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In-Reply-To: <20210820111504.350-18-chun-jie.chen@mediatek.com>
From:   Chen-Yu Tsai <wenst@chromium.org>
Date:   Wed, 25 Aug 2021 18:52:34 +0800
Message-ID: <CAGXv+5FE3teHW+7+Sa+0Ec9_ey1eNr0Z40kgVqtzt8d8c-wXYg@mail.gmail.com>
Subject: Re: [v2 17/24] clk: mediatek: Add MT8195 vdosys0 clock support
To:     Chun-Jie Chen <chun-jie.chen@mediatek.com>
Cc:     Matthias Brugger <matthias.bgg@gmail.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Nicolas Boichat <drinkcat@chromium.org>,
        Rob Herring <robh+dt@kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@lists.infradead.org>,
        LKML <linux-kernel@vger.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@lists.infradead.org>, linux-clk@vger.kernel.org,
        Devicetree List <devicetree@vger.kernel.org>,
        srv_heupstream <srv_heupstream@mediatek.com>,
        Project_Global_Chrome_Upstream_Group 
        <Project_Global_Chrome_Upstream_Group@mediatek.com>
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Precedence: bulk

On Fri, Aug 20, 2021 at 7:30 PM Chun-Jie Chen
<chun-jie.chen@mediatek.com> wrote:
>
> Add MT8195 vdosys0 clock controller which providers clock gate
> control in video system.
>
> Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
> ---
> Integrate with mtk-mmsys driver which will pupulate device by
> platform_device_register_data to start vdosys clock driver

This should be part of your commit log, with an explanation of why
this design choice was made.

Code looks good overall.

