Re: [PATCH v1 04/10] media: platform: mediatek: add isp_7x cam-raw unit
flat view
From: CK Hu (胡俊光) <hidden>
Date: 2024-11-05 03:02:14
Also in:
dri-devel, linux-arm-kernel, linux-media, linux-mediatek, lkml
Hi, Shu-hsiang: On Wed, 2024-10-09 at 19:15 +0800, Shu-hsiang Yang wrote:
Introduces the ISP pipeline driver for the MediaTek ISP raw and yuv modules. Key functionalities include data processing, V4L2 integration, resource management, debug support, and various control operations. Additionally, IRQ handling, platform device management, and MediaTek ISP DMA format support are also included. Signed-off-by: Shu-hsiang Yang <redacted> ---
[snip]
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+static int mtk_raw_of_probe(struct platform_device *pdev, + struct mtk_raw_device *raw) +{ + struct device *dev = &pdev->dev; + struct resource *res; + int ret; + int n_clks; + + ret = of_property_read_u32(dev->of_node, "mediatek,cam-id", &raw->id);
You don't need raw->id. I think each raw could work independently. Each raw has its own 'struct mtk_raw_device' context data. It's not necessary to know which one it is. When you use dev_dbg() or dev_err(), it would show register base so you could identify which raw print this message. Regards, CK
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+ if (ret) { + dev_dbg(dev, "missing camid property\n"); + return ret; + } + + if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(34))) { + dev_err(dev, "%s: No suitable DMA available\n", __func__); + return -EIO; + } + + if (!dev->dma_parms) { + dev->dma_parms = + devm_kzalloc(dev, sizeof(*dev->dma_parms), GFP_KERNEL); + if (!dev->dma_parms) + return -ENOMEM; + } + + dma_set_max_seg_size(dev, UINT_MAX); + + /* base outer register */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "base"); + if (!res) { + dev_err(dev, "failed to get mem\n"); + return -ENODEV; + } + + raw->base = devm_ioremap_resource(dev, res); + if (IS_ERR(raw->base)) { + dev_err(dev, "failed to map register base\n"); + return PTR_ERR(raw->base); + } + + /* base inner register */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "inner_base"); + if (!res) { + dev_err(dev, "failed to get mem\n"); + return -ENODEV; + } + + raw->base_inner = devm_ioremap_resource(dev, res); + if (IS_ERR(raw->base_inner)) { + dev_err(dev, "failed to map register inner base\n"); + return PTR_ERR(raw->base_inner); + } + + /* will be assigned later */ + raw->yuv_base = NULL; + + raw->irq = platform_get_irq(pdev, 0); + if (raw->irq < 0) { + dev_err(dev, "failed to get irq\n"); + return -ENODEV; + } + + ret = devm_request_threaded_irq(dev, raw->irq, + mtk_irq_raw, mtk_thread_irq_raw, + 0, dev_name(dev), raw); + if (ret) { + dev_err(dev, "failed to request irq=%d\n", raw->irq); + return ret; + } + dev_dbg(dev, "registered irq=%d\n", raw->irq); + + disable_irq(raw->irq); + + n_clks = devm_clk_bulk_get_all(dev, &raw->clk_b); + if (n_clks < 0) { + dev_err(dev, "failed to devm_clk_bulk_get_all=%d\n", n_clks); + return n_clks; + } + + raw->num_clks = n_clks; + dev_info(dev, "clk_num:%d\n", raw->num_clks); + +#ifdef CONFIG_PM_SLEEP + raw->pm_notifier.notifier_call = raw_pm_notifier; + ret = register_pm_notifier(&raw->pm_notifier); + if (ret) { + dev_info(dev, "failed to register notifier block.\n"); + return ret; + } +#endif + return 0; +} +