mbox series

[V4,0/6] soc: imx8mp: Finish support for HDMI

Message ID 20240210204606.11944-1-aford173@gmail.com
Headers show
Series soc: imx8mp: Finish support for HDMI | expand

Message

Adam Ford Feb. 10, 2024, 8:45 p.m. UTC
The i.MX8M Plus has an HDMI controller, which depends on several
other systems.  The Parallel Video Interface (PVI) and the
HDMI-TX are already in the Linux-Next staging area 20240209, but
the HDMI PHY driver and several device trees updates are still needed.

This series is adapted from multiple series from Lucas Stach with
edits and suggestions from feedback from various attemps, but it
since it's difficult to use and test them independently,
I merged them into on unified series.  The version history is a
bit ambiguous since different components were submitted at different
times and had different amount of attempts.  

The previous attempt I did used the wrong starting point for the PHY,
so this update includes a newer starting point with tags from that version
and fixes from various people's feedback.  I hope I caught them all, but 
I apologize if I missed something. Any tags from the previous attempt I
made were intentionally dropped, because of the significant change,
but I kept tags from the newer version I grabbed from patchwork.

Because several items from the last attempt were merged, this
series is only focussed on adding the HDMI PHY driver, and enabling
the power domain, irqsteer interrupt controller, and HDMI pipeline
in the device tree. The version numbers are a bit strange since
these all got pulled from various attempts with different versions,
but I wanted to push them together as a series to complete the pending
work.

Adam Ford (1):
  arm64: defconfig: Enable DRM_IMX8MP_DW_HDMI_BRIDGE as module

Lucas Stach (5):
  dt-bindings: phy: add binding for the i.MX8MP HDMI PHY
  phy: freescale: add Samsung HDMI PHY
  arm64: dts: imx8mp: add HDMI power-domains
  arm64: dts: imx8mp: add HDMI irqsteer
  arm64: dts: imx8mp: add HDMI display pipeline

 .../bindings/phy/fsl,imx8mp-hdmi-phy.yaml     |  62 ++
 arch/arm64/boot/dts/freescale/imx8mp.dtsi     | 145 ++++
 arch/arm64/configs/defconfig                  |   1 +
 drivers/phy/freescale/Kconfig                 |   6 +
 drivers/phy/freescale/Makefile                |   1 +
 drivers/phy/freescale/phy-fsl-samsung-hdmi.c  | 721 ++++++++++++++++++
 6 files changed, 936 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/fsl,imx8mp-hdmi-phy.yaml
 create mode 100644 drivers/phy/freescale/phy-fsl-samsung-hdmi.c

Comments

Marek Vasut Feb. 11, 2024, 6:51 p.m. UTC | #1
On 2/10/24 21:45, Adam Ford wrote:
> From: Lucas Stach <l.stach@pengutronix.de>
> 
> This adds the driver for the Samsung HDMI PHY found on the
> i.MX8MP SoC. Based on downstream implementation from
> Sandor Yu <Sandor.yu@nxp.com>.  According to the TRM, the PHY
> receives parallel data from the link and serializes it.  It
> also sets the PLL clock needed for the TX serializer.
> 
> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com> (v2)
> Tested-by: Richard Leitner <richard.leitner@skidata.com> (v2)
> Co-developed-by: Marco Felsch <m.felsch@pengutronix.de>
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> # Kontron BL
> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
> Signed-off-by: Adam Ford <aford173@gmail.com>

Tested-by: Marek Vasut <marex@denx.de>

Thanks !
Marek Vasut Feb. 11, 2024, 6:51 p.m. UTC | #2
On 2/10/24 21:45, Adam Ford wrote:
> From: Lucas Stach <l.stach@pengutronix.de>
> 
> This adds the PGC and HDMI blk-ctrl nodes providing power control for
> HDMI subsystem peripherals.
> 
> Signed-off-by: Adam Ford <aford173@gmail.com>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

Tested-by: Marek Vasut <marex@denx.de>

Thanks !
Marek Vasut Feb. 11, 2024, 6:52 p.m. UTC | #3
On 2/10/24 21:46, Adam Ford wrote:
> From: Lucas Stach <l.stach@pengutronix.de>
> 
> The HDMI irqsteer is a secondary interrupt controller within the HDMI
> subsystem that maps all HDMI peripheral IRQs into a single upstream
> IRQ line.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Signed-off-by: Adam Ford <aford173@gmail.com>

Tested-by: Marek Vasut <marex@denx.de>

Thanks !
Marek Vasut Feb. 11, 2024, 6:52 p.m. UTC | #4
On 2/10/24 21:46, Adam Ford wrote:
> From: Lucas Stach <l.stach@pengutronix.de>
> 
> This adds the DT nodes for all the peripherals that make up the
> HDMI display pipeline.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Signed-off-by: Adam Ford <aford173@gmail.com>

Tested-by: Marek Vasut <marex@denx.de>

Thanks !
Luca Ceresoli Feb. 14, 2024, 11:14 a.m. UTC | #5
On Sat, 10 Feb 2024 14:45:58 -0600
Adam Ford <aford173@gmail.com> wrote:

> From: Lucas Stach <l.stach@pengutronix.de>
> 
> This adds the driver for the Samsung HDMI PHY found on the
> i.MX8MP SoC. Based on downstream implementation from
> Sandor Yu <Sandor.yu@nxp.com>.  According to the TRM, the PHY
> receives parallel data from the link and serializes it.  It
> also sets the PLL clock needed for the TX serializer.
> 
> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com> (v2)
> Tested-by: Richard Leitner <richard.leitner@skidata.com> (v2)
> Co-developed-by: Marco Felsch <m.felsch@pengutronix.de>
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> # Kontron BL
> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
> Signed-off-by: Adam Ford <aford173@gmail.com>

[...]

