[EXT] Re: [PATCH v6 8/8] phy: freescale: Add HDMI PHY driver for i.MX8MQ
Sandor Yu
sandor.yu at nxp.com
Mon Jul 10 00:30:23 PDT 2023
Hi Vinod,
Thanks for your comments,
> -----Original Message-----
> From: Vinod Koul <vkoul at kernel.org>
> Sent: 2023年6月21日 19:58
> To: Sandor Yu <sandor.yu at nxp.com>
> Cc: andrzej.hajda at intel.com; neil.armstrong at linaro.org;
> robert.foss at linaro.org; Laurent.pinchart at ideasonboard.com;
> jonas at kwiboo.se; jernej.skrabec at gmail.com; airlied at gmail.com;
> daniel at ffwll.ch; robh+dt at kernel.org; krzysztof.kozlowski+dt at linaro.org;
> shawnguo at kernel.org; s.hauer at pengutronix.de; festevam at gmail.com;
> dri-devel at lists.freedesktop.org; devicetree at vger.kernel.org;
> linux-arm-kernel at lists.infradead.org; linux-kernel at vger.kernel.org;
> linux-phy at lists.infradead.org; kernel at pengutronix.de; dl-linux-imx
> <linux-imx at nxp.com>; Oliver Brown <oliver.brown at nxp.com>
> Subject: [EXT] Re: [PATCH v6 8/8] phy: freescale: Add HDMI PHY driver for
> i.MX8MQ
>
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>
> On 15-06-23, 09:38, Sandor Yu wrote:
> > Add Cadence HDP-TX HDMI PHY driver for i.MX8MQ.
> >
> > Cadence HDP-TX PHY could be put in either DP mode or HDMI mode base
> on
> > the configuration chosen.
> > HDMI PHY mode is configurated in the driver.
> >
> > Signed-off-by: Sandor Yu <Sandor.yu at nxp.com>
> > ---
> > drivers/phy/freescale/Kconfig | 9 +
> > drivers/phy/freescale/Makefile | 1 +
> > drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c | 889
> > ++++++++++++++++++++
> > 3 files changed, 899 insertions(+)
> > create mode 100644 drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> >
> > diff --git a/drivers/phy/freescale/Kconfig
> > b/drivers/phy/freescale/Kconfig index a99ee370eda6..e007e15e503a
> > 100644
> > --- a/drivers/phy/freescale/Kconfig
> > +++ b/drivers/phy/freescale/Kconfig
> > @@ -44,6 +44,15 @@ config PHY_CADENCE_DP_PHY
> > Enable this to support the Cadence HDPTX DP PHY driver
> > on NXP's i.MX8MQ SOC.
> >
> > +config PHY_CADENCE_HDMI_PHY
> > + tristate "Cadence HDPTX HDMI PHY Driver"
> > + depends on OF && HAS_IOMEM
> > + depends on COMMON_CLK
> > + select GENERIC_PHY
> > + help
> > + Enable this to support the Cadence HDPTX HDMI PHY driver.
> > + on NXP's i.MX8MQ SOC.
> > +
> > endif
> >
> > config PHY_FSL_LYNX_28G
> > diff --git a/drivers/phy/freescale/Makefile
> > b/drivers/phy/freescale/Makefile index c3bdf3fa2e72..d25fafd91c53
> > 100644
> > --- a/drivers/phy/freescale/Makefile
> > +++ b/drivers/phy/freescale/Makefile
> > @@ -5,3 +5,4 @@ obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) +=
> phy-fsl-imx8-mipi-dphy.o
> > obj-$(CONFIG_PHY_FSL_IMX8M_PCIE) += phy-fsl-imx8m-pcie.o
> > obj-$(CONFIG_PHY_FSL_LYNX_28G) +=
> phy-fsl-lynx-28g.o
> > obj-$(CONFIG_PHY_CADENCE_DP_PHY) += phy-fsl-imx8mq-dp.o
> > +obj-$(CONFIG_PHY_CADENCE_HDMI_PHY) += phy-fsl-imx8mq-hdmi.o
>
> Pls sort alphabetically (both Kconfig and Makefile)
OK, and the name will be change to CONFIG_PHY_FSL_IMX8MQ_HDMI_PHY and CONFIG_PHY_FSL_IMX8MQ_DP_PHY.
in the next version.
>
>
> > diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> > b/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> > new file mode 100644
> > index 000000000000..65aeb9835bb9
> > --- /dev/null
> > +++ b/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> > @@ -0,0 +1,889 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Cadence High-Definition Multimedia Interface (HDMI) PHY driver
> > + *
> > + * Copyright (C) 2022 NXP Semiconductor, Inc.
> > + */
> > +#include <asm/unaligned.h>
> > +#include <linux/clk.h>
> > +#include <linux/kernel.h>
> > +#include <linux/phy/phy.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/io.h>
> > +
> > +#include <drm/bridge/cdns-mhdp-mailbox.h>
> > +
> > +#define ADDR_PHY_AFE 0x80000
> > +/* PHY registers */
> > +#define CMN_SSM_BIAS_TMR 0x0022
> > +#define CMN_PLLSM0_USER_DEF_CTRL 0x002F
> > +#define CMN_PSM_CLK_CTRL 0x0061
> > +#define CMN_CDIAG_REFCLK_CTRL 0x0062
> > +#define CMN_PLL0_VCOCAL_START 0x0081
> > +#define CMN_PLL0_VCOCAL_INIT_TMR 0x0084
