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linux/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
Jernej Skrabec 4f86e81748
drm/sun4i: Add support for H3 HDMI PHY variant 
While A83T HDMI PHY seems to be just customized Synopsys HDMI PHY, H3
HDMI PHY is completely custom PHY.

However, they still have many things in common like clock and reset
setup, setting sync polarity and more.

Add support for H3 HDMI PHY variant.

While documentation exists for this PHY variant, it doesn't go in great
details. Because of that, almost all settings are copied from BSP linux
4.4. Interestingly, those settings are slightly different to those found
in a older BSP with Linux 3.4. For now, no user visible difference was
found between them.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180301213442.16677-13-jernej.skrabec@siol.net
2018-03-02 08:45:49 +01:00

544 lines
17 KiB
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
*/
#include <linux/delay.h>
#include <linux/of_address.h>
#include "sun8i_dw_hdmi.h"
/*
* Address can be actually any value. Here is set to same value as
* it is set in BSP driver.
*/
#define I2C_ADDR 0x69
static int sun8i_hdmi_phy_config_a83t(struct dw_hdmi *hdmi,
struct sun8i_hdmi_phy *phy,
unsigned int clk_rate)
{
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN,
SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN);
/* power down */
dw_hdmi_phy_gen2_txpwron(hdmi, 0);
dw_hdmi_phy_gen2_pddq(hdmi, 1);
dw_hdmi_phy_reset(hdmi);
dw_hdmi_phy_gen2_pddq(hdmi, 0);
dw_hdmi_phy_i2c_set_addr(hdmi, I2C_ADDR);
/*
* Values are taken from BSP HDMI driver. Although AW didn't
* release any documentation, explanation of this values can
* be found in i.MX 6Dual/6Quad Reference Manual.
*/
if (clk_rate <= 27000000) {
dw_hdmi_phy_i2c_write(hdmi, 0x01e0, 0x06);
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x15);
dw_hdmi_phy_i2c_write(hdmi, 0x08da, 0x10);
dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
dw_hdmi_phy_i2c_write(hdmi, 0x0318, 0x0e);
dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
} else if (clk_rate <= 74250000) {
dw_hdmi_phy_i2c_write(hdmi, 0x0540, 0x06);
dw_hdmi_phy_i2c_write(hdmi, 0x0005, 0x15);
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
dw_hdmi_phy_i2c_write(hdmi, 0x02b5, 0x0e);
dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
} else if (clk_rate <= 148500000) {
dw_hdmi_phy_i2c_write(hdmi, 0x04a0, 0x06);
dw_hdmi_phy_i2c_write(hdmi, 0x000a, 0x15);
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
dw_hdmi_phy_i2c_write(hdmi, 0x0021, 0x0e);
dw_hdmi_phy_i2c_write(hdmi, 0x8029, 0x09);
} else {
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x06);
dw_hdmi_phy_i2c_write(hdmi, 0x000f, 0x15);
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x0e);
dw_hdmi_phy_i2c_write(hdmi, 0x802b, 0x09);
}
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x1e);
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x13);
dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x17);
dw_hdmi_phy_gen2_txpwron(hdmi, 1);
return 0;
}
static int sun8i_hdmi_phy_config_h3(struct dw_hdmi *hdmi,
struct sun8i_hdmi_phy *phy,
unsigned int clk_rate)
{
u32 pll_cfg1_init;
u32 pll_cfg2_init;
u32 ana_cfg1_end;
u32 ana_cfg2_init;
u32 ana_cfg3_init;
u32 b_offset = 0;
u32 val;
