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Message-ID: <1550219361.15764.4.camel@mtksdaap41>
Date: Fri, 15 Feb 2019 16:29:21 +0800
From: CK Hu <ck.hu@...iatek.com>
To: Jitao Shi <jitao.shi@...iatek.com>
CC: Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
"Mark Rutland" <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>, <linux-pwm@...r.kernel.org>,
David Airlie <airlied@...ux.ie>,
"Matthias Brugger" <matthias.bgg@...il.com>,
Thierry Reding <treding@...dia.com>,
"Ajay Kumar" <ajaykumar.rs@...sung.com>,
Inki Dae <inki.dae@...sung.com>,
"Rahul Sharma" <rahul.sharma@...sung.com>,
Sean Paul <seanpaul@...omium.org>,
Vincent Palatin <vpalatin@...omium.org>,
Andy Yan <andy.yan@...k-chips.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
"Russell King" <rmk+kernel@....linux.org.uk>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<dri-devel@...ts.freedesktop.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<srv_heupstream@...iatek.com>,
Sascha Hauer <kernel@...gutronix.de>,
<yingjoe.chen@...iatek.com>, <eddie.huang@...iatek.com>,
<cawa.cheng@...iatek.com>, <bibby.hsieh@...iatek.com>,
<stonea168@....com>
Subject: Re: [PATCH] drm/mediatek: add mipi_tx driver for mt8183
Hi, Jitao:
On Tue, 2019-02-12 at 14:19 +0800, Jitao Shi wrote:
> This patch adds mipi tx driver support for mt8183.
>
> Mipi_tx of mt8183 is very different to mt8173.
> 1.Separate mipi tx setting to mtk_mt8173_mipi_tx.c for mt8173
> 2.Separate mipi tx setting to mtk_mt8183_mipi_tx.c for mt8183
> 3.To reuse the common code, make the common functions in mtk_mipi_tx.c
>
> Signed-off-by: Jitao Shi <jitao.shi@...iatek.com>
> ---
> drivers/gpu/drm/mediatek/Makefile | 2 +
> drivers/gpu/drm/mediatek/mtk_mipi_tx.c | 352 ++----------------
> drivers/gpu/drm/mediatek/mtk_mipi_tx.h | 52 +++
> drivers/gpu/drm/mediatek/mtk_mt8173_mipi_tx.c | 290 +++++++++++++++
> drivers/gpu/drm/mediatek/mtk_mt8183_mipi_tx.c | 168 +++++++++
> 5 files changed, 549 insertions(+), 315 deletions(-)
> create mode 100644 drivers/gpu/drm/mediatek/mtk_mipi_tx.h
> create mode 100644 drivers/gpu/drm/mediatek/mtk_mt8173_mipi_tx.c
> create mode 100644 drivers/gpu/drm/mediatek/mtk_mt8183_mipi_tx.c
>
> diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
> index 82ae49c64221..8067a4be8311 100644
> --- a/drivers/gpu/drm/mediatek/Makefile
> +++ b/drivers/gpu/drm/mediatek/Makefile
> @@ -12,6 +12,8 @@ mediatek-drm-y := mtk_disp_color.o \
> mtk_drm_plane.o \
> mtk_dsi.o \
> mtk_mipi_tx.o \
> + mtk_mt8173_mipi_tx.o \
> + mtk_mt8183_mipi_tx.o \
> mtk_dpi.o
>
> obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o
> diff --git a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c
> index 90e913108950..7591a38ca565 100644
> --- a/drivers/gpu/drm/mediatek/mtk_mipi_tx.c
> +++ b/drivers/gpu/drm/mediatek/mtk_mipi_tx.c
> @@ -11,292 +11,45 @@
> * GNU General Public License for more details.
> */
>
> -#include <linux/clk.h>
> -#include <linux/clk-provider.h>
> -#include <linux/delay.h>
> -#include <linux/io.h>
> -#include <linux/module.h>
> -#include <linux/of_device.h>
> -#include <linux/platform_device.h>
> -#include <linux/phy/phy.h>
> -
> -#define MIPITX_DSI_CON 0x00
> -#define RG_DSI_LDOCORE_EN BIT(0)
> -#define RG_DSI_CKG_LDOOUT_EN BIT(1)
> -#define RG_DSI_BCLK_SEL (3 << 2)
> -#define RG_DSI_LD_IDX_SEL (7 << 4)
> -#define RG_DSI_PHYCLK_SEL (2 << 8)
> -#define RG_DSI_DSICLK_FREQ_SEL BIT(10)
> -#define RG_DSI_LPTX_CLMP_EN BIT(11)
> -
> -#define MIPITX_DSI_CLOCK_LANE 0x04
> -#define MIPITX_DSI_DATA_LANE0 0x08
> -#define MIPITX_DSI_DATA_LANE1 0x0c
> -#define MIPITX_DSI_DATA_LANE2 0x10
> -#define MIPITX_DSI_DATA_LANE3 0x14
> -#define RG_DSI_LNTx_LDOOUT_EN BIT(0)
> -#define RG_DSI_LNTx_CKLANE_EN BIT(1)
> -#define RG_DSI_LNTx_LPTX_IPLUS1 BIT(2)
> -#define RG_DSI_LNTx_LPTX_IPLUS2 BIT(3)
> -#define RG_DSI_LNTx_LPTX_IMINUS BIT(4)
> -#define RG_DSI_LNTx_LPCD_IPLUS BIT(5)
> -#define RG_DSI_LNTx_LPCD_IMINUS BIT(6)
> -#define RG_DSI_LNTx_RT_CODE (0xf << 8)
> -
> -#define MIPITX_DSI_TOP_CON 0x40
> -#define RG_DSI_LNT_INTR_EN BIT(0)
> -#define RG_DSI_LNT_HS_BIAS_EN BIT(1)
> -#define RG_DSI_LNT_IMP_CAL_EN BIT(2)
> -#define RG_DSI_LNT_TESTMODE_EN BIT(3)
> -#define RG_DSI_LNT_IMP_CAL_CODE (0xf << 4)
> -#define RG_DSI_LNT_AIO_SEL (7 << 8)
> -#define RG_DSI_PAD_TIE_LOW_EN BIT(11)
> -#define RG_DSI_DEBUG_INPUT_EN BIT(12)
> -#define RG_DSI_PRESERVE (7 << 13)
> -
> -#define MIPITX_DSI_BG_CON 0x44
> -#define RG_DSI_BG_CORE_EN BIT(0)
