q3k/linux
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
linux/drivers/video/omap2/dss/dsi.c
Tomi Valkeinen 36194b4792 OMAP: DSS2: DSI: increase FIFO low threshold 
The current FIFO low threshold was too low, and caused the FIFO to run
empty when core domain went to INA state between FIFO fills. This patch
increases the low threshold to keep that from happening.

The threshold values depend quite much on the HW and the use cases, so
this should actually be somehow configurable from board files, perhaps.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
2010-08-05 16:52:05 +03:00

3296 lines
75 KiB
C
Raw Blame History

/*
* linux/drivers/video/omap2/dss/dsi.c
*
* Copyright (C) 2009 Nokia Corporation
* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define DSS_SUBSYS_NAME "DSI"
#include <linux/kernel.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/semaphore.h>
#include <linux/seq_file.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <plat/display.h>
#include <plat/clock.h>
#include "dss.h"
/*#define VERBOSE_IRQ*/
#define DSI_CATCH_MISSING_TE
#define DSI_BASE 0x4804FC00
struct dsi_reg { u16 idx; };
#define DSI_REG(idx) ((const struct dsi_reg) { idx })
#define DSI_SZ_REGS SZ_1K
/* DSI Protocol Engine */
#define DSI_REVISION DSI_REG(0x0000)
#define DSI_SYSCONFIG DSI_REG(0x0010)
#define DSI_SYSSTATUS DSI_REG(0x0014)
#define DSI_IRQSTATUS DSI_REG(0x0018)
#define DSI_IRQENABLE DSI_REG(0x001C)
#define DSI_CTRL DSI_REG(0x0040)
#define DSI_COMPLEXIO_CFG1 DSI_REG(0x0048)
#define DSI_COMPLEXIO_IRQ_STATUS DSI_REG(0x004C)
#define DSI_COMPLEXIO_IRQ_ENABLE DSI_REG(0x0050)
#define DSI_CLK_CTRL DSI_REG(0x0054)
#define DSI_TIMING1 DSI_REG(0x0058)
#define DSI_TIMING2 DSI_REG(0x005C)
#define DSI_VM_TIMING1 DSI_REG(0x0060)
#define DSI_VM_TIMING2 DSI_REG(0x0064)
#define DSI_VM_TIMING3 DSI_REG(0x0068)
#define DSI_CLK_TIMING DSI_REG(0x006C)
#define DSI_TX_FIFO_VC_SIZE DSI_REG(0x0070)
#define DSI_RX_FIFO_VC_SIZE DSI_REG(0x0074)
#define DSI_COMPLEXIO_CFG2 DSI_REG(0x0078)
#define DSI_RX_FIFO_VC_FULLNESS DSI_REG(0x007C)
#define DSI_VM_TIMING4 DSI_REG(0x0080)
#define DSI_TX_FIFO_VC_EMPTINESS DSI_REG(0x0084)
#define DSI_VM_TIMING5 DSI_REG(0x0088)
#define DSI_VM_TIMING6 DSI_REG(0x008C)
#define DSI_VM_TIMING7 DSI_REG(0x0090)
#define DSI_STOPCLK_TIMING DSI_REG(0x0094)
#define DSI_VC_CTRL(n) DSI_REG(0x0100 + (n * 0x20))
#define DSI_VC_TE(n) DSI_REG(0x0104 + (n * 0x20))
#define DSI_VC_LONG_PACKET_HEADER(n) DSI_REG(0x0108 + (n * 0x20))
#define DSI_VC_LONG_PACKET_PAYLOAD(n) DSI_REG(0x010C + (n * 0x20))
#define DSI_VC_SHORT_PACKET_HEADER(n) DSI_REG(0x0110 + (n * 0x20))
#define DSI_VC_IRQSTATUS(n) DSI_REG(0x0118 + (n * 0x20))
#define DSI_VC_IRQENABLE(n) DSI_REG(0x011C + (n * 0x20))
/* DSIPHY_SCP */
#define DSI_DSIPHY_CFG0 DSI_REG(0x200 + 0x0000)
#define DSI_DSIPHY_CFG1 DSI_REG(0x200 + 0x0004)
#define DSI_DSIPHY_CFG2 DSI_REG(0x200 + 0x0008)
#define DSI_DSIPHY_CFG5 DSI_REG(0x200 + 0x0014)
/* DSI_PLL_CTRL_SCP */
#define DSI_PLL_CONTROL DSI_REG(0x300 + 0x0000)
#define DSI_PLL_STATUS DSI_REG(0x300 + 0x0004)
#define DSI_PLL_GO DSI_REG(0x300 + 0x0008)
#define DSI_PLL_CONFIGURATION1 DSI_REG(0x300 + 0x000C)
#define DSI_PLL_CONFIGURATION2 DSI_REG(0x300 + 0x0010)
#define REG_GET(idx, start, end) \
FLD_GET(dsi_read_reg(idx), start, end)
#define REG_FLD_MOD(idx, val, start, end) \
dsi_write_reg(idx, FLD_MOD(dsi_read_reg(idx), val, start, end))
/* Global interrupts */
#define DSI_IRQ_VC0 (1 << 0)
#define DSI_IRQ_VC1 (1 << 1)
#define DSI_IRQ_VC2 (1 << 2)
#define DSI_IRQ_VC3 (1 << 3)
#define DSI_IRQ_WAKEUP (1 << 4)
#define DSI_IRQ_RESYNC (1 << 5)
#define DSI_IRQ_PLL_LOCK (1 << 7)
#define DSI_IRQ_PLL_UNLOCK (1 << 8)
#define DSI_IRQ_PLL_RECALL (1 << 9)
#define DSI_IRQ_COMPLEXIO_ERR (1 << 10)
#define DSI_IRQ_HS_TX_TIMEOUT (1 << 14)
#define DSI_IRQ_LP_RX_TIMEOUT (1 << 15)
#define DSI_IRQ_TE_TRIGGER (1 << 16)
#define DSI_IRQ_ACK_TRIGGER (1 << 17)
#define DSI_IRQ_SYNC_LOST (1 << 18)
#define DSI_IRQ_LDO_POWER_GOOD (1 << 19)
#define DSI_IRQ_TA_TIMEOUT (1 << 20)
#define DSI_IRQ_ERROR_MASK \
(DSI_IRQ_HS_TX_TIMEOUT | DSI_IRQ_LP_RX_TIMEOUT | DSI_IRQ_SYNC_LOST | \
DSI_IRQ_TA_TIMEOUT)
#define DSI_IRQ_CHANNEL_MASK 0xf
/* Virtual channel interrupts */
#define DSI_VC_IRQ_CS (1 << 0)
#define DSI_VC_IRQ_ECC_CORR (1 << 1)
#define DSI_VC_IRQ_PACKET_SENT (1 << 2)
#define DSI_VC_IRQ_FIFO_TX_OVF (1 << 3)
#define DSI_VC_IRQ_FIFO_RX_OVF (1 << 4)
#define DSI_VC_IRQ_BTA (1 << 5)
#define DSI_VC_IRQ_ECC_NO_CORR (1 << 6)
#define DSI_VC_IRQ_FIFO_TX_UDF (1 << 7)
#define DSI_VC_IRQ_PP_BUSY_CHANGE (1 << 8)
#define DSI_VC_IRQ_ERROR_MASK \
(DSI_VC_IRQ_CS | DSI_VC_IRQ_ECC_CORR | DSI_VC_IRQ_FIFO_TX_OVF | \
DSI_VC_IRQ_FIFO_RX_OVF | DSI_VC_IRQ_ECC_NO_CORR | \
DSI_VC_IRQ_FIFO_TX_UDF)
/* ComplexIO interrupts */
#define DSI_CIO_IRQ_ERRSYNCESC1 (1 << 0)
#define DSI_CIO_IRQ_ERRSYNCESC2 (1 << 1)
#define DSI_CIO_IRQ_ERRSYNCESC3 (1 << 2)
#define DSI_CIO_IRQ_ERRESC1 (1 << 5)
#define DSI_CIO_IRQ_ERRESC2 (1 << 6)
#define DSI_CIO_IRQ_ERRESC3 (1 << 7)
#define DSI_CIO_IRQ_ERRCONTROL1 (1 << 10)
#define DSI_CIO_IRQ_ERRCONTROL2 (1 << 11)
#define DSI_CIO_IRQ_ERRCONTROL3 (1 << 12)
#define DSI_CIO_IRQ_STATEULPS1 (1 << 15)
#define DSI_CIO_IRQ_STATEULPS2 (1 << 16)
#define DSI_CIO_IRQ_STATEULPS3 (1 << 17)
#define DSI_CIO_IRQ_ERRCONTENTIONLP0_1 (1 << 20)
#define DSI_CIO_IRQ_ERRCONTENTIONLP1_1 (1 << 21)
#define DSI_CIO_IRQ_ERRCONTENTIONLP0_2 (1 << 22)
#define DSI_CIO_IRQ_ERRCONTENTIONLP1_2 (1 << 23)
#define DSI_CIO_IRQ_ERRCONTENTIONLP0_3 (1 << 24)
#define DSI_CIO_IRQ_ERRCONTENTIONLP1_3 (1 << 25)
#define DSI_CIO_IRQ_ULPSACTIVENOT_ALL0 (1 << 30)
#define DSI_CIO_IRQ_ULPSACTIVENOT_ALL1 (1 << 31)
#define DSI_CIO_IRQ_ERROR_MASK \
(DSI_CIO_IRQ_ERRSYNCESC1 | DSI_CIO_IRQ_ERRSYNCESC2 | \
DSI_CIO_IRQ_ERRSYNCESC3 | DSI_CIO_IRQ_ERRESC1 | DSI_CIO_IRQ_ERRESC2 | \
DSI_CIO_IRQ_ERRESC3 | DSI_CIO_IRQ_ERRCONTROL1 | \
DSI_CIO_IRQ_ERRCONTROL2 | DSI_CIO_IRQ_ERRCONTROL3 | \
DSI_CIO_IRQ_ERRCONTENTIONLP0_1 | DSI_CIO_IRQ_ERRCONTENTIONLP1_1 | \
DSI_CIO_IRQ_ERRCONTENTIONLP0_2 | DSI_CIO_IRQ_ERRCONTENTIONLP1_2 | \
DSI_CIO_IRQ_ERRCONTENTIONLP0_3 | DSI_CIO_IRQ_ERRCONTENTIONLP1_3)
#define DSI_DT_DCS_SHORT_WRITE_0 0x05
#define DSI_DT_DCS_SHORT_WRITE_1 0x15
#define DSI_DT_DCS_READ 0x06
#define DSI_DT_SET_MAX_RET_PKG_SIZE 0x37
#define DSI_DT_NULL_PACKET 0x09
#define DSI_DT_DCS_LONG_WRITE 0x39
#define DSI_DT_RX_ACK_WITH_ERR 0x02
#define DSI_DT_RX_DCS_LONG_READ 0x1c
#define DSI_DT_RX_SHORT_READ_1 0x21
#define DSI_DT_RX_SHORT_READ_2 0x22
#define FINT_MAX 2100000
#define FINT_MIN 750000
#define REGN_MAX (1 << 7)
#define REGM_MAX ((1 << 11) - 1)
#define REGM3_MAX (1 << 4)
#define REGM4_MAX (1 << 4)
#define LP_DIV_MAX ((1 << 13) - 1)
enum fifo_size {
DSI_FIFO_SIZE_0 = 0,
DSI_FIFO_SIZE_32 = 1,
DSI_FIFO_SIZE_64 = 2,
DSI_FIFO_SIZE_96 = 3,
DSI_FIFO_SIZE_128 = 4,
};
enum dsi_vc_mode {
DSI_VC_MODE_L4 = 0,
DSI_VC_MODE_VP,
};
struct dsi_update_region {
u16 x, y, w, h;
struct omap_dss_device *device;
};
struct dsi_irq_stats {
unsigned long last_reset;
unsigned irq_count;
unsigned dsi_irqs[32];
unsigned vc_irqs[4][32];
unsigned cio_irqs[32];
};
static struct
{
void __iomem *base;
struct dsi_clock_info current_cinfo;
struct regulator *vdds_dsi_reg;
struct {
enum dsi_vc_mode mode;
struct omap_dss_device *dssdev;
enum fifo_size fifo_size;
} vc[4];
struct mutex lock;
struct semaphore bus_lock;
unsigned pll_locked;
struct completion bta_completion;
void (*bta_callback)(void);
int update_channel;
struct dsi_update_region update_region;
bool te_enabled;
struct workqueue_struct *workqueue;
void (*framedone_callback)(int, void *);
void *framedone_data;
struct delayed_work framedone_timeout_work;
#ifdef DSI_CATCH_MISSING_TE
struct timer_list te_timer;
#endif
unsigned long cache_req_pck;
unsigned long cache_clk_freq;
struct dsi_clock_info cache_cinfo;
u32 errors;
spinlock_t errors_lock;
#ifdef DEBUG
ktime_t perf_setup_time;
ktime_t perf_start_time;
#endif
int debug_read;
int debug_write;
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
spinlock_t irq_stats_lock;
struct dsi_irq_stats irq_stats;
#endif
} dsi;
#ifdef DEBUG
static unsigned int dsi_perf;
module_param_named(dsi_perf, dsi_perf, bool, 0644);
#endif
static inline void dsi_write_reg(const struct dsi_reg idx, u32 val)
{
__raw_writel(val, dsi.base + idx.idx);
}
static inline u32 dsi_read_reg(const struct dsi_reg idx)
{
return __raw_readl(dsi.base + idx.idx);
}
void dsi_save_context(void)
{
}
void dsi_restore_context(void)
{
}
void dsi_bus_lock(void)
{
down(&dsi.bus_lock);
}
EXPORT_SYMBOL(dsi_bus_lock);
void dsi_bus_unlock(void)
{
up(&dsi.bus_lock);
}
EXPORT_SYMBOL(dsi_bus_unlock);
static bool dsi_bus_is_locked(void)
{
return dsi.bus_lock.count == 0;
}
static inline int wait_for_bit_change(const struct dsi_reg idx, int bitnum,
int value)
{
int t = 100000;
while (REG_GET(idx, bitnum, bitnum) != value) {
if (--t == 0)
return !value;
}
return value;
}
#ifdef DEBUG
static void dsi_perf_mark_setup(void)
{
dsi.perf_setup_time = ktime_get();
}
static void dsi_perf_mark_start(void)
{
dsi.perf_start_time = ktime_get();
}
static void dsi_perf_show(const char *name)
