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// 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 <log.h>
#include <linux/delay.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, step;
int best_n = 0, best_m = 0, best_diff = 0x0FFFFFFF;
int best_double = 0;
bool use_mipi_pll = false;
#ifdef CONFIG_SUNXI_DE2
step = 6000;
#else
step = 3000;
#endif
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) / step;
if ((n >= 9) && (n <= 127)) {
value = (step * 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) / (step * 2);
if ((n >= 9) && (n <= 127)) {
value = (step * 2 * 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 * step * 1000);
debug("dotclock: %dkHz = %dkHz: (%d * %dkHz * %d) / %d\n",
dotclock,
(best_double + 1) * clock_get_pll3() / best_m / 1000,
best_double + 1, step, 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;
}
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