[PATCH v2 02/15] phy: qualcomm: add QMP HDMI PHY driver
Konrad Dybcio
konrad.dybcio at linaro.org
Mon Jun 26 05:06:38 PDT 2023
On 25.06.2023 13:42, Dmitry Baryshkov wrote:
> Port Qualcomm QMP HDMI PHY to the generic PHY framework. Split the
> generic part and the msm8996 part. When adding support for msm8992/4 and
> msm8998 (which also employ QMP for HDMI PHY), one will have to provide
> the PLL programming part only.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> ---
[...]
> --- /dev/null
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-hdmi-base.c
> @@ -0,0 +1,184 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2016, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2023, Linaro Ltd.
> + */
> +
> +#include <linux/of_device.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +
> +#include "phy-qcom-qmp-hdmi.h"
> +
> +int qmp_hdmi_phy_init(struct phy *phy)
> +{
> + struct qmp_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
> +
> + return pm_runtime_resume_and_get(hdmi_phy->dev);
> +}
> +
> +int qmp_hdmi_phy_configure(struct phy *phy, union phy_configure_opts *opts)
> +{
> + const struct phy_configure_opts_hdmi *hdmi_opts = &opts->hdmi;
> + struct qmp_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
Misaligned
> + int ret = 0;
> +
> + memcpy(&hdmi_phy->hdmi_opts, hdmi_opts, sizeof(*hdmi_opts));
> +
> + return ret;
> +}
> +
> +int qmp_hdmi_phy_exit(struct phy *phy)
> +{
> + struct qmp_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
> +
> + pm_runtime_put_noidle(hdmi_phy->dev);
> +
> + return 0;
> +}
> +
> +static int __maybe_unused qmp_hdmi_runtime_resume(struct device *dev)
> +{
> + struct qmp_hdmi_phy *hdmi_phy = dev_get_drvdata(dev);
> + int ret;
> +
> + ret = regulator_bulk_enable(ARRAY_SIZE(hdmi_phy->supplies), hdmi_phy->supplies);
> + if (ret)
> + return ret;
> +
> + ret = clk_bulk_prepare_enable(ARRAY_SIZE(hdmi_phy->clks), hdmi_phy->clks);
> + if (ret)
> + goto out_disable_supplies;
> +
> + return 0;
> +
> +out_disable_supplies:
> + regulator_bulk_disable(ARRAY_SIZE(hdmi_phy->supplies), hdmi_phy->supplies);
> +
> + return ret;
> +}
> +
> +static int __maybe_unused qmp_hdmi_runtime_suspend(struct device *dev)
> +{
> + struct qmp_hdmi_phy *hdmi_phy = dev_get_drvdata(dev);
> +
> + clk_bulk_disable_unprepare(ARRAY_SIZE(hdmi_phy->clks), hdmi_phy->clks);
> + regulator_bulk_disable(ARRAY_SIZE(hdmi_phy->supplies), hdmi_phy->supplies);
> +
> + return 0;
> +}
> +
> +static int qmp_hdmi_probe(struct platform_device *pdev)
> +{
> + struct clk_init_data init = {
> + .name = "hdmipll",
> + .parent_data = (const struct clk_parent_data[]) {
> + { .fw_name = "xo", .name = "xo_board" },
> + },
> + .flags = CLK_GET_RATE_NOCACHE,
> + .num_parents = 1,
> + };
> + const struct qmp_hdmi_cfg *cfg = of_device_get_match_data(&pdev->dev);
> + struct phy_provider *phy_provider;
> + struct device *dev = &pdev->dev;
> + struct qmp_hdmi_phy *hdmi_phy;
> + int ret, i;
> +
> + hdmi_phy = devm_kzalloc(dev, sizeof(*hdmi_phy), GFP_KERNEL);
> + if (!hdmi_phy)
> + return -ENOMEM;
> +
> + hdmi_phy->dev = dev;
> +