> -#define RG_DSI_BG_CKEN BIT(1)
> -#define RG_DSI_BG_DIV (0x3 << 2)
> -#define RG_DSI_BG_FAST_CHARGE BIT(4)
> -#define RG_DSI_VOUT_MSK (0x3ffff << 5)
> -#define RG_DSI_V12_SEL (7 << 5)
> -#define RG_DSI_V10_SEL (7 << 8)
> -#define RG_DSI_V072_SEL (7 << 11)
> -#define RG_DSI_V04_SEL (7 << 14)
> -#define RG_DSI_V032_SEL (7 << 17)
> -#define RG_DSI_V02_SEL (7 << 20)
> -#define RG_DSI_BG_R1_TRIM (0xf << 24)
> -#define RG_DSI_BG_R2_TRIM (0xf << 28)
> -
> -#define MIPITX_DSI_PLL_CON0 0x50
> -#define RG_DSI_MPPLL_PLL_EN BIT(0)
> -#define RG_DSI_MPPLL_DIV_MSK (0x1ff << 1)
> -#define RG_DSI_MPPLL_PREDIV (3 << 1)
> -#define RG_DSI_MPPLL_TXDIV0 (3 << 3)
> -#define RG_DSI_MPPLL_TXDIV1 (3 << 5)
> -#define RG_DSI_MPPLL_POSDIV (7 << 7)
> -#define RG_DSI_MPPLL_MONVC_EN BIT(10)
> -#define RG_DSI_MPPLL_MONREF_EN BIT(11)
> -#define RG_DSI_MPPLL_VOD_EN BIT(12)
> -
> -#define MIPITX_DSI_PLL_CON1 0x54
> -#define RG_DSI_MPPLL_SDM_FRA_EN BIT(0)
> -#define RG_DSI_MPPLL_SDM_SSC_PH_INIT BIT(1)
> -#define RG_DSI_MPPLL_SDM_SSC_EN BIT(2)
> -#define RG_DSI_MPPLL_SDM_SSC_PRD (0xffff << 16)
> -
> -#define MIPITX_DSI_PLL_CON2 0x58
> -
> -#define MIPITX_DSI_PLL_TOP 0x64
> -#define RG_DSI_MPPLL_PRESERVE (0xff << 8)
> -
> -#define MIPITX_DSI_PLL_PWR 0x68
> -#define RG_DSI_MPPLL_SDM_PWR_ON BIT(0)
> -#define RG_DSI_MPPLL_SDM_ISO_EN BIT(1)
> -#define RG_DSI_MPPLL_SDM_PWR_ACK BIT(8)
> -
> -#define MIPITX_DSI_SW_CTRL 0x80
> -#define SW_CTRL_EN BIT(0)
> -
> -#define MIPITX_DSI_SW_CTRL_CON0 0x84
> -#define SW_LNTC_LPTX_PRE_OE BIT(0)
> -#define SW_LNTC_LPTX_OE BIT(1)
> -#define SW_LNTC_LPTX_P BIT(2)
> -#define SW_LNTC_LPTX_N BIT(3)
> -#define SW_LNTC_HSTX_PRE_OE BIT(4)
> -#define SW_LNTC_HSTX_OE BIT(5)
> -#define SW_LNTC_HSTX_ZEROCLK BIT(6)
> -#define SW_LNT0_LPTX_PRE_OE BIT(7)
> -#define SW_LNT0_LPTX_OE BIT(8)
> -#define SW_LNT0_LPTX_P BIT(9)
> -#define SW_LNT0_LPTX_N BIT(10)
> -#define SW_LNT0_HSTX_PRE_OE BIT(11)
> -#define SW_LNT0_HSTX_OE BIT(12)
> -#define SW_LNT0_LPRX_EN BIT(13)
> -#define SW_LNT1_LPTX_PRE_OE BIT(14)
> -#define SW_LNT1_LPTX_OE BIT(15)
> -#define SW_LNT1_LPTX_P BIT(16)
> -#define SW_LNT1_LPTX_N BIT(17)
> -#define SW_LNT1_HSTX_PRE_OE BIT(18)
> -#define SW_LNT1_HSTX_OE BIT(19)
> -#define SW_LNT2_LPTX_PRE_OE BIT(20)
> -#define SW_LNT2_LPTX_OE BIT(21)
> -#define SW_LNT2_LPTX_P BIT(22)
> -#define SW_LNT2_LPTX_N BIT(23)
> -#define SW_LNT2_HSTX_PRE_OE BIT(24)
> -#define SW_LNT2_HSTX_OE BIT(25)
> -
> -struct mtk_mipitx_data {
> - const u32 mppll_preserve;
> -};
> -
> -struct mtk_mipi_tx {
> - struct device *dev;
> - void __iomem *regs;
> - u32 data_rate;
> - const struct mtk_mipitx_data *driver_data;
> - struct clk_hw pll_hw;
> - struct clk *pll;
> -};
> +#include "mtk_mipi_tx.h"
>
> -static inline struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw)
> +inline struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw)
> {
> return container_of(hw, struct mtk_mipi_tx, pll_hw);
> }
>
> -static void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> - u32 bits)
> +void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> + u32 bits)
> {
> u32 temp = readl(mipi_tx->regs + offset);
>
> writel(temp & ~bits, mipi_tx->regs + offset);
> }
>
> -static void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> - u32 bits)
> +void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> + u32 bits)
> {
> u32 temp = readl(mipi_tx->regs + offset);
>
> writel(temp | bits, mipi_tx->regs + offset);
> }
>
> -static void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> - u32 mask, u32 data)
> +void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32 offset,
> + u32 mask, u32 data)
> {
> u32 temp = readl(mipi_tx->regs + offset);
>
> writel((temp & ~mask) | (data & mask), mipi_tx->regs + offset);
> }
>
> -static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw)
> -{
> - struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
> - u8 txdiv, txdiv0, txdiv1;
> - u64 pcw;
> -
> - dev_dbg(mipi_tx->dev, "prepare: %u Hz\n", mipi_tx->data_rate);
> -
> - if (mipi_tx->data_rate >= 500000000) {
> - txdiv = 1;
> - txdiv0 = 0;
> - txdiv1 = 0;
> - } else if (mipi_tx->data_rate >= 250000000) {
> - txdiv = 2;
> - txdiv0 = 1;
> - txdiv1 = 0;
> - } else if (mipi_tx->data_rate >= 125000000) {
> - txdiv = 4;
> - txdiv0 = 2;
> - txdiv1 = 0;
> - } else if (mipi_tx->data_rate > 62000000) {
> - txdiv = 8;
> - txdiv0 = 2;
> - txdiv1 = 1;
> - } else if (mipi_tx->data_rate >= 50000000) {
