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linux/drivers/media/platform/s5p-tv/hdmi_drv.c

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/*
* Samsung HDMI interface driver
*
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
*
* Tomasz Stanislawski, <t.stanislaws@samsung.com>
*
* 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 Foundiation. either version 2 of the License,
* or (at your option) any later version
*/
#define pr_fmt(fmt) "s5p-tv (hdmi_drv): " fmt
#ifdef CONFIG_VIDEO_SAMSUNG_S5P_HDMI_DEBUG
#define DEBUG
#endif
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <media/v4l2-subdev.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/bug.h>
#include <linux/pm_runtime.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include <linux/v4l2-dv-timings.h>
#include <media/s5p_hdmi.h>
#include <media/v4l2-common.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/v4l2-dv-timings.h>
#include "regs-hdmi.h"
MODULE_AUTHOR("Tomasz Stanislawski, <t.stanislaws@samsung.com>");
MODULE_DESCRIPTION("Samsung HDMI");
MODULE_LICENSE("GPL");
struct hdmi_pulse {
u32 beg;
u32 end;
};
struct hdmi_timings {
struct hdmi_pulse hact;
u32 hsyn_pol; /* 0 - high, 1 - low */
struct hdmi_pulse hsyn;
u32 interlaced;
struct hdmi_pulse vact[2];
u32 vsyn_pol; /* 0 - high, 1 - low */
u32 vsyn_off;
struct hdmi_pulse vsyn[2];
};
struct hdmi_resources {
struct clk *hdmi;
struct clk *sclk_hdmi;
struct clk *sclk_pixel;
struct clk *sclk_hdmiphy;
struct clk *hdmiphy;
struct regulator_bulk_data *regul_bulk;
int regul_count;
};
struct hdmi_device {
/** base address of HDMI registers */
void __iomem *regs;
/** HDMI interrupt */
unsigned int irq;
/** pointer to device parent */
struct device *dev;
/** subdev generated by HDMI device */
struct v4l2_subdev sd;
/** V4L2 device structure */
struct v4l2_device v4l2_dev;
/** subdev of HDMIPHY interface */
struct v4l2_subdev *phy_sd;
/** subdev of MHL interface */
struct v4l2_subdev *mhl_sd;
/** configuration of current graphic mode */
const struct hdmi_timings *cur_conf;
/** flag indicating that timings are dirty */
int cur_conf_dirty;
/** current timings */
struct v4l2_dv_timings cur_timings;
/** other resources */
struct hdmi_resources res;
};
static struct platform_device_id hdmi_driver_types[] = {
{
.name = "s5pv210-hdmi",
}, {
.name = "exynos4-hdmi",
}, {
/* end node */
}
};
static const struct v4l2_subdev_ops hdmi_sd_ops;
static struct hdmi_device *sd_to_hdmi_dev(struct v4l2_subdev *sd)
{
return container_of(sd, struct hdmi_device, sd);
}
static inline
void hdmi_write(struct hdmi_device *hdev, u32 reg_id, u32 value)
{
writel(value, hdev->regs + reg_id);
}
static inline
void hdmi_write_mask(struct hdmi_device *hdev, u32 reg_id, u32 value, u32 mask)
{
u32 old = readl(hdev->regs + reg_id);
value = (value & mask) | (old & ~mask);
writel(value, hdev->regs + reg_id);
}
static inline
void hdmi_writeb(struct hdmi_device *hdev, u32 reg_id, u8 value)
{
writeb(value, hdev->regs + reg_id);
}
static inline
void hdmi_writebn(struct hdmi_device *hdev, u32 reg_id, int n, u32 value)
{
switch (n) {
default:
writeb(value >> 24, hdev->regs + reg_id + 12);
case 3:
writeb(value >> 16, hdev->regs + reg_id + 8);
case 2:
writeb(value >> 8, hdev->regs + reg_id + 4);
case 1:
writeb(value >> 0, hdev->regs + reg_id + 0);
}
}
static inline u32 hdmi_read(struct hdmi_device *hdev, u32 reg_id)