{
ktime_t t, setup_time, trans_time;
u32 total_bytes;
u32 setup_us, trans_us, total_us;
if (!dsi_perf)
return;
t = ktime_get();
setup_time = ktime_sub(dsi.perf_start_time, dsi.perf_setup_time);
setup_us = (u32)ktime_to_us(setup_time);
if (setup_us == 0)
setup_us = 1;
trans_time = ktime_sub(t, dsi.perf_start_time);
trans_us = (u32)ktime_to_us(trans_time);
if (trans_us == 0)
trans_us = 1;
total_us = setup_us + trans_us;
total_bytes = dsi.update_region.w *
dsi.update_region.h *
dsi.update_region.device->ctrl.pixel_size / 8;
printk(KERN_INFO "DSI(%s): %u us + %u us = %u us (%uHz), "
"%u bytes, %u kbytes/sec\n",
name,
setup_us,
trans_us,
total_us,
1000*1000 / total_us,
total_bytes,
total_bytes * 1000 / total_us);
}
#else
#define dsi_perf_mark_setup()
#define dsi_perf_mark_start()
#define dsi_perf_show(x)
#endif
static void print_irq_status(u32 status)
{
#ifndef VERBOSE_IRQ
if ((status & ~DSI_IRQ_CHANNEL_MASK) == 0)
return;
#endif
printk(KERN_DEBUG "DSI IRQ: 0x%x: ", status);
#define PIS(x) \
if (status & DSI_IRQ_##x) \
printk(#x " ");
#ifdef VERBOSE_IRQ
PIS(VC0);
PIS(VC1);
PIS(VC2);
PIS(VC3);
#endif
PIS(WAKEUP);
PIS(RESYNC);
PIS(PLL_LOCK);
PIS(PLL_UNLOCK);
PIS(PLL_RECALL);
PIS(COMPLEXIO_ERR);
PIS(HS_TX_TIMEOUT);
PIS(LP_RX_TIMEOUT);
PIS(TE_TRIGGER);
PIS(ACK_TRIGGER);
PIS(SYNC_LOST);
PIS(LDO_POWER_GOOD);
PIS(TA_TIMEOUT);
#undef PIS
printk("\n");
}
static void print_irq_status_vc(int channel, u32 status)
{
#ifndef VERBOSE_IRQ
if ((status & ~DSI_VC_IRQ_PACKET_SENT) == 0)
return;
#endif
printk(KERN_DEBUG "DSI VC(%d) IRQ 0x%x: ", channel, status);
#define PIS(x) \
if (status & DSI_VC_IRQ_##x) \
printk(#x " ");
PIS(CS);
PIS(ECC_CORR);
#ifdef VERBOSE_IRQ
PIS(PACKET_SENT);
#endif
PIS(FIFO_TX_OVF);
PIS(FIFO_RX_OVF);
PIS(BTA);
PIS(ECC_NO_CORR);
PIS(FIFO_TX_UDF);
PIS(PP_BUSY_CHANGE);
#undef PIS
printk("\n");
}
static void print_irq_status_cio(u32 status)
{
printk(KERN_DEBUG "DSI CIO IRQ 0x%x: ", status);
#define PIS(x) \
if (status & DSI_CIO_IRQ_##x) \
printk(#x " ");
PIS(ERRSYNCESC1);
PIS(ERRSYNCESC2);
PIS(ERRSYNCESC3);
PIS(ERRESC1);
PIS(ERRESC2);
PIS(ERRESC3);
PIS(ERRCONTROL1);
PIS(ERRCONTROL2);
PIS(ERRCONTROL3);
PIS(STATEULPS1);
PIS(STATEULPS2);
PIS(STATEULPS3);
PIS(ERRCONTENTIONLP0_1);
PIS(ERRCONTENTIONLP1_1);
PIS(ERRCONTENTIONLP0_2);
PIS(ERRCONTENTIONLP1_2);
PIS(ERRCONTENTIONLP0_3);
PIS(ERRCONTENTIONLP1_3);
PIS(ULPSACTIVENOT_ALL0);
PIS(ULPSACTIVENOT_ALL1);
#undef PIS
printk("\n");
}
static int debug_irq;
/* called from dss */
void dsi_irq_handler(void)
{
u32 irqstatus, vcstatus, ciostatus;
int i;
irqstatus = dsi_read_reg(DSI_IRQSTATUS);
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
spin_lock(&dsi.irq_stats_lock);
dsi.irq_stats.irq_count++;
dss_collect_irq_stats(irqstatus, dsi.irq_stats.dsi_irqs);
#endif
if (irqstatus & DSI_IRQ_ERROR_MASK) {
DSSERR("DSI error, irqstatus %x\n", irqstatus);
print_irq_status(irqstatus);
spin_lock(&dsi.errors_lock);
dsi.errors |= irqstatus & DSI_IRQ_ERROR_MASK;
spin_unlock(&dsi.errors_lock);
} else if (debug_irq) {
print_irq_status(irqstatus);
}
#ifdef DSI_CATCH_MISSING_TE
if (irqstatus & DSI_IRQ_TE_TRIGGER)
del_timer(&dsi.te_timer);
#endif
for (i = 0; i < 4; ++i) {
if ((irqstatus & (1<<i)) == 0)
continue;
vcstatus = dsi_read_reg(DSI_VC_IRQSTATUS(i));
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
dss_collect_irq_stats(vcstatus, dsi.irq_stats.vc_irqs[i]);
#endif
if (vcstatus & DSI_VC_IRQ_BTA) {
complete(&dsi.bta_completion);
if (dsi.bta_callback)
dsi.bta_callback();
}
if (vcstatus & DSI_VC_IRQ_ERROR_MASK) {
DSSERR("DSI VC(%d) error, vc irqstatus %x\n",
i, vcstatus);
print_irq_status_vc(i, vcstatus);
} else if (debug_irq) {
print_irq_status_vc(i, vcstatus);
}
dsi_write_reg(DSI_VC_IRQSTATUS(i), vcstatus);
/* flush posted write */
dsi_read_reg(DSI_VC_IRQSTATUS(i));
}
if (irqstatus & DSI_IRQ_COMPLEXIO_ERR) {
ciostatus = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
dss_collect_irq_stats(ciostatus, dsi.irq_stats.cio_irqs);
#endif
dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
/* flush posted write */
dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
if (ciostatus & DSI_CIO_IRQ_ERROR_MASK) {
DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
print_irq_status_cio(ciostatus);
} else if (debug_irq) {
print_irq_status_cio(ciostatus);
}
}
dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
/* flush posted write */
dsi_read_reg(DSI_IRQSTATUS);
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
spin_unlock(&dsi.irq_stats_lock);
#endif
}
static void _dsi_initialize_irq(void)
{
u32 l;
int i;
/* disable all interrupts */
dsi_write_reg(DSI_IRQENABLE, 0);
for (i = 0; i < 4; ++i)
dsi_write_reg(DSI_VC_IRQENABLE(i), 0);
dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, 0);
/* clear interrupt status */
l = dsi_read_reg(DSI_IRQSTATUS);
dsi_write_reg(DSI_IRQSTATUS, l & ~DSI_IRQ_CHANNEL_MASK);
for (i = 0; i < 4; ++i) {
l = dsi_read_reg(DSI_VC_IRQSTATUS(i));
dsi_write_reg(DSI_VC_IRQSTATUS(i), l);
}
l = dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, l);
/* enable error irqs */
l = DSI_IRQ_ERROR_MASK;
#ifdef DSI_CATCH_MISSING_TE
l |= DSI_IRQ_TE_TRIGGER;
#endif
dsi_write_reg(DSI_IRQENABLE, l);
l = DSI_VC_IRQ_ERROR_MASK;
for (i = 0; i < 4; ++i)
dsi_write_reg(DSI_VC_IRQENABLE(i), l);
l = DSI_CIO_IRQ_ERROR_MASK;
dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE, l);
}
static u32 dsi_get_errors(void)
{
unsigned long flags;
u32 e;
spin_lock_irqsave(&dsi.errors_lock, flags);
e = dsi.errors;
dsi.errors = 0;
spin_unlock_irqrestore(&dsi.errors_lock, flags);
return e;
}
static void dsi_vc_enable_bta_irq(int channel)
{
u32 l;
dsi_write_reg(DSI_VC_IRQSTATUS(channel), DSI_VC_IRQ_BTA);
l = dsi_read_reg(DSI_VC_IRQENABLE(channel));
l |= DSI_VC_IRQ_BTA;
dsi_write_reg(DSI_VC_IRQENABLE(channel), l);
}
static void dsi_vc_disable_bta_irq(int channel)
{
u32 l;
l = dsi_read_reg(DSI_VC_IRQENABLE(channel));
l &= ~DSI_VC_IRQ_BTA;
dsi_write_reg(DSI_VC_IRQENABLE(channel), l);
}
/* DSI func clock. this could also be DSI2_PLL_FCLK */
static inline void enable_clocks(bool enable)
{
if (enable)
dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
else
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
}
/* source clock for DSI PLL. this could also be PCLKFREE */
static inline void dsi_enable_pll_clock(bool enable)
{
if (enable)
dss_clk_enable(DSS_CLK_FCK2);
else
dss_clk_disable(DSS_CLK_FCK2);
if (enable && dsi.pll_locked) {
if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1)
DSSERR("cannot lock PLL when enabling clocks\n");
}
}
#ifdef DEBUG
static void _dsi_print_reset_status(void)
{
u32 l;
if (!dss_debug)
return;
/* A dummy read using the SCP interface to any DSIPHY register is
* required after DSIPHY reset to complete the reset of the DSI complex
* I/O. */
l = dsi_read_reg(DSI_DSIPHY_CFG5);
printk(KERN_DEBUG "DSI resets: ");
l = dsi_read_reg(DSI_PLL_STATUS);
printk("PLL (%d) ", FLD_GET(l, 0, 0));
l = dsi_read_reg(DSI_COMPLEXIO_CFG1);
printk("CIO (%d) ", FLD_GET(l, 29, 29));
l = dsi_read_reg(DSI_DSIPHY_CFG5);
printk("PHY (%x, %d, %d, %d)\n",
FLD_GET(l, 28, 26),
FLD_GET(l, 29, 29),
FLD_GET(l, 30, 30),
FLD_GET(l, 31, 31));
}
#else
#define _dsi_print_reset_status()
#endif
static inline int dsi_if_enable(bool enable)
{
DSSDBG("dsi_if_enable(%d)\n", enable);
enable = enable ? 1 : 0;
REG_FLD_MOD(DSI_CTRL, enable, 0, 0); /* IF_EN */
if (wait_for_bit_change(DSI_CTRL, 0, enable) != enable) {
DSSERR("Failed to set dsi_if_enable to %d\n", enable);
return -EIO;
}
return 0;
}
unsigned long dsi_get_dsi1_pll_rate(void)
{
return dsi.current_cinfo.dsi1_pll_fclk;
}
static unsigned long dsi_get_dsi2_pll_rate(void)
{
return dsi.current_cinfo.dsi2_pll_fclk;
}
static unsigned long dsi_get_txbyteclkhs(void)
{
return dsi.current_cinfo.clkin4ddr / 16;
}
static unsigned long dsi_fclk_rate(void)
{
unsigned long r;
if (dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK) {
/* DSI FCLK source is DSS1_ALWON_FCK, which is dss1_fck */
r = dss_clk_get_rate(DSS_CLK_FCK1);
} else {
/* DSI FCLK source is DSI2_PLL_FCLK */
r = dsi_get_dsi2_pll_rate();
}
return r;
}
static int dsi_set_lp_clk_divisor(struct omap_dss_device *dssdev)
{
unsigned long dsi_fclk;
unsigned lp_clk_div;
unsigned long lp_clk;
lp_clk_div = dssdev->phy.dsi.div.lp_clk_div;
if (lp_clk_div == 0 || lp_clk_div > LP_DIV_MAX)
return -EINVAL;
dsi_fclk = dsi_fclk_rate();
lp_clk = dsi_fclk / 2 / lp_clk_div;
DSSDBG("LP_CLK_DIV %u, LP_CLK %lu\n", lp_clk_div, lp_clk);
dsi.current_cinfo.lp_clk = lp_clk;
dsi.current_cinfo.lp_clk_div = lp_clk_div;
REG_FLD_MOD(DSI_CLK_CTRL, lp_clk_div, 12, 0); /* LP_CLK_DIVISOR */
REG_FLD_MOD(DSI_CLK_CTRL, dsi_fclk > 30000000 ? 1 : 0,
21, 21); /* LP_RX_SYNCHRO_ENABLE */
return 0;
}
enum dsi_pll_power_state {
DSI_PLL_POWER_OFF = 0x0,
DSI_PLL_POWER_ON_HSCLK = 0x1,
DSI_PLL_POWER_ON_ALL = 0x2,
DSI_PLL_POWER_ON_DIV = 0x3,
};
static int dsi_pll_power(enum dsi_pll_power_state state)
{
int t = 0;
REG_FLD_MOD(DSI_CLK_CTRL, state, 31, 30); /* PLL_PWR_CMD */
/* PLL_PWR_STATUS */
while (FLD_GET(dsi_read_reg(DSI_CLK_CTRL), 29, 28) != state) {