> > +#define CMN_PLL0_VCOCAL_ITER_TMR 0x0085
> > +#define CMN_TXPUCAL_CTRL 0x00E0
> > +#define CMN_TXPDCAL_CTRL 0x00F0
> > +#define CMN_TXPU_ADJ_CTRL 0x0108
> > +#define CMN_TXPD_ADJ_CTRL 0x010c
> > +#define CMN_DIAG_PLL0_FBH_OVRD 0x01C0
> > +#define CMN_DIAG_PLL0_FBL_OVRD 0x01C1
> > +#define CMN_DIAG_PLL0_OVRD 0x01C2
> > +#define CMN_DIAG_PLL0_TEST_MODE 0x01C4
> > +#define CMN_DIAG_PLL0_V2I_TUNE 0x01C5
> > +#define CMN_DIAG_PLL0_CP_TUNE 0x01C6
> > +#define CMN_DIAG_PLL0_LF_PROG 0x01C7
> > +#define CMN_DIAG_PLL0_PTATIS_TUNE1 0x01C8
> > +#define CMN_DIAG_PLL0_PTATIS_TUNE2 0x01C9
> > +#define CMN_DIAG_PLL0_INCLK_CTRL 0x01CA
> > +#define CMN_DIAG_PLL0_PXL_DIVH 0x01CB
> > +#define CMN_DIAG_PLL0_PXL_DIVL 0x01CC
> > +#define CMN_DIAG_HSCLK_SEL 0x01E0
> > +#define XCVR_PSM_RCTRL 0x4001
> > +#define TX_TXCC_CAL_SCLR_MULT_0 0x4047
> > +#define TX_TXCC_CPOST_MULT_00_0 0x404C
> > +#define XCVR_DIAG_PLLDRC_CTRL 0x40E0
> > +#define XCVR_DIAG_PLLDRC_CTRL 0x40E0
> > +#define XCVR_DIAG_HSCLK_SEL 0x40E1
> > +#define XCVR_DIAG_BIDI_CTRL 0x40E8
> > +#define TX_PSC_A0 0x4100
> > +#define TX_PSC_A1 0x4101
> > +#define TX_PSC_A2 0x4102
> > +#define TX_PSC_A3 0x4103
> > +#define TX_DIAG_TX_CTRL 0x41E0
> > +#define TX_DIAG_TX_DRV 0x41E1
> > +#define TX_DIAG_BGREF_PREDRV_DELAY 0x41E7
> > +#define TX_DIAG_ACYA_0 0x41FF
> > +#define TX_DIAG_ACYA_1 0x43FF
> > +#define TX_DIAG_ACYA_2 0x45FF
> > +#define TX_DIAG_ACYA_3 0x47FF
> > +#define TX_ANA_CTRL_REG_1 0x5020
> > +#define TX_ANA_CTRL_REG_2 0x5021
> > +#define TX_DIG_CTRL_REG_2 0x5024
> > +#define TXDA_CYA_AUXDA_CYA 0x5025
> > +#define TX_ANA_CTRL_REG_3 0x5026
> > +#define TX_ANA_CTRL_REG_4 0x5027
> > +#define TX_ANA_CTRL_REG_5 0x5029
> > +#define RX_PSC_A0 0x8000
> > +#define RX_PSC_CAL 0x8006
> > +#define PHY_HDP_MODE_CTRL 0xC008
> > +#define PHY_HDP_CLK_CTL 0xC009
> > +#define PHY_ISO_CMN_CTRL 0xC010
> > +#define PHY_PMA_CMN_CTRL1 0xC800
> > +#define PHY_PMA_ISO_CMN_CTRL 0xC810
> > +#define PHY_PMA_ISO_PLL_CTRL1 0xC812
> > +#define PHY_PMA_ISOLATION_CTRL 0xC81F
> > +
> > +#define REF_CLK_27MHZ 27000000
>
> This looks similar to patch 7, how different are these two..?
In fact, patch 8 and patch 7 are the same IP, but run the different firmware.
HDMI PHY and DP PHY are share less registers, and totally different PLL work mode.
Use separate driver for HDMI and DP PHY is easy to maintain the source code.
>
> > +
> > +/* HDMI TX clock control settings */
> > +struct hdptx_hdmi_ctrl {
> > + u32 pixel_clk_freq_min;
> > + u32 pixel_clk_freq_max;
> > + u32 feedback_factor;
> > + u32 data_range_kbps_min;
> > + u32 data_range_kbps_max;
> > + u32 cmnda_pll0_ip_div;
> > + u32 cmn_ref_clk_dig_div;
> > + u32 ref_clk_divider_scaler;
> > + u32 pll_fb_div_total;
> > + u32 cmnda_pll0_fb_div_low;
> > + u32 cmnda_pll0_fb_div_high;
> > + u32 pixel_div_total;
> > + u32 cmnda_pll0_pxdiv_low;
> > + u32 cmnda_pll0_pxdiv_high;
> > + u32 vco_freq_min;
> > + u32 vco_freq_max;
> > + u32 vco_ring_select;
> > + u32 cmnda_hs_clk_0_sel;
> > + u32 cmnda_hs_clk_1_sel;
> > + u32 hsclk_div_at_xcvr;
> > + u32 hsclk_div_tx_sub_rate;
> > + u32 cmnda_pll0_hs_sym_div_sel;
> > + u32 cmnda_pll0_clk_freq_min;
> > + u32 cmnda_pll0_clk_freq_max;
> > +};
> > +
> > +struct cdns_hdptx_hdmi_phy {
> > + void __iomem *regs; /* DPTX registers base */
> > + struct mutex mbox_mutex; /* mutex to protect mailbox */
> > + struct device *dev;
> > + struct phy *phy;
> > + struct clk *ref_clk, *apb_clk;
> > + u32 ref_clk_rate;
> > + u32 pixel_clk_rate;
> > + enum hdmi_phy_colorspace color_space;
> > + u32 bpc;
> > +};
> > +
> > +/* HDMI TX clock control settings, pixel clock is output */ static
> > +const struct hdptx_hdmi_ctrl pixel_clk_output_ctrl_table[] = {
> > +/*Minclk Maxclk Fdbak DR_min DR_max ip_d dig DS Totl
> */
> > +{ 27000, 27000, 1000, 270000, 270000, 0x03, 0x1, 0x1, 240, 0x0BC,
> > +0x030, 80, 0x026, 0x026, 2160000, 2160000, 0, 2, 2, 2, 4, 0x3,
> > +27000, 27000}, { 27000, 27000, 1250, 337500, 337500, 0x03, 0x1,
> > +0x1, 300, 0x0EC, 0x03C, 100, 0x030, 0x030, 2700000, 2700000, 0, 2,
> > +2, 2, 4, 0x3, 33750, 33750}, { 27000, 27000, 1500, 405000,
