[PATCH 14/19] OMAP: DSS2: DSI driver

From: Tomi Valkeinen
Date: Mon Nov 09 2009 - 06:47:04 EST

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DSI (Display Serial Interface) driver implements MIPI DSI interface.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxx>
---
drivers/video/omap2/dss/dsi.c | 3708 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 3708 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/omap2/dss/dsi.c

diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c
new file mode 100644
index 0000000..ce93a22
--- /dev/null
+++ b/drivers/video/omap2/dss/dsi.c
@@ -0,0 +1,3708 @@
+/*
+ * linux/drivers/video/omap2/dss/dsi.c
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ * Author: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxx>
+ *
+ * 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/seq_file.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/kthread.h>
+#include <linux/wait.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_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 {
+ bool dirty;
+ u16 x, y, w, h;
+ struct omap_dss_device *device;
+};
+
+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;
+ int dest_per; /* destination peripheral 0-3 */
+ } vc[4];
+
+ struct mutex lock;
+ struct mutex bus_lock;
+
+ unsigned pll_locked;
+
+ struct completion bta_completion;
+
+ struct task_struct *thread;
+ wait_queue_head_t waitqueue;
+
+ spinlock_t update_lock;
+ bool framedone_received;
+ struct dsi_update_region update_region;
+ struct dsi_update_region active_update_region;
+ struct completion update_completion;
+
+ enum omap_dss_update_mode user_update_mode;
+ enum omap_dss_update_mode update_mode;
+ bool te_enabled;
+ bool use_ext_te;
+
+#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;
+ ktime_t perf_start_time_auto;
+ int perf_measure_frames;
+#endif
+ int debug_read;
+ int debug_write;
+} 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)
+{
+ mutex_lock(&dsi.bus_lock);
+}
+EXPORT_SYMBOL(dsi_bus_lock);
+
+void dsi_bus_unlock(void)
+{
+ mutex_unlock(&dsi.bus_lock);
+}
+EXPORT_SYMBOL(dsi_bus_unlock);
+
+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_mark_start_auto(void)
+{
+ dsi.perf_measure_frames = 0;
+ dsi.perf_start_time_auto = 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;
+
+ if (dsi.update_mode == OMAP_DSS_UPDATE_DISABLED)
+ 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.active_update_region.w *
+ dsi.active_update_region.h *
+ dsi.active_update_region.device->ctrl.pixel_size / 8;
+
+ if (dsi.update_mode == OMAP_DSS_UPDATE_AUTO) {
+ static u32 s_total_trans_us, s_total_setup_us;
+ static u32 s_min_trans_us = 0xffffffff, s_min_setup_us;
+ static u32 s_max_trans_us, s_max_setup_us;
+ const int numframes = 100;
+ ktime_t total_time_auto;
+ u32 total_time_auto_us;
+
+ dsi.perf_measure_frames++;
+
+ if (setup_us < s_min_setup_us)
+ s_min_setup_us = setup_us;
+
+ if (setup_us > s_max_setup_us)
+ s_max_setup_us = setup_us;
+
+ s_total_setup_us += setup_us;
+
+ if (trans_us < s_min_trans_us)
+ s_min_trans_us = trans_us;
+
+ if (trans_us > s_max_trans_us)
+ s_max_trans_us = trans_us;
+
+ s_total_trans_us += trans_us;
+
+ if (dsi.perf_measure_frames < numframes)
+ return;
+
+ total_time_auto = ktime_sub(t, dsi.perf_start_time_auto);
+ total_time_auto_us = (u32)ktime_to_us(total_time_auto);
+
+ printk(KERN_INFO "DSI(%s): %u fps, setup %u/%u/%u, "
+ "trans %u/%u/%u\n",
+ name,
+ 1000 * 1000 * numframes / total_time_auto_us,
+ s_min_setup_us,
+ s_max_setup_us,
+ s_total_setup_us / numframes,
+ s_min_trans_us,
+ s_max_trans_us,
+ s_total_trans_us / numframes);
+
+ s_total_setup_us = 0;
+ s_min_setup_us = 0xffffffff;
+ s_max_setup_us = 0;
+ s_total_trans_us = 0;
+ s_min_trans_us = 0xffffffff;
+ s_max_trans_us = 0;
+ dsi_perf_mark_start_auto();
+ } else {
+ 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_mark_start_auto()
+#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);
+
+ 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));
+
+ if (vcstatus & DSI_VC_IRQ_BTA)
+ complete(&dsi.bta_completion);
+
+ 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);
+
+ dsi_write_reg(DSI_COMPLEXIO_IRQ_STATUS, ciostatus);
+ /* flush posted write */
+ dsi_read_reg(DSI_COMPLEXIO_IRQ_STATUS);
+
+ DSSERR("DSI CIO error, cio irqstatus %x\n", ciostatus);
+ print_irq_status_cio(ciostatus);
+ }
+
+ dsi_write_reg(DSI_IRQSTATUS, irqstatus & ~DSI_IRQ_CHANNEL_MASK);
+ /* flush posted write */
+ dsi_read_reg(DSI_IRQSTATUS);
+}
+
+
+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);
+
+ /* XXX zonda responds incorrectly, causing control error:
+ Exit from LP-ESC mode to LP11 uses wrong transition states on the
+ data lines LP0 and LN0. */
+ dsi_write_reg(DSI_COMPLEXIO_IRQ_ENABLE,
+ -1 & (~DSI_CIO_IRQ_ERRCONTROL2));
+}
+
+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() == 0) {
+ /* 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) {
+ udelay(1);
+ if (t++ > 1000) {
+ DSSERR("Failed to set DSI PLL power mode to %d\n",
+ state);
+ return -ENODEV;
+ }
+ }
+
+ 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;
+ 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;
+ 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() == 0 ? "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() == 0 ? "off" : "on");
+
+ seq_printf(s, "- DSI -\n");
+
+ seq_printf(s, "dsi fclk source = %s\n",
+ dss_get_dsi_clk_source() == 0 ?
