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)
168 #define DSI_CIO_IRQ_ERROR_MASK \
169 (DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
170 DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
171 DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRCONTROL1 | \
172 DSI_CIO_IRQ_ERRCONTROL2 | DSI_CIO_IRQ_ERRCONTROL3 | \
173 DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
174 DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
175 DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3)
177 #define DSI_DT_DCS_SHORT_WRITE_0 0x05
178 #define DSI_DT_DCS_SHORT_WRITE_1 0x15
179 #define DSI_DT_DCS_READ 0x06
180 #define DSI_DT_SET_MAX_RET_PKG_SIZE 0x37
181 #define DSI_DT_NULL_PACKET 0x09
182 #define DSI_DT_DCS_LONG_WRITE 0x39
184 #define DSI_DT_RX_ACK_WITH_ERR 0x02
185 #define DSI_DT_RX_DCS_LONG_READ 0x1c
186 #define DSI_DT_RX_SHORT_READ_1 0x21
187 #define DSI_DT_RX_SHORT_READ_2 0x22
189 #define FINT_MAX 2100000
190 #define FINT_MIN 750000
191 #define REGN_MAX (1 << 7)
192 #define REGM_MAX ((1 << 11) - 1)
193 #define REGM3_MAX (1 << 4)
194 #define REGM4_MAX (1 << 4)
195 #define LP_DIV_MAX ((1 << 13) - 1)
199 DSI_FIFO_SIZE_32 = 1,
200 DSI_FIFO_SIZE_64 = 2,
201 DSI_FIFO_SIZE_96 = 3,
202 DSI_FIFO_SIZE_128 = 4,
210 struct dsi_update_region {
212 struct omap_dss_device *device;
215 struct dsi_irq_stats {
216 unsigned long last_reset;
218 unsigned dsi_irqs[32];
219 unsigned vc_irqs[4][32];
220 unsigned cio_irqs[32];
225 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;
239 struct semaphore bus_lock;
243 struct completion bta_completion;
244 void (*bta_callback)(void);
247 struct dsi_update_region update_region;
251 struct workqueue_struct *workqueue;
253 void (*framedone_callback)(int, void *);
254 void *framedone_data;
256 struct delayed_work framedone_timeout_work;
258 #ifdef DSI_CATCH_MISSING_TE
259 struct timer_list te_timer;
262 unsigned long cache_req_pck;
263 unsigned long cache_clk_freq;
264 struct dsi_clock_info cache_cinfo;
267 spinlock_t errors_lock;
269 ktime_t perf_setup_time;
270 ktime_t perf_start_time;
275 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
276 spinlock_t irq_stats_lock;
277 struct dsi_irq_stats irq_stats;
282 static unsigned int dsi_perf;
283 module_param_named(dsi_perf, dsi_perf, bool, 0644);
286 static inline void dsi_write_reg(const struct dsi_reg idx, u32 val)
288 __raw_writel(val, dsi.base + idx.idx);
291 static inline u32 dsi_read_reg(const struct dsi_reg idx)
293 return __raw_readl(dsi.base + idx.idx);
296 static struct regulator *dsi_get_vdds_dsi(void)
298 struct regulator *reg;
300 if (dsi.vdds_dsi_reg != NULL)
301 return dsi.vdds_dsi_reg;
303 reg = regulator_get(&dsi.pdev->dev, "vdds_dsi");
305 dsi.vdds_dsi_reg = reg;
311 void dsi_save_context(void)
315 void dsi_restore_context(void)
319 void dsi_bus_lock(void)
323 EXPORT_SYMBOL(dsi_bus_lock);
325 void dsi_bus_unlock(void)
329 EXPORT_SYMBOL(dsi_bus_unlock);
331 static bool dsi_bus_is_locked(void)
333 return dsi.bus_lock.count == 0;
336 static inline int wait_for_bit_change(const struct dsi_reg idx, int bitnum,
341 while (REG_GET(idx, bitnum, bitnum) != value) {
350 static void dsi_perf_mark_setup(void)
352 dsi.perf_setup_time = ktime_get();
355 static void dsi_perf_mark_start(void)
357 dsi.perf_start_time = ktime_get();
360 static void dsi_perf_show(const char *name)
362 ktime_t t, setup_time, trans_time;
364 u32 setup_us, trans_us, total_us;
371 setup_time = ktime_sub(dsi.perf_start_time, dsi.perf_setup_time);
372 setup_us = (u32)ktime_to_us(setup_time);
376 trans_time = ktime_sub(t, dsi.perf_start_time);
377 trans_us = (u32)ktime_to_us(trans_time);
381 total_us = setup_us + trans_us;
383 total_bytes = dsi.update_region.w *
384 dsi.update_region.h *
385 dsi.update_region.device->ctrl.pixel_size / 8;
387 printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
388 "%u bytes, %u kbytes/sec\n",
393 1000*1000 / total_us,
395 total_bytes * 1000 / total_us);
398 #define dsi_perf_mark_setup()
399 #define dsi_perf_mark_start()
400 #define dsi_perf_show(x)
403 static void print_irq_status(u32 status)
406 if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0)
409 printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status);
412 if (status & DSI_IRQ_##x) \
438 static void print_irq_status_vc(int channel, u32 status)
441 if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
444 printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status);
447 if (status & DSI_VC_IRQ_##x) \
464 static void print_irq_status_cio(u32 status)
466 printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status);
469 if (status & DSI_CIO_IRQ_##x) \
483 PIS(ERRCONTENTIONLP0_1);
484 PIS(ERRCONTENTIONLP1_1);
485 PIS(ERRCONTENTIONLP0_2);
486 PIS(ERRCONTENTIONLP1_2);
487 PIS(ERRCONTENTIONLP0_3);
488 PIS(ERRCONTENTIONLP1_3);
489 PIS(ULPSACTIVENOT_ALL0);
490 PIS(ULPSACTIVENOT_ALL1);
496 static int debug_irq;
498 /* called from dss */
499 void dsi_irq_handler(void)
501 u32 irqstatus, vcstatus, ciostatus;
504 irqstatus = dsi_read_reg(DSI_IRQSTATUS);
506 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
507 spin_lock(&dsi.irq_stats_lock);
508 dsi.irq_stats.irq_count++;
509 dss_collect_irq_stats(irqstatus, dsi.irq_stats.dsi_irqs);
512 if (irqstatus & DSI_IRQ_ERROR_MASK) {
513 DSSERR("DSI error, irqstatus %x\n", irqstatus);
514 print_irq_status(irqstatus);
515 spin_lock(&dsi.errors_lock);
516 dsi.errors |= irqstatus & DSI_IRQ_ERROR_MASK;
517 spin_unlock(&dsi.errors_lock);
518 } else if (debug_irq) {
519 print_irq_status(irqstatus);
522 #ifdef DSI_CATCH_MISSING_TE
523 if (irqstatus & DSI_IRQ_TE_TRIGGER)
524 del_timer(&dsi.te_timer);
527 for (i = 0; i < 4; ++i) {
528 if ((irqstatus & (1<<i)) == 0)
531 vcstatus = dsi_read_reg(DSI_VC_IRQSTATUS(i));
533 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
534 dss_collect_irq_stats(vcstatus, dsi.irq_stats.vc_irqs[i]);
537 if (vcstatus & DSI_VC_IRQ_BTA) {
538 complete(&dsi.bta_completion);
540 if (dsi.bta_callback)
544 if (vcstatus & DSI_VC_IRQ_ERROR_MASK) {
545 DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
547 print_irq_status_vc(i, vcstatus);
548 } else if (debug_irq) {
549 print_irq_status_vc(i, vcstatus);
552 dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus);
553 /* flush posted write */
554 dsi_read_reg(DSI_VC_IRQSTATUS(i));
557 if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
558 ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
560 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
561 dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);
564 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
565 /* flush posted write */
566 dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
568 if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
569 DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
570 print_irq_status_cio(ciostatus);
571 } else if (debug_irq) {
572 print_irq_status_cio(ciostatus);
576 dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
577 /* flush posted write */
578 dsi_read_reg(DSI_IRQSTATUS);
580 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
581 spin_unlock(&dsi.irq_stats_lock);
586 static void _dsi_initialize_irq(void)
591 /* disable all interrupts */
592 dsi_write_reg(DSI_IRQENABLE, 0);
593 for (i = 0; i < 4; ++i)
594 dsi_write_reg(DSI_VC_IRQENABLE(i), 0);
595 dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, 0);
597 /* clear interrupt status */
598 l = dsi_read_reg(DSI_IRQSTATUS);
599 dsi_write_reg(DSI_IRQSTATUS, l & ~DSI_IRQ_CHANNEL_MASK);
601 for (i = 0; i < 4; ++i) {
602 l = dsi_read_reg(DSI_VC_IRQSTATUS(i));
603 dsi_write_reg(DSI_VC_IRQSTATUS(i), l);
606 l = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
607 dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, l);
609 /* enable error irqs */
610 l = DSI_IRQ_ERROR_MASK;