> > +405000, 0x03, 0x1, 0x1, 360, 0x11C, 0x048, 120, 0x03A, 0x03A,
> > +3240000, 3240000, 0, 2, 2, 2, 4, 0x3, 40500, 40500}, { 27000,
> > +27000, 2000, 540000, 540000, 0x03, 0x1, 0x1, 240, 0x0BC, 0x030,
> > +80, 0x026, 0x026, 2160000, 2160000, 0, 2, 2, 2, 4, 0x2, 54000,
> > +54000}, { 54000, 54000, 1000, 540000, 540000, 0x03, 0x1, 0x1,
> > +480, 0x17C, 0x060, 80, 0x026, 0x026, 4320000, 4320000, 1, 2, 2, 2,
> > +4, 0x3, 54000, 54000}, { 54000, 54000, 1250, 675000, 675000,
> > +0x04, 0x1, 0x1, 400, 0x13C, 0x050, 50, 0x017, 0x017, 2700000,
> > +2700000, 0, 1, 1, 2, 4, 0x2, 67500, 67500}, { 54000, 54000, 1500,
> > +810000, 810000, 0x04, 0x1, 0x1, 480, 0x17C, 0x060, 60, 0x01C,
> > +0x01C, 3240000, 3240000, 0, 2, 2, 2, 2, 0x2, 81000, 81000}, {
> > +54000, 54000, 2000, 1080000, 1080000, 0x03, 0x1, 0x1, 240, 0x0BC,
> > +0x030, 40, 0x012, 0x012, 2160000, 2160000, 0, 2, 2, 2, 1, 0x1,
> > +108000, 108000}, { 74250, 74250, 1000, 742500, 742500, 0x03, 0x1,
> > +0x1, 660, 0x20C, 0x084, 80, 0x026, 0x026, 5940000, 5940000, 1, 2,
> > +2, 2, 4, 0x3, 74250, 74250}, { 74250, 74250, 1250, 928125,
> > +928125, 0x04, 0x1, 0x1, 550, 0x1B4, 0x06E, 50, 0x017, 0x017,
> > +3712500, 3712500, 1, 1, 1, 2, 4, 0x2, 92812, 92812}, { 74250,
> > +74250, 1500, 1113750, 1113750, 0x04, 0x1, 0x1, 660, 0x20C, 0x084,
> > +60, 0x01C, 0x01C, 4455000, 4455000, 1, 2, 2, 2, 2, 0x2, 111375,
> > +111375}, { 74250, 74250, 2000, 1485000, 1485000, 0x03, 0x1, 0x1,
> > +330, 0x104, 0x042, 40, 0x012, 0x012, 2970000, 2970000, 0, 2, 2, 2,
> > +1, 0x1, 148500, 148500}, { 99000, 99000, 1000, 990000, 990000,
> > +0x03, 0x1, 0x1, 440, 0x15C, 0x058, 40, 0x012, 0x012, 3960000,
> > +3960000, 1, 2, 2, 2, 2, 0x2, 99000, 99000}, { 99000, 99000, 1250,
> > +1237500, 1237500, 0x03, 0x1, 0x1, 275, 0x0D8, 0x037, 25, 0x00B,
> > +0x00A, 2475000, 2475000, 0, 1, 1, 2, 2, 0x1, 123750, 123750}, {
> > +99000, 99000, 1500, 1485000, 1485000, 0x03, 0x1, 0x1, 330, 0x104,
> > +0x042, 30, 0x00D, 0x00D, 2970000, 2970000, 0, 2, 2, 2, 1, 0x1,
> > +148500, 148500}, { 99000, 99000, 2000, 1980000, 1980000, 0x03, 0x1,
> > +0x1, 440, 0x15C, 0x058, 40, 0x012, 0x012, 3960000, 3960000, 1, 2,
> > +2, 2, 1, 0x1, 198000, 198000}, {148500, 148500, 1000, 1485000,
> > +1485000, 0x03, 0x1, 0x1, 660, 0x20C, 0x084, 40, 0x012, 0x012,
> > +5940000, 5940000, 1, 2, 2, 2, 2, 0x2, 148500, 148500}, {148500,
> > +148500, 1250, 1856250, 1856250, 0x04, 0x1, 0x1, 550, 0x1B4, 0x06E,
> > +25, 0x00B, 0x00A, 3712500, 3712500, 1, 1, 1, 2, 2, 0x1, 185625,
> > +185625}, {148500, 148500, 1500, 2227500, 2227500, 0x03, 0x1, 0x1,
> > +495, 0x188, 0x063, 30, 0x00D, 0x00D, 4455000, 4455000, 1, 1, 1, 2,
> > +2, 0x1, 222750, 222750}, {148500, 148500, 2000, 2970000, 2970000,
> > +0x03, 0x1, 0x1, 660, 0x20C, 0x084, 40, 0x012, 0x012, 5940000,
> > +5940000, 1, 2, 2, 2, 1, 0x1, 297000, 297000}, {198000, 198000, 1000,
> > +1980000, 1980000, 0x03, 0x1, 0x1, 220, 0x0AC, 0x02C, 10, 0x003,
> > +0x003, 1980000, 1980000, 0, 1, 1, 2, 1, 0x0, 198000, 198000},
> > +{198000, 198000, 1250, 2475000, 2475000, 0x03, 0x1, 0x1, 550, 0x1B4,
> > +0x06E, 25, 0x00B, 0x00A, 4950000, 4950000, 1, 1, 1, 2, 2, 0x1,
> > +247500, 247500}, {198000, 198000, 1500, 2970000, 2970000, 0x03, 0x1,
> > +0x1, 330, 0x104, 0x042, 15, 0x006, 0x005, 2970000, 2970000, 0, 1,
> > +1, 2, 1, 0x0, 297000, 297000}, {198000, 198000, 2000, 3960000,
> > +3960000, 0x03, 0x1, 0x1, 440, 0x15C, 0x058, 20, 0x008, 0x008,
> > +3960000, 3960000, 1, 1, 1, 2, 1, 0x0, 396000, 396000}, {297000,
> > +297000, 1000, 2970000, 2970000, 0x03, 0x1, 0x1, 330, 0x104, 0x042,
> > +10, 0x003, 0x003, 2970000, 2970000, 0, 1, 1, 2, 1, 0x0, 297000,
> > +297000}, {297000, 297000, 1500, 4455000, 4455000, 0x03, 0x1, 0x1,
> > +495, 0x188, 0x063, 15, 0x006, 0x005, 4455000, 4455000, 1, 1, 1, 2,
> > +1, 0x0, 445500, 445500}, {297000, 297000, 2000, 5940000, 5940000,
> > +0x03, 0x1, 0x1, 660, 0x20C, 0x084, 20, 0x008, 0x008, 5940000,
> > +5940000, 1, 1, 1, 2, 1, 0x0, 594000, 594000}, {594000, 594000, 1000,
> > +5940000, 5940000, 0x03, 0x1, 0x1, 660, 0x20C, 0x084, 10, 0x003,
> > +0x003, 5940000, 5940000, 1, 1, 1, 2, 1, 0x0, 594000, 594000},
> > +{594000, 594000, 750, 4455000, 4455000, 0x03, 0x1, 0x1, 495, 0x188,
