drivers/video/sunxi/lcdc.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Timing controller driver for Allwinner SoCs.
  *
  * (C) Copyright 2013-2014 Luc Verhaegen <libv@skynet.be>
  * (C) Copyright 2014-2015 Hans de Goede <hdegoede@redhat.com>
  * (C) Copyright 2017 Jernej Skrabec <jernej.skrabec@siol.net>
  */

 #include <common.h>

 #include <asm/arch/clock.h>
 #include <asm/arch/lcdc.h>
 #include <asm/io.h>

 static int lcdc_get_clk_delay(const struct display_timing *mode, int tcon)
 {
 	int delay;

 	delay = mode->vfront_porch.typ + mode->vsync_len.typ +
 		mode->vback_porch.typ;
 	if (mode->flags & DISPLAY_FLAGS_INTERLACED)
 		delay /= 2;
 	if (tcon == 1)
 		delay -= 2;

 	return (delay > 30) ? 30 : delay;
 }

 void lcdc_init(struct sunxi_lcdc_reg * const lcdc)
 {
 	/* Init lcdc */
 	writel(0, &lcdc->ctrl); /* Disable tcon */
 	writel(0, &lcdc->int0); /* Disable all interrupts */

 	/* Disable tcon0 dot clock */
 	clrbits_le32(&lcdc->tcon0_dclk, SUNXI_LCDC_TCON0_DCLK_ENABLE);

 	/* Set all io lines to tristate */
 	writel(0xffffffff, &lcdc->tcon0_io_tristate);
 	writel(0xffffffff, &lcdc->tcon1_io_tristate);
 }

 void lcdc_enable(struct sunxi_lcdc_reg * const lcdc, int depth)
 {
 	setbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_TCON_ENABLE);
 #ifdef CONFIG_VIDEO_LCD_IF_LVDS
 	setbits_le32(&lcdc->tcon0_lvds_intf, SUNXI_LCDC_TCON0_LVDS_INTF_ENABLE);
 	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0);
 #ifdef CONFIG_SUNXI_GEN_SUN6I
 	udelay(2); /* delay at least 1200 ns */
 	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_EN_MB);
 	udelay(2); /* delay at least 1200 ns */
 	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_DRVC);
 	if (depth == 18)
 		setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_DRVD(0x7));
 	else
 		setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_DRVD(0xf));
 #else
 	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_UPDATE);
 	udelay(2); /* delay at least 1200 ns */
 	setbits_le32(&lcdc->lvds_ana1, SUNXI_LCDC_LVDS_ANA1_INIT1);
 	udelay(1); /* delay at least 120 ns */
 	setbits_le32(&lcdc->lvds_ana1, SUNXI_LCDC_LVDS_ANA1_INIT2);
 	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_UPDATE);
 #endif
 #endif
 }

 void lcdc_tcon0_mode_set(struct sunxi_lcdc_reg * const lcdc,
 			 const struct display_timing *mode,
 			 int clk_div, bool for_ext_vga_dac,
 			 int depth, int dclk_phase)
 {
 	int bp, clk_delay, total, val;

 #ifndef CONFIG_SUNXI_DE2
 	/* Use tcon0 */
 	clrsetbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_IO_MAP_MASK,
 			SUNXI_LCDC_CTRL_IO_MAP_TCON0);
 #endif

 	clk_delay = lcdc_get_clk_delay(mode, 0);
 	writel(SUNXI_LCDC_TCON0_CTRL_ENABLE |
 	       SUNXI_LCDC_TCON0_CTRL_CLK_DELAY(clk_delay), &lcdc->tcon0_ctrl);

 	writel(SUNXI_LCDC_TCON0_DCLK_ENABLE |
 	       SUNXI_LCDC_TCON0_DCLK_DIV(clk_div), &lcdc->tcon0_dclk);

 	writel(SUNXI_LCDC_X(mode->hactive.typ) |
 	       SUNXI_LCDC_Y(mode->vactive.typ), &lcdc->tcon0_timing_active);

 	bp = mode->hsync_len.typ + mode->hback_porch.typ;
 	total = mode->hactive.typ + mode->hfront_porch.typ + bp;
 	writel(SUNXI_LCDC_TCON0_TIMING_H_TOTAL(total) |
 	       SUNXI_LCDC_TCON0_TIMING_H_BP(bp), &lcdc->tcon0_timing_h);

 	bp = mode->vsync_len.typ + mode->vback_porch.typ;
 	total = mode->vactive.typ + mode->vfront_porch.typ + bp;
 	writel(SUNXI_LCDC_TCON0_TIMING_V_TOTAL(total) |
 	       SUNXI_LCDC_TCON0_TIMING_V_BP(bp), &lcdc->tcon0_timing_v);