> + hdmi_phy->serdes = devm_platform_ioremap_resource(pdev, 0);
> + if (IS_ERR(hdmi_phy->serdes))
> + return PTR_ERR(hdmi_phy->serdes);
> +
> + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
> + hdmi_phy->tx[i] = devm_platform_ioremap_resource(pdev, 1 + i);
> + if (IS_ERR(hdmi_phy->tx[i]))
> + return PTR_ERR(hdmi_phy->tx[i]);
> + }
> +
> + hdmi_phy->phy_reg = devm_platform_ioremap_resource(pdev, 5);
Please create an enum with all the reg indices
> + if (IS_ERR(hdmi_phy->phy_reg))
> + return PTR_ERR(hdmi_phy->phy_reg);
> +
> + hdmi_phy->clks[0].id = "iface";
> + hdmi_phy->clks[1].id = "ref";
> + ret = devm_clk_bulk_get(dev, ARRAY_SIZE(hdmi_phy->clks), hdmi_phy->clks);
> + if (ret)
> + return ret;
> +
> + hdmi_phy->supplies[0].supply = "vddio";
> + hdmi_phy->supplies[0].init_load_uA = 100000;
> + hdmi_phy->supplies[1].supply = "vcca";
> + hdmi_phy->supplies[1].init_load_uA = 10000;
> + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(hdmi_phy->supplies), hdmi_phy->supplies);
> + if (ret)
> + return ret;
> +
> + platform_set_drvdata(pdev, hdmi_phy);
> +
> + ret = devm_pm_runtime_enable(&pdev->dev);
> + if (ret)
> + return ret;
> +
> + ret = pm_runtime_resume_and_get(&pdev->dev);
> + if (ret)
> + return ret;
> +
> + init.ops = cfg->pll_ops;
> + hdmi_phy->pll_hw.init = &init;
> + ret = devm_clk_hw_register(hdmi_phy->dev, &hdmi_phy->pll_hw);
> + if (ret)
> + goto err;
> +
> + ret = devm_of_clk_add_hw_provider(hdmi_phy->dev, of_clk_hw_simple_get, &hdmi_phy->pll_hw);
> + if (ret)
> + goto err;
> +
> + hdmi_phy->phy = devm_phy_create(dev, pdev->dev.of_node, cfg->phy_ops);
> + if (IS_ERR(hdmi_phy->phy)) {
> + ret = PTR_ERR(hdmi_phy->phy);
> + goto err;
> + }
> +
> + phy_set_drvdata(hdmi_phy->phy, hdmi_phy);
> +
> + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> + pm_runtime_put_noidle(&pdev->dev);
> + return PTR_ERR_OR_ZERO(phy_provider);
> +
> +err:
> + pm_runtime_put_noidle(&pdev->dev);
> + return ret;
> +}
> +
> +static const struct of_device_id qmp_hdmi_of_match_table[] = {
> + {
> + .compatible = "qcom,hdmi-phy-8996", .data = &qmp_hdmi_8996_cfg,
> + },
{ .compatible ... },
?
> + { },
> +};
> +MODULE_DEVICE_TABLE(of, qmp_hdmi_of_match_table);
> +
> +DEFINE_RUNTIME_DEV_PM_OPS(qmp_hdmi_pm_ops,
> + qmp_hdmi_runtime_suspend,
> + qmp_hdmi_runtime_resume,
> + NULL);
> +
> +static struct platform_driver qmp_hdmi_driver = {
> + .probe = qmp_hdmi_probe,
> + .driver = {
> + .name = "qcom-qmp-hdmi-phy",
> + .of_match_table = qmp_hdmi_of_match_table,
> + .pm = &qmp_hdmi_pm_ops,
> + },
> +};
> +
> +module_platform_driver(qmp_hdmi_driver);
> +
> +MODULE_AUTHOR("Dmitry Baryshkov <dmitry.baryshkov at linaro.org>");
> +MODULE_DESCRIPTION("Qualcomm QMP HDMI PHY driver");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-hdmi-msm8996.c b/drivers/phy/qualcomm/phy-qcom-qmp-hdmi-msm8996.c
> new file mode 100644
> index 000000000000..27ffa70d0faa
> --- /dev/null
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-hdmi-msm8996.c
> @@ -0,0 +1,441 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2016, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2023, Linaro Ltd.
