8;
3181 int dsi_init_display(struct omap_dss_device *dssdev)
3183 DSSDBG("DSI init\n");
3185 /* XXX these should be figured out dynamically */
3186 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
3187 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
3189 dsi.vc[0].dssdev = dssdev;
3190 dsi.vc[1].dssdev = dssdev;
3195 int dsi_init(struct platform_device *pdev)
3200 spin_lock_init(&dsi.errors_lock);
3203 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
3204 spin_lock_init(&dsi.irq_stats_lock);
3205 dsi.irq_stats.last_reset = jiffies;
3208 init_completion(&dsi.bta_completion);
3210 mutex_init(&dsi.lock);
3211 sema_init(&dsi.bus_lock, 1);
3213 dsi.workqueue = create_singlethread_workqueue("dsi");
3214 if (dsi.workqueue == NULL)
3217 INIT_WORK(&dsi.framedone_work, dsi_framedone_work_callback);
3218 INIT_DELAYED_WORK_DEFERRABLE(&dsi.framedone_timeout_work,
3219 dsi_framedone_timeout_work_callback);
3221 #ifdef DSI_CATCH_MISSING_TE
3222 init_timer(&dsi.te_timer);
3223 dsi.te_timer.function = dsi_te_timeout;
3224 dsi.te_timer.data = 0;
3226 dsi.base = ioremap(DSI_BASE, DSI_SZ_REGS);
3228 DSSERR("can't ioremap DSI\n");
3233 dsi.vdds_dsi_reg = dss_get_vdds_dsi();
3234 if (IS_ERR(dsi.vdds_dsi_reg)) {
3236 DSSERR("can't get VDDS_DSI regulator\n");
3237 r = PTR_ERR(dsi.vdds_dsi_reg);
3243 rev = dsi_read_reg(DSI_REVISION);
3244 printk(KERN_INFO "OMAP DSI rev %d.%d\n",
3245 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
3253 destroy_workqueue(dsi.workqueue);
3261 destroy_workqueue(dsi.workqueue);
3263 DSSDBG("omap_dsi_exit\n");