 #if defined(CONFIG_VIDEO_LCD_IF_PARALLEL) || defined(CONFIG_VIDEO_DE2)
 	writel(SUNXI_LCDC_X(mode->hsync_len.typ) |
 	       SUNXI_LCDC_Y(mode->vsync_len.typ), &lcdc->tcon0_timing_sync);

 	writel(0, &lcdc->tcon0_hv_intf);
 	writel(0, &lcdc->tcon0_cpu_intf);
 #endif
 #ifdef CONFIG_VIDEO_LCD_IF_LVDS
 	val = (depth == 18) ? 1 : 0;
 	writel(SUNXI_LCDC_TCON0_LVDS_INTF_BITWIDTH(val) |
 	       SUNXI_LCDC_TCON0_LVDS_CLK_SEL_TCON0, &lcdc->tcon0_lvds_intf);
 #endif

 	if (depth == 18 || depth == 16) {
 		writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[0]);
 		writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[1]);
 		writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[2]);
 		writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[3]);
 		writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[4]);
 		writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[5]);
 		writel(SUNXI_LCDC_TCON0_FRM_TAB0, &lcdc->tcon0_frm_table[0]);
 		writel(SUNXI_LCDC_TCON0_FRM_TAB1, &lcdc->tcon0_frm_table[1]);
 		writel(SUNXI_LCDC_TCON0_FRM_TAB2, &lcdc->tcon0_frm_table[2]);
 		writel(SUNXI_LCDC_TCON0_FRM_TAB3, &lcdc->tcon0_frm_table[3]);
 		writel(((depth == 18) ?
 			SUNXI_LCDC_TCON0_FRM_CTRL_RGB666 :
 			SUNXI_LCDC_TCON0_FRM_CTRL_RGB565),
 		       &lcdc->tcon0_frm_ctrl);
 	}

 	val = SUNXI_LCDC_TCON0_IO_POL_DCLK_PHASE(dclk_phase);
 	if (mode->flags & DISPLAY_FLAGS_HSYNC_LOW)
 		val |= SUNXI_LCDC_TCON_HSYNC_MASK;
 	if (mode->flags & DISPLAY_FLAGS_VSYNC_LOW)
 		val |= SUNXI_LCDC_TCON_VSYNC_MASK;

 #ifdef CONFIG_VIDEO_VGA_VIA_LCD_FORCE_SYNC_ACTIVE_HIGH
 	if (for_ext_vga_dac)
 		val = 0;
 #endif
 	writel(val, &lcdc->tcon0_io_polarity);

 	writel(0, &lcdc->tcon0_io_tristate);
 }

 void lcdc_tcon1_mode_set(struct sunxi_lcdc_reg * const lcdc,
 			 const struct display_timing *mode,
 			 bool ext_hvsync, bool is_composite)
 {
 	int bp, clk_delay, total, val, yres;

 #ifndef CONFIG_SUNXI_DE2
 	/* Use tcon1 */
 	clrsetbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_IO_MAP_MASK,
 			SUNXI_LCDC_CTRL_IO_MAP_TCON1);
 #endif

 	clk_delay = lcdc_get_clk_delay(mode, 1);
 	writel(SUNXI_LCDC_TCON1_CTRL_ENABLE |
 	       ((mode->flags & DISPLAY_FLAGS_INTERLACED) ?
 			SUNXI_LCDC_TCON1_CTRL_INTERLACE_ENABLE : 0) |
 	       SUNXI_LCDC_TCON1_CTRL_CLK_DELAY(clk_delay), &lcdc->tcon1_ctrl);

 	yres = mode->vactive.typ;
 	if (mode->flags & DISPLAY_FLAGS_INTERLACED)
 		yres /= 2;
 	writel(SUNXI_LCDC_X(mode->hactive.typ) | SUNXI_LCDC_Y(yres),
 	       &lcdc->tcon1_timing_source);
 	writel(SUNXI_LCDC_X(mode->hactive.typ) | SUNXI_LCDC_Y(yres),
 	       &lcdc->tcon1_timing_scale);
 	writel(SUNXI_LCDC_X(mode->hactive.typ) | SUNXI_LCDC_Y(yres),
 	       &lcdc->tcon1_timing_out);