> +static int phy_clk_register(struct fsl_samsung_hdmi_phy *phy)
> +{
> +	struct device *dev = phy->dev;
> +	struct device_node *np = dev->of_node;
> +	struct clk_init_data init;
> +	const char *parent_name;
> +	struct clk *phyclk;
> +	int ret;
> +
> +	parent_name = __clk_get_name(phy->refclk);
> +
> +	init.parent_names = &parent_name;
> +	init.num_parents = 1;
> +	init.flags = 0;
> +	init.name = "hdmi_pclk";
> +	init.ops = &phy_clk_ops;
> +
> +	phy->hw.init = &init;
> +
> +	phyclk = devm_clk_register(dev, &phy->hw);
> +	if (IS_ERR(phyclk))
> +		return dev_err_probe(dev, PTR_ERR(phyclk),
> +				     "failed to register clock\n");
> +
> +	ret = of_clk_add_provider(np, of_clk_src_simple_get, phyclk);

As per my v8 review, this function is deprecated:
https://elixir.bootlin.com/linux/v6.8-rc4/source/drivers/clk/clk.c#L4881

However:

[Tested using Avnet MSC SM2S-IMX8PLUS SoM on Avnet MSC SM2-MB-EP1]
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

Luca
Luca Ceresoli Feb. 14, 2024, 11:15 a.m. UTC | #6
On Sat, 10 Feb 2024 14:45:59 -0600
Adam Ford <aford173@gmail.com> wrote:

> From: Lucas Stach <l.stach@pengutronix.de>
> 
> This adds the PGC and HDMI blk-ctrl nodes providing power control for
> HDMI subsystem peripherals.
> 
> Signed-off-by: Adam Ford <aford173@gmail.com>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

[Tested using Avnet MSC SM2S-IMX8PLUS SoM on Avnet MSC SM2-MB-EP1]
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Luca Ceresoli Feb. 14, 2024, 11:15 a.m. UTC | #7
On Sat, 10 Feb 2024 14:46:00 -0600
Adam Ford <aford173@gmail.com> wrote:

> From: Lucas Stach <l.stach@pengutronix.de>
> 
> The HDMI irqsteer is a secondary interrupt controller within the HDMI
> subsystem that maps all HDMI peripheral IRQs into a single upstream
> IRQ line.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Signed-off-by: Adam Ford <aford173@gmail.com>
> ---
> V2:  Add my (Adam) s-o-b and re-order position under AIPS4
> ---
>  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> index 0730d4cf9bc4..9b8ab367d774 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -1927,6 +1927,19 @@ hdmi_blk_ctrl: blk-ctrl@32fc0000 {
>  						     "hdcp", "hrv";
>  				#power-domain-cells = <1>;
>  			};
> +
> +			irqsteer_hdmi: interrupt-controller@32fc2000 {
> +				compatible = "fsl,imx-irqsteer";
> +				reg = <0x32fc2000 0x44>;

The last register being at offset 0x44, this should be <0x32fc2000
0x48> or even <... 0x1000> as the TRM mentions a 4 kB size.

[Tested using Avnet MSC SM2S-IMX8PLUS SoM on Avnet MSC SM2-MB-EP1]
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>


Luca
Luca Ceresoli Feb. 14, 2024, 11:15 a.m. UTC | #8
On Sat, 10 Feb 2024 14:46:01 -0600
Adam Ford <aford173@gmail.com> wrote:

> From: Lucas Stach <l.stach@pengutronix.de>
> 
> This adds the DT nodes for all the peripherals that make up the
> HDMI display pipeline.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Signed-off-by: Adam Ford <aford173@gmail.com>
> ---
> V3:  Re-ordered the HDMI parts to properly come after irqstree_hdmi
>      inside AIPS4.  Change size of LCDIF3 and PVI to match TRM sizes
>      of 4KB.
> 
> V2:  I took this from Lucas' original submission with the following:
>      Removed extra clock from HDMI-TX since it is now part of the
>      power domain
>      Added interrupt-parent to PVI
>      Changed the name of the HDMI tranmitter to fsl,imx8mp-hdmi-tx
>      Added ports to HDMI-tx

[Tested using Avnet MSC SM2S-IMX8PLUS SoM on Avnet MSC SM2-MB-EP1]
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Luca Ceresoli Feb. 14, 2024, 11:15 a.m. UTC | #9
On Sat, 10 Feb 2024 14:46:02 -0600
Adam Ford <aford173@gmail.com> wrote:

> The i.MX8M Plus has support for an HDMI transmitter.  The
> video is genereated by lcdif3, routed to the hdmi parallel
> video interface, then fed to a DW HDMI bridge to support
> up to 4K video output.
> 
> Signed-off-by: Adam Ford <aford173@gmail.com>

Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

[Tested using Avnet MSC SM2S-IMX8PLUS SoM on Avnet MSC SM2-MB-EP1]
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Adam Ford Feb. 14, 2024, 12:35 p.m. UTC | #10
On Wed, Feb 14, 2024 at 5:14 AM Luca Ceresoli <luca.ceresoli@bootlin.com> wrote:
>
> On Sat, 10 Feb 2024 14:45:58 -0600
> Adam Ford <aford173@gmail.com> wrote:
>
> > From: Lucas Stach <l.stach@pengutronix.de>
> >
> > This adds the driver for the Samsung HDMI PHY found on the
> > i.MX8MP SoC. Based on downstream implementation from
> > Sandor Yu <Sandor.yu@nxp.com>.  According to the TRM, the PHY
> > receives parallel data from the link and serializes it.  It
> > also sets the PLL clock needed for the TX serializer.
> >
> > Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com> (v2)
> > Tested-by: Richard Leitner <richard.leitner@skidata.com> (v2)
> > Co-developed-by: Marco Felsch <m.felsch@pengutronix.de>
> > Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> > Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> > Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> > Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> # Kontron BL
> > Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
> > Signed-off-by: Adam Ford <aford173@gmail.com>
>
> [...]
>
> > +static int phy_clk_register(struct fsl_samsung_hdmi_phy *phy)
> > +{
> > +     struct device *dev = phy->dev;
> > +     struct device_node *np = dev->of_node;
> > +     struct clk_init_data init;
> > +     const char *parent_name;
> > +     struct clk *phyclk;
> > +     int ret;
> > +
> > +     parent_name = __clk_get_name(phy->refclk);
> > +
> > +     init.parent_names = &parent_name;
> > +     init.num_parents = 1;
> > +     init.flags = 0;
> > +     init.name = "hdmi_pclk";
> > +     init.ops = &phy_clk_ops;
> > +
> > +     phy->hw.init = &init;
> > +
> > +     phyclk = devm_clk_register(dev, &phy->hw);
> > +     if (IS_ERR(phyclk))
> > +             return dev_err_probe(dev, PTR_ERR(phyclk),
> > +                                  "failed to register clock\n");
> > +
> > +     ret = of_clk_add_provider(np, of_clk_src_simple_get, phyclk);
>
> As per my v8 review, this function is deprecated:
> https://elixir.bootlin.com/linux/v6.8-rc4/source/drivers/clk/clk.c#L4881
>

When I found out that the entire driver I pulled was the wrong
starting point, and noticed that this version had very little in
common with the previous one, I didn't review the feedback knowing tha
tI would have thrown away any of the tags from it since it was such a
drastic change.  I should have caught it, but I missed it, so
apologies for that.  I will be sure to include this feedback in the
next attempt.