611 #ifdef DSI_CATCH_MISSING_TE
612 l |= DSI_IRQ_TE_TRIGGER;
614 dsi_write_reg(DSI_IRQENABLE, l);
616 l = DSI_VC_IRQ_ERROR_MASK;
617 for (i = 0; i < 4; ++i)
618 dsi_write_reg(DSI_VC_IRQENABLE(i), l);
620 l = DSI_CIO_IRQ_ERROR_MASK;
621 dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, l);
624 static u32 dsi_get_errors(void)
628 spin_lock_irqsave(&dsi.errors_lock, flags);
631 spin_unlock_irqrestore(&dsi.errors_lock, flags);
635 static void dsi_vc_enable_bta_irq(int channel)
639 dsi_write_reg(DSI_VC_IRQSTATUS(channel), DSI_VC_IRQ_BTA);
641 l = dsi_read_reg(DSI_VC_IRQENABLE(channel));
643 dsi_write_reg(DSI_VC_IRQENABLE(channel), l);
646 static void dsi_vc_disable_bta_irq(int channel)
650 l = dsi_read_reg(DSI_VC_IRQENABLE(channel));
651 l &= ~DSI_VC_IRQ_BTA;
652 dsi_write_reg(DSI_VC_IRQENABLE(channel), l);
655 /* DSI func clock. this could also be DSI2_PLL_FCLK */
656 static inline void enable_clocks(bool enable)
659 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
661 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
664 /* source clock for DSI PLL. this could also be PCLKFREE */
665 static inline void dsi_enable_pll_clock(bool enable)
668 dss_clk_enable(DSS_CLK_FCK2);
670 dss_clk_disable(DSS_CLK_FCK2);
672 if (enable && dsi.pll_locked) {
673 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1)
674 DSSERR("cannot lock PLL when enabling clocks\n");
679 static void _dsi_print_reset_status(void)
686 /* A dummy read using the SCP interface to any DSIPHY register is
687 * required after DSIPHY reset to complete the reset of the DSI complex
689 l = dsi_read_reg(DSI_DSIPHY_CFG5);
691 printk(KERN_DEBUG "DSI resets: ");
693 l = dsi_read_reg(DSI_PLL_STATUS);
694 printk("PLL (%d) ", FLD_GET(l, 0, 0));
696 l = dsi_read_reg(DSI_COMPLEXIO_CFG1);
697 printk("CIO (%d) ", FLD_GET(l, 29, 29));
699 l = dsi_read_reg(DSI_DSIPHY_CFG5);
700 printk("PHY (%x, %d, %d, %d)\n",
707 #define _dsi_print_reset_status()
710 static inline int dsi_if_enable(bool enable)
712 DSSDBG("dsi_if_enable(%d)\n", enable);
714 enable = enable ? 1 : 0;
715 REG_FLD_MOD(DSI_CTRL, enable, 0, 0); /* IF_EN */
717 if (wait_for_bit_change(DSI_CTRL, 0, enable) != enable) {
718 DSSERR("Failed to set dsi_if_enable to %d\n", enable);
725 unsigned long dsi_get_dsi1_pll_rate(void)
727 return dsi.current_cinfo.dsi1_pll_fclk;
730 static unsigned long dsi_get_dsi2_pll_rate(void)
732 return dsi.current_cinfo.dsi2_pll_fclk;
735 static unsigned long dsi_get_txbyteclkhs(void)
737 return dsi.current_cinfo.clkin4ddr / 16;
740 static unsigned long dsi_fclk_rate(void)
744 if (dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK) {
745 /* DSI FCLK source is DSS1_ALWON_FCK, which is dss1_fck */
746 r = dss_clk_get_rate(DSS_CLK_FCK1);
748 /* DSI FCLK source is DSI2_PLL_FCLK */
749 r = dsi_get_dsi2_pll_rate();
755 static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev)
757 unsigned long dsi_fclk;
759 unsigned long lp_clk;
761 lp_clk_div = dssdev->phy.dsi.div.lp_clk_div;
763 if (lp_clk_div == 0 || lp_clk_div > LP_DIV_MAX)
766 dsi_fclk = dsi_fclk_rate();
768 lp_clk = dsi_fclk / 2 / lp_clk_div;
770 DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
771 dsi.current_cinfo.lp_clk = lp_clk;
772 dsi.current_cinfo.lp_clk_div = lp_clk_div;
774 REG_FLD_MOD(DSI_CLK_CTRL, lp_clk_div, 12, 0); /* LP_CLK_DIVISOR */
776 REG_FLD_MOD(DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0,
777 21, 21); /* LP_RX_SYNCHRO_ENABLE */
783 enum dsi_pll_power_state {
784 DSI_PLL_POWER_OFF = 0x0,
785 DSI_PLL_POWER_ON_HSCLK = 0x1,
786 DSI_PLL_POWER_ON_ALL = 0x2,
787 DSI_PLL_POWER_ON_DIV = 0x3,
790 static int dsi_pll_power(enum dsi_pll_power_state state)
794 REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30); /* PLL_PWR_CMD */
797 while (FLD_GET(dsi_read_reg(DSI_CLK_CTRL), 29, 28) != state) {
799 DSSERR("Failed to set DSI PLL power mode to %d\n",
809 /* calculate clock rates using dividers in cinfo */
810 static int dsi_calc_clock_rates(struct omap_dss_device *dssdev,
811 struct dsi_clock_info *cinfo)
813 if (cinfo->regn == 0 || cinfo->regn > REGN_MAX)
816 if (cinfo->regm == 0 || cinfo->regm > REGM_MAX)
819 if (cinfo->regm3 > REGM3_MAX)
822 if (cinfo->regm4 > REGM4_MAX)
825 if (cinfo->use_dss2_fck) {
826 cinfo->clkin = dss_clk_get_rate(DSS_CLK_FCK2);
827 /* XXX it is unclear if highfreq should be used
828 * with DSS2_FCK source also */
831 cinfo->clkin = dispc_pclk_rate(dssdev->manager->id);
833 if (cinfo->clkin < 32000000)
839 cinfo->fint = cinfo->clkin / (cinfo->regn * (cinfo->highfreq ? 2 : 1));
841 if (cinfo->fint > FINT_MAX || cinfo->fint < FINT_MIN)
844 cinfo->clkin4ddr = 2 * cinfo->regm * cinfo->fint;
846 if (cinfo->clkin4ddr > 1800 * 1000 * 1000)
849 if (cinfo->regm3 > 0)
850 cinfo->dsi1_pll_fclk = cinfo->clkin4ddr / cinfo->regm3;
852 cinfo->dsi1_pll_fclk = 0;
854 if (cinfo->regm4 > 0)
855 cinfo->dsi2_pll_fclk = cinfo->clkin4ddr / cinfo->regm4;
857 cinfo->dsi2_pll_fclk = 0;
862 int dsi_pll_calc_clock_div_pck(bool is_tft, unsigned long req_pck,
863 struct dsi_clock_info *dsi_cinfo,
864 struct dispc_clock_info *dispc_cinfo)
866 struct dsi_clock_info cur, best;
867 struct dispc_clock_info best_dispc;
870 unsigned long dss_clk_fck2;
872 dss_clk_fck2 = dss_clk_get_rate(DSS_CLK_FCK2);
874 if (req_pck == dsi.cache_req_pck &&
875 dsi.cache_cinfo.clkin == dss_clk_fck2) {
876 DSSDBG("DSI clock info found from cache\n");
877 *dsi_cinfo = dsi.cache_cinfo;
878 dispc_find_clk_divs(is_tft, req_pck, dsi_cinfo->dsi1_pll_fclk,
883 min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK;
885 if (min_fck_per_pck &&
886 req_pck * min_fck_per_pck > DISPC_MAX_FCK) {
887 DSSERR("Requested pixel clock not possible with the current "
888 "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning "
889 "the constraint off.\n");
893 DSSDBG("dsi_pll_calc\n");
896 memset(&best, 0, sizeof(best));
897 memset(&best_dispc, 0, sizeof(best_dispc));
899 memset(&cur, 0, sizeof(cur));
900 cur.clkin = dss_clk_fck2;
901 cur.use_dss2_fck = 1;
904 /* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */
905 /* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */
906 /* To reduce PLL lock time, keep Fint high (around 2 MHz) */
907 for (cur.regn = 1; cur.regn < REGN_MAX; ++cur.regn) {
908 if (cur.highfreq == 0)
909 cur.fint = cur.clkin / cur.regn;
911 cur.fint = cur.clkin / (2 * cur.regn);
913 if (cur.fint > FINT_MAX || cur.fint < FINT_MIN)
916 /* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */
917 for (cur.regm = 1; cur.regm < REGM_MAX; ++cur.regm) {
920 a = 2 * cur.regm * (cur.clkin/1000);
921 b = cur.regn * (cur.highfreq + 1);
922 cur.clkin4ddr = a / b * 1000;
924 if (cur.clkin4ddr > 1800 * 1000 * 1000)
927 /* DSI1_PLL_FCLK(MHz) = DSIPHY(MHz) / regm3 < 173MHz */
928 for (cur.regm3 = 1; cur.regm3 < REGM3_MAX;
930 struct dispc_clock_info cur_dispc;
931 cur.dsi1_pll_fclk = cur.clkin4ddr / cur.regm3;
933 /* this will narrow down the search a bit,
934 * but still give pixclocks below what was
936 if (cur.dsi1_pll_fclk < req_pck)
939 if (cur.dsi1_pll_fclk > DISPC_MAX_FCK)
942 if (min_fck_per_pck &&
944 req_pck * min_fck_per_pck)
949 dispc_find_clk_divs(is_tft, req_pck,
953 if (abs(cur_dispc.pck - req_pck) <
954 abs(best_dispc.pck - req_pck)) {
956 best_dispc = cur_dispc;
958 if (cur_dispc.pck == req_pck)
966 if (min_fck_per_pck) {
967 DSSERR("Could not find suitable clock settings.\n"
968 "Turning FCK/PCK constraint off and"
974 DSSERR("Could not find suitable clock settings.\n");
979 /* DSI2_PLL_FCLK (regm4) is not used */
981 best.dsi2_pll_fclk = 0;
986 *dispc_cinfo = best_dispc;
988 dsi.cache_req_pck = req_pck;
989 dsi.cache_clk_freq = 0;
990 dsi.cache_cinfo = best;
995 int dsi_pll_set_clock_div(struct dsi_clock_info *cinfo)
1003 dsi.current_cinfo.fint = cinfo->fint;
1004 dsi.current_cinfo.clkin4ddr = cinfo->clkin4ddr;
