linux-kernel - Re: [PATCH] arm64: configs: Enable PCIe support for imx8mq boards

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Message-ID: <CAEyMn7bCdzFTWpXBQ8jP-drw_ykXRUhawHMZqXHsHgy-3oD6LA@mail.gmail.com>
Date:   Mon, 8 Mar 2021 13:58:41 +0100
From:   Heiko Thiery <heiko.thiery@...il.com>
To:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Michael Walle <michael@...le.cc>
Subject: Re: [PATCH] arm64: configs: Enable PCIe support for imx8mq boards

Hi all,

Am Mo., 8. März 2021 um 10:03 Uhr schrieb Heiko Thiery <heiko.thiery@...il.com>:
>
> Enable PCI_IMX6 to get PCI support for imx8mq boards like imx8mq-evk,
> imx8mq-kontron-pitx-imx8m and imx8mq-zii-ultra. This increases the image
> by 64k.

The growth of 64k is not right.

Using the support script shows:

$ scripts/bloat-o-meter vmlinux vmlinux.with_pci
add/remove: 22/2 grow/shrink: 2/0 up/down: 8338/-16 (8322)
Function                                     old     new   delta
imx6_pcie_probe                                -    1804   +1804
imx6_pcie_deassert_core_reset                  -    1356   +1356
imx6_pcie_of_match                             -    1200   +1200
imx6_pcie_start_link                           -     692    +692
imx6_pcie_suspend_noirq                        -     528    +528
imx6_pcie_init_phy                             -     496    +496
imx6_pcie_host_init                            -     336    +336
imx6_pcie_assert_core_reset                    -     332    +332
pcie_phy_write                                 -     272    +272
imx6_pcie_driver                               -     200    +200
imx6_pcie_pm_ops                               -     184    +184
pcie_phy_read                                  -     168    +168
imx6_pcie_resume_noirq                         -     156    +156
pcie_phy_wait_ack                              -     140    +140
pcie_phy_poll_ack.isra                         -     124    +124
imx6_pcie_quirk                                -     124    +124
drvdata                                        -      60     +60
dw_pcie_ops                                  208     264     +56
imx6_pcie_init                                 -      40     +40
imx6_pcie_shutdown                             -      32     +32
imx6_pcie_host_ops                             -      16     +16
e843419@...b_0001256e_27c4                     -       8      +8
e843419@...0_00007810_4f0                      -       8      +8
vermagic                                      76      82      +6
e843419@...e_0001064f_80                       8       -      -8
e843419@...3_00008212_13c                      8       -      -8
Total: Before=21884381, After=21892703, chg +0.04%


> Signed-off-by: Heiko Thiery <heiko.thiery@...il.com>
> ---
>  arch/arm64/configs/defconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index d612f633b771..4b7b4a8f1860 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -225,6 +225,7 @@ CONFIG_PCI_HOST_THUNDER_PEM=y
>  CONFIG_PCI_HOST_THUNDER_ECAM=y
>  CONFIG_PCIE_ROCKCHIP_HOST=m
>  CONFIG_PCIE_BRCMSTB=m
> +CONFIG_PCI_IMX6=y
>  CONFIG_PCI_LAYERSCAPE=y
>  CONFIG_PCIE_LAYERSCAPE_GEN4=y
>  CONFIG_PCI_HISI=y
> --
> 2.30.0
>

-- 
Heiko