> However:
>
> [Tested using Avnet MSC SM2S-IMX8PLUS SoM on Avnet MSC SM2-MB-EP1]
> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

Thanks for testing.

adam
>
> Luca
>
> --
> Luca Ceresoli, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
Adam Ford Feb. 14, 2024, 12:36 p.m. UTC | #11
On Wed, Feb 14, 2024 at 5:15 AM Luca Ceresoli <luca.ceresoli@bootlin.com> wrote:
>
> On Sat, 10 Feb 2024 14:46:00 -0600
> Adam Ford <aford173@gmail.com> wrote:
>
> > From: Lucas Stach <l.stach@pengutronix.de>
> >
> > The HDMI irqsteer is a secondary interrupt controller within the HDMI
> > subsystem that maps all HDMI peripheral IRQs into a single upstream
> > IRQ line.
> >
> > Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> > Signed-off-by: Adam Ford <aford173@gmail.com>
> > ---
> > V2:  Add my (Adam) s-o-b and re-order position under AIPS4
> > ---
> >  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 13 +++++++++++++
> >  1 file changed, 13 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > index 0730d4cf9bc4..9b8ab367d774 100644
> > --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > @@ -1927,6 +1927,19 @@ hdmi_blk_ctrl: blk-ctrl@32fc0000 {
> >                                                    "hdcp", "hrv";
> >                               #power-domain-cells = <1>;
> >                       };
> > +
> > +                     irqsteer_hdmi: interrupt-controller@32fc2000 {
> > +                             compatible = "fsl,imx-irqsteer";
> > +                             reg = <0x32fc2000 0x44>;
>
> The last register being at offset 0x44, this should be <0x32fc2000
> 0x48> or even <... 0x1000> as the TRM mentions a 4 kB size.

I'll do 0x1000 in the next revision to match the documentation since
there doesn't appear to be any overlap.

adam
>
> [Tested using Avnet MSC SM2S-IMX8PLUS SoM on Avnet MSC SM2-MB-EP1]
> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
>
>
> Luca
>
> --
> Luca Ceresoli, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
Joao Paulo Goncalves Feb. 15, 2024, 3:23 p.m. UTC | #12
>The i.MX8M Plus has an HDMI controller, which depends on several
>other systems.  The Parallel Video Interface (PVI) and the
>HDMI-TX are already in the Linux-Next staging area 20240209, but
>the HDMI PHY driver and several device trees updates are still needed.

>This series is adapted from multiple series from Lucas Stach with
>edits and suggestions from feedback from various attemps, but it
>since it's difficult to use and test them independently,
>I merged them into on unified series.  The version history is a
>bit ambiguous since different components were submitted at different
>times and had different amount of attempts.

>The previous attempt I did used the wrong starting point for the PHY,
>so this update includes a newer starting point with tags from that version
>and fixes from various people's feedback.  I hope I caught them all, but
>I apologize if I missed something. Any tags from the previous attempt I
>made were intentionally dropped, because of the significant change,
>but I kept tags from the newer version I grabbed from patchwork.

>Because several items from the last attempt were merged, this
>series is only focussed on adding the HDMI PHY driver, and enabling
>the power domain, irqsteer interrupt controller, and HDMI pipeline
>in the device tree. The version numbers are a bit strange since
>these all got pulled from various attempts with different versions,
>but I wanted to push them together as a series to complete the pending
>work.

Tested-by: Joao Paulo Goncalves <joao.goncalves@toradex.com> # Toradex Verdin iMX8MP

Thanks!

Regards,
Joao Paulo Goncalves
Vinod Koul Feb. 16, 2024, 6:11 a.m. UTC | #13
On 10-02-24, 14:45, Adam Ford wrote:
> From: Lucas Stach <l.stach@pengutronix.de>
> 
> This adds the driver for the Samsung HDMI PHY found on the
> i.MX8MP SoC. Based on downstream implementation from
> Sandor Yu <Sandor.yu@nxp.com>.  According to the TRM, the PHY
> receives parallel data from the link and serializes it.  It
> also sets the PLL clock needed for the TX serializer.
> 
> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com> (v2)
> Tested-by: Richard Leitner <richard.leitner@skidata.com> (v2)
> Co-developed-by: Marco Felsch <m.felsch@pengutronix.de>
> Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
> Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> # Kontron BL
> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
> Signed-off-by: Adam Ford <aford173@gmail.com>
> ---
> V4:
> - I (Adam) added a comment in the code for clarifcation
>   based on questions from Luca concerning a difference
>   between the code and the ref manual.
> - Fixed the GENMASK on REG14
> - Expanded the commit message briefly describing
>   a bit more of what this driver does.
> - Removed some unnecessary include files.
> 
> v3:
> - use GENMASK/FIELD_PREP
> - lowercase hex values
> - correct coding style
> v2:
> - use DEFINE_RUNTIME_DEV_PM_OPS
> ---
>  drivers/phy/freescale/Kconfig                |   6 +
>  drivers/phy/freescale/Makefile               |   1 +
>  drivers/phy/freescale/phy-fsl-samsung-hdmi.c | 721 +++++++++++++++++++
>  3 files changed, 728 insertions(+)
>  create mode 100644 drivers/phy/freescale/phy-fsl-samsung-hdmi.c
> 
> diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig
> index 853958fb2c06..5c2b73042dfc 100644
> --- a/drivers/phy/freescale/Kconfig
> +++ b/drivers/phy/freescale/Kconfig
> @@ -35,6 +35,12 @@ config PHY_FSL_IMX8M_PCIE
>  	  Enable this to add support for the PCIE PHY as found on
>  	  i.MX8M family of SOCs.
>  
> +config PHY_FSL_SAMSUNG_HDMI_PHY
> +	tristate "Samsung HDMI PHY support"
> +	depends on OF && HAS_IOMEM
> +	help
> +	  Enable this to add support for the Samsung HDMI PHY in i.MX8MP.
> +
>  endif
>  
>  config PHY_FSL_LYNX_28G
> diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile
> index cedb328bc4d2..c4386bfdb853 100644
> --- a/drivers/phy/freescale/Makefile
> +++ b/drivers/phy/freescale/Makefile
> @@ -4,3 +4,4 @@ obj-$(CONFIG_PHY_MIXEL_LVDS_PHY)	+= phy-fsl-imx8qm-lvds-phy.o
>  obj-$(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_FSL_SAMSUNG_HDMI_PHY)	+= phy-fsl-samsung-hdmi.o
> diff --git a/drivers/phy/freescale/phy-fsl-samsung-hdmi.c b/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
> new file mode 100644
> index 000000000000..91cf8e4668b2
> --- /dev/null
> +++ b/drivers/phy/freescale/phy-fsl-samsung-hdmi.c
> @@ -0,0 +1,721 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright 2020 NXP
> + * Copyright 2022 Pengutronix, Lucas Stach <kernel@pengutronix.de>
> + */
> +
> +#include <linux/bitfield.h>
> +#include <linux/bits.h>
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>

