Hi Tomi,
On 02/26/2015 03:20 PM, Tomi Valkeinen wrote:
> 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@xxxxxx>
> ---
> drivers/gpu/drm/omapdrm/omap_drv.c | 21 ++++++++++++++++++++-
> 1 file changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
> index 0ebd1315fff8..d0b1aece8cc5 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.c
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.c
> @@ -694,9 +694,28 @@ static int pdev_remove(struct platform_device *device)
> 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
> static const struct dev_pm_ops omapdrm_pm_ops = {
> - .resume = omap_gem_resume,
> + .suspend = omap_drm_suspend,
> + .resume = omap_drm_resume,
> };
> #endif
>
>
Could I ask you to update this patch as below, pls?
Regards,
-grygorii
===
drm/omap: add hibernation callbacks
Setting a dev_pm_ops suspend/resume pair but not a set of
hibernation functions means those pm functions will not be
called upon hibernation.
Fix this by using SET_SYSTEM_SLEEP_PM_OPS, which appropriately
assigns the suspend and hibernation handlers and move
omap_drm_suspend/omap_drm_resume under CONFIG_PM_SLEEP
to avoid build warnings.
Signed-off-by: Grygorii Strashko <Grygorii.Strashko@xxxxxxxxxx>
---
drivers/gpu/drm/omapdrm/omap_drv.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 7cb1c8f..4a544e4 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -715,6 +715,7 @@ static int pdev_remove(struct platform_device *device)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
static int omap_drm_suspend(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
@@ -732,21 +733,15 @@ static int omap_drm_resume(struct device *dev)
return omap_gem_resume(dev);
}
-
-#ifdef CONFIG_PM
-static const struct dev_pm_ops omapdrm_pm_ops = {
- .suspend = omap_drm_suspend,
- .resume = omap_drm_resume,
-};
#endif
+static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
+
static struct platform_driver pdev = {
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
-#ifdef CONFIG_PM
.pm = &omapdrm_pm_ops,
-#endif
},
.probe = pdev_probe,
.remove = pdev_remove,
-- 1.9.1
--
regards,
-grygorii
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