1005 dsi.current_cinfo.dsi1_pll_fclk = cinfo->dsi1_pll_fclk;
1006 dsi.current_cinfo.dsi2_pll_fclk = cinfo->dsi2_pll_fclk;
1008 dsi.current_cinfo.regn = cinfo->regn;
1009 dsi.current_cinfo.regm = cinfo->regm;
1010 dsi.current_cinfo.regm3 = cinfo->regm3;
1011 dsi.current_cinfo.regm4 = cinfo->regm4;
1013 DSSDBG("DSI Fint %ld\n", cinfo->fint);
1015 DSSDBG("clkin (%s) rate %ld, highfreq %d\n",
1016 cinfo->use_dss2_fck ? "dss2_fck" : "pclkfree",
1020 /* DSIPHY == CLKIN4DDR */
1021 DSSDBG("CLKIN4DDR = 2 * %d / %d * %lu / %d = %lu\n",
1025 cinfo->highfreq + 1,
1028 DSSDBG("Data rate on 1 DSI lane %ld Mbps\n",
1029 cinfo->clkin4ddr / 1000 / 1000 / 2);
1031 DSSDBG("Clock lane freq %ld Hz\n", cinfo->clkin4ddr / 4);
1033 DSSDBG("regm3 = %d, dsi1_pll_fclk = %lu\n",
1034 cinfo->regm3, cinfo->dsi1_pll_fclk);
1035 DSSDBG("regm4 = %d, dsi2_pll_fclk = %lu\n",
1036 cinfo->regm4, cinfo->dsi2_pll_fclk);
1038 REG_FLD_MOD(DSI_PLL_CONTROL, 0, 0, 0); /* DSI_PLL_AUTOMODE = manual */
1040 l = dsi_read_reg(DSI_PLL_CONFIGURATION1);
1041 l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */
1042 l = FLD_MOD(l, cinfo->regn - 1, 7, 1); /* DSI_PLL_REGN */
1043 l = FLD_MOD(l, cinfo->regm, 18, 8); /* DSI_PLL_REGM */
1044 l = FLD_MOD(l, cinfo->regm3 > 0 ? cinfo->regm3 - 1 : 0,
1045 22, 19); /* DSI_CLOCK_DIV */
1046 l = FLD_MOD(l, cinfo->regm4 > 0 ? cinfo->regm4 - 1 : 0,
1047 26, 23); /* DSIPROTO_CLOCK_DIV */
1048 dsi_write_reg(DSI_PLL_CONFIGURATION1, l);
1050 BUG_ON(cinfo->fint < 750000 || cinfo->fint > 2100000);
1051 if (cinfo->fint < 1000000)
1053 else if (cinfo->fint < 1250000)
1055 else if (cinfo->fint < 1500000)
1057 else if (cinfo->fint < 1750000)
1062 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1063 l = FLD_MOD(l, f, 4, 1); /* DSI_PLL_FREQSEL */
1064 l = FLD_MOD(l, cinfo->use_dss2_fck ? 0 : 1,
1065 11, 11); /* DSI_PLL_CLKSEL */
1066 l = FLD_MOD(l, cinfo->highfreq,
1067 12, 12); /* DSI_PLL_HIGHFREQ */
1068 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1069 l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */
1070 l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */
1071 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1073 REG_FLD_MOD(DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */
1075 if (wait_for_bit_change(DSI_PLL_GO, 0, 0) != 0) {
1076 DSSERR("dsi pll go bit not going down.\n");
1081 if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) {
1082 DSSERR("cannot lock PLL\n");
1089 l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
1090 l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */
1091 l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */
1092 l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */
1093 l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */
1094 l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */
1095 l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */
1096 l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
1097 l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */
1098 l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */
1099 l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */
1100 l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */
1101 l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */
1102 l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */
1103 l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */
1104 dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
1106 DSSDBG("PLL config done\n");
1111 int dsi_pll_init(struct omap_dss_device *dssdev, bool enable_hsclk,
1115 enum dsi_pll_power_state pwstate;
1117 DSSDBG("PLL init\n");
1120 dsi_enable_pll_clock(1);
1122 r = regulator_enable(dsi.vdds_dsi_reg);
1126 /* XXX PLL does not come out of reset without this... */
1127 dispc_pck_free_enable(1);
1129 if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) {
1130 DSSERR("PLL not coming out of reset.\n");
1132 dispc_pck_free_enable(0);
1136 /* XXX ... but if left on, we get problems when planes do not
1137 * fill the whole display. No idea about this */
1138 dispc_pck_free_enable(0);
1140 if (enable_hsclk && enable_hsdiv)
1141 pwstate = DSI_PLL_POWER_ON_ALL;
1142 else if (enable_hsclk)
1143 pwstate = DSI_PLL_POWER_ON_HSCLK;
1144 else if (enable_hsdiv)
1145 pwstate = DSI_PLL_POWER_ON_DIV;
1147 pwstate = DSI_PLL_POWER_OFF;
1149 r = dsi_pll_power(pwstate);
1154 DSSDBG("PLL init done\n");
1158 regulator_disable(dsi.vdds_dsi_reg);
1161 dsi_enable_pll_clock(0);
1165 void dsi_pll_uninit(void)
1168 dsi_enable_pll_clock(0);
1171 dsi_pll_power(DSI_PLL_POWER_OFF);
1172 regulator_disable(dsi.vdds_dsi_reg);
1173 DSSDBG("PLL uninit done\n");
1176 void dsi_dump_clocks(struct seq_file *s)
1179 struct dsi_clock_info *cinfo = &dsi.current_cinfo;
1183 clksel = REG_GET(DSI_PLL_CONFIGURATION2, 11, 11);
1185 seq_printf(s, "- DSI PLL -\n");
1187 seq_printf(s, "dsi pll source = %s\n",
1189 "dss2_alwon_fclk" : "pclkfree");
1191 seq_printf(s, "Fint\t\t%-16luregn %u\n", cinfo->fint, cinfo->regn);
1193 seq_printf(s, "CLKIN4DDR\t%-16luregm %u\n",
1194 cinfo->clkin4ddr, cinfo->regm);
1196 seq_printf(s, "dsi1_pll_fck\t%-16luregm3 %u\t(%s)\n",
1197 cinfo->dsi1_pll_fclk,
1199 dss_get_dispc_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
1202 seq_printf(s, "dsi2_pll_fck\t%-16luregm4 %u\t(%s)\n",
1203 cinfo->dsi2_pll_fclk,
1205 dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
1208 seq_printf(s, "- DSI -\n");
1210 seq_printf(s, "dsi fclk source = %s\n",
1211 dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
1212 "dss1_alwon_fclk" : "dsi2_pll_fclk");
1214 seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate());
1216 seq_printf(s, "DDR_CLK\t\t%lu\n",
1217 cinfo->clkin4ddr / 4);
1219 seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs());
1221 seq_printf(s, "LP_CLK\t\t%lu\n", cinfo->lp_clk);
1223 seq_printf(s, "VP_CLK\t\t%lu\n"
1225 dispc_lclk_rate(OMAP_DSS_CHANNEL_LCD),
1226 dispc_pclk_rate(OMAP_DSS_CHANNEL_LCD));
1231 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
1232 void dsi_dump_irqs(struct seq_file *s)
1234 unsigned long flags;
1235 struct dsi_irq_stats stats;
1237 spin_lock_irqsave(&dsi.irq_stats_lock, flags);
1239 stats = dsi.irq_stats;
1240 memset(&dsi.irq_stats, 0, sizeof(dsi.irq_stats));
1241 dsi.irq_stats.last_reset = jiffies;
1243 spin_unlock_irqrestore(&dsi.irq_stats_lock, flags);
1245 seq_printf(s, "period %u ms\n",
1246 jiffies_to_msecs(jiffies - stats.last_reset));
1248 seq_printf(s, "irqs %d\n", stats.irq_count);
1250 seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
1252 seq_printf(s, "-- DSI interrupts --\n");
1268 PIS(LDO_POWER_GOOD);
1273 seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
1274 stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
1275 stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
1276 stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
1277 stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
1279 seq_printf(s, "-- VC interrupts --\n");
1288 PIS(PP_BUSY_CHANGE);
1292 seq_printf(s, "%-20s %10d\n", #x, \
1293 stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
1295 seq_printf(s, "-- CIO interrupts --\n");
1308 PIS(ERRCONTENTIONLP0_1);
1309 PIS(ERRCONTENTIONLP1_1);
1310 PIS(ERRCONTENTIONLP0_2);
1311 PIS(ERRCONTENTIONLP1_2);
1312 PIS(ERRCONTENTIONLP0_3);
1313 PIS(ERRCONTENTIONLP1_3);
1314 PIS(ULPSACTIVENOT_ALL0);
1315 PIS(ULPSACTIVENOT_ALL1);
1320 void dsi_dump_regs(struct seq_file *s)
1322 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r))
1324 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
1326 DUMPREG(DSI_REVISION);
1327 DUMPREG(DSI_SYSCONFIG);
1328 DUMPREG(DSI_SYSSTATUS);
1329 DUMPREG(DSI_IRQSTATUS);
1330 DUMPREG(DSI_IRQENABLE);
1332 DUMPREG(DSI_COMPLEXIO_CFG1);
1333 DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
1334 DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
1335 DUMPREG(DSI_CLK_CTRL);