/* bandwidth / frequency independent settings */
pll_cfg1_init = SUN8I_HDMI_PHY_PLL_CFG1_LDO2_EN |
SUN8I_HDMI_PHY_PLL_CFG1_LDO1_EN |
SUN8I_HDMI_PHY_PLL_CFG1_LDO_VSET(7) |
SUN8I_HDMI_PHY_PLL_CFG1_UNKNOWN(1) |
SUN8I_HDMI_PHY_PLL_CFG1_PLLDBEN |
SUN8I_HDMI_PHY_PLL_CFG1_CS |
SUN8I_HDMI_PHY_PLL_CFG1_CP_S(2) |
SUN8I_HDMI_PHY_PLL_CFG1_CNT_INT(63) |
SUN8I_HDMI_PHY_PLL_CFG1_BWS;
pll_cfg2_init = SUN8I_HDMI_PHY_PLL_CFG2_SV_H |
SUN8I_HDMI_PHY_PLL_CFG2_VCOGAIN_EN |
SUN8I_HDMI_PHY_PLL_CFG2_SDIV2;
ana_cfg1_end = SUN8I_HDMI_PHY_ANA_CFG1_REG_SVBH(1) |
SUN8I_HDMI_PHY_ANA_CFG1_AMP_OPT |
SUN8I_HDMI_PHY_ANA_CFG1_EMP_OPT |
SUN8I_HDMI_PHY_ANA_CFG1_AMPCK_OPT |
SUN8I_HDMI_PHY_ANA_CFG1_EMPCK_OPT |
SUN8I_HDMI_PHY_ANA_CFG1_ENRCAL |
SUN8I_HDMI_PHY_ANA_CFG1_ENCALOG |
SUN8I_HDMI_PHY_ANA_CFG1_REG_SCKTMDS |
SUN8I_HDMI_PHY_ANA_CFG1_TMDSCLK_EN |
SUN8I_HDMI_PHY_ANA_CFG1_TXEN_MASK |
SUN8I_HDMI_PHY_ANA_CFG1_TXEN_ALL |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDSCLK |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS2 |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS1 |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS0 |
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS2 |
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS1 |
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS0 |
SUN8I_HDMI_PHY_ANA_CFG1_CKEN |
SUN8I_HDMI_PHY_ANA_CFG1_LDOEN |
SUN8I_HDMI_PHY_ANA_CFG1_ENVBS |
SUN8I_HDMI_PHY_ANA_CFG1_ENBI;
ana_cfg2_init = SUN8I_HDMI_PHY_ANA_CFG2_M_EN |
SUN8I_HDMI_PHY_ANA_CFG2_REG_DENCK |
SUN8I_HDMI_PHY_ANA_CFG2_REG_DEN |
SUN8I_HDMI_PHY_ANA_CFG2_REG_CKSS(1) |
SUN8I_HDMI_PHY_ANA_CFG2_REG_CSMPS(1);
ana_cfg3_init = SUN8I_HDMI_PHY_ANA_CFG3_REG_WIRE(0x3e0) |
SUN8I_HDMI_PHY_ANA_CFG3_SDAEN |
SUN8I_HDMI_PHY_ANA_CFG3_SCLEN;
/* bandwidth / frequency dependent settings */
if (clk_rate <= 27000000) {
pll_cfg1_init |= SUN8I_HDMI_PHY_PLL_CFG1_HV_IS_33 |
SUN8I_HDMI_PHY_PLL_CFG1_CNT_INT(32);
pll_cfg2_init |= SUN8I_HDMI_PHY_PLL_CFG2_VCO_S(4) |
SUN8I_HDMI_PHY_PLL_CFG2_S(4);
ana_cfg1_end |= SUN8I_HDMI_PHY_ANA_CFG1_REG_CALSW;
ana_cfg2_init |= SUN8I_HDMI_PHY_ANA_CFG2_REG_SLV(4) |
SUN8I_HDMI_PHY_ANA_CFG2_REG_RESDI(phy->rcal);
ana_cfg3_init |= SUN8I_HDMI_PHY_ANA_CFG3_REG_AMPCK(3) |
SUN8I_HDMI_PHY_ANA_CFG3_REG_AMP(5);
} else if (clk_rate <= 74250000) {
pll_cfg1_init |= SUN8I_HDMI_PHY_PLL_CFG1_HV_IS_33 |
SUN8I_HDMI_PHY_PLL_CFG1_CNT_INT(32);
pll_cfg2_init |= SUN8I_HDMI_PHY_PLL_CFG2_VCO_S(4) |
SUN8I_HDMI_PHY_PLL_CFG2_S(5);
ana_cfg1_end |= SUN8I_HDMI_PHY_ANA_CFG1_REG_CALSW;
ana_cfg2_init |= SUN8I_HDMI_PHY_ANA_CFG2_REG_SLV(4) |
SUN8I_HDMI_PHY_ANA_CFG2_REG_RESDI(phy->rcal);
ana_cfg3_init |= SUN8I_HDMI_PHY_ANA_CFG3_REG_AMPCK(5) |
SUN8I_HDMI_PHY_ANA_CFG3_REG_AMP(7);
} else if (clk_rate <= 148500000) {
pll_cfg1_init |= SUN8I_HDMI_PHY_PLL_CFG1_HV_IS_33 |
SUN8I_HDMI_PHY_PLL_CFG1_CNT_INT(32);
pll_cfg2_init |= SUN8I_HDMI_PHY_PLL_CFG2_VCO_S(4) |
SUN8I_HDMI_PHY_PLL_CFG2_S(6);
ana_cfg2_init |= SUN8I_HDMI_PHY_ANA_CFG2_REG_BIGSWCK |
SUN8I_HDMI_PHY_ANA_CFG2_REG_BIGSW |
SUN8I_HDMI_PHY_ANA_CFG2_REG_SLV(2);
ana_cfg3_init |= SUN8I_HDMI_PHY_ANA_CFG3_REG_AMPCK(7) |
SUN8I_HDMI_PHY_ANA_CFG3_REG_AMP(9);
} else {
b_offset = 2;
pll_cfg1_init |= SUN8I_HDMI_PHY_PLL_CFG1_CNT_INT(63);
pll_cfg2_init |= SUN8I_HDMI_PHY_PLL_CFG2_VCO_S(6) |
SUN8I_HDMI_PHY_PLL_CFG2_S(7);
ana_cfg2_init |= SUN8I_HDMI_PHY_ANA_CFG2_REG_BIGSWCK |