 	bp = mode->hsync_len.typ + mode->hback_porch.typ;
 	total = mode->hactive.typ + mode->hfront_porch.typ + bp;
 	writel(SUNXI_LCDC_TCON1_TIMING_H_TOTAL(total) |
 	       SUNXI_LCDC_TCON1_TIMING_H_BP(bp), &lcdc->tcon1_timing_h);

 	bp = mode->vsync_len.typ + mode->vback_porch.typ;
 	total = mode->vactive.typ + mode->vfront_porch.typ + bp;
 	if (!(mode->flags & DISPLAY_FLAGS_INTERLACED))
 		total *= 2;
 	writel(SUNXI_LCDC_TCON1_TIMING_V_TOTAL(total) |
 	       SUNXI_LCDC_TCON1_TIMING_V_BP(bp), &lcdc->tcon1_timing_v);

 	writel(SUNXI_LCDC_X(mode->hsync_len.typ) |
 	       SUNXI_LCDC_Y(mode->vsync_len.typ), &lcdc->tcon1_timing_sync);

 	if (ext_hvsync) {
 		val = 0;
 		if (mode->flags & DISPLAY_FLAGS_HSYNC_HIGH)
 			val |= SUNXI_LCDC_TCON_HSYNC_MASK;
 		if (mode->flags & DISPLAY_FLAGS_VSYNC_HIGH)
 			val |= SUNXI_LCDC_TCON_VSYNC_MASK;
 		writel(val, &lcdc->tcon1_io_polarity);

 		clrbits_le32(&lcdc->tcon1_io_tristate,
 			     SUNXI_LCDC_TCON_VSYNC_MASK |
 			     SUNXI_LCDC_TCON_HSYNC_MASK);
 	}

 #ifdef CONFIG_MACH_SUN5I
 	if (is_composite)
 		clrsetbits_le32(&lcdc->mux_ctrl, SUNXI_LCDC_MUX_CTRL_SRC0_MASK,
 				SUNXI_LCDC_MUX_CTRL_SRC0(1));
 #endif
 }

 void lcdc_pll_set(struct sunxi_ccm_reg *ccm, int tcon, int dotclock,
 		  int *clk_div, int *clk_double, bool is_composite)
 {
 	int value, n, m, min_m, max_m, diff;
 	int best_n = 0, best_m = 0, best_diff = 0x0FFFFFFF;
 	int best_double = 0;
 	bool use_mipi_pll = false;

 	if (tcon == 0) {
 #if defined(CONFIG_VIDEO_LCD_IF_PARALLEL) || defined(CONFIG_SUNXI_DE2)
 		min_m = 6;
 		max_m = 127;
 #endif
 #ifdef CONFIG_VIDEO_LCD_IF_LVDS
 		min_m = 7;
 		max_m = 7;
 #endif
 	} else {
 		min_m = 1;
 		max_m = 15;
 	}

 	/*
 	 * Find the lowest divider resulting in a matching clock, if there
 	 * is no match, pick the closest lower clock, as monitors tend to
 	 * not sync to higher frequencies.
 	 */
 	for (m = min_m; m <= max_m; m++) {
 #ifndef CONFIG_SUNXI_DE2
 		n = (m * dotclock) / 3000;

 		if ((n >= 9) && (n <= 127)) {
 			value = (3000 * n) / m;
 			diff = dotclock - value;
 			if (diff < best_diff) {
 				best_diff = diff;
 				best_m = m;
 				best_n = n;
 				best_double = 0;
 			}
 		}

 		/* These are just duplicates */
 		if (!(m & 1))
 			continue;
 #endif

 		/* No double clock on DE2 */
 		n = (m * dotclock) / 6000;
 		if ((n >= 9) && (n <= 127)) {
 			value = (6000 * n) / m;
 			diff = dotclock - value;
 			if (diff < best_diff) {
 				best_diff = diff;
 				best_m = m;
 				best_n = n;
 				best_double = 1;
 			}
 		}
 	}