1336 DUMPREG(DSI_TIMING1);
1337 DUMPREG(DSI_TIMING2);
1338 DUMPREG(DSI_VM_TIMING1);
1339 DUMPREG(DSI_VM_TIMING2);
1340 DUMPREG(DSI_VM_TIMING3);
1341 DUMPREG(DSI_CLK_TIMING);
1342 DUMPREG(DSI_TX_FIFO_VC_SIZE);
1343 DUMPREG(DSI_RX_FIFO_VC_SIZE);
1344 DUMPREG(DSI_COMPLEXIO_CFG2);
1345 DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
1346 DUMPREG(DSI_VM_TIMING4);
1347 DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
1348 DUMPREG(DSI_VM_TIMING5);
1349 DUMPREG(DSI_VM_TIMING6);
1350 DUMPREG(DSI_VM_TIMING7);
1351 DUMPREG(DSI_STOPCLK_TIMING);
1353 DUMPREG(DSI_VC_CTRL(0));
1354 DUMPREG(DSI_VC_TE(0));
1355 DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
1356 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
1357 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
1358 DUMPREG(DSI_VC_IRQSTATUS(0));
1359 DUMPREG(DSI_VC_IRQENABLE(0));
1361 DUMPREG(DSI_VC_CTRL(1));
1362 DUMPREG(DSI_VC_TE(1));
1363 DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
1364 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
1365 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
1366 DUMPREG(DSI_VC_IRQSTATUS(1));
1367 DUMPREG(DSI_VC_IRQENABLE(1));
1369 DUMPREG(DSI_VC_CTRL(2));
1370 DUMPREG(DSI_VC_TE(2));
1371 DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
1372 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
1373 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
1374 DUMPREG(DSI_VC_IRQSTATUS(2));
1375 DUMPREG(DSI_VC_IRQENABLE(2));
1377 DUMPREG(DSI_VC_CTRL(3));
1378 DUMPREG(DSI_VC_TE(3));
1379 DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
1380 DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
1381 DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
1382 DUMPREG(DSI_VC_IRQSTATUS(3));
1383 DUMPREG(DSI_VC_IRQENABLE(3));
1385 DUMPREG(DSI_DSIPHY_CFG0);
1386 DUMPREG(DSI_DSIPHY_CFG1);
1387 DUMPREG(DSI_DSIPHY_CFG2);
1388 DUMPREG(DSI_DSIPHY_CFG5);
1390 DUMPREG(DSI_PLL_CONTROL);
1391 DUMPREG(DSI_PLL_STATUS);
1392 DUMPREG(DSI_PLL_GO);
1393 DUMPREG(DSI_PLL_CONFIGURATION1);
1394 DUMPREG(DSI_PLL_CONFIGURATION2);
1396 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
1400 enum dsi_complexio_power_state {
1401 DSI_COMPLEXIO_POWER_OFF = 0x0,
1402 DSI_COMPLEXIO_POWER_ON = 0x1,
1403 DSI_COMPLEXIO_POWER_ULPS = 0x2,
1406 static int dsi_complexio_power(enum dsi_complexio_power_state state)
1411 REG_FLD_MOD(DSI_COMPLEXIO_CFG1, state, 28, 27);
1414 while (FLD_GET(dsi_read_reg(DSI_COMPLEXIO_CFG1), 26, 25) != state) {
1416 DSSERR("failed to set complexio power state to "
1426 static void dsi_complexio_config(struct omap_dss_device *dssdev)
1430 int clk_lane = dssdev->phy.dsi.clk_lane;
1431 int data1_lane = dssdev->phy.dsi.data1_lane;
1432 int data2_lane = dssdev->phy.dsi.data2_lane;
1433 int clk_pol = dssdev->phy.dsi.clk_pol;
1434 int data1_pol = dssdev->phy.dsi.data1_pol;
1435 int data2_pol = dssdev->phy.dsi.data2_pol;
1437 r = dsi_read_reg(DSI_COMPLEXIO_CFG1);
1438 r = FLD_MOD(r, clk_lane, 2, 0);
1439 r = FLD_MOD(r, clk_pol, 3, 3);
1440 r = FLD_MOD(r, data1_lane, 6, 4);
1441 r = FLD_MOD(r, data1_pol, 7, 7);
1442 r = FLD_MOD(r, data2_lane, 10, 8);
1443 r = FLD_MOD(r, data2_pol, 11, 11);
1444 dsi_write_reg(DSI_COMPLEXIO_CFG1, r);
1446 /* The configuration of the DSI complex I/O (number of data lanes,
1447 position, differential order) should not be changed while
1448 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for
1449 the hardware to take into account a new configuration of the complex
1450 I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to
1451 follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1,
1452 then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set
1453 DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the
1454 DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the
1455 DSI complex I/O configuration is unknown. */
1458 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1459 REG_FLD_MOD(DSI_CTRL, 0, 0, 0);
1460 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20);
1461 REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
1465 static inline unsigned ns2ddr(unsigned ns)
1467 /* convert time in ns to ddr ticks, rounding up */
1468 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1469 return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
1472 static inline unsigned ddr2ns(unsigned ddr)
1474 unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
1475 return ddr * 1000 * 1000 / (ddr_clk / 1000);
1478 static void dsi_complexio_timings(void)
1481 u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
1482 u32 tlpx_half, tclk_trail, tclk_zero;
1485 /* calculate timings */
1487 /* 1 * DDR_CLK = 2 * UI */
1489 /* min 40ns + 4*UI max 85ns + 6*UI */
1490 ths_prepare = ns2ddr(70) + 2;
1492 /* min 145ns + 10*UI */
1493 ths_prepare_ths_zero = ns2ddr(175) + 2;
1495 /* min max(8*UI, 60ns+4*UI) */
1496 ths_trail = ns2ddr(60) + 5;
1499 ths_exit = ns2ddr(145);
1502 tlpx_half = ns2ddr(25);
1505 tclk_trail = ns2ddr(60) + 2;
1507 /* min 38ns, max 95ns */
1508 tclk_prepare = ns2ddr(65);
1510 /* min tclk-prepare + tclk-zero = 300ns */
1511 tclk_zero = ns2ddr(260);
1513 DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
1514 ths_prepare, ddr2ns(ths_prepare),
1515 ths_prepare_ths_zero, ddr2ns(ths_prepare_ths_zero));
1516 DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
1517 ths_trail, ddr2ns(ths_trail),
1518 ths_exit, ddr2ns(ths_exit));
1520 DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
1521 "tclk_zero %u (%uns)\n",
1522 tlpx_half, ddr2ns(tlpx_half),
1523 tclk_trail, ddr2ns(tclk_trail),
1524 tclk_zero, ddr2ns(tclk_zero));
1525 DSSDBG("tclk_prepare %u (%uns)\n",
1526 tclk_prepare, ddr2ns(tclk_prepare));
1528 /* program timings */
1530 r = dsi_read_reg(DSI_DSIPHY_CFG0);
1531 r = FLD_MOD(r, ths_prepare, 31, 24);
1532 r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
1533 r = FLD_MOD(r, ths_trail, 15, 8);
1534 r = FLD_MOD(r, ths_exit, 7, 0);
1535 dsi_write_reg(DSI_DSIPHY_CFG0, r);
1537 r = dsi_read_reg(DSI_DSIPHY_CFG1);
1538 r = FLD_MOD(r, tlpx_half, 22, 16);
1539 r = FLD_MOD(r, tclk_trail, 15, 8);
1540 r = FLD_MOD(r, tclk_zero, 7, 0);
1541 dsi_write_reg(DSI_DSIPHY_CFG1, r);
1543 r = dsi_read_reg(DSI_DSIPHY_CFG2);
1544 r = FLD_MOD(r, tclk_prepare, 7, 0);
1545 dsi_write_reg(DSI_DSIPHY_CFG2, r);
1549 static int dsi_complexio_init(struct omap_dss_device *dssdev)
1553 DSSDBG("dsi_complexio_init\n");
1555 /* CIO_CLK_ICG, enable L3 clk to CIO */
1556 REG_FLD_MOD(DSI_CLK_CTRL, 1, 14, 14);
1558 /* A dummy read using the SCP interface to any DSIPHY register is
1559 * required after DSIPHY reset to complete the reset of the DSI complex
1561 dsi_read_reg(DSI_DSIPHY_CFG5);
1563 if (wait_for_bit_change(DSI_DSIPHY_CFG5, 30, 1) != 1) {
1564 DSSERR("ComplexIO PHY not coming out of reset.\n");
1569 dsi_complexio_config(dssdev);
1571 r = dsi_complexio_power(DSI_COMPLEXIO_POWER_ON);
1576 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
1577 DSSERR("ComplexIO not coming out of reset.\n");
1582 if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 21, 1) != 1) {
1583 DSSERR("ComplexIO LDO power down.\n");
1588 dsi_complexio_timings();
1591 The configuration of the DSI complex I/O (number of data lanes,
1592 position, differential order) should not be changed while
1593 DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. For the
1594 hardware to recognize a new configuration of the complex I/O (done
1595 in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to follow
1596 this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1, next
1597 reset the DSS.DSI_CTRL[0] IF_EN to 0, then set DSS.DSI_CLK_CTRL[20]
1598 LP_CLK_ENABLE to 1, and finally, set again the DSS.DSI_CTRL[0] IF_EN
1599 bit to 1. If the sequence is not followed, the DSi complex I/O
1600 configuration is undetermined.