{
return readl(hdev->regs + reg_id);
}
static irqreturn_t hdmi_irq_handler(int irq, void *dev_data)
{
struct hdmi_device *hdev = dev_data;
u32 intc_flag;
(void)irq;
intc_flag = hdmi_read(hdev, HDMI_INTC_FLAG);
/* clearing flags for HPD plug/unplug */
if (intc_flag & HDMI_INTC_FLAG_HPD_UNPLUG) {
pr_info("unplugged\n");
hdmi_write_mask(hdev, HDMI_INTC_FLAG, ~0,
HDMI_INTC_FLAG_HPD_UNPLUG);
}
if (intc_flag & HDMI_INTC_FLAG_HPD_PLUG) {
pr_info("plugged\n");
hdmi_write_mask(hdev, HDMI_INTC_FLAG, ~0,
HDMI_INTC_FLAG_HPD_PLUG);
}
return IRQ_HANDLED;
}
static void hdmi_reg_init(struct hdmi_device *hdev)
{
/* enable HPD interrupts */
hdmi_write_mask(hdev, HDMI_INTC_CON, ~0, HDMI_INTC_EN_GLOBAL |
HDMI_INTC_EN_HPD_PLUG | HDMI_INTC_EN_HPD_UNPLUG);
/* choose DVI mode */
hdmi_write_mask(hdev, HDMI_MODE_SEL,
HDMI_MODE_DVI_EN, HDMI_MODE_MASK);
hdmi_write_mask(hdev, HDMI_CON_2, ~0,
HDMI_DVI_PERAMBLE_EN | HDMI_DVI_BAND_EN);
/* disable bluescreen */
hdmi_write_mask(hdev, HDMI_CON_0, 0, HDMI_BLUE_SCR_EN);
/* choose bluescreen (fecal) color */
hdmi_writeb(hdev, HDMI_BLUE_SCREEN_0, 0x12);
hdmi_writeb(hdev, HDMI_BLUE_SCREEN_1, 0x34);
hdmi_writeb(hdev, HDMI_BLUE_SCREEN_2, 0x56);
}
static void hdmi_timing_apply(struct hdmi_device *hdev,
const struct hdmi_timings *t)
{
/* setting core registers */
hdmi_writebn(hdev, HDMI_H_BLANK_0, 2, t->hact.beg);
hdmi_writebn(hdev, HDMI_H_SYNC_GEN_0, 3,
(t->hsyn_pol << 20) | (t->hsyn.end << 10) | t->hsyn.beg);
hdmi_writeb(hdev, HDMI_VSYNC_POL, t->vsyn_pol);
hdmi_writebn(hdev, HDMI_V_BLANK_0, 3,
(t->vact[0].beg << 11) | t->vact[0].end);
hdmi_writebn(hdev, HDMI_V_SYNC_GEN_1_0, 3,
(t->vsyn[0].beg << 12) | t->vsyn[0].end);
if (t->interlaced) {
u32 vsyn_trans = t->hsyn.beg + t->vsyn_off;
hdmi_writeb(hdev, HDMI_INT_PRO_MODE, 1);
hdmi_writebn(hdev, HDMI_H_V_LINE_0, 3,
(t->hact.end << 12) | t->vact[1].end);
hdmi_writebn(hdev, HDMI_V_BLANK_F_0, 3,
(t->vact[1].end << 11) | t->vact[1].beg);
hdmi_writebn(hdev, HDMI_V_SYNC_GEN_2_0, 3,
(t->vsyn[1].beg << 12) | t->vsyn[1].end);
hdmi_writebn(hdev, HDMI_V_SYNC_GEN_3_0, 3,
(vsyn_trans << 12) | vsyn_trans);
} else {
hdmi_writeb(hdev, HDMI_INT_PRO_MODE, 0);
hdmi_writebn(hdev, HDMI_H_V_LINE_0, 3,
(t->hact.end << 12) | t->vact[0].end);
}
/* Timing generator registers */
hdmi_writebn(hdev, HDMI_TG_H_FSZ_L, 2, t->hact.end);
hdmi_writebn(hdev, HDMI_TG_HACT_ST_L, 2, t->hact.beg);
hdmi_writebn(hdev, HDMI_TG_HACT_SZ_L, 2, t->hact.end - t->hact.beg);
hdmi_writebn(hdev, HDMI_TG_VSYNC_L, 2, t->vsyn[0].beg);
hdmi_writebn(hdev, HDMI_TG_VACT_ST_L, 2, t->vact[0].beg);
hdmi_writebn(hdev, HDMI_TG_VACT_SZ_L, 2,
t->vact[0].end - t->vact[0].beg);
hdmi_writebn(hdev, HDMI_TG_VSYNC_TOP_HDMI_L, 2, t->vsyn[0].beg);
hdmi_writebn(hdev, HDMI_TG_FIELD_TOP_HDMI_L, 2, t->vsyn[0].beg);
if (t->interlaced) {
hdmi_write_mask(hdev, HDMI_TG_CMD, ~0, HDMI_TG_FIELD_EN);
hdmi_writebn(hdev, HDMI_TG_V_FSZ_L, 2, t->vact[1].end);
hdmi_writebn(hdev, HDMI_TG_VSYNC2_L, 2, t->vsyn[1].beg);
hdmi_writebn(hdev, HDMI_TG_FIELD_CHG_L, 2, t->vact[0].end);
hdmi_writebn(hdev, HDMI_TG_VACT_ST2_L, 2, t->vact[1].beg);
hdmi_writebn(hdev, HDMI_TG_VSYNC_BOT_HDMI_L, 2, t->vsyn[1].beg);
hdmi_writebn(hdev, HDMI_TG_FIELD_BOT_HDMI_L, 2, t->vsyn[1].beg);
} else {
hdmi_write_mask(hdev, HDMI_TG_CMD, 0, HDMI_TG_FIELD_EN);
hdmi_writebn(hdev, HDMI_TG_V_FSZ_L, 2, t->vact[0].end);
}
}
static int hdmi_conf_apply(struct hdmi_device *hdmi_dev)
