From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001
From: Yunhong Jiang <yunhong.jiang@intel.com>
Date: Tue, 4 Aug 2015 12:17:53 -0700
Subject: Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
---
 kernel/drivers/gpu/ipu-v3/ipu-di.c | 756 +++++++++++++++++++++++++++++++++++++
 1 file changed, 756 insertions(+)
 create mode 100644 kernel/drivers/gpu/ipu-v3/ipu-di.c

(limited to 'kernel/drivers/gpu/ipu-v3/ipu-di.c')

diff --git a/kernel/drivers/gpu/ipu-v3/ipu-di.c b/kernel/drivers/gpu/ipu-v3/ipu-di.c
new file mode 100644
index 000000000..2970c6bb6
--- /dev/null
+++ b/kernel/drivers/gpu/ipu-v3/ipu-di.c
@@ -0,0 +1,756 @@
+/*
+ * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
+ * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * 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.
+ */
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+
+#include <video/imx-ipu-v3.h>
+#include "ipu-prv.h"
+
+struct ipu_di {
+	void __iomem *base;
+	int id;
+	u32 module;
+	struct clk *clk_di;	/* display input clock */
+	struct clk *clk_ipu;	/* IPU bus clock */
+	struct clk *clk_di_pixel; /* resulting pixel clock */
+	bool inuse;
+	struct ipu_soc *ipu;
+};
+
+static DEFINE_MUTEX(di_mutex);
+
+struct di_sync_config {
+	int run_count;
+	int run_src;
+	int offset_count;
+	int offset_src;
+	int repeat_count;
+	int cnt_clr_src;
+	int cnt_polarity_gen_en;
+	int cnt_polarity_clr_src;
+	int cnt_polarity_trigger_src;
+	int cnt_up;
+	int cnt_down;
+};
+
+enum di_pins {
+	DI_PIN11 = 0,
+	DI_PIN12 = 1,
+	DI_PIN13 = 2,
+	DI_PIN14 = 3,
+	DI_PIN15 = 4,
+	DI_PIN16 = 5,
+	DI_PIN17 = 6,
+	DI_PIN_CS = 7,
+
+	DI_PIN_SER_CLK = 0,
+	DI_PIN_SER_RS = 1,
+};
+
+enum di_sync_wave {
+	DI_SYNC_NONE = 0,
+	DI_SYNC_CLK = 1,
+	DI_SYNC_INT_HSYNC = 2,
+	DI_SYNC_HSYNC = 3,
+	DI_SYNC_VSYNC = 4,
+	DI_SYNC_DE = 6,
+};
+
+#define SYNC_WAVE 0
+
+#define DI_GENERAL		0x0000
+#define DI_BS_CLKGEN0		0x0004
+#define DI_BS_CLKGEN1		0x0008
+#define DI_SW_GEN0(gen)		(0x000c + 4 * ((gen) - 1))
+#define DI_SW_GEN1(gen)		(0x0030 + 4 * ((gen) - 1))
+#define DI_STP_REP(gen)		(0x0148 + 4 * (((gen) - 1)/2))
+#define DI_SYNC_AS_GEN		0x0054
+#define DI_DW_GEN(gen)		(0x0058 + 4 * (gen))
+#define DI_DW_SET(gen, set)	(0x0088 + 4 * ((gen) + 0xc * (set)))
+#define DI_SER_CONF		0x015c
+#define DI_SSC			0x0160
+#define DI_POL			0x0164
+#define DI_AW0			0x0168
+#define DI_AW1			0x016c
+#define DI_SCR_CONF		0x0170
+#define DI_STAT			0x0174
+
+#define DI_SW_GEN0_RUN_COUNT(x)			((x) << 19)
+#define DI_SW_GEN0_RUN_SRC(x)			((x) << 16)
+#define DI_SW_GEN0_OFFSET_COUNT(x)		((x) << 3)
+#define DI_SW_GEN0_OFFSET_SRC(x)		((x) << 0)
+
+#define DI_SW_GEN1_CNT_POL_GEN_EN(x)		((x) << 29)
+#define DI_SW_GEN1_CNT_CLR_SRC(x)		((x) << 25)
+#define DI_SW_GEN1_CNT_POL_TRIGGER_SRC(x)	((x) << 12)
+#define DI_SW_GEN1_CNT_POL_CLR_SRC(x)		((x) << 9)
+#define DI_SW_GEN1_CNT_DOWN(x)			((x) << 16)
+#define DI_SW_GEN1_CNT_UP(x)			(x)
+#define DI_SW_GEN1_AUTO_RELOAD			(0x10000000)
+
+#define DI_DW_GEN_ACCESS_SIZE_OFFSET		24
+#define DI_DW_GEN_COMPONENT_SIZE_OFFSET		16
+