1604 REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
1608 DSSDBG("CIO init done\n");
1613 static void dsi_complexio_uninit(void)
1615 dsi_complexio_power(DSI_COMPLEXIO_POWER_OFF);
1618 static int _dsi_wait_reset(void)
1622 while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) {
1624 DSSERR("soft reset failed\n");
1633 static int _dsi_reset(void)
1636 REG_FLD_MOD(DSI_SYSCONFIG, 1, 1, 1);
1637 return _dsi_wait_reset();
1640 static void dsi_reset_tx_fifo(int channel)
1645 /* set fifosize of the channel to 0, then return the old size */
1646 l = dsi_read_reg(DSI_TX_FIFO_VC_SIZE);
1648 mask = FLD_MASK((8 * channel) + 7, (8 * channel) + 4);
1649 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, l & ~mask);
1651 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, l);
1654 static void dsi_config_tx_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("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
1681 dsi_write_reg(DSI_TX_FIFO_VC_SIZE, r);
1684 static void dsi_config_rx_fifo(enum fifo_size size1, enum fifo_size size2,
1685 enum fifo_size size3, enum fifo_size size4)
1691 dsi.vc[0].fifo_size = size1;
1692 dsi.vc[1].fifo_size = size2;
1693 dsi.vc[2].fifo_size = size3;
1694 dsi.vc[3].fifo_size = size4;
1696 for (i = 0; i < 4; i++) {
1698 int size = dsi.vc[i].fifo_size;
1700 if (add + size > 4) {
1701 DSSERR("Illegal FIFO configuration\n");
1705 v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
1707 /*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
1711 dsi_write_reg(DSI_RX_FIFO_VC_SIZE, r);
1714 static int dsi_force_tx_stop_mode_io(void)
1718 r = dsi_read_reg(DSI_TIMING1);
1719 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
1720 dsi_write_reg(DSI_TIMING1, r);
1722 if (wait_for_bit_change(DSI_TIMING1, 15, 0) != 0) {
1723 DSSERR("TX_STOP bit not going down\n");
1730 static int dsi_vc_enable(int channel, bool enable)
1732 DSSDBG("dsi_vc_enable channel %d, enable %d\n",
1735 enable = enable ? 1 : 0;
1737 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 0, 0);
1739 if (wait_for_bit_change(DSI_VC_CTRL(channel), 0, enable) != enable) {
1740 DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
1747 static void dsi_vc_initial_config(int channel)
1751 DSSDBGF("%d", channel);
1753 r = dsi_read_reg(DSI_VC_CTRL(channel));
1755 if (FLD_GET(r, 15, 15)) /* VC_BUSY */
1756 DSSERR("VC(%d) busy when trying to configure it!\n",
1759 r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
1760 r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
1761 r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
1762 r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
1763 r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
1764 r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
1765 r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
1767 r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
1768 r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
1770 dsi_write_reg(DSI_VC_CTRL(channel), r);
1772 dsi.vc[channel].mode = DSI_VC_MODE_L4;
1775 static int dsi_vc_config_l4(int channel)
1777 if (dsi.vc[channel].mode == DSI_VC_MODE_L4)
1780 DSSDBGF("%d", channel);
1782 dsi_vc_enable(channel, 0);
1785 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
1786 DSSERR("vc(%d) busy when trying to config for L4\n", channel);
1790 REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */
1792 dsi_vc_enable(channel, 1);
1794 dsi.vc[channel].mode = DSI_VC_MODE_L4;
1799 static int dsi_vc_config_vp(int channel)
1801 if (dsi.vc[channel].mode == DSI_VC_MODE_VP)
1804 DSSDBGF("%d", channel);
1806 dsi_vc_enable(channel, 0);
1809 if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
1810 DSSERR("vc(%d) busy when trying to config for VP\n", channel);
1814 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 1, 1); /* SOURCE, 1 = video port */
1816 dsi_vc_enable(channel, 1);
1818 dsi.vc[channel].mode = DSI_VC_MODE_VP;
1824 void omapdss_dsi_vc_enable_hs(int channel, bool enable)
1826 DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
1828 WARN_ON(!dsi_bus_is_locked());
1830 dsi_vc_enable(channel, 0);
1833 REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 9, 9);
1835 dsi_vc_enable(channel, 1);
1838 dsi_force_tx_stop_mode_io();
1840 EXPORT_SYMBOL(omapdss_dsi_vc_enable_hs);
1842 static void dsi_vc_flush_long_data(int channel)
1844 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
1846 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
1847 DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
1851 (val >> 24) & 0xff);
1855 static void dsi_show_rx_ack_with_err(u16 err)
1857 DSSERR("\tACK with ERROR (%#x):\n", err);
1859 DSSERR("\t\tSoT Error\n");
1861 DSSERR("\t\tSoT Sync Error\n");
1863 DSSERR("\t\tEoT Sync Error\n");
1865 DSSERR("\t\tEscape Mode Entry Command Error\n");
1867 DSSERR("\t\tLP Transmit Sync Error\n");
1869 DSSERR("\t\tHS Receive Timeout Error\n");
1871 DSSERR("\t\tFalse Control Error\n");
1873 DSSERR("\t\t(reserved7)\n");
1875 DSSERR("\t\tECC Error, single-bit (corrected)\n");
1877 DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
1878 if (err & (1 << 10))
1879 DSSERR("\t\tChecksum Error\n");
1880 if (err & (1 << 11))
1881 DSSERR("\t\tData type not recognized\n");
1882 if (err & (1 << 12))
1883 DSSERR("\t\tInvalid VC ID\n");
1884 if (err & (1 << 13))
1885 DSSERR("\t\tInvalid Transmission Length\n");
1886 if (err & (1 << 14))
1887 DSSERR("\t\t(reserved14)\n");
1888 if (err & (1 << 15))
1889 DSSERR("\t\tDSI Protocol Violation\n");
1892 static u16 dsi_vc_flush_receive_data(int channel)
1894 /* RX_FIFO_NOT_EMPTY */
1895 while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
1898 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
1899 DSSERR("\trawval %#08x\n", val);
1900 dt = FLD_GET(val, 5, 0);
1901 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
1902 u16 err = FLD_GET(val, 23, 8);
1903 dsi_show_rx_ack_with_err(err);
1904 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
1905 DSSERR("\tDCS short response, 1 byte: %#x\n",
1906 FLD_GET(val, 23, 8));
1907 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
1908 DSSERR("\tDCS short response, 2 byte: %#x\n",
1909 FLD_GET(val, 23, 8));
1910 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
1911 DSSERR("\tDCS long response, len %d\n",
1912 FLD_GET(val, 23, 8));
1913 dsi_vc_flush_long_data(channel);
1915 DSSERR("\tunknown datatype 0x%02x\n", dt);
1921 static int dsi_vc_send_bta(int channel)
1923 if (dsi.debug_write || dsi.debug_read)
1924 DSSDBG("dsi_vc_send_bta %d\n", channel);
1926 WARN_ON(!dsi_bus_is_locked());
1928 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
1929 DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
1930 dsi_vc_flush_receive_data(channel);
1933 REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
1938 int dsi_vc_send_bta_sync(int channel)
1943 INIT_COMPLETION(dsi.bta_completion);
1945 dsi_vc_enable_bta_irq(channel);
1947 r = dsi_vc_send_bta(channel);
1951 if (wait_for_completion_timeout(&dsi.bta_completion,
1952 msecs_to_jiffies(500)) == 0) {
1953 DSSERR("Failed to receive BTA\n");
1958 err = dsi_get_errors();
1960 DSSERR("Error while sending BTA: %x\n", err);
1965 dsi_vc_disable_bta_irq(channel);
1969 EXPORT_SYMBOL(dsi_vc_send_bta_sync);
1971 static inline void dsi_vc_write_long_header(int channel, u8 data_type,
1977 WARN_ON(!dsi_bus_is_locked());
1979 data_id = data_type | channel << 6;
1981 val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
1982 FLD_VAL(ecc, 31, 24);
1984 dsi_write_reg(DSI_VC_LONG_PACKET_HEADER(channel), val);
1987 static inline void dsi_vc_write_long_payload(int channel,
1988 u8 b1, u8 b2, u8 b3, u8 b4)
1992 val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
1994 /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
1995 b1, b2, b3, b4, val); */
1997 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
2000 static int dsi_vc_send_long(int channel, u8 data_type, u8 *data, u16 len,
2009 if (dsi.debug_write)
2010 DSSDBG("dsi_vc_send_long, %d bytes\n", len);
2013 if (dsi.vc[channel].fifo_size * 32 * 4 < len + 4) {
2014 DSSERR("unable to send long packet: packet too long.\n");
2018 dsi_vc_config_l4(channel);
2020 dsi_vc_write_long_header(channel, data_type, len, ecc);
2023 for (i = 0; i < len >> 2; i++) {
2024 if (dsi.debug_write)
2025 DSSDBG("\tsending full packet %d\n", i);
2032 dsi_vc_write_long_payload(channel, b1, b2, b3, b4);
2037 b1 = 0; b2 = 0; b3 = 0;
2039 if (dsi.debug_write)
2040 DSSDBG("\tsending remainder bytes %d\n", i);
2057 dsi_vc_write_long_payload(channel, b1, b2, b3, 0);
2063 static int dsi_vc_send_short(int channel, u8 data_type, u16 data, u8 ecc)
2068 WARN_ON(!dsi_bus_is_locked());
2070 if (dsi.debug_write)
2071 DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
2073 data_type, data & 0xff, (data >> 8) & 0xff);
2075 dsi_vc_config_l4(channel);
2077 if (FLD_GET(dsi_read_reg(DSI_VC_CTRL(channel)), 16, 16)) {
2078 DSSERR("ERROR FIFO FULL, aborting transfer\n");
2082 data_id = data_type | channel << 6;
2084 r = (data_id << 0) | (data << 8) | (ecc << 24);
2086 dsi_write_reg(DSI_VC_SHORT_PACKET_HEADER(channel), r);
2091 int dsi_vc_send_null(int channel)
2093 u8 nullpkg[] = {0, 0, 0, 0};
