AuxXxilium/linux_dsm_epyc7002
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cc7e962327
linux_dsm_epyc7002/drivers/gpu/drm/bridge/dw-hdmi.c
Laurent Pinchart cc7e962327 drm: bridge: dw-hdmi: Merge __hdmi_phy_i2c_write and hdmi_phy_i2c_write 
The latter is just an int wrapper around the former void function that
unconditionally returns 0. As the return value is never checked, merge
the two functions into one.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170117082910.27023-2-laurent.pinchart+renesas@ideasonboard.com
2017-01-18 09:29:29 +05:30

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/*
* DesignWare High-Definition Multimedia Interface (HDMI) driver
*
* Copyright (C) 2013-2015 Mentor Graphics Inc.
* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
* Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/hdmi.h>
#include <linux/mutex.h>
#include <linux/of_device.h>
#include <linux/spinlock.h>
#include <drm/drm_of.h>
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_encoder_slave.h>
#include <drm/bridge/dw_hdmi.h>
#include "dw-hdmi.h"
#include "dw-hdmi-audio.h"
#define HDMI_EDID_LEN 512
#define RGB 0
#define YCBCR444 1
#define YCBCR422_16BITS 2
#define YCBCR422_8BITS 3
#define XVYCC444 4
enum hdmi_datamap {
RGB444_8B = 0x01,
RGB444_10B = 0x03,
RGB444_12B = 0x05,
RGB444_16B = 0x07,
YCbCr444_8B = 0x09,
YCbCr444_10B = 0x0B,
YCbCr444_12B = 0x0D,
YCbCr444_16B = 0x0F,
YCbCr422_8B = 0x16,
YCbCr422_10B = 0x14,
YCbCr422_12B = 0x12,
};
static const u16 csc_coeff_default[3][4] = {
{ 0x2000, 0x0000, 0x0000, 0x0000 },
{ 0x0000, 0x2000, 0x0000, 0x0000 },
{ 0x0000, 0x0000, 0x2000, 0x0000 }
};
static const u16 csc_coeff_rgb_out_eitu601[3][4] = {
{ 0x2000, 0x6926, 0x74fd, 0x010e },
{ 0x2000, 0x2cdd, 0x0000, 0x7e9a },
{ 0x2000, 0x0000, 0x38b4, 0x7e3b }
};
static const u16 csc_coeff_rgb_out_eitu709[3][4] = {
{ 0x2000, 0x7106, 0x7a02, 0x00a7 },
{ 0x2000, 0x3264, 0x0000, 0x7e6d },
{ 0x2000, 0x0000, 0x3b61, 0x7e25 }
};
static const u16 csc_coeff_rgb_in_eitu601[3][4] = {
{ 0x2591, 0x1322, 0x074b, 0x0000 },
{ 0x6535, 0x2000, 0x7acc, 0x0200 },
{ 0x6acd, 0x7534, 0x2000, 0x0200 }
};
static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
{ 0x2dc5, 0x0d9b, 0x049e, 0x0000 },
{ 0x62f0, 0x2000, 0x7d11, 0x0200 },
{ 0x6756, 0x78ab, 0x2000, 0x0200 }
};
struct hdmi_vmode {
bool mdataenablepolarity;
unsigned int mpixelclock;
unsigned int mpixelrepetitioninput;
unsigned int mpixelrepetitionoutput;
};
struct hdmi_data_info {
unsigned int enc_in_format;
unsigned int enc_out_format;
unsigned int enc_color_depth;
unsigned int colorimetry;
unsigned int pix_repet_factor;
unsigned int hdcp_enable;
struct hdmi_vmode video_mode;
};
struct dw_hdmi_i2c {
struct i2c_adapter adap;
struct mutex lock; /* used to serialize data transfers */
struct completion cmp;
u8 stat;
u8 slave_reg;
bool is_regaddr;
};
struct dw_hdmi {
struct drm_connector connector;
struct drm_encoder *encoder;
struct drm_bridge *bridge;
struct platform_device *audio;
enum dw_hdmi_devtype dev_type;
struct device *dev;
struct clk *isfr_clk;
struct clk *iahb_clk;
struct dw_hdmi_i2c *i2c;
struct hdmi_data_info hdmi_data;
const struct dw_hdmi_plat_data *plat_data;
int vic;
u8 edid[HDMI_EDID_LEN];
bool cable_plugin;
bool phy_enabled;
struct drm_display_mode previous_mode;
struct i2c_adapter *ddc;
void __iomem *regs;
bool sink_is_hdmi;
bool sink_has_audio;
struct mutex mutex; /* for state below and previous_mode */
enum drm_connector_force force; /* mutex-protected force state */
bool disabled; /* DRM has disabled our bridge */
bool bridge_is_on; /* indicates the bridge is on */
bool rxsense; /* rxsense state */
u8 phy_mask; /* desired phy int mask settings */
spinlock_t audio_lock;
struct mutex audio_mutex;
unsigned int sample_rate;
unsigned int audio_cts;
unsigned int audio_n;
bool audio_enable;
void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
u8 (*read)(struct dw_hdmi *hdmi, int offset);
};
#define HDMI_IH_PHY_STAT0_RX_SENSE \
(HDMI_IH_PHY_STAT0_RX_SENSE0 | HDMI_IH_PHY_STAT0_RX_SENSE1 | \
HDMI_IH_PHY_STAT0_RX_SENSE2 | HDMI_IH_PHY_STAT0_RX_SENSE3)
#define HDMI_PHY_RX_SENSE \
(HDMI_PHY_RX_SENSE0 | HDMI_PHY_RX_SENSE1 | \
HDMI_PHY_RX_SENSE2 | HDMI_PHY_RX_SENSE3)
static void dw_hdmi_writel(struct dw_hdmi *hdmi, u8 val, int offset)
{
writel(val, hdmi->regs + (offset << 2));
}
static u8 dw_hdmi_readl(struct dw_hdmi *hdmi, int offset)
{
return readl(hdmi->regs + (offset << 2));
}
static void dw_hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
{
writeb(val, hdmi->regs + offset);
}
static u8 dw_hdmi_readb(struct dw_hdmi *hdmi, int offset)
{
return readb(hdmi->regs + offset);
}
static inline void hdmi_writeb(struct dw_hdmi *hdmi, u8 val, int offset)
{
hdmi->write(hdmi, val, offset);
}
static inline u8 hdmi_readb(struct dw_hdmi *hdmi, int offset)
{
return hdmi->read(hdmi, offset);
}
static void hdmi_modb(struct dw_hdmi *hdmi, u8 data, u8 mask, unsigned reg)
{
u8 val = hdmi_readb(hdmi, reg) & ~mask;
val |= data & mask;
hdmi_writeb(hdmi, val, reg);
}
static void hdmi_mask_writeb(struct dw_hdmi *hdmi, u8 data, unsigned int reg,
u8 shift, u8 mask)
{
hdmi_modb(hdmi, data << shift, mask, reg);
}
static void dw_hdmi_i2c_init(struct dw_hdmi *hdmi)
{
/* Software reset */
hdmi_writeb(hdmi, 0x00, HDMI_I2CM_SOFTRSTZ);
/* Set Standard Mode speed (determined to be 100KHz on iMX6) */
hdmi_writeb(hdmi, 0x00, HDMI_I2CM_DIV);
/* Set done, not acknowledged and arbitration interrupt polarities */
hdmi_writeb(hdmi, HDMI_I2CM_INT_DONE_POL, HDMI_I2CM_INT);
hdmi_writeb(hdmi, HDMI_I2CM_CTLINT_NAC_POL | HDMI_I2CM_CTLINT_ARB_POL,
HDMI_I2CM_CTLINT);
/* Clear DONE and ERROR interrupts */
hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
HDMI_IH_I2CM_STAT0);
/* Mute DONE and ERROR interrupts */
hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
HDMI_IH_MUTE_I2CM_STAT0);
}
static int dw_hdmi_i2c_read(struct dw_hdmi *hdmi,
unsigned char *buf, unsigned int length)
{
struct dw_hdmi_i2c *i2c = hdmi->i2c;
int stat;
if (!i2c->is_regaddr) {
dev_dbg(hdmi->dev, "set read register address to 0\n");
i2c->slave_reg = 0x00;
i2c->is_regaddr = true;
}
while (length--) {
reinit_completion(&i2c->cmp);
hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS);
hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_READ,
HDMI_I2CM_OPERATION);
stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10);
if (!stat)
return -EAGAIN;
/* Check for error condition on the bus */
if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR)
return -EIO;
*buf++ = hdmi_readb(hdmi, HDMI_I2CM_DATAI);
}
return 0;
}
static int dw_hdmi_i2c_write(struct dw_hdmi *hdmi,
unsigned char *buf, unsigned int length)
