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drm/msm: Get irq number within kms driver itself

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The driver gets the irq number using platform_get_irq on the main kms
platform device. This works fine since both MDP4 and MDP5 currently
have a flat device hierarchy. The platform device tied with the
drm_device points to the MDP DT node in both cases.

This won't work when MDP5 supports a tree-like hierarchy. In this
case, the platform device tied to the top level drm_device is the
MDSS DT node, and the irq we need for KMS is the one generated by
MDP5, not MDSS.

Get the irq number from the MDP4/5 kms driver itself. Each driver
can later provide the irq number based on what device hierarchy it
uses.

While we're at it, call drm_irq_install only when we have a valid KMS
driver.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Archit Taneja
2016-05-18 15:06:03 +05:30
committed by Rob Clark
parent 7429d860c1
commit a2b3a5571f
4 changed files with 31 additions and 8 deletions
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14
drivers/gpu/drm/msm/msm_drv.c
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@@ -417,12 +417,14 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
goto fail;
}
pm_runtime_get_sync(dev);
ret = drm_irq_install(ddev, platform_get_irq(pdev, 0));
pm_runtime_put_sync(dev);
if (ret < 0) {
dev_err(dev, "failed to install IRQ handler\n");
goto fail;
if (kms) {
pm_runtime_get_sync(dev);
ret = drm_irq_install(ddev, kms->irq);
pm_runtime_put_sync(dev);
if (ret < 0) {
dev_err(dev, "failed to install IRQ handler\n");
goto fail;
}
}
ret = drm_dev_register(ddev, 0);