> > +0x063, 10, 0x003, 0x003, 4455000, 4455000, 1, 1, 1, 2, 1, 0x0,
> > +445500, 445500}, {594000, 594000, 625, 3712500, 3712500, 0x04, 0x1,
> > +0x1, 550, 0x1B4, 0x06E, 10, 0x003, 0x003, 3712500, 3712500, 1, 1,
> > +1, 2, 1, 0x0, 371250, 371250}, {594000, 594000, 500, 2970000,
> > +2970000, 0x03, 0x1, 0x1, 660, 0x20C, 0x084, 10, 0x003, 0x003,
> > +5940000, 5940000, 1, 1, 1, 2, 2, 0x1, 297000, 297000}, };
> > +
> > +/* HDMI TX PLL tuning settings */
> > +struct hdptx_hdmi_pll_tuning {
> > + u32 vco_freq_bin;
> > + u32 vco_freq_min;
> > + u32 vco_freq_max;
> > + u32 volt_to_current_coarse;
> > + u32 volt_to_current;
> > + u32 ndac_ctrl;
> > + u32 pmos_ctrl;
> > + u32 ptat_ndac_ctrl;
> > + u32 feedback_div_total;
> > + u32 charge_pump_gain;
> > + u32 coarse_code;
> > + u32 v2i_code;
> > + u32 vco_cal_code;
> > +};
> > +
> > +/* HDMI TX PLL tuning settings, pixel clock is output */ static const
> > +struct hdptx_hdmi_pll_tuning pixel_clk_output_pll_table[] = { /*bin
> > +VCO_freq min/max coar cod NDAC PMOS PTAT div-T P-Gain Coa V2I
> CAL
> > +*/ { 1, 1980000, 1980000, 0x4, 0x3, 0x0, 0x09, 0x09, 220, 0x42, 160,
> > +5, 183 }, { 2, 2160000, 2160000, 0x4, 0x3, 0x0, 0x09, 0x09, 240,
> > +0x42, 166, 6, 208 }, { 3, 2475000, 2475000, 0x5, 0x3, 0x1, 0x00,
> > +0x07, 275, 0x42, 167, 6, 209 }, { 4, 2700000, 2700000, 0x5, 0x3,
> > +0x1, 0x00, 0x07, 300, 0x42, 188, 6, 230 }, { 4, 2700000, 2700000,
> > +0x5, 0x3, 0x1, 0x00, 0x07, 400, 0x4C, 188, 6, 230 }, { 5, 2970000,
> > +2970000, 0x6, 0x3, 0x1, 0x00, 0x07, 330, 0x42, 183, 6, 225 }, { 6,
> > +3240000, 3240000, 0x6, 0x3, 0x1, 0x00, 0x07, 360, 0x42, 203, 7, 256
> > +}, { 6, 3240000, 3240000, 0x6, 0x3, 0x1, 0x00, 0x07, 480, 0x4C, 203,
> > +7, 256 }, { 7, 3712500, 3712500, 0x4, 0x3, 0x0, 0x07, 0x0F, 550,
> > +0x4C, 212, 7, 257 }, { 8, 3960000, 3960000, 0x5, 0x3, 0x0, 0x07,
> > +0x0F, 440, 0x42, 184, 6, 226 }, { 9, 4320000, 4320000, 0x5, 0x3,
> > +0x1, 0x07, 0x0F, 480, 0x42, 205, 7, 258 }, { 10, 4455000, 4455000,
> > +0x5, 0x3, 0x0, 0x07, 0x0F, 495, 0x42, 219, 7, 272 }, { 10, 4455000,
> > +4455000, 0x5, 0x3, 0x0, 0x07, 0x0F, 660, 0x4C, 219, 7, 272 }, { 11,
> > +4950000, 4950000, 0x6, 0x3, 0x1, 0x00, 0x07, 550, 0x42, 213, 7, 258
> > +}, { 12, 5940000, 5940000, 0x7, 0x3, 0x1, 0x00, 0x07, 660, 0x42, 244,
> > +8, 292 }, };
> > +
> > +static int cdns_phy_reg_write(struct cdns_hdptx_hdmi_phy *cdns_phy,
> > +u32 addr, u32 val) {
> > + return cdns_mhdp_reg_write(cdns_phy, ADDR_PHY_AFE + (addr <<
> 2),
> > +val); }
> > +
> > +static u32 cdns_phy_reg_read(struct cdns_hdptx_hdmi_phy *cdns_phy,
> > +u32 addr) {
> > + u32 reg32;
> > +
> > + cdns_mhdp_reg_read(cdns_phy, ADDR_PHY_AFE + (addr << 2),
> > + ®32);
> > +
> > + return reg32;
> > +}
> > +
> > +#define KEEP_ALIVE 0x18
> > +static bool hdptx_phy_check_alive(struct cdns_hdptx_hdmi_phy
> > +*cdns_phy) {
> > + u32 alive, newalive;
> > + u8 retries_left = 50;
> > +
> > + alive = readl(cdns_phy->regs + KEEP_ALIVE);
> > +
> > + while (retries_left--) {
> > + udelay(2);
> > +
> > + newalive = readl(cdns_phy->regs + KEEP_ALIVE);
> > + if (alive == newalive)
> > + continue;
> > + return true;
> > + }
> > + return false;
> > +}
> > +
> > +static int hdptx_hdmi_clk_enable(struct cdns_hdptx_hdmi_phy
> > +*cdns_phy) {
> > + struct device *dev = cdns_phy->dev;
> > + u32 ref_clk_rate;
> > + int ret;
> > +
> > + cdns_phy->ref_clk = devm_clk_get(dev, "ref");
> > + if (IS_ERR(cdns_phy->ref_clk)) {
> > + dev_err(dev, "phy ref clock not found\n");
> > + return PTR_ERR(cdns_phy->ref_clk);
> > + }
> > +
> > + cdns_phy->apb_clk = devm_clk_get(dev, "apb");
> > + if (IS_ERR(cdns_phy->apb_clk)) {
> > + dev_err(dev, "phy apb clock not found\n");
> > + return PTR_ERR(cdns_phy->apb_clk);
>
> not _put for ref_clk?
ref clock is enabled only driver probe, so it don't need to explicitly call devm_clk_put() to release the clock.
>
> > + }
> > +
> > + ret = clk_prepare_enable(cdns_phy->ref_clk);
> > + if (ret) {
> > + dev_err(cdns_phy->dev, "Failed to prepare ref clock\n");
> > + return ret;
>
> what happens to clk refs you have already taken?
Same as above reason.