 #ifdef CONFIG_MACH_SUN6I
 	/*
 	 * Use the MIPI pll if we've been unable to find any matching setting
 	 * for PLL3, this happens with high dotclocks because of min_m = 6.
 	 */
 	if (tcon == 0 && best_n == 0) {
 		use_mipi_pll = true;
 		best_m = 6;  /* Minimum m for tcon0 */
 	}

 	if (use_mipi_pll) {
 		clock_set_pll3(297000000); /* Fix the video pll at 297 MHz */
 		clock_set_mipi_pll(best_m * dotclock * 1000);
 		debug("dotclock: %dkHz = %dkHz via mipi pll\n",
 		      dotclock, clock_get_mipi_pll() / best_m / 1000);
 	} else
 #endif
 	{
 		clock_set_pll3(best_n * 3000000);
 		debug("dotclock: %dkHz = %dkHz: (%d * 3MHz * %d) / %d\n",
 		      dotclock,
 		      (best_double + 1) * clock_get_pll3() / best_m / 1000,
 		      best_double + 1, best_n, best_m);
 	}

 	if (tcon == 0) {
 		u32 pll;

 		if (use_mipi_pll)
 			pll = CCM_LCD_CH0_CTRL_MIPI_PLL;
 		else if (best_double)
 			pll = CCM_LCD_CH0_CTRL_PLL3_2X;
 		else
 			pll = CCM_LCD_CH0_CTRL_PLL3;
 #ifndef CONFIG_SUNXI_DE2
 		writel(CCM_LCD_CH0_CTRL_GATE | CCM_LCD_CH0_CTRL_RST | pll,
 		       &ccm->lcd0_ch0_clk_cfg);
 #else
 		writel(CCM_LCD_CH0_CTRL_GATE | CCM_LCD_CH0_CTRL_RST | pll,
 		       &ccm->lcd0_clk_cfg);
 #endif
 	}
 #ifndef CONFIG_SUNXI_DE2
 	else {
 		writel(CCM_LCD_CH1_CTRL_GATE |
 		       (best_double ? CCM_LCD_CH1_CTRL_PLL3_2X :
 				      CCM_LCD_CH1_CTRL_PLL3) |
 		       CCM_LCD_CH1_CTRL_M(best_m), &ccm->lcd0_ch1_clk_cfg);
 		if (is_composite)
 			setbits_le32(&ccm->lcd0_ch1_clk_cfg,
 				     CCM_LCD_CH1_CTRL_HALF_SCLK1);
 	}
 #endif

 	*clk_div = best_m;
 	*clk_double = best_double;
 }
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Timing controller driver for Allwinner SoCs.
	*
	* (C) Copyright 2013-2014 Luc Verhaegen <libv@skynet.be>
	* (C) Copyright 2014-2015 Hans de Goede <hdegoede@redhat.com>
	* (C) Copyright 2017 Jernej Skrabec <jernej.skrabec@siol.net>
	*/

	#include <common.h>

	#include <asm/arch/clock.h>
	#include <asm/arch/lcdc.h>
	#include <asm/io.h>

	static int lcdc_get_clk_delay(const struct display_timing *mode, int tcon)
	{
	int delay;

	delay = mode->vfront_porch.typ + mode->vsync_len.typ +
	mode->vback_porch.typ;
	if (mode->flags & DISPLAY_FLAGS_INTERLACED)
	delay /= 2;
	if (tcon == 1)
	delay -= 2;

	return (delay > 30) ? 30 : delay;
	}

	void lcdc_init(struct sunxi_lcdc_reg * const lcdc)
	{
	/* Init lcdc */
	writel(0, &lcdc->ctrl); /* Disable tcon */
	writel(0, &lcdc->int0); /* Disable all interrupts */

	/* Disable tcon0 dot clock */
	clrbits_le32(&lcdc->tcon0_dclk, SUNXI_LCDC_TCON0_DCLK_ENABLE);

	/* Set all io lines to tristate */
	writel(0xffffffff, &lcdc->tcon0_io_tristate);
	writel(0xffffffff, &lcdc->tcon1_io_tristate);
	}