Do you need both of these headers?

> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/iopoll.h>

same here

> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +
> +#define PHY_REG_00		0x00
> +#define PHY_REG_01		0x04
> +#define PHY_REG_02		0x08
> +#define PHY_REG_08		0x20
> +#define PHY_REG_09		0x24
> +#define PHY_REG_10		0x28
> +#define PHY_REG_11		0x2c
> +
> +#define PHY_REG_12		0x30
> +#define  REG12_CK_DIV_MASK	GENMASK(5, 4)
> +
> +#define PHY_REG_13		0x34
> +#define  REG13_TG_CODE_LOW_MASK	GENMASK(7, 0)
> +
> +#define PHY_REG_14		0x38
> +#define  REG14_TOL_MASK		GENMASK(7, 4)
> +#define  REG14_RP_CODE_MASK	GENMASK(3, 1)
> +#define  REG14_TG_CODE_HIGH_MASK	GENMASK(0, 0)
> +
> +#define PHY_REG_15		0x3c
> +#define PHY_REG_16		0x40
> +#define PHY_REG_17		0x44
> +#define PHY_REG_18		0x48
> +#define PHY_REG_19		0x4c
> +#define PHY_REG_20		0x50
> +
> +#define PHY_REG_21		0x54
> +#define  REG21_SEL_TX_CK_INV	BIT(7)
> +#define  REG21_PMS_S_MASK	GENMASK(3, 0)
> +
> +#define PHY_REG_22		0x58
> +#define PHY_REG_23		0x5c
> +#define PHY_REG_24		0x60
> +#define PHY_REG_25		0x64
> +#define PHY_REG_26		0x68
> +#define PHY_REG_27		0x6c
> +#define PHY_REG_28		0x70
> +#define PHY_REG_29		0x74
> +#define PHY_REG_30		0x78
> +#define PHY_REG_31		0x7c
> +#define PHY_REG_32		0x80
> +
> +/*
> + * REG33 does not match the ref manual. According to Sandor Yu from NXP,
> + * "There is a doc issue on the i.MX8MP latest RM"
> + * REG33 is being used per guidance from Sandor
> + */
> +
> +#define PHY_REG_33		0x84
> +#define  REG33_MODE_SET_DONE	BIT(7)
> +#define  REG33_FIX_DA		BIT(1)
> +
> +#define PHY_REG_34		0x88
> +#define  REG34_PHY_READY	BIT(7)
> +#define  REG34_PLL_LOCK		BIT(6)
> +#define  REG34_PHY_CLK_READY	BIT(5)
> +
> +#define PHY_REG_35		0x8c
> +#define PHY_REG_36		0x90
> +#define PHY_REG_37		0x94
> +#define PHY_REG_38		0x98
> +#define PHY_REG_39		0x9c
> +#define PHY_REG_40		0xa0
> +#define PHY_REG_41		0xa4
> +#define PHY_REG_42		0xa8
> +#define PHY_REG_43		0xac
> +#define PHY_REG_44		0xb0
> +#define PHY_REG_45		0xb4
> +#define PHY_REG_46		0xb8
> +#define PHY_REG_47		0xbc
> +
> +#define PHY_PLL_DIV_REGS_NUM 6
> +
> +struct phy_config {
> +	u32	pixclk;
> +	u8	pll_div_regs[PHY_PLL_DIV_REGS_NUM];
> +};
> +
> +const struct phy_config phy_pll_cfg[] = {
> +	{
> +		.pixclk = 22250000,
> +		.pll_div_regs = { 0x4b, 0xf1, 0x89, 0x88, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 23750000,
> +		.pll_div_regs = { 0x50, 0xf1, 0x86, 0x85, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 24000000,
> +		.pll_div_regs = { 0x50, 0xf0, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 24024000,
> +		.pll_div_regs = { 0x50, 0xf1, 0x99, 0x02, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 25175000,
> +		.pll_div_regs = { 0x54, 0xfc, 0xcc, 0x91, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 25200000,
> +		.pll_div_regs = { 0x54, 0xf0, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 26750000,
> +		.pll_div_regs = { 0x5a, 0xf2, 0x89, 0x88, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 27000000,
> +		.pll_div_regs = { 0x5a, 0xf0, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 27027000,
> +		.pll_div_regs = { 0x5a, 0xf2, 0xfd, 0x0c, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 29500000,
> +		.pll_div_regs = { 0x62, 0xf4, 0x95, 0x08, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 30750000,
> +		.pll_div_regs = { 0x66, 0xf4, 0x82, 0x01, 0x88, 0x45 },
> +	}, {
> +		.pixclk = 30888000,
> +		.pll_div_regs = { 0x66, 0xf4, 0x99, 0x18, 0x88, 0x45 },
> +	}, {
> +		.pixclk = 33750000,
> +		.pll_div_regs = { 0x70, 0xf4, 0x82, 0x01, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 35000000,
> +		.pll_div_regs = { 0x58, 0xb8, 0x8b, 0x88, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 36000000,
> +		.pll_div_regs = { 0x5a, 0xb0, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 36036000,
> +		.pll_div_regs = { 0x5a, 0xb2, 0xfd, 0x0c, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 40000000,
> +		.pll_div_regs = { 0x64, 0xb0, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 43200000,
> +		.pll_div_regs = { 0x5a, 0x90, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 43243200,
> +		.pll_div_regs = { 0x5a, 0x92, 0xfd, 0x0c, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 44500000,
> +		.pll_div_regs = { 0x5c, 0x92, 0x98, 0x11, 0x84, 0x41 },
> +	}, {