if (++t > 1000) {
DSSERR("Failed to set DSI PLL power mode to %d\n",
state);
return -ENODEV;
}
udelay(1);
}
return 0;
}
/* calculate clock rates using dividers in cinfo */
static int dsi_calc_clock_rates(struct dsi_clock_info *cinfo)
{
if (cinfo->regn == 0 || cinfo->regn > REGN_MAX)
return -EINVAL;
if (cinfo->regm == 0 || cinfo->regm > REGM_MAX)
return -EINVAL;
if (cinfo->regm3 > REGM3_MAX)
return -EINVAL;
if (cinfo->regm4 > REGM4_MAX)
return -EINVAL;
if (cinfo->use_dss2_fck) {
cinfo->clkin = dss_clk_get_rate(DSS_CLK_FCK2);
/* XXX it is unclear if highfreq should be used
* with DSS2_FCK source also */
cinfo->highfreq = 0;
} else {
cinfo->clkin = dispc_pclk_rate();
if (cinfo->clkin < 32000000)
cinfo->highfreq = 0;
else
cinfo->highfreq = 1;
}
cinfo->fint = cinfo->clkin / (cinfo->regn * (cinfo->highfreq ? 2 : 1));
if (cinfo->fint > FINT_MAX || cinfo->fint < FINT_MIN)
return -EINVAL;
cinfo->clkin4ddr = 2 * cinfo->regm * cinfo->fint;
if (cinfo->clkin4ddr > 1800 * 1000 * 1000)
return -EINVAL;
if (cinfo->regm3 > 0)
cinfo->dsi1_pll_fclk = cinfo->clkin4ddr / cinfo->regm3;
else
cinfo->dsi1_pll_fclk = 0;
if (cinfo->regm4 > 0)
cinfo->dsi2_pll_fclk = cinfo->clkin4ddr / cinfo->regm4;
else
cinfo->dsi2_pll_fclk = 0;
return 0;
}
int dsi_pll_calc_clock_div_pck(bool is_tft, unsigned long req_pck,
struct dsi_clock_info *dsi_cinfo,
struct dispc_clock_info *dispc_cinfo)
{
struct dsi_clock_info cur, best;
struct dispc_clock_info best_dispc;
int min_fck_per_pck;
int match = 0;
unsigned long dss_clk_fck2;
dss_clk_fck2 = dss_clk_get_rate(DSS_CLK_FCK2);
if (req_pck == dsi.cache_req_pck &&
dsi.cache_cinfo.clkin == dss_clk_fck2) {
DSSDBG("DSI clock info found from cache\n");
*dsi_cinfo = dsi.cache_cinfo;
dispc_find_clk_divs(is_tft, req_pck, dsi_cinfo->dsi1_pll_fclk,
dispc_cinfo);
return 0;
}
min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK;
if (min_fck_per_pck &&
req_pck * min_fck_per_pck > DISPC_MAX_FCK) {
DSSERR("Requested pixel clock not possible with the current "
"OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning "
"the constraint off.\n");
min_fck_per_pck = 0;
}
DSSDBG("dsi_pll_calc\n");
retry:
memset(&best, 0, sizeof(best));
memset(&best_dispc, 0, sizeof(best_dispc));
memset(&cur, 0, sizeof(cur));
cur.clkin = dss_clk_fck2;
cur.use_dss2_fck = 1;
cur.highfreq = 0;
/* no highfreq: 0.75MHz < Fint = clkin / regn < 2.1MHz */
/* highfreq: 0.75MHz < Fint = clkin / (2*regn) < 2.1MHz */
/* To reduce PLL lock time, keep Fint high (around 2 MHz) */
for (cur.regn = 1; cur.regn < REGN_MAX; ++cur.regn) {
if (cur.highfreq == 0)
cur.fint = cur.clkin / cur.regn;
else
cur.fint = cur.clkin / (2 * cur.regn);
if (cur.fint > FINT_MAX || cur.fint < FINT_MIN)
continue;
/* DSIPHY(MHz) = (2 * regm / regn) * (clkin / (highfreq + 1)) */
for (cur.regm = 1; cur.regm < REGM_MAX; ++cur.regm) {
unsigned long a, b;
a = 2 * cur.regm * (cur.clkin/1000);
b = cur.regn * (cur.highfreq + 1);
cur.clkin4ddr = a / b * 1000;
if (cur.clkin4ddr > 1800 * 1000 * 1000)
break;
/* DSI1_PLL_FCLK(MHz) = DSIPHY(MHz) / regm3 < 173MHz */
for (cur.regm3 = 1; cur.regm3 < REGM3_MAX;
++cur.regm3) {
struct dispc_clock_info cur_dispc;
cur.dsi1_pll_fclk = cur.clkin4ddr / cur.regm3;
/* this will narrow down the search a bit,
* but still give pixclocks below what was
* requested */
if (cur.dsi1_pll_fclk < req_pck)
break;
if (cur.dsi1_pll_fclk > DISPC_MAX_FCK)
continue;
if (min_fck_per_pck &&
cur.dsi1_pll_fclk <
req_pck * min_fck_per_pck)
continue;
match = 1;
dispc_find_clk_divs(is_tft, req_pck,
cur.dsi1_pll_fclk,
&cur_dispc);
if (abs(cur_dispc.pck - req_pck) <
abs(best_dispc.pck - req_pck)) {
best = cur;
best_dispc = cur_dispc;
if (cur_dispc.pck == req_pck)
goto found;
}
}
}
}
found:
if (!match) {
if (min_fck_per_pck) {
DSSERR("Could not find suitable clock settings.\n"
"Turning FCK/PCK constraint off and"
"trying again.\n");
min_fck_per_pck = 0;
goto retry;
}
DSSERR("Could not find suitable clock settings.\n");
return -EINVAL;
}
/* DSI2_PLL_FCLK (regm4) is not used */
best.regm4 = 0;
best.dsi2_pll_fclk = 0;
if (dsi_cinfo)
*dsi_cinfo = best;
if (dispc_cinfo)
*dispc_cinfo = best_dispc;
dsi.cache_req_pck = req_pck;
dsi.cache_clk_freq = 0;
dsi.cache_cinfo = best;
return 0;
}
int dsi_pll_set_clock_div(struct dsi_clock_info *cinfo)
{
int r = 0;
u32 l;
int f;
DSSDBGF();
dsi.current_cinfo.fint = cinfo->fint;
dsi.current_cinfo.clkin4ddr = cinfo->clkin4ddr;
dsi.current_cinfo.dsi1_pll_fclk = cinfo->dsi1_pll_fclk;
dsi.current_cinfo.dsi2_pll_fclk = cinfo->dsi2_pll_fclk;
dsi.current_cinfo.regn = cinfo->regn;
dsi.current_cinfo.regm = cinfo->regm;
dsi.current_cinfo.regm3 = cinfo->regm3;
dsi.current_cinfo.regm4 = cinfo->regm4;
DSSDBG("DSI Fint %ld\n", cinfo->fint);
DSSDBG("clkin (%s) rate %ld, highfreq %d\n",
cinfo->use_dss2_fck ? "dss2_fck" : "pclkfree",
cinfo->clkin,
cinfo->highfreq);
/* DSIPHY == CLKIN4DDR */
DSSDBG("CLKIN4DDR = 2 * %d / %d * %lu / %d = %lu\n",
cinfo->regm,
cinfo->regn,
cinfo->clkin,
cinfo->highfreq + 1,
cinfo->clkin4ddr);
DSSDBG("Data rate on 1 DSI lane %ld Mbps\n",
cinfo->clkin4ddr / 1000 / 1000 / 2);
DSSDBG("Clock lane freq %ld Hz\n", cinfo->clkin4ddr / 4);
DSSDBG("regm3 = %d, dsi1_pll_fclk = %lu\n",
cinfo->regm3, cinfo->dsi1_pll_fclk);
DSSDBG("regm4 = %d, dsi2_pll_fclk = %lu\n",
cinfo->regm4, cinfo->dsi2_pll_fclk);
REG_FLD_MOD(DSI_PLL_CONTROL, 0, 0, 0); /* DSI_PLL_AUTOMODE = manual */
l = dsi_read_reg(DSI_PLL_CONFIGURATION1);
l = FLD_MOD(l, 1, 0, 0); /* DSI_PLL_STOPMODE */
l = FLD_MOD(l, cinfo->regn - 1, 7, 1); /* DSI_PLL_REGN */
l = FLD_MOD(l, cinfo->regm, 18, 8); /* DSI_PLL_REGM */
l = FLD_MOD(l, cinfo->regm3 > 0 ? cinfo->regm3 - 1 : 0,
22, 19); /* DSI_CLOCK_DIV */
l = FLD_MOD(l, cinfo->regm4 > 0 ? cinfo->regm4 - 1 : 0,
26, 23); /* DSIPROTO_CLOCK_DIV */
dsi_write_reg(DSI_PLL_CONFIGURATION1, l);
BUG_ON(cinfo->fint < 750000 || cinfo->fint > 2100000);
if (cinfo->fint < 1000000)
f = 0x3;
else if (cinfo->fint < 1250000)
f = 0x4;
else if (cinfo->fint < 1500000)
f = 0x5;
else if (cinfo->fint < 1750000)
f = 0x6;
else
f = 0x7;
l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
l = FLD_MOD(l, f, 4, 1); /* DSI_PLL_FREQSEL */
l = FLD_MOD(l, cinfo->use_dss2_fck ? 0 : 1,
11, 11); /* DSI_PLL_CLKSEL */
l = FLD_MOD(l, cinfo->highfreq,
12, 12); /* DSI_PLL_HIGHFREQ */
l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
l = FLD_MOD(l, 0, 14, 14); /* DSIPHY_CLKINEN */
l = FLD_MOD(l, 1, 20, 20); /* DSI_HSDIVBYPASS */
dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
REG_FLD_MOD(DSI_PLL_GO, 1, 0, 0); /* DSI_PLL_GO */
if (wait_for_bit_change(DSI_PLL_GO, 0, 0) != 0) {
DSSERR("dsi pll go bit not going down.\n");
r = -EIO;
goto err;
}
if (wait_for_bit_change(DSI_PLL_STATUS, 1, 1) != 1) {
DSSERR("cannot lock PLL\n");
r = -EIO;
goto err;
}
dsi.pll_locked = 1;
l = dsi_read_reg(DSI_PLL_CONFIGURATION2);
l = FLD_MOD(l, 0, 0, 0); /* DSI_PLL_IDLE */
l = FLD_MOD(l, 0, 5, 5); /* DSI_PLL_PLLLPMODE */
l = FLD_MOD(l, 0, 6, 6); /* DSI_PLL_LOWCURRSTBY */
l = FLD_MOD(l, 0, 7, 7); /* DSI_PLL_TIGHTPHASELOCK */
l = FLD_MOD(l, 0, 8, 8); /* DSI_PLL_DRIFTGUARDEN */
l = FLD_MOD(l, 0, 10, 9); /* DSI_PLL_LOCKSEL */
l = FLD_MOD(l, 1, 13, 13); /* DSI_PLL_REFEN */
l = FLD_MOD(l, 1, 14, 14); /* DSIPHY_CLKINEN */
l = FLD_MOD(l, 0, 15, 15); /* DSI_BYPASSEN */
l = FLD_MOD(l, 1, 16, 16); /* DSS_CLOCK_EN */
l = FLD_MOD(l, 0, 17, 17); /* DSS_CLOCK_PWDN */
l = FLD_MOD(l, 1, 18, 18); /* DSI_PROTO_CLOCK_EN */
l = FLD_MOD(l, 0, 19, 19); /* DSI_PROTO_CLOCK_PWDN */
l = FLD_MOD(l, 0, 20, 20); /* DSI_HSDIVBYPASS */
dsi_write_reg(DSI_PLL_CONFIGURATION2, l);
DSSDBG("PLL config done\n");
err:
return r;
}
int dsi_pll_init(struct omap_dss_device *dssdev, bool enable_hsclk,
bool enable_hsdiv)
{
int r = 0;
enum dsi_pll_power_state pwstate;
DSSDBG("PLL init\n");
enable_clocks(1);
dsi_enable_pll_clock(1);
r = regulator_enable(dsi.vdds_dsi_reg);
if (r)
goto err0;
/* XXX PLL does not come out of reset without this... */
dispc_pck_free_enable(1);
if (wait_for_bit_change(DSI_PLL_STATUS, 0, 1) != 1) {
DSSERR("PLL not coming out of reset.\n");
r = -ENODEV;
dispc_pck_free_enable(0);
goto err1;
}
/* XXX ... but if left on, we get problems when planes do not
* fill the whole display. No idea about this */
dispc_pck_free_enable(0);
if (enable_hsclk && enable_hsdiv)
pwstate = DSI_PLL_POWER_ON_ALL;
else if (enable_hsclk)
pwstate = DSI_PLL_POWER_ON_HSCLK;
else if (enable_hsdiv)
pwstate = DSI_PLL_POWER_ON_DIV;
else
pwstate = DSI_PLL_POWER_OFF;
r = dsi_pll_power(pwstate);
if (r)
goto err1;
DSSDBG("PLL init done\n");
return 0;
err1:
regulator_disable(dsi.vdds_dsi_reg);
err0:
enable_clocks(0);
dsi_enable_pll_clock(0);
return r;
}
void dsi_pll_uninit(void)
{
enable_clocks(0);
dsi_enable_pll_clock(0);
dsi.pll_locked = 0;
dsi_pll_power(DSI_PLL_POWER_OFF);
regulator_disable(dsi.vdds_dsi_reg);
DSSDBG("PLL uninit done\n");
}
void dsi_dump_clocks(struct seq_file *s)
{
int clksel;
struct dsi_clock_info *cinfo = &dsi.current_cinfo;
enable_clocks(1);
clksel = REG_GET(DSI_PLL_CONFIGURATION2, 11, 11);
seq_printf(s, "- DSI PLL -\n");
seq_printf(s, "dsi pll source = %s\n",
clksel == 0 ?