	void lcdc_enable(struct sunxi_lcdc_reg * const lcdc, int depth)
	{
	setbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_TCON_ENABLE);
	#ifdef CONFIG_VIDEO_LCD_IF_LVDS
	setbits_le32(&lcdc->tcon0_lvds_intf, SUNXI_LCDC_TCON0_LVDS_INTF_ENABLE);
	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0);
	#ifdef CONFIG_SUNXI_GEN_SUN6I
	udelay(2); /* delay at least 1200 ns */
	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_EN_MB);
	udelay(2); /* delay at least 1200 ns */
	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_DRVC);
	if (depth == 18)
	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_DRVD(0x7));
	else
	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_DRVD(0xf));
	#else
	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_UPDATE);
	udelay(2); /* delay at least 1200 ns */
	setbits_le32(&lcdc->lvds_ana1, SUNXI_LCDC_LVDS_ANA1_INIT1);
	udelay(1); /* delay at least 120 ns */
	setbits_le32(&lcdc->lvds_ana1, SUNXI_LCDC_LVDS_ANA1_INIT2);
	setbits_le32(&lcdc->lvds_ana0, SUNXI_LCDC_LVDS_ANA0_UPDATE);
	#endif
	#endif
	}

	void lcdc_tcon0_mode_set(struct sunxi_lcdc_reg * const lcdc,
	const struct display_timing *mode,
	int clk_div, bool for_ext_vga_dac,
	int depth, int dclk_phase)
	{
	int bp, clk_delay, total, val;

	#ifndef CONFIG_SUNXI_DE2
	/* Use tcon0 */
	clrsetbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_IO_MAP_MASK,
	SUNXI_LCDC_CTRL_IO_MAP_TCON0);
	#endif

	clk_delay = lcdc_get_clk_delay(mode, 0);
	writel(SUNXI_LCDC_TCON0_CTRL_ENABLE \|
	SUNXI_LCDC_TCON0_CTRL_CLK_DELAY(clk_delay), &lcdc->tcon0_ctrl);

	writel(SUNXI_LCDC_TCON0_DCLK_ENABLE \|
	SUNXI_LCDC_TCON0_DCLK_DIV(clk_div), &lcdc->tcon0_dclk);

	writel(SUNXI_LCDC_X(mode->hactive.typ) \|
	SUNXI_LCDC_Y(mode->vactive.typ), &lcdc->tcon0_timing_active);

	bp = mode->hsync_len.typ + mode->hback_porch.typ;
	total = mode->hactive.typ + mode->hfront_porch.typ + bp;
	writel(SUNXI_LCDC_TCON0_TIMING_H_TOTAL(total) \|
	SUNXI_LCDC_TCON0_TIMING_H_BP(bp), &lcdc->tcon0_timing_h);

	bp = mode->vsync_len.typ + mode->vback_porch.typ;
	total = mode->vactive.typ + mode->vfront_porch.typ + bp;
	writel(SUNXI_LCDC_TCON0_TIMING_V_TOTAL(total) \|
	SUNXI_LCDC_TCON0_TIMING_V_BP(bp), &lcdc->tcon0_timing_v);

	#if defined(CONFIG_VIDEO_LCD_IF_PARALLEL) \|\| defined(CONFIG_VIDEO_DE2)
	writel(SUNXI_LCDC_X(mode->hsync_len.typ) \|
	SUNXI_LCDC_Y(mode->vsync_len.typ), &lcdc->tcon0_timing_sync);

	writel(0, &lcdc->tcon0_hv_intf);
	writel(0, &lcdc->tcon0_cpu_intf);
	#endif
	#ifdef CONFIG_VIDEO_LCD_IF_LVDS
	val = (depth == 18) ? 1 : 0;
	writel(SUNXI_LCDC_TCON0_LVDS_INTF_BITWIDTH(val) \|
	SUNXI_LCDC_TCON0_LVDS_CLK_SEL_TCON0, &lcdc->tcon0_lvds_intf);
	#endif

	if (depth == 18 \|\| depth == 16) {
	writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[0]);
	writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[1]);
	writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[2]);
	writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[3]);
	writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[4]);
	writel(SUNXI_LCDC_TCON0_FRM_SEED, &lcdc->tcon0_frm_seed[5]);
	writel(SUNXI_LCDC_TCON0_FRM_TAB0, &lcdc->tcon0_frm_table[0]);
	writel(SUNXI_LCDC_TCON0_FRM_TAB1, &lcdc->tcon0_frm_table[1]);
	writel(SUNXI_LCDC_TCON0_FRM_TAB2, &lcdc->tcon0_frm_table[2]);
	writel(SUNXI_LCDC_TCON0_FRM_TAB3, &lcdc->tcon0_frm_table[3]);
	writel(((depth == 18) ?
	SUNXI_LCDC_TCON0_FRM_CTRL_RGB666 :
	SUNXI_LCDC_TCON0_FRM_CTRL_RGB565),
	&lcdc->tcon0_frm_ctrl);
	}

	val = SUNXI_LCDC_TCON0_IO_POL_DCLK_PHASE(dclk_phase);
	if (mode->flags & DISPLAY_FLAGS_HSYNC_LOW)
	val \|= SUNXI_LCDC_TCON_HSYNC_MASK;
	if (mode->flags & DISPLAY_FLAGS_VSYNC_LOW)
	val \|= SUNXI_LCDC_TCON_VSYNC_MASK;