{
struct device *dev = hdmi_dev->dev;
const struct hdmi_timings *conf = hdmi_dev->cur_conf;
int ret;
dev_dbg(dev, "%s\n", __func__);
/* skip if conf is already synchronized with HW */
if (!hdmi_dev->cur_conf_dirty)
return 0;
/* reset hdmiphy */
hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT, ~0, HDMI_PHY_SW_RSTOUT);
mdelay(10);
hdmi_write_mask(hdmi_dev, HDMI_PHY_RSTOUT, 0, HDMI_PHY_SW_RSTOUT);
mdelay(10);
/* configure timings */
ret = v4l2_subdev_call(hdmi_dev->phy_sd, video, s_dv_timings,
&hdmi_dev->cur_timings);
if (ret) {
dev_err(dev, "failed to set timings\n");
return ret;
}
/* resetting HDMI core */
hdmi_write_mask(hdmi_dev, HDMI_CORE_RSTOUT, 0, HDMI_CORE_SW_RSTOUT);
mdelay(10);
hdmi_write_mask(hdmi_dev, HDMI_CORE_RSTOUT, ~0, HDMI_CORE_SW_RSTOUT);
mdelay(10);
hdmi_reg_init(hdmi_dev);
/* setting core registers */
hdmi_timing_apply(hdmi_dev, conf);
hdmi_dev->cur_conf_dirty = 0;
return 0;
}
static void hdmi_dumpregs(struct hdmi_device *hdev, char *prefix)
{
#define DUMPREG(reg_id) \
dev_dbg(hdev->dev, "%s:" #reg_id " = %08x\n", prefix, \
readl(hdev->regs + reg_id))
dev_dbg(hdev->dev, "%s: ---- CONTROL REGISTERS ----\n", prefix);
DUMPREG(HDMI_INTC_FLAG);
DUMPREG(HDMI_INTC_CON);
DUMPREG(HDMI_HPD_STATUS);
DUMPREG(HDMI_PHY_RSTOUT);
DUMPREG(HDMI_PHY_VPLL);
DUMPREG(HDMI_PHY_CMU);
DUMPREG(HDMI_CORE_RSTOUT);
dev_dbg(hdev->dev, "%s: ---- CORE REGISTERS ----\n", prefix);
DUMPREG(HDMI_CON_0);
DUMPREG(HDMI_CON_1);
DUMPREG(HDMI_CON_2);
DUMPREG(HDMI_SYS_STATUS);
DUMPREG(HDMI_PHY_STATUS);
DUMPREG(HDMI_STATUS_EN);
DUMPREG(HDMI_HPD);
DUMPREG(HDMI_MODE_SEL);
DUMPREG(HDMI_HPD_GEN);
DUMPREG(HDMI_DC_CONTROL);
DUMPREG(HDMI_VIDEO_PATTERN_GEN);
dev_dbg(hdev->dev, "%s: ---- CORE SYNC REGISTERS ----\n", prefix);
DUMPREG(HDMI_H_BLANK_0);
DUMPREG(HDMI_H_BLANK_1);
DUMPREG(HDMI_V_BLANK_0);
DUMPREG(HDMI_V_BLANK_1);
DUMPREG(HDMI_V_BLANK_2);
DUMPREG(HDMI_H_V_LINE_0);
DUMPREG(HDMI_H_V_LINE_1);
DUMPREG(HDMI_H_V_LINE_2);
DUMPREG(HDMI_VSYNC_POL);
DUMPREG(HDMI_INT_PRO_MODE);
DUMPREG(HDMI_V_BLANK_F_0);
DUMPREG(HDMI_V_BLANK_F_1);
DUMPREG(HDMI_V_BLANK_F_2);
DUMPREG(HDMI_H_SYNC_GEN_0);
DUMPREG(HDMI_H_SYNC_GEN_1);
DUMPREG(HDMI_H_SYNC_GEN_2);
DUMPREG(HDMI_V_SYNC_GEN_1_0);
DUMPREG(HDMI_V_SYNC_GEN_1_1);
DUMPREG(HDMI_V_SYNC_GEN_1_2);
DUMPREG(HDMI_V_SYNC_GEN_2_0);
DUMPREG(HDMI_V_SYNC_GEN_2_1);
DUMPREG(HDMI_V_SYNC_GEN_2_2);
DUMPREG(HDMI_V_SYNC_GEN_3_0);
DUMPREG(HDMI_V_SYNC_GEN_3_1);
DUMPREG(HDMI_V_SYNC_GEN_3_2);
dev_dbg(hdev->dev, "%s: ---- TG REGISTERS ----\n", prefix);
DUMPREG(HDMI_TG_CMD);
DUMPREG(HDMI_TG_H_FSZ_L);
DUMPREG(HDMI_TG_H_FSZ_H);
DUMPREG(HDMI_TG_HACT_ST_L);
DUMPREG(HDMI_TG_HACT_ST_H);
DUMPREG(HDMI_TG_HACT_SZ_L);
DUMPREG(HDMI_TG_HACT_SZ_H);
DUMPREG(HDMI_TG_V_FSZ_L);
DUMPREG(HDMI_TG_V_FSZ_H);
DUMPREG(HDMI_TG_VSYNC_L);
DUMPREG(HDMI_TG_VSYNC_H);
DUMPREG(HDMI_TG_VSYNC2_L);
DUMPREG(HDMI_TG_VSYNC2_H);
DUMPREG(HDMI_TG_VACT_ST_L);
DUMPREG(HDMI_TG_VACT_ST_H);
DUMPREG(HDMI_TG_VACT_SZ_L);
DUMPREG(HDMI_TG_VACT_SZ_H);
DUMPREG(HDMI_TG_FIELD_CHG_L);
DUMPREG(HDMI_TG_FIELD_CHG_H);
DUMPREG(HDMI_TG_VACT_ST2_L);
DUMPREG(HDMI_TG_VACT_ST2_H);
DUMPREG(HDMI_TG_VSYNC_TOP_HDMI_L);
DUMPREG(HDMI_TG_VSYNC_TOP_HDMI_H);
DUMPREG(HDMI_TG_VSYNC_BOT_HDMI_L);
DUMPREG(HDMI_TG_VSYNC_BOT_HDMI_H);
DUMPREG(HDMI_TG_FIELD_TOP_HDMI_L);
DUMPREG(HDMI_TG_FIELD_TOP_HDMI_H);
DUMPREG(HDMI_TG_FIELD_BOT_HDMI_L);
DUMPREG(HDMI_TG_FIELD_BOT_HDMI_H);