>
> > + }
> > +
> > + ref_clk_rate = clk_get_rate(cdns_phy->ref_clk);
> > + if (!ref_clk_rate) {
> > + dev_err(cdns_phy->dev, "Failed to get ref clock rate\n");
> > + goto err_ref_clk;
> > + }
> > +
> > + if (ref_clk_rate == REF_CLK_27MHZ)
> > + cdns_phy->ref_clk_rate = ref_clk_rate;
> > + else {
> > + dev_err(cdns_phy->dev, "Not support Ref Clock
> Rate(%dHz)\n", ref_clk_rate);
> > + goto err_ref_clk;
> > + }
> > +
> > + ret = clk_prepare_enable(cdns_phy->apb_clk);
> > + if (ret) {
> > + dev_err(cdns_phy->dev, "Failed to prepare apb clock\n");
> > + goto err_ref_clk;
> > + }
> > +
> > + return 0;
> > +
> > +err_ref_clk:
> > + clk_disable_unprepare(cdns_phy->ref_clk);
> > + return -EINVAL;
> > +}
> > +
> > +static void hdptx_hdmi_clk_disable(struct cdns_hdptx_hdmi_phy
> > +*cdns_phy) {
> > + clk_disable_unprepare(cdns_phy->ref_clk);
> > + clk_disable_unprepare(cdns_phy->apb_clk);
> > +}
> > +
> > +static void hdptx_hdmi_arc_config(struct cdns_hdptx_hdmi_phy
> > +*cdns_phy) {
> > + u16 txpu_calib_code;
> > + u16 txpd_calib_code;
> > + u16 txpu_adj_calib_code;
> > + u16 txpd_adj_calib_code;
> > + u16 prev_calib_code;
> > + u16 new_calib_code;
> > + u16 rdata;
> > +
> > + /* Power ARC */
> > + cdns_phy_reg_write(cdns_phy, TXDA_CYA_AUXDA_CYA, 0x0001);
> > +
> > + prev_calib_code = cdns_phy_reg_read(cdns_phy,
> TX_DIG_CTRL_REG_2);
> > + txpu_calib_code = cdns_phy_reg_read(cdns_phy,
> CMN_TXPUCAL_CTRL);
> > + txpd_calib_code = cdns_phy_reg_read(cdns_phy,
> CMN_TXPDCAL_CTRL);
> > + txpu_adj_calib_code = cdns_phy_reg_read(cdns_phy,
> CMN_TXPU_ADJ_CTRL);
> > + txpd_adj_calib_code = cdns_phy_reg_read(cdns_phy,
> > + CMN_TXPD_ADJ_CTRL);
> > +
> > + new_calib_code = ((txpu_calib_code + txpd_calib_code) / 2)
> > + + txpu_adj_calib_code + txpd_adj_calib_code;
> > +
> > + if (new_calib_code != prev_calib_code) {
> > + rdata = cdns_phy_reg_read(cdns_phy,
> TX_ANA_CTRL_REG_1);
> > + rdata &= 0xDFFF;
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1,
> rdata);
> > + cdns_phy_reg_write(cdns_phy, TX_DIG_CTRL_REG_2,
> new_calib_code);
> > + mdelay(10);
> > + rdata |= 0x2000;
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1,
> rdata);
> > + udelay(150);
> > + }
> > +
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0100);
> > + udelay(100);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0300);
> > + udelay(100);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_3, 0x0000);
> > + udelay(100);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2008);
> > + udelay(100);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2018);
> > + udelay(100);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2098);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030C);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_5, 0x0010);
> > + udelay(100);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_4, 0x4001);
> > + mdelay(5);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2198);
> > + mdelay(5);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030D);
> > + udelay(100);
> > + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030F); }
> > +
> > +static void hdptx_hdmi_phy_set_vswing(struct cdns_hdptx_hdmi_phy
> > +*cdns_phy) {
> > + u32 k;
> > + const u32 num_lanes = 4;
> > +
> > + for (k = 0; k < num_lanes; k++) {
> > + cdns_phy_reg_write(cdns_phy, (TX_DIAG_TX_DRV | (k <<
> 9)), 0x7c0);
> > + cdns_phy_reg_write(cdns_phy,
> (TX_TXCC_CPOST_MULT_00_0 | (k << 9)), 0x0);
> > + cdns_phy_reg_write(cdns_phy,
> (TX_TXCC_CAL_SCLR_MULT_0 |
> > + (k << 9)), 0x120);
>
> magic numbers?
The values are the debug result for imx8mq to pass hdmi HDMI CTS.
And we haven’t found the value should be modify for different imx8mq platform.
>
> > + }
> > +}
> > +
> > +static int hdptx_hdmi_feedback_factor(struct cdns_hdptx_hdmi_phy
> > +*cdns_phy) {
> > + u32 feedback_factor;
> > +
> > + switch (cdns_phy->color_space) {
> > + case HDMI_PHY_COLORSPACE_YUV422:
> > + feedback_factor = 1000;
> > + break;
>
> empty line after each case please
OK.
>
> > + case HDMI_PHY_COLORSPACE_YUV420:
> > + switch (cdns_phy->bpc) {
> > + case 8:
> > + feedback_factor = 500;
> > + break;
> > + case 10:
> > + feedback_factor = 625;
> > + break;
> > + case 12:
> > + feedback_factor = 750;
> > + break;
> > + case 16:
> > + feedback_factor = 1000;
> > + break;
> > + default:
> > + dev_dbg(cdns_phy->dev, "Invalid
> ColorDepth\n");
> > + return 0;
> > + }
> > + break;
> > + default:
> > + /* Assume RGB/YUV444 */
> > + switch (cdns_phy->bpc) {
> > + case 10:
> > + feedback_factor = 1250;
> > + break;
> > + case 12:
> > + feedback_factor = 1500;
> > + break;
> > + case 16:
> > + feedback_factor = 2000;
> > + break;
> > + default:
> > + feedback_factor = 1000;
> > + }
> > + }
> > +
> > + return feedback_factor;
> > +}
> > +
> > +static int hdptx_hdmi_phy_config(struct cdns_hdptx_hdmi_phy *cdns_phy,
> > +
> const struct hdptx_hdmi_ctrl *p_ctrl_table,
> > +
> const struct hdptx_hdmi_pll_tuning *p_pll_table,
> > +
> char
> > +pclk_in)
>
> this looks bad, please run checkpatch --strict to align these properly
OK, I will check it with --strict.
>
> > +{
> > + const u32 num_lanes = 4;
> > + u32 val, i, k;
> > +
> > + /* enable PHY isolation mode only for CMN */
> > + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISOLATION_CTRL,
> 0xD000);
> > +
> > + /* set cmn_pll0_clk_datart1_div/cmn_pll0_clk_datart0_div dividers
> */
> > + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_ISO_PLL_CTRL1);
> > + val &= 0xFF00;
>
> lowercase hex values everywhere pls
OK, will change it.