"dss2_alwon_fclk" : "pclkfree");
seq_printf(s, "Fint\t\t%-16luregn %u\n", cinfo->fint, cinfo->regn);
seq_printf(s, "CLKIN4DDR\t%-16luregm %u\n",
cinfo->clkin4ddr, cinfo->regm);
seq_printf(s, "dsi1_pll_fck\t%-16luregm3 %u\t(%s)\n",
cinfo->dsi1_pll_fclk,
cinfo->regm3,
dss_get_dispc_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
"off" : "on");
seq_printf(s, "dsi2_pll_fck\t%-16luregm4 %u\t(%s)\n",
cinfo->dsi2_pll_fclk,
cinfo->regm4,
dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
"off" : "on");
seq_printf(s, "- DSI -\n");
seq_printf(s, "dsi fclk source = %s\n",
dss_get_dsi_clk_source() == DSS_SRC_DSS1_ALWON_FCLK ?
"dss1_alwon_fclk" : "dsi2_pll_fclk");
seq_printf(s, "DSI_FCLK\t%lu\n", dsi_fclk_rate());
seq_printf(s, "DDR_CLK\t\t%lu\n",
cinfo->clkin4ddr / 4);
seq_printf(s, "TxByteClkHS\t%lu\n", dsi_get_txbyteclkhs());
seq_printf(s, "LP_CLK\t\t%lu\n", cinfo->lp_clk);
seq_printf(s, "VP_CLK\t\t%lu\n"
"VP_PCLK\t\t%lu\n",
dispc_lclk_rate(),
dispc_pclk_rate());
enable_clocks(0);
}
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
void dsi_dump_irqs(struct seq_file *s)
{
unsigned long flags;
struct dsi_irq_stats stats;
spin_lock_irqsave(&dsi.irq_stats_lock, flags);
stats = dsi.irq_stats;
memset(&dsi.irq_stats, 0, sizeof(dsi.irq_stats));
dsi.irq_stats.last_reset = jiffies;
spin_unlock_irqrestore(&dsi.irq_stats_lock, flags);
seq_printf(s, "period %u ms\n",
jiffies_to_msecs(jiffies - stats.last_reset));
seq_printf(s, "irqs %d\n", stats.irq_count);
#define PIS(x) \
seq_printf(s, "%-20s %10d\n", #x, stats.dsi_irqs[ffs(DSI_IRQ_##x)-1]);
seq_printf(s, "-- DSI interrupts --\n");
PIS(VC0);
PIS(VC1);
PIS(VC2);
PIS(VC3);
PIS(WAKEUP);
PIS(RESYNC);
PIS(PLL_LOCK);
PIS(PLL_UNLOCK);
PIS(PLL_RECALL);
PIS(COMPLEXIO_ERR);
PIS(HS_TX_TIMEOUT);
PIS(LP_RX_TIMEOUT);
PIS(TE_TRIGGER);
PIS(ACK_TRIGGER);
PIS(SYNC_LOST);
PIS(LDO_POWER_GOOD);
PIS(TA_TIMEOUT);
#undef PIS
#define PIS(x) \
seq_printf(s, "%-20s %10d %10d %10d %10d\n", #x, \
stats.vc_irqs[0][ffs(DSI_VC_IRQ_##x)-1], \
stats.vc_irqs[1][ffs(DSI_VC_IRQ_##x)-1], \
stats.vc_irqs[2][ffs(DSI_VC_IRQ_##x)-1], \
stats.vc_irqs[3][ffs(DSI_VC_IRQ_##x)-1]);
seq_printf(s, "-- VC interrupts --\n");
PIS(CS);
PIS(ECC_CORR);
PIS(PACKET_SENT);
PIS(FIFO_TX_OVF);
PIS(FIFO_RX_OVF);
PIS(BTA);
PIS(ECC_NO_CORR);
PIS(FIFO_TX_UDF);
PIS(PP_BUSY_CHANGE);
#undef PIS
#define PIS(x) \
seq_printf(s, "%-20s %10d\n", #x, \
stats.cio_irqs[ffs(DSI_CIO_IRQ_##x)-1]);
seq_printf(s, "-- CIO interrupts --\n");
PIS(ERRSYNCESC1);
PIS(ERRSYNCESC2);
PIS(ERRSYNCESC3);
PIS(ERRESC1);
PIS(ERRESC2);
PIS(ERRESC3);
PIS(ERRCONTROL1);
PIS(ERRCONTROL2);
PIS(ERRCONTROL3);
PIS(STATEULPS1);
PIS(STATEULPS2);
PIS(STATEULPS3);
PIS(ERRCONTENTIONLP0_1);
PIS(ERRCONTENTIONLP1_1);
PIS(ERRCONTENTIONLP0_2);
PIS(ERRCONTENTIONLP1_2);
PIS(ERRCONTENTIONLP0_3);
PIS(ERRCONTENTIONLP1_3);
PIS(ULPSACTIVENOT_ALL0);
PIS(ULPSACTIVENOT_ALL1);
#undef PIS
}
#endif
void dsi_dump_regs(struct seq_file *s)
{
#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dsi_read_reg(r))
dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
DUMPREG(DSI_REVISION);
DUMPREG(DSI_SYSCONFIG);
DUMPREG(DSI_SYSSTATUS);
DUMPREG(DSI_IRQSTATUS);
DUMPREG(DSI_IRQENABLE);
DUMPREG(DSI_CTRL);
DUMPREG(DSI_COMPLEXIO_CFG1);
DUMPREG(DSI_COMPLEXIO_IRQ_STATUS);
DUMPREG(DSI_COMPLEXIO_IRQ_ENABLE);
DUMPREG(DSI_CLK_CTRL);
DUMPREG(DSI_TIMING1);
DUMPREG(DSI_TIMING2);
DUMPREG(DSI_VM_TIMING1);
DUMPREG(DSI_VM_TIMING2);
DUMPREG(DSI_VM_TIMING3);
DUMPREG(DSI_CLK_TIMING);
DUMPREG(DSI_TX_FIFO_VC_SIZE);
DUMPREG(DSI_RX_FIFO_VC_SIZE);
DUMPREG(DSI_COMPLEXIO_CFG2);
DUMPREG(DSI_RX_FIFO_VC_FULLNESS);
DUMPREG(DSI_VM_TIMING4);
DUMPREG(DSI_TX_FIFO_VC_EMPTINESS);
DUMPREG(DSI_VM_TIMING5);
DUMPREG(DSI_VM_TIMING6);
DUMPREG(DSI_VM_TIMING7);
DUMPREG(DSI_STOPCLK_TIMING);
DUMPREG(DSI_VC_CTRL(0));
DUMPREG(DSI_VC_TE(0));
DUMPREG(DSI_VC_LONG_PACKET_HEADER(0));
DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(0));
DUMPREG(DSI_VC_SHORT_PACKET_HEADER(0));
DUMPREG(DSI_VC_IRQSTATUS(0));
DUMPREG(DSI_VC_IRQENABLE(0));
DUMPREG(DSI_VC_CTRL(1));
DUMPREG(DSI_VC_TE(1));
DUMPREG(DSI_VC_LONG_PACKET_HEADER(1));
DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(1));
DUMPREG(DSI_VC_SHORT_PACKET_HEADER(1));
DUMPREG(DSI_VC_IRQSTATUS(1));
DUMPREG(DSI_VC_IRQENABLE(1));
DUMPREG(DSI_VC_CTRL(2));
DUMPREG(DSI_VC_TE(2));
DUMPREG(DSI_VC_LONG_PACKET_HEADER(2));
DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(2));
DUMPREG(DSI_VC_SHORT_PACKET_HEADER(2));
DUMPREG(DSI_VC_IRQSTATUS(2));
DUMPREG(DSI_VC_IRQENABLE(2));
DUMPREG(DSI_VC_CTRL(3));
DUMPREG(DSI_VC_TE(3));
DUMPREG(DSI_VC_LONG_PACKET_HEADER(3));
DUMPREG(DSI_VC_LONG_PACKET_PAYLOAD(3));
DUMPREG(DSI_VC_SHORT_PACKET_HEADER(3));
DUMPREG(DSI_VC_IRQSTATUS(3));
DUMPREG(DSI_VC_IRQENABLE(3));
DUMPREG(DSI_DSIPHY_CFG0);
DUMPREG(DSI_DSIPHY_CFG1);
DUMPREG(DSI_DSIPHY_CFG2);
DUMPREG(DSI_DSIPHY_CFG5);
DUMPREG(DSI_PLL_CONTROL);
DUMPREG(DSI_PLL_STATUS);
DUMPREG(DSI_PLL_GO);
DUMPREG(DSI_PLL_CONFIGURATION1);
DUMPREG(DSI_PLL_CONFIGURATION2);
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
#undef DUMPREG
}
enum dsi_complexio_power_state {
DSI_COMPLEXIO_POWER_OFF = 0x0,
DSI_COMPLEXIO_POWER_ON = 0x1,
DSI_COMPLEXIO_POWER_ULPS = 0x2,
};
static int dsi_complexio_power(enum dsi_complexio_power_state state)
{
int t = 0;
/* PWR_CMD */
REG_FLD_MOD(DSI_COMPLEXIO_CFG1, state, 28, 27);
/* PWR_STATUS */
while (FLD_GET(dsi_read_reg(DSI_COMPLEXIO_CFG1), 26, 25) != state) {
if (++t > 1000) {
DSSERR("failed to set complexio power state to "
"%d\n", state);
return -ENODEV;
}
udelay(1);
}
return 0;
}
static void dsi_complexio_config(struct omap_dss_device *dssdev)
{
u32 r;
int clk_lane = dssdev->phy.dsi.clk_lane;
int data1_lane = dssdev->phy.dsi.data1_lane;
int data2_lane = dssdev->phy.dsi.data2_lane;
int clk_pol = dssdev->phy.dsi.clk_pol;
int data1_pol = dssdev->phy.dsi.data1_pol;
int data2_pol = dssdev->phy.dsi.data2_pol;
r = dsi_read_reg(DSI_COMPLEXIO_CFG1);
r = FLD_MOD(r, clk_lane, 2, 0);
r = FLD_MOD(r, clk_pol, 3, 3);
r = FLD_MOD(r, data1_lane, 6, 4);
r = FLD_MOD(r, data1_pol, 7, 7);
r = FLD_MOD(r, data2_lane, 10, 8);
r = FLD_MOD(r, data2_pol, 11, 11);
dsi_write_reg(DSI_COMPLEXIO_CFG1, r);
/* The configuration of the DSI complex I/O (number of data lanes,
position, differential order) should not be changed while
DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. In order for
the hardware to take into account a new configuration of the complex
I/O (done in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to
follow this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1,
then reset the DSS.DSI_CTRL[0] IF_EN to 0, then set
DSS.DSI_CLK_CTRL[20] LP_CLK_ENABLE to 1 and finally set again the
DSS.DSI_CTRL[0] IF_EN bit to 1. If the sequence is not followed, the
DSI complex I/O configuration is unknown. */
/*
REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
REG_FLD_MOD(DSI_CTRL, 0, 0, 0);
REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20);
REG_FLD_MOD(DSI_CTRL, 1, 0, 0);
*/
}
static inline unsigned ns2ddr(unsigned ns)
{
/* convert time in ns to ddr ticks, rounding up */
unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
return (ns * (ddr_clk / 1000 / 1000) + 999) / 1000;
}
static inline unsigned ddr2ns(unsigned ddr)
{
unsigned long ddr_clk = dsi.current_cinfo.clkin4ddr / 4;
return ddr * 1000 * 1000 / (ddr_clk / 1000);
}
static void dsi_complexio_timings(void)
{
u32 r;
u32 ths_prepare, ths_prepare_ths_zero, ths_trail, ths_exit;
u32 tlpx_half, tclk_trail, tclk_zero;
u32 tclk_prepare;
/* calculate timings */
/* 1 * DDR_CLK = 2 * UI */
/* min 40ns + 4*UI max 85ns + 6*UI */
ths_prepare = ns2ddr(70) + 2;
/* min 145ns + 10*UI */
ths_prepare_ths_zero = ns2ddr(175) + 2;
/* min max(8*UI, 60ns+4*UI) */
ths_trail = ns2ddr(60) + 5;
/* min 100ns */
ths_exit = ns2ddr(145);
/* tlpx min 50n */
tlpx_half = ns2ddr(25);
/* min 60ns */
tclk_trail = ns2ddr(60) + 2;
/* min 38ns, max 95ns */
tclk_prepare = ns2ddr(65);
/* min tclk-prepare + tclk-zero = 300ns */
tclk_zero = ns2ddr(260);
DSSDBG("ths_prepare %u (%uns), ths_prepare_ths_zero %u (%uns)\n",
ths_prepare, ddr2ns(ths_prepare),
ths_prepare_ths_zero, ddr2ns(ths_prepare_ths_zero));
DSSDBG("ths_trail %u (%uns), ths_exit %u (%uns)\n",
ths_trail, ddr2ns(ths_trail),
ths_exit, ddr2ns(ths_exit));
DSSDBG("tlpx_half %u (%uns), tclk_trail %u (%uns), "
"tclk_zero %u (%uns)\n",
tlpx_half, ddr2ns(tlpx_half),
tclk_trail, ddr2ns(tclk_trail),
tclk_zero, ddr2ns(tclk_zero));
DSSDBG("tclk_prepare %u (%uns)\n",
tclk_prepare, ddr2ns(tclk_prepare));
/* program timings */
r = dsi_read_reg(DSI_DSIPHY_CFG0);
r = FLD_MOD(r, ths_prepare, 31, 24);
r = FLD_MOD(r, ths_prepare_ths_zero, 23, 16);
r = FLD_MOD(r, ths_trail, 15, 8);
r = FLD_MOD(r, ths_exit, 7, 0);
dsi_write_reg(DSI_DSIPHY_CFG0, r);
r = dsi_read_reg(DSI_DSIPHY_CFG1);
r = FLD_MOD(r, tlpx_half, 22, 16);
r = FLD_MOD(r, tclk_trail, 15, 8);
r = FLD_MOD(r, tclk_zero, 7, 0);
dsi_write_reg(DSI_DSIPHY_CFG1, r);
r = dsi_read_reg(DSI_DSIPHY_CFG2);
r = FLD_MOD(r, tclk_prepare, 7, 0);
dsi_write_reg(DSI_DSIPHY_CFG2, r);
}
static int dsi_complexio_init(struct omap_dss_device *dssdev)
{
int r = 0;
DSSDBG("dsi_complexio_init\n");
/* CIO_CLK_ICG, enable L3 clk to CIO */
REG_FLD_MOD(DSI_CLK_CTRL, 1, 14, 14);
/* A dummy read using the SCP interface to any DSIPHY register is
* required after DSIPHY reset to complete the reset of the DSI complex
* I/O. */
dsi_read_reg(DSI_DSIPHY_CFG5);