{
struct dw_hdmi_i2c *i2c = hdmi->i2c;
int stat;
if (!i2c->is_regaddr) {
/* Use the first write byte as register address */
i2c->slave_reg = buf[0];
length--;
buf++;
i2c->is_regaddr = true;
}
while (length--) {
reinit_completion(&i2c->cmp);
hdmi_writeb(hdmi, *buf++, HDMI_I2CM_DATAO);
hdmi_writeb(hdmi, i2c->slave_reg++, HDMI_I2CM_ADDRESS);
hdmi_writeb(hdmi, HDMI_I2CM_OPERATION_WRITE,
HDMI_I2CM_OPERATION);
stat = wait_for_completion_timeout(&i2c->cmp, HZ / 10);
if (!stat)
return -EAGAIN;
/* Check for error condition on the bus */
if (i2c->stat & HDMI_IH_I2CM_STAT0_ERROR)
return -EIO;
}
return 0;
}
static int dw_hdmi_i2c_xfer(struct i2c_adapter *adap,
struct i2c_msg *msgs, int num)
{
struct dw_hdmi *hdmi = i2c_get_adapdata(adap);
struct dw_hdmi_i2c *i2c = hdmi->i2c;
u8 addr = msgs[0].addr;
int i, ret = 0;
dev_dbg(hdmi->dev, "xfer: num: %d, addr: %#x\n", num, addr);
for (i = 0; i < num; i++) {
if (msgs[i].addr != addr) {
dev_warn(hdmi->dev,
"unsupported transfer, changed slave address\n");
return -EOPNOTSUPP;
}
if (msgs[i].len == 0) {
dev_dbg(hdmi->dev,
"unsupported transfer %d/%d, no data\n",
i + 1, num);
return -EOPNOTSUPP;
}
}
mutex_lock(&i2c->lock);
/* Unmute DONE and ERROR interrupts */
hdmi_writeb(hdmi, 0x00, HDMI_IH_MUTE_I2CM_STAT0);
/* Set slave device address taken from the first I2C message */
hdmi_writeb(hdmi, addr, HDMI_I2CM_SLAVE);
/* Set slave device register address on transfer */
i2c->is_regaddr = false;
for (i = 0; i < num; i++) {
dev_dbg(hdmi->dev, "xfer: num: %d/%d, len: %d, flags: %#x\n",
i + 1, num, msgs[i].len, msgs[i].flags);
if (msgs[i].flags & I2C_M_RD)
ret = dw_hdmi_i2c_read(hdmi, msgs[i].buf, msgs[i].len);
else
ret = dw_hdmi_i2c_write(hdmi, msgs[i].buf, msgs[i].len);
if (ret < 0)
break;
}
if (!ret)
ret = num;
/* Mute DONE and ERROR interrupts */
hdmi_writeb(hdmi, HDMI_IH_I2CM_STAT0_ERROR | HDMI_IH_I2CM_STAT0_DONE,
HDMI_IH_MUTE_I2CM_STAT0);
mutex_unlock(&i2c->lock);
return ret;
}
static u32 dw_hdmi_i2c_func(struct i2c_adapter *adapter)
{
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
static const struct i2c_algorithm dw_hdmi_algorithm = {
.master_xfer = dw_hdmi_i2c_xfer,
.functionality = dw_hdmi_i2c_func,
};
static struct i2c_adapter *dw_hdmi_i2c_adapter(struct dw_hdmi *hdmi)
{
struct i2c_adapter *adap;
struct dw_hdmi_i2c *i2c;
int ret;
i2c = devm_kzalloc(hdmi->dev, sizeof(*i2c), GFP_KERNEL);
if (!i2c)
return ERR_PTR(-ENOMEM);
mutex_init(&i2c->lock);
init_completion(&i2c->cmp);
adap = &i2c->adap;
adap->class = I2C_CLASS_DDC;
adap->owner = THIS_MODULE;
adap->dev.parent = hdmi->dev;
adap->algo = &dw_hdmi_algorithm;
strlcpy(adap->name, "DesignWare HDMI", sizeof(adap->name));
i2c_set_adapdata(adap, hdmi);
ret = i2c_add_adapter(adap);
if (ret) {
dev_warn(hdmi->dev, "cannot add %s I2C adapter\n", adap->name);
devm_kfree(hdmi->dev, i2c);
return ERR_PTR(ret);
}
hdmi->i2c = i2c;
dev_info(hdmi->dev, "registered %s I2C bus driver\n", adap->name);
return adap;
}
static void hdmi_set_cts_n(struct dw_hdmi *hdmi, unsigned int cts,
unsigned int n)
{
/* Must be set/cleared first */
hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
/* nshift factor = 0 */
hdmi_modb(hdmi, 0, HDMI_AUD_CTS3_N_SHIFT_MASK, HDMI_AUD_CTS3);
hdmi_writeb(hdmi, ((cts >> 16) & HDMI_AUD_CTS3_AUDCTS19_16_MASK) |
HDMI_AUD_CTS3_CTS_MANUAL, HDMI_AUD_CTS3);
hdmi_writeb(hdmi, (cts >> 8) & 0xff, HDMI_AUD_CTS2);
hdmi_writeb(hdmi, cts & 0xff, HDMI_AUD_CTS1);
hdmi_writeb(hdmi, (n >> 16) & 0x0f, HDMI_AUD_N3);
hdmi_writeb(hdmi, (n >> 8) & 0xff, HDMI_AUD_N2);
hdmi_writeb(hdmi, n & 0xff, HDMI_AUD_N1);
}
static unsigned int hdmi_compute_n(unsigned int freq, unsigned long pixel_clk)
{
unsigned int n = (128 * freq) / 1000;
unsigned int mult = 1;
while (freq > 48000) {
mult *= 2;
freq /= 2;
}
switch (freq) {
case 32000:
if (pixel_clk == 25175000)
n = 4576;
else if (pixel_clk == 27027000)
n = 4096;
else if (pixel_clk == 74176000 || pixel_clk == 148352000)
n = 11648;
else
n = 4096;
n *= mult;
break;
case 44100:
if (pixel_clk == 25175000)
n = 7007;
else if (pixel_clk == 74176000)
n = 17836;
else if (pixel_clk == 148352000)
n = 8918;
else
n = 6272;
n *= mult;
break;
case 48000:
if (pixel_clk == 25175000)
n = 6864;
else if (pixel_clk == 27027000)
n = 6144;
else if (pixel_clk == 74176000)
n = 11648;
else if (pixel_clk == 148352000)
n = 5824;
else
n = 6144;
n *= mult;
break;
default:
break;
}
return n;
}
static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
unsigned long pixel_clk, unsigned int sample_rate)
{
unsigned long ftdms = pixel_clk;
unsigned int n, cts;
u64 tmp;
n = hdmi_compute_n(sample_rate, pixel_clk);
/*
* Compute the CTS value from the N value. Note that CTS and N
* can be up to 20 bits in total, so we need 64-bit math. Also
* note that our TDMS clock is not fully accurate; it is accurate
* to kHz. This can introduce an unnecessary remainder in the
* calculation below, so we don't try to warn about that.
*/
tmp = (u64)ftdms * n;
do_div(tmp, 128 * sample_rate);
cts = tmp;
dev_dbg(hdmi->dev, "%s: fs=%uHz ftdms=%lu.%03luMHz N=%d cts=%d\n",
__func__, sample_rate, ftdms / 1000000, (ftdms / 1000) % 1000,
n, cts);
spin_lock_irq(&hdmi->audio_lock);
hdmi->audio_n = n;
hdmi->audio_cts = cts;
hdmi_set_cts_n(hdmi, cts, hdmi->audio_enable ? n : 0);
spin_unlock_irq(&hdmi->audio_lock);
}
static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
{
mutex_lock(&hdmi->audio_mutex);
hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate);
mutex_unlock(&hdmi->audio_mutex);
}
static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
{
mutex_lock(&hdmi->audio_mutex);
hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
hdmi->sample_rate);
mutex_unlock(&hdmi->audio_mutex);
}
void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
{
mutex_lock(&hdmi->audio_mutex);
hdmi->sample_rate = rate;
hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
hdmi->sample_rate);
mutex_unlock(&hdmi->audio_mutex);
}
EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
void dw_hdmi_audio_enable(struct dw_hdmi *hdmi)
{
unsigned long flags;
spin_lock_irqsave(&hdmi->audio_lock, flags);
hdmi->audio_enable = true;
hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
spin_unlock_irqrestore(&hdmi->audio_lock, flags);
}
EXPORT_SYMBOL_GPL(dw_hdmi_audio_enable);
void dw_hdmi_audio_disable(struct dw_hdmi *hdmi)
{
unsigned long flags;
spin_lock_irqsave(&hdmi->audio_lock, flags);
hdmi->audio_enable = false;
hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0);
spin_unlock_irqrestore(&hdmi->audio_lock, flags);
}
EXPORT_SYMBOL_GPL(dw_hdmi_audio_disable);
/*
* this submodule is responsible for the video data synchronization.