+ "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);
+}
+
+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) {
+ udelay(1);
+ if (t++ > 1000) {
+ DSSERR("failed to set complexio power state to "
+ "%d\n", state);
+ return -ENODEV;
+ }
+ }
+
+ 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 i = 0;
+
+ while (REG_GET(DSI_SYSSTATUS, 0, 0) == 0) {
+ if (i++ > 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 void dsi_vc_print_status(int channel)
+{
+ u32 r;
+
+ r = dsi_read_reg(DSI_VC_CTRL(channel));
+ DSSDBG("vc %d: TX_FIFO_NOT_EMPTY %d, BTA_EN %d, VC_BUSY %d, "
+ "TX_FIFO_FULL %d, RX_FIFO_NOT_EMPTY %d, ",
+ channel,
+ FLD_GET(r, 5, 5),
+ FLD_GET(r, 6, 6),
+ FLD_GET(r, 15, 15),
+ FLD_GET(r, 16, 16),
+ FLD_GET(r, 20, 20));
+
+ r = dsi_read_reg(DSI_TX_FIFO_VC_EMPTINESS);
+ DSSDBG("EMPTINESS %d\n", (r >> (8 * channel)) & 0xff);
+}
+
+static int dsi_vc_enable(int channel, bool enable)
+{
+ if (dsi.update_mode != OMAP_DSS_UPDATE_AUTO)
+ 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 void dsi_vc_config_l4(int channel)
+{
+ if (dsi.vc[channel].mode == DSI_VC_MODE_L4)
+ return;
+
+ DSSDBGF("%d", channel);
+
+ dsi_vc_enable(channel, 0);
+
+ if (REG_GET(DSI_VC_CTRL(channel), 15, 15)) /* VC_BUSY */
+ DSSERR("vc(%d) busy when trying to config for L4\n", channel);
+
+ 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;
+}
+
+static void dsi_vc_config_vp(int channel)
+{
+ if (dsi.vc[channel].mode == DSI_VC_MODE_VP)
+ return;
+
+ DSSDBGF("%d", channel);
+
+ dsi_vc_enable(channel, 0);
+
+ if (REG_GET(DSI_VC_CTRL(channel), 15, 15)) /* VC_BUSY */
+ DSSERR("vc(%d) busy when trying to config for VP\n", channel);
+
+ 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;
+}
+
+
+static void dsi_vc_enable_hs(int channel, bool enable)
+{
+ DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
+
+ 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();
+}
+
+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));
+ DSSDBG("\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) {
+ DSSDBG("\tDCS short response, 1 byte: %#x\n",
+ FLD_GET(val, 23, 8));
+ } else if (dt == DSI_DT_RX_SHORT_READ_2) {
+ DSSDBG("\tDCS short response, 2 byte: %#x\n",
+ FLD_GET(val, 23, 8));
+ } else if (dt == DSI_DT_RX_DCS_LONG_READ) {
+ DSSDBG("\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.update_mode != OMAP_DSS_UPDATE_AUTO &&
+ (dsi.debug_write || dsi.debug_read))
+ DSSDBG("dsi_vc_send_bta %d\n", channel);
+
+ WARN_ON(!mutex_is_locked(&dsi.bus_lock));
+
+ 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(!mutex_is_locked(&dsi.bus_lock));
+
+ /*data_id = data_type | channel << 6; */
+ data_id = data_type | dsi.vc[channel].dest_per << 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);
+
+ /*dsi_vc_print_status(0); */
+
+ p = data;
+ for (i = 0; i < len >> 2; i++) {
+ if (dsi.debug_write)
+ DSSDBG("\tsending full packet %d\n", i);
+ /*dsi_vc_print_status(0); */
+
+ 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(!mutex_is_locked(&dsi.bus_lock));
+
+ 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(0, 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)
+ return r;
+
+ r = dsi_vc_send_bta_sync(channel);
+
+ return r;
+}
+EXPORT_SYMBOL(dsi_vc_dcs_write);
+
+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 %u)\n", channel, dcs_cmd);
+
+ r = dsi_vc_send_short(channel, DSI_DT_DCS_READ, dcs_cmd, 0);
+ if (r)
+ return r;
+
+ r = dsi_vc_send_bta_sync(channel);
