linux-kernel - Re: [RESEND PATCH v3 3/3] phy: amlogic: phy-meson-axg-mipi-pcie-analog: add support for MIPI DSI analog

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Message-ID: <593b8745-6cb5-b6c3-9540-07dc6bc429b0@baylibre.com>
Date:   Fri, 20 Nov 2020 15:55:12 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Remi Pommarel <repk@...plefau.lt>
Subject: Re: [RESEND PATCH v3 3/3] phy: amlogic:
 phy-meson-axg-mipi-pcie-analog: add support for MIPI DSI analog

On 20/11/2020 10:58, Vinod Koul wrote:
> On 16-11-20, 11:16, Neil Armstrong wrote:
>> The AXG Analog MIPI-DSI PHY also provides functions to the PCIe PHY,
>> thus we need to have inclusive support for both interfaces at runtime.
>>
>> This fixes the regmap get from parent node, removes cell param
>> to select a mode and implement runtime configuration & power on/off
>> for both functions since they are not exclusive.
>>
>> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
>> Reviewed-by: Remi Pommarel <repk@...plefau.lt>
>> ---
>>  drivers/phy/amlogic/Kconfig                   |   1 +
>>  .../amlogic/phy-meson-axg-mipi-pcie-analog.c  | 204 ++++++++++++------
>>  2 files changed, 136 insertions(+), 69 deletions(-)
>>
>> diff --git a/drivers/phy/amlogic/Kconfig b/drivers/phy/amlogic/Kconfig
>> index 99e8a4c7f1f3..db5d0cd757e3 100644
>> --- a/drivers/phy/amlogic/Kconfig
>> +++ b/drivers/phy/amlogic/Kconfig
>> @@ -66,6 +66,7 @@ config PHY_MESON_AXG_MIPI_PCIE_ANALOG
>>  	depends on OF && (ARCH_MESON || COMPILE_TEST)
>>  	select GENERIC_PHY
>>  	select REGMAP_MMIO
>> +	select GENERIC_PHY_MIPI_DPHY
>>  	help
>>  	  Enable this to support the Meson MIPI + PCIE analog PHY
>>  	  found in Meson AXG SoCs.
>> diff --git a/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c b/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c
>> index 1431cbf885e1..6eb21551bdd9 100644
>> --- a/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c
>> +++ b/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c
>> @@ -4,9 +4,13 @@
>>   *
>>   * Copyright (C) 2019 Remi Pommarel <repk@...plefau.lt>
>>   */
>> +#include <linux/bitfield.h>
>> +#include <linux/bitops.h>
>>  #include <linux/module.h>
>>  #include <linux/phy/phy.h>
>>  #include <linux/regmap.h>
>> +#include <linux/delay.h>
>> +#include <linux/mfd/syscon.h>
>>  #include <linux/platform_device.h>
>>  #include <dt-bindings/phy/phy.h>
>>  
>> @@ -14,10 +18,10 @@
>>  #define		HHI_MIPI_CNTL0_COMMON_BLOCK	GENMASK(31, 28)
>>  #define		HHI_MIPI_CNTL0_ENABLE		BIT(29)
>>  #define		HHI_MIPI_CNTL0_BANDGAP		BIT(26)
>> -#define		HHI_MIPI_CNTL0_DECODE_TO_RTERM	GENMASK(15, 12)
>> -#define		HHI_MIPI_CNTL0_OUTPUT_EN	BIT(3)
>> +#define		HHI_MIPI_CNTL0_DIF_REF_CTL1	GENMASK(25, 16)
>> +#define		HHI_MIPI_CNTL0_DIF_REF_CTL0	GENMASK(15, 0)
>>  
>> -#define HHI_MIPI_CNTL1 0x01
>> +#define HHI_MIPI_CNTL1 0x04
>>  #define		HHI_MIPI_CNTL1_CH0_CML_PDR_EN	BIT(12)
>>  #define		HHI_MIPI_CNTL1_LP_ABILITY	GENMASK(5, 4)
>>  #define		HHI_MIPI_CNTL1_LP_RESISTER	BIT(3)
>> @@ -25,100 +29,170 @@
>>  #define		HHI_MIPI_CNTL1_INPUT_SEL	BIT(1)
>>  #define		HHI_MIPI_CNTL1_PRBS7_EN		BIT(0)
>>  
>> -#define HHI_MIPI_CNTL2 0x02
>> +#define HHI_MIPI_CNTL2 0x08
>>  #define		HHI_MIPI_CNTL2_CH_PU		GENMASK(31, 25)
>>  #define		HHI_MIPI_CNTL2_CH_CTL		GENMASK(24, 19)
>>  #define		HHI_MIPI_CNTL2_CH0_DIGDR_EN	BIT(18)
>>  #define		HHI_MIPI_CNTL2_CH_DIGDR_EN	BIT(17)
>>  #define		HHI_MIPI_CNTL2_LPULPS_EN	BIT(16)
>> -#define		HHI_MIPI_CNTL2_CH_EN(n)		BIT(15 - (n))
>> +#define		HHI_MIPI_CNTL2_CH_EN		GENMASK(15, 11)
>>  #define		HHI_MIPI_CNTL2_CH0_LP_CTL	GENMASK(10, 1)
>>  
>> +#define DSI_LANE_0              (1 << 4)
>> +#define DSI_LANE_1              (1 << 3)
>> +#define DSI_LANE_CLK            (1 << 2)
>> +#define DSI_LANE_2              (1 << 1)
>> +#define DSI_LANE_3              (1 << 0)
>> +#define DSI_LANE_MASK		(0x1F)
> 
> This should use BIT(), also there are interesting helpers in bitfield.h
> to help with register fields, do send follow up patches..
> 

Ok, cleanup will follow

Thanks,
Neil