> - txdiv = 16;
> - txdiv0 = 2;
> - txdiv1 = 2;
> - } else {
> - return -EINVAL;
> - }
> -
> - mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_BG_CON,
> - RG_DSI_VOUT_MSK |
> - RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN,
> - (4 << 20) | (4 << 17) | (4 << 14) |
> - (4 << 11) | (4 << 8) | (4 << 5) |
> - RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
> -
> - usleep_range(30, 100);
> -
> - mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> - RG_DSI_LNT_IMP_CAL_CODE | RG_DSI_LNT_HS_BIAS_EN,
> - (8 << 4) | RG_DSI_LNT_HS_BIAS_EN);
> -
> - mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_CON,
> - RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
> -
> - mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
> - RG_DSI_MPPLL_SDM_PWR_ON |
> - RG_DSI_MPPLL_SDM_ISO_EN,
> - RG_DSI_MPPLL_SDM_PWR_ON);
> -
> - mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> - RG_DSI_MPPLL_PLL_EN);
> -
> - mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> - RG_DSI_MPPLL_TXDIV0 | RG_DSI_MPPLL_TXDIV1 |
> - RG_DSI_MPPLL_PREDIV,
> - (txdiv0 << 3) | (txdiv1 << 5));
> -
> - /*
> - * PLL PCW config
> - * PCW bit 24~30 = integer part of pcw
> - * PCW bit 0~23 = fractional part of pcw
> - * pcw = data_Rate*4*txdiv/(Ref_clk*2);
> - * Post DIV =4, so need data_Rate*4
> - * Ref_clk is 26MHz
> - */
> - pcw = div_u64(((u64)mipi_tx->data_rate * 2 * txdiv) << 24,
> - 26000000);
> - writel(pcw, mipi_tx->regs + MIPITX_DSI_PLL_CON2);
> -
> - mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
> - RG_DSI_MPPLL_SDM_FRA_EN);
> -
> - mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON0, RG_DSI_MPPLL_PLL_EN);
> -
> - usleep_range(20, 100);
> -
> - mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
> - RG_DSI_MPPLL_SDM_SSC_EN);
> -
> - mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
> - RG_DSI_MPPLL_PRESERVE,
> - mipi_tx->driver_data->mppll_preserve);
> -
> - return 0;
> -}
> -
> -static void mtk_mipi_tx_pll_unprepare(struct clk_hw *hw)
> -{
> - struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
> -
> - dev_dbg(mipi_tx->dev, "unprepare\n");
> -
> - mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> - RG_DSI_MPPLL_PLL_EN);
> -
> - mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
> - RG_DSI_MPPLL_PRESERVE, 0);
> -
> - mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
> - RG_DSI_MPPLL_SDM_ISO_EN |
> - RG_DSI_MPPLL_SDM_PWR_ON,
> - RG_DSI_MPPLL_SDM_ISO_EN);
> -
> - mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> - RG_DSI_LNT_HS_BIAS_EN);
> -
> - mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_CON,
> - RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
> -
> - mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_BG_CON,
> - RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
> -
> - mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> - RG_DSI_MPPLL_DIV_MSK);
> -}
> -
> -static long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
> - unsigned long *prate)
> +long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long *prate)
> {
> return clamp_val(rate, 50000000, 1250000000);
> }
>
> -static int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> - unsigned long parent_rate)
> +int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long parent_rate)
> {
> struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
>
> @@ -307,37 +60,14 @@ static int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> return 0;
> }
>
> -static unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw,
> - unsigned long parent_rate)
> +unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw,
> + unsigned long parent_rate)
> {
> struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
>
> return mipi_tx->data_rate;
> }
>
> -static const struct clk_ops mtk_mipi_tx_pll_ops = {
> - .prepare = mtk_mipi_tx_pll_prepare,
> - .unprepare = mtk_mipi_tx_pll_unprepare,
> - .round_rate = mtk_mipi_tx_pll_round_rate,
> - .set_rate = mtk_mipi_tx_pll_set_rate,
> - .recalc_rate = mtk_mipi_tx_pll_recalc_rate,
> -};
> -
> -static int mtk_mipi_tx_power_on_signal(struct phy *phy)
> -{
> - struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
> - u32 reg;
> -
> - for (reg = MIPITX_DSI_CLOCK_LANE;
> - reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
> - mtk_mipi_tx_set_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
> -
> - mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> - RG_DSI_PAD_TIE_LOW_EN);