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/iopoll.h>
> +#include <linux/phy/phy.h>
> +
> +#include "phy-qcom-qmp-hdmi.h"
> +#include "phy-qcom-qmp-qserdes-com.h"
> +#include "phy-qcom-qmp-qserdes-txrx.h"
> +
> +#define HDMI_VCO_MAX_FREQ 12000000000UL
> +#define HDMI_VCO_MIN_FREQ 8000000000UL
> +
> +#define HDMI_PCLK_MAX_FREQ 600000000UL
> +#define HDMI_PCLK_MIN_FREQ 25000000UL
> +
> +#define HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD 3400000000UL
> +#define HDMI_DIG_FREQ_BIT_CLK_THRESHOLD 1500000000UL
> +#define HDMI_MID_FREQ_BIT_CLK_THRESHOLD 750000000UL
> +#define HDMI_DEFAULT_REF_CLOCK 19200000
> +#define HDMI_PLL_CMP_CNT 1024
> +
> +#define HDMI_PLL_POLL_MAX_READS 100
> +#define HDMI_PLL_POLL_TIMEOUT_US 150
> +
> +#define REG_HDMI_8996_PHY_CFG 0x00000000
> +#define REG_HDMI_8996_PHY_PD_CTL 0x00000004
> +#define REG_HDMI_8996_PHY_MODE 0x00000008
> +#define REG_HDMI_8996_PHY_MISR_CLEAR 0x0000000c
> +#define REG_HDMI_8996_PHY_TX0_TX1_BIST_CFG0 0x00000010
> +#define REG_HDMI_8996_PHY_TX0_TX1_BIST_CFG1 0x00000014
> +#define REG_HDMI_8996_PHY_TX0_TX1_PRBS_SEED_BYTE0 0x00000018
> +#define REG_HDMI_8996_PHY_TX0_TX1_PRBS_SEED_BYTE1 0x0000001c
> +#define REG_HDMI_8996_PHY_TX0_TX1_BIST_PATTERN0 0x00000020
> +#define REG_HDMI_8996_PHY_TX0_TX1_BIST_PATTERN1 0x00000024
> +#define REG_HDMI_8996_PHY_TX2_TX3_BIST_CFG0 0x00000028
> +#define REG_HDMI_8996_PHY_TX2_TX3_BIST_CFG1 0x0000002c
> +#define REG_HDMI_8996_PHY_TX2_TX3_PRBS_SEED_BYTE0 0x00000030
> +#define REG_HDMI_8996_PHY_TX2_TX3_PRBS_SEED_BYTE1 0x00000034
> +#define REG_HDMI_8996_PHY_TX2_TX3_BIST_PATTERN0 0x00000038
> +#define REG_HDMI_8996_PHY_TX2_TX3_BIST_PATTERN1 0x0000003c
> +#define REG_HDMI_8996_PHY_DEBUG_BUS_SEL 0x00000040
> +#define REG_HDMI_8996_PHY_TXCAL_CFG0 0x00000044
> +#define REG_HDMI_8996_PHY_TXCAL_CFG1 0x00000048
> +#define REG_HDMI_8996_PHY_TX0_TX1_LANE_CTL 0x0000004c
> +#define REG_HDMI_8996_PHY_TX2_TX3_LANE_CTL 0x00000050
> +#define REG_HDMI_8996_PHY_LANE_BIST_CONFIG 0x00000054
> +#define REG_HDMI_8996_PHY_CLOCK 0x00000058
> +#define REG_HDMI_8996_PHY_MISC1 0x0000005c
> +#define REG_HDMI_8996_PHY_MISC2 0x00000060
> +#define REG_HDMI_8996_PHY_TX0_TX1_BIST_STATUS0 0x00000064
> +#define REG_HDMI_8996_PHY_TX0_TX1_BIST_STATUS1 0x00000068
