The komeda internal resources (pipelines) are shared between crtcs, and resources release by disable_crtc. This commit is working for once user forgot disabling crtc like app quit abnomally, and then the resources can not be used by another crtc. Adds drop_master to shutdown the device and make sure all the komeda resources have been released and can be used for the next usage.
Signed-off-by: Lowry Li (Arm Technology China) lowry.li@arm.com --- drivers/gpu/drm/arm/display/komeda/komeda_kms.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c index 8543860..647bce5 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c @@ -54,11 +54,24 @@ static irqreturn_t komeda_kms_irq_handler(int irq, void *data) return status; }
+/* Komeda internal resources (pipelines) are shared between crtcs, and resources + * are released by disable_crtc. But if user forget disabling crtc like app quit + * abnormally, the resources can not be used by another crtc. + * Use drop_master to shutdown the device and make sure all the komeda resources + * have been released, and can be used for the next usage. + */ +static void komeda_kms_drop_master(struct drm_device *dev, + struct drm_file *file_priv) +{ + drm_atomic_helper_shutdown(dev); +} + static struct drm_driver komeda_kms_driver = { .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_PRIME | DRIVER_HAVE_IRQ, .lastclose = drm_fb_helper_lastclose, .irq_handler = komeda_kms_irq_handler, + .master_drop = komeda_kms_drop_master, .gem_free_object_unlocked = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .dumb_create = komeda_gem_cma_dumb_create,