+ if (r)
+ return r;
+
+ /* RX_FIFO_NOT_EMPTY */
+ if (REG_GET(DSI_VC_CTRL(channel), 20, 20) == 0) {
+ DSSERR("RX fifo empty when trying to read.\n");
+ return -EIO;
+ }
+
+ 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);
+ return -EIO;
+
+ } 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)
+ return -EIO;
+
+ 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)
+ return -EIO;
+
+ 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)
+ return -EIO;
+
+ /* 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);
+ return -EIO;
+ }
+}
+EXPORT_SYMBOL(dsi_vc_dcs_read);
+
+
+int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
+{
+ int r;
+ r = dsi_vc_send_short(channel, DSI_DT_SET_MAX_RET_PKG_SIZE,
+ len, 0);
+
+ if (r)
+ return r;
+
+ r = dsi_vc_send_bta_sync(channel);
+
+ return r;
+}
+EXPORT_SYMBOL(dsi_vc_set_max_rx_packet_size);
+
+static void dsi_set_lp_rx_timeout(unsigned long ns)
+{
+ u32 r;
+ unsigned x4, x16;
+ unsigned long fck;
+ unsigned long ticks;
+
+ /* ticks in DSI_FCK */
+
+ fck = dsi_fclk_rate();
+ ticks = (fck / 1000 / 1000) * ns / 1000;
+ x4 = 0;
+ x16 = 0;
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / 4;
+ x4 = 1;
+ x16 = 0;
+ }
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / 16;
+ x4 = 0;
+ x16 = 1;
+ }
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / (4 * 16);
+ x4 = 1;
+ x16 = 1;
+ }
+
+ if (ticks > 0x1fff) {
+ DSSWARN("LP_TX_TO over limit, setting it to max\n");
+ ticks = 0x1fff;
+ x4 = 1;
+ x16 = 1;
+ }
+
+ r = dsi_read_reg(DSI_TIMING2);
+ r = FLD_MOD(r, 1, 15, 15); /* LP_RX_TO */
+ r = FLD_MOD(r, x16, 14, 14); /* LP_RX_TO_X16 */
+ r = FLD_MOD(r, x4, 13, 13); /* LP_RX_TO_X4 */
+ r = FLD_MOD(r, ticks, 12, 0); /* LP_RX_COUNTER */
+ dsi_write_reg(DSI_TIMING2, r);
+
+ DSSDBG("LP_RX_TO %lu ns (%#lx ticks%s%s)\n",
+ (ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1) * 1000) /
+ (fck / 1000 / 1000),
+ ticks, x4 ? " x4" : "", x16 ? " x16" : "");
+}
+
+static void dsi_set_ta_timeout(unsigned long ns)
+{
+ u32 r;
+ unsigned x8, x16;
+ unsigned long fck;
+ unsigned long ticks;
+
+ /* ticks in DSI_FCK */
+ fck = dsi_fclk_rate();
+ ticks = (fck / 1000 / 1000) * ns / 1000;
+ x8 = 0;
+ x16 = 0;
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / 8;
+ x8 = 1;
+ x16 = 0;
+ }
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / 16;
+ x8 = 0;
+ x16 = 1;
+ }
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / (8 * 16);
+ x8 = 1;
+ x16 = 1;
+ }
+
+ if (ticks > 0x1fff) {
+ DSSWARN("TA_TO over limit, setting it to max\n");
+ ticks = 0x1fff;
+ x8 = 1;
+ x16 = 1;
+ }
+
+ r = dsi_read_reg(DSI_TIMING1);
+ r = FLD_MOD(r, 1, 31, 31); /* TA_TO */
+ r = FLD_MOD(r, x16, 30, 30); /* TA_TO_X16 */
+ r = FLD_MOD(r, x8, 29, 29); /* TA_TO_X8 */
+ r = FLD_MOD(r, ticks, 28, 16); /* TA_TO_COUNTER */
+ dsi_write_reg(DSI_TIMING1, r);
+
+ DSSDBG("TA_TO %lu ns (%#lx ticks%s%s)\n",
+ (ticks * (x16 ? 16 : 1) * (x8 ? 8 : 1) * 1000) /
+ (fck / 1000 / 1000),
+ ticks, x8 ? " x8" : "", x16 ? " x16" : "");
+}
+
+static void dsi_set_stop_state_counter(unsigned long ns)
+{
+ u32 r;
+ unsigned x4, x16;
+ unsigned long fck;
+ unsigned long ticks;
+
+ /* ticks in DSI_FCK */
+
+ fck = dsi_fclk_rate();
+ ticks = (fck / 1000 / 1000) * ns / 1000;
+ x4 = 0;
+ x16 = 0;
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / 4;
+ x4 = 1;
+ x16 = 0;
+ }
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / 16;
+ x4 = 0;
+ x16 = 1;
+ }