ChenYu


> ---
>  drivers/clk/mediatek/Makefile          |   2 +-
>  drivers/clk/mediatek/clk-mt8195-vdo0.c | 123 +++++++++++++++++++++++++
>  2 files changed, 124 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/clk/mediatek/clk-mt8195-vdo0.c
>
> diff --git a/drivers/clk/mediatek/Makefile b/drivers/clk/mediatek/Makefile
> index ac269f6d39e3..d22731316b7c 100644
> --- a/drivers/clk/mediatek/Makefile
> +++ b/drivers/clk/mediatek/Makefile
> @@ -82,6 +82,6 @@ obj-$(CONFIG_COMMON_CLK_MT8192_VDECSYS) += clk-mt8192-vdec.o
>  obj-$(CONFIG_COMMON_CLK_MT8192_VENCSYS) += clk-mt8192-venc.o
>  obj-$(CONFIG_COMMON_CLK_MT8195) += clk-mt8195-apmixedsys.o clk-mt8195-topckgen.o clk-mt8195-peri_ao.o clk-mt8195-infra_ao.o clk-mt8195-cam.o \
>                                         clk-mt8195-ccu.o clk-mt8195-img.o clk-mt8195-ipe.o clk-mt8195-mfg.o clk-mt8195-scp_adsp.o \
> -                                       clk-mt8195-vdec.o
> +                                       clk-mt8195-vdec.o clk-mt8195-vdo0.o
>  obj-$(CONFIG_COMMON_CLK_MT8516) += clk-mt8516.o
>  obj-$(CONFIG_COMMON_CLK_MT8516_AUDSYS) += clk-mt8516-aud.o
> diff --git a/drivers/clk/mediatek/clk-mt8195-vdo0.c b/drivers/clk/mediatek/clk-mt8195-vdo0.c
> new file mode 100644
> index 000000000000..5d8facac3a2b
> --- /dev/null
> +++ b/drivers/clk/mediatek/clk-mt8195-vdo0.c
> @@ -0,0 +1,123 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +//
> +// Copyright (c) 2021 MediaTek Inc.
> +// Author: Chun-Jie Chen <chun-jie.chen@mediatek.com>
> +
> +#include "clk-gate.h"
> +#include "clk-mtk.h"
> +
> +#include <dt-bindings/clock/mt8195-clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/platform_device.h>
> +
> +static const struct mtk_gate_regs vdo0_0_cg_regs = {
> +       .set_ofs = 0x104,
> +       .clr_ofs = 0x108,
> +       .sta_ofs = 0x100,
> +};
> +
> +static const struct mtk_gate_regs vdo0_1_cg_regs = {
> +       .set_ofs = 0x114,
> +       .clr_ofs = 0x118,
> +       .sta_ofs = 0x110,
> +};
> +
> +static const struct mtk_gate_regs vdo0_2_cg_regs = {
> +       .set_ofs = 0x124,
> +       .clr_ofs = 0x128,
> +       .sta_ofs = 0x120,
> +};
> +
> +#define GATE_VDO0_0(_id, _name, _parent, _shift)                       \
> +       GATE_MTK(_id, _name, _parent, &vdo0_0_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
> +
> +#define GATE_VDO0_1(_id, _name, _parent, _shift)                       \
> +       GATE_MTK(_id, _name, _parent, &vdo0_1_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
> +
> +#define GATE_VDO0_2(_id, _name, _parent, _shift)                       \
> +       GATE_MTK(_id, _name, _parent, &vdo0_2_cg_regs, _shift, &mtk_clk_gate_ops_setclr)
> +
> +static const struct mtk_gate vdo0_clks[] = {
> +       /* VDO0_0 */
> +       GATE_VDO0_0(CLK_VDO0_DISP_OVL0, "vdo0_disp_ovl0", "top_vpp", 0),
> +       GATE_VDO0_0(CLK_VDO0_DISP_COLOR0, "vdo0_disp_color0", "top_vpp", 2),
> +       GATE_VDO0_0(CLK_VDO0_DISP_COLOR1, "vdo0_disp_color1", "top_vpp", 3),
> +       GATE_VDO0_0(CLK_VDO0_DISP_CCORR0, "vdo0_disp_ccorr0", "top_vpp", 4),
> +       GATE_VDO0_0(CLK_VDO0_DISP_CCORR1, "vdo0_disp_ccorr1", "top_vpp", 5),
> +       GATE_VDO0_0(CLK_VDO0_DISP_AAL0, "vdo0_disp_aal0", "top_vpp", 6),
> +       GATE_VDO0_0(CLK_VDO0_DISP_AAL1, "vdo0_disp_aal1", "top_vpp", 7),
> +       GATE_VDO0_0(CLK_VDO0_DISP_GAMMA0, "vdo0_disp_gamma0", "top_vpp", 8),
> +       GATE_VDO0_0(CLK_VDO0_DISP_GAMMA1, "vdo0_disp_gamma1", "top_vpp", 9),
> +       GATE_VDO0_0(CLK_VDO0_DISP_DITHER0, "vdo0_disp_dither0", "top_vpp", 10),
> +       GATE_VDO0_0(CLK_VDO0_DISP_DITHER1, "vdo0_disp_dither1", "top_vpp", 11),
> +       GATE_VDO0_0(CLK_VDO0_DISP_OVL1, "vdo0_disp_ovl1", "top_vpp", 16),