SUN8I_HDMI_PHY_ANA_CFG2_REG_BIGSW |
SUN8I_HDMI_PHY_ANA_CFG2_REG_SLV(4);
ana_cfg3_init |= SUN8I_HDMI_PHY_ANA_CFG3_REG_AMPCK(9) |
SUN8I_HDMI_PHY_ANA_CFG3_REG_AMP(13);
}
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_TXEN_MASK, 0);
regmap_write(phy->regs, SUN8I_HDMI_PHY_PLL_CFG1_REG, pll_cfg1_init);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_PLL_CFG2_REG,
(u32)~SUN8I_HDMI_PHY_PLL_CFG2_PREDIV_MSK,
pll_cfg2_init);
usleep_range(10000, 15000);
regmap_write(phy->regs, SUN8I_HDMI_PHY_PLL_CFG3_REG,
SUN8I_HDMI_PHY_PLL_CFG3_SOUT_DIV2);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_PLL_CFG1_REG,
SUN8I_HDMI_PHY_PLL_CFG1_PLLEN,
SUN8I_HDMI_PHY_PLL_CFG1_PLLEN);
msleep(100);
/* get B value */
regmap_read(phy->regs, SUN8I_HDMI_PHY_ANA_STS_REG, &val);
val = (val & SUN8I_HDMI_PHY_ANA_STS_B_OUT_MSK) >>
SUN8I_HDMI_PHY_ANA_STS_B_OUT_SHIFT;
val = min(val + b_offset, (u32)0x3f);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_PLL_CFG1_REG,
SUN8I_HDMI_PHY_PLL_CFG1_REG_OD1 |
SUN8I_HDMI_PHY_PLL_CFG1_REG_OD,
SUN8I_HDMI_PHY_PLL_CFG1_REG_OD1 |
SUN8I_HDMI_PHY_PLL_CFG1_REG_OD);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_PLL_CFG1_REG,
SUN8I_HDMI_PHY_PLL_CFG1_B_IN_MSK,
val << SUN8I_HDMI_PHY_PLL_CFG1_B_IN_SHIFT);
msleep(100);
regmap_write(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG, ana_cfg1_end);
regmap_write(phy->regs, SUN8I_HDMI_PHY_ANA_CFG2_REG, ana_cfg2_init);
regmap_write(phy->regs, SUN8I_HDMI_PHY_ANA_CFG3_REG, ana_cfg3_init);
return 0;
}
static int sun8i_hdmi_phy_config(struct dw_hdmi *hdmi, void *data,
struct drm_display_mode *mode)
{
struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
u32 val = 0;
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
val |= SUN8I_HDMI_PHY_DBG_CTRL_POL_NHSYNC;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
val |= SUN8I_HDMI_PHY_DBG_CTRL_POL_NVSYNC;
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK, val);
if (phy->variant->has_phy_clk)
clk_set_rate(phy->clk_phy, mode->crtc_clock * 1000);
return phy->variant->phy_config(hdmi, phy, mode->crtc_clock * 1000);
};
static void sun8i_hdmi_phy_disable_a83t(struct dw_hdmi *hdmi,
struct sun8i_hdmi_phy *phy)
{
dw_hdmi_phy_gen2_txpwron(hdmi, 0);
dw_hdmi_phy_gen2_pddq(hdmi, 1);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN, 0);
}
static void sun8i_hdmi_phy_disable_h3(struct dw_hdmi *hdmi,
struct sun8i_hdmi_phy *phy)
{
regmap_write(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_LDOEN |
SUN8I_HDMI_PHY_ANA_CFG1_ENVBS |
SUN8I_HDMI_PHY_ANA_CFG1_ENBI);
regmap_write(phy->regs, SUN8I_HDMI_PHY_PLL_CFG1_REG, 0);
}
static void sun8i_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
{
struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
phy->variant->phy_disable(hdmi, phy);
}
static const struct dw_hdmi_phy_ops sun8i_hdmi_phy_ops = {
.init = &sun8i_hdmi_phy_config,
.disable = &sun8i_hdmi_phy_disable,
.read_hpd = &dw_hdmi_phy_read_hpd,
.update_hpd = &dw_hdmi_phy_update_hpd,
.setup_hpd = &dw_hdmi_phy_setup_hpd,
};
static void sun8i_hdmi_phy_init_a83t(struct sun8i_hdmi_phy *phy)
{
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK,
SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK);
/*
* Set PHY I2C address. It must match to the address set by
* dw_hdmi_phy_set_slave_addr().
