linux-kernel - Re: [PATCH v4 4/5] media: platform: mediatek: isp

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Message-ID: <7643bfd6-5979-4ab4-bd8f-024417dc49ba@collabora.com>
Date: Thu, 11 Jan 2024 13:07:11 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Julien Stephan <jstephan@...libre.com>
Cc: Phi-bang Nguyen <pnguyen@...libre.com>,
 Florian Sylvestre <fsylvestre@...libre.com>,
 Paul Elder <paul.elder@...asonboard.com>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Andy Hsieh <andy.hsieh@...iatek.com>, Conor Dooley <conor+dt@...nel.org>,
 devicetree@...r.kernel.org,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-mediatek@...ts.infradead.org, linux-media@...r.kernel.org,
 Louis Kuo <louis.kuo@...iatek.com>, Matthias Brugger
 <matthias.bgg@...il.com>, Mauro Carvalho Chehab <mchehab@...nel.org>,
 Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v4 4/5] media: platform: mediatek: isp_30: add mediatek
 ISP3.0 camsv

Il 10/01/24 15:14, Julien Stephan ha scritto:
> From: Phi-bang Nguyen <pnguyen@...libre.com>
> 
> This driver provides a path to bypass the SoC ISP so that image data
> coming from the SENINF can go directly into memory without any image
> processing. This allows the use of an external ISP.
> 
> Signed-off-by: Phi-bang Nguyen <pnguyen@...libre.com>
> Signed-off-by: Florian Sylvestre <fsylvestre@...libre.com>
> [Paul Elder fix irq locking]
> Signed-off-by: Paul Elder <paul.elder@...asonboard.com>
> Co-developed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Co-developed-by: Julien Stephan <jstephan@...libre.com>
> Signed-off-by: Julien Stephan <jstephan@...libre.com>
> ---
>   MAINTAINERS                                   |   1 +
>   .../platform/mediatek/isp/isp_30/Kconfig      |  19 +
>   .../platform/mediatek/isp/isp_30/Makefile     |   1 +
>   .../mediatek/isp/isp_30/camsv/Makefile        |   7 +
>   .../mediatek/isp/isp_30/camsv/mtk_camsv.c     | 328 ++++++++
>   .../mediatek/isp/isp_30/camsv/mtk_camsv.h     | 199 +++++
>   .../isp/isp_30/camsv/mtk_camsv30_hw.c         | 427 ++++++++++
>   .../isp/isp_30/camsv/mtk_camsv30_regs.h       |  60 ++
>   .../isp/isp_30/camsv/mtk_camsv_video.c        | 774 ++++++++++++++++++
>   9 files changed, 1816 insertions(+)
>   create mode 100644 drivers/media/platform/mediatek/isp/isp_30/camsv/Makefile
>   create mode 100644 drivers/media/platform/mediatek/isp/isp_30/camsv/mtk_camsv.c
>   create mode 100644 drivers/media/platform/mediatek/isp/isp_30/camsv/mtk_camsv.h
>   create mode 100644 drivers/media/platform/mediatek/isp/isp_30/camsv/mtk_camsv30_hw.c
>   create mode 100644 drivers/media/platform/mediatek/isp/isp_30/camsv/mtk_camsv30_regs.h
>   create mode 100644 drivers/media/platform/mediatek/isp/isp_30/camsv/mtk_camsv_video.c
> 
.snip..

> diff --git a/drivers/media/platform/mediatek/isp/isp_30/camsv/mtk_camsv30_hw.c b/drivers/media/platform/mediatek/isp/isp_30/camsv/mtk_camsv30_hw.c
> new file mode 100644
> index 000000000000..3b8ccdab2af0
> --- /dev/null
> +++ b/drivers/media/platform/mediatek/isp/isp_30/camsv/mtk_camsv30_hw.c
> @@ -0,0 +1,427 @@

.snip..

