RE: [PATCH v8 19/26] PM / devfreq: rockchip-dfi: add support for RK3588

["Chanwoo Choi" <cw00.choi@samsung.com>]

> -----Original Message-----
> From: Chanwoo Choi <chanwoo@kernel.org>
> Sent: Thursday, October 19, 2023 12:12 AM
> To: Sascha Hauer <s.hauer@pengutronix.de>; linux-
> rockchip@lists.infradead.org
> Cc: linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> linux-pm@vger.kernel.org; Heiko Stuebner <heiko@sntech.de>; Kyungmin Park
> <kyungmin.park@samsung.com>; MyungJoo Ham <myungjoo.ham@samsung.com>; Will
> Deacon <will@kernel.org>; Mark Rutland <mark.rutland@arm.com>;
> kernel@pengutronix.de; Michael Riesch <michael.riesch@wolfvision.net>;
> Robin Murphy <robin.murphy@arm.com>; Vincent Legoll
> <vincent.legoll@gmail.com>; Rob Herring <robh+dt@kernel.org>; Krzysztof
> Kozlowski <krzysztof.kozlowski+dt@linaro.org>; Conor Dooley
> <conor+dt@kernel.org>; devicetree@vger.kernel.org; Sebastian Reichel
> <sebastian.reichel@collabora.com>; Jonathan Cameron
> <Jonathan.Cameron@huawei.com>
> Subject: Re: [PATCH v8 19/26] PM / devfreq: rockchip-dfi: add support for
> RK3588
> 
> On 23. 10. 18. 15:17, Sascha Hauer wrote:
> > Add support for the RK3588 to the driver. The RK3588 has four DDR
> > channels with a register stride of 0x4000 between the channel
> > registers, also it has a DDRMON_CTRL register per channel.
> >
> > Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> > Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
> > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> > ---
> >  drivers/devfreq/event/rockchip-dfi.c | 36 +++++++++++++++++++++++++++-
> >  include/soc/rockchip/rk3588_grf.h    | 18 ++++++++++++++
> >  2 files changed, 53 insertions(+), 1 deletion(-)  create mode 100644
> > include/soc/rockchip/rk3588_grf.h
> >
> > diff --git a/drivers/devfreq/event/rockchip-dfi.c
> > b/drivers/devfreq/event/rockchip-dfi.c
> > index bf38829a2a4af..794f36e7eebd1 100644
> > --- a/drivers/devfreq/event/rockchip-dfi.c
> > +++ b/drivers/devfreq/event/rockchip-dfi.c
> > @@ -26,8 +26,9 @@
> >  #include <soc/rockchip/rockchip_grf.h>  #include
> > <soc/rockchip/rk3399_grf.h>  #include <soc/rockchip/rk3568_grf.h>
> > +#include <soc/rockchip/rk3588_grf.h>
> >
> > -#define DMC_MAX_CHANNELS	2
> > +#define DMC_MAX_CHANNELS	4
> >
> >  #define HIWORD_UPDATE(val, mask)	((val) | (mask) << 16)
> >
> > @@ -723,9 +724,42 @@ static int rk3568_dfi_init(struct rockchip_dfi *dfi)
> >  	return 0;
> >  };
> >
> > +static int rk3588_dfi_init(struct rockchip_dfi *dfi) {
> > +	struct regmap *regmap_pmu = dfi->regmap_pmu;
> > +	u32 reg2, reg3, reg4;
> > +
> > +	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG2, &reg2);
> > +	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG3, &reg3);
> > +	regmap_read(regmap_pmu, RK3588_PMUGRF_OS_REG4, &reg4);
> > +
> > +	/* lower 3 bits of the DDR type */
> > +	dfi->ddr_type = FIELD_GET(RK3588_PMUGRF_OS_REG2_DRAMTYPE_INFO,
> > +reg2);
> > +
> > +	/*
> > +	 * For version three and higher the upper two bits of the DDR type
> are
> > +	 * in RK3588_PMUGRF_OS_REG3
> > +	 */
> > +	if (FIELD_GET(RK3588_PMUGRF_OS_REG3_SYSREG_VERSION, reg3) >= 0x3)
> > +		dfi->ddr_type |=
> FIELD_GET(RK3588_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3,
> > +reg3) << 3;
> > +
> > +	dfi->buswidth[0] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH0, reg2) ==
> 0 ? 4 : 2;
> > +	dfi->buswidth[1] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH1, reg2) ==
> 0 ? 4 : 2;
> > +	dfi->buswidth[2] = FIELD_GET(RK3568_PMUGRF_OS_REG2_BW_CH0, reg4) ==
> 0 ? 4 : 2;
> > +	dfi->buswidth[3] = FIELD_GET(RK3588_PMUGRF_OS_REG2_BW_CH1, reg4) ==
> 0 ? 4 : 2;
> > +	dfi->channel_mask = FIELD_GET(RK3588_PMUGRF_OS_REG2_CH_INFO, reg2)
> |
> > +			    FIELD_GET(RK3588_PMUGRF_OS_REG2_CH_INFO, reg4) << 2;
> > +	dfi->max_channels = 4;
> > +
> > +	dfi->ddrmon_stride = 0x4000;
> > +
> > +	return 0;
> > +};
> > +
> >  static const struct of_device_id rockchip_dfi_id_match[] = {
> >  	{ .compatible = "rockchip,rk3399-dfi", .data = rk3399_dfi_init },
> >  	{ .compatible = "rockchip,rk3568-dfi", .data = rk3568_dfi_init },
> > +	{ .compatible = "rockchip,rk3588-dfi", .data = rk3588_dfi_init },
> >  	{ },
> >  };
> >
> > diff --git a/include/soc/rockchip/rk3588_grf.h
> > b/include/soc/rockchip/rk3588_grf.h
> > new file mode 100644
> > index 0000000000000..630b35a550640
> > --- /dev/null
> > +++ b/include/soc/rockchip/rk3588_grf.h
> > @@ -0,0 +1,18 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ */ #ifndef __SOC_RK3588_GRF_H
> > +#define __SOC_RK3588_GRF_H
> > +
> > +#define RK3588_PMUGRF_OS_REG2		0x208
> > +#define RK3588_PMUGRF_OS_REG2_DRAMTYPE_INFO		GENMASK(15, 13)
> > +#define RK3588_PMUGRF_OS_REG2_BW_CH0			GENMASK(3, 2)
> > +#define RK3588_PMUGRF_OS_REG2_BW_CH1                    GENMASK(19, 18)
> > +#define RK3588_PMUGRF_OS_REG2_CH_INFO                   GENMASK(29, 28)
> > +
> > +#define RK3588_PMUGRF_OS_REG3		0x20c
> > +#define RK3588_PMUGRF_OS_REG3_DRAMTYPE_INFO_V3		GENMASK(13, 12)
> > +#define RK3588_PMUGRF_OS_REG3_SYSREG_VERSION		GENMASK(31, 28)
> > +
> > +#define RK3588_PMUGRF_OS_REG4           0x210
> > +#define RK3588_PMUGRF_OS_REG5           0x214
> > +
> > +#endif /* __SOC_RK3588_GRF_H */
> 
> Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
> 
> --
> Best Regards,
> Samsung Electronics
> Chanwoo Choi


Applied it. Thanks

Best Regards,
Chanwoo Choi