> +#define REG_HDMI_8996_PHY_TX0_TX1_BIST_STATUS2 0x0000006c
> +#define REG_HDMI_8996_PHY_TX2_TX3_BIST_STATUS0 0x00000070
> +#define REG_HDMI_8996_PHY_TX2_TX3_BIST_STATUS1 0x00000074
> +#define REG_HDMI_8996_PHY_TX2_TX3_BIST_STATUS2 0x00000078
> +#define REG_HDMI_8996_PHY_PRE_MISR_STATUS0 0x0000007c
> +#define REG_HDMI_8996_PHY_PRE_MISR_STATUS1 0x00000080
> +#define REG_HDMI_8996_PHY_PRE_MISR_STATUS2 0x00000084
> +#define REG_HDMI_8996_PHY_PRE_MISR_STATUS3 0x00000088
> +#define REG_HDMI_8996_PHY_POST_MISR_STATUS0 0x0000008c
> +#define REG_HDMI_8996_PHY_POST_MISR_STATUS1 0x00000090
> +#define REG_HDMI_8996_PHY_POST_MISR_STATUS2 0x00000094
> +#define REG_HDMI_8996_PHY_POST_MISR_STATUS3 0x00000098
> +#define REG_HDMI_8996_PHY_STATUS 0x0000009c
> +#define REG_HDMI_8996_PHY_MISC3_STATUS 0x000000a0
> +#define REG_HDMI_8996_PHY_MISC4_STATUS 0x000000a4
> +#define REG_HDMI_8996_PHY_DEBUG_BUS0 0x000000a8
> +#define REG_HDMI_8996_PHY_DEBUG_BUS1 0x000000ac
> +#define REG_HDMI_8996_PHY_DEBUG_BUS2 0x000000b0
> +#define REG_HDMI_8996_PHY_DEBUG_BUS3 0x000000b4
> +#define REG_HDMI_8996_PHY_PHY_REVISION_ID0 0x000000b8
> +#define REG_HDMI_8996_PHY_PHY_REVISION_ID1 0x000000bc
> +#define REG_HDMI_8996_PHY_PHY_REVISION_ID2 0x000000c0
> +#define REG_HDMI_8996_PHY_PHY_REVISION_ID3 0x000000c4
> +
> +struct qmp_hdmi_8996_post_divider {
> + u64 vco_freq;
> + int hsclk_divsel;
> + int vco_ratio;
> + int tx_band_sel;
> +};
> +
> +static inline u32 qmp_hdmi_8996_pll_get_pll_cmp(u64 fdata, unsigned long ref_clk)
> +{
> + u64 dividend = HDMI_PLL_CMP_CNT * fdata;
HDMI_PLL_CMP_CNT should be ULL
> + u32 divisor = ref_clk * 10;
> + u32 rem;
> +
> + rem = do_div(dividend, divisor);
> + if (rem > (divisor >> 1))
> + dividend++;
> +
> + return dividend - 1;
> +}
> +
> +static int qmp_hdmi_8996_pll_get_post_div(struct qmp_hdmi_8996_post_divider *pd, u64 bclk)
> +{
> + int ratio[] = { 2, 3, 4, 5, 6, 9, 10, 12, 14, 15, 20, 21, 25, 28, 35 };
> + int hs_divsel[] = { 0, 4, 8, 12, 1, 5, 2, 9, 3, 13, 10, 7, 14, 11, 15 };
> + int tx_band_sel[] = { 0, 1, 2, 3 };
> + u64 vco_freq[60];
60 -> ARRAY_SIZE() * ARRAY_SIZE()?
> + u64 vco, vco_optimal;
> + int half_rate_mode = 0;
> + int vco_optimal_index, vco_freq_index;
> + int i, j;
Reverse-Christmas-tree?
