drivers/gpu/drm/arm/display/komeda/komeda_drv.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/arm/display/komeda/komeda_drv.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/arm/display/komeda/komeda_drv.c
Extension
.c
Size
3933 bytes
Lines
171
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct komeda_drv {
	struct komeda_dev *mdev;
	struct komeda_kms_dev *kms;
};

struct komeda_dev *dev_to_mdev(struct device *dev)
{
	struct komeda_drv *mdrv = dev_get_drvdata(dev);

	return mdrv ? mdrv->mdev : NULL;
}

static void komeda_platform_remove(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct komeda_drv *mdrv = dev_get_drvdata(dev);

	komeda_kms_detach(mdrv->kms);

	if (pm_runtime_enabled(dev))
		pm_runtime_disable(dev);
	else
		komeda_dev_suspend(mdrv->mdev);

	komeda_dev_destroy(mdrv->mdev);

	dev_set_drvdata(dev, NULL);
	devm_kfree(dev, mdrv);
}

static void komeda_platform_shutdown(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct komeda_drv *mdrv = dev_get_drvdata(dev);

	komeda_kms_shutdown(mdrv->kms);
}

static int komeda_platform_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct komeda_drv *mdrv;
	int err;

	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
	if (err)
		return dev_err_probe(dev, err, "DMA mask error\n");

	mdrv = devm_kzalloc(dev, sizeof(*mdrv), GFP_KERNEL);
	if (!mdrv)
		return -ENOMEM;

	mdrv->mdev = komeda_dev_create(dev);
	if (IS_ERR(mdrv->mdev)) {
		err = PTR_ERR(mdrv->mdev);
		goto free_mdrv;
	}

	pm_runtime_enable(dev);
	if (!pm_runtime_enabled(dev))
		komeda_dev_resume(mdrv->mdev);

	mdrv->kms = komeda_kms_attach(mdrv->mdev);
	if (IS_ERR(mdrv->kms)) {
		err = PTR_ERR(mdrv->kms);
		goto destroy_mdev;
	}

	dev_set_drvdata(dev, mdrv);
	drm_client_setup(&mdrv->kms->base, NULL);

	return 0;

destroy_mdev:
	if (pm_runtime_enabled(dev))
		pm_runtime_disable(dev);
	else
		komeda_dev_suspend(mdrv->mdev);

	komeda_dev_destroy(mdrv->mdev);

free_mdrv:
	devm_kfree(dev, mdrv);
	return err;
}

static const struct of_device_id komeda_of_match[] = {
	{ .compatible = "arm,mali-d71", .data = d71_identify, },
	{ .compatible = "arm,mali-d32", .data = d71_identify, },
	{ .compatible = "armchina,linlon-d6", .data = d71_identify, },

Annotation

Implementation Notes