+#define DI_GEN_POLARITY_1			(1 << 0)
+#define DI_GEN_POLARITY_2			(1 << 1)
+#define DI_GEN_POLARITY_3			(1 << 2)
+#define DI_GEN_POLARITY_4			(1 << 3)
+#define DI_GEN_POLARITY_5			(1 << 4)
+#define DI_GEN_POLARITY_6			(1 << 5)
+#define DI_GEN_POLARITY_7			(1 << 6)
+#define DI_GEN_POLARITY_8			(1 << 7)
+#define DI_GEN_POLARITY_DISP_CLK		(1 << 17)
+#define DI_GEN_DI_CLK_EXT			(1 << 20)
+#define DI_GEN_DI_VSYNC_EXT			(1 << 21)
+
+#define DI_POL_DRDY_DATA_POLARITY		(1 << 7)
+#define DI_POL_DRDY_POLARITY_15			(1 << 4)
+
+#define DI_VSYNC_SEL_OFFSET			13
+
+static inline u32 ipu_di_read(struct ipu_di *di, unsigned offset)
+{
+	return readl(di->base + offset);
+}
+
+static inline void ipu_di_write(struct ipu_di *di, u32 value, unsigned offset)
+{
+	writel(value, di->base + offset);
+}
+
+static void ipu_di_data_wave_config(struct ipu_di *di,
+				     int wave_gen,
+				     int access_size, int component_size)
+{
+	u32 reg;
+	reg = (access_size << DI_DW_GEN_ACCESS_SIZE_OFFSET) |
+	    (component_size << DI_DW_GEN_COMPONENT_SIZE_OFFSET);
+	ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
+}
+
+static void ipu_di_data_pin_config(struct ipu_di *di, int wave_gen, int di_pin,
+		int set, int up, int down)
+{
+	u32 reg;
+
+	reg = ipu_di_read(di, DI_DW_GEN(wave_gen));
+	reg &= ~(0x3 << (di_pin * 2));
+	reg |= set << (di_pin * 2);
+	ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
+
+	ipu_di_write(di, (down << 16) | up, DI_DW_SET(wave_gen, set));
+}
+
+static void ipu_di_sync_config(struct ipu_di *di, struct di_sync_config *config,
+		int start, int count)
+{
+	u32 reg;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		struct di_sync_config *c = &config[i];
+		int wave_gen = start + i + 1;
+
+		if ((c->run_count >= 0x1000) || (c->offset_count >= 0x1000) ||
+				(c->repeat_count >= 0x1000) ||
+				(c->cnt_up >= 0x400) ||
+				(c->cnt_down >= 0x400)) {
+			dev_err(di->ipu->dev, "DI%d counters out of range.\n",
+					di->id);
+			return;
+		}
+
+		reg = DI_SW_GEN0_RUN_COUNT(c->run_count) |
+			DI_SW_GEN0_RUN_SRC(c->run_src) |
+			DI_SW_GEN0_OFFSET_COUNT(c->offset_count) |
+			DI_SW_GEN0_OFFSET_SRC(c->offset_src);
+		ipu_di_write(di, reg, DI_SW_GEN0(wave_gen));
+
+		reg = DI_SW_GEN1_CNT_POL_GEN_EN(c->cnt_polarity_gen_en) |
+			DI_SW_GEN1_CNT_CLR_SRC(c->cnt_clr_src) |
+			DI_SW_GEN1_CNT_POL_TRIGGER_SRC(
+					c->cnt_polarity_trigger_src) |
+			DI_SW_GEN1_CNT_POL_CLR_SRC(c->cnt_polarity_clr_src) |
+			DI_SW_GEN1_CNT_DOWN(c->cnt_down) |
+			DI_SW_GEN1_CNT_UP(c->cnt_up);
+
+		/* Enable auto reload */
+		if (c->repeat_count == 0)
+			reg |= DI_SW_GEN1_AUTO_RELOAD;
+
+		ipu_di_write(di, reg, DI_SW_GEN1(wave_gen));
+
+		reg = ipu_di_read(di, DI_STP_REP(wave_gen));
+		reg &= ~(0xffff << (16 * ((wave_gen - 1) & 0x1)));
+		reg |= c->repeat_count << (16 * ((wave_gen - 1) & 0x1));
+		ipu_di_write(di, reg, DI_STP_REP(wave_gen));
+	}
+}
+
+static void ipu_di_sync_config_interlaced(struct ipu_di *di,
+		struct ipu_di_signal_cfg *sig)
+{
+	u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