> -
> - return 0;
> -}
> -
> static int mtk_mipi_tx_power_on(struct phy *phy)
> {
> struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
> @@ -349,30 +79,16 @@ static int mtk_mipi_tx_power_on(struct phy *phy)
> return ret;
>
> /* Enable DSI Lane LDO outputs, disable pad tie low */
> - mtk_mipi_tx_power_on_signal(phy);
> -
> + mipi_tx->driver_data->mipi_tx_enable_signal(phy);
> return 0;
> }
>
> -static void mtk_mipi_tx_power_off_signal(struct phy *phy)
> -{
> - struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
> - u32 reg;
> -
> - mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> - RG_DSI_PAD_TIE_LOW_EN);
> -
> - for (reg = MIPITX_DSI_CLOCK_LANE;
> - reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
> - mtk_mipi_tx_clear_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
> -}
> -
> static int mtk_mipi_tx_power_off(struct phy *phy)
> {
> struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
>
> /* Enable pad tie low, disable DSI Lane LDO outputs */
> - mtk_mipi_tx_power_off_signal(phy);
> + mipi_tx->driver_data->mipi_tx_disable_signal(phy);
>
> /* Disable PLL and power down core */
> clk_disable_unprepare(mipi_tx->pll);
> @@ -386,15 +102,23 @@ static const struct phy_ops mtk_mipi_tx_ops = {
> .owner = THIS_MODULE,
> };
>
> +static void mtk_mipi_tx_clk_get_ops(struct mtk_mipi_tx *mipi_tx,
> + const struct clk_ops **ops)
> +{
> + if (mipi_tx && mipi_tx->driver_data &&
> + mipi_tx->driver_data->mipi_tx_clk_ops)
> + *ops = mipi_tx->driver_data->mipi_tx_clk_ops;
> + else
> + dev_err(mipi_tx->dev, "Failed to get clk ops of phy\n");
> +}
> +
> static int mtk_mipi_tx_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> struct mtk_mipi_tx *mipi_tx;
> struct resource *mem;
> - struct clk *ref_clk;
> const char *ref_clk_name;
> struct clk_init_data clk_init = {
> - .ops = &mtk_mipi_tx_pll_ops,
> .num_parents = 1,
> .parent_names = (const char * const *)&ref_clk_name,
> .flags = CLK_SET_RATE_GATE,
> @@ -408,6 +132,7 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev)
> return -ENOMEM;
>
> mipi_tx->driver_data = of_device_get_match_data(dev);
> +
> mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> mipi_tx->regs = devm_ioremap_resource(dev, mem);
> if (IS_ERR(mipi_tx->regs)) {
> @@ -416,13 +141,14 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev)
> return ret;
> }
>
> - ref_clk = devm_clk_get(dev, NULL);
> - if (IS_ERR(ref_clk)) {
> - ret = PTR_ERR(ref_clk);
> + mipi_tx->ref_clk = devm_clk_get(dev, "ref_clk");
I do not see "ref_clk" in binding document [1]. In mt8173.dtsi [2] , it
also has no this parameter. Does this patch work for MT8173?
Regards,
CK
[1]
https://www.kernel.org/doc/Documentation/devicetree/bindings/display/mediatek/mediatek%2Cdsi.txt
[2]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/mediatek/mt8173.dtsi
> + if (IS_ERR(mipi_tx->ref_clk)) {
> + ret = PTR_ERR(mipi_tx->ref_clk);
> dev_err(dev, "Failed to get reference clock: %d\n", ret);
> return ret;
> }
> - ref_clk_name = __clk_get_name(ref_clk);
> +
> + ref_clk_name = __clk_get_name(mipi_tx->ref_clk);
>
> ret = of_property_read_string(dev->of_node, "clock-output-names",
> &clk_init.name);
> @@ -431,6 +157,8 @@ static int mtk_mipi_tx_probe(struct platform_device *pdev)
> return ret;
> }
>
> + mtk_mipi_tx_clk_get_ops(mipi_tx, &clk_init.ops);
> +
> mipi_tx->pll_hw.init = &clk_init;
> mipi_tx->pll = devm_clk_register(dev, &mipi_tx->pll_hw);
> if (IS_ERR(mipi_tx->pll)) {
> @@ -465,20 +193,14 @@ static int mtk_mipi_tx_remove(struct platform_device *pdev)
> return 0;
> }
>
> -static const struct mtk_mipitx_data mt2701_mipitx_data = {
> - .mppll_preserve = (3 << 8)
> -};
> -
> -static const struct mtk_mipitx_data mt8173_mipitx_data = {
> - .mppll_preserve = (0 << 8)
> -};
> -
> static const struct of_device_id mtk_mipi_tx_match[] = {
> { .compatible = "mediatek,mt2701-mipi-tx",
> .data = &mt2701_mipitx_data },
> { .compatible = "mediatek,mt8173-mipi-tx",
> .data = &mt8173_mipitx_data },
> - {},
> + { .compatible = "mediatek,mt8183-mipi-tx",
> + .data = &mt8183_mipitx_data },
> + { },
> };
>
> struct platform_driver mtk_mipi_tx_driver = {
> diff --git a/drivers/gpu/drm/mediatek/mtk_mipi_tx.h b/drivers/gpu/drm/mediatek/mtk_mipi_tx.h
> new file mode 100644
> index 000000000000..af83023e81cf
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_mipi_tx.h
> @@ -0,0 +1,52 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2019 MediaTek Inc.