> +
> +static int mtk_camsv30_probe(struct platform_device *pdev)
> +{
> +	static const char * const clk_names[] = { "cam", "camtg", "camsv"};
> +
> +	struct mtk_cam_dev *cam_dev;
> +	struct device *dev = &pdev->dev;
> +	int ret;
> +	int i;
> +
> +	if (!iommu_present(&platform_bus_type))
> +		return -EPROBE_DEFER;
> +
> +	cam_dev = devm_kzalloc(dev, sizeof(*cam_dev), GFP_KERNEL);
> +	if (!cam_dev)
> +		return -ENOMEM;
> +
> +	cam_dev->conf = of_device_get_match_data(dev);
> +	if (!cam_dev->conf)
> +		return -ENODEV;
> +
> +	cam_dev->dev = dev;
> +	dev_set_drvdata(dev, cam_dev);
> +
> +	cam_dev->regs = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(cam_dev->regs))
> +		return dev_err_probe(dev, PTR_ERR(cam_dev->regs),
> +				"failed to map register base\n");
> +
> +
> +	cam_dev->regs_img0 = devm_platform_ioremap_resource(pdev, 1);
> +
> +	if (IS_ERR(cam_dev->regs_img0))
> +		return dev_err_probe(dev, PTR_ERR(cam_dev->regs_img0),
> +				"failed to map img0 register base\n");
> +
> +
> +	cam_dev->regs_tg = devm_platform_ioremap_resource(pdev, 2);
> +	if (IS_ERR(cam_dev->regs_tg))
> +		return dev_err_probe(dev, PTR_ERR(cam_dev->regs_tg),
> +				"failed to map TG register base\n");
> +
> +
> +	cam_dev->num_clks = ARRAY_SIZE(clk_names);
> +	cam_dev->clks = devm_kcalloc(dev, cam_dev->num_clks,
> +				     sizeof(*cam_dev->clks), GFP_KERNEL);
> +	if (!cam_dev->clks)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < cam_dev->num_clks; ++i)
> +		cam_dev->clks[i].id = clk_names[i];
> +
> +	ret = devm_clk_bulk_get(dev, cam_dev->num_clks, cam_dev->clks);
> +	if (ret)
> +		return dev_err_probe(dev, ret, "failed to get clocks: %i\n", ret);
> +
> +
> +	cam_dev->irq = platform_get_irq(pdev, 0);
> +	ret = devm_request_irq(dev, cam_dev->irq,
> +			       isp_irq_camsv30, 0,
> +			       dev_name(dev), cam_dev);
> +	if (ret != 0)
> +		return dev_err_probe(dev, -ENODEV, "failed to request irq=%d\n",
> +				cam_dev->irq);
> +
> +	cam_dev->hw_functions = &mtk_camsv30_hw_functions;
> +
> +	spin_lock_init(&cam_dev->irqlock);
> +
> +	/* initialise runtime power management */
> +	pm_runtime_set_autosuspend_delay(dev, MTK_CAMSV30_AUTOSUSPEND_DELAY_MS);
> +	pm_runtime_use_autosuspend(dev);
> +	pm_runtime_set_suspended(dev);
> +	pm_runtime_enable(dev);

devm_pm_runtime_enable() ?

> +
> +	/* Initialize the v4l2 common part */
> +	return mtk_cam_dev_init(cam_dev);
> +}
> +
> +static int mtk_camsv30_remove(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct mtk_cam_dev *cam_dev = dev_get_drvdata(dev);
> +
> +	mtk_cam_dev_cleanup(cam_dev);
> +	pm_runtime_put_autosuspend(dev);
> +	pm_runtime_disable(dev);
> +
> +	return 0;
> +}
> +
> +static const struct dev_pm_ops mtk_camsv30_pm_ops = {
> +	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> +				pm_runtime_force_resume)
> +	SET_RUNTIME_PM_OPS(mtk_camsv30_runtime_suspend,
> +			   mtk_camsv30_runtime_resume, NULL)
> +};
> +
> +static const struct of_device_id mtk_camsv30_of_ids[] = {
> +	{ .compatible = "mediatek,mt8365-camsv", .data = &camsv30_conf },
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, mtk_camsv30_of_ids);
> +
> +static struct platform_driver mtk_camsv30_driver = {
> +	.probe = mtk_camsv30_probe,
> +	.remove = mtk_camsv30_remove,

You definitely want to use void .remove_new() here

Cheers,
Angelo