* for example, for RGB 4:4:4 input, the data map is defined as
* pin{47~40} <==> R[7:0]
* pin{31~24} <==> G[7:0]
* pin{15~8} <==> B[7:0]
*/
static void hdmi_video_sample(struct dw_hdmi *hdmi)
{
int color_format = 0;
u8 val;
if (hdmi->hdmi_data.enc_in_format == RGB) {
if (hdmi->hdmi_data.enc_color_depth == 8)
color_format = 0x01;
else if (hdmi->hdmi_data.enc_color_depth == 10)
color_format = 0x03;
else if (hdmi->hdmi_data.enc_color_depth == 12)
color_format = 0x05;
else if (hdmi->hdmi_data.enc_color_depth == 16)
color_format = 0x07;
else
return;
} else if (hdmi->hdmi_data.enc_in_format == YCBCR444) {
if (hdmi->hdmi_data.enc_color_depth == 8)
color_format = 0x09;
else if (hdmi->hdmi_data.enc_color_depth == 10)
color_format = 0x0B;
else if (hdmi->hdmi_data.enc_color_depth == 12)
color_format = 0x0D;
else if (hdmi->hdmi_data.enc_color_depth == 16)
color_format = 0x0F;
else
return;
} else if (hdmi->hdmi_data.enc_in_format == YCBCR422_8BITS) {
if (hdmi->hdmi_data.enc_color_depth == 8)
color_format = 0x16;
else if (hdmi->hdmi_data.enc_color_depth == 10)
color_format = 0x14;
else if (hdmi->hdmi_data.enc_color_depth == 12)
color_format = 0x12;
else
return;
}
val = HDMI_TX_INVID0_INTERNAL_DE_GENERATOR_DISABLE |
((color_format << HDMI_TX_INVID0_VIDEO_MAPPING_OFFSET) &
HDMI_TX_INVID0_VIDEO_MAPPING_MASK);
hdmi_writeb(hdmi, val, HDMI_TX_INVID0);
/* Enable TX stuffing: When DE is inactive, fix the output data to 0 */
val = HDMI_TX_INSTUFFING_BDBDATA_STUFFING_ENABLE |
HDMI_TX_INSTUFFING_RCRDATA_STUFFING_ENABLE |
HDMI_TX_INSTUFFING_GYDATA_STUFFING_ENABLE;
hdmi_writeb(hdmi, val, HDMI_TX_INSTUFFING);
hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA0);
hdmi_writeb(hdmi, 0x0, HDMI_TX_GYDATA1);
hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA0);
hdmi_writeb(hdmi, 0x0, HDMI_TX_RCRDATA1);
hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA0);
hdmi_writeb(hdmi, 0x0, HDMI_TX_BCBDATA1);
}
static int is_color_space_conversion(struct dw_hdmi *hdmi)
{
return hdmi->hdmi_data.enc_in_format != hdmi->hdmi_data.enc_out_format;
}
static int is_color_space_decimation(struct dw_hdmi *hdmi)
{
if (hdmi->hdmi_data.enc_out_format != YCBCR422_8BITS)
return 0;
if (hdmi->hdmi_data.enc_in_format == RGB ||
hdmi->hdmi_data.enc_in_format == YCBCR444)
return 1;
return 0;
}
static int is_color_space_interpolation(struct dw_hdmi *hdmi)
{
if (hdmi->hdmi_data.enc_in_format != YCBCR422_8BITS)
return 0;
if (hdmi->hdmi_data.enc_out_format == RGB ||
hdmi->hdmi_data.enc_out_format == YCBCR444)
return 1;
return 0;
}
static void dw_hdmi_update_csc_coeffs(struct dw_hdmi *hdmi)
{
const u16 (*csc_coeff)[3][4] = &csc_coeff_default;
unsigned i;
u32 csc_scale = 1;
if (is_color_space_conversion(hdmi)) {
if (hdmi->hdmi_data.enc_out_format == RGB) {
if (hdmi->hdmi_data.colorimetry ==
HDMI_COLORIMETRY_ITU_601)
csc_coeff = &csc_coeff_rgb_out_eitu601;
else
csc_coeff = &csc_coeff_rgb_out_eitu709;
} else if (hdmi->hdmi_data.enc_in_format == RGB) {
if (hdmi->hdmi_data.colorimetry ==
HDMI_COLORIMETRY_ITU_601)
csc_coeff = &csc_coeff_rgb_in_eitu601;
else
csc_coeff = &csc_coeff_rgb_in_eitu709;
csc_scale = 0;
}
}
/* The CSC registers are sequential, alternating MSB then LSB */
for (i = 0; i < ARRAY_SIZE(csc_coeff_default[0]); i++) {
u16 coeff_a = (*csc_coeff)[0][i];
u16 coeff_b = (*csc_coeff)[1][i];
u16 coeff_c = (*csc_coeff)[2][i];
hdmi_writeb(hdmi, coeff_a & 0xff, HDMI_CSC_COEF_A1_LSB + i * 2);
hdmi_writeb(hdmi, coeff_a >> 8, HDMI_CSC_COEF_A1_MSB + i * 2);
hdmi_writeb(hdmi, coeff_b & 0xff, HDMI_CSC_COEF_B1_LSB + i * 2);
hdmi_writeb(hdmi, coeff_b >> 8, HDMI_CSC_COEF_B1_MSB + i * 2);
hdmi_writeb(hdmi, coeff_c & 0xff, HDMI_CSC_COEF_C1_LSB + i * 2);
hdmi_writeb(hdmi, coeff_c >> 8, HDMI_CSC_COEF_C1_MSB + i * 2);
}
hdmi_modb(hdmi, csc_scale, HDMI_CSC_SCALE_CSCSCALE_MASK,
HDMI_CSC_SCALE);
}
static void hdmi_video_csc(struct dw_hdmi *hdmi)
{
int color_depth = 0;
int interpolation = HDMI_CSC_CFG_INTMODE_DISABLE;
int decimation = 0;
/* YCC422 interpolation to 444 mode */
if (is_color_space_interpolation(hdmi))
interpolation = HDMI_CSC_CFG_INTMODE_CHROMA_INT_FORMULA1;
else if (is_color_space_decimation(hdmi))
decimation = HDMI_CSC_CFG_DECMODE_CHROMA_INT_FORMULA3;
if (hdmi->hdmi_data.enc_color_depth == 8)
color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_24BPP;
else if (hdmi->hdmi_data.enc_color_depth == 10)
color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_30BPP;
else if (hdmi->hdmi_data.enc_color_depth == 12)
color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_36BPP;
else if (hdmi->hdmi_data.enc_color_depth == 16)
color_depth = HDMI_CSC_SCALE_CSC_COLORDE_PTH_48BPP;
else
return;
/* Configure the CSC registers */
hdmi_writeb(hdmi, interpolation | decimation, HDMI_CSC_CFG);
hdmi_modb(hdmi, color_depth, HDMI_CSC_SCALE_CSC_COLORDE_PTH_MASK,
HDMI_CSC_SCALE);
dw_hdmi_update_csc_coeffs(hdmi);
}
/*
* HDMI video packetizer is used to packetize the data.
* for example, if input is YCC422 mode or repeater is used,
* data should be repacked this module can be bypassed.