> + * Author: Jitao Shi <jitao.shi@...iatek.com>
> + */
> +
> +#ifndef _MTK_MIPI_TX_H
> +#define _MTK_MIPI_TX_H
> +
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/phy/phy.h>
> +
> +struct mtk_mipitx_data {
> + const u32 mppll_preserve;
> + const struct clk_ops *mipi_tx_clk_ops;
> + void (*mipi_tx_enable_signal)(struct phy *phy);
> + void (*mipi_tx_disable_signal)(struct phy *phy);
> +};
> +
> +struct mtk_mipi_tx {
> + struct device *dev;
> + void __iomem *regs;
> + u32 data_rate;
> + struct clk *ref_clk;
> + const struct mtk_mipitx_data *driver_data;
> + struct clk_hw pll_hw;
> + struct clk *pll;
> +};
> +
> +struct mtk_mipi_tx *mtk_mipi_tx_from_clk_hw(struct clk_hw *hw);
> +void mtk_mipi_tx_clear_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, u32 bits);
> +void mtk_mipi_tx_set_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, u32 bits);
> +void mtk_mipi_tx_update_bits(struct mtk_mipi_tx *mipi_tx, u32 offset, u32 mask,
> + u32 data);
> +long mtk_mipi_tx_pll_round_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long *prate);
> +int mtk_mipi_tx_pll_set_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long parent_rate);
> +unsigned long mtk_mipi_tx_pll_recalc_rate(struct clk_hw *hw,
> + unsigned long parent_rate);
> +
> +extern const struct mtk_mipitx_data mt2701_mipitx_data;
> +extern const struct mtk_mipitx_data mt8173_mipitx_data;
> +extern const struct mtk_mipitx_data mt8183_mipitx_data;
> +
> +#endif
> diff --git a/drivers/gpu/drm/mediatek/mtk_mt8173_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mt8173_mipi_tx.c
> new file mode 100644
> index 000000000000..8e57cdf85b06
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_mt8173_mipi_tx.c
> @@ -0,0 +1,290 @@
> +/*
> + * Copyright (c) 2015 MediaTek Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include "mtk_mipi_tx.h"
> +
> +#define MIPITX_DSI_CON 0x00
> +#define RG_DSI_LDOCORE_EN BIT(0)
> +#define RG_DSI_CKG_LDOOUT_EN BIT(1)
> +#define RG_DSI_BCLK_SEL (3 << 2)
> +#define RG_DSI_LD_IDX_SEL (7 << 4)
> +#define RG_DSI_PHYCLK_SEL (2 << 8)
> +#define RG_DSI_DSICLK_FREQ_SEL BIT(10)
> +#define RG_DSI_LPTX_CLMP_EN BIT(11)
> +
> +#define MIPITX_DSI_CLOCK_LANE 0x04
> +#define MIPITX_DSI_DATA_LANE0 0x08
> +#define MIPITX_DSI_DATA_LANE1 0x0c
> +#define MIPITX_DSI_DATA_LANE2 0x10
> +#define MIPITX_DSI_DATA_LANE3 0x14
> +#define RG_DSI_LNTx_LDOOUT_EN BIT(0)
> +#define RG_DSI_LNTx_CKLANE_EN BIT(1)
> +#define RG_DSI_LNTx_LPTX_IPLUS1 BIT(2)
> +#define RG_DSI_LNTx_LPTX_IPLUS2 BIT(3)
> +#define RG_DSI_LNTx_LPTX_IMINUS BIT(4)
> +#define RG_DSI_LNTx_LPCD_IPLUS BIT(5)
> +#define RG_DSI_LNTx_LPCD_IMINUS BIT(6)
> +#define RG_DSI_LNTx_RT_CODE (0xf << 8)
> +
> +#define MIPITX_DSI_TOP_CON 0x40
> +#define RG_DSI_LNT_INTR_EN BIT(0)
> +#define RG_DSI_LNT_HS_BIAS_EN BIT(1)
> +#define RG_DSI_LNT_IMP_CAL_EN BIT(2)
> +#define RG_DSI_LNT_TESTMODE_EN BIT(3)
> +#define RG_DSI_LNT_IMP_CAL_CODE (0xf << 4)
> +#define RG_DSI_LNT_AIO_SEL (7 << 8)
> +#define RG_DSI_PAD_TIE_LOW_EN BIT(11)
> +#define RG_DSI_DEBUG_INPUT_EN BIT(12)
> +#define RG_DSI_PRESERVE (7 << 13)
> +
> +#define MIPITX_DSI_BG_CON 0x44
> +#define RG_DSI_BG_CORE_EN BIT(0)
> +#define RG_DSI_BG_CKEN BIT(1)
> +#define RG_DSI_BG_DIV (0x3 << 2)
> +#define RG_DSI_BG_FAST_CHARGE BIT(4)
> +#define RG_DSI_VOUT_MSK (0x3ffff << 5)
> +#define RG_DSI_V12_SEL (7 << 5)
> +#define RG_DSI_V10_SEL (7 << 8)
> +#define RG_DSI_V072_SEL (7 << 11)
> +#define RG_DSI_V04_SEL (7 << 14)
> +#define RG_DSI_V032_SEL (7 << 17)
> +#define RG_DSI_V02_SEL (7 << 20)
> +#define RG_DSI_BG_R1_TRIM (0xf << 24)
> +#define RG_DSI_BG_R2_TRIM (0xf << 28)
> +
> +#define MIPITX_DSI_PLL_CON0 0x50
> +#define RG_DSI_MPPLL_PLL_EN BIT(0)
> +#define RG_DSI_MPPLL_DIV_MSK (0x1ff << 1)
> +#define RG_DSI_MPPLL_PREDIV (3 << 1)
> +#define RG_DSI_MPPLL_TXDIV0 (3 << 3)
> +#define RG_DSI_MPPLL_TXDIV1 (3 << 5)
> +#define RG_DSI_MPPLL_POSDIV (7 << 7)
> +#define RG_DSI_MPPLL_MONVC_EN BIT(10)
> +#define RG_DSI_MPPLL_MONREF_EN BIT(11)
> +#define RG_DSI_MPPLL_VOD_EN BIT(12)
> +
> +#define MIPITX_DSI_PLL_CON1 0x54
> +#define RG_DSI_MPPLL_SDM_FRA_EN BIT(0)
