Re: [PATCH v2 5/8] pinctrl: sh-pfc: r8a77990: Add VIN pins, groups and functions

[jacopo mondi <jacopo@jmondi.org>]

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Hi Simon,
   thanks for looking into this patch

On Mon, Sep 10, 2018 at 03:01:15PM +0200, Simon Horman wrote:
> On Wed, Sep 05, 2018 at 05:29:42PM +0200, Jacopo Mondi wrote:
> > This patch adds VIN{4,5} pins, groups and functions to the R8A77990 SoC.
> >
> > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> > ---
> >  drivers/pinctrl/sh-pfc/pfc-r8a77990.c | 250 ++++++++++++++++++++++++++++++++++
> >  1 file changed, 250 insertions(+)
> >
> > diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a77990.c b/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
> > index b81c807..0797940 100644
> > --- a/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
> > +++ b/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
> > @@ -1831,6 +1831,194 @@ static const unsigned int usb30_id_mux[] = {
> >  	USB3HS0_ID_MARK,
> >  };
> >
> > +/* - VIN4 ------------------------------------------------------------------- */
> > +static const union vin_data vin4_data_a_pins = {
> > +	.data24 = {
> > +		RCAR_GP_PIN(2, 6),  RCAR_GP_PIN(2, 7),
> > +		RCAR_GP_PIN(2, 8),  RCAR_GP_PIN(2, 9),
> > +		RCAR_GP_PIN(2, 10), RCAR_GP_PIN(2, 11),
> > +		RCAR_GP_PIN(2, 12), RCAR_GP_PIN(2, 13),
> > +		RCAR_GP_PIN(1, 4),  RCAR_GP_PIN(1, 5),
> > +		RCAR_GP_PIN(1, 6),  RCAR_GP_PIN(1, 7),
> > +		RCAR_GP_PIN(1, 3),  RCAR_GP_PIN(1, 10),
> > +		RCAR_GP_PIN(1, 13), RCAR_GP_PIN(1, 14),
> > +		RCAR_GP_PIN(1, 9),  RCAR_GP_PIN(1, 12),
> > +		RCAR_GP_PIN(1, 15), RCAR_GP_PIN(1, 16),
> > +		RCAR_GP_PIN(1, 17), RCAR_GP_PIN(1, 18),
> > +		RCAR_GP_PIN(1, 19), RCAR_GP_PIN(0, 1),
> > +	},
> > +};
> > +
> > +static const union vin_data vin4_data_a_mux = {
> > +	.data24 = {
> > +		VI4_DATA0_A_MARK, VI4_DATA1_A_MARK,
> > +		VI4_DATA2_A_MARK, VI4_DATA3_A_MARK,
> > +		VI4_DATA4_A_MARK, VI4_DATA5_A_MARK,
> > +		VI4_DATA6_A_MARK, VI4_DATA7_A_MARK,
> > +		VI4_DATA8_MARK,   VI4_DATA9_MARK,
> > +		VI4_DATA10_MARK,  VI4_DATA11_MARK,
> > +		VI4_DATA12_MARK,  VI4_DATA13_MARK,
> > +		VI4_DATA14_MARK,  VI4_DATA15_MARK,
> > +		VI4_DATA16_MARK,  VI4_DATA17_MARK,
> > +		VI4_DATA18_MARK,  VI4_DATA19_MARK,
> > +		VI4_DATA20_MARK,  VI4_DATA21_MARK,
> > +		VI4_DATA22_MARK,  VI4_DATA23_MARK,
> > +	},
> > +};
> > +
> > +static const union vin_data vin4_data_b_pins = {
> > +	.data24 = {
> > +		RCAR_GP_PIN(1, 8),  RCAR_GP_PIN(1, 11),
> > +		RCAR_GP_PIN(1, 21), RCAR_GP_PIN(1, 22),
> > +		RCAR_GP_PIN(0, 5),  RCAR_GP_PIN(0, 6),
> > +		RCAR_GP_PIN(0, 16), RCAR_GP_PIN(0, 17),
>
> I am curious to know why the data B pins below (8 - 23)
> are duplicates of the corresponding data A pins in vin4_data_a_pins.
>

On R-Car E3 only pins [0-7] of VIN4 interface have an '_a' and '_b'
options. Pins from [8-23] are "shared".