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / (4 * 16);
+ x4 = 1;
+ x16 = 1;
+ }
+
+ if (ticks > 0x1fff) {
+ DSSWARN("STOP_STATE_COUNTER_IO over limit, "
+ "setting it to max\n");
+ ticks = 0x1fff;
+ x4 = 1;
+ x16 = 1;
+ }
+
+ r = dsi_read_reg(DSI_TIMING1);
+ r = FLD_MOD(r, 1, 15, 15); /* FORCE_TX_STOP_MODE_IO */
+ r = FLD_MOD(r, x16, 14, 14); /* STOP_STATE_X16_IO */
+ r = FLD_MOD(r, x4, 13, 13); /* STOP_STATE_X4_IO */
+ r = FLD_MOD(r, ticks, 12, 0); /* STOP_STATE_COUNTER_IO */
+ dsi_write_reg(DSI_TIMING1, r);
+
+ DSSDBG("STOP_STATE_COUNTER %lu ns (%#lx ticks%s%s)\n",
+ (ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1) * 1000) /
+ (fck / 1000 / 1000),
+ ticks, x4 ? " x4" : "", x16 ? " x16" : "");
+}
+
+static void dsi_set_hs_tx_timeout(unsigned long ns)
+{
+ u32 r;
+ unsigned x4, x16;
+ unsigned long fck;
+ unsigned long ticks;
+
+ /* ticks in TxByteClkHS */
+
+ fck = dsi_get_txbyteclkhs();
+ ticks = (fck / 1000 / 1000) * ns / 1000;
+ x4 = 0;
+ x16 = 0;
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / 4;
+ x4 = 1;
+ x16 = 0;
+ }
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / 16;
+ x4 = 0;
+ x16 = 1;
+ }
+
+ if (ticks > 0x1fff) {
+ ticks = (fck / 1000 / 1000) * ns / 1000 / (4 * 16);
+ x4 = 1;
+ x16 = 1;
+ }
+
+ if (ticks > 0x1fff) {
+ DSSWARN("HS_TX_TO over limit, setting it to max\n");
+ ticks = 0x1fff;
+ x4 = 1;
+ x16 = 1;
+ }
+
+ r = dsi_read_reg(DSI_TIMING2);
+ r = FLD_MOD(r, 1, 31, 31); /* HS_TX_TO */
+ r = FLD_MOD(r, x16, 30, 30); /* HS_TX_TO_X16 */
+ r = FLD_MOD(r, x4, 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);
+
+ DSSDBG("HS_TX_TO %lu ns (%#lx ticks%s%s)\n",
+ (ticks * (x16 ? 16 : 1) * (x4 ? 4 : 1) * 1000) /
+ (fck / 1000 / 1000),
+ ticks, x4 ? " x4" : "", x16 ? " x16" : "");
+}
+static int dsi_proto_config(struct omap_dss_device *dssdev)
+{
+ u32 r;
+ int buswidth = 0;
+
+ dsi_config_tx_fifo(DSI_FIFO_SIZE_128,
+ DSI_FIFO_SIZE_0,
+ DSI_FIFO_SIZE_0,
+ DSI_FIFO_SIZE_0);
+
+ dsi_config_rx_fifo(DSI_FIFO_SIZE_128,
+ DSI_FIFO_SIZE_0,
+ DSI_FIFO_SIZE_0,
+ DSI_FIFO_SIZE_0);
+
+ /* XXX what values for the timeouts? */
+ dsi_set_stop_state_counter(1000);
+ dsi_set_ta_timeout(6400000);
+ dsi_set_lp_rx_timeout(48000);
+ dsi_set_hs_tx_timeout(1000000);
+
+ 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);
+
+ /* set all vc targets to peripheral 0 */
+ dsi.vc[0].dest_per = 0;
+ dsi.vc[1].dest_per = 0;
+ dsi.vc[2].dest_per = 0;
+ dsi.vc[3].dest_per = 0;
+
+ 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)) {
+ udelay(1);
+ fifo_stalls++;
+ if (fifo_stalls > 0xfffff) {
+ DSSERR("fifo stalls overflow, pixels left %d\n",
+ pixels_left);
+ dsi_if_enable(0);
+ return -EIO;
+ }
+ }
+#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;
+ bool use_te_trigger;
+ const unsigned channel = 0;
+ /* 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;
+
+ use_te_trigger = dsi.te_enabled && !dsi.use_ext_te;
+
+ if (dsi.update_mode != OMAP_DSS_UPDATE_AUTO)
+ DSSDBG("dsi_update_screen_dispc(%d,%d %dx%d)\n",
+ x, y, w, h);
+
+ 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;
+
+ if (0)
+ dsi_vc_print_status(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 (use_te_trigger)
+ 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();
+
+ dss_start_update(dssdev);
+
+ if (use_te_trigger) {
+ /* 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_framedone_irq_callback(void *data, u32 mask)
+{
+ /* 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.