> +#define RG_DSI_MPPLL_SDM_SSC_PH_INIT BIT(1)
> +#define RG_DSI_MPPLL_SDM_SSC_EN BIT(2)
> +#define RG_DSI_MPPLL_SDM_SSC_PRD (0xffff << 16)
> +
> +#define MIPITX_DSI_PLL_CON2 0x58
> +
> +#define MIPITX_DSI_PLL_TOP 0x64
> +#define RG_DSI_MPPLL_PRESERVE (0xff << 8)
> +
> +#define MIPITX_DSI_PLL_PWR 0x68
> +#define RG_DSI_MPPLL_SDM_PWR_ON BIT(0)
> +#define RG_DSI_MPPLL_SDM_ISO_EN BIT(1)
> +#define RG_DSI_MPPLL_SDM_PWR_ACK BIT(8)
> +
> +#define MIPITX_DSI_SW_CTRL 0x80
> +#define SW_CTRL_EN BIT(0)
> +
> +#define MIPITX_DSI_SW_CTRL_CON0 0x84
> +#define SW_LNTC_LPTX_PRE_OE BIT(0)
> +#define SW_LNTC_LPTX_OE BIT(1)
> +#define SW_LNTC_LPTX_P BIT(2)
> +#define SW_LNTC_LPTX_N BIT(3)
> +#define SW_LNTC_HSTX_PRE_OE BIT(4)
> +#define SW_LNTC_HSTX_OE BIT(5)
> +#define SW_LNTC_HSTX_ZEROCLK BIT(6)
> +#define SW_LNT0_LPTX_PRE_OE BIT(7)
> +#define SW_LNT0_LPTX_OE BIT(8)
> +#define SW_LNT0_LPTX_P BIT(9)
> +#define SW_LNT0_LPTX_N BIT(10)
> +#define SW_LNT0_HSTX_PRE_OE BIT(11)
> +#define SW_LNT0_HSTX_OE BIT(12)
> +#define SW_LNT0_LPRX_EN BIT(13)
> +#define SW_LNT1_LPTX_PRE_OE BIT(14)
> +#define SW_LNT1_LPTX_OE BIT(15)
> +#define SW_LNT1_LPTX_P BIT(16)
> +#define SW_LNT1_LPTX_N BIT(17)
> +#define SW_LNT1_HSTX_PRE_OE BIT(18)
> +#define SW_LNT1_HSTX_OE BIT(19)
> +#define SW_LNT2_LPTX_PRE_OE BIT(20)
> +#define SW_LNT2_LPTX_OE BIT(21)
> +#define SW_LNT2_LPTX_P BIT(22)
> +#define SW_LNT2_LPTX_N BIT(23)
> +#define SW_LNT2_HSTX_PRE_OE BIT(24)
> +#define SW_LNT2_HSTX_OE BIT(25)
> +
> +static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw)
> +{
> + struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
> + u8 txdiv, txdiv0, txdiv1;
> + u64 pcw;
> +
> + dev_dbg(mipi_tx->dev, "prepare: %u Hz\n", mipi_tx->data_rate);
> +
> + if (mipi_tx->data_rate >= 500000000) {
> + txdiv = 1;
> + txdiv0 = 0;
> + txdiv1 = 0;
> + } else if (mipi_tx->data_rate >= 250000000) {
> + txdiv = 2;
> + txdiv0 = 1;
> + txdiv1 = 0;
> + } else if (mipi_tx->data_rate >= 125000000) {
> + txdiv = 4;
> + txdiv0 = 2;
> + txdiv1 = 0;
> + } else if (mipi_tx->data_rate > 62000000) {
> + txdiv = 8;
> + txdiv0 = 2;
> + txdiv1 = 1;
> + } else if (mipi_tx->data_rate >= 50000000) {
> + txdiv = 16;
> + txdiv0 = 2;
> + txdiv1 = 2;
> + } else {
> + return -EINVAL;
> + }
> +
> + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_BG_CON,
> + RG_DSI_VOUT_MSK |
> + RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN,
> + (4 << 20) | (4 << 17) | (4 << 14) |
> + (4 << 11) | (4 << 8) | (4 << 5) |
> + RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
> +
> + usleep_range(30, 100);
> +
> + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> + RG_DSI_LNT_IMP_CAL_CODE | RG_DSI_LNT_HS_BIAS_EN,
> + (8 << 4) | RG_DSI_LNT_HS_BIAS_EN);
> +
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_CON,
> + RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
> +
> + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
> + RG_DSI_MPPLL_SDM_PWR_ON |
> + RG_DSI_MPPLL_SDM_ISO_EN,
> + RG_DSI_MPPLL_SDM_PWR_ON);
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> + RG_DSI_MPPLL_PLL_EN);
> +
> + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> + RG_DSI_MPPLL_TXDIV0 | RG_DSI_MPPLL_TXDIV1 |
> + RG_DSI_MPPLL_PREDIV,
> + (txdiv0 << 3) | (txdiv1 << 5));
> +
> + /*
> + * PLL PCW config
> + * PCW bit 24~30 = integer part of pcw
> + * PCW bit 0~23 = fractional part of pcw
> + * pcw = data_Rate*4*txdiv/(Ref_clk*2);
> + * Post DIV =4, so need data_Rate*4
> + * Ref_clk is 26MHz
> + */
> + pcw = div_u64(((u64)mipi_tx->data_rate * 2 * txdiv) << 24,
> + 26000000);
> + writel(pcw, mipi_tx->regs + MIPITX_DSI_PLL_CON2);
> +
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
> + RG_DSI_MPPLL_SDM_FRA_EN);
> +
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_PLL_CON0, RG_DSI_MPPLL_PLL_EN);
> +
> + usleep_range(20, 100);
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON1,
> + RG_DSI_MPPLL_SDM_SSC_EN);
> +
> + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
> + RG_DSI_MPPLL_PRESERVE,
> + mipi_tx->driver_data->mppll_preserve);
> +
> + return 0;
> +}
> +