2094 return dsi_vc_send_long(channel, DSI_DT_NULL_PACKET, nullpkg, 4, 0);
2096 EXPORT_SYMBOL(dsi_vc_send_null);
2098 int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len)
2105 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_0,
2107 } else if (len == 2) {
2108 r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_1,
2109 data[0] | (data[1] << 8), 0);
2111 /* 0x39 = DCS Long Write */
2112 r = dsi_vc_send_long(channel, DSI_DT_DCS_LONG_WRITE,
2118 EXPORT_SYMBOL(dsi_vc_dcs_write_nosync);
2120 int dsi_vc_dcs_write(int channel, u8 *data, int len)
2124 r = dsi_vc_dcs_write_nosync(channel, data, len);
2128 r = dsi_vc_send_bta_sync(channel);
2132 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
2133 DSSERR("rx fifo not empty after write, dumping data:\n");
2134 dsi_vc_flush_receive_data(channel);
2141 DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
2142 channel, data[0], len);
2145 EXPORT_SYMBOL(dsi_vc_dcs_write);
2147 int dsi_vc_dcs_write_0(int channel, u8 dcs_cmd)
2149 return dsi_vc_dcs_write(channel, &dcs_cmd, 1);
2151 EXPORT_SYMBOL(dsi_vc_dcs_write_0);
2153 int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param)
2158 return dsi_vc_dcs_write(channel, buf, 2);
2160 EXPORT_SYMBOL(dsi_vc_dcs_write_1);
2162 int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
2169 DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %x)\n", channel, dcs_cmd);
2171 r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
2175 r = dsi_vc_send_bta_sync(channel);
2179 /* RX_FIFO_NOT_EMPTY */
2180 if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
2181 DSSERR("RX fifo empty when trying to read.\n");
2186 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2188 DSSDBG("\theader: %08x\n", val);
2189 dt = FLD_GET(val, 5, 0);
2190 if (dt == DSI_DT_RX_ACK_WITH_ERR) {
2191 u16 err = FLD_GET(val, 23, 8);
2192 dsi_show_rx_ack_with_err(err);
2196 } else if (dt == DSI_DT_RX_SHORT_READ_1) {
2197 u8 data = FLD_GET(val, 15, 8);
2199 DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
2209 } else if (dt == DSI_DT_RX_SHORT_READ_2) {
2210 u16 data = FLD_GET(val, 23, 8);
2212 DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
2219 buf[0] = data & 0xff;
2220 buf[1] = (data >> 8) & 0xff;
2223 } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
2225 int len = FLD_GET(val, 23, 8);
2227 DSSDBG("\tDCS long response, len %d\n", len);
2234 /* two byte checksum ends the packet, not included in len */
2235 for (w = 0; w < len + 2;) {
2237 val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
2239 DSSDBG("\t\t%02x %02x %02x %02x\n",
2243 (val >> 24) & 0xff);
2245 for (b = 0; b < 4; ++b) {
2247 buf[w] = (val >> (b * 8)) & 0xff;
2248 /* we discard the 2 byte checksum */
2255 DSSERR("\tunknown datatype 0x%02x\n", dt);
2262 DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
2267 EXPORT_SYMBOL(dsi_vc_dcs_read);
2269 int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
2273 r = dsi_vc_dcs_read(channel, dcs_cmd, data, 1);
2283 EXPORT_SYMBOL(dsi_vc_dcs_read_1);
2285 int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u8 *data1, u8 *data2)
2290 r = dsi_vc_dcs_read(channel, dcs_cmd, buf, 2);
2303 EXPORT_SYMBOL(dsi_vc_dcs_read_2);
2305 int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
2307 return dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
2310 EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
2312 static void dsi_set_lp_rx_timeout(unsigned ticks, bool x4, bool x16)
2315 unsigned long total_ticks;
2318 BUG_ON(ticks > 0x1fff);
2320 /* ticks in DSI_FCK */
2321 fck = dsi_fclk_rate();
2323 r = dsi_read_reg(DSI_TIMING2);
2324 r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
2325 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
2326 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
2327 r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
2328 dsi_write_reg(DSI_TIMING2, r);
2330 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2332 DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2334 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2335 (total_ticks * 1000) / (fck / 1000 / 1000));
2338 static void dsi_set_ta_timeout(unsigned ticks, bool x8, bool x16)
2341 unsigned long total_ticks;
2344 BUG_ON(ticks > 0x1fff);
2346 /* ticks in DSI_FCK */
2347 fck = dsi_fclk_rate();
2349 r = dsi_read_reg(DSI_TIMING1);
2350 r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
2351 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
2352 r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
2353 r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
2354 dsi_write_reg(DSI_TIMING1, r);
2356 total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
2358 DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
2360 ticks, x8 ? " x8" : "", x16 ? " x16" : "",
2361 (total_ticks * 1000) / (fck / 1000 / 1000));
2364 static void dsi_set_stop_state_counter(unsigned ticks, bool x4, bool x16)
2367 unsigned long total_ticks;
2370 BUG_ON(ticks > 0x1fff);
2372 /* ticks in DSI_FCK */
2373 fck = dsi_fclk_rate();
2375 r = dsi_read_reg(DSI_TIMING1);
2376 r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
2377 r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
2378 r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
2379 r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
2380 dsi_write_reg(DSI_TIMING1, r);
2382 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2384 DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
2386 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2387 (total_ticks * 1000) / (fck / 1000 / 1000));
2390 static void dsi_set_hs_tx_timeout(unsigned ticks, bool x4, bool x16)
2393 unsigned long total_ticks;
2396 BUG_ON(ticks > 0x1fff);
2398 /* ticks in TxByteClkHS */
2399 fck = dsi_get_txbyteclkhs();
2401 r = dsi_read_reg(DSI_TIMING2);
2402 r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
2403 r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
2404 r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
2405 r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
2406 dsi_write_reg(DSI_TIMING2, r);
2408 total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
2410 DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
2412 ticks, x4 ? " x4" : "", x16 ? " x16" : "",
2413 (total_ticks * 1000) / (fck / 1000 / 1000));
2415 static int dsi_proto_config(struct omap_dss_device *dssdev)
2420 dsi_config_tx_fifo(DSI_FIFO_SIZE_32,
2425 dsi_config_rx_fifo(DSI_FIFO_SIZE_32,
2430 /* XXX what values for the timeouts? */
2431 dsi_set_stop_state_counter(0x1000, false, false);
2432 dsi_set_ta_timeout(0x1fff, true, true);
2433 dsi_set_lp_rx_timeout(0x1fff, true, true);
2434 dsi_set_hs_tx_timeout(0x1fff, true, true);
2436 switch (dssdev->ctrl.pixel_size) {
2450 r = dsi_read_reg(DSI_CTRL);
2451 r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
2452 r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
2453 r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
2454 r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
2455 r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
2456 r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
2457 r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */
2458 r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
2459 r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
2460 r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
2461 r = FLD_MOD(r, 0, 25, 25); /* DCS_CMD_CODE, 1=start, 0=continue */
2463 dsi_write_reg(DSI_CTRL, r);
2465 dsi_vc_initial_config(0);
2466 dsi_vc_initial_config(1);
2467 dsi_vc_initial_config(2);
2468 dsi_vc_initial_config(3);
2473 static void dsi_proto_timings(struct omap_dss_device *dssdev)
2475 unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail;
2476 unsigned tclk_pre, tclk_post;
2477 unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
2478 unsigned ths_trail, ths_exit;
2479 unsigned ddr_clk_pre, ddr_clk_post;
2480 unsigned enter_hs_mode_lat, exit_hs_mode_lat;
2484 r = dsi_read_reg(DSI_DSIPHY_CFG0);
2485 ths_prepare = FLD_GET(r, 31, 24);
2486 ths_prepare_ths_zero = FLD_GET(r, 23, 16);
2487 ths_zero = ths_prepare_ths_zero - ths_prepare;
2488 ths_trail = FLD_GET(r, 15, 8);
2489 ths_exit = FLD_GET(r, 7, 0);
2491 r = dsi_read_reg(DSI_DSIPHY_CFG1);
2492 tlpx = FLD_GET(r, 22, 16) * 2;
2493 tclk_trail = FLD_GET(r, 15, 8);
2494 tclk_zero = FLD_GET(r, 7, 0);
2496 r = dsi_read_reg(DSI_DSIPHY_CFG2);
2497 tclk_prepare = FLD_GET(r, 7, 0);
2501 /* min 60ns + 52*UI */
2502 tclk_post = ns2ddr(60) + 26;
2504 /* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */
2505 if (dssdev->phy.dsi.data1_lane != 0 &&
2506 dssdev->phy.dsi.data2_lane != 0)
2511 ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
2513 ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
2515 BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
2516 BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
2518 r = dsi_read_reg(DSI_CLK_TIMING);
2519 r = FLD_MOD(r, ddr_clk_pre, 15, 8);
2520 r = FLD_MOD(r, ddr_clk_post, 7, 0);
2521 dsi_write_reg(DSI_CLK_TIMING, r);
2523 DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
2527 enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