We can discuss how we want this to be handled, but according to Table
6D.5 (pag. 383 of R-Car chip manual revision 1.00) this table is
correct.

Currently there are two open questions on this PFC patch:
1) This one here you reported
... (see below)

> > +		RCAR_GP_PIN(1, 4),  RCAR_GP_PIN(1, 5),
> > +		RCAR_GP_PIN(1, 6),  RCAR_GP_PIN(1, 7),
> > +		RCAR_GP_PIN(1, 3),  RCAR_GP_PIN(1, 10),
> > +		RCAR_GP_PIN(1, 13), RCAR_GP_PIN(1, 14),
> > +		RCAR_GP_PIN(1, 9),  RCAR_GP_PIN(1, 12),
> > +		RCAR_GP_PIN(1, 15), RCAR_GP_PIN(1, 15),
> > +		RCAR_GP_PIN(1, 17), RCAR_GP_PIN(1, 18),
> > +		RCAR_GP_PIN(1, 19), RCAR_GP_PIN(0, 1),
> > +	},
> > +};
> > +
> > +static const union vin_data vin4_data_b_mux = {
> > +	.data24 = {
> > +		VI4_DATA0_B_MARK, VI4_DATA1_B_MARK,
> > +		VI4_DATA2_B_MARK, VI4_DATA3_B_MARK,
> > +		VI4_DATA4_B_MARK, VI4_DATA5_B_MARK,
> > +		VI4_DATA6_B_MARK, VI4_DATA7_B_MARK,
> > +		VI4_DATA8_MARK,   VI4_DATA9_MARK,
> > +		VI4_DATA10_MARK,  VI4_DATA11_MARK,
> > +		VI4_DATA12_MARK,  VI4_DATA13_MARK,
> > +		VI4_DATA14_MARK,  VI4_DATA15_MARK,
> > +		VI4_DATA16_MARK,  VI4_DATA17_MARK,
> > +		VI4_DATA18_MARK,  VI4_DATA19_MARK,
> > +		VI4_DATA20_MARK,  VI4_DATA21_MARK,
> > +		VI4_DATA22_MARK,  VI4_DATA23_MARK,
> > +	},
> > +};
> > +
> > +static const unsigned int vin4_sync_pins[] = {
> > +	/* HSYNC, VSYNC */
> > +	RCAR_GP_PIN(2, 25), RCAR_GP_PIN(2, 24),
> > +};
> > +
> > +static const unsigned int vin4_sync_mux[] = {
> > +	VI4_HSYNC_N_MARK, VI4_VSYNC_N_MARK,
> > +};
> > +
> > +static const unsigned int vin4_field_pins[] = {
> > +	RCAR_GP_PIN(2, 23),
> > +};
> > +
> > +static const unsigned int vin4_field_mux[] = {
> > +	VI4_FIELD_MARK,
> > +};
> > +
> > +static const unsigned int vin4_clkenb_pins[] = {
> > +	RCAR_GP_PIN(1, 2),
> > +};
> > +
> > +static const unsigned int vin4_clkenb_mux[] = {
> > +	VI4_CLKENB_MARK,
> > +};
> > +
> > +static const unsigned int vin4_clk_pins[] = {
> > +	RCAR_GP_PIN(2, 22),
> > +};
> > +
> > +static const unsigned int vin4_clk_mux[] = {
> > +	VI4_CLK_MARK,
> > +};
> > +
> > +/* - VIN5 ------------------------------------------------------------------- */