> +static void mtk_mipi_tx_pll_unprepare(struct clk_hw *hw)
> +{
> + struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
> +
> + dev_dbg(mipi_tx->dev, "unprepare\n");
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> + RG_DSI_MPPLL_PLL_EN);
> +
> + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_TOP,
> + RG_DSI_MPPLL_PRESERVE, 0);
> +
> + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_DSI_PLL_PWR,
> + RG_DSI_MPPLL_SDM_ISO_EN |
> + RG_DSI_MPPLL_SDM_PWR_ON,
> + RG_DSI_MPPLL_SDM_ISO_EN);
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> + RG_DSI_LNT_HS_BIAS_EN);
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_CON,
> + RG_DSI_CKG_LDOOUT_EN | RG_DSI_LDOCORE_EN);
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_BG_CON,
> + RG_DSI_BG_CKEN | RG_DSI_BG_CORE_EN);
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_PLL_CON0,
> + RG_DSI_MPPLL_DIV_MSK);
> +}
> +
> +static const struct clk_ops mtk_mipi_tx_pll_ops = {
> + .prepare = mtk_mipi_tx_pll_prepare,
> + .unprepare = mtk_mipi_tx_pll_unprepare,
> + .round_rate = mtk_mipi_tx_pll_round_rate,
> + .set_rate = mtk_mipi_tx_pll_set_rate,
> + .recalc_rate = mtk_mipi_tx_pll_recalc_rate,
> +};
> +
> +static void mtk_mipi_tx_power_on_signal(struct phy *phy)
> +{
> + struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
> + u32 reg;
> +
> + for (reg = MIPITX_DSI_CLOCK_LANE;
> + reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
> + mtk_mipi_tx_set_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> + RG_DSI_PAD_TIE_LOW_EN);
> +}
> +
> +static void mtk_mipi_tx_power_off_signal(struct phy *phy)
> +{
> + struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
> + u32 reg;
> +
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_DSI_TOP_CON,
> + RG_DSI_PAD_TIE_LOW_EN);
> +
> + for (reg = MIPITX_DSI_CLOCK_LANE;
> + reg <= MIPITX_DSI_DATA_LANE3; reg += 4)
> + mtk_mipi_tx_clear_bits(mipi_tx, reg, RG_DSI_LNTx_LDOOUT_EN);
> +}
> +
> +const struct mtk_mipitx_data mt2701_mipitx_data = {
> + .mppll_preserve = (3 << 8),
> + .mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
> + .mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
> + .mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,
> +};
> +
> +const struct mtk_mipitx_data mt8173_mipitx_data = {
> + .mppll_preserve = (0 << 8),
> + .mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
> + .mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
> + .mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,
> +};
> +
> diff --git a/drivers/gpu/drm/mediatek/mtk_mt8183_mipi_tx.c b/drivers/gpu/drm/mediatek/mtk_mt8183_mipi_tx.c
> new file mode 100644
> index 000000000000..07f70a3cad13
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_mt8183_mipi_tx.c
> @@ -0,0 +1,168 @@
> +/*
> + * Copyright (c) 2015 MediaTek Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include "mtk_mipi_tx.h"
> +
> +#define MIPITX_LANE_CON 0x000c
> +#define RG_DSI_CPHY_T1DRV_EN BIT(0)
> +#define RG_DSI_ANA_CK_SEL BIT(1)
> +#define RG_DSI_PHY_CK_SEL BIT(2)
> +#define RG_DSI_CPHY_EN BIT(3)
> +#define RG_DSI_PHYCK_INV_EN BIT(4)
> +#define RG_DSI_PWR04_EN BIT(5)
> +#define RG_DSI_BG_LPF_EN BIT(6)
> +#define RG_DSI_BG_CORE_EN BIT(7)
> +#define RG_DSI_PAD_TIEL_SEL BIT(8)
> +
> +#define MIPITX_PLL_PWR 0x0028
> +#define MIPITX_PLL_CON0 0x002c
> +#define MIPITX_PLL_CON1 0x0030
> +#define MIPITX_PLL_CON2 0x0034
> +#define MIPITX_PLL_CON3 0x0038
> +#define MIPITX_PLL_CON4 0x003c
> +#define RG_DSI_PLL_IBIAS (3 << 10)
> +
> +#define MIPITX_D2_SW_CTL_EN 0x0144
> +#define MIPITX_D0_SW_CTL_EN 0x0244
> +#define MIPITX_CK_CKMODE_EN 0x0328
> +#define DSI_CK_CKMODE_EN BIT(0)
> +#define MIPITX_CK_SW_CTL_EN 0x0344
> +#define MIPITX_D1_SW_CTL_EN 0x0444
> +#define MIPITX_D3_SW_CTL_EN 0x0544
> +#define DSI_SW_CTL_EN BIT(0)
> +#define AD_DSI_PLL_SDM_PWR_ON BIT(0)
> +#define AD_DSI_PLL_SDM_ISO_EN BIT(1)
> +
> +#define RG_DSI_PLL_EN BIT(4)
> +#define RG_DSI_PLL_POSDIV (0x7 << 8)
> +
> +static int mtk_mipi_tx_pll_prepare(struct clk_hw *hw)
> +{
> + struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
> + unsigned int txdiv, txdiv0, txdiv1;