>
> > + val |= 0x0012;
> > + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISO_PLL_CTRL1, val);
> > +
> > + /* assert PHY reset from isolation register */
> > + cdns_phy_reg_write(cdns_phy, PHY_ISO_CMN_CTRL, 0x0000);
> > + /* assert PMA CMN reset */
> > + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISO_CMN_CTRL,
> 0x0000);
> > +
> > + /* register XCVR_DIAG_BIDI_CTRL */
> > + for (k = 0; k < num_lanes; k++)
> > + cdns_phy_reg_write(cdns_phy, XCVR_DIAG_BIDI_CTRL |
> (k <<
> > + 9), 0x00FF);
> > +
> > + /* Describing Task phy_cfg_hdp */
> > +
> > + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> > + val &= 0xFFF7;
> > + val |= 0x0008;
> > + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> > +
> > + /* PHY Registers */
> > + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> > + val &= 0xCFFF;
> > + val |= p_ctrl_table->cmn_ref_clk_dig_div << 12;
> > + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> > +
> > + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL);
> > + val &= 0x00FF;
> > + val |= 0x1200;
> > + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val);
> > +
> > + /* Common control module control and diagnostic registers */
> > + val = cdns_phy_reg_read(cdns_phy, CMN_CDIAG_REFCLK_CTRL);
> > + val &= 0x8FFF;
> > + val |= p_ctrl_table->ref_clk_divider_scaler << 12;
> > + val |= 0x00C0;
> > + cdns_phy_reg_write(cdns_phy, CMN_CDIAG_REFCLK_CTRL, val);
> > +
> > + /* High speed clock used */
> > + val = cdns_phy_reg_read(cdns_phy, CMN_DIAG_HSCLK_SEL);
> > + val &= 0xFF00;
> > + val |= (p_ctrl_table->cmnda_hs_clk_0_sel >> 1) << 0;
> > + val |= (p_ctrl_table->cmnda_hs_clk_1_sel >> 1) << 4;
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_HSCLK_SEL, val);
> > +
> > + for (k = 0; k < num_lanes; k++) {
> > + val = cdns_phy_reg_read(cdns_phy,
> (XCVR_DIAG_HSCLK_SEL | (k << 9)));
> > + val &= 0xCFFF;
> > + val |= (p_ctrl_table->cmnda_hs_clk_0_sel >> 1) << 12;
> > + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_HSCLK_SEL |
> (k << 9)), val);
> > + }
> > +
> > + /* PLL 0 control state machine registers */
> > + val = p_ctrl_table->vco_ring_select << 12;
> > + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_USER_DEF_CTRL,
> val);
> > +
> > + if (pclk_in == true)
> > + val = 0x30A0;
> > + else {
> > + val = cdns_phy_reg_read(cdns_phy,
> CMN_PLL0_VCOCAL_START);
> > + val &= 0xFE00;
> > + val |= p_pll_table->vco_cal_code;
> > + }
> > + cdns_phy_reg_write(cdns_phy, CMN_PLL0_VCOCAL_START, val);
> > +
> > + cdns_phy_reg_write(cdns_phy, CMN_PLL0_VCOCAL_INIT_TMR,
> 0x0064);
> > + cdns_phy_reg_write(cdns_phy, CMN_PLL0_VCOCAL_ITER_TMR,
> 0x000A);
> > +
> > + /* Common functions control and diagnostics registers */
> > + val = p_ctrl_table->cmnda_pll0_hs_sym_div_sel << 8;
> > + val |= p_ctrl_table->cmnda_pll0_ip_div;
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_INCLK_CTRL, val);
> > +
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_OVRD, 0x0000);
> > +
> > + val = p_ctrl_table->cmnda_pll0_fb_div_high;
> > + val |= (1 << 15);
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_FBH_OVRD, val);
> > +
> > + val = p_ctrl_table->cmnda_pll0_fb_div_low;
> > + val |= (1 << 15);
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_FBL_OVRD, val);
> > +
> > + if (pclk_in == false) {
> > + val = p_ctrl_table->cmnda_pll0_pxdiv_low;
> > + cdns_phy_reg_write(cdns_phy,
> CMN_DIAG_PLL0_PXL_DIVL,
> > + val);
> > +
> > + val = p_ctrl_table->cmnda_pll0_pxdiv_high;
> > + val |= (1 << 15);
> > + cdns_phy_reg_write(cdns_phy,
> CMN_DIAG_PLL0_PXL_DIVH, val);
> > + }
> > +
> > + val = p_pll_table->volt_to_current_coarse;
> > + val |= (p_pll_table->volt_to_current) << 4;
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_V2I_TUNE, val);
> > +
> > + val = p_pll_table->charge_pump_gain;
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_CP_TUNE, val);
> > +
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_LF_PROG,
> 0x0008);
> > +
> > + val = p_pll_table->pmos_ctrl;
> > + val |= (p_pll_table->ndac_ctrl) << 8;
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_PTATIS_TUNE1,
> val);
> > +
> > + val = p_pll_table->ptat_ndac_ctrl;
> > + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_PTATIS_TUNE2,
> val);
> > +
> > + if (pclk_in == true)
> > + cdns_phy_reg_write(cdns_phy,
> CMN_DIAG_PLL0_TEST_MODE, 0x0022);
> > + else
> > + cdns_phy_reg_write(cdns_phy,
> CMN_DIAG_PLL0_TEST_MODE,
> > + 0x0020);
> > +
> > + cdns_phy_reg_write(cdns_phy, CMN_PSM_CLK_CTRL, 0x0016);
> > +
> > + /* Transceiver control and diagnostic registers */
> > + for (k = 0; k < num_lanes; k++) {
> > + val = cdns_phy_reg_read(cdns_phy,
> (XCVR_DIAG_PLLDRC_CTRL | (k << 9)));
> > + val &= 0xBFFF;
> > + cdns_phy_reg_write(cdns_phy,
> (XCVR_DIAG_PLLDRC_CTRL | (k << 9)), val);
> > + }
> > +
> > + for (k = 0; k < num_lanes; k++) {
> > + val = cdns_phy_reg_read(cdns_phy, (TX_DIAG_TX_CTRL |
> (k << 9)));
> > + val &= 0xFF3F;
> > + val |= (p_ctrl_table->hsclk_div_tx_sub_rate >> 1) << 6;
> > + cdns_phy_reg_write(cdns_phy, (TX_DIAG_TX_CTRL | (k <<
> 9)), val);
> > + }
> > +
> > + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> > + val &= 0xFF8F;
> > + /*
> > + * single ended reference clock (val |= 0x0030);
> > + * differential clock (val |= 0x0000);
> > + * for differential clock on the refclk_p and
> > + * refclk_m off chip pins: CMN_DIAG_ACYA[8]=1'b1
> > + * cdns_phy_reg_write(cdns_phy, CMN_DIAG_ACYA, 0x0100);
> > + */
> > + val |= 0x0030;
> > + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> > +