> > +static const union vin_data vin5_data_a_pins = {
> > +	.data16 = {
> > +		RCAR_GP_PIN(1, 1),  RCAR_GP_PIN(1, 2),
> > +		RCAR_GP_PIN(1, 19), RCAR_GP_PIN(1, 12),
> > +		RCAR_GP_PIN(1, 15), RCAR_GP_PIN(1, 16),
> > +		RCAR_GP_PIN(1, 17), RCAR_GP_PIN(1, 18),
> > +		RCAR_GP_PIN(0, 12), RCAR_GP_PIN(0, 13),
> > +		RCAR_GP_PIN(0, 9),  RCAR_GP_PIN(0, 11),
> > +		RCAR_GP_PIN(0, 8),  RCAR_GP_PIN(0, 10),
> > +		RCAR_GP_PIN(0, 2),  RCAR_GP_PIN(0, 3),
> > +	},
> > +};
> > +
> > +static const union vin_data vin5_data_a_mux = {
> > +	.data16 = {
> > +		VI5_DATA0_A_MARK,  VI5_DATA1_A_MARK,
> > +		VI5_DATA2_A_MARK,  VI5_DATA3_A_MARK,
> > +		VI5_DATA4_A_MARK,  VI5_DATA5_A_MARK,
> > +		VI5_DATA6_A_MARK,  VI5_DATA7_A_MARK,
> > +		VI5_DATA8_A_MARK,  VI5_DATA9_A_MARK,
> > +		VI5_DATA10_A_MARK, VI5_DATA11_A_MARK,
> > +		VI5_DATA12_A_MARK, VI5_DATA13_A_MARK,
> > +		VI5_DATA14_A_MARK, VI5_DATA15_A_MARK,
> > +	},
> > +};
> > +
> > +static const union vin_data vin5_data_b_pins = {
> > +	.data8 = {
> > +		RCAR_GP_PIN(2, 23), RCAR_GP_PIN(0, 4),
> > +		RCAR_GP_PIN(0, 7),  RCAR_GP_PIN(0, 12),
> > +		RCAR_GP_PIN(0, 13), RCAR_GP_PIN(0, 14),
> > +		RCAR_GP_PIN(0, 16), RCAR_GP_PIN(0, 17),
> > +	},
> > +};
> > +
> > +static const union vin_data vin5_data_b_mux = {
> > +	.data8 = {
> > +		VI5_DATA0_B_MARK,  VI5_DATA1_B_MARK,
> > +		VI5_DATA2_B_MARK,  VI5_DATA3_B_MARK,
> > +		VI5_DATA4_B_MARK,  VI5_DATA5_B_MARK,
> > +		VI5_DATA6_B_MARK,  VI5_DATA7_B_MARK,
> > +	},
> > +};
> > +
> > +static const unsigned int vin5_sync_a_pins[] = {
> > +	/* HSYNC_N, VSYNC_N */
> > +	RCAR_GP_PIN(1, 8), RCAR_GP_PIN(1, 9),
> > +};
> > +
> > +static const unsigned int vin5_sync_a_mux[] = {
> > +	VI5_HSYNC_N_A_MARK, VI5_VSYNC_N_A_MARK,
> > +};
> > +
> > +static const unsigned int vin5_field_a_pins[] = {
> > +	RCAR_GP_PIN(1, 10),
> > +};
> > +
> > +static const unsigned int vin5_field_a_mux[] = {
> > +	VI5_FIELD_A_MARK,
> > +};
> > +
> > +static const unsigned int vin5_clkenb_a_pins[] = {
> > +	RCAR_GP_PIN(0, 1),
> > +};
> > +
> > +static const unsigned int vin5_clkenb_a_mux[] = {
> > +	VI5_CLKENB_A_MARK,
> > +};