> +
> +retry:
> + vco_optimal = HDMI_VCO_MAX_FREQ;
> + vco_optimal_index = -1;
> + vco_freq_index = 0;
> + for (i = 0; i < 15; i++) {
> + for (j = 0; j < 4; j++) {
> + u32 ratio_mult = ratio[i] << tx_band_sel[j];
> +
> + vco = bclk >> half_rate_mode;
> + vco *= ratio_mult;
> + vco_freq[vco_freq_index++] = vco;
> + }
> + }
> +
> + for (i = 0; i < 60; i++) {
> + u64 vco_tmp = vco_freq[i];
> +
> + if ((vco_tmp >= HDMI_VCO_MIN_FREQ) &&
> + (vco_tmp <= vco_optimal)) {
> + vco_optimal = vco_tmp;
> + vco_optimal_index = i;
> + }
> + }
> +
> + if (vco_optimal_index == -1) {
> + if (!half_rate_mode) {
> + half_rate_mode = 1;
> + goto retry;
> + }
> +
> + return -EINVAL;
> + }
> +
> + pd->vco_freq = vco_optimal;
> + pd->tx_band_sel = tx_band_sel[vco_optimal_index % 4];
> + pd->vco_ratio = ratio[vco_optimal_index / 4];
> + pd->hsclk_divsel = hs_divsel[vco_optimal_index / 4];
> +
> + return 0;
> +}
> +
> +static int qmp_hdmi_8996_phy_set_rate(struct qmp_hdmi_phy *hdmi_phy)
> +{
> + unsigned long parent_rate = HDMI_DEFAULT_REF_CLOCK;
HDMI_DEFAULT_REF_CLOCK could be UL for completeness
> + unsigned long rate = hdmi_phy->hdmi_opts.pixel_clk_rate * 1000;
> + struct qmp_hdmi_8996_post_divider pd;
> + bool gen_ssc = false;
> + u64 bclk;
> + u64 dec_start;
> + u64 frac_start;
> + u64 fdata;
> + u32 pll_divisor;
> + u32 rem;
> + u32 integloop_gain;
> + u32 pll_cmp;
> + int i, ret;
This list is very long, perhaps collapse some common-type var definitions
> +
> + bclk = ((u64)rate) * 10;
19.2 mil * 10 will not overflow u32
> + ret = qmp_hdmi_8996_pll_get_post_div(&pd, bclk);
> + if (ret) {
> + dev_err(hdmi_phy->dev, "PLL calculation failed\n");
> + return ret;
> + }
> +
> + dec_start = pd.vco_freq;
> + pll_divisor = 4 * parent_rate;
> + do_div(dec_start, pll_divisor);
> +
> + frac_start = pd.vco_freq * (1 << 20);
> +
> + rem = do_div(frac_start, pll_divisor);
> + frac_start -= dec_start * (1 << 20);
> + if (rem > (pll_divisor >> 1))
> + frac_start++;
> +
> + fdata = pd.vco_freq;
> + do_div(fdata, pd.vco_ratio);
> +
> + pll_cmp = qmp_hdmi_8996_pll_get_pll_cmp(fdata, parent_rate);
> +
> + /* Initially shut down PHY */
> + dev_dbg(hdmi_phy->dev, "Disabling PHY");
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_PD_CTL, 0x0);
> + udelay(500);
usleep_range
https://www.kernel.org/doc/Documentation/timers/timers-howto.txt
> +
> + /* Power up sequence */
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_BG_CTRL, 0x04);
> +
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_PD_CTL, 0x1);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_RESETSM_CNTRL, 0x20);
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_TX0_TX1_LANE_CTL, 0x0f);
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_TX2_TX3_LANE_CTL, 0x0f);
> +
> + hdmi_tx_chan_write(hdmi_phy, 0, QSERDES_TX_LANE_MODE, 0x43);
> + hdmi_tx_chan_write(hdmi_phy, 2, QSERDES_TX_LANE_MODE, 0x43);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SYSCLK_BUF_ENABLE, 0x1e);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x07);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SYSCLK_EN_SEL, 0x37);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SYS_CLK_CTRL, 0x02);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_CLK_ENABLE1, 0x0e);
> +
> + if (frac_start != 0 || gen_ssc) {
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_PLL_CCTRL_MODE0, 0x28);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_PLL_RCTRL_MODE0, 0x16);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_CP_CTRL_MODE0,
> + 11000000 / (parent_rate/ 20));
> + integloop_gain = (64 * parent_rate) / HDMI_DEFAULT_REF_CLOCK;
do_div
> + } else {
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_PLL_CCTRL_MODE0, 0x01);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_PLL_RCTRL_MODE0, 0x10);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_CP_CTRL_MODE0, 0x23);
> + integloop_gain = (1022 * parent_rate) / (100 * 1000 * 1000);
> + }
> +
> + /* Bypass VCO calibration */
> + if (bclk > HDMI_DIG_FREQ_BIT_CLK_THRESHOLD) {
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SVS_MODE_CLK_SEL, 1);
> + integloop_gain <<= 1;
> + } else {
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SVS_MODE_CLK_SEL, 2);