	#ifdef CONFIG_VIDEO_VGA_VIA_LCD_FORCE_SYNC_ACTIVE_HIGH
	if (for_ext_vga_dac)
	val = 0;
	#endif
	writel(val, &lcdc->tcon0_io_polarity);

	writel(0, &lcdc->tcon0_io_tristate);
	}

	void lcdc_tcon1_mode_set(struct sunxi_lcdc_reg * const lcdc,
	const struct display_timing *mode,
	bool ext_hvsync, bool is_composite)
	{
	int bp, clk_delay, total, val, yres;

	#ifndef CONFIG_SUNXI_DE2
	/* Use tcon1 */
	clrsetbits_le32(&lcdc->ctrl, SUNXI_LCDC_CTRL_IO_MAP_MASK,
	SUNXI_LCDC_CTRL_IO_MAP_TCON1);
	#endif

	clk_delay = lcdc_get_clk_delay(mode, 1);
	writel(SUNXI_LCDC_TCON1_CTRL_ENABLE \|
	((mode->flags & DISPLAY_FLAGS_INTERLACED) ?
	SUNXI_LCDC_TCON1_CTRL_INTERLACE_ENABLE : 0) \|
	SUNXI_LCDC_TCON1_CTRL_CLK_DELAY(clk_delay), &lcdc->tcon1_ctrl);

	yres = mode->vactive.typ;
	if (mode->flags & DISPLAY_FLAGS_INTERLACED)
	yres /= 2;
	writel(SUNXI_LCDC_X(mode->hactive.typ) \| SUNXI_LCDC_Y(yres),
	&lcdc->tcon1_timing_source);
	writel(SUNXI_LCDC_X(mode->hactive.typ) \| SUNXI_LCDC_Y(yres),
	&lcdc->tcon1_timing_scale);
	writel(SUNXI_LCDC_X(mode->hactive.typ) \| SUNXI_LCDC_Y(yres),
	&lcdc->tcon1_timing_out);

	bp = mode->hsync_len.typ + mode->hback_porch.typ;
	total = mode->hactive.typ + mode->hfront_porch.typ + bp;
	writel(SUNXI_LCDC_TCON1_TIMING_H_TOTAL(total) \|
	SUNXI_LCDC_TCON1_TIMING_H_BP(bp), &lcdc->tcon1_timing_h);

	bp = mode->vsync_len.typ + mode->vback_porch.typ;
	total = mode->vactive.typ + mode->vfront_porch.typ + bp;
	if (!(mode->flags & DISPLAY_FLAGS_INTERLACED))
	total *= 2;
	writel(SUNXI_LCDC_TCON1_TIMING_V_TOTAL(total) \|
	SUNXI_LCDC_TCON1_TIMING_V_BP(bp), &lcdc->tcon1_timing_v);

	writel(SUNXI_LCDC_X(mode->hsync_len.typ) \|
	SUNXI_LCDC_Y(mode->vsync_len.typ), &lcdc->tcon1_timing_sync);

	if (ext_hvsync) {
	val = 0;
	if (mode->flags & DISPLAY_FLAGS_HSYNC_HIGH)
	val \|= SUNXI_LCDC_TCON_HSYNC_MASK;
	if (mode->flags & DISPLAY_FLAGS_VSYNC_HIGH)
	val \|= SUNXI_LCDC_TCON_VSYNC_MASK;
	writel(val, &lcdc->tcon1_io_polarity);

	clrbits_le32(&lcdc->tcon1_io_tristate,
	SUNXI_LCDC_TCON_VSYNC_MASK \|
	SUNXI_LCDC_TCON_HSYNC_MASK);
	}

