On 28.07.2015 17:51, Joonyoung Shim wrote: > This is simplest solution about reported problem[1]. It's no problem to > clear channel only when iommu is enabled, if we consider that we cannot > recognize iommu errors when iommu is disabled and it have been valid > until now. But this cannot be nice solution. > > [1] https://lkml.org/lkml/2015/7/21/404 > > Reported-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> > Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx> I tested this patch on my Odroid XU3-Lite with hardkernel u-boot and it fixes the booting hang. Thanks! The test was not thorough - only booting and without any display output (HDMI). Best regards, Krzysztof > --- > v2: add Reported-by. > > drivers/gpu/drm/exynos/exynos_drm_fimd.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c > index 8d362b9..337af02 100644 > --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c > +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c > @@ -956,7 +956,8 @@ static int fimd_bind(struct device *dev, struct device *master, void *data) > if (ctx->display) > exynos_drm_create_enc_conn(drm_dev, ctx->display); > > - fimd_clear_channels(ctx->crtc); > + if (is_drm_iommu_supported(drm_dev)) > + fimd_clear_channels(ctx->crtc); > > ret = drm_iommu_attach_device(drm_dev, dev); > if (ret) > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