> + integloop_gain <<= 2;
> + }
> +
> + integloop_gain = min_t(u32, integloop_gain, 2046);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_BG_TRIM, 0x0f);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_PLL_IVCO, 0x0f);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_VCO_TUNE_CTRL, 0);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_BG_CTRL, 0x06);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_CLK_SELECT, 0x30);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_HSCLK_SEL, 0x20 | pd.hsclk_divsel);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_LOCK_CMP_EN, 0x0);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_DEC_START_MODE0, dec_start);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_DIV_FRAC_START1_MODE0,
> + frac_start & 0xff);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_DIV_FRAC_START2_MODE0,
> + (frac_start >> 8) & 0xff);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_DIV_FRAC_START3_MODE0,
> + (frac_start >> 16) & 0xf);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_INTEGLOOP_GAIN0_MODE0,
> + integloop_gain & 0xff);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_INTEGLOOP_GAIN1_MODE0,
> + (integloop_gain >> 8) & 0xff);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_LOCK_CMP1_MODE0,
> + pll_cmp & 0xff);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_LOCK_CMP2_MODE0,
> + (pll_cmp >> 8) & 0xff);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_LOCK_CMP3_MODE0,
> + (pll_cmp >> 16) & 0x3);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_VCO_TUNE_MAP, 0x00);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_CORE_CLK_EN, 0x2c);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_CORECLK_DIV, 5);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_CMN_CONFIG, 0x02);
> +
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_RESCODE_DIV_NUM, 0x15);
> +
> + /* TX lanes setup (TX 0/1/2/3) */
> + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_CLKBUF_ENABLE, 0x03);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TX_BAND, pd.tx_band_sel + 4);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_RESET_TSYNC_EN, 0x03);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_VMODE_CTRL1, 0x00);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TX_DRV_LVL_OFFSET, 0x00);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_RES_CODE_LANE_OFFSET, 0x00);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TRAN_DRVR_EMP_EN, 0x03);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_PARRATE_REC_DETECT_IDLE_EN, 0x40);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_HP_PD_ENABLES,
is this a misspelt 'ENABLED'?
> + i != 3 ? 0xc : 0x3);
> + }
> +
> + if (bclk > HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD) {
> + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TX_DRV_LVL,
> + i != 3 ? 0x25 : 0x22);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TX_EMP_POST1_LVL,
> + i != 3 ? 0x23 : 0x27);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_VMODE_CTRL2,
> + i != 3 ? 0x0d : 0x00);
> + }
> + } else if (bclk > HDMI_MID_FREQ_BIT_CLK_THRESHOLD) {
> + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TX_DRV_LVL, 0x25);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TX_EMP_POST1_LVL, 0x23);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_VMODE_CTRL2,
> + i != 3 ? 0x0d : 0x00);
> + }
> + } else {
> + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) {
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TX_DRV_LVL, 0x20);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_TX_EMP_POST1_LVL, 0x20);
> + hdmi_tx_chan_write(hdmi_phy, i, QSERDES_TX_VMODE_CTRL2, 0x0e);
> + }
> + }
> +
> + if (bclk > HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD)
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_MODE, 0x10);
> + else
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_MODE, 0x00);
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_PD_CTL, 0x1f);
> +
> + return 0;
> +}
> +
> +static int qmp_hdmi_8996_phy_power_on(struct phy *phy)
> +{
> + struct qmp_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
> + u32 status;
> + int i, ret = 0;
Reverse-Christmas-tree?