if (wait_for_bit_change(DSI_DSIPHY_CFG5, 30, 1) != 1) {
DSSERR("ComplexIO PHY not coming out of reset.\n");
r = -ENODEV;
goto err;
}
dsi_complexio_config(dssdev);
r = dsi_complexio_power(DSI_COMPLEXIO_POWER_ON);
if (r)
goto err;
if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 29, 1) != 1) {
DSSERR("ComplexIO not coming out of reset.\n");
r = -ENODEV;
goto err;
}
if (wait_for_bit_change(DSI_COMPLEXIO_CFG1, 21, 1) != 1) {
DSSERR("ComplexIO LDO power down.\n");
r = -ENODEV;
goto err;
}
dsi_complexio_timings();
/*
The configuration of the DSI complex I/O (number of data lanes,
position, differential order) should not be changed while
DSS.DSI_CLK_CRTRL[20] LP_CLK_ENABLE bit is set to 1. For the
hardware to recognize a new configuration of the complex I/O (done
in DSS.DSI_COMPLEXIO_CFG1 register), it is recommended to follow
this sequence: First set the DSS.DSI_CTRL[0] IF_EN bit to 1, next
reset the DSS.DSI_CTRL[0] IF_EN to 0, then set DSS.DSI_CLK_CTRL[20]
LP_CLK_ENABLE to 1, and finally, set again the DSS.DSI_CTRL[0] IF_EN
bit to 1. If the sequence is not followed, the DSi complex I/O
configuration is undetermined.
*/
dsi_if_enable(1);
dsi_if_enable(0);
REG_FLD_MOD(DSI_CLK_CTRL, 1, 20, 20); /* LP_CLK_ENABLE */
dsi_if_enable(1);
dsi_if_enable(0);
DSSDBG("CIO init done\n");
err:
return r;
}
static void dsi_complexio_uninit(void)
{
dsi_complexio_power(DSI_COMPLEXIO_POWER_OFF);
}
static int _dsi_wait_reset(void)
{
int t = 0;
while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) {
if (++t > 5) {
DSSERR("soft reset failed\n");
return -ENODEV;
}
udelay(1);
}
return 0;
}
static int _dsi_reset(void)
{
/* Soft reset */
REG_FLD_MOD(DSI_SYSCONFIG, 1, 1, 1);
return _dsi_wait_reset();
}
static void dsi_reset_tx_fifo(int channel)
{
u32 mask;
u32 l;
/* set fifosize of the channel to 0, then return the old size */
l = dsi_read_reg(DSI_TX_FIFO_VC_SIZE);
mask = FLD_MASK((8 * channel) + 7, (8 * channel) + 4);
dsi_write_reg(DSI_TX_FIFO_VC_SIZE, l & ~mask);
dsi_write_reg(DSI_TX_FIFO_VC_SIZE, l);
}
static void dsi_config_tx_fifo(enum fifo_size size1, enum fifo_size size2,
enum fifo_size size3, enum fifo_size size4)
{
u32 r = 0;
int add = 0;
int i;
dsi.vc[0].fifo_size = size1;
dsi.vc[1].fifo_size = size2;
dsi.vc[2].fifo_size = size3;
dsi.vc[3].fifo_size = size4;
for (i = 0; i < 4; i++) {
u8 v;
int size = dsi.vc[i].fifo_size;
if (add + size > 4) {
DSSERR("Illegal FIFO configuration\n");
BUG();
}
v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
r |= v << (8 * i);
/*DSSDBG("TX FIFO vc %d: size %d, add %d\n", i, size, add); */
add += size;
}
dsi_write_reg(DSI_TX_FIFO_VC_SIZE, r);
}
static void dsi_config_rx_fifo(enum fifo_size size1, enum fifo_size size2,
enum fifo_size size3, enum fifo_size size4)
{
u32 r = 0;
int add = 0;
int i;
dsi.vc[0].fifo_size = size1;
dsi.vc[1].fifo_size = size2;
dsi.vc[2].fifo_size = size3;
dsi.vc[3].fifo_size = size4;
for (i = 0; i < 4; i++) {
u8 v;
int size = dsi.vc[i].fifo_size;
if (add + size > 4) {
DSSERR("Illegal FIFO configuration\n");
BUG();
}
v = FLD_VAL(add, 2, 0) | FLD_VAL(size, 7, 4);
r |= v << (8 * i);
/*DSSDBG("RX FIFO vc %d: size %d, add %d\n", i, size, add); */
add += size;
}
dsi_write_reg(DSI_RX_FIFO_VC_SIZE, r);
}
static int dsi_force_tx_stop_mode_io(void)
{
u32 r;
r = dsi_read_reg(DSI_TIMING1);
r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
dsi_write_reg(DSI_TIMING1, r);
if (wait_for_bit_change(DSI_TIMING1, 15, 0) != 0) {
DSSERR("TX_STOP bit not going down\n");
return -EIO;
}
return 0;
}
static int dsi_vc_enable(int channel, bool enable)
{
DSSDBG("dsi_vc_enable channel %d, enable %d\n",
channel, enable);
enable = enable ? 1 : 0;
REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 0, 0);
if (wait_for_bit_change(DSI_VC_CTRL(channel), 0, enable) != enable) {
DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
return -EIO;
}
return 0;
}
static void dsi_vc_initial_config(int channel)
{
u32 r;
DSSDBGF("%d", channel);
r = dsi_read_reg(DSI_VC_CTRL(channel));
if (FLD_GET(r, 15, 15)) /* VC_BUSY */
DSSERR("VC(%d) busy when trying to configure it!\n",
channel);
r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
r = FLD_MOD(r, 0, 3, 3); /* BTA_LONG_EN */
r = FLD_MOD(r, 0, 4, 4); /* MODE, 0 = command */
r = FLD_MOD(r, 1, 7, 7); /* CS_TX_EN */
r = FLD_MOD(r, 1, 8, 8); /* ECC_TX_EN */
r = FLD_MOD(r, 0, 9, 9); /* MODE_SPEED, high speed on/off */
r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
dsi_write_reg(DSI_VC_CTRL(channel), r);
dsi.vc[channel].mode = DSI_VC_MODE_L4;
}
static int dsi_vc_config_l4(int channel)
{
if (dsi.vc[channel].mode == DSI_VC_MODE_L4)
return 0;
DSSDBGF("%d", channel);
dsi_vc_enable(channel, 0);
/* VC_BUSY */
if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
DSSERR("vc(%d) busy when trying to config for L4\n", channel);
return -EIO;
}
REG_FLD_MOD(DSI_VC_CTRL(channel), 0, 1, 1); /* SOURCE, 0 = L4 */
dsi_vc_enable(channel, 1);
dsi.vc[channel].mode = DSI_VC_MODE_L4;
return 0;
}
static int dsi_vc_config_vp(int channel)
{
if (dsi.vc[channel].mode == DSI_VC_MODE_VP)
return 0;
DSSDBGF("%d", channel);
dsi_vc_enable(channel, 0);
/* VC_BUSY */
if (wait_for_bit_change(DSI_VC_CTRL(channel), 15, 0) != 0) {
DSSERR("vc(%d) busy when trying to config for VP\n", channel);
return -EIO;
}
REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 1, 1); /* SOURCE, 1 = video port */
dsi_vc_enable(channel, 1);
dsi.vc[channel].mode = DSI_VC_MODE_VP;
return 0;
}
void omapdss_dsi_vc_enable_hs(int channel, bool enable)
{
DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
WARN_ON(!dsi_bus_is_locked());
dsi_vc_enable(channel, 0);
dsi_if_enable(0);
REG_FLD_MOD(DSI_VC_CTRL(channel), enable, 9, 9);
dsi_vc_enable(channel, 1);
dsi_if_enable(1);
dsi_force_tx_stop_mode_io();
}
EXPORT_SYMBOL(omapdss_dsi_vc_enable_hs);
static void dsi_vc_flush_long_data(int channel)
{
while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
u32 val;
val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
(val >> 0) & 0xff,
(val >> 8) & 0xff,
(val >> 16) & 0xff,
(val >> 24) & 0xff);
}
}
static void dsi_show_rx_ack_with_err(u16 err)
{
DSSERR("\tACK with ERROR (%#x):\n", err);
if (err & (1 << 0))
DSSERR("\t\tSoT Error\n");
if (err & (1 << 1))
DSSERR("\t\tSoT Sync Error\n");
if (err & (1 << 2))
DSSERR("\t\tEoT Sync Error\n");
if (err & (1 << 3))
DSSERR("\t\tEscape Mode Entry Command Error\n");
if (err & (1 << 4))
DSSERR("\t\tLP Transmit Sync Error\n");
if (err & (1 << 5))
DSSERR("\t\tHS Receive Timeout Error\n");
if (err & (1 << 6))
DSSERR("\t\tFalse Control Error\n");
if (err & (1 << 7))
DSSERR("\t\t(reserved7)\n");
if (err & (1 << 8))
DSSERR("\t\tECC Error, single-bit (corrected)\n");
if (err & (1 << 9))
DSSERR("\t\tECC Error, multi-bit (not corrected)\n");
if (err & (1 << 10))
DSSERR("\t\tChecksum Error\n");
if (err & (1 << 11))
DSSERR("\t\tData type not recognized\n");
if (err & (1 << 12))
DSSERR("\t\tInvalid VC ID\n");
if (err & (1 << 13))
DSSERR("\t\tInvalid Transmission Length\n");
if (err & (1 << 14))
DSSERR("\t\t(reserved14)\n");
if (err & (1 << 15))
DSSERR("\t\tDSI Protocol Violation\n");
}
static u16 dsi_vc_flush_receive_data(int channel)
{
/* RX_FIFO_NOT_EMPTY */
while (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
u32 val;
u8 dt;
val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
DSSERR("\trawval %#08x\n", val);
dt = FLD_GET(val, 5, 0);
if (dt == DSI_DT_RX_ACK_WITH_ERR) {
u16 err = FLD_GET(val, 23, 8);
dsi_show_rx_ack_with_err(err);
} else if (dt == DSI_DT_RX_SHORT_READ_1) {
DSSERR("\tDCS short response, 1 byte: %#x\n",
FLD_GET(val, 23, 8));
} else if (dt == DSI_DT_RX_SHORT_READ_2) {
DSSERR("\tDCS short response, 2 byte: %#x\n",
FLD_GET(val, 23, 8));
} else if (dt == DSI_DT_RX_DCS_LONG_READ) {
DSSERR("\tDCS long response, len %d\n",
FLD_GET(val, 23, 8));
dsi_vc_flush_long_data(channel);
} else {
DSSERR("\tunknown datatype 0x%02x\n", dt);
}
}
return 0;
}
static int dsi_vc_send_bta(int channel)
{
if (dsi.debug_write || dsi.debug_read)
DSSDBG("dsi_vc_send_bta %d\n", channel);
WARN_ON(!dsi_bus_is_locked());
if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
dsi_vc_flush_receive_data(channel);
}
REG_FLD_MOD(DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
return 0;
}
int dsi_vc_send_bta_sync(int channel)
{
int r = 0;
u32 err;
INIT_COMPLETION(dsi.bta_completion);
dsi_vc_enable_bta_irq(channel);
r = dsi_vc_send_bta(channel);
if (r)
goto err;
if (wait_for_completion_timeout(&dsi.bta_completion,
msecs_to_jiffies(500)) == 0) {
DSSERR("Failed to receive BTA\n");
r = -EIO;
goto err;
}
err = dsi_get_errors();
if (err) {
DSSERR("Error while sending BTA: %x\n", err);
r = -EIO;
goto err;
}
err:
dsi_vc_disable_bta_irq(channel);
return r;
}
EXPORT_SYMBOL(dsi_vc_send_bta_sync);
static inline void dsi_vc_write_long_header(int channel, u8 data_type,
u16 len, u8 ecc)
{
u32 val;
u8 data_id;
WARN_ON(!dsi_bus_is_locked());
data_id = data_type | channel << 6;
val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
FLD_VAL(ecc, 31, 24);
dsi_write_reg(DSI_VC_LONG_PACKET_HEADER(channel), val);
}
static inline void dsi_vc_write_long_payload(int channel,
u8 b1, u8 b2, u8 b3, u8 b4)
{
u32 val;
val = b4 << 24 | b3 << 16 | b2 << 8 | b1 << 0;
/* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
b1, b2, b3, b4, val); */
dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
}