#undef DUMPREG
}
static const struct hdmi_timings hdmi_timings_480p = {
.hact = { .beg = 138, .end = 858 },
.hsyn_pol = 1,
.hsyn = { .beg = 16, .end = 16 + 62 },
.interlaced = 0,
.vact[0] = { .beg = 42 + 3, .end = 522 + 3 },
.vsyn_pol = 1,
.vsyn[0] = { .beg = 6 + 3, .end = 12 + 3},
};
static const struct hdmi_timings hdmi_timings_576p50 = {
.hact = { .beg = 144, .end = 864 },
.hsyn_pol = 1,
.hsyn = { .beg = 12, .end = 12 + 64 },
.interlaced = 0,
.vact[0] = { .beg = 44 + 5, .end = 620 + 5 },
.vsyn_pol = 1,
.vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
};
static const struct hdmi_timings hdmi_timings_720p60 = {
.hact = { .beg = 370, .end = 1650 },
.hsyn_pol = 0,
.hsyn = { .beg = 110, .end = 110 + 40 },
.interlaced = 0,
.vact[0] = { .beg = 25 + 5, .end = 745 + 5 },
.vsyn_pol = 0,
.vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
};
static const struct hdmi_timings hdmi_timings_720p50 = {
.hact = { .beg = 700, .end = 1980 },
.hsyn_pol = 0,
.hsyn = { .beg = 440, .end = 440 + 40 },
.interlaced = 0,
.vact[0] = { .beg = 25 + 5, .end = 745 + 5 },
.vsyn_pol = 0,
.vsyn[0] = { .beg = 0 + 5, .end = 5 + 5},
};
static const struct hdmi_timings hdmi_timings_1080p24 = {
.hact = { .beg = 830, .end = 2750 },
.hsyn_pol = 0,
.hsyn = { .beg = 638, .end = 638 + 44 },
.interlaced = 0,
.vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
.vsyn_pol = 0,
.vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
};
static const struct hdmi_timings hdmi_timings_1080p60 = {
.hact = { .beg = 280, .end = 2200 },
.hsyn_pol = 0,
.hsyn = { .beg = 88, .end = 88 + 44 },
.interlaced = 0,
.vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
.vsyn_pol = 0,
.vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
};
static const struct hdmi_timings hdmi_timings_1080i60 = {
.hact = { .beg = 280, .end = 2200 },
.hsyn_pol = 0,
.hsyn = { .beg = 88, .end = 88 + 44 },
.interlaced = 1,
.vact[0] = { .beg = 20 + 2, .end = 560 + 2 },
.vact[1] = { .beg = 583 + 2, .end = 1123 + 2 },
.vsyn_pol = 0,
.vsyn_off = 1100,
.vsyn[0] = { .beg = 0 + 2, .end = 5 + 2},
.vsyn[1] = { .beg = 562 + 2, .end = 567 + 2},
};
static const struct hdmi_timings hdmi_timings_1080i50 = {
.hact = { .beg = 720, .end = 2640 },
.hsyn_pol = 0,
.hsyn = { .beg = 528, .end = 528 + 44 },
.interlaced = 1,
.vact[0] = { .beg = 20 + 2, .end = 560 + 2 },
.vact[1] = { .beg = 583 + 2, .end = 1123 + 2 },
.vsyn_pol = 0,
.vsyn_off = 1320,
.vsyn[0] = { .beg = 0 + 2, .end = 5 + 2},
.vsyn[1] = { .beg = 562 + 2, .end = 567 + 2},
};
static const struct hdmi_timings hdmi_timings_1080p50 = {
.hact = { .beg = 720, .end = 2640 },
.hsyn_pol = 0,
.hsyn = { .beg = 528, .end = 528 + 44 },
.interlaced = 0,
.vact[0] = { .beg = 41 + 4, .end = 1121 + 4 },
.vsyn_pol = 0,
.vsyn[0] = { .beg = 0 + 4, .end = 5 + 4},
};
/* default hdmi_timings index of the timings configured on probe */
#define HDMI_DEFAULT_TIMINGS_IDX (0)
static const struct {
bool reduced_fps;
const struct v4l2_dv_timings dv_timings;
const struct hdmi_timings *hdmi_timings;
} hdmi_timings[] = {
{ false, V4L2_DV_BT_CEA_720X480P59_94, &hdmi_timings_480p },
{ false, V4L2_DV_BT_CEA_720X576P50, &hdmi_timings_576p50 },
{ false, V4L2_DV_BT_CEA_1280X720P50, &hdmi_timings_720p50 },
{ true, V4L2_DV_BT_CEA_1280X720P60, &hdmi_timings_720p60 },
{ false, V4L2_DV_BT_CEA_1920X1080P24, &hdmi_timings_1080p24 },
{ false, V4L2_DV_BT_CEA_1920X1080P30, &hdmi_timings_1080p60 },