*/
static void hdmi_video_packetize(struct dw_hdmi *hdmi)
{
unsigned int color_depth = 0;
unsigned int remap_size = HDMI_VP_REMAP_YCC422_16bit;
unsigned int output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_PP;
struct hdmi_data_info *hdmi_data = &hdmi->hdmi_data;
u8 val, vp_conf;
if (hdmi_data->enc_out_format == RGB ||
hdmi_data->enc_out_format == YCBCR444) {
if (!hdmi_data->enc_color_depth) {
output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
} else if (hdmi_data->enc_color_depth == 8) {
color_depth = 4;
output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS;
} else if (hdmi_data->enc_color_depth == 10) {
color_depth = 5;
} else if (hdmi_data->enc_color_depth == 12) {
color_depth = 6;
} else if (hdmi_data->enc_color_depth == 16) {
color_depth = 7;
} else {
return;
}
} else if (hdmi_data->enc_out_format == YCBCR422_8BITS) {
if (!hdmi_data->enc_color_depth ||
hdmi_data->enc_color_depth == 8)
remap_size = HDMI_VP_REMAP_YCC422_16bit;
else if (hdmi_data->enc_color_depth == 10)
remap_size = HDMI_VP_REMAP_YCC422_20bit;
else if (hdmi_data->enc_color_depth == 12)
remap_size = HDMI_VP_REMAP_YCC422_24bit;
else
return;
output_select = HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422;
} else {
return;
}
/* set the packetizer registers */
val = ((color_depth << HDMI_VP_PR_CD_COLOR_DEPTH_OFFSET) &
HDMI_VP_PR_CD_COLOR_DEPTH_MASK) |
((hdmi_data->pix_repet_factor <<
HDMI_VP_PR_CD_DESIRED_PR_FACTOR_OFFSET) &
HDMI_VP_PR_CD_DESIRED_PR_FACTOR_MASK);
hdmi_writeb(hdmi, val, HDMI_VP_PR_CD);
hdmi_modb(hdmi, HDMI_VP_STUFF_PR_STUFFING_STUFFING_MODE,
HDMI_VP_STUFF_PR_STUFFING_MASK, HDMI_VP_STUFF);
/* Data from pixel repeater block */
if (hdmi_data->pix_repet_factor > 1) {
vp_conf = HDMI_VP_CONF_PR_EN_ENABLE |
HDMI_VP_CONF_BYPASS_SELECT_PIX_REPEATER;
} else { /* data from packetizer block */
vp_conf = HDMI_VP_CONF_PR_EN_DISABLE |
HDMI_VP_CONF_BYPASS_SELECT_VID_PACKETIZER;
}
hdmi_modb(hdmi, vp_conf,
HDMI_VP_CONF_PR_EN_MASK |
HDMI_VP_CONF_BYPASS_SELECT_MASK, HDMI_VP_CONF);
hdmi_modb(hdmi, 1 << HDMI_VP_STUFF_IDEFAULT_PHASE_OFFSET,
HDMI_VP_STUFF_IDEFAULT_PHASE_MASK, HDMI_VP_STUFF);
hdmi_writeb(hdmi, remap_size, HDMI_VP_REMAP);
if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_PP) {
vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
HDMI_VP_CONF_PP_EN_ENABLE |
HDMI_VP_CONF_YCC422_EN_DISABLE;
} else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_YCC422) {
vp_conf = HDMI_VP_CONF_BYPASS_EN_DISABLE |
HDMI_VP_CONF_PP_EN_DISABLE |
HDMI_VP_CONF_YCC422_EN_ENABLE;
} else if (output_select == HDMI_VP_CONF_OUTPUT_SELECTOR_BYPASS) {
vp_conf = HDMI_VP_CONF_BYPASS_EN_ENABLE |
HDMI_VP_CONF_PP_EN_DISABLE |
HDMI_VP_CONF_YCC422_EN_DISABLE;
} else {
return;
}
hdmi_modb(hdmi, vp_conf,
HDMI_VP_CONF_BYPASS_EN_MASK | HDMI_VP_CONF_PP_EN_ENMASK |
HDMI_VP_CONF_YCC422_EN_MASK, HDMI_VP_CONF);
hdmi_modb(hdmi, HDMI_VP_STUFF_PP_STUFFING_STUFFING_MODE |
HDMI_VP_STUFF_YCC422_STUFFING_STUFFING_MODE,
HDMI_VP_STUFF_PP_STUFFING_MASK |
HDMI_VP_STUFF_YCC422_STUFFING_MASK, HDMI_VP_STUFF);
hdmi_modb(hdmi, output_select, HDMI_VP_CONF_OUTPUT_SELECTOR_MASK,
HDMI_VP_CONF);
}
static inline void hdmi_phy_test_clear(struct dw_hdmi *hdmi,
unsigned char bit)
{
hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLR_OFFSET,
HDMI_PHY_TST0_TSTCLR_MASK, HDMI_PHY_TST0);
}
static inline void hdmi_phy_test_enable(struct dw_hdmi *hdmi,
unsigned char bit)
{
hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTEN_OFFSET,
HDMI_PHY_TST0_TSTEN_MASK, HDMI_PHY_TST0);
}
static inline void hdmi_phy_test_clock(struct dw_hdmi *hdmi,
unsigned char bit)
{
hdmi_modb(hdmi, bit << HDMI_PHY_TST0_TSTCLK_OFFSET,
HDMI_PHY_TST0_TSTCLK_MASK, HDMI_PHY_TST0);
}
static inline void hdmi_phy_test_din(struct dw_hdmi *hdmi,
unsigned char bit)
{
hdmi_writeb(hdmi, bit, HDMI_PHY_TST1);
}
static inline void hdmi_phy_test_dout(struct dw_hdmi *hdmi,
unsigned char bit)
{
hdmi_writeb(hdmi, bit, HDMI_PHY_TST2);
}
static bool hdmi_phy_wait_i2c_done(struct dw_hdmi *hdmi, int msec)
{
u32 val;
while ((val = hdmi_readb(hdmi, HDMI_IH_I2CMPHY_STAT0) & 0x3) == 0) {
if (msec-- == 0)
return false;
udelay(1000);
}
hdmi_writeb(hdmi, val, HDMI_IH_I2CMPHY_STAT0);
return true;
}
static void hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
unsigned char addr)
{
hdmi_writeb(hdmi, 0xFF, HDMI_IH_I2CMPHY_STAT0);
hdmi_writeb(hdmi, addr, HDMI_PHY_I2CM_ADDRESS_ADDR);
hdmi_writeb(hdmi, (unsigned char)(data >> 8),
HDMI_PHY_I2CM_DATAO_1_ADDR);
hdmi_writeb(hdmi, (unsigned char)(data >> 0),
HDMI_PHY_I2CM_DATAO_0_ADDR);
hdmi_writeb(hdmi, HDMI_PHY_I2CM_OPERATION_ADDR_WRITE,
HDMI_PHY_I2CM_OPERATION_ADDR);
hdmi_phy_wait_i2c_done(hdmi, 1000);
}
static void dw_hdmi_phy_enable_powerdown(struct dw_hdmi *hdmi, bool enable)
{
hdmi_mask_writeb(hdmi, !enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_PDZ_OFFSET,
HDMI_PHY_CONF0_PDZ_MASK);
}
static void dw_hdmi_phy_enable_tmds(struct dw_hdmi *hdmi, u8 enable)
{
hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_ENTMDS_OFFSET,
HDMI_PHY_CONF0_ENTMDS_MASK);
}
static void dw_hdmi_phy_enable_spare(struct dw_hdmi *hdmi, u8 enable)
{
hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_SPARECTRL_OFFSET,
HDMI_PHY_CONF0_SPARECTRL_MASK);
}
static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
{
hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
}
static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
{
hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
}
static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
{
hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_SELDATAENPOL_OFFSET,
HDMI_PHY_CONF0_SELDATAENPOL_MASK);
}
static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
{
hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
HDMI_PHY_CONF0_SELDIPIF_OFFSET,
HDMI_PHY_CONF0_SELDIPIF_MASK);
}
static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
unsigned char res, int cscon)
{
unsigned res_idx;
u8 val, msec;
const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
const struct dw_hdmi_mpll_config *mpll_config = pdata->mpll_cfg;
const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr;
const struct dw_hdmi_phy_config *phy_config = pdata->phy_config;
if (prep)
return -EINVAL;
switch (res) {
case 0: /* color resolution 0 is 8 bit colour depth */
case 8:
res_idx = DW_HDMI_RES_8;
break;
case 10:
res_idx = DW_HDMI_RES_10;
break;
case 12:
res_idx = DW_HDMI_RES_12;
break;
default:
return -EINVAL;
}
/* PLL/MPLL Cfg - always match on final entry */
for (; mpll_config->mpixelclock != ~0UL; mpll_config++)
if (hdmi->hdmi_data.video_mode.mpixelclock <=
mpll_config->mpixelclock)
break;
for (; curr_ctrl->mpixelclock != ~0UL; curr_ctrl++)
if (hdmi->hdmi_data.video_mode.mpixelclock <=
curr_ctrl->mpixelclock)
break;
for (; phy_config->mpixelclock != ~0UL; phy_config++)
if (hdmi->hdmi_data.video_mode.mpixelclock <=
phy_config->mpixelclock)
break;
if (mpll_config->mpixelclock == ~0UL ||
curr_ctrl->mpixelclock == ~0UL ||
phy_config->mpixelclock == ~0UL) {
dev_err(hdmi->dev, "Pixel clock %d - unsupported by HDMI\n",
hdmi->hdmi_data.video_mode.mpixelclock);
return -EINVAL;
}
/* Enable csc path */
if (cscon)
val = HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH;
else
val = HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_BYPASS;
hdmi_writeb(hdmi, val, HDMI_MC_FLOWCTRL);
/* gen2 tx power off */
dw_hdmi_phy_gen2_txpwron(hdmi, 0);
/* gen2 pddq */
dw_hdmi_phy_gen2_pddq(hdmi, 1);
/* PHY reset */
hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_DEASSERT, HDMI_MC_PHYRSTZ);
hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_ASSERT, HDMI_MC_PHYRSTZ);
hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
hdmi_phy_test_clear(hdmi, 1);
hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
HDMI_PHY_I2CM_SLAVE_ADDR);