static int dsi_vc_send_long(int channel, u8 data_type, u8 *data, u16 len,
u8 ecc)
{
/*u32 val; */
int i;
u8 *p;
int r = 0;
u8 b1, b2, b3, b4;
if (dsi.debug_write)
DSSDBG("dsi_vc_send_long, %d bytes\n", len);
/* len + header */
if (dsi.vc[channel].fifo_size * 32 * 4 < len + 4) {
DSSERR("unable to send long packet: packet too long.\n");
return -EINVAL;
}
dsi_vc_config_l4(channel);
dsi_vc_write_long_header(channel, data_type, len, ecc);
p = data;
for (i = 0; i < len >> 2; i++) {
if (dsi.debug_write)
DSSDBG("\tsending full packet %d\n", i);
b1 = *p++;
b2 = *p++;
b3 = *p++;
b4 = *p++;
dsi_vc_write_long_payload(channel, b1, b2, b3, b4);
}
i = len % 4;
if (i) {
b1 = 0; b2 = 0; b3 = 0;
if (dsi.debug_write)
DSSDBG("\tsending remainder bytes %d\n", i);
switch (i) {
case 3:
b1 = *p++;
b2 = *p++;
b3 = *p++;
break;
case 2:
b1 = *p++;
b2 = *p++;
break;
case 1:
b1 = *p++;
break;
}
dsi_vc_write_long_payload(channel, b1, b2, b3, 0);
}
return r;
}
static int dsi_vc_send_short(int channel, u8 data_type, u16 data, u8 ecc)
{
u32 r;
u8 data_id;
WARN_ON(!dsi_bus_is_locked());
if (dsi.debug_write)
DSSDBG("dsi_vc_send_short(ch%d, dt %#x, b1 %#x, b2 %#x)\n",
channel,
data_type, data & 0xff, (data >> 8) & 0xff);
dsi_vc_config_l4(channel);
if (FLD_GET(dsi_read_reg(DSI_VC_CTRL(channel)), 16, 16)) {
DSSERR("ERROR FIFO FULL, aborting transfer\n");
return -EINVAL;
}
data_id = data_type | channel << 6;
r = (data_id << 0) | (data << 8) | (ecc << 24);
dsi_write_reg(DSI_VC_SHORT_PACKET_HEADER(channel), r);
return 0;
}
int dsi_vc_send_null(int channel)
{
u8 nullpkg[] = {0, 0, 0, 0};
return dsi_vc_send_long(channel, DSI_DT_NULL_PACKET, nullpkg, 4, 0);
}
EXPORT_SYMBOL(dsi_vc_send_null);
int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len)
{
int r;
BUG_ON(len == 0);
if (len == 1) {
r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_0,
data[0], 0);
} else if (len == 2) {
r = dsi_vc_send_short(channel, DSI_DT_DCS_SHORT_WRITE_1,
data[0] | (data[1] << 8), 0);
} else {
/* 0x39 = DCS Long Write */
r = dsi_vc_send_long(channel, DSI_DT_DCS_LONG_WRITE,
data, len, 0);
}
return r;
}
EXPORT_SYMBOL(dsi_vc_dcs_write_nosync);
int dsi_vc_dcs_write(int channel, u8 *data, int len)
{
int r;
r = dsi_vc_dcs_write_nosync(channel, data, len);
if (r)
goto err;
r = dsi_vc_send_bta_sync(channel);
if (r)
goto err;
if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) { /* RX_FIFO_NOT_EMPTY */
DSSERR("rx fifo not empty after write, dumping data:\n");
dsi_vc_flush_receive_data(channel);
r = -EIO;
goto err;
}
return 0;
err:
DSSERR("dsi_vc_dcs_write(ch %d, cmd 0x%02x, len %d) failed\n",
channel, data[0], len);
return r;
}
EXPORT_SYMBOL(dsi_vc_dcs_write);
int dsi_vc_dcs_write_0(int channel, u8 dcs_cmd)
{
return dsi_vc_dcs_write(channel, &dcs_cmd, 1);
}
EXPORT_SYMBOL(dsi_vc_dcs_write_0);
int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param)
{
u8 buf[2];
buf[0] = dcs_cmd;
buf[1] = param;
return dsi_vc_dcs_write(channel, buf, 2);
}
EXPORT_SYMBOL(dsi_vc_dcs_write_1);
int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen)
{
u32 val;
u8 dt;
int r;
if (dsi.debug_read)
DSSDBG("dsi_vc_dcs_read(ch%d, dcs_cmd %x)\n", channel, dcs_cmd);
r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
if (r)
goto err;
r = dsi_vc_send_bta_sync(channel);
if (r)
goto err;
/* RX_FIFO_NOT_EMPTY */
if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
DSSERR("RX fifo empty when trying to read.\n");
r = -EIO;
goto err;
}
val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
if (dsi.debug_read)
DSSDBG("\theader: %08x\n", val);
dt = FLD_GET(val, 5, 0);
if (dt == DSI_DT_RX_ACK_WITH_ERR) {
u16 err = FLD_GET(val, 23, 8);
dsi_show_rx_ack_with_err(err);
r = -EIO;
goto err;
} else if (dt == DSI_DT_RX_SHORT_READ_1) {
u8 data = FLD_GET(val, 15, 8);
if (dsi.debug_read)
DSSDBG("\tDCS short response, 1 byte: %02x\n", data);
if (buflen < 1) {
r = -EIO;
goto err;
}
buf[0] = data;
return 1;
} else if (dt == DSI_DT_RX_SHORT_READ_2) {
u16 data = FLD_GET(val, 23, 8);
if (dsi.debug_read)
DSSDBG("\tDCS short response, 2 byte: %04x\n", data);
if (buflen < 2) {
r = -EIO;
goto err;
}
buf[0] = data & 0xff;
buf[1] = (data >> 8) & 0xff;
return 2;
} else if (dt == DSI_DT_RX_DCS_LONG_READ) {
int w;
int len = FLD_GET(val, 23, 8);
if (dsi.debug_read)
DSSDBG("\tDCS long response, len %d\n", len);
if (len > buflen) {
r = -EIO;
goto err;
}
/* two byte checksum ends the packet, not included in len */
for (w = 0; w < len + 2;) {
int b;
val = dsi_read_reg(DSI_VC_SHORT_PACKET_HEADER(channel));
if (dsi.debug_read)
DSSDBG("\t\t%02x %02x %02x %02x\n",
(val >> 0) & 0xff,
(val >> 8) & 0xff,
(val >> 16) & 0xff,
(val >> 24) & 0xff);
for (b = 0; b < 4; ++b) {
if (w < len)
buf[w] = (val >> (b * 8)) & 0xff;
/* we discard the 2 byte checksum */
++w;
}
}
return len;
} else {
DSSERR("\tunknown datatype 0x%02x\n", dt);
r = -EIO;
goto err;
}
BUG();
err:
DSSERR("dsi_vc_dcs_read(ch %d, cmd 0x%02x) failed\n",
channel, dcs_cmd);
return r;
}
EXPORT_SYMBOL(dsi_vc_dcs_read);
int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
{
int r;
r = dsi_vc_dcs_read(channel, dcs_cmd, data, 1);
if (r < 0)
return r;
if (r != 1)
return -EIO;
return 0;
}
EXPORT_SYMBOL(dsi_vc_dcs_read_1);
int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u8 *data1, u8 *data2)
{
u8 buf[2];
int r;
r = dsi_vc_dcs_read(channel, dcs_cmd, buf, 2);
if (r < 0)
return r;
if (r != 2)
return -EIO;
*data1 = buf[0];
*data2 = buf[1];
return 0;
}
EXPORT_SYMBOL(dsi_vc_dcs_read_2);
int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
{
return dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
len, 0);
}
EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
static void dsi_set_lp_rx_timeout(unsigned ticks, bool x4, bool x16)
{
unsigned long fck;
unsigned long total_ticks;
u32 r;
BUG_ON(ticks > 0x1fff);
/* ticks in DSI_FCK */
fck = dsi_fclk_rate();
r = dsi_read_reg(DSI_TIMING2);
r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* LP_RX_TO_X16 */
r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* LP_RX_TO_X4 */
r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
dsi_write_reg(DSI_TIMING2, r);
total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
DSSDBG("LP_RX_TO %lu ticks (%#x%s%s) = %lu ns\n",
total_ticks,
ticks, x4 ? " x4" : "", x16 ? " x16" : "",
(total_ticks * 1000) / (fck / 1000 / 1000));
}
static void dsi_set_ta_timeout(unsigned ticks, bool x8, bool x16)
{
unsigned long fck;
unsigned long total_ticks;
u32 r;
BUG_ON(ticks > 0x1fff);
/* ticks in DSI_FCK */
fck = dsi_fclk_rate();
r = dsi_read_reg(DSI_TIMING1);
r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* TA_TO_X16 */
r = FLD_MOD(r, x8 ? 1 : 0, 29, 29); /* TA_TO_X8 */
r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
dsi_write_reg(DSI_TIMING1, r);
total_ticks = ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1);
DSSDBG("TA_TO %lu ticks (%#x%s%s) = %lu ns\n",
total_ticks,
ticks, x8 ? " x8" : "", x16 ? " x16" : "",
(total_ticks * 1000) / (fck / 1000 / 1000));
}
static void dsi_set_stop_state_counter(unsigned ticks, bool x4, bool x16)
{
unsigned long fck;
unsigned long total_ticks;
u32 r;
BUG_ON(ticks > 0x1fff);
/* ticks in DSI_FCK */
fck = dsi_fclk_rate();
r = dsi_read_reg(DSI_TIMING1);
r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
r = FLD_MOD(r, x16 ? 1 : 0, 14, 14); /* STOP_STATE_X16_IO */
r = FLD_MOD(r, x4 ? 1 : 0, 13, 13); /* STOP_STATE_X4_IO */
r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
dsi_write_reg(DSI_TIMING1, r);
total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
DSSDBG("STOP_STATE_COUNTER %lu ticks (%#x%s%s) = %lu ns\n",
total_ticks,
ticks, x4 ? " x4" : "", x16 ? " x16" : "",
(total_ticks * 1000) / (fck / 1000 / 1000));
}
static void dsi_set_hs_tx_timeout(unsigned ticks, bool x4, bool x16)
{
unsigned long fck;
unsigned long total_ticks;
u32 r;
BUG_ON(ticks > 0x1fff);
/* ticks in TxByteClkHS */
fck = dsi_get_txbyteclkhs();
r = dsi_read_reg(DSI_TIMING2);
r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
r = FLD_MOD(r, x16 ? 1 : 0, 30, 30); /* HS_TX_TO_X16 */
r = FLD_MOD(r, x4 ? 1 : 0, 29, 29); /* HS_TX_TO_X8 (4 really) */
r = FLD_MOD(r, ticks, 28, 16); /* HS_TX_TO_COUNTER */
dsi_write_reg(DSI_TIMING2, r);
total_ticks = ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1);
DSSDBG("HS_TX_TO %lu ticks (%#x%s%s) = %lu ns\n",
total_ticks,
ticks, x4 ? " x4" : "", x16 ? " x16" : "",
(total_ticks * 1000) / (fck / 1000 / 1000));
}
static int dsi_proto_config(struct omap_dss_device *dssdev)
{
u32 r;
int buswidth = 0;
dsi_config_tx_fifo(DSI_FIFO_SIZE_32,
DSI_FIFO_SIZE_32,
DSI_FIFO_SIZE_32,
DSI_FIFO_SIZE_32);
dsi_config_rx_fifo(DSI_FIFO_SIZE_32,
DSI_FIFO_SIZE_32,
DSI_FIFO_SIZE_32,
DSI_FIFO_SIZE_32);
/* XXX what values for the timeouts? */
dsi_set_stop_state_counter(0x1000, false, false);
dsi_set_ta_timeout(0x1fff, true, true);
dsi_set_lp_rx_timeout(0x1fff, true, true);
dsi_set_hs_tx_timeout(0x1fff, true, true);
switch (dssdev->ctrl.pixel_size) {
case 16:
buswidth = 0;
break;
case 18:
buswidth = 1;
break;
case 24:
buswidth = 2;
break;
default:
BUG();
}
r = dsi_read_reg(DSI_CTRL);
r = FLD_MOD(r, 1, 1, 1); /* CS_RX_EN */
r = FLD_MOD(r, 1, 2, 2); /* ECC_RX_EN */
r = FLD_MOD(r, 1, 3, 3); /* TX_FIFO_ARBITRATION */
r = FLD_MOD(r, 1, 4, 4); /* VP_CLK_RATIO, always 1, see errata*/
r = FLD_MOD(r, buswidth, 7, 6); /* VP_DATA_BUS_WIDTH */
r = FLD_MOD(r, 0, 8, 8); /* VP_CLK_POL */
r = FLD_MOD(r, 2, 13, 12); /* LINE_BUFFER, 2 lines */