{ false, V4L2_DV_BT_CEA_1920X1080P50, &hdmi_timings_1080p50 },
{ false, V4L2_DV_BT_CEA_1920X1080I50, &hdmi_timings_1080i50 },
{ false, V4L2_DV_BT_CEA_1920X1080I60, &hdmi_timings_1080i60 },
{ false, V4L2_DV_BT_CEA_1920X1080P60, &hdmi_timings_1080p60 },
};
static int hdmi_streamon(struct hdmi_device *hdev)
{
struct device *dev = hdev->dev;
struct hdmi_resources *res = &hdev->res;
int ret, tries;
dev_dbg(dev, "%s\n", __func__);
ret = hdmi_conf_apply(hdev);
if (ret)
return ret;
ret = v4l2_subdev_call(hdev->phy_sd, video, s_stream, 1);
if (ret)
return ret;
/* waiting for HDMIPHY's PLL to get to steady state */
for (tries = 100; tries; --tries) {
u32 val = hdmi_read(hdev, HDMI_PHY_STATUS);
if (val & HDMI_PHY_STATUS_READY)
break;
mdelay(1);
}
/* steady state not achieved */
if (tries == 0) {
dev_err(dev, "hdmiphy's pll could not reach steady state.\n");
v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
hdmi_dumpregs(hdev, "hdmiphy - s_stream");
return -EIO;
}
/* starting MHL */
ret = v4l2_subdev_call(hdev->mhl_sd, video, s_stream, 1);
if (hdev->mhl_sd && ret) {
v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
hdmi_dumpregs(hdev, "mhl - s_stream");
return -EIO;
}
/* hdmiphy clock is used for HDMI in streaming mode */
clk_disable(res->sclk_hdmi);
clk_set_parent(res->sclk_hdmi, res->sclk_hdmiphy);
clk_enable(res->sclk_hdmi);
/* enable HDMI and timing generator */
hdmi_write_mask(hdev, HDMI_CON_0, ~0, HDMI_EN);
hdmi_write_mask(hdev, HDMI_TG_CMD, ~0, HDMI_TG_EN);
hdmi_dumpregs(hdev, "streamon");
return 0;
}
static int hdmi_streamoff(struct hdmi_device *hdev)
{
struct device *dev = hdev->dev;
struct hdmi_resources *res = &hdev->res;
dev_dbg(dev, "%s\n", __func__);
hdmi_write_mask(hdev, HDMI_CON_0, 0, HDMI_EN);
hdmi_write_mask(hdev, HDMI_TG_CMD, 0, HDMI_TG_EN);
/* pixel(vpll) clock is used for HDMI in config mode */
clk_disable(res->sclk_hdmi);
clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
clk_enable(res->sclk_hdmi);
v4l2_subdev_call(hdev->mhl_sd, video, s_stream, 0);
v4l2_subdev_call(hdev->phy_sd, video, s_stream, 0);
hdmi_dumpregs(hdev, "streamoff");
return 0;
}
static int hdmi_s_stream(struct v4l2_subdev *sd, int enable)
{
struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
struct device *dev = hdev->dev;
dev_dbg(dev, "%s(%d)\n", __func__, enable);
if (enable)
return hdmi_streamon(hdev);
return hdmi_streamoff(hdev);
}
static int hdmi_resource_poweron(struct hdmi_resources *res)
{
int ret;
/* turn HDMI power on */
ret = regulator_bulk_enable(res->regul_count, res->regul_bulk);
if (ret < 0)
return ret;
/* power-on hdmi physical interface */
clk_enable(res->hdmiphy);
/* use VPP as parent clock; HDMIPHY is not working yet */
clk_set_parent(res->sclk_hdmi, res->sclk_pixel);
/* turn clocks on */
clk_enable(res->sclk_hdmi);
return 0;
}
static void hdmi_resource_poweroff(struct hdmi_resources *res)
{
/* turn clocks off */
clk_disable(res->sclk_hdmi);
/* power-off hdmiphy */
clk_disable(res->hdmiphy);
/* turn HDMI power off */
regulator_bulk_disable(res->regul_count, res->regul_bulk);
}
static int hdmi_s_power(struct v4l2_subdev *sd, int on)
{
struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
int ret;
if (on)
ret = pm_runtime_get_sync(hdev->dev);
else
ret = pm_runtime_put_sync(hdev->dev);
/* only values < 0 indicate errors */
return IS_ERR_VALUE(ret) ? ret : 0;