> +
> + ret = qmp_hdmi_8996_phy_set_rate(hdmi_phy);
> + if (ret) {
> + dev_err(hdmi_phy->dev, "Setting pixel clock rate failed\n");
> + return ret;
> + }
> +
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_CFG, 0x1);
> + udelay(100);
usleep_range
> +
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_CFG, 0x19);
> + udelay(100);
usleep_range
> +
> + ret = readl_poll_timeout(hdmi_phy->serdes + QSERDES_COM_C_READY_STATUS,
> + status, status & BIT(0),
> + HDMI_PLL_POLL_TIMEOUT_US,
> + HDMI_PLL_POLL_MAX_READS * HDMI_PLL_POLL_TIMEOUT_US);
> +
> + if (ret) {
> + dev_warn(hdmi_phy->dev, "HDMI PLL is not locked\n");
> + return ret;
> + }
> +
> + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++)
> + hdmi_tx_chan_write(hdmi_phy, i,
> + QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN,
> + 0x6f);
> +
> + /* Disable SSC */
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SSC_PER1, 0x0);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SSC_PER2, 0x0);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SSC_STEP_SIZE1, 0x0);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SSC_STEP_SIZE2, 0x0);
> + hdmi_pll_write(hdmi_phy, QSERDES_COM_SSC_EN_CENTER, 0x2);
> +
> + ret = readl_poll_timeout(hdmi_phy->phy_reg + REG_HDMI_8996_PHY_STATUS,
> + status, status & BIT(0),
> + HDMI_PLL_POLL_TIMEOUT_US,
> + HDMI_PLL_POLL_MAX_READS * HDMI_PLL_POLL_TIMEOUT_US);
> + if (ret) {
> + dev_warn(hdmi_phy->dev, "HDMI PLL is not locked\n");
> + return ret;
> + }
> +
> + /* Restart the retiming buffer */
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_CFG, 0x18);
> + udelay(1);
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_CFG, 0x19);
> +
> + return 0;
> +}
> +
> +static int qmp_hdmi_8996_phy_power_off(struct phy *phy)
> +{
> + struct qmp_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
> +
> + hdmi_phy_write(hdmi_phy, REG_HDMI_8996_PHY_CFG, 0x6);
> + usleep_range(100, 150);
> +
> + return 0;
> +}
> +
> +static long qmp_hdmi_8996_pll_round_rate(struct clk_hw *hw,
> + unsigned long rate,
> + unsigned long *parent_rate)
> +{
> + return clamp(rate, HDMI_PCLK_MIN_FREQ, HDMI_PCLK_MAX_FREQ);
> +}
> +
> +static unsigned long qmp_hdmi_8996_pll_recalc_rate(struct clk_hw *hw,
> + unsigned long parent_rate)
> +{
> + struct qmp_hdmi_phy *phy = hw_clk_to_pll(hw);
> + u32 cmp1, cmp2, cmp3, pll_cmp;
> +
> + cmp1 = hdmi_pll_read(phy, QSERDES_COM_LOCK_CMP1_MODE0);
> + cmp2 = hdmi_pll_read(phy, QSERDES_COM_LOCK_CMP2_MODE0);
> + cmp3 = hdmi_pll_read(phy, QSERDES_COM_LOCK_CMP3_MODE0);
> +
> + pll_cmp = cmp1 | (cmp2 << 8) | (cmp3 << 16);
FIELD_PREP to avoid overflows if hw returns garbage?
Or is it supposed to overflow by design?
> +
> + return mult_frac(pll_cmp + 1, parent_rate, HDMI_PLL_CMP_CNT);
> +}
> +
> +static int qmp_hdmi_8996_pll_is_enabled(struct clk_hw *hw)
> +{
> + struct qmp_hdmi_phy *phy = hw_clk_to_pll(hw);
> + u32 status;
> + int pll_locked;
Reverse-Christmas-tree?