> +		.pixclk = 47000000,
> +		.pll_div_regs = { 0x62, 0x94, 0x95, 0x82, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 47500000,
> +		.pll_div_regs = { 0x63, 0x96, 0xa1, 0x82, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 50349650,
> +		.pll_div_regs = { 0x54, 0x7c, 0xc3, 0x8f, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 50400000,
> +		.pll_div_regs = { 0x54, 0x70, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 53250000,
> +		.pll_div_regs = { 0x58, 0x72, 0x84, 0x03, 0x82, 0x41 },
> +	}, {
> +		.pixclk = 53500000,
> +		.pll_div_regs = { 0x5a, 0x72, 0x89, 0x88, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 54000000,
> +		.pll_div_regs = { 0x5a, 0x70, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 54054000,
> +		.pll_div_regs = { 0x5a, 0x72, 0xfd, 0x0c, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 59000000,
> +		.pll_div_regs = { 0x62, 0x74, 0x95, 0x08, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 59340659,
> +		.pll_div_regs = { 0x62, 0x74, 0xdb, 0x52, 0x88, 0x47 },
> +	}, {
> +		.pixclk = 59400000,
> +		.pll_div_regs = { 0x63, 0x70, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 61500000,
> +		.pll_div_regs = { 0x66, 0x74, 0x82, 0x01, 0x88, 0x45 },
> +	}, {
> +		.pixclk = 63500000,
> +		.pll_div_regs = { 0x69, 0x74, 0x89, 0x08, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 67500000,
> +		.pll_div_regs = { 0x54, 0x52, 0x87, 0x03, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 70000000,
> +		.pll_div_regs = { 0x58, 0x58, 0x8b, 0x88, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 72000000,
> +		.pll_div_regs = { 0x5a, 0x50, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 72072000,
> +		.pll_div_regs = { 0x5a, 0x52, 0xfd, 0x0c, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 74176000,
> +		.pll_div_regs = { 0x5d, 0x58, 0xdb, 0xA2, 0x88, 0x41 },
> +	}, {
> +		.pixclk = 74250000,
> +		.pll_div_regs = { 0x5c, 0x52, 0x90, 0x0d, 0x84, 0x41 },
> +	}, {
> +		.pixclk = 78500000,
> +		.pll_div_regs = { 0x62, 0x54, 0x87, 0x01, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 80000000,
> +		.pll_div_regs = { 0x64, 0x50, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 82000000,
> +		.pll_div_regs = { 0x66, 0x54, 0x82, 0x01, 0x88, 0x45 },
> +	}, {
> +		.pixclk = 82500000,
> +		.pll_div_regs = { 0x67, 0x54, 0x88, 0x01, 0x90, 0x49 },
> +	}, {
> +		.pixclk = 89000000,
> +		.pll_div_regs = { 0x70, 0x54, 0x84, 0x83, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 90000000,
> +		.pll_div_regs = { 0x70, 0x54, 0x82, 0x01, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 94000000,
> +		.pll_div_regs = { 0x4e, 0x32, 0xa7, 0x10, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 95000000,
> +		.pll_div_regs = { 0x50, 0x31, 0x86, 0x85, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 98901099,
> +		.pll_div_regs = { 0x52, 0x3a, 0xdb, 0x4c, 0x88, 0x47 },
> +	}, {
> +		.pixclk = 99000000,
> +		.pll_div_regs = { 0x52, 0x32, 0x82, 0x01, 0x88, 0x47 },
> +	}, {
> +		.pixclk = 100699300,
> +		.pll_div_regs = { 0x54, 0x3c, 0xc3, 0x8f, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 100800000,
> +		.pll_div_regs = { 0x54, 0x30, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 102500000,
> +		.pll_div_regs = { 0x55, 0x32, 0x8c, 0x05, 0x90, 0x4b },
> +	}, {
> +		.pixclk = 104750000,
> +		.pll_div_regs = { 0x57, 0x32, 0x98, 0x07, 0x90, 0x49 },
> +	}, {
> +		.pixclk = 106500000,
> +		.pll_div_regs = { 0x58, 0x32, 0x84, 0x03, 0x82, 0x41 },
> +	}, {
> +		.pixclk = 107000000,
> +		.pll_div_regs = { 0x5a, 0x32, 0x89, 0x88, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 108000000,
> +		.pll_div_regs = { 0x5a, 0x30, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 108108000,
> +		.pll_div_regs = { 0x5a, 0x32, 0xfd, 0x0c, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 118000000,
> +		.pll_div_regs = { 0x62, 0x34, 0x95, 0x08, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 118800000,
> +		.pll_div_regs = { 0x63, 0x30, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 123000000,
> +		.pll_div_regs = { 0x66, 0x34, 0x82, 0x01, 0x88, 0x45 },
> +	}, {
> +		.pixclk = 127000000,
> +		.pll_div_regs = { 0x69, 0x34, 0x89, 0x08, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 135000000,
> +		.pll_div_regs = { 0x70, 0x34, 0x82, 0x01, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 135580000,
