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drm/omap: stop connector polling during suspend 

When not using proper hotplug detection, DRM polls periodically the
connectors to find out if a cable is connected. This polling can happen
at any time, even very late in the suspend process.

This causes a problem with omapdrm, when the poll happens during the
suspend process after GPIOs have been disabled, leading to a crash in
gpio_get().

This patch fixes the issue by adding suspend and resume hooks to
omapdrm, in which we disable and enable, respectively, the polling.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2014-11-14 15:18:28 +02:00
parent f5a1d3174f
commit ccd7b5ed7d
1 changed files with 20 additions and 1 deletions
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21
drivers/gpu/drm/omapdrm/omap_drv.c
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@ -706,9 +706,28 @@ static int pdev_remove(struct platform_device *device)
return 0; return 0;
} }
static int omap_drm_suspend(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
drm_kms_helper_poll_disable(drm_dev);
return 0;
}
static int omap_drm_resume(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
drm_kms_helper_poll_enable(drm_dev);
return omap_gem_resume(dev);
}
#ifdef CONFIG_PM #ifdef CONFIG_PM
static const struct dev_pm_ops omapdrm_pm_ops = { static const struct dev_pm_ops omapdrm_pm_ops = {
.resume = omap_gem_resume, .suspend = omap_drm_suspend,
.resume = omap_drm_resume,
}; };
#endif #endif