+		sig->mode.hback_porch + sig->mode.hfront_porch;
+	u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
+		sig->mode.vback_porch + sig->mode.vfront_porch;
+	u32 reg;
+	struct di_sync_config cfg[] = {
+		{
+			.run_count = h_total / 2 - 1,
+			.run_src = DI_SYNC_CLK,
+		}, {
+			.run_count = h_total - 11,
+			.run_src = DI_SYNC_CLK,
+			.cnt_down = 4,
+		}, {
+			.run_count = v_total * 2 - 1,
+			.run_src = DI_SYNC_INT_HSYNC,
+			.offset_count = 1,
+			.offset_src = DI_SYNC_INT_HSYNC,
+			.cnt_down = 4,
+		}, {
+			.run_count = v_total / 2 - 1,
+			.run_src = DI_SYNC_HSYNC,
+			.offset_count = sig->mode.vback_porch,
+			.offset_src = DI_SYNC_HSYNC,
+			.repeat_count = 2,
+			.cnt_clr_src = DI_SYNC_VSYNC,
+		}, {
+			.run_src = DI_SYNC_HSYNC,
+			.repeat_count = sig->mode.vactive / 2,
+			.cnt_clr_src = 4,
+		}, {
+			.run_count = v_total - 1,
+			.run_src = DI_SYNC_HSYNC,
+		}, {
+			.run_count = v_total / 2 - 1,
+			.run_src = DI_SYNC_HSYNC,
+			.offset_count = 9,
+			.offset_src = DI_SYNC_HSYNC,
+			.repeat_count = 2,
+			.cnt_clr_src = DI_SYNC_VSYNC,
+		}, {
+			.run_src = DI_SYNC_CLK,
+			.offset_count = sig->mode.hback_porch,
+			.offset_src = DI_SYNC_CLK,
+			.repeat_count = sig->mode.hactive,
+			.cnt_clr_src = 5,
+		}, {
+			.run_count = v_total - 1,
+			.run_src = DI_SYNC_INT_HSYNC,
+			.offset_count = v_total / 2,
+			.offset_src = DI_SYNC_INT_HSYNC,
+			.cnt_clr_src = DI_SYNC_HSYNC,
+			.cnt_down = 4,
+		}
+	};
+
+	ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
+
+	/* set gentime select and tag sel */
+	reg = ipu_di_read(di, DI_SW_GEN1(9));
+	reg &= 0x1FFFFFFF;
+	reg |= (3 - 1) << 29 | 0x00008000;
+	ipu_di_write(di, reg, DI_SW_GEN1(9));
+
+	ipu_di_write(di, v_total / 2 - 1, DI_SCR_CONF);
+}
+
+static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
+		struct ipu_di_signal_cfg *sig, int div)
+{
+	u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
+		sig->mode.hback_porch + sig->mode.hfront_porch;
+	u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
+		sig->mode.vback_porch + sig->mode.vfront_porch;
+	struct di_sync_config cfg[] = {
+		{
+			/* 1: INT_HSYNC */
+			.run_count = h_total - 1,
+			.run_src = DI_SYNC_CLK,
+		} , {
+			/* PIN2: HSYNC */
+			.run_count = h_total - 1,
+			.run_src = DI_SYNC_CLK,
+			.offset_count = div * sig->v_to_h_sync,
+			.offset_src = DI_SYNC_CLK,
+			.cnt_polarity_gen_en = 1,
+			.cnt_polarity_trigger_src = DI_SYNC_CLK,
+			.cnt_down = sig->mode.hsync_len * 2,
+		} , {
+			/* PIN3: VSYNC */
+			.run_count = v_total - 1,
+			.run_src = DI_SYNC_INT_HSYNC,
+			.cnt_polarity_gen_en = 1,
+			.cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
+			.cnt_down = sig->mode.vsync_len * 2,
+		} , {
+			/* 4: Line Active */
+			.run_src = DI_SYNC_HSYNC,
+			.offset_count = sig->mode.vsync_len +
+					sig->mode.vback_porch,
+			.offset_src = DI_SYNC_HSYNC,
+			.repeat_count = sig->mode.vactive,
+			.cnt_clr_src = DI_SYNC_VSYNC,
+		} , {
+			/* 5: Pixel Active, referenced by DC */
+			.run_src = DI_SYNC_CLK,
+			.offset_count = sig->mode.hsync_len +