> +		.pll_div_regs = { 0x71, 0x39, 0xe9, 0x82, 0x9c, 0x5b },
> +	}, {
> +		.pixclk = 137520000,
> +		.pll_div_regs = { 0x72, 0x38, 0x99, 0x10, 0x85, 0x41 },
> +	}, {
> +		.pixclk = 138750000,
> +		.pll_div_regs = { 0x73, 0x35, 0x88, 0x05, 0x90, 0x4d },
> +	}, {
> +		.pixclk = 140000000,
> +		.pll_div_regs = { 0x75, 0x36, 0xa7, 0x90, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 144000000,
> +		.pll_div_regs = { 0x78, 0x30, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 148352000,
> +		.pll_div_regs = { 0x7b, 0x35, 0xdb, 0x39, 0x90, 0x45 },
> +	}, {
> +		.pixclk = 148500000,
> +		.pll_div_regs = { 0x7b, 0x35, 0x84, 0x03, 0x90, 0x45 },
> +	}, {
> +		.pixclk = 154000000,
> +		.pll_div_regs = { 0x40, 0x18, 0x83, 0x01, 0x00, 0x40 },
> +	}, {
> +		.pixclk = 157000000,
> +		.pll_div_regs = { 0x41, 0x11, 0xa7, 0x14, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 160000000,
> +		.pll_div_regs = { 0x42, 0x12, 0xa1, 0x20, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 162000000,
> +		.pll_div_regs = { 0x43, 0x18, 0x8b, 0x08, 0x96, 0x55 },
> +	}, {
> +		.pixclk = 164000000,
> +		.pll_div_regs = { 0x45, 0x11, 0x83, 0x82, 0x90, 0x4b },
> +	}, {
> +		.pixclk = 165000000,
> +		.pll_div_regs = { 0x45, 0x11, 0x84, 0x81, 0x90, 0x4b },
> +	}, {
> +		.pixclk = 180000000,
> +		.pll_div_regs = { 0x4b, 0x10, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 185625000,
> +		.pll_div_regs = { 0x4e, 0x12, 0x9a, 0x95, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 188000000,
> +		.pll_div_regs = { 0x4e, 0x12, 0xa7, 0x10, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 198000000,
> +		.pll_div_regs = { 0x52, 0x12, 0x82, 0x01, 0x88, 0x47 },
> +	}, {
> +		.pixclk = 205000000,
> +		.pll_div_regs = { 0x55, 0x12, 0x8c, 0x05, 0x90, 0x4b },
> +	}, {
> +		.pixclk = 209500000,
> +		.pll_div_regs = { 0x57, 0x12, 0x98, 0x07, 0x90, 0x49 },
> +	}, {
> +		.pixclk = 213000000,
> +		.pll_div_regs = { 0x58, 0x12, 0x84, 0x03, 0x82, 0x41 },
> +	}, {
> +		.pixclk = 216000000,
> +		.pll_div_regs = { 0x5a, 0x10, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 216216000,
> +		.pll_div_regs = { 0x5a, 0x12, 0xfd, 0x0c, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 237600000,
> +		.pll_div_regs = { 0x63, 0x10, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 254000000,
> +		.pll_div_regs = { 0x69, 0x14, 0x89, 0x08, 0x80, 0x40 },
> +	}, {
> +		.pixclk = 277500000,
> +		.pll_div_regs = { 0x73, 0x15, 0x88, 0x05, 0x90, 0x4d },
> +	}, {
> +		.pixclk = 288000000,
> +		.pll_div_regs = { 0x78, 0x10, 0x00, 0x00, 0x80, 0x00 },
> +	}, {
> +		.pixclk = 297000000,
> +		.pll_div_regs = { 0x7b, 0x15, 0x84, 0x03, 0x90, 0x45 },
> +	},
> +};
> +
> +struct reg_settings {
> +	u8 reg;
> +	u8 val;
> +};
> +
> +const struct reg_settings common_phy_cfg[] = {
> +	{ PHY_REG_00, 0x00 }, { PHY_REG_01, 0xd1 },
> +	{ PHY_REG_08, 0x4f }, { PHY_REG_09, 0x30 },
> +	{ PHY_REG_10, 0x33 }, { PHY_REG_11, 0x65 },
> +	/* REG12 pixclk specific */
> +	/* REG13 pixclk specific */
> +	/* REG14 pixclk specific */
> +	{ PHY_REG_15, 0x80 }, { PHY_REG_16, 0x6c },
> +	{ PHY_REG_17, 0xf2 }, { PHY_REG_18, 0x67 },
> +	{ PHY_REG_19, 0x00 }, { PHY_REG_20, 0x10 },
> +	/* REG21 pixclk specific */
> +	{ PHY_REG_22, 0x30 }, { PHY_REG_23, 0x32 },
> +	{ PHY_REG_24, 0x60 }, { PHY_REG_25, 0x8f },
> +	{ PHY_REG_26, 0x00 }, { PHY_REG_27, 0x00 },
> +	{ PHY_REG_28, 0x08 }, { PHY_REG_29, 0x00 },
> +	{ PHY_REG_30, 0x00 }, { PHY_REG_31, 0x00 },
> +	{ PHY_REG_32, 0x00 }, { PHY_REG_33, 0x80 },
> +	{ PHY_REG_34, 0x00 }, { PHY_REG_35, 0x00 },
> +	{ PHY_REG_36, 0x00 }, { PHY_REG_37, 0x00 },
> +	{ PHY_REG_38, 0x00 }, { PHY_REG_39, 0x00 },
> +	{ PHY_REG_40, 0x00 }, { PHY_REG_41, 0xe0 },
> +	{ PHY_REG_42, 0x83 }, { PHY_REG_43, 0x0f },
> +	{ PHY_REG_44, 0x3E }, { PHY_REG_45, 0xf8 },
> +	{ PHY_REG_46, 0x00 }, { PHY_REG_47, 0x00 }
> +};
> +
> +struct fsl_samsung_hdmi_phy {
> +	struct device *dev;
> +	void __iomem *regs;
> +	struct clk *apbclk;
> +	struct clk *refclk;
> +
> +	/* clk provider */
> +	struct clk_hw hw;
> +	const struct phy_config *cur_cfg;
> +};
> +
> +static inline struct fsl_samsung_hdmi_phy *
> +to_fsl_samsung_hdmi_phy(struct clk_hw *hw)
> +{
> +	return container_of(hw, struct fsl_samsung_hdmi_phy, hw);
> +}
> +
> +static void
> +fsl_samsung_hdmi_phy_configure_pixclk(struct fsl_samsung_hdmi_phy *phy,
> +				      const struct phy_config *cfg)
> +{
> +	u8 div;