*/
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK,
SUN8I_HDMI_PHY_DBG_CTRL_ADDR(I2C_ADDR));
}
static void sun8i_hdmi_phy_init_h3(struct sun8i_hdmi_phy *phy)
{
unsigned int val;
regmap_write(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG, 0);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_ENBI,
SUN8I_HDMI_PHY_ANA_CFG1_ENBI);
udelay(5);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_TMDSCLK_EN,
SUN8I_HDMI_PHY_ANA_CFG1_TMDSCLK_EN);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_ENVBS,
SUN8I_HDMI_PHY_ANA_CFG1_ENVBS);
usleep_range(10, 20);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_LDOEN,
SUN8I_HDMI_PHY_ANA_CFG1_LDOEN);
udelay(5);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_CKEN,
SUN8I_HDMI_PHY_ANA_CFG1_CKEN);
usleep_range(40, 100);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_ENRCAL,
SUN8I_HDMI_PHY_ANA_CFG1_ENRCAL);
usleep_range(100, 200);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_ENCALOG,
SUN8I_HDMI_PHY_ANA_CFG1_ENCALOG);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS0 |
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS1 |
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS2,
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS0 |
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS1 |
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDS2);
/* wait for calibration to finish */
regmap_read_poll_timeout(phy->regs, SUN8I_HDMI_PHY_ANA_STS_REG, val,
(val & SUN8I_HDMI_PHY_ANA_STS_RCALEND2D),
100, 2000);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDSCLK,
SUN8I_HDMI_PHY_ANA_CFG1_ENP2S_TMDSCLK);
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG1_REG,
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS0 |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS1 |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS2 |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDSCLK,
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS0 |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS1 |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDS2 |
SUN8I_HDMI_PHY_ANA_CFG1_BIASEN_TMDSCLK);
/* enable DDC communication */
regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_ANA_CFG3_REG,
SUN8I_HDMI_PHY_ANA_CFG3_SCLEN |
SUN8I_HDMI_PHY_ANA_CFG3_SDAEN,
SUN8I_HDMI_PHY_ANA_CFG3_SCLEN |
SUN8I_HDMI_PHY_ANA_CFG3_SDAEN);
/* set HW control of CEC pins */
regmap_write(phy->regs, SUN8I_HDMI_PHY_CEC_REG, 0);
/* read calibration data */
regmap_read(phy->regs, SUN8I_HDMI_PHY_ANA_STS_REG, &val);
phy->rcal = (val & SUN8I_HDMI_PHY_ANA_STS_RCAL_MASK) >> 2;
}
void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy)
{
/* enable read access to HDMI controller */
regmap_write(phy->regs, SUN8I_HDMI_PHY_READ_EN_REG,
SUN8I_HDMI_PHY_READ_EN_MAGIC);
/* unscramble register offsets */
regmap_write(phy->regs, SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC);
phy->variant->phy_init(phy);
}
const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void)
{
return &sun8i_hdmi_phy_ops;
}
static struct regmap_config sun8i_hdmi_phy_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = SUN8I_HDMI_PHY_CEC_REG,
.name = "phy"
};
static const struct sun8i_hdmi_phy_variant sun8i_a83t_hdmi_phy = {
.phy_init = &sun8i_hdmi_phy_init_a83t,
.phy_disable = &sun8i_hdmi_phy_disable_a83t,
.phy_config = &sun8i_hdmi_phy_config_a83t,
};