}
static int hdmi_s_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
struct device *dev = hdev->dev;
int i;
for (i = 0; i < ARRAY_SIZE(hdmi_timings); i++)
if (v4l2_match_dv_timings(&hdmi_timings[i].dv_timings,
timings, 0))
break;
if (i == ARRAY_SIZE(hdmi_timings)) {
dev_err(dev, "timings not supported\n");
return -EINVAL;
}
hdev->cur_conf = hdmi_timings[i].hdmi_timings;
hdev->cur_conf_dirty = 1;
hdev->cur_timings = *timings;
if (!hdmi_timings[i].reduced_fps)
hdev->cur_timings.bt.flags &= ~V4L2_DV_FL_CAN_REDUCE_FPS;
return 0;
}
static int hdmi_g_dv_timings(struct v4l2_subdev *sd,
struct v4l2_dv_timings *timings)
{
*timings = sd_to_hdmi_dev(sd)->cur_timings;
return 0;
}
static int hdmi_g_mbus_fmt(struct v4l2_subdev *sd,
struct v4l2_mbus_framefmt *fmt)
{
struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
const struct hdmi_timings *t = hdev->cur_conf;
dev_dbg(hdev->dev, "%s\n", __func__);
if (!hdev->cur_conf)
return -EINVAL;
memset(fmt, 0, sizeof(*fmt));
fmt->width = t->hact.end - t->hact.beg;
fmt->height = t->vact[0].end - t->vact[0].beg;
fmt->code = V4L2_MBUS_FMT_FIXED; /* means RGB888 */
fmt->colorspace = V4L2_COLORSPACE_SRGB;
if (t->interlaced) {
fmt->field = V4L2_FIELD_INTERLACED;
fmt->height *= 2;
} else {
fmt->field = V4L2_FIELD_NONE;
}
return 0;
}
static int hdmi_enum_dv_timings(struct v4l2_subdev *sd,
struct v4l2_enum_dv_timings *timings)
{
if (timings->index >= ARRAY_SIZE(hdmi_timings))
return -EINVAL;
timings->timings = hdmi_timings[timings->index].dv_timings;
if (!hdmi_timings[timings->index].reduced_fps)
timings->timings.bt.flags &= ~V4L2_DV_FL_CAN_REDUCE_FPS;
return 0;
}
static int hdmi_dv_timings_cap(struct v4l2_subdev *sd,
struct v4l2_dv_timings_cap *cap)
{
struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
/* Let the phy fill in the pixelclock range */
v4l2_subdev_call(hdev->phy_sd, video, dv_timings_cap, cap);
cap->type = V4L2_DV_BT_656_1120;
cap->bt.min_width = 720;
cap->bt.max_width = 1920;
cap->bt.min_height = 480;
cap->bt.max_height = 1080;
cap->bt.standards = V4L2_DV_BT_STD_CEA861;
cap->bt.capabilities = V4L2_DV_BT_CAP_INTERLACED |
V4L2_DV_BT_CAP_PROGRESSIVE;
return 0;
}
static const struct v4l2_subdev_core_ops hdmi_sd_core_ops = {
.s_power = hdmi_s_power,
};
static const struct v4l2_subdev_video_ops hdmi_sd_video_ops = {
.s_dv_timings = hdmi_s_dv_timings,
.g_dv_timings = hdmi_g_dv_timings,
.enum_dv_timings = hdmi_enum_dv_timings,
.dv_timings_cap = hdmi_dv_timings_cap,
.g_mbus_fmt = hdmi_g_mbus_fmt,
.s_stream = hdmi_s_stream,
};
static const struct v4l2_subdev_ops hdmi_sd_ops = {
.core = &hdmi_sd_core_ops,
.video = &hdmi_sd_video_ops,
};
static int hdmi_runtime_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
dev_dbg(dev, "%s\n", __func__);
v4l2_subdev_call(hdev->mhl_sd, core, s_power, 0);
hdmi_resource_poweroff(&hdev->res);
/* flag that device context is lost */
hdev->cur_conf_dirty = 1;
return 0;
}
static int hdmi_runtime_resume(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct hdmi_device *hdev = sd_to_hdmi_dev(sd);
int ret;
dev_dbg(dev, "%s\n", __func__);
ret = hdmi_resource_poweron(&hdev->res);
if (ret < 0)
return ret;
/* starting MHL */
ret = v4l2_subdev_call(hdev->mhl_sd, core, s_power, 1);
if (hdev->mhl_sd && ret)
goto fail;
dev_dbg(dev, "poweron succeed\n");
return 0;
fail:
hdmi_resource_poweroff(&hdev->res);
dev_err(dev, "poweron failed\n");