> +       GATE_VDO0_0(CLK_VDO0_DISP_WDMA0, "vdo0_disp_wdma0", "top_vpp", 17),
> +       GATE_VDO0_0(CLK_VDO0_DISP_WDMA1, "vdo0_disp_wdma1", "top_vpp", 18),
> +       GATE_VDO0_0(CLK_VDO0_DISP_RDMA0, "vdo0_disp_rdma0", "top_vpp", 19),
> +       GATE_VDO0_0(CLK_VDO0_DISP_RDMA1, "vdo0_disp_rdma1", "top_vpp", 20),
> +       GATE_VDO0_0(CLK_VDO0_DSI0, "vdo0_dsi0", "top_vpp", 21),
> +       GATE_VDO0_0(CLK_VDO0_DSI1, "vdo0_dsi1", "top_vpp", 22),
> +       GATE_VDO0_0(CLK_VDO0_DSC_WRAP0, "vdo0_dsc_wrap0", "top_vpp", 23),
> +       GATE_VDO0_0(CLK_VDO0_VPP_MERGE0, "vdo0_vpp_merge0", "top_vpp", 24),
> +       GATE_VDO0_0(CLK_VDO0_DP_INTF0, "vdo0_dp_intf0", "top_vpp", 25),
> +       GATE_VDO0_0(CLK_VDO0_DISP_MUTEX0, "vdo0_disp_mutex0", "top_vpp", 26),
> +       GATE_VDO0_0(CLK_VDO0_DISP_IL_ROT0, "vdo0_disp_il_rot0", "top_vpp", 27),
> +       GATE_VDO0_0(CLK_VDO0_APB_BUS, "vdo0_apb_bus", "top_vpp", 28),
> +       GATE_VDO0_0(CLK_VDO0_FAKE_ENG0, "vdo0_fake_eng0", "top_vpp", 29),
> +       GATE_VDO0_0(CLK_VDO0_FAKE_ENG1, "vdo0_fake_eng1", "top_vpp", 30),
> +       /* VDO0_1 */
> +       GATE_VDO0_1(CLK_VDO0_DL_ASYNC0, "vdo0_dl_async0", "top_vpp", 0),
> +       GATE_VDO0_1(CLK_VDO0_DL_ASYNC1, "vdo0_dl_async1", "top_vpp", 1),
> +       GATE_VDO0_1(CLK_VDO0_DL_ASYNC2, "vdo0_dl_async2", "top_vpp", 2),
> +       GATE_VDO0_1(CLK_VDO0_DL_ASYNC3, "vdo0_dl_async3", "top_vpp", 3),
> +       GATE_VDO0_1(CLK_VDO0_DL_ASYNC4, "vdo0_dl_async4", "top_vpp", 4),
> +       GATE_VDO0_1(CLK_VDO0_DISP_MONITOR0, "vdo0_disp_monitor0", "top_vpp", 5),
> +       GATE_VDO0_1(CLK_VDO0_DISP_MONITOR1, "vdo0_disp_monitor1", "top_vpp", 6),
> +       GATE_VDO0_1(CLK_VDO0_DISP_MONITOR2, "vdo0_disp_monitor2", "top_vpp", 7),
> +       GATE_VDO0_1(CLK_VDO0_DISP_MONITOR3, "vdo0_disp_monitor3", "top_vpp", 8),
> +       GATE_VDO0_1(CLK_VDO0_DISP_MONITOR4, "vdo0_disp_monitor4", "top_vpp", 9),
> +       GATE_VDO0_1(CLK_VDO0_SMI_GALS, "vdo0_smi_gals", "top_vpp", 10),
> +       GATE_VDO0_1(CLK_VDO0_SMI_COMMON, "vdo0_smi_common", "top_vpp", 11),
> +       GATE_VDO0_1(CLK_VDO0_SMI_EMI, "vdo0_smi_emi", "top_vpp", 12),
> +       GATE_VDO0_1(CLK_VDO0_SMI_IOMMU, "vdo0_smi_iommu", "top_vpp", 13),
> +       GATE_VDO0_1(CLK_VDO0_SMI_LARB, "vdo0_smi_larb", "top_vpp", 14),
> +       GATE_VDO0_1(CLK_VDO0_SMI_RSI, "vdo0_smi_rsi", "top_vpp", 15),
> +       /* VDO0_2 */
> +       GATE_VDO0_2(CLK_VDO0_DSI0_DSI, "vdo0_dsi0_dsi", "top_dsi_occ", 0),
> +       GATE_VDO0_2(CLK_VDO0_DSI1_DSI, "vdo0_dsi1_dsi", "top_dsi_occ", 8),
> +       GATE_VDO0_2(CLK_VDO0_DP_INTF0_DP_INTF, "vdo0_dp_intf0_dp_intf", "top_edp", 16),
> +};
> +
> +static int clk_mt8195_vdo0_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       struct device_node *node = dev->parent->of_node;
> +       struct clk_onecell_data *clk_data;
> +       int r;
> +
> +       clk_data = mtk_alloc_clk_data(CLK_VDO0_NR_CLK);
> +       if (!clk_data)
> +               return -ENOMEM;
> +
> +       r = mtk_clk_register_gates(node, vdo0_clks, ARRAY_SIZE(vdo0_clks), clk_data);
> +       if (r)
> +               goto free_vdo0_data;
> +
> +       r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
> +       if (r)
> +               goto free_vdo0_data;
> +
> +       return r;
> +
> +free_vdo0_data:
> +       mtk_free_clk_data(clk_data);
> +       return r;
> +}
> +
> +static struct platform_driver clk_mt8195_vdo0_drv = {
> +       .probe = clk_mt8195_vdo0_probe,
> +       .driver = {
> +               .name = "clk-mt8195-vdo0",
> +       },
> +};
> +builtin_platform_driver(clk_mt8195_vdo0_drv);
> --
> 2.18.0
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