+					sig->mode.hback_porch,
+			.offset_src = DI_SYNC_CLK,
+			.repeat_count = sig->mode.hactive,
+			.cnt_clr_src = 5, /* Line Active */
+		} , {
+			/* unused */
+		} , {
+			/* unused */
+		} , {
+			/* unused */
+		} , {
+			/* unused */
+		},
+	};
+	/* can't use #7 and #8 for line active and pixel active counters */
+	struct di_sync_config cfg_vga[] = {
+		{
+			/* 1: INT_HSYNC */
+			.run_count = h_total - 1,
+			.run_src = DI_SYNC_CLK,
+		} , {
+			/* 2: VSYNC */
+			.run_count = v_total - 1,
+			.run_src = DI_SYNC_INT_HSYNC,
+		} , {
+			/* 3: Line Active */
+			.run_src = DI_SYNC_INT_HSYNC,
+			.offset_count = sig->mode.vsync_len +
+					sig->mode.vback_porch,
+			.offset_src = DI_SYNC_INT_HSYNC,
+			.repeat_count = sig->mode.vactive,
+			.cnt_clr_src = 3 /* VSYNC */,
+		} , {
+			/* PIN4: HSYNC for VGA via TVEv2 on TQ MBa53 */
+			.run_count = h_total - 1,
+			.run_src = DI_SYNC_CLK,
+			.offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
+			.offset_src = DI_SYNC_CLK,
+			.cnt_polarity_gen_en = 1,
+			.cnt_polarity_trigger_src = DI_SYNC_CLK,
+			.cnt_down = sig->mode.hsync_len * 2,
+		} , {
+			/* 5: Pixel Active signal to DC */
+			.run_src = DI_SYNC_CLK,
+			.offset_count = sig->mode.hsync_len +
+					sig->mode.hback_porch,
+			.offset_src = DI_SYNC_CLK,
+			.repeat_count = sig->mode.hactive,
+			.cnt_clr_src = 4, /* Line Active */
+		} , {
+			/* PIN6: VSYNC for VGA via TVEv2 on TQ MBa53 */
+			.run_count = v_total - 1,
+			.run_src = DI_SYNC_INT_HSYNC,
+			.offset_count = 1, /* magic value from Freescale TVE driver */
+			.offset_src = DI_SYNC_INT_HSYNC,
+			.cnt_polarity_gen_en = 1,
+			.cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
+			.cnt_down = sig->mode.vsync_len * 2,
+		} , {
+			/* PIN4: HSYNC for VGA via TVEv2 on i.MX53-QSB */
+			.run_count = h_total - 1,
+			.run_src = DI_SYNC_CLK,
+			.offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
+			.offset_src = DI_SYNC_CLK,
+			.cnt_polarity_gen_en = 1,
+			.cnt_polarity_trigger_src = DI_SYNC_CLK,
+			.cnt_down = sig->mode.hsync_len * 2,
+		} , {
+			/* PIN6: VSYNC for VGA via TVEv2 on i.MX53-QSB */
+			.run_count = v_total - 1,
+			.run_src = DI_SYNC_INT_HSYNC,
+			.offset_count = 1, /* magic value from Freescale TVE driver */
+			.offset_src = DI_SYNC_INT_HSYNC,
+			.cnt_polarity_gen_en = 1,
+			.cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
+			.cnt_down = sig->mode.vsync_len * 2,
+		} , {
+			/* unused */
+		},
+	};
+
+	ipu_di_write(di, v_total - 1, DI_SCR_CONF);
+	if (sig->hsync_pin == 2 && sig->vsync_pin == 3)
+		ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
+	else
+		ipu_di_sync_config(di, cfg_vga, 0, ARRAY_SIZE(cfg_vga));
+}
+
+static void ipu_di_config_clock(struct ipu_di *di,
+	const struct ipu_di_signal_cfg *sig)
+{
+	struct clk *clk;
+	unsigned clkgen0;
+	uint32_t val;
+
+	if (sig->clkflags & IPU_DI_CLKMODE_EXT) {
+		/*
+		 * CLKMODE_EXT means we must use the DI clock: this is
+		 * needed for things like LVDS which needs to feed the
+		 * DI and LDB with the same pixel clock.