+ */
+
+ /* SIDLEMODE back to smart-idle */
+ dispc_enable_sidle();
+
+ dsi.framedone_received = true;
+ wake_up(&dsi.waitqueue);
+}
+
+static void dsi_set_update_region(struct omap_dss_device *dssdev,
+ u16 x, u16 y, u16 w, u16 h)
+{
+ spin_lock(&dsi.update_lock);
+ if (dsi.update_region.dirty) {
+ dsi.update_region.x = min(x, dsi.update_region.x);
+ dsi.update_region.y = min(y, dsi.update_region.y);
+ dsi.update_region.w = max(w, dsi.update_region.w);
+ dsi.update_region.h = max(h, dsi.update_region.h);
+ } else {
+ 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_region.dirty = true;
+
+ spin_unlock(&dsi.update_lock);
+
+}
+
+static int dsi_set_update_mode(struct omap_dss_device *dssdev,
+ enum omap_dss_update_mode mode)
+{
+ int r = 0;
+ int i;
+
+ WARN_ON(!mutex_is_locked(&dsi.bus_lock));
+
+ if (dsi.update_mode != mode) {
+ dsi.update_mode = mode;
+
+ /* Mark the overlays dirty, and do apply(), so that we get the
+ * overlays configured properly after update mode change. */
+ for (i = 0; i < omap_dss_get_num_overlays(); ++i) {
+ struct omap_overlay *ovl;
+ ovl = omap_dss_get_overlay(i);
+ if (ovl->manager == dssdev->manager)
+ ovl->info_dirty = true;
+ }
+
+ r = dssdev->manager->apply(dssdev->manager);
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE &&
+ mode == OMAP_DSS_UPDATE_AUTO) {
+ u16 w, h;
+
+ DSSDBG("starting auto update\n");
+
+ dssdev->get_resolution(dssdev, &w, &h);
+
+ dsi_set_update_region(dssdev, 0, 0, w, h);
+
+ dsi_perf_mark_start_auto();
+
+ wake_up(&dsi.waitqueue);
+ }
+ }
+
+ return r;
+}
+
+static int dsi_set_te(struct omap_dss_device *dssdev, bool enable)
+{
+ int r;
+ r = dssdev->driver->enable_te(dssdev, enable);
+ /* XXX for some reason, DSI TE breaks if we don't wait here.
+ * Panel bug? Needs more studying */
+ msleep(100);
+ return r;
+}
+
+static void dsi_handle_framedone(void)
+{
+ int r;
+ const int channel = 0;
+ bool use_te_trigger;
+
+ use_te_trigger = dsi.te_enabled && !dsi.use_ext_te;
+
+ if (dsi.update_mode != OMAP_DSS_UPDATE_AUTO)
+ DSSDBG("FRAMEDONE\n");
+
+ if (use_te_trigger) {
+ /* 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. */
+ r = dsi_vc_send_bta_sync(channel);
+ if (r)
+ DSSERR("BTA after framedone failed\n");
+
+ /* 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(0);
+ }
+
+#ifdef CONFIG_OMAP2_DSS_FAKE_VSYNC
+ dispc_fake_vsync_irq();
+#endif
+}
+
+static int dsi_update_thread(void *data)
+{
+ unsigned long timeout;
+ struct omap_dss_device *device;
+ u16 x, y, w, h;
+
+ while (1) {
+ bool sched;
+
+ wait_event_interruptible(dsi.waitqueue,
+ dsi.update_mode == OMAP_DSS_UPDATE_AUTO ||
+ (dsi.update_mode == OMAP_DSS_UPDATE_MANUAL &&
+ dsi.update_region.dirty == true) ||
+ kthread_should_stop());
+
+ if (kthread_should_stop())
+ break;
+
+ dsi_bus_lock();
+
+ if (dsi.update_mode == OMAP_DSS_UPDATE_DISABLED ||
+ kthread_should_stop()) {
+ dsi_bus_unlock();
+ break;
+ }
+
+ dsi_perf_mark_setup();
+
+ if (dsi.update_region.dirty) {
+ spin_lock(&dsi.update_lock);
+ dsi.active_update_region = dsi.update_region;
+ dsi.update_region.dirty = false;
+ spin_unlock(&dsi.update_lock);
+ }
+
+ device = dsi.active_update_region.device;
+ x = dsi.active_update_region.x;
+ y = dsi.active_update_region.y;
+ w = dsi.active_update_region.w;
+ h = dsi.active_update_region.h;
+
+ if (device->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
+
+ if (dsi.update_mode == OMAP_DSS_UPDATE_MANUAL)
+ dss_setup_partial_planes(device,
+ &x, &y, &w, &h);
+
+ dispc_set_lcd_size(w, h);
+ }
+
+ if (dsi.active_update_region.dirty) {
+ dsi.active_update_region.dirty = false;
+ /* XXX TODO we don't need to send the coords, if they
+ * are the same that are already programmed to the
+ * panel. That should speed up manual update a bit */
+ device->driver->setup_update(device, x, y, w, h);
+ }
+
+ dsi_perf_mark_start();
+
+ if (device->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
+ dsi_vc_config_vp(0);
+