r = FLD_MOD(r, 1, 14, 14); /* TRIGGER_RESET_MODE */
r = FLD_MOD(r, 1, 19, 19); /* EOT_ENABLE */
r = FLD_MOD(r, 1, 24, 24); /* DCS_CMD_ENABLE */
r = FLD_MOD(r, 0, 25, 25); /* DCS_CMD_CODE, 1=start, 0=continue */
dsi_write_reg(DSI_CTRL, r);
dsi_vc_initial_config(0);
dsi_vc_initial_config(1);
dsi_vc_initial_config(2);
dsi_vc_initial_config(3);
return 0;
}
static void dsi_proto_timings(struct omap_dss_device *dssdev)
{
unsigned tlpx, tclk_zero, tclk_prepare, tclk_trail;
unsigned tclk_pre, tclk_post;
unsigned ths_prepare, ths_prepare_ths_zero, ths_zero;
unsigned ths_trail, ths_exit;
unsigned ddr_clk_pre, ddr_clk_post;
unsigned enter_hs_mode_lat, exit_hs_mode_lat;
unsigned ths_eot;
u32 r;
r = dsi_read_reg(DSI_DSIPHY_CFG0);
ths_prepare = FLD_GET(r, 31, 24);
ths_prepare_ths_zero = FLD_GET(r, 23, 16);
ths_zero = ths_prepare_ths_zero - ths_prepare;
ths_trail = FLD_GET(r, 15, 8);
ths_exit = FLD_GET(r, 7, 0);
r = dsi_read_reg(DSI_DSIPHY_CFG1);
tlpx = FLD_GET(r, 22, 16) * 2;
tclk_trail = FLD_GET(r, 15, 8);
tclk_zero = FLD_GET(r, 7, 0);
r = dsi_read_reg(DSI_DSIPHY_CFG2);
tclk_prepare = FLD_GET(r, 7, 0);
/* min 8*UI */
tclk_pre = 20;
/* min 60ns + 52*UI */
tclk_post = ns2ddr(60) + 26;
/* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */
if (dssdev->phy.dsi.data1_lane != 0 &&
dssdev->phy.dsi.data2_lane != 0)
ths_eot = 2;
else
ths_eot = 4;
ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,
4);
ddr_clk_post = DIV_ROUND_UP(tclk_post + ths_trail, 4) + ths_eot;
BUG_ON(ddr_clk_pre == 0 || ddr_clk_pre > 255);
BUG_ON(ddr_clk_post == 0 || ddr_clk_post > 255);
r = dsi_read_reg(DSI_CLK_TIMING);
r = FLD_MOD(r, ddr_clk_pre, 15, 8);
r = FLD_MOD(r, ddr_clk_post, 7, 0);
dsi_write_reg(DSI_CLK_TIMING, r);
DSSDBG("ddr_clk_pre %u, ddr_clk_post %u\n",
ddr_clk_pre,
ddr_clk_post);
enter_hs_mode_lat = 1 + DIV_ROUND_UP(tlpx, 4) +
DIV_ROUND_UP(ths_prepare, 4) +
DIV_ROUND_UP(ths_zero + 3, 4);
exit_hs_mode_lat = DIV_ROUND_UP(ths_trail + ths_exit, 4) + 1 + ths_eot;
r = FLD_VAL(enter_hs_mode_lat, 31, 16) |
FLD_VAL(exit_hs_mode_lat, 15, 0);
dsi_write_reg(DSI_VM_TIMING7, r);
DSSDBG("enter_hs_mode_lat %u, exit_hs_mode_lat %u\n",
enter_hs_mode_lat, exit_hs_mode_lat);
}
#define DSI_DECL_VARS \
int __dsi_cb = 0; u32 __dsi_cv = 0;
#define DSI_FLUSH(ch) \
if (__dsi_cb > 0) { \
/*DSSDBG("sending long packet %#010x\n", __dsi_cv);*/ \
dsi_write_reg(DSI_VC_LONG_PACKET_PAYLOAD(ch), __dsi_cv); \
__dsi_cb = __dsi_cv = 0; \
}
#define DSI_PUSH(ch, data) \
do { \
__dsi_cv |= (data) << (__dsi_cb * 8); \
/*DSSDBG("cv = %#010x, cb = %d\n", __dsi_cv, __dsi_cb);*/ \
if (++__dsi_cb > 3) \
DSI_FLUSH(ch); \
} while (0)
static int dsi_update_screen_l4(struct omap_dss_device *dssdev,
int x, int y, int w, int h)
{
/* Note: supports only 24bit colors in 32bit container */
int first = 1;
int fifo_stalls = 0;
int max_dsi_packet_size;
int max_data_per_packet;
int max_pixels_per_packet;
int pixels_left;
int bytespp = dssdev->ctrl.pixel_size / 8;
int scr_width;
u32 __iomem *data;
int start_offset;
int horiz_inc;
int current_x;
struct omap_overlay *ovl;
debug_irq = 0;
DSSDBG("dsi_update_screen_l4 (%d,%d %dx%d)\n",
x, y, w, h);
ovl = dssdev->manager->overlays[0];
if (ovl->info.color_mode != OMAP_DSS_COLOR_RGB24U)
return -EINVAL;
if (dssdev->ctrl.pixel_size != 24)
return -EINVAL;
scr_width = ovl->info.screen_width;
data = ovl->info.vaddr;
start_offset = scr_width * y + x;
horiz_inc = scr_width - w;
current_x = x;
/* We need header(4) + DCSCMD(1) + pixels(numpix*bytespp) bytes
* in fifo */
/* When using CPU, max long packet size is TX buffer size */
max_dsi_packet_size = dsi.vc[0].fifo_size * 32 * 4;
/* we seem to get better perf if we divide the tx fifo to half,
and while the other half is being sent, we fill the other half
max_dsi_packet_size /= 2; */
max_data_per_packet = max_dsi_packet_size - 4 - 1;
max_pixels_per_packet = max_data_per_packet / bytespp;
DSSDBG("max_pixels_per_packet %d\n", max_pixels_per_packet);
pixels_left = w * h;
DSSDBG("total pixels %d\n", pixels_left);
data += start_offset;
while (pixels_left > 0) {
/* 0x2c = write_memory_start */
/* 0x3c = write_memory_continue */
u8 dcs_cmd = first ? 0x2c : 0x3c;
int pixels;
DSI_DECL_VARS;
first = 0;
#if 1
/* using fifo not empty */
/* TX_FIFO_NOT_EMPTY */
while (FLD_GET(dsi_read_reg(DSI_VC_CTRL(0)), 5, 5)) {
fifo_stalls++;
if (fifo_stalls > 0xfffff) {
DSSERR("fifo stalls overflow, pixels left %d\n",
pixels_left);
dsi_if_enable(0);
return -EIO;
}
udelay(1);
}
#elif 1
/* using fifo emptiness */
while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 <
max_dsi_packet_size) {
fifo_stalls++;
if (fifo_stalls > 0xfffff) {
DSSERR("fifo stalls overflow, pixels left %d\n",
pixels_left);
dsi_if_enable(0);
return -EIO;
}
}
#else
while ((REG_GET(DSI_TX_FIFO_VC_EMPTINESS, 7, 0)+1)*4 == 0) {
fifo_stalls++;
if (fifo_stalls > 0xfffff) {
DSSERR("fifo stalls overflow, pixels left %d\n",
pixels_left);
dsi_if_enable(0);
return -EIO;
}
}
#endif
pixels = min(max_pixels_per_packet, pixels_left);
pixels_left -= pixels;
dsi_vc_write_long_header(0, DSI_DT_DCS_LONG_WRITE,
1 + pixels * bytespp, 0);
DSI_PUSH(0, dcs_cmd);
while (pixels-- > 0) {
u32 pix = __raw_readl(data++);
DSI_PUSH(0, (pix >> 16) & 0xff);
DSI_PUSH(0, (pix >> 8) & 0xff);
DSI_PUSH(0, (pix >> 0) & 0xff);
current_x++;
if (current_x == x+w) {
current_x = x;
data += horiz_inc;
}
}
DSI_FLUSH(0);
}
return 0;
}
static void dsi_update_screen_dispc(struct omap_dss_device *dssdev,
u16 x, u16 y, u16 w, u16 h)
{
unsigned bytespp;
unsigned bytespl;
unsigned bytespf;
unsigned total_len;
unsigned packet_payload;
unsigned packet_len;
u32 l;
int r;
const unsigned channel = dsi.update_channel;
/* line buffer is 1024 x 24bits */
/* XXX: for some reason using full buffer size causes considerable TX
* slowdown with update sizes that fill the whole buffer */
const unsigned line_buf_size = 1023 * 3;
DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
x, y, w, h);
dsi_vc_config_vp(channel);
bytespp = dssdev->ctrl.pixel_size / 8;
bytespl = w * bytespp;
bytespf = bytespl * h;
/* NOTE: packet_payload has to be equal to N * bytespl, where N is
* number of lines in a packet. See errata about VP_CLK_RATIO */
if (bytespf < line_buf_size)
packet_payload = bytespf;
else
packet_payload = (line_buf_size) / bytespl * bytespl;
packet_len = packet_payload + 1; /* 1 byte for DCS cmd */
total_len = (bytespf / packet_payload) * packet_len;
if (bytespf % packet_payload)
total_len += (bytespf % packet_payload) + 1;
l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
dsi_write_reg(DSI_VC_TE(channel), l);
dsi_vc_write_long_header(channel, DSI_DT_DCS_LONG_WRITE, packet_len, 0);
if (dsi.te_enabled)
l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
else
l = FLD_MOD(l, 1, 31, 31); /* TE_START */
dsi_write_reg(DSI_VC_TE(channel), l);
/* We put SIDLEMODE to no-idle for the duration of the transfer,
* because DSS interrupts are not capable of waking up the CPU and the
* framedone interrupt could be delayed for quite a long time. I think
* the same goes for any DSS interrupts, but for some reason I have not
* seen the problem anywhere else than here.
*/
dispc_disable_sidle();
dsi_perf_mark_start();
r = queue_delayed_work(dsi.workqueue, &dsi.framedone_timeout_work,
msecs_to_jiffies(250));
BUG_ON(r == 0);
dss_start_update(dssdev);
if (dsi.te_enabled) {
/* disable LP_RX_TO, so that we can receive TE. Time to wait
* for TE is longer than the timer allows */
REG_FLD_MOD(DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
dsi_vc_send_bta(channel);
#ifdef DSI_CATCH_MISSING_TE
mod_timer(&dsi.te_timer, jiffies + msecs_to_jiffies(250));
#endif
}
}
#ifdef DSI_CATCH_MISSING_TE
static void dsi_te_timeout(unsigned long arg)
{
DSSERR("TE not received for 250ms!\n");
}
#endif
static void dsi_handle_framedone(int error)
{
const int channel = dsi.update_channel;
cancel_delayed_work(&dsi.framedone_timeout_work);
dsi_vc_disable_bta_irq(channel);
/* SIDLEMODE back to smart-idle */
dispc_enable_sidle();
dsi.bta_callback = NULL;
if (dsi.te_enabled) {
/* enable LP_RX_TO again after the TE */
REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
}
/* RX_FIFO_NOT_EMPTY */
if (REG_GET(DSI_VC_CTRL(channel), 20, 20)) {
DSSERR("Received error during frame transfer:\n");
dsi_vc_flush_receive_data(channel);
if (!error)
error = -EIO;
}
dsi.framedone_callback(error, dsi.framedone_data);
if (!error)
dsi_perf_show("DISPC");
}
static void dsi_framedone_timeout_work_callback(struct work_struct *work)
{
/* XXX While extremely unlikely, we could get FRAMEDONE interrupt after
* 250ms which would conflict with this timeout work. What should be
* done is first cancel the transfer on the HW, and then cancel the
* possibly scheduled framedone work. However, cancelling the transfer
* on the HW is buggy, and would probably require resetting the whole
* DSI */
DSSERR("Framedone not received for 250ms!\n");
dsi_handle_framedone(-ETIMEDOUT);
}
static void dsi_framedone_bta_callback(void)
{
dsi_handle_framedone(0);
#ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
dispc_fake_vsync_irq();
#endif
}
static void dsi_framedone_irq_callback(void *data, u32 mask)
{
const int channel = dsi.update_channel;
int r;
/* Note: We get FRAMEDONE when DISPC has finished sending pixels and
* turns itself off. However, DSI still has the pixels in its buffers,
* and is sending the data.