hdmi_phy_test_clear(hdmi, 0);
hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].cpce, 0x06);
hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].gmp, 0x15);
/* CURRCTRL */
hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[res_idx], 0x10);
hdmi_phy_i2c_write(hdmi, 0x0000, 0x13); /* PLLPHBYCTRL */
hdmi_phy_i2c_write(hdmi, 0x0006, 0x17);
hdmi_phy_i2c_write(hdmi, phy_config->term, 0x19); /* TXTERM */
hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr, 0x09); /* CKSYMTXCTRL */
hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr, 0x0E); /* VLEVCTRL */
/* REMOVE CLK TERM */
hdmi_phy_i2c_write(hdmi, 0x8000, 0x05); /* CKCALCTRL */
dw_hdmi_phy_enable_powerdown(hdmi, false);
/* toggle TMDS enable */
dw_hdmi_phy_enable_tmds(hdmi, 0);
dw_hdmi_phy_enable_tmds(hdmi, 1);
/* gen2 tx power on */
dw_hdmi_phy_gen2_txpwron(hdmi, 1);
dw_hdmi_phy_gen2_pddq(hdmi, 0);
if (hdmi->dev_type == RK3288_HDMI)
dw_hdmi_phy_enable_spare(hdmi, 1);
/*Wait for PHY PLL lock */
msec = 5;
do {
val = hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_TX_PHY_LOCK;
if (!val)
break;
if (msec == 0) {
dev_err(hdmi->dev, "PHY PLL not locked\n");
return -ETIMEDOUT;
}
udelay(1000);
msec--;
} while (1);
return 0;
}
static int dw_hdmi_phy_init(struct dw_hdmi *hdmi)
{
int i, ret;
bool cscon;
/*check csc whether needed activated in HDMI mode */
cscon = hdmi->sink_is_hdmi && is_color_space_conversion(hdmi);
/* HDMI Phy spec says to do the phy initialization sequence twice */
for (i = 0; i < 2; i++) {
dw_hdmi_phy_sel_data_en_pol(hdmi, 1);
dw_hdmi_phy_sel_interface_control(hdmi, 0);
dw_hdmi_phy_enable_tmds(hdmi, 0);
dw_hdmi_phy_enable_powerdown(hdmi, true);
/* Enable CSC */
ret = hdmi_phy_configure(hdmi, 0, 8, cscon);
if (ret)
return ret;
}
hdmi->phy_enabled = true;
return 0;
}
static void hdmi_tx_hdcp_config(struct dw_hdmi *hdmi)
{
u8 de;
if (hdmi->hdmi_data.video_mode.mdataenablepolarity)
de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_HIGH;
else
de = HDMI_A_VIDPOLCFG_DATAENPOL_ACTIVE_LOW;
/* disable rx detect */
hdmi_modb(hdmi, HDMI_A_HDCPCFG0_RXDETECT_DISABLE,
HDMI_A_HDCPCFG0_RXDETECT_MASK, HDMI_A_HDCPCFG0);
hdmi_modb(hdmi, de, HDMI_A_VIDPOLCFG_DATAENPOL_MASK, HDMI_A_VIDPOLCFG);
hdmi_modb(hdmi, HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_DISABLE,
HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK, HDMI_A_HDCPCFG1);
}
static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
{
struct hdmi_avi_infoframe frame;
u8 val;
/* Initialise info frame from DRM mode */
drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
if (hdmi->hdmi_data.enc_out_format == YCBCR444)
frame.colorspace = HDMI_COLORSPACE_YUV444;
else if (hdmi->hdmi_data.enc_out_format == YCBCR422_8BITS)
frame.colorspace = HDMI_COLORSPACE_YUV422;
else
frame.colorspace = HDMI_COLORSPACE_RGB;
/* Set up colorimetry */
if (hdmi->hdmi_data.enc_out_format == XVYCC444) {
frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
if (hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_601)
frame.extended_colorimetry =
HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
else /*hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_709*/
frame.extended_colorimetry =
HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
} else if (hdmi->hdmi_data.enc_out_format != RGB) {
frame.colorimetry = hdmi->hdmi_data.colorimetry;
frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
} else { /* Carries no data */
frame.colorimetry = HDMI_COLORIMETRY_NONE;
frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
}
frame.scan_mode = HDMI_SCAN_MODE_NONE;
/*
* The Designware IP uses a different byte format from standard
* AVI info frames, though generally the bits are in the correct
* bytes.
*/
/*
* AVI data byte 1 differences: Colorspace in bits 0,1 rather than 5,6,
* scan info in bits 4,5 rather than 0,1 and active aspect present in
* bit 6 rather than 4.
*/
val = (frame.scan_mode & 3) << 4 | (frame.colorspace & 3);
if (frame.active_aspect & 15)
val |= HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT;
if (frame.top_bar || frame.bottom_bar)
val |= HDMI_FC_AVICONF0_BAR_DATA_HORIZ_BAR;
if (frame.left_bar || frame.right_bar)
val |= HDMI_FC_AVICONF0_BAR_DATA_VERT_BAR;
hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0);
/* AVI data byte 2 differences: none */
val = ((frame.colorimetry & 0x3) << 6) |
((frame.picture_aspect & 0x3) << 4) |
(frame.active_aspect & 0xf);
hdmi_writeb(hdmi, val, HDMI_FC_AVICONF1);
/* AVI data byte 3 differences: none */
val = ((frame.extended_colorimetry & 0x7) << 4) |
((frame.quantization_range & 0x3) << 2) |
(frame.nups & 0x3);
if (frame.itc)
val |= HDMI_FC_AVICONF2_IT_CONTENT_VALID;
hdmi_writeb(hdmi, val, HDMI_FC_AVICONF2);
/* AVI data byte 4 differences: none */
val = frame.video_code & 0x7f;
hdmi_writeb(hdmi, val, HDMI_FC_AVIVID);
/* AVI Data Byte 5- set up input and output pixel repetition */
val = (((hdmi->hdmi_data.video_mode.mpixelrepetitioninput + 1) <<
HDMI_FC_PRCONF_INCOMING_PR_FACTOR_OFFSET) &
HDMI_FC_PRCONF_INCOMING_PR_FACTOR_MASK) |
((hdmi->hdmi_data.video_mode.mpixelrepetitionoutput <<
HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_OFFSET) &
HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK);
hdmi_writeb(hdmi, val, HDMI_FC_PRCONF);
/*
* AVI data byte 5 differences: content type in 0,1 rather than 4,5,
* ycc range in bits 2,3 rather than 6,7
*/
val = ((frame.ycc_quantization_range & 0x3) << 2) |
(frame.content_type & 0x3);
hdmi_writeb(hdmi, val, HDMI_FC_AVICONF3);
/* AVI Data Bytes 6-13 */
hdmi_writeb(hdmi, frame.top_bar & 0xff, HDMI_FC_AVIETB0);
hdmi_writeb(hdmi, (frame.top_bar >> 8) & 0xff, HDMI_FC_AVIETB1);
hdmi_writeb(hdmi, frame.bottom_bar & 0xff, HDMI_FC_AVISBB0);
hdmi_writeb(hdmi, (frame.bottom_bar >> 8) & 0xff, HDMI_FC_AVISBB1);
hdmi_writeb(hdmi, frame.left_bar & 0xff, HDMI_FC_AVIELB0);
hdmi_writeb(hdmi, (frame.left_bar >> 8) & 0xff, HDMI_FC_AVIELB1);
hdmi_writeb(hdmi, frame.right_bar & 0xff, HDMI_FC_AVISRB0);
hdmi_writeb(hdmi, (frame.right_bar >> 8) & 0xff, HDMI_FC_AVISRB1);
}
static void hdmi_av_composer(struct dw_hdmi *hdmi,
const struct drm_display_mode *mode)
{
u8 inv_val;
struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode;
int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
unsigned int vdisplay;
vmode->mpixelclock = mode->clock * 1000;
dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
/* Set up HDMI_FC_INVIDCONF */
inv_val = (hdmi->hdmi_data.hdcp_enable ?
HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE :
HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE);
inv_val |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH :
HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW;
inv_val |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH :
HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW;
inv_val |= (vmode->mdataenablepolarity ?
HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH :
HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_LOW);
if (hdmi->vic == 39)
inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH;
else
inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH :
HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW;
inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
HDMI_FC_INVIDCONF_IN_I_P_INTERLACED :
HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE;
inv_val |= hdmi->sink_is_hdmi ?
HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE :
HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE;
hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF);
vdisplay = mode->vdisplay;
vblank = mode->vtotal - mode->vdisplay;
v_de_vs = mode->vsync_start - mode->vdisplay;
vsync_len = mode->vsync_end - mode->vsync_start;
/*
* When we're setting an interlaced mode, we need
* to adjust the vertical timing to suit.