+		 */
+		clk = di->clk_di;
+
+		if (sig->clkflags & IPU_DI_CLKMODE_SYNC) {
+			/*
+			 * CLKMODE_SYNC means that we want the DI to be
+			 * clocked at the same rate as the parent clock.
+			 * This is needed (eg) for LDB which needs to be
+			 * fed with the same pixel clock.  We assume that
+			 * the LDB clock has already been set correctly.
+			 */
+			clkgen0 = 1 << 4;
+		} else {
+			/*
+			 * We can use the divider.  We should really have
+			 * a flag here indicating whether the bridge can
+			 * cope with a fractional divider or not.  For the
+			 * time being, let's go for simplicitly and
+			 * reliability.
+			 */
+			unsigned long in_rate;
+			unsigned div;
+
+			clk_set_rate(clk, sig->mode.pixelclock);
+
+			in_rate = clk_get_rate(clk);
+			div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
+			div = clamp(div, 1U, 255U);
+
+			clkgen0 = div << 4;
+		}
+	} else {
+		/*
+		 * For other interfaces, we can arbitarily select between
+		 * the DI specific clock and the internal IPU clock.  See
+		 * DI_GENERAL bit 20.  We select the IPU clock if it can
+		 * give us a clock rate within 1% of the requested frequency,
+		 * otherwise we use the DI clock.
+		 */
+		unsigned long rate, clkrate;
+		unsigned div, error;
+
+		clkrate = clk_get_rate(di->clk_ipu);
+		div = DIV_ROUND_CLOSEST(clkrate, sig->mode.pixelclock);
+		div = clamp(div, 1U, 255U);
+		rate = clkrate / div;
+
+		error = rate / (sig->mode.pixelclock / 1000);
+
+		dev_dbg(di->ipu->dev, "  IPU clock can give %lu with divider %u, error %d.%u%%\n",
+			rate, div, (signed)(error - 1000) / 10, error % 10);
+
+		/* Allow a 1% error */
+		if (error < 1010 && error >= 990) {
+			clk = di->clk_ipu;
+
+			clkgen0 = div << 4;
+		} else {
+			unsigned long in_rate;
+			unsigned div;
+
+			clk = di->clk_di;
+
+			clk_set_rate(clk, sig->mode.pixelclock);
+
+			in_rate = clk_get_rate(clk);
+			div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
+			div = clamp(div, 1U, 255U);
+
+			clkgen0 = div << 4;
+		}
+	}
+
+	di->clk_di_pixel = clk;
+
+	/* Set the divider */
+	ipu_di_write(di, clkgen0, DI_BS_CLKGEN0);
+
+	/*
+	 * Set the high/low periods.  Bits 24:16 give us the falling edge,
+	 * and bits 8:0 give the rising edge.  LSB is fraction, and is
+	 * based on the divider above.  We want a 50% duty cycle, so set
+	 * the falling edge to be half the divider.