2528 DIV_ROUND_UP(ths_prepare, 4) +
2529 DIV_ROUND_UP(ths_zero + 3, 4);
2531 exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
2533 r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
2534 FLD_VAL(exit_hs_mode_lat, 15, 0);
2535 dsi_write_reg(DSI_VM_TIMING7, r);
2537 DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
2538 enter_hs_mode_lat, exit_hs_mode_lat);
2542 #define DSI_DECL_VARS \
2543 int __dsi_cb = 0; u32 __dsi_cv = 0;
2545 #define DSI_FLUSH(ch) \
2546 if (__dsi_cb > 0) { \
2547 /*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \
2548 dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \
2549 __dsi_cb = __dsi_cv = 0; \
2552 #define DSI_PUSH(ch, data) \
2554 __dsi_cv |= (data) << (__dsi_cb * 8); \
2555 /*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \
2556 if (++__dsi_cb > 3) \
2560 static int dsi_update_screen_l4(struct omap_dss_device *dssdev,
2561 int x, int y, int w, int h)
2563 /* Note: supports only 24bit colors in 32bit container */
2565 int fifo_stalls = 0;
2566 int max_dsi_packet_size;
2567 int max_data_per_packet;
2568 int max_pixels_per_packet;
2570 int bytespp = dssdev->ctrl.pixel_size / 8;
2576 struct omap_overlay *ovl;
2580 DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n",
2583 ovl = dssdev->manager->overlays[0];
2585 if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U)
2588 if (dssdev->ctrl.pixel_size != 24)
2591 scr_width = ovl->info.screen_width;
2592 data = ovl->info.vaddr;
2594 start_offset = scr_width * y + x;
2595 horiz_inc = scr_width - w;
2598 /* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes
2601 /* When using CPU, max long packet size is TX buffer size */
2602 max_dsi_packet_size = dsi.vc[0].fifo_size * 32 * 4;
2604 /* we seem to get better perf if we divide the tx fifo to half,
2605 and while the other half is being sent, we fill the other half
2606 max_dsi_packet_size /= 2; */
2608 max_data_per_packet = max_dsi_packet_size - 4 - 1;
2610 max_pixels_per_packet = max_data_per_packet / bytespp;
2612 DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet);
2614 pixels_left = w * h;
2616 DSSDBG("total pixels %d\n", pixels_left);
2618 data += start_offset;
2620 while (pixels_left > 0) {
2621 /* 0x2c = write_memory_start */
2622 /* 0x3c = write_memory_continue */
2623 u8 dcs_cmd = first ? 0x2c : 0x3c;
2629 /* using fifo not empty */
2630 /* TX_FIFO_NOT_EMPTY */
2631 while (FLD_GET(dsi_read_reg(DSI_VC_CTRL(0)), 5, 5)) {
2633 if (fifo_stalls > 0xfffff) {
2634 DSSERR("fifo stalls overflow, pixels left %d\n",
2642 /* using fifo emptiness */
2643 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 <
2644 max_dsi_packet_size) {
2646 if (fifo_stalls > 0xfffff) {
2647 DSSERR("fifo stalls overflow, pixels left %d\n",
2654 while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 == 0) {
2656 if (fifo_stalls > 0xfffff) {
2657 DSSERR("fifo stalls overflow, pixels left %d\n",
2664 pixels = min(max_pixels_per_packet, pixels_left);
2666 pixels_left -= pixels;
2668 dsi_vc_write_long_header(0, DSI_DT_DCS_LONG_WRITE,
2669 1 + pixels * bytespp, 0);
2671 DSI_PUSH(0, dcs_cmd);
2673 while (pixels-- > 0) {
2674 u32 pix = __raw_readl(data++);
2676 DSI_PUSH(0, (pix >> 16) & 0xff);
2677 DSI_PUSH(0, (pix >> 8) & 0xff);
2678 DSI_PUSH(0, (pix >> 0) & 0xff);
2681 if (current_x == x+w) {
2693 static void dsi_update_screen_dispc(struct omap_dss_device *dssdev,
2694 u16 x, u16 y, u16 w, u16 h)
2700 unsigned packet_payload;
2701 unsigned packet_len;
2704 const unsigned channel = dsi.update_channel;
2705 /* line buffer is 1024 x 24bits */
2706 /* XXX: for some reason using full buffer size causes considerable TX
2707 * slowdown with update sizes that fill the whole buffer */
2708 const unsigned line_buf_size = 1023 * 3;
2710 DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
2713 dsi_vc_config_vp(channel);
2715 bytespp = dssdev->ctrl.pixel_size / 8;
2716 bytespl = w * bytespp;
2717 bytespf = bytespl * h;
2719 /* NOTE: packet_payload has to be equal to N * bytespl, where N is
2720 * number of lines in a packet. See errata about VP_CLK_RATIO */
2722 if (bytespf < line_buf_size)
2723 packet_payload = bytespf;
2725 packet_payload = (line_buf_size) / bytespl * bytespl;
2727 packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
2728 total_len = (bytespf / packet_payload) * packet_len;
2730 if (bytespf % packet_payload)
2731 total_len += (bytespf % packet_payload) + 1;
2733 l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
2734 dsi_write_reg(DSI_VC_TE(channel), l);
2736 dsi_vc_write_long_header(channel, DSI_DT_DCS_LONG_WRITE, packet_len, 0);
2739 l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
2741 l = FLD_MOD(l, 1, 31, 31); /* TE_START */
2742 dsi_write_reg(DSI_VC_TE(channel), l);
2744 /* We put SIDLEMODE to no-idle for the duration of the transfer,
2745 * because DSS interrupts are not capable of waking up the CPU and the
2746 * framedone interrupt could be delayed for quite a long time. I think
2747 * the same goes for any DSS interrupts, but for some reason I have not
2748 * seen the problem anywhere else than here.
2750 dispc_disable_sidle();
2752 dsi_perf_mark_start();
2754 r = queue_delayed_work(dsi.workqueue, &dsi.framedone_timeout_work,
2755 msecs_to_jiffies(250));
2758 dss_start_update(dssdev);
2760 if (dsi.te_enabled) {
2761 /* disable LP_RX_TO, so that we can receive TE. Time to wait
2762 * for TE is longer than the timer allows */
2763 REG_FLD_MOD(DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
2765 dsi_vc_send_bta(channel);
2767 #ifdef DSI_CATCH_MISSING_TE
2768 mod_timer(&dsi.te_timer, jiffies + msecs_to_jiffies(250));
2773 #ifdef DSI_CATCH_MISSING_TE
2774 static void dsi_te_timeout(unsigned long arg)
2776 DSSERR("TE not received for 250ms!\n");
2780 static void dsi_handle_framedone(int error)
2782 const int channel = dsi.update_channel;
2784 cancel_delayed_work(&dsi.framedone_timeout_work);
2786 dsi_vc_disable_bta_irq(channel);
2788 /* SIDLEMODE back to smart-idle */
2789 dispc_enable_sidle();
2791 dsi.bta_callback = NULL;
2793 if (dsi.te_enabled) {
2794 /* enable LP_RX_TO again after the TE */
2795 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
2798 /* RX_FIFO_NOT_EMPTY */
2799 if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
2800 DSSERR("Received error during frame transfer:\n");
2801 dsi_vc_flush_receive_data(channel);
2806 dsi.framedone_callback(error, dsi.framedone_data);
2809 dsi_perf_show("DISPC");
2812 static void dsi_framedone_timeout_work_callback(struct work_struct *work)
2814 /* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
2815 * 250ms which would conflict with this timeout work. What should be
2816 * done is first cancel the transfer on the HW, and then cancel the
2817 * possibly scheduled framedone work. However, cancelling the transfer
2818 * on the HW is buggy, and would probably require resetting the whole
2821 DSSERR("Framedone not received for 250ms!\n");
2823 dsi_handle_framedone(-ETIMEDOUT);
2826 static void dsi_framedone_bta_callback(void)
2828 dsi_handle_framedone(0);
2830 #ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
2831 dispc_fake_vsync_irq();
2835 static void dsi_framedone_irq_callback(void *data, u32 mask)
2837 const int channel = dsi.update_channel;
2840 /* Note: We get FRAMEDONE when DISPC has finished sending pixels and
2841 * turns itself off. However, DSI still has the pixels in its buffers,
2842 * and is sending the data.
2845 if (dsi.te_enabled) {
2846 /* enable LP_RX_TO again after the TE */
2847 REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
2850 /* Send BTA after the frame. We need this for the TE to work, as TE
2851 * trigger is only sent for BTAs without preceding packet. Thus we need
2852 * to BTA after the pixel packets so that next BTA will cause TE
2855 * This is not needed when TE is not in use, but we do it anyway to
2856 * make sure that the transfer has been completed. It would be more
2857 * optimal, but more complex, to wait only just before starting next
2860 * Also, as there's no interrupt telling when the transfer has been
2861 * done and the channel could be reconfigured, the only way is to
2862 * busyloop until TE_SIZE is zero. With BTA we can do this
2866 dsi.bta_callback = dsi_framedone_bta_callback;
2870 dsi_vc_enable_bta_irq(channel);
2872 r = dsi_vc_send_bta(channel);
2874 DSSERR("BTA after framedone failed\n");
2875 dsi_handle_framedone(-EIO);
2879 int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
2880 u16 *x, u16 *y, u16 *w, u16 *h,
2881 bool enlarge_update_area)
2885 dssdev->driver->get_resolution(dssdev, &dw, &dh);
2887 if (*x > dw || *y > dh)
2899 if (*w == 0 || *h == 0)
2902 dsi_perf_mark_setup();
2904 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
2905 dss_setup_partial_planes(dssdev, x, y, w, h,
2906 enlarge_update_area);
2907 dispc_set_lcd_size(dssdev->manager->id, *w, *h);
2912 EXPORT_SYMBOL(omap_dsi_prepare_update);
2914 int omap_dsi_update(struct omap_dss_device *dssdev,
2916 u16 x, u16 y, u16 w, u16 h,
2917 void (*callback)(int, void *), void *data)
2919 dsi.update_channel = channel;
2921 /* OMAP DSS cannot send updates of odd widths.