*/
if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
vdisplay /= 2;
vblank /= 2;
v_de_vs /= 2;
vsync_len /= 2;
}
/* Set up horizontal active pixel width */
hdmi_writeb(hdmi, mode->hdisplay >> 8, HDMI_FC_INHACTV1);
hdmi_writeb(hdmi, mode->hdisplay, HDMI_FC_INHACTV0);
/* Set up vertical active lines */
hdmi_writeb(hdmi, vdisplay >> 8, HDMI_FC_INVACTV1);
hdmi_writeb(hdmi, vdisplay, HDMI_FC_INVACTV0);
/* Set up horizontal blanking pixel region width */
hblank = mode->htotal - mode->hdisplay;
hdmi_writeb(hdmi, hblank >> 8, HDMI_FC_INHBLANK1);
hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0);
/* Set up vertical blanking pixel region width */
hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK);
/* Set up HSYNC active edge delay width (in pixel clks) */
h_de_hs = mode->hsync_start - mode->hdisplay;
hdmi_writeb(hdmi, h_de_hs >> 8, HDMI_FC_HSYNCINDELAY1);
hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0);
/* Set up VSYNC active edge delay (in lines) */
hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY);
/* Set up HSYNC active pulse width (in pixel clks) */
hsync_len = mode->hsync_end - mode->hsync_start;
hdmi_writeb(hdmi, hsync_len >> 8, HDMI_FC_HSYNCINWIDTH1);
hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0);
/* Set up VSYNC active edge delay (in lines) */
hdmi_writeb(hdmi, vsync_len, HDMI_FC_VSYNCINWIDTH);
}
static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi)
{
if (!hdmi->phy_enabled)
return;
dw_hdmi_phy_enable_tmds(hdmi, 0);
dw_hdmi_phy_enable_powerdown(hdmi, true);
hdmi->phy_enabled = false;
}
/* HDMI Initialization Step B.4 */
static void dw_hdmi_enable_video_path(struct dw_hdmi *hdmi)
{
u8 clkdis;
/* control period minimum duration */
hdmi_writeb(hdmi, 12, HDMI_FC_CTRLDUR);
hdmi_writeb(hdmi, 32, HDMI_FC_EXCTRLDUR);
hdmi_writeb(hdmi, 1, HDMI_FC_EXCTRLSPAC);
/* Set to fill TMDS data channels */
hdmi_writeb(hdmi, 0x0B, HDMI_FC_CH0PREAM);
hdmi_writeb(hdmi, 0x16, HDMI_FC_CH1PREAM);
hdmi_writeb(hdmi, 0x21, HDMI_FC_CH2PREAM);
/* Enable pixel clock and tmds data path */
clkdis = 0x7F;
clkdis &= ~HDMI_MC_CLKDIS_PIXELCLK_DISABLE;
hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
clkdis &= ~HDMI_MC_CLKDIS_TMDSCLK_DISABLE;
hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
/* Enable csc path */
if (is_color_space_conversion(hdmi)) {
clkdis &= ~HDMI_MC_CLKDIS_CSCCLK_DISABLE;
hdmi_writeb(hdmi, clkdis, HDMI_MC_CLKDIS);
}
}
static void hdmi_enable_audio_clk(struct dw_hdmi *hdmi)
{
hdmi_modb(hdmi, 0, HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS);
}
/* Workaround to clear the overflow condition */
static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
{
int count;
u8 val;
/* TMDS software reset */
hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, HDMI_MC_SWRSTZ);
val = hdmi_readb(hdmi, HDMI_FC_INVIDCONF);
if (hdmi->dev_type == IMX6DL_HDMI) {
hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
return;
}
for (count = 0; count < 4; count++)
hdmi_writeb(hdmi, val, HDMI_FC_INVIDCONF);
}
static void hdmi_enable_overflow_interrupts(struct dw_hdmi *hdmi)
{
hdmi_writeb(hdmi, 0, HDMI_FC_MASK2);
hdmi_writeb(hdmi, 0, HDMI_IH_MUTE_FC_STAT2);
}
static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
{
hdmi_writeb(hdmi, HDMI_IH_MUTE_FC_STAT2_OVERFLOW_MASK,
HDMI_IH_MUTE_FC_STAT2);
}
static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
{
int ret;
hdmi_disable_overflow_interrupts(hdmi);
hdmi->vic = drm_match_cea_mode(mode);
if (!hdmi->vic) {
dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n");
} else {
dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
}
if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
(hdmi->vic == 21) || (hdmi->vic == 22) ||
(hdmi->vic == 2) || (hdmi->vic == 3) ||
(hdmi->vic == 17) || (hdmi->vic == 18))
hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_601;
else
hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
/* TODO: Get input format from IPU (via FB driver interface) */
hdmi->hdmi_data.enc_in_format = RGB;
hdmi->hdmi_data.enc_out_format = RGB;
hdmi->hdmi_data.enc_color_depth = 8;
hdmi->hdmi_data.pix_repet_factor = 0;
hdmi->hdmi_data.hdcp_enable = 0;
hdmi->hdmi_data.video_mode.mdataenablepolarity = true;
/* HDMI Initialization Step B.1 */
hdmi_av_composer(hdmi, mode);
/* HDMI Initializateion Step B.2 */
ret = dw_hdmi_phy_init(hdmi);
if (ret)
return ret;
/* HDMI Initialization Step B.3 */
dw_hdmi_enable_video_path(hdmi);
if (hdmi->sink_has_audio) {
dev_dbg(hdmi->dev, "sink has audio support\n");
/* HDMI Initialization Step E - Configure audio */
hdmi_clk_regenerator_update_pixel_clock(hdmi);
hdmi_enable_audio_clk(hdmi);
}
/* not for DVI mode */
if (hdmi->sink_is_hdmi) {
dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__);
/* HDMI Initialization Step F - Configure AVI InfoFrame */
hdmi_config_AVI(hdmi, mode);
} else {
dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
}
hdmi_video_packetize(hdmi);
hdmi_video_csc(hdmi);
hdmi_video_sample(hdmi);
hdmi_tx_hdcp_config(hdmi);
dw_hdmi_clear_overflow(hdmi);
if (hdmi->cable_plugin && hdmi->sink_is_hdmi)
hdmi_enable_overflow_interrupts(hdmi);
return 0;
}
/* Wait until we are registered to enable interrupts */
static int dw_hdmi_fb_registered(struct dw_hdmi *hdmi)
{
hdmi_writeb(hdmi, HDMI_PHY_I2CM_INT_ADDR_DONE_POL,
HDMI_PHY_I2CM_INT_ADDR);
hdmi_writeb(hdmi, HDMI_PHY_I2CM_CTLINT_ADDR_NAC_POL |
HDMI_PHY_I2CM_CTLINT_ADDR_ARBITRATION_POL,
HDMI_PHY_I2CM_CTLINT_ADDR);
/* enable cable hot plug irq */
hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
/* Clear Hotplug interrupts */
hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
HDMI_IH_PHY_STAT0);
return 0;
}
static void initialize_hdmi_ih_mutes(struct dw_hdmi *hdmi)
{
u8 ih_mute;
/*
* Boot up defaults are:
* HDMI_IH_MUTE = 0x03 (disabled)
* HDMI_IH_MUTE_* = 0x00 (enabled)
*
* Disable top level interrupt bits in HDMI block
*/
ih_mute = hdmi_readb(hdmi, HDMI_IH_MUTE) |
HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
HDMI_IH_MUTE_MUTE_ALL_INTERRUPT;
hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
/* by default mask all interrupts */
hdmi_writeb(hdmi, 0xff, HDMI_VP_MASK);
hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK0);
hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK1);
hdmi_writeb(hdmi, 0xff, HDMI_FC_MASK2);
hdmi_writeb(hdmi, 0xff, HDMI_PHY_MASK0);
hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_INT_ADDR);
hdmi_writeb(hdmi, 0xff, HDMI_PHY_I2CM_CTLINT_ADDR);
hdmi_writeb(hdmi, 0xff, HDMI_AUD_INT);
hdmi_writeb(hdmi, 0xff, HDMI_AUD_SPDIFINT);
hdmi_writeb(hdmi, 0xff, HDMI_AUD_HBR_MASK);
hdmi_writeb(hdmi, 0xff, HDMI_GP_MASK);
hdmi_writeb(hdmi, 0xff, HDMI_A_APIINTMSK);
hdmi_writeb(hdmi, 0xff, HDMI_CEC_MASK);
hdmi_writeb(hdmi, 0xff, HDMI_I2CM_INT);
hdmi_writeb(hdmi, 0xff, HDMI_I2CM_CTLINT);
/* Disable interrupts in the IH_MUTE_* registers */
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT0);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT1);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_FC_STAT2);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AS_STAT0);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_PHY_STAT0);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CM_STAT0);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_CEC_STAT0);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_VP_STAT0);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_I2CMPHY_STAT0);
hdmi_writeb(hdmi, 0xff, HDMI_IH_MUTE_AHBDMAAUD_STAT0);
/* Enable top level interrupt bits in HDMI block */
ih_mute &= ~(HDMI_IH_MUTE_MUTE_WAKEUP_INTERRUPT |
HDMI_IH_MUTE_MUTE_ALL_INTERRUPT);
hdmi_writeb(hdmi, ih_mute, HDMI_IH_MUTE);
}
static void dw_hdmi_poweron(struct dw_hdmi *hdmi)
{
hdmi->bridge_is_on = true;
dw_hdmi_setup(hdmi, &hdmi->previous_mode);
}
static void dw_hdmi_poweroff(struct dw_hdmi *hdmi)
{
dw_hdmi_phy_disable(hdmi);
hdmi->bridge_is_on = false;
}
static void dw_hdmi_update_power(struct dw_hdmi *hdmi)
{
int force = hdmi->force;
if (hdmi->disabled) {
force = DRM_FORCE_OFF;
} else if (force == DRM_FORCE_UNSPECIFIED) {
if (hdmi->rxsense)
force = DRM_FORCE_ON;
else
force = DRM_FORCE_OFF;
}
if (force == DRM_FORCE_OFF) {
if (hdmi->bridge_is_on)
dw_hdmi_poweroff(hdmi);
} else {
if (!hdmi->bridge_is_on)
dw_hdmi_poweron(hdmi);
}
}
/*
* Adjust the detection of RXSENSE according to whether we have a forced
* connection mode enabled, or whether we have been disabled. There is
* no point processing RXSENSE interrupts if we have a forced connection
* state, or DRM has us disabled.