return ret;
}
static const struct dev_pm_ops hdmi_pm_ops = {
.runtime_suspend = hdmi_runtime_suspend,
.runtime_resume = hdmi_runtime_resume,
};
static void hdmi_resource_clear_clocks(struct hdmi_resources *res)
{
res->hdmi = ERR_PTR(-EINVAL);
res->sclk_hdmi = ERR_PTR(-EINVAL);
res->sclk_pixel = ERR_PTR(-EINVAL);
res->sclk_hdmiphy = ERR_PTR(-EINVAL);
res->hdmiphy = ERR_PTR(-EINVAL);
}
static void hdmi_resources_cleanup(struct hdmi_device *hdev)
{
struct hdmi_resources *res = &hdev->res;
dev_dbg(hdev->dev, "HDMI resource cleanup\n");
/* put clocks, power */
if (res->regul_count)
regulator_bulk_free(res->regul_count, res->regul_bulk);
/* kfree is NULL-safe */
kfree(res->regul_bulk);
if (!IS_ERR(res->hdmiphy))
clk_put(res->hdmiphy);
if (!IS_ERR(res->sclk_hdmiphy))
clk_put(res->sclk_hdmiphy);
if (!IS_ERR(res->sclk_pixel))
clk_put(res->sclk_pixel);
if (!IS_ERR(res->sclk_hdmi))
clk_put(res->sclk_hdmi);
if (!IS_ERR(res->hdmi))
clk_put(res->hdmi);
memset(res, 0, sizeof(*res));
hdmi_resource_clear_clocks(res);
}
static int hdmi_resources_init(struct hdmi_device *hdev)
{
struct device *dev = hdev->dev;
struct hdmi_resources *res = &hdev->res;
static char *supply[] = {
"hdmi-en",
"vdd",
"vdd_osc",
"vdd_pll",
};
int i, ret;
dev_dbg(dev, "HDMI resource init\n");
memset(res, 0, sizeof(*res));
hdmi_resource_clear_clocks(res);
/* get clocks, power */
res->hdmi = clk_get(dev, "hdmi");
if (IS_ERR(res->hdmi)) {
dev_err(dev, "failed to get clock 'hdmi'\n");
goto fail;
}
res->sclk_hdmi = clk_get(dev, "sclk_hdmi");
if (IS_ERR(res->sclk_hdmi)) {
dev_err(dev, "failed to get clock 'sclk_hdmi'\n");
goto fail;
}
res->sclk_pixel = clk_get(dev, "sclk_pixel");
if (IS_ERR(res->sclk_pixel)) {
dev_err(dev, "failed to get clock 'sclk_pixel'\n");
goto fail;
}
res->sclk_hdmiphy = clk_get(dev, "sclk_hdmiphy");
if (IS_ERR(res->sclk_hdmiphy)) {
dev_err(dev, "failed to get clock 'sclk_hdmiphy'\n");
goto fail;
}
res->hdmiphy = clk_get(dev, "hdmiphy");
if (IS_ERR(res->hdmiphy)) {
dev_err(dev, "failed to get clock 'hdmiphy'\n");
goto fail;
}
res->regul_bulk = kcalloc(ARRAY_SIZE(supply),
sizeof(res->regul_bulk[0]), GFP_KERNEL);
if (!res->regul_bulk) {
dev_err(dev, "failed to get memory for regulators\n");
goto fail;
}
for (i = 0; i < ARRAY_SIZE(supply); ++i) {
res->regul_bulk[i].supply = supply[i];
res->regul_bulk[i].consumer = NULL;
}
ret = regulator_bulk_get(dev, ARRAY_SIZE(supply), res->regul_bulk);
if (ret) {
dev_err(dev, "failed to get regulators\n");
goto fail;
}
res->regul_count = ARRAY_SIZE(supply);
return 0;
fail:
dev_err(dev, "HDMI resource init - failed\n");
hdmi_resources_cleanup(hdev);
return -ENODEV;
}
static int hdmi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct i2c_adapter *adapter;
struct v4l2_subdev *sd;
struct hdmi_device *hdmi_dev = NULL;
struct s5p_hdmi_platform_data *pdata = dev->platform_data;
int ret;
dev_dbg(dev, "probe start\n");
if (!pdata) {
dev_err(dev, "platform data is missing\n");
ret = -ENODEV;
goto fail;
}
hdmi_dev = devm_kzalloc(&pdev->dev, sizeof(*hdmi_dev), GFP_KERNEL);
if (!hdmi_dev) {
dev_err(dev, "out of memory\n");
ret = -ENOMEM;
goto fail;
}
hdmi_dev->dev = dev;
ret = hdmi_resources_init(hdmi_dev);
if (ret)
goto fail;
/* mapping HDMI registers */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(dev, "get memory resource failed.\n");
ret = -ENXIO;
goto fail_init;
}