+ if (dsi.te_enabled && dsi.use_ext_te)
+ device->driver->wait_for_te(device);
+
+ dsi.framedone_received = false;
+
+ dsi_update_screen_dispc(device, x, y, w, h);
+
+ /* wait for framedone */
+ timeout = msecs_to_jiffies(1000);
+ wait_event_timeout(dsi.waitqueue,
+ dsi.framedone_received == true,
+ timeout);
+
+ if (!dsi.framedone_received) {
+ DSSERR("framedone timeout\n");
+ DSSERR("failed update %d,%d %dx%d\n",
+ x, y, w, h);
+
+ dispc_enable_sidle();
+ dispc_enable_lcd_out(0);
+
+ dsi_reset_tx_fifo(0);
+ } else {
+ dsi_handle_framedone();
+ dsi_perf_show("DISPC");
+ }
+ } else {
+ dsi_update_screen_l4(device, x, y, w, h);
+ dsi_perf_show("L4");
+ }
+
+ sched = atomic_read(&dsi.bus_lock.count) < 0;
+
+ complete_all(&dsi.update_completion);
+
+ dsi_bus_unlock();
+
+ /* XXX We need to give others chance to get the bus lock. Is
+ * there a better way for this? */
+ if (dsi.update_mode == OMAP_DSS_UPDATE_AUTO && sched)
+ schedule_timeout_interruptible(1);
+ }
+
+ DSSDBG("update thread exiting\n");
+
+ return 0;
+}
+
+
+
+/* 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)
+ 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_clk_source(true, true);
+
+ 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_if_enable(1);
+ dsi_force_tx_stop_mode_io();
+
+ if (dssdev->driver->enable) {
+ r = dssdev->driver->enable(dssdev);
+ if (r)
+ goto err4;
+ }
+
+ /* enable high-speed after initial config */
+ dsi_vc_enable_hs(0, 1);
+
+ return 0;
+err4:
+ dsi_if_enable(0);
+err3:
+ dsi_complexio_uninit();
+err2:
+ dss_select_clk_source(false, false);
+err1:
+ dsi_pll_uninit();
+err0:
+ return r;
+}
+
+static void dsi_display_uninit_dsi(struct omap_dss_device *dssdev)
+{
+ if (dssdev->driver->disable)
+ dssdev->driver->disable(dssdev);
+
+ dss_select_clk_source(false, false);
+ 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;
+}
+
+static int dsi_display_enable(struct omap_dss_device *dssdev)
+{
+ int r = 0;
+
+ DSSDBG("dsi_display_enable\n");
+
+ mutex_lock(&dsi.lock);
+ dsi_bus_lock();
+
+ r = omap_dss_start_device(dssdev);
+ if (r) {
+ DSSERR("failed to start device\n");
+ goto err0;
+ }
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
+ DSSERR("dssdev already enabled\n");
+ r = -EINVAL;
+ goto err1;
+ }
+
+ enable_clocks(1);
+ dsi_enable_pll_clock(1);
+
+ r = _dsi_reset();
+ if (r)
+ goto err2;
+
+ dsi_core_init();
+
+ r = dsi_display_init_dispc(dssdev);
+ if (r)
+ goto err2;
+
+ r = dsi_display_init_dsi(dssdev);
+ if (r)
+ goto err3;
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ dsi.use_ext_te = dssdev->phy.dsi.ext_te;
+ r = dsi_set_te(dssdev, dsi.te_enabled);
+ if (r)
+ goto err4;
+
+ dsi_set_update_mode(dssdev, dsi.user_update_mode);
+
+ dsi_bus_unlock();
+ mutex_unlock(&dsi.lock);
+
+ return 0;
+
+err4:
+
+ dsi_display_uninit_dsi(dssdev);
+err3:
+ dsi_display_uninit_dispc(dssdev);
+err2:
+ enable_clocks(0);
+ dsi_enable_pll_clock(0);
+err1:
+ omap_dss_stop_device(dssdev);
+err0:
+ dsi_bus_unlock();
+ mutex_unlock(&dsi.lock);
+ DSSDBG("dsi_display_enable FAILED\n");
+ return r;
+}
+
+static void dsi_display_disable(struct omap_dss_device *dssdev)
+{
+ DSSDBG("dsi_display_disable\n");
+
+ mutex_lock(&dsi.lock);
+ dsi_bus_lock();
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED ||
+ dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED)
+ goto end;
+
+ dsi.update_mode = OMAP_DSS_UPDATE_DISABLED;
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+
+ dsi_display_uninit_dispc(dssdev);
+
+ dsi_display_uninit_dsi(dssdev);
+
+ enable_clocks(0);
+ dsi_enable_pll_clock(0);
+
+ omap_dss_stop_device(dssdev);
+end:
+ dsi_bus_unlock();
+ mutex_unlock(&dsi.lock);
+}
+
+static int dsi_display_suspend(struct omap_dss_device *dssdev)
+{
+ DSSDBG("dsi_display_suspend\n");
+
+ mutex_lock(&dsi.lock);
+ dsi_bus_lock();
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED ||
+ dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED)
+ goto end;
+
+ dsi.update_mode = OMAP_DSS_UPDATE_DISABLED;
+ dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+
+ dsi_display_uninit_dispc(dssdev);
+
+ dsi_display_uninit_dsi(dssdev);
+
+ enable_clocks(0);
+ dsi_enable_pll_clock(0);
+end:
+ dsi_bus_unlock();
+ mutex_unlock(&dsi.lock);
+
+ return 0;
+}
+
+static int dsi_display_resume(struct omap_dss_device *dssdev)
+{
+ int r;
+
+ DSSDBG("dsi_display_resume\n");
+
+ mutex_lock(&dsi.lock);
+ dsi_bus_lock();
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
+ DSSERR("dssdev not suspended\n");
+ r = -EINVAL;
+ 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;
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ r = dsi_set_te(dssdev, dsi.te_enabled);
+ if (r)
+ goto err2;
+
+ dsi_set_update_mode(dssdev, dsi.user_update_mode);
+
+ dsi_bus_unlock();
+ mutex_unlock(&dsi.lock);
+
+ return 0;
+
+err2:
+ dsi_display_uninit_dispc(dssdev);
+err1:
+ enable_clocks(0);
+ dsi_enable_pll_clock(0);
+err0:
+ dsi_bus_unlock();
+ mutex_unlock(&dsi.lock);
+ DSSDBG("dsi_display_resume FAILED\n");
+ return r;
+}
+
+static int dsi_display_update(struct omap_dss_device *dssdev,
+ u16 x, u16 y, u16 w, u16 h)
+{
+ int r = 0;
+ u16 dw, dh;
+
+ DSSDBG("dsi_display_update(%d,%d %dx%d)\n", x, y, w, h);
+
+ mutex_lock(&dsi.lock);
+
+ if (dsi.update_mode != OMAP_DSS_UPDATE_MANUAL)
+ goto end;
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+ goto end;
+
+ dssdev->get_resolution(dssdev, &dw, &dh);
+
+ if (x > dw || y > dh)
+ goto end;
+
+ if (x + w > dw)
+ w = dw - x;
+
+ if (y + h > dh)
+ h = dh - y;
+
+ if (w == 0 || h == 0)
+ goto end;
+
+ if (w == 1) {
+ r = -EINVAL;
+ goto end;
+ }
+
+ dsi_set_update_region(dssdev, x, y, w, h);
+
+ wake_up(&dsi.waitqueue);
+
+end:
+ mutex_unlock(&dsi.lock);
+
+ return r;
+}
+
+static int dsi_display_sync(struct omap_dss_device *dssdev)
+{
+ bool wait;
+
+ DSSDBG("dsi_display_sync()\n");
+
+ mutex_lock(&dsi.lock);
+ dsi_bus_lock();
+
+ if (dsi.update_mode == OMAP_DSS_UPDATE_MANUAL &&
+ dsi.update_region.dirty) {
+ INIT_COMPLETION(dsi.update_completion);
+ wait = true;
+ } else {
+ wait = false;
+ }
+
+ dsi_bus_unlock();
+ mutex_unlock(&dsi.lock);
+
+ if (wait)
+ wait_for_completion_interruptible(&dsi.update_completion);
+
+ DSSDBG("dsi_display_sync() done\n");
+ return 0;
+}
+
+static int dsi_display_set_update_mode(struct omap_dss_device *dssdev,
+ enum omap_dss_update_mode mode)
+{
+ int r = 0;
+
+ DSSDBGF("%d", mode);
+
+ mutex_lock(&dsi.lock);
+ dsi_bus_lock();
+
+ dsi.user_update_mode = mode;
+ r = dsi_set_update_mode(dssdev, mode);
+
+ dsi_bus_unlock();
+ mutex_unlock(&dsi.lock);
+
+ return r;
+}
+
+static enum omap_dss_update_mode dsi_display_get_update_mode(
+ struct omap_dss_device *dssdev)
+{
+ return dsi.update_mode;
+}
+
+
+static int dsi_display_enable_te(struct omap_dss_device *dssdev, bool enable)
+{
+ int r = 0;
+
+ DSSDBGF("%d", enable);
+
+ if (!dssdev->driver->enable_te)
+ return -ENOENT;
+
+ dsi_bus_lock();
+
+ dsi.te_enabled = enable;
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+ goto end;
+
+ r = dsi_set_te(dssdev, enable);
+end:
+ dsi_bus_unlock();
+
+ return r;
+}
+
+static int dsi_display_get_te(struct omap_dss_device *dssdev)
+{
+ return dsi.te_enabled;
+}
+
+static int dsi_display_set_rotate(struct omap_dss_device *dssdev, u8 rotate)
+{
+
+ DSSDBGF("%d", rotate);
+
+ if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
+ return -EINVAL;
+
+ dsi_bus_lock();
+ dssdev->driver->set_rotate(dssdev, rotate);
+ if (dsi.update_mode == OMAP_DSS_UPDATE_AUTO) {
+ u16 w, h;
+ /* the display dimensions may have changed, so set a new
+ * update region */
+ dssdev->get_resolution(dssdev, &w, &h);
+ dsi_set_update_region(dssdev, 0, 0, w, h);
+ }
+ dsi_bus_unlock();
+
+ return 0;
+}
+
+static u8 dsi_display_get_rotate(struct omap_dss_device *dssdev)
+{
+ if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
+ return 0;
+
+ return dssdev->driver->get_rotate(dssdev);
+}
+