static const struct sun8i_hdmi_phy_variant sun8i_h3_hdmi_phy = {
.has_phy_clk = true,
.phy_init = &sun8i_hdmi_phy_init_h3,
.phy_disable = &sun8i_hdmi_phy_disable_h3,
.phy_config = &sun8i_hdmi_phy_config_h3,
};
static const struct of_device_id sun8i_hdmi_phy_of_table[] = {
{
.compatible = "allwinner,sun8i-a83t-hdmi-phy",
.data = &sun8i_a83t_hdmi_phy,
},
{
.compatible = "allwinner,sun8i-h3-hdmi-phy",
.data = &sun8i_h3_hdmi_phy,
},
{ /* sentinel */ }
};
int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node)
{
const struct of_device_id *match;
struct device *dev = hdmi->dev;
struct sun8i_hdmi_phy *phy;
struct resource res;
void __iomem *regs;
int ret;
match = of_match_node(sun8i_hdmi_phy_of_table, node);
if (!match) {
dev_err(dev, "Incompatible HDMI PHY\n");
return -EINVAL;
}
phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
if (!phy)
return -ENOMEM;
phy->variant = (struct sun8i_hdmi_phy_variant *)match->data;
ret = of_address_to_resource(node, 0, &res);
if (ret) {
dev_err(dev, "phy: Couldn't get our resources\n");
return ret;
}
regs = devm_ioremap_resource(dev, &res);
if (IS_ERR(regs)) {
dev_err(dev, "Couldn't map the HDMI PHY registers\n");
return PTR_ERR(regs);
}
phy->regs = devm_regmap_init_mmio(dev, regs,
&sun8i_hdmi_phy_regmap_config);
if (IS_ERR(phy->regs)) {
dev_err(dev, "Couldn't create the HDMI PHY regmap\n");
return PTR_ERR(phy->regs);
}
phy->clk_bus = of_clk_get_by_name(node, "bus");
if (IS_ERR(phy->clk_bus)) {
dev_err(dev, "Could not get bus clock\n");
return PTR_ERR(phy->clk_bus);
}
phy->clk_mod = of_clk_get_by_name(node, "mod");
if (IS_ERR(phy->clk_mod)) {
dev_err(dev, "Could not get mod clock\n");
ret = PTR_ERR(phy->clk_mod);
goto err_put_clk_bus;
}
if (phy->variant->has_phy_clk) {
phy->clk_pll0 = of_clk_get_by_name(node, "pll-0");
if (IS_ERR(phy->clk_pll0)) {
dev_err(dev, "Could not get pll-0 clock\n");
ret = PTR_ERR(phy->clk_pll0);
goto err_put_clk_mod;
}
ret = sun8i_phy_clk_create(phy, dev);
if (ret) {
dev_err(dev, "Couldn't create the PHY clock\n");
goto err_put_clk_pll0;
}
}
phy->rst_phy = of_reset_control_get_shared(node, "phy");
if (IS_ERR(phy->rst_phy)) {
dev_err(dev, "Could not get phy reset control\n");
ret = PTR_ERR(phy->rst_phy);
goto err_put_clk_pll0;
}
ret = reset_control_deassert(phy->rst_phy);
if (ret) {
dev_err(dev, "Cannot deassert phy reset control: %d\n", ret);
goto err_put_rst_phy;
}
ret = clk_prepare_enable(phy->clk_bus);
if (ret) {
dev_err(dev, "Cannot enable bus clock: %d\n", ret);
goto err_deassert_rst_phy;
}
ret = clk_prepare_enable(phy->clk_mod);
if (ret) {
dev_err(dev, "Cannot enable mod clock: %d\n", ret);
goto err_disable_clk_bus;
}
hdmi->phy = phy;
return 0;
err_disable_clk_bus:
clk_disable_unprepare(phy->clk_bus);
err_deassert_rst_phy:
reset_control_assert(phy->rst_phy);
err_put_rst_phy:
reset_control_put(phy->rst_phy);
err_put_clk_pll0:
if (phy->variant->has_phy_clk)
clk_put(phy->clk_pll0);
err_put_clk_mod:
clk_put(phy->clk_mod);
err_put_clk_bus:
clk_put(phy->clk_bus);
return ret;
}
void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi)
{
struct sun8i_hdmi_phy *phy = hdmi->phy;
clk_disable_unprepare(phy->clk_mod);
clk_disable_unprepare(phy->clk_bus);
reset_control_assert(phy->rst_phy);
reset_control_put(phy->rst_phy);
if (phy->variant->has_phy_clk)
clk_put(phy->clk_pll0);
clk_put(phy->clk_mod);
clk_put(phy->clk_bus);
}
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