2922 * omap_dsi_prepare_update() makes the widths even, but add a BUG_ON
2923 * here to make sure we catch erroneous updates. Otherwise we'll only
2924 * see rather obscure HW error happening, as DSS halts. */
2927 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
2928 dsi.framedone_callback = callback;
2929 dsi.framedone_data = data;
2931 dsi.update_region.x = x;
2932 dsi.update_region.y = y;
2933 dsi.update_region.w = w;
2934 dsi.update_region.h = h;
2935 dsi.update_region.device = dssdev;
2937 dsi_update_screen_dispc(dssdev, x, y, w, h);
2941 r = dsi_update_screen_l4(dssdev, x, y, w, h);
2945 dsi_perf_show("L4");
2951 EXPORT_SYMBOL(omap_dsi_update);
2955 static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
2959 r = omap_dispc_register_isr(dsi_framedone_irq_callback, NULL,
2960 DISPC_IRQ_FRAMEDONE);
2962 DSSERR("can't get FRAMEDONE irq\n");
2966 dispc_set_lcd_display_type(dssdev->manager->id,
2967 OMAP_DSS_LCD_DISPLAY_TFT);
2969 dispc_set_parallel_interface_mode(dssdev->manager->id,
2970 OMAP_DSS_PARALLELMODE_DSI);
2971 dispc_enable_fifohandcheck(dssdev->manager->id, 1);
2973 dispc_set_tft_data_lines(dssdev->manager->id, dssdev->ctrl.pixel_size);
2976 struct omap_video_timings timings = {
2985 dispc_set_lcd_timings(dssdev->manager->id, &timings);
2991 static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev)
2993 omap_dispc_unregister_isr(dsi_framedone_irq_callback, NULL,
2994 DISPC_IRQ_FRAMEDONE);
2997 static int dsi_configure_dsi_clocks(struct omap_dss_device *dssdev)
2999 struct dsi_clock_info cinfo;
3002 /* we always use DSS2_FCK as input clock */
3003 cinfo.use_dss2_fck = true;
3004 cinfo.regn = dssdev->phy.dsi.div.regn;
3005 cinfo.regm = dssdev->phy.dsi.div.regm;
3006 cinfo.regm3 = dssdev->phy.dsi.div.regm3;
3007 cinfo.regm4 = dssdev->phy.dsi.div.regm4;
3008 r = dsi_calc_clock_rates(dssdev, &cinfo);
3010 DSSERR("Failed to calc dsi clocks\n");
3014 r = dsi_pll_set_clock_div(&cinfo);
3016 DSSERR("Failed to set dsi clocks\n");
3023 static int dsi_configure_dispc_clocks(struct omap_dss_device *dssdev)
3025 struct dispc_clock_info dispc_cinfo;
3027 unsigned long long fck;
3029 fck = dsi_get_dsi1_pll_rate();
3031 dispc_cinfo.lck_div = dssdev->phy.dsi.div.lck_div;
3032 dispc_cinfo.pck_div = dssdev->phy.dsi.div.pck_div;
3034 r = dispc_calc_clock_rates(fck, &dispc_cinfo);
3036 DSSERR("Failed to calc dispc clocks\n");
3040 r = dispc_set_clock_div(dssdev->manager->id, &dispc_cinfo);
3042 DSSERR("Failed to set dispc clocks\n");
3049 static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
3053 _dsi_print_reset_status();
3055 r = dsi_pll_init(dssdev, true, true);
3059 r = dsi_configure_dsi_clocks(dssdev);
3063 dss_select_dispc_clk_source(DSS_SRC_DSI1_PLL_FCLK);
3064 dss_select_dsi_clk_source(DSS_SRC_DSI2_PLL_FCLK);
3068 r = dsi_configure_dispc_clocks(dssdev);
3072 r = dsi_complexio_init(dssdev);
3076 _dsi_print_reset_status();
3078 dsi_proto_timings(dssdev);
3079 dsi_set_lp_clk_divisor(dssdev);
3082 _dsi_print_reset_status();
3084 r = dsi_proto_config(dssdev);
3088 /* enable interface */
3089 dsi_vc_enable(0, 1);
3090 dsi_vc_enable(1, 1);
3091 dsi_vc_enable(2, 1);
3092 dsi_vc_enable(3, 1);
3094 dsi_force_tx_stop_mode_io();
3098 dsi_complexio_uninit();
3100 dss_select_dispc_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
3101 dss_select_dsi_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
3108 static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev)
3110 /* disable interface */
3112 dsi_vc_enable(0, 0);
3113 dsi_vc_enable(1, 0);
3114 dsi_vc_enable(2, 0);
3115 dsi_vc_enable(3, 0);
3117 dss_select_dispc_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
3118 dss_select_dsi_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
3119 dsi_complexio_uninit();
3123 static int dsi_core_init(void)
3126 REG_FLD_MOD(DSI_SYSCONFIG, 1, 0, 0);
3129 REG_FLD_MOD(DSI_SYSCONFIG, 1, 2, 2);
3131 /* SIDLEMODE smart-idle */
3132 REG_FLD_MOD(DSI_SYSCONFIG, 2, 4, 3);
3134 _dsi_initialize_irq();
3139 int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
3143 DSSDBG("dsi_display_enable\n");
3145 WARN_ON(!dsi_bus_is_locked());
3147 mutex_lock(&dsi.lock);
3149 r = omap_dss_start_device(dssdev);
3151 DSSERR("failed to start device\n");
3156 dsi_enable_pll_clock(1);
3164 r = dsi_display_init_dispc(dssdev);
3168 r = dsi_display_init_dsi(dssdev);
3172 mutex_unlock(&dsi.lock);
3177 dsi_display_uninit_dispc(dssdev);
3180 dsi_enable_pll_clock(0);
3181 omap_dss_stop_device(dssdev);
3183 mutex_unlock(&dsi.lock);
3184 DSSDBG("dsi_display_enable FAILED\n");
3187 EXPORT_SYMBOL(omapdss_dsi_display_enable);
3189 void omapdss_dsi_display_disable(struct omap_dss_device *dssdev)
3191 DSSDBG("dsi_display_disable\n");
3193 WARN_ON(!dsi_bus_is_locked());
3195 mutex_lock(&dsi.lock);
3197 dsi_display_uninit_dispc(dssdev);
3199 dsi_display_uninit_dsi(dssdev);
3202 dsi_enable_pll_clock(0);
3204 omap_dss_stop_device(dssdev);
3206 mutex_unlock(&dsi.lock);
3208 EXPORT_SYMBOL(omapdss_dsi_display_disable);
3210 int omapdss_dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
3212 dsi.te_enabled = enable;
3215 EXPORT_SYMBOL(omapdss_dsi_enable_te);
3217 void dsi_get_overlay_fifo_thresholds(enum omap_plane plane,
3218 u32 fifo_size, enum omap_burst_size *burst_size,
3219 u32 *fifo_low, u32 *fifo_high)
3221 unsigned burst_size_bytes;
3223 *burst_size = OMAP_DSS_BURST_16x32;
3224 burst_size_bytes = 16 * 32 / 8;
3226 *fifo_high = fifo_size - burst_size_bytes;
3227 *fifo_low = fifo_size - burst_size_bytes * 2;
3230 int dsi_init_display(struct omap_dss_device *dssdev)
3232 DSSDBG("DSI init\n");
3234 /* XXX these should be figured out dynamically */
3235 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
3236 OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
3238 dsi.vc[0].dssdev = dssdev;
3239 dsi.vc[1].dssdev = dssdev;
3244 void dsi_wait_dsi1_pll_active(void)
3246 if (wait_for_bit_change(DSI_PLL_STATUS, 7, 1) != 1)
3247 DSSERR("DSI1 PLL clock not active\n");
3250 void dsi_wait_dsi2_pll_active(void)
3252 if (wait_for_bit_change(DSI_PLL_STATUS, 8, 1) != 1)
3253 DSSERR("DSI2 PLL clock not active\n");
3256 static int dsi_init(struct platform_device *pdev)
3261 spin_lock_init(&dsi.errors_lock);
3264 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
3265 spin_lock_init(&dsi.irq_stats_lock);
3266 dsi.irq_stats.last_reset = jiffies;
3269 init_completion(&dsi.bta_completion);
3271 mutex_init(&dsi.lock);
3272 sema_init(&dsi.bus_lock, 1);
3274 dsi.workqueue = create_singlethread_workqueue("dsi");
3275 if (dsi.workqueue == NULL)
3278 INIT_DELAYED_WORK_DEFERRABLE(&dsi.framedone_timeout_work,
3279 dsi_framedone_timeout_work_callback);
3281 #ifdef DSI_CATCH_MISSING_TE
3282 init_timer(&dsi.te_timer);
3283 dsi.te_timer.function = dsi_te_timeout;
3284 dsi.te_timer.data = 0;
3286 dsi.base = ioremap(DSI_BASE, DSI_SZ_REGS);
3288 DSSERR("can't ioremap DSI\n");
3293 dsi.vdds_dsi_reg = dsi_get_vdds_dsi();
3294 if (IS_ERR(dsi.vdds_dsi_reg)) {
3295 DSSERR("can't get VDDS_DSI regulator\n");
3296 r = PTR_ERR(dsi.vdds_dsi_reg);
3302 rev = dsi_read_reg(DSI_REVISION);
3303 printk(KERN_INFO "OMAP DSI rev %d.%d\n",
3304 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
3312 destroy_workqueue(dsi.workqueue);
3316 static void dsi_exit(void)
3318 if (dsi.vdds_dsi_reg != NULL) {
3319 regulator_put(dsi.vdds_dsi_reg);
3320 dsi.vdds_dsi_reg = NULL;
3325 destroy_workqueue(dsi.workqueue);
3327 DSSDBG("omap_dsi_exit\n");
3330 /* DSI1 HW IP initialisation */
3331 static int omap_dsi1hw_probe(struct platform_device *pdev)
3337 DSSERR("Failed to initialize DSI\n");
3344 static int omap_dsi1hw_remove(struct platform_device *pdev)
3350 static struct platform_driver omap_dsi1hw_driver = {
3351 .probe = omap_dsi1hw_probe,
3352 .remove = omap_dsi1hw_remove,
3354 .name = "omapdss_dsi1",
3355 .owner = THIS_MODULE,
3359 int dsi_init_platform_driver(void)
3361 return platform_driver_register(&omap_dsi1hw_driver);
3364 void dsi_uninit_platform_driver(void)
3366 return platform_driver_unregister(&omap_dsi1hw_driver);