+static int dsi_display_set_mirror(struct omap_dss_device *dssdev, bool mirror)
+{
+ DSSDBGF("%d", mirror);
+
+ if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
+ return -EINVAL;
+
+ dsi_bus_lock();
+ dssdev->driver->set_mirror(dssdev, mirror);
+ dsi_bus_unlock();
+
+ return 0;
+}
+
+static bool dsi_display_get_mirror(struct omap_dss_device *dssdev)
+{
+ if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
+ return 0;
+
+ return dssdev->driver->get_mirror(dssdev);
+}
+
+static int dsi_display_run_test(struct omap_dss_device *dssdev, int test_num)
+{
+ int r;
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+ return -EIO;
+
+ DSSDBGF("%d", test_num);
+
+ dsi_bus_lock();
+
+ /* run test first in low speed mode */
+ dsi_vc_enable_hs(0, 0);
+
+ if (dssdev->driver->run_test) {
+ r = dssdev->driver->run_test(dssdev, test_num);
+ if (r)
+ goto end;
+ }
+
+ /* then in high speed */
+ dsi_vc_enable_hs(0, 1);
+
+ if (dssdev->driver->run_test) {
+ r = dssdev->driver->run_test(dssdev, test_num);
+ if (r)
+ goto end;
+ }
+
+end:
+ dsi_vc_enable_hs(0, 1);
+
+ dsi_bus_unlock();
+
+ return r;
+}
+
+static int dsi_display_memory_read(struct omap_dss_device *dssdev,
+ void *buf, size_t size,
+ u16 x, u16 y, u16 w, u16 h)
+{
+ int r;
+
+ DSSDBGF("");
+
+ if (!dssdev->driver->memory_read)
+ return -EINVAL;
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+ return -EIO;
+
+ dsi_bus_lock();
+
+ r = dssdev->driver->memory_read(dssdev, buf, size,
+ x, y, w, h);
+
+ /* Memory read usually changes the update area. This will
+ * force the next update to re-set the update area */
+ dsi.active_update_region.dirty = true;
+
+ dsi_bus_unlock();
+
+ return r;
+}
+
+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 * 8;
+}
+
+int dsi_init_display(struct omap_dss_device *dssdev)
+{
+ DSSDBG("DSI init\n");
+
+ dssdev->enable = dsi_display_enable;
+ dssdev->disable = dsi_display_disable;
+ dssdev->suspend = dsi_display_suspend;
+ dssdev->resume = dsi_display_resume;
+ dssdev->update = dsi_display_update;
+ dssdev->sync = dsi_display_sync;
+ dssdev->set_update_mode = dsi_display_set_update_mode;
+ dssdev->get_update_mode = dsi_display_get_update_mode;
+ dssdev->enable_te = dsi_display_enable_te;
+ dssdev->get_te = dsi_display_get_te;
+
+ dssdev->get_rotate = dsi_display_get_rotate;
+ dssdev->set_rotate = dsi_display_set_rotate;
+
+ dssdev->get_mirror = dsi_display_get_mirror;
+ dssdev->set_mirror = dsi_display_set_mirror;
+
+ dssdev->run_test = dsi_display_run_test;
+ dssdev->memory_read = dsi_display_memory_read;
+
+ /* 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;
+}
+
+int dsi_init(struct platform_device *pdev)
+{
+ u32 rev;
+ int r;
+ struct sched_param param = {
+ .sched_priority = MAX_USER_RT_PRIO-1
+ };
+
+ spin_lock_init(&dsi.errors_lock);
+ dsi.errors = 0;
+
+ init_completion(&dsi.bta_completion);
+ init_completion(&dsi.update_completion);
+
+ dsi.thread = kthread_create(dsi_update_thread, NULL, "dsi");
+ if (IS_ERR(dsi.thread)) {
+ DSSERR("cannot create kthread\n");
+ r = PTR_ERR(dsi.thread);
+ goto err0;
+ }
+ sched_setscheduler(dsi.thread, SCHED_FIFO, &param);
+
+ init_waitqueue_head(&dsi.waitqueue);
+ spin_lock_init(&dsi.update_lock);
+
+ mutex_init(&dsi.lock);
+ mutex_init(&dsi.bus_lock);
+
+#ifdef DSI_CATCH_MISSING_TE
+ init_timer(&dsi.te_timer);
+ dsi.te_timer.function = dsi_te_timeout;
+ dsi.te_timer.data = 0;
+#endif
+
+ dsi.update_mode = OMAP_DSS_UPDATE_DISABLED;
+ dsi.user_update_mode = OMAP_DSS_UPDATE_DISABLED;
+
+ 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 = regulator_get(&pdev->dev, "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);
+
+ wake_up_process(dsi.thread);
+
+ return 0;
+err2:
+ iounmap(dsi.base);
+err1:
+ kthread_stop(dsi.thread);
+err0:
+ return r;
+}
+
+void dsi_exit(void)
+{
+ kthread_stop(dsi.thread);
+
+ regulator_put(dsi.vdds_dsi_reg);
+
+ iounmap(dsi.base);
+
+ DSSDBG("omap_dsi_exit\n");
+}
+
--
1.6.5.1

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