*
* We also disable rxsense interrupts when we think we're disconnected
* to avoid floating TDMS signals giving false rxsense interrupts.
*
* Note: we still need to listen for HPD interrupts even when DRM has us
* disabled so that we can detect a connect event.
*/
static void dw_hdmi_update_phy_mask(struct dw_hdmi *hdmi)
{
u8 old_mask = hdmi->phy_mask;
if (hdmi->force || hdmi->disabled || !hdmi->rxsense)
hdmi->phy_mask |= HDMI_PHY_RX_SENSE;
else
hdmi->phy_mask &= ~HDMI_PHY_RX_SENSE;
if (old_mask != hdmi->phy_mask)
hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
}
static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
struct drm_display_mode *orig_mode,
struct drm_display_mode *mode)
{
struct dw_hdmi *hdmi = bridge->driver_private;
mutex_lock(&hdmi->mutex);
/* Store the display mode for plugin/DKMS poweron events */
memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode));
mutex_unlock(&hdmi->mutex);
}
static void dw_hdmi_bridge_disable(struct drm_bridge *bridge)
{
struct dw_hdmi *hdmi = bridge->driver_private;
mutex_lock(&hdmi->mutex);
hdmi->disabled = true;
dw_hdmi_update_power(hdmi);
dw_hdmi_update_phy_mask(hdmi);
mutex_unlock(&hdmi->mutex);
}
static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
{
struct dw_hdmi *hdmi = bridge->driver_private;
mutex_lock(&hdmi->mutex);
hdmi->disabled = false;
dw_hdmi_update_power(hdmi);
dw_hdmi_update_phy_mask(hdmi);
mutex_unlock(&hdmi->mutex);
}
static enum drm_connector_status
dw_hdmi_connector_detect(struct drm_connector *connector, bool force)
{
struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
connector);
mutex_lock(&hdmi->mutex);
hdmi->force = DRM_FORCE_UNSPECIFIED;
dw_hdmi_update_power(hdmi);
dw_hdmi_update_phy_mask(hdmi);
mutex_unlock(&hdmi->mutex);
return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
connector_status_connected : connector_status_disconnected;
}
static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
{
struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
connector);
struct edid *edid;
int ret = 0;
if (!hdmi->ddc)
return 0;
edid = drm_get_edid(connector, hdmi->ddc);
if (edid) {
dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
edid->width_cm, edid->height_cm);
hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
drm_mode_connector_update_edid_property(connector, edid);
ret = drm_add_edid_modes(connector, edid);
/* Store the ELD */
drm_edid_to_eld(connector, edid);
kfree(edid);
} else {
dev_dbg(hdmi->dev, "failed to get edid\n");
}
return ret;
}
static enum drm_mode_status
dw_hdmi_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct dw_hdmi *hdmi = container_of(connector,
struct dw_hdmi, connector);
enum drm_mode_status mode_status = MODE_OK;
/* We don't support double-clocked modes */
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
return MODE_BAD;
if (hdmi->plat_data->mode_valid)
mode_status = hdmi->plat_data->mode_valid(connector, mode);
return mode_status;
}
static void dw_hdmi_connector_force(struct drm_connector *connector)
{
struct dw_hdmi *hdmi = container_of(connector, struct dw_hdmi,
connector);
mutex_lock(&hdmi->mutex);
hdmi->force = connector->force;
dw_hdmi_update_power(hdmi);
dw_hdmi_update_phy_mask(hdmi);
mutex_unlock(&hdmi->mutex);
}
static const struct drm_connector_funcs dw_hdmi_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.fill_modes = drm_helper_probe_single_connector_modes,
.detect = dw_hdmi_connector_detect,
.destroy = drm_connector_cleanup,
.force = dw_hdmi_connector_force,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static const struct drm_connector_helper_funcs dw_hdmi_connector_helper_funcs = {
.get_modes = dw_hdmi_connector_get_modes,
.mode_valid = dw_hdmi_connector_mode_valid,
.best_encoder = drm_atomic_helper_best_encoder,
};
static const struct drm_bridge_funcs dw_hdmi_bridge_funcs = {
.enable = dw_hdmi_bridge_enable,
.disable = dw_hdmi_bridge_disable,
.mode_set = dw_hdmi_bridge_mode_set,
};
static irqreturn_t dw_hdmi_i2c_irq(struct dw_hdmi *hdmi)
{
struct dw_hdmi_i2c *i2c = hdmi->i2c;
unsigned int stat;
stat = hdmi_readb(hdmi, HDMI_IH_I2CM_STAT0);
if (!stat)
return IRQ_NONE;
hdmi_writeb(hdmi, stat, HDMI_IH_I2CM_STAT0);
i2c->stat = stat;
complete(&i2c->cmp);
return IRQ_HANDLED;
}
static irqreturn_t dw_hdmi_hardirq(int irq, void *dev_id)
{
struct dw_hdmi *hdmi = dev_id;
u8 intr_stat;
irqreturn_t ret = IRQ_NONE;
if (hdmi->i2c)
ret = dw_hdmi_i2c_irq(hdmi);
intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
if (intr_stat) {
hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
return IRQ_WAKE_THREAD;
}
return ret;
}
static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
{
struct dw_hdmi *hdmi = dev_id;
u8 intr_stat, phy_int_pol, phy_pol_mask, phy_stat;
intr_stat = hdmi_readb(hdmi, HDMI_IH_PHY_STAT0);
phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0);
phy_stat = hdmi_readb(hdmi, HDMI_PHY_STAT0);
phy_pol_mask = 0;
if (intr_stat & HDMI_IH_PHY_STAT0_HPD)
phy_pol_mask |= HDMI_PHY_HPD;
if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE0)
phy_pol_mask |= HDMI_PHY_RX_SENSE0;
if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE1)
phy_pol_mask |= HDMI_PHY_RX_SENSE1;
if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE2)
phy_pol_mask |= HDMI_PHY_RX_SENSE2;
if (intr_stat & HDMI_IH_PHY_STAT0_RX_SENSE3)
phy_pol_mask |= HDMI_PHY_RX_SENSE3;
if (phy_pol_mask)
hdmi_modb(hdmi, ~phy_int_pol, phy_pol_mask, HDMI_PHY_POL0);
/*
* RX sense tells us whether the TDMS transmitters are detecting
* load - in other words, there's something listening on the
* other end of the link. Use this to decide whether we should
* power on the phy as HPD may be toggled by the sink to merely
* ask the source to re-read the EDID.
*/
if (intr_stat &
(HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD)) {
mutex_lock(&hdmi->mutex);
if (!hdmi->disabled && !hdmi->force) {
/*
* If the RX sense status indicates we're disconnected,
* clear the software rxsense status.
*/
if (!(phy_stat & HDMI_PHY_RX_SENSE))
hdmi->rxsense = false;
/*
* Only set the software rxsense status when both
* rxsense and hpd indicates we're connected.
* This avoids what seems to be bad behaviour in
* at least iMX6S versions of the phy.