> > + /* Deassert PHY reset */
> > + cdns_phy_reg_write(cdns_phy, PHY_ISO_CMN_CTRL, 0x0001);
> > + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISO_CMN_CTRL,
> 0x0003);
> > +
> > + /* Power state machine registers */
> > + for (k = 0; k < num_lanes; k++)
> > + cdns_phy_reg_write(cdns_phy, XCVR_PSM_RCTRL | (k <<
> 9),
> > + 0xFEFC);
> > +
> > + /* Assert cmn_macro_pwr_en */
> > + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISO_CMN_CTRL,
> 0x0013);
> > +
> > + /* wait for cmn_macro_pwr_en_ack */
> > + for (i = 0; i < 10; i++) {
> > + val = cdns_phy_reg_read(cdns_phy,
> PHY_PMA_ISO_CMN_CTRL);
> > + if (val & (1 << 5))
> > + break;
> > + msleep(20);
> > + }
> > + if (i == 10) {
> > + dev_err(cdns_phy->dev, "PMA output macro power up
> failed\n");
> > + return -1;
> > + }
> > +
> > + /* wait for cmn_ready */
> > + for (i = 0; i < 10; i++) {
> > + val = cdns_phy_reg_read(cdns_phy,
> PHY_PMA_CMN_CTRL1);
> > + if (val & (1 << 0))
> > + break;
> > + msleep(20);
> > + }
> > + if (i == 10) {
> > + dev_err(cdns_phy->dev, "PMA output ready failed\n");
> > + return -1;
> > + }
> > +
> > + for (k = 0; k < num_lanes; k++) {
> > + cdns_phy_reg_write(cdns_phy, TX_PSC_A0 | (k << 9),
> 0x6791);
> > + cdns_phy_reg_write(cdns_phy, TX_PSC_A1 | (k << 9),
> 0x6790);
> > + cdns_phy_reg_write(cdns_phy, TX_PSC_A2 | (k << 9),
> 0x0090);
> > + cdns_phy_reg_write(cdns_phy, TX_PSC_A3 | (k << 9),
> > + 0x0090);
> > +
> > + val = cdns_phy_reg_read(cdns_phy, RX_PSC_CAL | (k <<
> 9));
> > + val &= 0xFFBB;
> > + cdns_phy_reg_write(cdns_phy, RX_PSC_CAL | (k << 9),
> > + val);
> > +
> > + val = cdns_phy_reg_read(cdns_phy, RX_PSC_A0 | (k << 9));
> > + val &= 0xFFBB;
> > + cdns_phy_reg_write(cdns_phy, RX_PSC_A0 | (k << 9), val);
> > + }
> > + return 0;
> > +}
> > +
> > +static int hdptx_hdmi_phy_cfg(struct cdns_hdptx_hdmi_phy *cdns_phy,
> > +u32 rate) {
> > + const struct hdptx_hdmi_ctrl *p_ctrl_table;
> > + const struct hdptx_hdmi_pll_tuning *p_pll_table;
> > + const u32 refclk_freq_khz = cdns_phy->ref_clk_rate / 1000;
> > + const u8 pclk_in = false;
> > + u32 pixel_freq = rate;
> > + u32 vco_freq, char_freq;
> > + u32 div_total, feedback_factor;
> > + u32 i, ret;
> > +
> > + feedback_factor = hdptx_hdmi_feedback_factor(cdns_phy);
> > +
> > + char_freq = pixel_freq * feedback_factor / 1000;
> > +
> > + dev_dbg(cdns_phy->dev, "Pixel clock: (%d KHz), character clock: %d,
> bpc is (%0d-bit)\n",
> > + pixel_freq, char_freq, cdns_phy->bpc);
> > +
> > + /* Get right row from the ctrl_table table.
> > + * Check if 'pixel_freq_khz' value matches the PIXEL_CLK_FREQ
> column.
> > + * Consider only the rows with FEEDBACK_FACTOR column matching
> feedback_factor.
> > + */
> > + for (i = 0; i < ARRAY_SIZE(pixel_clk_output_ctrl_table); i++) {
> > + if (feedback_factor ==
> pixel_clk_output_ctrl_table[i].feedback_factor &&
> > + pixel_freq ==
> pixel_clk_output_ctrl_table[i].pixel_clk_freq_min) {
> > + p_ctrl_table = &pixel_clk_output_ctrl_table[i];
> > + break;
> > + }
> > + }
> > + if (i == ARRAY_SIZE(pixel_clk_output_ctrl_table)) {
> > + dev_warn(cdns_phy->dev, "Pixel clk (%d KHz) not
> supported, bpc is (%0d-bit)\n",
> > + pixel_freq, cdns_phy->bpc);
> > + return 0;
> > + }
> > +
> > + div_total = p_ctrl_table->pll_fb_div_total;
> > + vco_freq = refclk_freq_khz * div_total /
> > + p_ctrl_table->cmnda_pll0_ip_div;
> > +
> > + /* Get right row from the pixel_clk_output_pll_table table.
> > + * Check if vco_freq_khz and feedback_div_total
> > + * column matching with pixel_clk_output_pll_table.
> > + */
> > + for (i = 0; i < ARRAY_SIZE(pixel_clk_output_pll_table); i++) {
> > + if (vco_freq == pixel_clk_output_pll_table[i].vco_freq_min
> &&
> > + div_total ==
> pixel_clk_output_pll_table[i].feedback_div_total) {
> > + p_pll_table = &pixel_clk_output_pll_table[i];
> > + break;
> > + }
> > + }
> > + if (i == ARRAY_SIZE(pixel_clk_output_pll_table)) {
> > + dev_warn(cdns_phy->dev, "VCO (%d KHz) not
> supported\n", vco_freq);
> > + return -1;
> > + }
> > + dev_dbg(cdns_phy->dev, "VCO frequency is (%d KHz)\n", vco_freq);
> > +
> > + ret = hdptx_hdmi_phy_config(cdns_phy, p_ctrl_table, p_pll_table,
> pclk_in);
> > + if (ret < 0)
> > + return ret;
> > +
> > + return char_freq;
> > +}
> > +
> > +static int hdptx_hdmi_phy_power_up(struct cdns_hdptx_hdmi_phy
> > +*cdns_phy) {
> > + u32 val, i;
> > +
> > + /* set Power State to A2 */
> > + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, 0x0004);
> > +
> > + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_0, 1);
> > + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_1, 1);
> > + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_2, 1);
> > + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_3, 1);
> > +
> > + /* Wait for Power State A2 Ack */
> > + for (i = 0; i < 10; i++) {
> > + val = cdns_phy_reg_read(cdns_phy,
> PHY_HDP_MODE_CTRL);
> > + if (val & (1 << 6))
> > + break;
> > + msleep(20);
> > + }
> > + if (i == 10) {
> > + dev_err(cdns_phy->dev, "Wait A2 Ack failed\n");
> > + return -1;
> > + }
> > +
> > + /* Power up ARC */
> > + hdptx_hdmi_arc_config(cdns_phy);
> > +
> > + /* Configure PHY in A0 mode (PHY must be in the A0 power
> > + * state in order to transmit data)
> > + */
> > + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, 0x0001);
> > +
> > + /* Wait for Power State A0 Ack */
> > + for (i = 0; i < 10; i++) {
> > + val = cdns_phy_reg_read(cdns_phy,
> PHY_HDP_MODE_CTRL);
> > + if (val & (1 << 4))
> > + break;
> > + msleep(20);