> + u64 pcw;
> + int ret;
> +
> + dev_dbg(mipi_tx->dev, "prepare: %u bps\n", mipi_tx->data_rate);
> +
> + if (mipi_tx->data_rate >= 2000000000) {
> + txdiv = 1;
> + txdiv0 = 0;
> + txdiv1 = 0;
> + } else if (mipi_tx->data_rate >= 1000000000) {
> + txdiv = 2;
> + txdiv0 = 1;
> + txdiv1 = 0;
> + } else if (mipi_tx->data_rate >= 500000000) {
> + txdiv = 4;
> + txdiv0 = 2;
> + txdiv1 = 0;
> + } else if (mipi_tx->data_rate > 250000000) {
> + txdiv = 8;
> + txdiv0 = 3;
> + txdiv1 = 0;
> + } else if (mipi_tx->data_rate >= 125000000) {
> + txdiv = 16;
> + txdiv0 = 4;
> + txdiv1 = 0;
> + } else {
> + return -EINVAL;
> + }
> +
> + ret = clk_prepare_enable(mipi_tx->ref_clk);
> + if (ret < 0) {
> + dev_err(mipi_tx->dev, "can't mipi_tx ref_clk %d\n", ret);
> + return ret;
> + }
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON4, RG_DSI_PLL_IBIAS);
> +
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_PWR_ON);
> + usleep_range(30, 100);
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_ISO_EN);
> + pcw = div_u64(((u64)mipi_tx->data_rate * txdiv) << 24, 26000000);
> + writel(pcw, mipi_tx->regs + MIPITX_PLL_CON0);
> + mtk_mipi_tx_update_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_POSDIV,
> + txdiv0 << 8);
> + usleep_range(1000, 2000);
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);
> +
> + return 0;
> +}
> +
> +static void mtk_mipi_tx_pll_unprepare(struct clk_hw *hw)
> +{
> + struct mtk_mipi_tx *mipi_tx = mtk_mipi_tx_from_clk_hw(hw);
> +
> + dev_dbg(mipi_tx->dev, "unprepare\n");
> +
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_CON1, RG_DSI_PLL_EN);
> + /* step 1: SDM_RWR_ON / SDM_ISO_EN */
> +
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_ISO_EN);
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_PLL_PWR, AD_DSI_PLL_SDM_PWR_ON);
> + clk_disable_unprepare(mipi_tx->ref_clk);
> +}
> +
> +static const struct clk_ops mtk_mipi_tx_pll_ops = {
> + .prepare = mtk_mipi_tx_pll_prepare,
> + .unprepare = mtk_mipi_tx_pll_unprepare,
> + .round_rate = mtk_mipi_tx_pll_round_rate,
> + .set_rate = mtk_mipi_tx_pll_set_rate,
> + .recalc_rate = mtk_mipi_tx_pll_recalc_rate,
> +};
> +
> +static void mtk_mipi_tx_power_on_signal(struct phy *phy)
> +{
> + struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
> +
> + /* BG_LPF_EN / BG_CORE_EN */
> + writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN,
> + mipi_tx->regs + MIPITX_LANE_CON);
> + usleep_range(30, 100);
> + writel(RG_DSI_BG_CORE_EN | RG_DSI_BG_LPF_EN,
> + mipi_tx->regs + MIPITX_LANE_CON);
> +
> + /* Switch OFF each Lane */
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D0_SW_CTL_EN, DSI_SW_CTL_EN);
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D1_SW_CTL_EN, DSI_SW_CTL_EN);
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D2_SW_CTL_EN, DSI_SW_CTL_EN);
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_D3_SW_CTL_EN, DSI_SW_CTL_EN);
> + mtk_mipi_tx_clear_bits(mipi_tx, MIPITX_CK_SW_CTL_EN, DSI_SW_CTL_EN);
> +
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_CK_CKMODE_EN, DSI_CK_CKMODE_EN);
> +}
> +
> +static void mtk_mipi_tx_power_off_signal(struct phy *phy)
> +{
> + struct mtk_mipi_tx *mipi_tx = phy_get_drvdata(phy);
> +
> + /* Switch ON each Lane */
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D0_SW_CTL_EN, DSI_SW_CTL_EN);
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D1_SW_CTL_EN, DSI_SW_CTL_EN);
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D2_SW_CTL_EN, DSI_SW_CTL_EN);
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_D3_SW_CTL_EN, DSI_SW_CTL_EN);
> + mtk_mipi_tx_set_bits(mipi_tx, MIPITX_CK_SW_CTL_EN, DSI_SW_CTL_EN);
> +
> + /* step 2 */
> + writel(RG_DSI_PAD_TIEL_SEL | RG_DSI_BG_CORE_EN,
> + mipi_tx->regs + MIPITX_LANE_CON);
> + writel(RG_DSI_PAD_TIEL_SEL, mipi_tx->regs + MIPITX_LANE_CON);
> +}
> +
> +const struct mtk_mipitx_data mt8183_mipitx_data = {
> + .mipi_tx_clk_ops = &mtk_mipi_tx_pll_ops,
> + .mipi_tx_enable_signal = mtk_mipi_tx_power_on_signal,
> + .mipi_tx_disable_signal = mtk_mipi_tx_power_off_signal,
> +};
> +
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