Konrad
> +
> + status = hdmi_pll_read(phy, QSERDES_COM_C_READY_STATUS);
> + pll_locked = status & BIT(0);
> +
> + return pll_locked;
> +}
> +
> +static const struct clk_ops qmp_hdmi_8996_pll_ops = {
> + .recalc_rate = qmp_hdmi_8996_pll_recalc_rate,
> + .round_rate = qmp_hdmi_8996_pll_round_rate,
> + .is_enabled = qmp_hdmi_8996_pll_is_enabled,
> +};
> +
> +static const struct phy_ops qmp_hdmi_8996_phy_ops = {
> + .init = qmp_hdmi_phy_init,
> + .configure = qmp_hdmi_phy_configure,
> + .power_on = qmp_hdmi_8996_phy_power_on,
> + .power_off = qmp_hdmi_8996_phy_power_off,
> + .exit = qmp_hdmi_phy_exit,
> + .owner = THIS_MODULE,
> +};
> +
> +const struct qmp_hdmi_cfg qmp_hdmi_8996_cfg = {
> + .pll_ops = &qmp_hdmi_8996_pll_ops,
> + .phy_ops = &qmp_hdmi_8996_phy_ops,
> +};
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-hdmi.h b/drivers/phy/qualcomm/phy-qcom-qmp-hdmi.h
> new file mode 100644
> index 000000000000..25d307a8f287
> --- /dev/null
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-hdmi.h
> @@ -0,0 +1,75 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (c) 2016, The Linux Foundation. All rights reserved.
> + * Copyright (c) 2023, Linaro Ltd.
> + */
> +
> +#ifndef PHY_QCOM_QMP_HDMI_H
> +#define PHY_QCOM_QMP_HDMI_H
> +
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/phy/phy-hdmi.h>
> +
> +#define MAX_CLKS 2
> +#define MAX_SUPPLIES 2
> +
> +#define HDMI_NUM_TX_CHANNEL 4
> +
> +struct qmp_hdmi_phy {
> + struct device *dev;
> + struct phy *phy;
> + void __iomem *serdes;
> + void __iomem *tx[HDMI_NUM_TX_CHANNEL];
> + void __iomem *phy_reg;
> +
> + struct phy_configure_opts_hdmi hdmi_opts;
> +
> + struct clk_hw pll_hw;
> + struct clk_bulk_data clks[MAX_CLKS];
> + struct regulator_bulk_data supplies[MAX_SUPPLIES];
> +};
> +
> +struct qmp_hdmi_cfg {
> + const struct clk_ops *pll_ops;
> + const struct phy_ops *phy_ops;
> +};
> +
> +#define hw_clk_to_pll(x) container_of(x, struct qmp_hdmi_phy, pll_hw)
> +
> +static inline void hdmi_phy_write(struct qmp_hdmi_phy *phy, int offset,
> + u32 data)
> +{
> + writel(data, phy->phy_reg + offset);
> +}
> +
> +static inline u32 hdmi_phy_read(struct qmp_hdmi_phy *phy, int offset)
> +{
> + return readl(phy->phy_reg + offset);
> +}
> +
> +static inline void hdmi_pll_write(struct qmp_hdmi_phy *phy, int offset,
> + u32 data)
> +{
> + writel(data, phy->serdes + offset);
> +}
> +
> +static inline u32 hdmi_pll_read(struct qmp_hdmi_phy *phy, int offset)
> +{
> + return readl(phy->serdes + offset);
> +}
> +
> +static inline void hdmi_tx_chan_write(struct qmp_hdmi_phy *phy, int channel,
> + int offset, int data)
> +{
> + writel(data, phy->tx[channel] + offset);
> +}
> +
> +int qmp_hdmi_phy_init(struct phy *phy);
> +int qmp_hdmi_phy_configure(struct phy *phy, union phy_configure_opts *opts);
> +int qmp_hdmi_phy_exit(struct phy *phy);
> +
> +extern const struct qmp_hdmi_cfg qmp_hdmi_8996_cfg;
> +
> +#endif
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