this would lead to static checkers complaining that div can be used
uninitialized, there is no default in the switch below to handle that, so
better to initialize this to 0 here

> +
> +	switch (cfg->pixclk) {
> +	case  22250000 ...  33750000:
> +		div = 0xf;
> +		break;
> +	case  35000000 ...  40000000:
> +		div = 0xb;
> +		break;
> +	case  43200000 ...  47500000:
> +		div = 0x9;
> +		break;
> +	case  50349650 ...  63500000:
> +		div = 0x7;
> +		break;
> +	case  67500000 ...  90000000:
> +		div = 0x5;
> +		break;
> +	case  94000000 ... 148500000:
> +		div = 0x3;
> +		break;
> +	case 154000000 ... 297000000:
> +		div = 0x1;
> +		break;
> +	}
> +
> +	writeb(REG21_SEL_TX_CK_INV | FIELD_PREP(REG21_PMS_S_MASK, div),
> +	       phy->regs + PHY_REG_21);
> +}
> +
> +static void
> +fsl_samsung_hdmi_phy_configure_pll_lock_det(struct fsl_samsung_hdmi_phy *phy,
> +					    const struct phy_config *cfg)
> +{
> +	u32 pclk = cfg->pixclk;
> +	u32 fld_tg_code;
> +	u32 pclk_khz;
> +	u8 div;

this might suffer from same issue

> +
> +	switch (cfg->pixclk) {
> +	case  22250000 ...  47500000:
> +		div = 1;
> +		break;
> +	case  50349650 ...  99000000:
> +		div = 2;
> +		break;
> +	case 100699300 ... 198000000:
> +		div = 4;
> +		break;
> +	case 205000000 ... 297000000:
> +		div = 8;
> +		break;
> +	}
> +
> +	writeb(FIELD_PREP(REG12_CK_DIV_MASK, ilog2(div)), phy->regs + PHY_REG_12);
> +
> +	/*
> +	 * Calculation for the frequency lock detector target code (fld_tg_code)
> +	 * is based on reference manual register description of PHY_REG13
> +	 * (13.10.3.1.14.2):
> +	 *   1st) Calculate int_pllclk which is determinded by FLD_CK_DIV
> +	 *   2nd) Increase resolution to avoid rounding issues
> +	 *   3th) Do the div (256 / Freq. of int_pllclk) * 24
> +	 *   4th) Reduce the resolution and always round up since the NXP
> +	 *        settings rounding up always too. TODO: Check if that is
> +	 *        correct.
> +	 */
> +	pclk /= div;
> +	pclk_khz = pclk / 1000;
> +	fld_tg_code = 256 * 1000 * 1000 / pclk_khz * 24;
> +	fld_tg_code = DIV_ROUND_UP(fld_tg_code, 1000);
> +
> +	/* FLD_TOL and FLD_RP_CODE taken from downstream driver */
> +	writeb(FIELD_PREP(REG13_TG_CODE_LOW_MASK, fld_tg_code),
> +	       phy->regs + PHY_REG_13);
> +	writeb(FIELD_PREP(REG14_TOL_MASK, 2) |
> +	       FIELD_PREP(REG14_RP_CODE_MASK, 2) |
> +	       FIELD_PREP(REG14_TG_CODE_HIGH_MASK, fld_tg_code >> 8),
> +	       phy->regs + PHY_REG_14);
> +}
> +
> +static int fsl_samsung_hdmi_phy_configure(struct fsl_samsung_hdmi_phy *phy,
> +					  const struct phy_config *cfg)
> +{
> +	int i, ret;
> +	u8 val;
> +
> +	/* HDMI PHY init */
> +	writeb(REG33_FIX_DA, phy->regs + PHY_REG_33);
> +
> +	/* common PHY registers */
> +	for (i = 0; i < ARRAY_SIZE(common_phy_cfg); i++)
> +		writeb(common_phy_cfg[i].val, phy->regs + common_phy_cfg[i].reg);
> +
> +	/* set individual PLL registers PHY_REG2 ... PHY_REG7 */
> +	for (i = 0; i < PHY_PLL_DIV_REGS_NUM; i++)
> +		writeb(cfg->pll_div_regs[i], phy->regs + PHY_REG_02 + i * 4);
> +
> +	fsl_samsung_hdmi_phy_configure_pixclk(phy, cfg);
> +	fsl_samsung_hdmi_phy_configure_pll_lock_det(phy, cfg);
> +
> +	writeb(REG33_FIX_DA | REG33_MODE_SET_DONE, phy->regs + PHY_REG_33);
> +
> +	ret = readb_poll_timeout(phy->regs + PHY_REG_34, val,
> +				 val & REG34_PLL_LOCK, 50, 20000);
> +	if (ret)
> +		dev_err(phy->dev, "PLL failed to lock\n");
> +
> +	return ret;
> +}
> +
> +static unsigned long phy_clk_recalc_rate(struct clk_hw *hw,
> +					 unsigned long parent_rate)
> +{
> +	struct fsl_samsung_hdmi_phy *phy = to_fsl_samsung_hdmi_phy(hw);
> +
> +	if (!phy->cur_cfg)
> +		return 74250000;
> +
> +	return phy->cur_cfg->pixclk;
> +}
> +
> +static long phy_clk_round_rate(struct clk_hw *hw,
> +			       unsigned long rate, unsigned long *parent_rate)
> +{
> +	int i;
> +
> +	for (i = ARRAY_SIZE(phy_pll_cfg) - 1; i >= 0; i--)
> +		if (phy_pll_cfg[i].pixclk <= rate)
> +			return phy_pll_cfg[i].pixclk;
> +
> +	return -EINVAL;
> +}
> +
> +static int phy_clk_set_rate(struct clk_hw *hw,
> +			    unsigned long rate, unsigned long parent_rate)
> +{
> +	struct fsl_samsung_hdmi_phy *phy = to_fsl_samsung_hdmi_phy(hw);
> +	int i;
> +
> +	for (i = ARRAY_SIZE(phy_pll_cfg) - 1; i >= 0; i--)
> +		if (phy_pll_cfg[i].pixclk <= rate)
> +			break;
> +
> +	if (i < 0)
> +		return -EINVAL;
> +
> +	phy->cur_cfg = &phy_pll_cfg[i];
> +
> +	return fsl_samsung_hdmi_phy_configure(phy, phy->cur_cfg);
> +}
> +
> +static const struct clk_ops phy_clk_ops = {
> +	.recalc_rate = phy_clk_recalc_rate,
> +	.round_rate = phy_clk_round_rate,
> +	.set_rate = phy_clk_set_rate,
> +};
> +
> +static int phy_clk_register(struct fsl_samsung_hdmi_phy *phy)
> +{
> +	struct device *dev = phy->dev;
> +	struct device_node *np = dev->of_node;
> +	struct clk_init_data init;
> +	const char *parent_name;
> +	struct clk *phyclk;
> +	int ret;
> +
> +	parent_name = __clk_get_name(phy->refclk);
> +
> +	init.parent_names = &parent_name;
> +	init.num_parents = 1;
> +	init.flags = 0;
> +	init.name = "hdmi_pclk";
> +	init.ops = &phy_clk_ops;
> +
> +	phy->hw.init = &init;
> +
> +	phyclk = devm_clk_register(dev, &phy->hw);
> +	if (IS_ERR(phyclk))
> +		return dev_err_probe(dev, PTR_ERR(phyclk),
> +				     "failed to register clock\n");
> +
> +	ret = of_clk_add_provider(np, of_clk_src_simple_get, phyclk);
> +	if (ret)
> +		return dev_err_probe(dev, ret,
> +				     "failed to register clock provider\n");
> +
> +	return 0;
> +}
> +
> +static int fsl_samsung_hdmi_phy_probe(struct platform_device *pdev)
> +{
> +	struct fsl_samsung_hdmi_phy *phy;
> +	int ret;
> +
> +	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
> +	if (!phy)
> +		return -ENOMEM;
> +
> +	platform_set_drvdata(pdev, phy);
> +	phy->dev = &pdev->dev;
> +
> +	phy->regs = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(phy->regs))
> +		return PTR_ERR(phy->regs);
> +
> +	phy->apbclk = devm_clk_get(phy->dev, "apb");
> +	if (IS_ERR(phy->apbclk))
> +		return dev_err_probe(phy->dev, PTR_ERR(phy->apbclk),
> +				     "failed to get apb clk\n");
> +
> +	phy->refclk = devm_clk_get(phy->dev, "ref");
> +	if (IS_ERR(phy->refclk))
> +		return dev_err_probe(phy->dev, PTR_ERR(phy->refclk),
> +				     "failed to get ref clk\n");
> +
> +	ret = clk_prepare_enable(phy->apbclk);
> +	if (ret) {
> +		dev_err(phy->dev, "failed to enable apbclk\n");
> +		return ret;
> +	}
> +
> +	pm_runtime_get_noresume(phy->dev);
> +	pm_runtime_set_active(phy->dev);
> +	pm_runtime_enable(phy->dev);
> +
> +	ret = phy_clk_register(phy);
> +	if (ret) {
> +		dev_err(&pdev->dev, "register clk failed\n");
> +		goto register_clk_failed;
> +	}
> +
> +	pm_runtime_put(phy->dev);
> +
> +	return 0;
> +
> +register_clk_failed:
> +	clk_disable_unprepare(phy->apbclk);
> +
> +	return ret;
> +}
> +
> +static int fsl_samsung_hdmi_phy_remove(struct platform_device *pdev)
> +{
> +	of_clk_del_provider(pdev->dev.of_node);
> +
> +	return 0;
> +}
> +
> +static int fsl_samsung_hdmi_phy_suspend(struct device *dev)