> > + }
> > + if (i == 10) {
> > + dev_err(cdns_phy->dev, "Wait A0 Ack failed\n");
> > + return -1;
> > + }
> > + return 0;
> > +}
> > +
> > +static int hdptx_hdmi_phy_power_down(struct cdns_hdptx_hdmi_phy
> > +*cdns_phy) {
> > + int timeout;
> > + u32 reg_val;
> > +
> > + reg_val = cdns_phy_reg_read(cdns_phy, PHY_HDP_MODE_CTRL);
> > + reg_val &= 0xfff0;
> > + /* PHY_DP_MODE_CTL set to A3 power state*/
> > + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, reg_val |
> 0x8);
> > +
> > + /* Wait for A3 acknowledge */
> > + timeout = 0;
> > + do {
> > + reg_val = cdns_phy_reg_read(cdns_phy,
> PHY_HDP_MODE_CTRL);
> > + dev_dbg(cdns_phy->dev, "Reg val is 0x%04x\n", reg_val);
> > + timeout++;
> > + msleep(100);
> > + } while (!(reg_val & (0x8 << 4)) && (timeout < 10));
> > +
> > + return 0;
> > +}
> > +
> > +static int cdns_hdptx_hdmi_phy_on(struct phy *phy) {
> > + struct cdns_hdptx_hdmi_phy *cdns_phy = phy_get_drvdata(phy);
> > +
> > + return hdptx_hdmi_phy_power_up(cdns_phy);
> > +}
> > +
> > +static int cdns_hdptx_hdmi_phy_off(struct phy *phy) {
> > + struct cdns_hdptx_hdmi_phy *cdns_phy = phy_get_drvdata(phy);
> > +
> > + hdptx_hdmi_phy_power_down(cdns_phy);
> > + return 0;
> > +}
> > +
> > +int cdns_hdptx_hdmi_phy_valid(struct phy *phy, enum phy_mode mode,
> int submode,
> > + union
> > +phy_configure_opts *opts) {
> > + u32 rate = opts->hdmi.pixel_clk_rate;
> > + int i;
> > +
> > + for (i = 0; i < ARRAY_SIZE(pixel_clk_output_ctrl_table); i++)
> > + if (rate ==
> pixel_clk_output_ctrl_table[i].pixel_clk_freq_min)
> > + return 0;
> > +
> > + return -EINVAL;
> > +}
> > +
> > +static int cdns_hdptx_hdmi_phy_init(struct phy *phy) {
> > + return 0;
> > +}
> > +
> > +static int cdns_hdptx_hdmi_configure(struct phy *phy,
> > + union phy_configure_opts *opts)
> {
> > + struct cdns_hdptx_hdmi_phy *cdns_phy = phy_get_drvdata(phy);
> > + int ret;
> > +
> > + cdns_phy->pixel_clk_rate = opts->hdmi.pixel_clk_rate;
> > + cdns_phy->color_space = opts->hdmi.color_space;
> > + cdns_phy->bpc = opts->hdmi.bpc;
> > +
> > + /* Check HDMI FW alive before HDMI PHY init */
> > + ret = hdptx_phy_check_alive(cdns_phy);
> > + if (ret == false) {
> > + dev_err(cdns_phy->dev, "NO HDMI FW running\n");
> > + return -ENXIO;
> > + }
> > +
> > + /* Configure PHY */
> > + if (hdptx_hdmi_phy_cfg(cdns_phy, cdns_phy->pixel_clk_rate) < 0) {
> > + dev_err(cdns_phy->dev, "failed to set phy pclock\n");
> > + return -EINVAL;
> > + }
> > +
> > + ret = hdptx_hdmi_phy_power_up(cdns_phy);
> > + if (ret < 0)
> > + return ret;
> > +
> > + hdptx_hdmi_phy_set_vswing(cdns_phy);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct phy_ops cdns_hdptx_hdmi_phy_ops = {
> > + .init = cdns_hdptx_hdmi_phy_init,
> > + .configure = cdns_hdptx_hdmi_configure,
> > + .power_on = cdns_hdptx_hdmi_phy_on,
> > + .power_off = cdns_hdptx_hdmi_phy_off,
> > + .validate = cdns_hdptx_hdmi_phy_valid,
> > + .owner = THIS_MODULE,
> > +};
> > +
> > +static int cdns_hdptx_hdmi_phy_probe(struct platform_device *pdev) {
> > + struct cdns_hdptx_hdmi_phy *cdns_phy;
> > + struct device *dev = &pdev->dev;
> > + struct device_node *node = dev->of_node;
> > + struct phy_provider *phy_provider;
> > + struct resource *res;
> > + struct phy *phy;
> > + int ret;
> > +
> > + cdns_phy = devm_kzalloc(dev, sizeof(*cdns_phy), GFP_KERNEL);
> > + if (!cdns_phy)
> > + return -ENOMEM;
> > +
> > + dev_set_drvdata(dev, cdns_phy);
> > + cdns_phy->dev = dev;
> > + mutex_init(&cdns_phy->mbox_mutex);
> > +
> > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + if (!res)
> > + return -ENODEV;
> > + cdns_phy->regs = devm_ioremap(dev, res->start,
> resource_size(res));
> > + if (IS_ERR(cdns_phy->regs))
> > + return PTR_ERR(cdns_phy->regs);
> > +
> > + phy = devm_phy_create(dev, node, &cdns_hdptx_hdmi_phy_ops);
> > + if (IS_ERR(phy))
> > + return PTR_ERR(phy);
> > +
> > + phy->attrs.mode = PHY_MODE_HDMI;
> > +
> > + cdns_phy->phy = phy;
> > + phy_set_drvdata(phy, cdns_phy);
> > +
> > + ret = hdptx_hdmi_clk_enable(cdns_phy);
> > + if (ret) {
> > + dev_err(dev, "Init clk fail\n");
> > + return -EINVAL;
> > + }
> > +
> > + phy_provider = devm_of_phy_provider_register(dev,
> of_phy_simple_xlate);
> > + if (IS_ERR(phy_provider)) {
> > + ret = PTR_ERR(phy_provider);
> > + goto clk_disable;
> > + }
> > +
> > + dev_dbg(dev, "probe success!\n");
> > +
> > + return 0;
> > +
> > +clk_disable:
> > + hdptx_hdmi_clk_disable(cdns_phy);
> > +
> > + return -EINVAL;
> > +}
> > +
> > +static int cdns_hdptx_hdmi_phy_remove(struct platform_device *pdev) {
> > + struct cdns_hdptx_hdmi_phy *cdns_phy =
> > +platform_get_drvdata(pdev);
> > +
> > + hdptx_hdmi_clk_disable(cdns_phy);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct of_device_id cdns_hdptx_hdmi_phy_of_match[] = {
> > + {.compatible = "fsl,imx8mq-hdmi-phy" },
> > + { /* sentinel */ }
> > +};
> > +MODULE_DEVICE_TABLE(of, cdns_hdptx_hdmi_phy_of_match);
> > +
> > +static struct platform_driver cdns_hdptx_hdmi_phy_driver = {
> > + .probe = cdns_hdptx_hdmi_phy_probe,
> > + .remove = cdns_hdptx_hdmi_phy_remove,
> > + .driver = {
> > + .name = "cdns-hdptx-hdmi-phy",
> > + .of_match_table = cdns_hdptx_hdmi_phy_of_match,
> > + }
> > +};
> > +module_platform_driver(cdns_hdptx_hdmi_phy_driver);
> > +
> > +MODULE_AUTHOR("Sandor Yu <sandor.yu at nxp.com>");
> > +MODULE_DESCRIPTION("Cadence HDP-TX HDMI PHY driver");
> > +MODULE_LICENSE("GPL");
> > --
> > 2.34.1
>
> --
> ~Vinod
B.R
Sandor
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