2) VIN5 synchronism signals (V/HSYNC, CLKENB, FIELD) are marked as
   "_A" only, while VIN4 ones have not _A or _B extensions and are
   shared between _A and _B group. The VIN5_#_A extension is an
   indication that synchronism signals for group _B are not
   multiplexed but active be default according to Morimoto-san, that
   is about to confirm this with HW team. In that case, we need to
   decide if to provide an 'vin5_sync_b' group anyway to let user
   select it from DTS. Otherwise it won't be possible to select
   synchronism pins for VIN5_B group (which is maybe fine if they're
   not multiplexed at all).

Thanks
   j

> > +
> > +static const unsigned int vin5_clk_a_pins[] = {
> > +	RCAR_GP_PIN(1, 0),
> > +};
> > +
> > +static const unsigned int vin5_clk_a_mux[] = {
> > +	VI5_CLK_A_MARK,
> > +};
> > +
> > +static const unsigned int vin5_clk_b_pins[] = {
> > +	RCAR_GP_PIN(2, 22),
> > +};
> > +
> > +static const unsigned int vin5_clk_b_mux[] = {
> > +	VI5_CLK_B_MARK,
> > +};
> > +
> >  static const struct sh_pfc_pin_group pinmux_groups[] = {
> >  	SH_PFC_PIN_GROUP(avb_link),
> >  	SH_PFC_PIN_GROUP(avb_magic),
> > @@ -1889,6 +2077,32 @@ static const struct sh_pfc_pin_group pinmux_groups[] = {
> >  	SH_PFC_PIN_GROUP(usb0_id),
> >  	SH_PFC_PIN_GROUP(usb30),
> >  	SH_PFC_PIN_GROUP(usb30_id),
> > +	VIN_DATA_PIN_GROUP(vin4_data_a, 8),
> > +	VIN_DATA_PIN_GROUP(vin4_data_a, 10),
> > +	VIN_DATA_PIN_GROUP(vin4_data_a, 12),
> > +	VIN_DATA_PIN_GROUP(vin4_data_a, 16),
> > +	VIN_DATA_PIN_GROUP(vin4_data_a, 20),
> > +	VIN_DATA_PIN_GROUP(vin4_data_a, 24),
> > +	VIN_DATA_PIN_GROUP(vin4_data_b, 8),
> > +	VIN_DATA_PIN_GROUP(vin4_data_b, 10),
> > +	VIN_DATA_PIN_GROUP(vin4_data_b, 12),
> > +	VIN_DATA_PIN_GROUP(vin4_data_b, 16),
> > +	VIN_DATA_PIN_GROUP(vin4_data_b, 20),
> > +	VIN_DATA_PIN_GROUP(vin4_data_b, 24),
> > +	SH_PFC_PIN_GROUP(vin4_sync),
> > +	SH_PFC_PIN_GROUP(vin4_field),
> > +	SH_PFC_PIN_GROUP(vin4_clkenb),
> > +	SH_PFC_PIN_GROUP(vin4_clk),
> > +	VIN_DATA_PIN_GROUP(vin5_data_a, 8),
> > +	VIN_DATA_PIN_GROUP(vin5_data_a, 10),
> > +	VIN_DATA_PIN_GROUP(vin5_data_a, 12),
> > +	VIN_DATA_PIN_GROUP(vin5_data_a, 16),
> > +	VIN_DATA_PIN_GROUP(vin5_data_b, 8),
> > +	SH_PFC_PIN_GROUP(vin5_sync_a),
> > +	SH_PFC_PIN_GROUP(vin5_field_a),
> > +	SH_PFC_PIN_GROUP(vin5_clkenb_a),
> > +	SH_PFC_PIN_GROUP(vin5_clk_a),
> > +	SH_PFC_PIN_GROUP(vin5_clk_b),
> >  };
> >
> >  static const char * const avb_groups[] = {
> > @@ -1996,6 +2210,40 @@ static const char * const usb30_groups[] = {
> >  	"usb30_id",
> >  };
> >
> > +static const char * const vin4_groups[] = {
> > +	"vin4_data8_a",
> > +	"vin4_data10_a",
> > +	"vin4_data12_a",
> > +	"vin4_data16_a",
> > +	"vin4_data20_a",
> > +	"vin4_data24_a",
> > +	"vin4_data8_b",
> > +	"vin4_data10_b",
> > +	"vin4_data12_b",
> > +	"vin4_data16_b",
> > +	"vin4_data20_b",
> > +	"vin4_data24_b",
> > +	"vin4_data8_sft8",
> > +	"vin4_sync",
> > +	"vin4_field",
> > +	"vin4_clkenb",
> > +	"vin4_clk",
> > +};
> > +
> > +static const char * const vin5_groups[] = {
> > +	"vin5_data8_a",
> > +	"vin5_data8_sft8_a",
> > +	"vin5_data10_a",
> > +	"vin5_data12_a",
> > +	"vin5_data16_a",
> > +	"vin5_data8_b",
> > +	"vin5_sync_a",
> > +	"vin5_field_a",
> > +	"vin5_clkenb_a",
> > +	"vin5_clk_a",
> > +	"vin5_clk_b",
> > +};
> > +
> >  static const struct sh_pfc_function pinmux_functions[] = {
> >  	SH_PFC_FUNCTION(avb),
> >  	SH_PFC_FUNCTION(i2c1),
> > @@ -2013,6 +2261,8 @@ static const struct sh_pfc_function pinmux_functions[] = {
> >  	SH_PFC_FUNCTION(scif_clk),
> >  	SH_PFC_FUNCTION(usb0),
> >  	SH_PFC_FUNCTION(usb30),
> > +	SH_PFC_FUNCTION(vin4),
> > +	SH_PFC_FUNCTION(vin5),
> >  };
> >
> >  static const struct pinmux_cfg_reg pinmux_config_regs[] = {
> > --
> > 2.7.4
> >

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