	#ifdef CONFIG_MACH_SUN5I
	if (is_composite)
	clrsetbits_le32(&lcdc->mux_ctrl, SUNXI_LCDC_MUX_CTRL_SRC0_MASK,
	SUNXI_LCDC_MUX_CTRL_SRC0(1));
	#endif
	}

	void lcdc_pll_set(struct sunxi_ccm_reg *ccm, int tcon, int dotclock,
	int clk_div, int clk_double, bool is_composite)
	{
	int value, n, m, min_m, max_m, diff;
	int best_n = 0, best_m = 0, best_diff = 0x0FFFFFFF;
	int best_double = 0;
	bool use_mipi_pll = false;

	if (tcon == 0) {
	#if defined(CONFIG_VIDEO_LCD_IF_PARALLEL) \|\| defined(CONFIG_SUNXI_DE2)
	min_m = 6;
	max_m = 127;
	#endif
	#ifdef CONFIG_VIDEO_LCD_IF_LVDS
	min_m = 7;
	max_m = 7;
	#endif
	} else {
	min_m = 1;
	max_m = 15;
	}

	/*
	* Find the lowest divider resulting in a matching clock, if there
	* is no match, pick the closest lower clock, as monitors tend to
	* not sync to higher frequencies.
	*/
	for (m = min_m; m <= max_m; m++) {
	#ifndef CONFIG_SUNXI_DE2
	n = (m * dotclock) / 3000;

	if ((n >= 9) && (n <= 127)) {
	value = (3000 * n) / m;
	diff = dotclock - value;
	if (diff < best_diff) {
	best_diff = diff;
	best_m = m;
	best_n = n;
	best_double = 0;
	}
	}

	/* These are just duplicates */
	if (!(m & 1))
	continue;
	#endif

	/* No double clock on DE2 */
	n = (m * dotclock) / 6000;
	if ((n >= 9) && (n <= 127)) {
	value = (6000 * n) / m;
	diff = dotclock - value;
	if (diff < best_diff) {
	best_diff = diff;
	best_m = m;
	best_n = n;
	best_double = 1;
	}
	}
	}

	#ifdef CONFIG_MACH_SUN6I
	/*
	* Use the MIPI pll if we've been unable to find any matching setting
	* for PLL3, this happens with high dotclocks because of min_m = 6.
	*/
	if (tcon == 0 && best_n == 0) {
	use_mipi_pll = true;
	best_m = 6; /* Minimum m for tcon0 */
	}

	if (use_mipi_pll) {
	clock_set_pll3(297000000); /* Fix the video pll at 297 MHz */
	clock_set_mipi_pll(best_m * dotclock * 1000);
	debug("dotclock: %dkHz = %dkHz via mipi pll\n",
	dotclock, clock_get_mipi_pll() / best_m / 1000);
	} else
	#endif
	{
	clock_set_pll3(best_n * 3000000);
	debug("dotclock: %dkHz = %dkHz: (%d * 3MHz * %d) / %d\n",
	dotclock,
	(best_double + 1) * clock_get_pll3() / best_m / 1000,
	best_double + 1, best_n, best_m);
	}

	if (tcon == 0) {
	u32 pll;

	if (use_mipi_pll)
	pll = CCM_LCD_CH0_CTRL_MIPI_PLL;
	else if (best_double)
	pll = CCM_LCD_CH0_CTRL_PLL3_2X;
	else
	pll = CCM_LCD_CH0_CTRL_PLL3;
	#ifndef CONFIG_SUNXI_DE2
	writel(CCM_LCD_CH0_CTRL_GATE \| CCM_LCD_CH0_CTRL_RST \| pll,
	&ccm->lcd0_ch0_clk_cfg);
	#else
	writel(CCM_LCD_CH0_CTRL_GATE \| CCM_LCD_CH0_CTRL_RST \| pll,
	&ccm->lcd0_clk_cfg);
	#endif
	}
	#ifndef CONFIG_SUNXI_DE2
	else {
	writel(CCM_LCD_CH1_CTRL_GATE \|
	(best_double ? CCM_LCD_CH1_CTRL_PLL3_2X :
	CCM_LCD_CH1_CTRL_PLL3) \|
	CCM_LCD_CH1_CTRL_M(best_m), &ccm->lcd0_ch1_clk_cfg);
	if (is_composite)
	setbits_le32(&ccm->lcd0_ch1_clk_cfg,
	CCM_LCD_CH1_CTRL_HALF_SCLK1);
	}
	#endif

	*clk_div = best_m;
	*clk_double = best_double;
	}