*/
if (phy_stat & HDMI_PHY_HPD)
hdmi->rxsense = true;
dw_hdmi_update_power(hdmi);
dw_hdmi_update_phy_mask(hdmi);
}
mutex_unlock(&hdmi->mutex);
}
if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
dev_dbg(hdmi->dev, "EVENT=%s\n",
phy_int_pol & HDMI_PHY_HPD ? "plugin" : "plugout");
drm_helper_hpd_irq_event(hdmi->bridge->dev);
}
hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);
hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
HDMI_IH_MUTE_PHY_STAT0);
return IRQ_HANDLED;
}
static int dw_hdmi_register(struct drm_device *drm, struct dw_hdmi *hdmi)
{
struct drm_encoder *encoder = hdmi->encoder;
struct drm_bridge *bridge;
int ret;
bridge = devm_kzalloc(drm->dev, sizeof(*bridge), GFP_KERNEL);
if (!bridge) {
DRM_ERROR("Failed to allocate drm bridge\n");
return -ENOMEM;
}
hdmi->bridge = bridge;
bridge->driver_private = hdmi;
bridge->funcs = &dw_hdmi_bridge_funcs;
ret = drm_bridge_attach(encoder, bridge, NULL);
if (ret) {
DRM_ERROR("Failed to initialize bridge with drm\n");
return -EINVAL;
}
hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
drm_connector_helper_add(&hdmi->connector,
&dw_hdmi_connector_helper_funcs);
drm_connector_init(drm, &hdmi->connector,
&dw_hdmi_connector_funcs,
DRM_MODE_CONNECTOR_HDMIA);
drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
return 0;
}
int dw_hdmi_bind(struct device *dev, struct device *master,
void *data, struct drm_encoder *encoder,
struct resource *iores, int irq,
const struct dw_hdmi_plat_data *plat_data)
{
struct drm_device *drm = data;
struct device_node *np = dev->of_node;
struct platform_device_info pdevinfo;
struct device_node *ddc_node;
struct dw_hdmi *hdmi;
int ret;
u32 val = 1;
u8 config0;
u8 config1;
hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
if (!hdmi)
return -ENOMEM;
hdmi->connector.interlace_allowed = 1;
hdmi->plat_data = plat_data;
hdmi->dev = dev;
hdmi->dev_type = plat_data->dev_type;
hdmi->sample_rate = 48000;
hdmi->encoder = encoder;
hdmi->disabled = true;
hdmi->rxsense = true;
hdmi->phy_mask = (u8)~(HDMI_PHY_HPD | HDMI_PHY_RX_SENSE);
mutex_init(&hdmi->mutex);
mutex_init(&hdmi->audio_mutex);
spin_lock_init(&hdmi->audio_lock);
of_property_read_u32(np, "reg-io-width", &val);
switch (val) {
case 4:
hdmi->write = dw_hdmi_writel;
hdmi->read = dw_hdmi_readl;
break;
case 1:
hdmi->write = dw_hdmi_writeb;
hdmi->read = dw_hdmi_readb;
break;
default:
dev_err(dev, "reg-io-width must be 1 or 4\n");
return -EINVAL;
}
ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
if (ddc_node) {
hdmi->ddc = of_get_i2c_adapter_by_node(ddc_node);
of_node_put(ddc_node);
if (!hdmi->ddc) {
dev_dbg(hdmi->dev, "failed to read ddc node\n");
return -EPROBE_DEFER;
}
} else {
dev_dbg(hdmi->dev, "no ddc property found\n");
}
hdmi->regs = devm_ioremap_resource(dev, iores);
if (IS_ERR(hdmi->regs)) {
ret = PTR_ERR(hdmi->regs);
goto err_res;
}
hdmi->isfr_clk = devm_clk_get(hdmi->dev, "isfr");
if (IS_ERR(hdmi->isfr_clk)) {
ret = PTR_ERR(hdmi->isfr_clk);
dev_err(hdmi->dev, "Unable to get HDMI isfr clk: %d\n", ret);
goto err_res;
}
ret = clk_prepare_enable(hdmi->isfr_clk);
if (ret) {
dev_err(hdmi->dev, "Cannot enable HDMI isfr clock: %d\n", ret);
goto err_res;
}
hdmi->iahb_clk = devm_clk_get(hdmi->dev, "iahb");
if (IS_ERR(hdmi->iahb_clk)) {
ret = PTR_ERR(hdmi->iahb_clk);
dev_err(hdmi->dev, "Unable to get HDMI iahb clk: %d\n", ret);
goto err_isfr;
}
ret = clk_prepare_enable(hdmi->iahb_clk);
if (ret) {
dev_err(hdmi->dev, "Cannot enable HDMI iahb clock: %d\n", ret);
goto err_isfr;
}
/* Product and revision IDs */
dev_info(dev,
"Detected HDMI controller 0x%x:0x%x:0x%x:0x%x\n",
hdmi_readb(hdmi, HDMI_DESIGN_ID),
hdmi_readb(hdmi, HDMI_REVISION_ID),
hdmi_readb(hdmi, HDMI_PRODUCT_ID0),
hdmi_readb(hdmi, HDMI_PRODUCT_ID1));
initialize_hdmi_ih_mutes(hdmi);
ret = devm_request_threaded_irq(dev, irq, dw_hdmi_hardirq,
dw_hdmi_irq, IRQF_SHARED,
dev_name(dev), hdmi);
if (ret)
goto err_iahb;
/*
* To prevent overflows in HDMI_IH_FC_STAT2, set the clk regenerator
* N and cts values before enabling phy
*/
hdmi_init_clk_regenerator(hdmi);
/* If DDC bus is not specified, try to register HDMI I2C bus */
if (!hdmi->ddc) {
hdmi->ddc = dw_hdmi_i2c_adapter(hdmi);
if (IS_ERR(hdmi->ddc))
hdmi->ddc = NULL;
}
/*
* Configure registers related to HDMI interrupt
* generation before registering IRQ.
*/
hdmi_writeb(hdmi, HDMI_PHY_HPD | HDMI_PHY_RX_SENSE, HDMI_PHY_POL0);
/* Clear Hotplug interrupts */
hdmi_writeb(hdmi, HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE,
HDMI_IH_PHY_STAT0);
ret = dw_hdmi_fb_registered(hdmi);
if (ret)
goto err_iahb;
ret = dw_hdmi_register(drm, hdmi);
if (ret)
goto err_iahb;
/* Unmute interrupts */
hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
HDMI_IH_MUTE_PHY_STAT0);
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.parent = dev;
pdevinfo.id = PLATFORM_DEVID_AUTO;
config0 = hdmi_readb(hdmi, HDMI_CONFIG0_ID);
config1 = hdmi_readb(hdmi, HDMI_CONFIG1_ID);
if (config1 & HDMI_CONFIG1_AHB) {
struct dw_hdmi_audio_data audio;
audio.phys = iores->start;
audio.base = hdmi->regs;
audio.irq = irq;
audio.hdmi = hdmi;
audio.eld = hdmi->connector.eld;
pdevinfo.name = "dw-hdmi-ahb-audio";
pdevinfo.data = &audio;
pdevinfo.size_data = sizeof(audio);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
hdmi->audio = platform_device_register_full(&pdevinfo);
} else if (config0 & HDMI_CONFIG0_I2S) {
struct dw_hdmi_i2s_audio_data audio;
audio.hdmi = hdmi;
audio.write = hdmi_writeb;
audio.read = hdmi_readb;
pdevinfo.name = "dw-hdmi-i2s-audio";
pdevinfo.data = &audio;
pdevinfo.size_data = sizeof(audio);
pdevinfo.dma_mask = DMA_BIT_MASK(32);
hdmi->audio = platform_device_register_full(&pdevinfo);
}
/* Reset HDMI DDC I2C master controller and mute I2CM interrupts */
if (hdmi->i2c)
dw_hdmi_i2c_init(hdmi);
dev_set_drvdata(dev, hdmi);
return 0;
err_iahb:
if (hdmi->i2c) {
i2c_del_adapter(&hdmi->i2c->adap);
hdmi->ddc = NULL;
}
clk_disable_unprepare(hdmi->iahb_clk);
err_isfr:
clk_disable_unprepare(hdmi->isfr_clk);
err_res:
i2c_put_adapter(hdmi->ddc);
return ret;
}
EXPORT_SYMBOL_GPL(dw_hdmi_bind);
void dw_hdmi_unbind(struct device *dev, struct device *master, void *data)
{
struct dw_hdmi *hdmi = dev_get_drvdata(dev);
if (hdmi->audio && !IS_ERR(hdmi->audio))
platform_device_unregister(hdmi->audio);
/* Disable all interrupts */
hdmi_writeb(hdmi, ~0, HDMI_IH_MUTE_PHY_STAT0);
clk_disable_unprepare(hdmi->iahb_clk);
clk_disable_unprepare(hdmi->isfr_clk);
if (hdmi->i2c)
i2c_del_adapter(&hdmi->i2c->adap);
else
i2c_put_adapter(hdmi->ddc);
}
EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>");
MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>");
MODULE_AUTHOR("Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>");
MODULE_DESCRIPTION("DW HDMI transmitter driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:dw-hdmi");
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