+	 */
+	ipu_di_write(di, (clkgen0 >> 4) << 16, DI_BS_CLKGEN1);
+
+	/* Finally select the input clock */
+	val = ipu_di_read(di, DI_GENERAL) & ~DI_GEN_DI_CLK_EXT;
+	if (clk == di->clk_di)
+		val |= DI_GEN_DI_CLK_EXT;
+	ipu_di_write(di, val, DI_GENERAL);
+
+	dev_dbg(di->ipu->dev, "Want %luHz IPU %luHz DI %luHz using %s, %luHz\n",
+		sig->mode.pixelclock,
+		clk_get_rate(di->clk_ipu),
+		clk_get_rate(di->clk_di),
+		clk == di->clk_di ? "DI" : "IPU",
+		clk_get_rate(di->clk_di_pixel) / (clkgen0 >> 4));
+}
+
+/*
+ * This function is called to adjust a video mode to IPU restrictions.
+ * It is meant to be called from drm crtc mode_fixup() methods.
+ */
+int ipu_di_adjust_videomode(struct ipu_di *di, struct videomode *mode)
+{
+	u32 diff;
+
+	if (mode->vfront_porch >= 2)
+		return 0;
+
+	diff = 2 - mode->vfront_porch;
+
+	if (mode->vback_porch >= diff) {
+		mode->vfront_porch = 2;
+		mode->vback_porch -= diff;
+	} else if (mode->vsync_len > diff) {
+		mode->vfront_porch = 2;
+		mode->vsync_len = mode->vsync_len - diff;
+	} else {
+		dev_warn(di->ipu->dev, "failed to adjust videomode\n");
+		return -EINVAL;
+	}
+
+	dev_warn(di->ipu->dev, "videomode adapted for IPU restrictions\n");
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_di_adjust_videomode);
+
+int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
+{
+	u32 reg;
+	u32 di_gen, vsync_cnt;
+	u32 div;
+
+	dev_dbg(di->ipu->dev, "disp %d: panel size = %d x %d\n",
+		di->id, sig->mode.hactive, sig->mode.vactive);
+
+	if ((sig->mode.vsync_len == 0) || (sig->mode.hsync_len == 0))
+		return -EINVAL;
+
+	dev_dbg(di->ipu->dev, "Clocks: IPU %luHz DI %luHz Needed %luHz\n",
+		clk_get_rate(di->clk_ipu),
+		clk_get_rate(di->clk_di),
+		sig->mode.pixelclock);
+
+	mutex_lock(&di_mutex);
+
+	ipu_di_config_clock(di, sig);
+
+	div = ipu_di_read(di, DI_BS_CLKGEN0) & 0xfff;
+	div = div / 16;		/* Now divider is integer portion */
+
+	/* Setup pixel clock timing */
+	/* Down time is half of period */
+	ipu_di_write(di, (div << 16), DI_BS_CLKGEN1);
+
+	ipu_di_data_wave_config(di, SYNC_WAVE, div - 1, div - 1);
+	ipu_di_data_pin_config(di, SYNC_WAVE, DI_PIN15, 3, 0, div * 2);
+
+	di_gen = ipu_di_read(di, DI_GENERAL) & DI_GEN_DI_CLK_EXT;
+	di_gen |= DI_GEN_DI_VSYNC_EXT;
+
+	if (sig->mode.flags & DISPLAY_FLAGS_INTERLACED) {
+		ipu_di_sync_config_interlaced(di, sig);
+
+		/* set y_sel = 1 */
+		di_gen |= 0x10000000;
+		di_gen |= DI_GEN_POLARITY_5;
+		di_gen |= DI_GEN_POLARITY_8;
+
+		vsync_cnt = 7;
+
+		if (sig->mode.flags & DISPLAY_FLAGS_HSYNC_HIGH)
+			di_gen |= DI_GEN_POLARITY_3;
+		if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH)
+			di_gen |= DI_GEN_POLARITY_2;
+	} else {
+		ipu_di_sync_config_noninterlaced(di, sig, div);
+
+		vsync_cnt = 3;
+		if (di->id == 1)
+			/*
+			 * TODO: change only for TVEv2, parallel display
+			 * uses pin 2 / 3
+			 */
+			if (!(sig->hsync_pin == 2 && sig->vsync_pin == 3))
+				vsync_cnt = 6;
+
+		if (sig->mode.flags & DISPLAY_FLAGS_HSYNC_HIGH) {
+			if (sig->hsync_pin == 2)
