From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
To: Samuel Holland <samuel@sholland.org>
Cc: Kishon Vijay Abraham I <kishon@ti.com>,
Vinod Koul <vkoul@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Maxime Ripard <mripard@kernel.org>,
Jagan Teki <jagan@amarulasolutions.com>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Maxime Ripard <maxime@cerno.tech>,
Rob Herring <robh+dt@kernel.org>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org,
linux-sunxi@lists.linux.dev
Subject: Re: [PATCH 5/8] phy: allwinner: phy-sun6i-mipi-dphy: Make RX support optional
Date: Mon, 26 Sep 2022 11:30:13 +0200 [thread overview]
Message-ID: <YzFxJUhypKHkSGgy@aptenodytes> (raw)
In-Reply-To: <20220812075603.59375-6-samuel@sholland.org>
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Hi Samuel,
On Fri 12 Aug 22, 02:56, Samuel Holland wrote:
> While all variants of the DPHY likely support RX mode, the new variant
> in the A100 is not used in this direction by the BSP, and it has some
> analog register changes, so its RX power-on sequence is unknown. To be
> safe, limit RX support to variants where the power-on sequence is known.
Coming back to this series, with some minor cosmetic suggestions.
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> ---
>
> drivers/phy/allwinner/phy-sun6i-mipi-dphy.c | 25 +++++++++++++++++++--
> 1 file changed, 23 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/phy/allwinner/phy-sun6i-mipi-dphy.c b/drivers/phy/allwinner/phy-sun6i-mipi-dphy.c
> index 3900f1650851..625c6e1e9990 100644
> --- a/drivers/phy/allwinner/phy-sun6i-mipi-dphy.c
> +++ b/drivers/phy/allwinner/phy-sun6i-mipi-dphy.c
> @@ -114,6 +114,10 @@ enum sun6i_dphy_direction {
> SUN6I_DPHY_DIRECTION_RX,
> };
>
> +struct sun6i_dphy_variant {
> + bool supports_rx;
Since you're introducing a "tx_power_on" field later on, it would be more
consistent to call this one "rx_supported".
> +};
> +
> struct sun6i_dphy {
> struct clk *bus_clk;
> struct clk *mod_clk;
> @@ -123,6 +127,7 @@ struct sun6i_dphy {
> struct phy *phy;
> struct phy_configure_opts_mipi_dphy config;
>
> + const struct sun6i_dphy_variant *variant;
> enum sun6i_dphy_direction direction;
> };
>
> @@ -409,6 +414,10 @@ static int sun6i_dphy_probe(struct platform_device *pdev)
> if (!dphy)
> return -ENOMEM;
>
> + dphy->variant = device_get_match_data(&pdev->dev);
> + if (!dphy->variant)
> + return -EINVAL;
> +
> regs = devm_platform_ioremap_resource(pdev, 0);
> if (IS_ERR(regs)) {
> dev_err(&pdev->dev, "Couldn't map the DPHY encoder registers\n");
> @@ -445,8 +454,13 @@ static int sun6i_dphy_probe(struct platform_device *pdev)
> ret = of_property_read_string(pdev->dev.of_node, "allwinner,direction",
> &direction);
>
> - if (!ret && !strncmp(direction, "rx", 2))
> + if (!ret && !strncmp(direction, "rx", 2)) {
> + if (!dphy->variant->supports_rx) {
> + dev_err(&pdev->dev, "RX not supported on this variant\n");
> + return -EOPNOTSUPP;
> + }
Maybe add a blank line here for readability.
Looks good to me otherwise!
Paul
> dphy->direction = SUN6I_DPHY_DIRECTION_RX;
> + }
>
> phy_set_drvdata(dphy->phy, dphy);
> phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
> @@ -454,8 +468,15 @@ static int sun6i_dphy_probe(struct platform_device *pdev)
> return PTR_ERR_OR_ZERO(phy_provider);
> }
>
> +static const struct sun6i_dphy_variant sun6i_a31_mipi_dphy_variant = {
> + .supports_rx = true,
> +};
> +
> static const struct of_device_id sun6i_dphy_of_table[] = {
> - { .compatible = "allwinner,sun6i-a31-mipi-dphy" },
> + {
> + .compatible = "allwinner,sun6i-a31-mipi-dphy",
> + .data = &sun6i_a31_mipi_dphy_variant,
> + },
> { }
> };
> MODULE_DEVICE_TABLE(of, sun6i_dphy_of_table);
> --
> 2.35.1
>
--
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com
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next prev parent reply other threads:[~2022-09-26 9:31 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-12 7:55 [PATCH 0/8] phy: allwinner: phy-sun6i-mipi-dphy: Add the A100 DPHY Samuel Holland
2022-08-12 7:55 ` [PATCH 1/8] dt-bindings: sun6i-a31-mipi-dphy: Add the interrupts property Samuel Holland
2022-08-12 10:45 ` Krzysztof Kozlowski
2022-08-12 22:19 ` Samuel Holland
2022-08-16 10:18 ` Krzysztof Kozlowski
2022-09-26 9:28 ` Paul Kocialkowski
2022-09-27 9:36 ` Paul Kocialkowski
2022-08-12 12:22 ` Paul Kocialkowski
2022-08-12 22:44 ` Samuel Holland
2022-11-08 5:17 ` Samuel Holland
2022-08-12 15:13 ` Rob Herring
2022-08-12 7:55 ` [PATCH 2/8] ARM: dts: sun8i: a33: Add DPHY interrupt Samuel Holland
2022-08-12 7:55 ` [PATCH 3/8] arm64: dts: allwinner: a64: " Samuel Holland
2022-08-12 7:55 ` [PATCH 4/8] dt-bindings: sun6i-a31-mipi-dphy: Add the A100 DPHY variant Samuel Holland
2022-08-12 10:47 ` Krzysztof Kozlowski
2022-08-25 10:41 ` Paul Kocialkowski
2022-08-25 14:37 ` Samuel Holland
2022-08-12 7:56 ` [PATCH 5/8] phy: allwinner: phy-sun6i-mipi-dphy: Make RX support optional Samuel Holland
2022-09-26 9:30 ` Paul Kocialkowski [this message]
2022-08-12 7:56 ` [PATCH 6/8] phy: allwinner: phy-sun6i-mipi-dphy: Set enable bit last Samuel Holland
2022-08-12 12:03 ` Paul Kocialkowski
2022-08-12 22:31 ` Samuel Holland
2022-08-25 10:26 ` Paul Kocialkowski
2022-08-12 7:56 ` [PATCH 7/8] phy: allwinner: phy-sun6i-mipi-dphy: Add a variant power-on hook Samuel Holland
2022-08-12 7:56 ` [PATCH 8/8] phy: allwinner: phy-sun6i-mipi-dphy: Add the A100 DPHY variant Samuel Holland
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