annotate these with __maybe_unused please, when PM is disabled we get
warning about unused symbols

> +{
> +	struct fsl_samsung_hdmi_phy *phy = dev_get_drvdata(dev);
> +
> +	clk_disable_unprepare(phy->apbclk);
> +
> +	return 0;
> +}
> +
> +static int fsl_samsung_hdmi_phy_resume(struct device *dev)
> +{
> +	struct fsl_samsung_hdmi_phy *phy = dev_get_drvdata(dev);
> +	int ret = 0;
> +
> +	ret = clk_prepare_enable(phy->apbclk);
> +	if (ret) {
> +		dev_err(phy->dev, "failed to enable apbclk\n");
> +		return ret;
> +	}
> +
> +	if (phy->cur_cfg)
> +		ret = fsl_samsung_hdmi_phy_configure(phy, phy->cur_cfg);
> +
> +	return ret;
> +
> +}
> +
> +static DEFINE_RUNTIME_DEV_PM_OPS(fsl_samsung_hdmi_phy_pm_ops,
> +				 fsl_samsung_hdmi_phy_suspend,
> +				 fsl_samsung_hdmi_phy_resume, NULL);
> +
> +static const struct of_device_id fsl_samsung_hdmi_phy_of_match[] = {
> +	{
> +		.compatible = "fsl,imx8mp-hdmi-phy",
> +	}, {
> +		/* sentinel */
> +	}
> +};
> +MODULE_DEVICE_TABLE(of, fsl_samsung_hdmi_phy_of_match);
> +
> +static struct platform_driver fsl_samsung_hdmi_phy_driver = {
> +	.probe  = fsl_samsung_hdmi_phy_probe,
> +	.remove = fsl_samsung_hdmi_phy_remove,
> +	.driver = {
> +		.name = "fsl-samsung-hdmi-phy",
> +		.of_match_table = fsl_samsung_hdmi_phy_of_match,
> +		.pm = pm_ptr(&fsl_samsung_hdmi_phy_pm_ops),
> +	},
> +};
> +module_platform_driver(fsl_samsung_hdmi_phy_driver);
> +
> +MODULE_AUTHOR("Sandor Yu <Sandor.yu@nxp.com>");
> +MODULE_DESCRIPTION("SAMSUNG HDMI 2.0 Transmitter PHY Driver");
> +MODULE_LICENSE("GPL");
> -- 
> 2.43.0