hdmi_dev->regs = devm_ioremap(&pdev->dev, res->start,
resource_size(res));
if (hdmi_dev->regs == NULL) {
dev_err(dev, "register mapping failed.\n");
ret = -ENXIO;
goto fail_init;
}
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res == NULL) {
dev_err(dev, "get interrupt resource failed.\n");
ret = -ENXIO;
goto fail_init;
}
ret = devm_request_irq(&pdev->dev, res->start, hdmi_irq_handler, 0,
"hdmi", hdmi_dev);
if (ret) {
dev_err(dev, "request interrupt failed.\n");
goto fail_init;
}
hdmi_dev->irq = res->start;
/* setting v4l2 name to prevent WARN_ON in v4l2_device_register */
strlcpy(hdmi_dev->v4l2_dev.name, dev_name(dev),
sizeof(hdmi_dev->v4l2_dev.name));
/* passing NULL owner prevents driver from erasing drvdata */
ret = v4l2_device_register(NULL, &hdmi_dev->v4l2_dev);
if (ret) {
dev_err(dev, "could not register v4l2 device.\n");
goto fail_init;
}
/* testing if hdmiphy info is present */
if (!pdata->hdmiphy_info) {
dev_err(dev, "hdmiphy info is missing in platform data\n");
ret = -ENXIO;
goto fail_vdev;
}
adapter = i2c_get_adapter(pdata->hdmiphy_bus);
if (adapter == NULL) {
dev_err(dev, "hdmiphy adapter request failed\n");
ret = -ENXIO;
goto fail_vdev;
}
hdmi_dev->phy_sd = v4l2_i2c_new_subdev_board(&hdmi_dev->v4l2_dev,
adapter, pdata->hdmiphy_info, NULL);
/* on failure or not adapter is no longer useful */
i2c_put_adapter(adapter);
if (hdmi_dev->phy_sd == NULL) {
dev_err(dev, "missing subdev for hdmiphy\n");
ret = -ENODEV;
goto fail_vdev;
}
/* initialization of MHL interface if present */
if (pdata->mhl_info) {
adapter = i2c_get_adapter(pdata->mhl_bus);
if (adapter == NULL) {
dev_err(dev, "MHL adapter request failed\n");
ret = -ENXIO;
goto fail_vdev;
}
hdmi_dev->mhl_sd = v4l2_i2c_new_subdev_board(
&hdmi_dev->v4l2_dev, adapter,
pdata->mhl_info, NULL);
/* on failure or not adapter is no longer useful */
i2c_put_adapter(adapter);
if (hdmi_dev->mhl_sd == NULL) {
dev_err(dev, "missing subdev for MHL\n");
ret = -ENODEV;
goto fail_vdev;
}
}
clk_enable(hdmi_dev->res.hdmi);
pm_runtime_enable(dev);
sd = &hdmi_dev->sd;
v4l2_subdev_init(sd, &hdmi_sd_ops);
sd->owner = THIS_MODULE;
strlcpy(sd->name, "s5p-hdmi", sizeof(sd->name));
hdmi_dev->cur_timings =
hdmi_timings[HDMI_DEFAULT_TIMINGS_IDX].dv_timings;
/* FIXME: missing fail timings is not supported */
hdmi_dev->cur_conf =
hdmi_timings[HDMI_DEFAULT_TIMINGS_IDX].hdmi_timings;
hdmi_dev->cur_conf_dirty = 1;
/* storing subdev for call that have only access to struct device */
dev_set_drvdata(dev, sd);
dev_info(dev, "probe successful\n");
return 0;
fail_vdev:
v4l2_device_unregister(&hdmi_dev->v4l2_dev);
fail_init:
hdmi_resources_cleanup(hdmi_dev);
fail:
dev_err(dev, "probe failed\n");
return ret;
}
static int hdmi_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct v4l2_subdev *sd = dev_get_drvdata(dev);
struct hdmi_device *hdmi_dev = sd_to_hdmi_dev(sd);
pm_runtime_disable(dev);
clk_disable(hdmi_dev->res.hdmi);
v4l2_device_unregister(&hdmi_dev->v4l2_dev);
disable_irq(hdmi_dev->irq);
hdmi_resources_cleanup(hdmi_dev);
dev_info(dev, "remove successful\n");
return 0;
}
static struct platform_driver hdmi_driver __refdata = {
.probe = hdmi_probe,
.remove = hdmi_remove,
.id_table = hdmi_driver_types,
.driver = {
.name = "s5p-hdmi",
.owner = THIS_MODULE,
.pm = &hdmi_pm_ops,
}
};
module_platform_driver(hdmi_driver);
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