+				di_gen |= DI_GEN_POLARITY_2;
+			else if (sig->hsync_pin == 4)
+				di_gen |= DI_GEN_POLARITY_4;
+			else if (sig->hsync_pin == 7)
+				di_gen |= DI_GEN_POLARITY_7;
+		}
+		if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH) {
+			if (sig->vsync_pin == 3)
+				di_gen |= DI_GEN_POLARITY_3;
+			else if (sig->vsync_pin == 6)
+				di_gen |= DI_GEN_POLARITY_6;
+			else if (sig->vsync_pin == 8)
+				di_gen |= DI_GEN_POLARITY_8;
+		}
+	}
+
+	if (sig->clk_pol)
+		di_gen |= DI_GEN_POLARITY_DISP_CLK;
+
+	ipu_di_write(di, di_gen, DI_GENERAL);
+
+	ipu_di_write(di, (--vsync_cnt << DI_VSYNC_SEL_OFFSET) | 0x00000002,
+		     DI_SYNC_AS_GEN);
+
+	reg = ipu_di_read(di, DI_POL);
+	reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
+
+	if (sig->enable_pol)
+		reg |= DI_POL_DRDY_POLARITY_15;
+	if (sig->data_pol)
+		reg |= DI_POL_DRDY_DATA_POLARITY;
+
+	ipu_di_write(di, reg, DI_POL);
+
+	mutex_unlock(&di_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_di_init_sync_panel);
+
+int ipu_di_enable(struct ipu_di *di)
+{
+	int ret;
+
+	WARN_ON(IS_ERR(di->clk_di_pixel));
+
+	ret = clk_prepare_enable(di->clk_di_pixel);
+	if (ret)
+		return ret;
+
+	ipu_module_enable(di->ipu, di->module);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_di_enable);
+
+int ipu_di_disable(struct ipu_di *di)
+{
+	WARN_ON(IS_ERR(di->clk_di_pixel));
+
+	ipu_module_disable(di->ipu, di->module);
+
+	clk_disable_unprepare(di->clk_di_pixel);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_di_disable);
+
+int ipu_di_get_num(struct ipu_di *di)
+{
+	return di->id;
+}
+EXPORT_SYMBOL_GPL(ipu_di_get_num);
+
+static DEFINE_MUTEX(ipu_di_lock);
+
+struct ipu_di *ipu_di_get(struct ipu_soc *ipu, int disp)
+{
+	struct ipu_di *di;
+
+	if (disp > 1)
+		return ERR_PTR(-EINVAL);
+
+	di = ipu->di_priv[disp];
+
+	mutex_lock(&ipu_di_lock);
+
+	if (di->inuse) {
+		di = ERR_PTR(-EBUSY);
+		goto out;
+	}
+
+	di->inuse = true;
+out:
+	mutex_unlock(&ipu_di_lock);
+
+	return di;
+}
+EXPORT_SYMBOL_GPL(ipu_di_get);
+
+void ipu_di_put(struct ipu_di *di)
+{
+	mutex_lock(&ipu_di_lock);
+
+	di->inuse = false;
+
+	mutex_unlock(&ipu_di_lock);
+}
+EXPORT_SYMBOL_GPL(ipu_di_put);
+
+int ipu_di_init(struct ipu_soc *ipu, struct device *dev, int id,
+		unsigned long base,
+		u32 module, struct clk *clk_ipu)
+{
+	struct ipu_di *di;
+
+	if (id > 1)
+		return -ENODEV;
+
+	di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
+	if (!di)
+		return -ENOMEM;
+
+	ipu->di_priv[id] = di;
+
+	di->clk_di = devm_clk_get(dev, id ? "di1" : "di0");
+	if (IS_ERR(di->clk_di))
+		return PTR_ERR(di->clk_di);
+
+	di->module = module;
+	di->id = id;
+	di->clk_ipu = clk_ipu;
+	di->base = devm_ioremap(dev, base, PAGE_SIZE);
+	if (!di->base)
+		return -ENOMEM;
+
+	ipu_di_write(di, 0x10, DI_BS_CLKGEN0);
+
+	dev_dbg(dev, "DI%d base: 0x%08lx remapped to %p\n",
+			id, base, di->base);
+	di->inuse = false;
+	di->ipu = ipu;
+
+	return 0;
+}
+
+void ipu_di_exit(struct ipu_soc *ipu, int id)
+{
+}
-- 
cgit 1.2.3-korg