Hi,
On Thursday, January 09, 2014 08:58:12 AM Shaik Ameer Basha wrote:
> This patch adds the core functionality for the SCALER driver.
>
> Signed-off-by: Shaik Ameer Basha <shaik.am...@samsung.com>
> Reviewed-by: Sylwester Nawrocki <s.nawro...@samsung.com>
> ---
> drivers/media/platform/exynos-scaler/scaler.c | 1231
> +++++++++++++++++++++++++
> drivers/media/platform/exynos-scaler/scaler.h | 376 ++++++++
> 2 files changed, 1607 insertions(+)
> create mode 100644 drivers/media/platform/exynos-scaler/scaler.c
> create mode 100644 drivers/media/platform/exynos-scaler/scaler.h
[...]
> +static int scaler_probe(struct platform_device *pdev)
> +{
> + struct scaler_dev *scaler;
> + struct resource *res;
> + struct device *dev = &pdev->dev;
> + int ret;
> +
> + if (!dev->of_node)
> + return -ENODEV;
> +
> + scaler = devm_kzalloc(dev, sizeof(*scaler), GFP_KERNEL);
> + if (!scaler)
> + return -ENOMEM;
> +
> + scaler->pdev = pdev;
> + scaler->variant = scaler_get_variant_data(pdev);
> +
> + init_waitqueue_head(&scaler->irq_queue);
> + spin_lock_init(&scaler->slock);
> + mutex_init(&scaler->lock);
> + scaler->clock = ERR_PTR(-EINVAL);
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + scaler->regs = devm_request_and_ioremap(dev, res);
> + if (!scaler->regs)
> + return -ENODEV;
> +
> + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> + if (!res) {
> + dev_err(dev, "failed to get IRQ resource\n");
> + return -ENXIO;
> + }
> +
> + ret = scaler_clk_get(scaler);
> + if (ret < 0)
> + return ret;
> +
> + ret = devm_request_irq(dev, res->start, scaler_irq_handler,
> + 0, pdev->name, scaler);
> + if (ret < 0) {
> + dev_err(dev, "failed to install irq (%d)\n", ret);
> + goto err_clk;
> + }
> +
> + platform_set_drvdata(pdev, scaler);
> + pm_runtime_enable(dev);
> +
> + /* Initialize the continious memory allocator */
> + scaler->alloc_ctx = vb2_dma_contig_init_ctx(dev);
> + if (IS_ERR(scaler->alloc_ctx)) {
> + ret = PTR_ERR(scaler->alloc_ctx);
> + goto err_clk;
> + }
> +
> + ret = v4l2_device_register(dev, &scaler->v4l2_dev);
> + if (ret < 0)
> + goto err_clk;
> +
> + ret = scaler_register_m2m_device(scaler);
> + if (ret < 0)
> + goto err_v4l2;
> +
> + dev_info(dev, "registered successfully\n");
> + return 0;
> +
> +err_v4l2:
> + v4l2_device_unregister(&scaler->v4l2_dev);
> +err_clk:
> + scaler_clk_put(scaler);
vb2_dma_contig_cleanup_ctx() and pm_runtime_disable() calls on
failure are missing
> + return ret;
> +}
> +
> +static int scaler_remove(struct platform_device *pdev)
> +{
> + struct scaler_dev *scaler = platform_get_drvdata(pdev);
> +
> + scaler_unregister_m2m_device(scaler);
> + v4l2_device_unregister(&scaler->v4l2_dev);
> +
> + vb2_dma_contig_cleanup_ctx(scaler->alloc_ctx);
> + pm_runtime_disable(&pdev->dev);
> + scaler_clk_put(scaler);
> +
> + scaler_dbg(scaler, "%s driver unloaded\n", pdev->name);
> + return 0;
> +}
Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics
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