*/
if (dsi.te_enabled) {
/* enable LP_RX_TO again after the TE */
REG_FLD_MOD(DSI_TIMING2, 1, 15, 15); /* LP_RX_TO */
}
/* Send BTA after the frame. We need this for the TE to work, as TE
* trigger is only sent for BTAs without preceding packet. Thus we need
* to BTA after the pixel packets so that next BTA will cause TE
* trigger.
*
* This is not needed when TE is not in use, but we do it anyway to
* make sure that the transfer has been completed. It would be more
* optimal, but more complex, to wait only just before starting next
* transfer.
*
* Also, as there's no interrupt telling when the transfer has been
* done and the channel could be reconfigured, the only way is to
* busyloop until TE_SIZE is zero. With BTA we can do this
* asynchronously.
* */
dsi.bta_callback = dsi_framedone_bta_callback;
barrier();
dsi_vc_enable_bta_irq(channel);
r = dsi_vc_send_bta(channel);
if (r) {
DSSERR("BTA after framedone failed\n");
dsi_handle_framedone(-EIO);
}
}
int omap_dsi_prepare_update(struct omap_dss_device *dssdev,
u16 *x, u16 *y, u16 *w, u16 *h,
bool enlarge_update_area)
{
u16 dw, dh;
dssdev->driver->get_resolution(dssdev, &dw, &dh);
if (*x > dw || *y > dh)
return -EINVAL;
if (*x + *w > dw)
return -EINVAL;
if (*y + *h > dh)
return -EINVAL;
if (*w == 1)
return -EINVAL;
if (*w == 0 || *h == 0)
return -EINVAL;
dsi_perf_mark_setup();
if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
dss_setup_partial_planes(dssdev, x, y, w, h,
enlarge_update_area);
dispc_set_lcd_size(*w, *h);
}
return 0;
}
EXPORT_SYMBOL(omap_dsi_prepare_update);
int omap_dsi_update(struct omap_dss_device *dssdev,
int channel,
u16 x, u16 y, u16 w, u16 h,
void (*callback)(int, void *), void *data)
{
dsi.update_channel = channel;
if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
dsi.framedone_callback = callback;
dsi.framedone_data = data;
dsi.update_region.x = x;
dsi.update_region.y = y;
dsi.update_region.w = w;
dsi.update_region.h = h;
dsi.update_region.device = dssdev;
dsi_update_screen_dispc(dssdev, x, y, w, h);
} else {
dsi_update_screen_l4(dssdev, x, y, w, h);
dsi_perf_show("L4");
callback(0, data);
}
return 0;
}
EXPORT_SYMBOL(omap_dsi_update);
/* Display funcs */
static int dsi_display_init_dispc(struct omap_dss_device *dssdev)
{
int r;
r = omap_dispc_register_isr(dsi_framedone_irq_callback, NULL,
DISPC_IRQ_FRAMEDONE);
if (r) {
DSSERR("can't get FRAMEDONE irq\n");
return r;
}
dispc_set_lcd_display_type(OMAP_DSS_LCD_DISPLAY_TFT);
dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_DSI);
dispc_enable_fifohandcheck(1);
dispc_set_tft_data_lines(dssdev->ctrl.pixel_size);
{
struct omap_video_timings timings = {
.hsw = 1,
.hfp = 1,
.hbp = 1,
.vsw = 1,
.vfp = 0,
.vbp = 0,
};
dispc_set_lcd_timings(&timings);
}
return 0;
}
static void dsi_display_uninit_dispc(struct omap_dss_device *dssdev)
{
omap_dispc_unregister_isr(dsi_framedone_irq_callback, NULL,
DISPC_IRQ_FRAMEDONE);
}
static int dsi_configure_dsi_clocks(struct omap_dss_device *dssdev)
{
struct dsi_clock_info cinfo;
int r;
/* we always use DSS2_FCK as input clock */
cinfo.use_dss2_fck = true;
cinfo.regn = dssdev->phy.dsi.div.regn;
cinfo.regm = dssdev->phy.dsi.div.regm;
cinfo.regm3 = dssdev->phy.dsi.div.regm3;
cinfo.regm4 = dssdev->phy.dsi.div.regm4;
r = dsi_calc_clock_rates(&cinfo);
if (r) {
DSSERR("Failed to calc dsi clocks\n");
return r;
}
r = dsi_pll_set_clock_div(&cinfo);
if (r) {
DSSERR("Failed to set dsi clocks\n");
return r;
}
return 0;
}
static int dsi_configure_dispc_clocks(struct omap_dss_device *dssdev)
{
struct dispc_clock_info dispc_cinfo;
int r;
unsigned long long fck;
fck = dsi_get_dsi1_pll_rate();
dispc_cinfo.lck_div = dssdev->phy.dsi.div.lck_div;
dispc_cinfo.pck_div = dssdev->phy.dsi.div.pck_div;
r = dispc_calc_clock_rates(fck, &dispc_cinfo);
if (r) {
DSSERR("Failed to calc dispc clocks\n");
return r;
}
r = dispc_set_clock_div(&dispc_cinfo);
if (r) {
DSSERR("Failed to set dispc clocks\n");
return r;
}
return 0;
}
static int dsi_display_init_dsi(struct omap_dss_device *dssdev)
{
int r;
_dsi_print_reset_status();
r = dsi_pll_init(dssdev, true, true);
if (r)
goto err0;
r = dsi_configure_dsi_clocks(dssdev);
if (r)
goto err1;
dss_select_dispc_clk_source(DSS_SRC_DSI1_PLL_FCLK);
dss_select_dsi_clk_source(DSS_SRC_DSI2_PLL_FCLK);
DSSDBG("PLL OK\n");
r = dsi_configure_dispc_clocks(dssdev);
if (r)
goto err2;
r = dsi_complexio_init(dssdev);
if (r)
goto err2;
_dsi_print_reset_status();
dsi_proto_timings(dssdev);
dsi_set_lp_clk_divisor(dssdev);
if (1)
_dsi_print_reset_status();
r = dsi_proto_config(dssdev);
if (r)
goto err3;
/* enable interface */
dsi_vc_enable(0, 1);
dsi_vc_enable(1, 1);
dsi_vc_enable(2, 1);
dsi_vc_enable(3, 1);
dsi_if_enable(1);
dsi_force_tx_stop_mode_io();
return 0;
err3:
dsi_complexio_uninit();
err2:
dss_select_dispc_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
dss_select_dsi_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
err1:
dsi_pll_uninit();
err0:
return r;
}
static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev)
{
/* disable interface */
dsi_if_enable(0);
dsi_vc_enable(0, 0);
dsi_vc_enable(1, 0);
dsi_vc_enable(2, 0);
dsi_vc_enable(3, 0);
dss_select_dispc_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
dss_select_dsi_clk_source(DSS_SRC_DSS1_ALWON_FCLK);
dsi_complexio_uninit();
dsi_pll_uninit();
}
static int dsi_core_init(void)
{
/* Autoidle */
REG_FLD_MOD(DSI_SYSCONFIG, 1, 0, 0);
/* ENWAKEUP */
REG_FLD_MOD(DSI_SYSCONFIG, 1, 2, 2);
/* SIDLEMODE smart-idle */
REG_FLD_MOD(DSI_SYSCONFIG, 2, 4, 3);
_dsi_initialize_irq();
return 0;
}
int omapdss_dsi_display_enable(struct omap_dss_device *dssdev)
{
int r = 0;
DSSDBG("dsi_display_enable\n");
WARN_ON(!dsi_bus_is_locked());
mutex_lock(&dsi.lock);
r = omap_dss_start_device(dssdev);
if (r) {
DSSERR("failed to start device\n");
goto err0;
}
enable_clocks(1);
dsi_enable_pll_clock(1);
r = _dsi_reset();
if (r)
goto err1;
dsi_core_init();
r = dsi_display_init_dispc(dssdev);
if (r)
goto err1;
r = dsi_display_init_dsi(dssdev);
if (r)
goto err2;
mutex_unlock(&dsi.lock);
return 0;
err2:
dsi_display_uninit_dispc(dssdev);
err1:
enable_clocks(0);
dsi_enable_pll_clock(0);
omap_dss_stop_device(dssdev);
err0:
mutex_unlock(&dsi.lock);
DSSDBG("dsi_display_enable FAILED\n");
return r;
}
EXPORT_SYMBOL(omapdss_dsi_display_enable);
void omapdss_dsi_display_disable(struct omap_dss_device *dssdev)
{
DSSDBG("dsi_display_disable\n");
WARN_ON(!dsi_bus_is_locked());
mutex_lock(&dsi.lock);
dsi_display_uninit_dispc(dssdev);
dsi_display_uninit_dsi(dssdev);
enable_clocks(0);
dsi_enable_pll_clock(0);
omap_dss_stop_device(dssdev);
mutex_unlock(&dsi.lock);
}
EXPORT_SYMBOL(omapdss_dsi_display_disable);
int omapdss_dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
{
dsi.te_enabled = enable;
return 0;
}
EXPORT_SYMBOL(omapdss_dsi_enable_te);
void dsi_get_overlay_fifo_thresholds(enum omap_plane plane,
u32 fifo_size, enum omap_burst_size *burst_size,
u32 *fifo_low, u32 *fifo_high)
{
unsigned burst_size_bytes;
*burst_size = OMAP_DSS_BURST_16x32;
burst_size_bytes = 16 * 32 / 8;
*fifo_high = fifo_size - burst_size_bytes;
*fifo_low = fifo_size - burst_size_bytes * 2;
}
int dsi_init_display(struct omap_dss_device *dssdev)
{
DSSDBG("DSI init\n");
/* XXX these should be figured out dynamically */
dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE |
OMAP_DSS_DISPLAY_CAP_TEAR_ELIM;
dsi.vc[0].dssdev = dssdev;
dsi.vc[1].dssdev = dssdev;
return 0;
}
void dsi_wait_dsi1_pll_active(void)
{
if (wait_for_bit_change(DSI_PLL_STATUS, 7, 1) != 1)
DSSERR("DSI1 PLL clock not active\n");
}
void dsi_wait_dsi2_pll_active(void)
{
if (wait_for_bit_change(DSI_PLL_STATUS, 8, 1) != 1)
DSSERR("DSI2 PLL clock not active\n");
}
int dsi_init(struct platform_device *pdev)
{
u32 rev;
int r;
spin_lock_init(&dsi.errors_lock);
dsi.errors = 0;
#ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
spin_lock_init(&dsi.irq_stats_lock);
dsi.irq_stats.last_reset = jiffies;
#endif
init_completion(&dsi.bta_completion);
mutex_init(&dsi.lock);
sema_init(&dsi.bus_lock, 1);
dsi.workqueue = create_singlethread_workqueue("dsi");
if (dsi.workqueue == NULL)
return -ENOMEM;
INIT_DELAYED_WORK_DEFERRABLE(&dsi.framedone_timeout_work,
dsi_framedone_timeout_work_callback);
#ifdef DSI_CATCH_MISSING_TE
init_timer(&dsi.te_timer);
dsi.te_timer.function = dsi_te_timeout;
dsi.te_timer.data = 0;
#endif
dsi.base = ioremap(DSI_BASE, DSI_SZ_REGS);
if (!dsi.base) {
DSSERR("can't ioremap DSI\n");
r = -ENOMEM;
goto err1;
}
dsi.vdds_dsi_reg = dss_get_vdds_dsi();
if (IS_ERR(dsi.vdds_dsi_reg)) {
iounmap(dsi.base);
DSSERR("can't get VDDS_DSI regulator\n");
r = PTR_ERR(dsi.vdds_dsi_reg);
goto err2;
}
enable_clocks(1);
rev = dsi_read_reg(DSI_REVISION);
printk(KERN_INFO "OMAP DSI rev %d.%d\n",
FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
enable_clocks(0);
return 0;
err2:
iounmap(dsi.base);
err1:
destroy_workqueue(dsi.workqueue);
return r;
}
void dsi_exit(void)
{
iounmap(dsi.base);
destroy_workqueue(dsi.workqueue);
DSSDBG("omap_dsi_exit\n");
}
Reference in a new issue View git blame Copy permalink